<PAGE>
 
                           SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
                              (Amendment No.__ )

Filed by the Registrant [X]
Filed by a Party other than the Registrant [_]

Check the appropriate box:

[_]    Preliminary Proxy Statement
[_]    Confidential, for Use of the Commission Only 
       (as permitted by Rule 14a-6(e)(2))
[X]    Definitive Proxy Statement
[_]    Definitive Additional Materials
[_]    Soliciting Material Pursuant to (S)240.14a-11(c) or (S)240.14a-12

                            ALPHA INDUSTRIES, INC.
- --------------------------------------------------------------------------------
               (Name of Registrant as Specified In Its Charter)

                                      N/A
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[X]    $125 per Exchange Act Rules 0-11(c)(1)(ii), 14a-6(i)(1), 14a-6(i)(2) or 

       Item 22(a)(2) of Schedule 14A.
[_]    $500 per each party to the controversy pursuant to Exchange Act 
       Rule 14a-6(i)(3).
[_]    Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

       1)      Title of each class of securities to which transaction applies:

               Common Stock, $.25 par value
               -----------------------------------------------------------------
       2)      Aggregate number of securities to which transaction applies:

               9,754,439
               -----------------------------------------------------------------
       3)      Per unit price or other underlying value of transaction computed
               pursuant to Exchange Act Rule 0-11 (Set forth the amount on which
               the filing fee is calculated and state how it was determined):

               N/A
               -----------------------------------------------------------------
       4)      Proposed maximum aggregate value of transaction:

               N/A
               -----------------------------------------------------------------
       5)      Total fee paid:

               $125.00
               -----------------------------------------------------------------

[_]    Fee paid previously with preliminary materials.
[_]    Check box if any part of the fee is offset as provided by Exchange Act
       Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
       paid previously. Identify the previous filing by registration statement
       number, or the Form or Schedule and the date of its filing.

       1)      Amount Previously Paid:

               N/A
               -----------------------------------------------------------------
       2)      Form, Schedule or Registration Statement No.:

               N/A
               -----------------------------------------------------------------
       3)      Filing Party:

               N/A
               -----------------------------------------------------------------
       4)      Date Filed:

               N/A
               -----------------------------------------------------------------

<PAGE>
 
                    [LOGO OF ALPHA INDUSTRIES APPEARS HERE]

                             ALPHA INDUSTRIES, INC.


                   Notice of Annual Meeting of Stockholders of
             Alpha Industries, Inc. to be held on September 8, 1997

The Annual Meeting of Stockholders of ALPHA INDUSTRIES, INC. (the "Company")
will be held on Monday, September 8, 1997, at 2:00 p.m. at the Wyndham Garden
Hotel, 30 Wheeler Road, Burlington, Massachusetts for the following purposes:

1.    To elect three Class 2 directors, each to hold office until the 2000
      Annual Meeting of Stockholders and until their respective successors are
      elected and qualified;

2.    To consider and act upon a proposal to approve the continuation of the
      Alpha Industries, Inc. Shareholder Rights Agreement; and

3.    To consider and act upon any other matters which may properly come before
      the Meeting or any adjourned session thereof.

The Board of Directors has fixed July 17, 1997, as the record date for
determining the stockholders entitled to notice of, and to vote at, the Meeting.

You are cordially invited to attend the Meeting.

                                          By Order of the Board of Directors



                                          JAMES C. NEMIAH, Secretary


Boston, Massachusetts
J
uly 30, 1997



                             YOUR VOTE IS IMPORTANT

You are urged to date, sign and promptly return the accompanying form of proxy,
so that if you are unable to attend the Annual Meeting your shares may
nevertheless be voted.

<PAGE>
 
                            ALPHA INDUSTRIES, INC.
                                PROXY STATEMENT

                    FOR THE ANNUAL MEETING OF STOCKHOLDERS
                        TO BE HELD ON SEPTEMBER 8, 1997

This proxy statement is furnished in connection with the solicitation of proxies
by the Board of Directors of Alpha Industries, Inc., a Delaware corporation with
its executive offices at 20 Sylvan Road, Woburn, Massachusetts 01801 (the
"Company"), for use at the Annual Meeting of Stockholders to be held on Monday,
September 8, 1997, and at any adjournment or adjournments thereof (the
"Meeting"). The enclosed proxy relating to the Meeting is solicited on behalf of
the Board of Directors of the Company and the cost of such solicitation will be
borne by the Company. It is expected that this proxy statement and the
accompanying proxy will be mailed to stockholders on or about July 30, 1997.
Certain of the officers and regular employees of the Company may solicit proxies
by correspondence, telephone or in person, without extra compensation. The
Company may also pay to banks, brokers, nominees and certain other fiduciaries
their reasonable expenses incurred in forwarding proxy material to the
beneficial owners of securities held by them.

Only holders of Common Stock of the Company of record on its books at the close
of business on July 17, 1997 will be entitled to receive notice of, and to vote
at, the Meeting. As of such date, there were issued and outstanding 10,014,190
shares of Common Stock. Each stockholder is entitled to one vote for each share
of Common Stock and may vote such shares either in person or by proxy.

The enclosed proxy, if executed and returned, will be voted as directed on the
proxy or, in the absence of such direction, for the election of each of the
nominees as a director and for continuation of the Shareholder Rights Agreement.
If any other matters shall properly come before the Meeting, the enclosed proxy
will be voted by the proxies in accordance with their best judgment. The proxy
may be revoked at any time prior to exercise by filing with the Secretary of the
Company a written revocation, by executing a proxy with a later date, or by
attending in person and voting at the Meeting.


 
                                 PROPOSAL 1

                             ELECTION OF DIRECTORS

The Company's Certificate of Incorporation, as amended, and By-Laws, as amended,
provide for the division of the Board of Directors into three classes, each
having a three-year term of office. The term of one class expires each year. The
terms of three directors, Mr. Thomas C. Leonard, Mr. Arthur Pappas and Mr.
Raymond Shamie, expire at the Meeting. Mr. Leonard, Mr. Pappas and Mr. Shamie
have been renominated as Class 2 directors to hold office until the 2000 Annual
Meeting of Stockholders and until their successors have been duly elected and
qualified.

It is the intention of the persons named as proxies to vote for the election of
each of the three nominees as a Class 2 director. In the unanticipated event
that a nominee should be unable to serve, the persons named as proxies will vote
the proxy for such substitute, if any, as the present Board of Directors may
designate or to reduce the number of directors. The nominees have not been
nominated pursuant to any arrangement or understanding with any person.

The following table sets forth certain information with respect to the nominees,
including the year in which each nominee's term would expire, if elected, and
with respect to each of the two classes of directors whose terms will continue
after the Meeting.

The nominees for Class 2 director are indicated by asterisks.

                                       1

<PAGE>
 

<TABLE> 
<CAPTION> 
                                 Principal Occupation,                                                    Year Term
                                 Business Experience                                           Director    Expires
Name                       Age   and Other Directorships                                        Since     and Class
- ----                       ---   -----------------------                                       --------   ---------
<S>                        <C>   <C>                                                           <C>        <C> 
George S. Kariotis (1)..   74    Chairman of the Board and Director of the Company.              1962        1998
                                                                                                            Class 3
                                                                                                         
* Thomas C. Leonard (2).   62    President and Chief Executive Officer of the Company            1996        2000
                                                                                                            Class 2

* Arthur Pappas.........   61    Founder of: Datel Systems, Inc., a manufacturer of data         1988        2000
                                 conversion products, Power General Corporation, a                          Class 2
                                 manufacturer of switching power supplies, and Metra-Byte                
                                 Corporation, a manufacturer of measurement and control                  
                                 products for personal computers, President and Chairman of              
                                 Astrodyne Corp., a manufacturer of power supplies.                      
                                                                                                         
Martin J. Reid (3)......   56    Former President and Chief Executive Officer of the Company.    1985        1999
                                                                                                            Class 1
                                                                                                         
* Raymond Shamie (4)....   76    Former President, Shamie Management Corporation, an             1985        2000
                                 investment management and consulting company.                              Class 2
                                                                                                         
Sidney Topol (5)........   72    Director of: Scientific-Atlanta, Inc., a manufacturer of        1992        1999
                                 satellite communications and cable television equipment,                   Class 1
                                 Wandel and Golterman Technologies, Inc., a manufacturer of              
                                 test instruments, Public Broadcasting System, PrimeStar                 
                                 Partners, a direct-to-home satellite broadcaster; and                   
                                 President of The Topol Group, Inc., a consulting and                    
                                 investment company.                                                     
                                                                                                         
Charles A. Zraket (6)...   73    Trustee of the Mitretek Corporation, and Trustee of the         1995        1998
                                 Computer Museum in Boston.  Director of Concept Five                       Class 3
                                 Technologies Corp.
</TABLE>
 

(1)  Mr. Kariotis was Chairman of the Board and Chief Executive Officer from
1962 when the Company was founded until 1978. From 1979 to 1983, Mr. Kariotis
was the Secretary of Manpower Development and Economic Affairs for the
Commonwealth of Massachusetts. He was re-elected Chairman of the Board in 1983
and Chief Executive Officer in 1985. Mr. Kariotis resigned as Chief Executive
Officer in July 1986 while he campaigned for public office. He was re-elected
Chief Executive Officer in November 1986 and served in that capacity until 
May 1991.

(2) Mr. Leonard was elected President and Chief Executive Officer of the Company
in July 1996 and was elected a Director by a vote of the Board of Directors in 
August 1996. Mr. Leonard joined the Company in 1992 as General Manager of its 
Components and Subsystems Division. In 1994, he became the General Manager of 
Operations for the Alpha Microwave Division and was elected a Vice President. 
Mr. Leonard has over 30 years experience in the microwave industry, having held 
a variety of executive and senior level management and market positions at 
M/A-COM, Varian Associates and Sylvania.

(3)  Mr. Reid was President and Chief Executive Officer of the Company until
July 1996, when he resigned his officer positions and assumed a new role
advising the Company and the Board on business and strategic matters. From 1975
to 1981, Mr. Reid was a Vice President of the Company, and from 1981 to 1985 he
was a Senior Vice President of the Company. Mr. Reid was elected President and
Chief Operating Officer in 1985 and was elected acting Chief Executive Officer
in July 1986. Upon the return of Mr. Kariotis, he relinquished that position and
resumed his position as Chief Operating Officer in November 1986. Mr. Reid was
promoted to the position of Chief Executive Officer in 1991.

(4)  Mr. Shamie was President of Shamie Management Corporation from 1986 to
1995. Prior to 1986, Mr. Shamie was Chairman of the Board and Chief Executive
Officer of Metal Bellows Corporation.

(5)  Mr. Topol was President of Scientific-Atlanta, Inc. from 1971 to 1983,
Chief Executive Officer from 1975 to 1987 and Chairman of the Board from 1978 to
1990. Prior to 1971, Mr. Topol held various executive positions with Raytheon
Company.

(6)  From 1958 until 1990, Mr. Zraket was employed in various capacities, most
recently as President and Chief Executive Officer, by The MITRE Corporation.

                                       2

<PAGE>
 
Meetings of the Board of Directors

During the fiscal year ended March 30, 1997, the Board of Directors held four
meetings. Each director attended at least 75% of the aggregate number of
meetings of the Board of Directors and of committees of which they were members.

During the fiscal year ended March 30, 1997, the Audit Committee of the Board of
Directors, currently composed of Mr. Pappas, Mr. Reid and Mr. Zraket, held two
meetings. The functions performed by the Audit Committee included recommending
to the Board of Directors the engagement of the independent auditors, reviewing
the scope of the proposed audit, reviewing the scope of internal controls and
reviewing the implementation by management of recommendations made by the
independent auditors.

The Board of Directors also has a Compensation Committee, currently composed of
Mr. Topol, Mr. Reid and Mr. Shamie. The Compensation Committee held three
meetings during the fiscal year ended March 30, 1997. The functions of the
Compensation Committee included making recommendations to the Board of Directors
concerning executive compensation, incentive compensation and incentive plans
for key employees.

The Board of Directors does not have a nominating committee. Changes in
directors are considered by the Board of Directors as a whole.



Securities Beneficially Owned by Certain Persons

On July 17, 1997, there were 10,014,190 issued and outstanding shares of the
Common Stock of the Company.

The following table sets forth the beneficial holdings of the Company's Common
Stock as of July 17, 1997 of each of the directors of the Company, each of the
executive officers named under the heading "Executive Compensation," below, all
directors and executive officers as a group and each person known by the Company
to be the beneficial owner of 5% or more of the Company's Common Stock, based on
information received from or on behalf of the persons named. Unless noted
otherwise, the beneficial owners have sole voting and investment power with
respect to the shares listed.


<TABLE> 
<CAPTION> 
 
                                               Amount and Nature of
                                                Beneficial Ownership   Percent
      Name of Beneficial Owner                           (1)           of Class
      ------------------------                  --------------------   --------
      <S>                                       <C>                    <C>
      George S. Kariotis......................           4,825            (2)

      Arthur Pappas...........................           3,000            (2)

      Martin J. Reid..........................         244,977           2.4%

      Raymond Shamie..........................          15,000            (2)

      Sidney Topol............................          34,000            (2)

      Charles A. Zraket.......................          12,000            (2)

      Thomas C. Leonard.......................         106,993           1.1%

      David J. Aldrich........................          24,751            (2)

      Jean Pierre Gillard.....................          20,051            (2)

      Richard A. Langman......................              --            (2)

      Paul E. Vincent.........................          16,718            (2)

      James C. Nemiah.........................           1,145            (2)

      Executive Officers and Directors........         483,460           4.8%
         as a group (12 persons)
</TABLE>
 

                                       3

<PAGE>
 

<TABLE> 
<CAPTION> 
                                                        Amount and Nature of   Percent
      Name of Beneficial Owner                          Beneficial Ownership   of Class
      ------------------------                          --------------------   --------
      <S>                                               <C>                    <C> 
      Harvey Kaylie and Gloria W. Kaylie (3)...........      1,541,200           15.4%
         13 Neptune Avenue, Brooklyn NY 11235                                   
                                                                             
      The TCW Group, Inc.  (4).........................        556,500           5.6%
         865 S. Figueroa St., Los Angeles CA 90017                              
                                                                             
      Robert Day                                                                
         200 Park Ave., New York NY 10166                                       
                                                                             
      Travelers Group Inc., Smith Barney Holdings Inc..        529,700           5.3%
      Smith Barney Mutual Funds Management Inc. (5)                                 
         388 Greenwich St., New York NY 10013                                       
                                                                             
      Dimensional Fund Advisors Inc. (6)...............        518,883           5.2%
         1299 Ocean Ave., Santa Monica CA 90401
</TABLE>
 

(1)  Includes certain shares for each listed individual as follows: 
Kariotis -3,657 shares in his account under the Company's Savings and Retirement
Plan (hereafter referred to as the "S & R Plan"). Pappas - 3,000 shares subject
to currently exercisable stock options. Reid - 9,037 shares held by his wife,
26,142 shares held jointly with his wife, 7,305 shares in his account under the
S & R Plan and 188,000 shares subject to currently exercisable stock options.
Shamie - 3,000 shares subject to currently exercisable stock options. Topol -
3,000 shares subject to currently exercisable stock options. Zraket - 2,000
shares subject to currently exercisable stock options. Leonard - 6,557 shares
held jointly with his wife, 1,124 shares in his account under the S & R Plan and
85,000 shares subject to currently exercisable stock options. Aldrich - 751
shares in his account under the S & R Plan and 19,000 shares subject to
currently exercisable stock options. Gillard - 830 shares in his account under
the S & R Plan and 10,332 shares subject to currently exercisable stock options.
Vincent - 5,250 shares held jointly with his wife, 2,068 shares in his account
under the S & R Plan and 6,400 shares subject to currently exercisable stock
options. Nemiah - 345 shares in his account under the S & R Plan and 800 shares
subject to currently exercisable stock options. Executive Officers and Directors
as a Group - 16,080 shares in certain officers under the S & R Plan as to which
such officers have voting power and 320,532 shares subject to currently
exercisable stock options.

(2)  Less than one percent.

(3)  As reported in a Schedule 13D, as amended, dated September 19, 1990,
Scientific Components Corporation ("Scientific"), as of September 19, 1990, was
the record and beneficial owner of 1,508,300 shares of the Company's Common
Stock, and the pension and profit sharing plans of Scientific were the record
and beneficial owners of 32,900 shares. Harvey Kaylie and his wife, Gloria W.
Kaylie, are each directors, officers and principal stockholders of Scientific
and trustees of the pension and profit sharing plans, and may be deemed to be
the beneficial owners of the shares held of record by Scientific and its pension
and profit sharing plans. Mr. and Mrs. Kaylie have shared power to vote and
dispose of all of the aforementioned shares. See "CERTAIN RELATIONSHIPS AND
RELATED TRANSACTIONS."

(4)  As reported in a Schedule 13G dated February 12, 1997.

(5)  As reported in a Schedule 13G dated February 5, 1997, in which Smith Barney
Mutual Funds Management claimed shared voting and dispositive power in 528,500
shares, and Smith Barney Holdings Inc. and Travelers Group Inc. both claimed
shared voting and dispositive power in 529,700 shares. All three entities
disclaimed beneficial ownership in any of the shares reported in the filing.

(6)  As reported in a Schedule 13G dated February 5, 1997, in which Dimensional
Fund Advisors Inc. (DFAI) claimed sole voting power as to 335,283 shares and
stated that certain of its officers also serve as officers of DFA Investment
Dimensions Group Inc. and the DFA Investment Trust Company and in such other
capacities have power to vote an additional 183,600 shares of the Company. DFAI
stated that all 518,883 shares are owned by clients of DFAI, none of whom is
known to DFAI to own more than 5% of the class.

                                       4

<PAGE>
 

Executive Compensation

The following Summary Compensation Table sets forth the compensation of the
Chief Executive Officer and each of the four most highly compensated executive
officers of the Company for each of the Company's last three fiscal years.
Information with respect to certain of the executive officers does not appear
for all three fiscal years because such officers were not executive officers
during all such fiscal years. All of the executive officers listed in the Table
are collectively referred to as the "Named Executive Officers".


<TABLE> 
<CAPTION> 
                                       Summary Compensation Table
                                        Annual Compensation      Long-Term Compensation 
                                                                         Awards
                                                                Securities    Long-Term 
Name and                      Fiscal               Incentive    Underlying    Incentive     All Other
Principal                      Year               Compensation   Options     Plan Payouts  Compensation
Position                      Ended    Salary($)     ($)(1)       ($)(2)         ($)          ($)(3)
- -----------------------     ---------  ---------  ------------  -----------  ------------  ------------
<S>                         <C>        <C>        <C>           <C>          <C>           <C>  
Thomas C. Leonard            3/30/97   $216,923            --       50,000            --        $6,347
President,                   3/31/96    160,577            --           --            --         1,633
Chief Executive Officer      4/2/95     146,577       $15,000           --            --           888 
                                                                                            
David J. Aldrich (4)         3/30/97   $166,538            --       10,000            --            --
Vice President,              3/31/96    135,577            --       35,000            --        $1,883
General Manager of Alpha     4/2/95      10,000            --       30,000            --            29 
Microwave                                                                                   
                                                                                            
Paul E. Vincent (5)          3/30/97   $107,530            --       24,000            --          $260
Vice President, Treasurer,   3/31/96         --            --           --            --            --
Chief Financial Officer      4/2/95          --            --           --            --            -- 
                                                                                            
Jean Pierre Gillard (6)      3/30/97   $148,293            --       20,000            --            --
Vice President               3/31/96         --            --           --            --            --
                             4/2/95          --            --           --            --            -- 
                                                                                            
James C. Nemiah (7)          3/30/97   $107,728            --        4,000            --            --
Secretary,                   3/31/96         --            --           --            --            --
Corporate Counsel            4/2/95          --            --           --            --            -- 
</TABLE>
 
- -----------------------------

(1)  Payments to the Named Executive Officers under the Alpha Incentive
     Compensation Program is based on a system of incentive compensation for
     superior performance as determined by the Compensation Committee.

(2)  Options granted under the 1986 Long-Term Incentive Plan and the 1996
     Long-Term Incentive Plan (the "Option Plans").

(3)  Represents premiums paid by the Company for various term life and whole
     life insurance policies for the Named Executive Officers and the Company's
     contributions in fiscal 1995 to the employee's account under the Company's
     401(k) plan that was merged with the Company's ESOP into the S & R Plan 
     at March 31, 1995. The Company's contribution to the S & R Plan for fiscal
     1997 was accrued and included above, but was not distributed until fiscal
     1998.
                                        5

<PAGE>
 
(4)     Mr. Aldrich joined the Company and became an executive officer on
        February 27, 1995.

(5)     Mr. Vincent became an executive officer of the Company on 
        January 28, 1997.

(6)     Mr. Gillard became an executive officer of the Company on June 27, 1996.

(7)     Mr. Nemiah joined the Company on November 21, 1995 and became an
        executive officer of the Company on September 9, 1996.


The following table sets forth certain information with respect to option grants
to the Named Executive Officers during the fiscal year ended March 30, 1997.

<TABLE> 
<CAPTION> 

                                              Option Grants in Last Fiscal Year
                                                     Individual Grants
                                -------------------------------------------------------------
                                Number of                                                           Potential Realizable
                                Securities        % of Total                                          Value at Assumed
                                Underlying          Options          Exercise                       Annual Rates of Stock
                                 Options          Granted to          or Base                       Price Appreciation for
                                 Granted         Employees in          Price       Expiration           Option Term (2)
Name                             (#)(1)           Fiscal Year         ($/Sh)          Date            5%              10%
                                ---------        -------------       --------      ----------         --              ---
<S>                             <C>              <C>                 <C>           <C>                <C>             <C> 
Thomas C. Leonard ......          50,000             8.4%              $7.63          8/6/06          239,923         608,013
David J. Aldrich (3) ...          35,000             5.9%              $9.38         6/14/06          198,102         502,029
                                  10,000             1.7%              $7.75        11/26/06           48,739         123,515
Paul E. Vincent ........          4,000              0.7%              $9.38         6/14/06           23,596          59,797
                                  20,000             3.4%              $7.00         2/13/07           88,045         223,124
Jean Pierre Gillard ....          20,000             3.4%              $9.38         6/14/06          117,981         298,986
James C. Nemiah ........          4,000              0.7%              $9.38         6/14/06           23,596          59,797
</TABLE>
 
(1)     The options were granted under the Option Plans, and are subject to a
        vesting schedule pursuant to which, in general, the options become
        exercisable at a rate of 20% per year commencing one year after the date
        of grant provided the holder of the option remains employed by the
        Company. Options may not be exercised beyond 90 days after the holder
        ceases to be employed by the Company, except in the event of termination
        by reason of death, retirement or permanent disability, in which event
        the option may be exercised for up to one year following termination.

(2)     The assumed rates are compounded annually for the full term of the
        options.
        
(3)     A grant to Mr. Aldrich early in the 1997 fiscal year of options to Mr.
        Aldrich to purchase 35,000 shares of Common Stock at an exercise price
        of $9.375 per share was reported in the 1996 Proxy Statement. That grant
        is included in this table.

                                       6

<PAGE>
 
The following table sets forth certain information with respect to the exercise
of options and the aggregated number and value of options exercisable and
unexercisable by the Named Executive Officers as of March 30, 1997.

                 Aggregated Option Exercises in Last Fiscal Year
                        and Fiscal Year End Option Values

<TABLE> 
<CAPTION>                                                         
                                                                   Number of Securities                                    
                                                                        Underlying                  Value of Unexercised   
                                                                  Unexercised Options at           In-The-Money Options at 
                                    Shares                        March 30, 1997 (#)(1)             March 30, 1997 ($)(1) 
                                  Acquired on     Value           ----------------------            ----------------------  
                                   Exercise      Realized         
                                     (#)            ($)        Exercisable    Unexercisable      Exercisable     Unexercisable
                                  ----------    ----------     -----------    -------------      -----------     -------------
<S>                               <C>           <C>            <C>            <C>                <C>             <C>  
Thomas C. Leonard............           --             --          68,000           57,000         $253,000           $24,500
David J. Aldrich.............           --             --          10,000           65,000               --                --
Paul E. Vincent..............        2,000        $12,026           5,300           25,200          $18,750           $18,750
Jean Pierre Gillard..........           --             --           2,333           38,001           $6,999           $25,876
James C. Nemiah..............           --             --              --            5,500               --                --
</TABLE>
 

(1)    The options were granted under the Option Plans. See Note 1 to the
       previous table.

Long-Term Compensation Plan

The Company's Long-Term Compensation Plan (the "Long-Term Compensation Plan") is
a non-qualified supplemental executive retirement plan (SERP) providing deferred
compensation for senior executives designated by the Compensation Committee. The
following table illustrates the approximate level of benefits payable to a
participant under the Long-Term Compensation Plan who retires at age 65 and
receives his or her benefit in the form of a single life annuity. The amounts
shown do not reflect any reduction for Offset Amounts, as defined below.


<TABLE> 
<CAPTION> 
                              Pension Plan Table

   Highest 12 Months                      Years of Service
    Base Pay During       ------------------------------------------------
    Final 36 Months          1           5           10         15 or more
    ---------------       ------      -------      -------      ----------
    <S>                   <C>         <C>          <C>          <C> 
       $100,000           $3,333      $16,667      $33,333      $  50,000
       $150,000           $5,000      $25,000      $50,000      $  75,000
       $200,000           $6,667      $33,333      $66,667       $100,000
       $250,000           $8,333      $41,667      $83,333       $125,000
</TABLE>
 

The benefit payable under the Long-Term Compensation Plan is based upon a
straight life annuity beginning at age 65 equal to 50% of a participant's
regular base pay during the highest 12 consecutive months within the 36 month
period immediately preceding the participant's retirement. The benefit is
ratably reduced if the participant retires with less than 15 Years of Service as
a full time employee following October 1, 1990 or retires prior to age 65. The
cash benefit payable to a participant is offset by the sum of (i) certain
matching Company contributions to the S & R Plan and (ii) 50% of the value of an
annuity which could be purchased using the gain from exercised stock options or,
in certain cases, stock options which are then exercisable, which have been
designated by the Compensation Committee as options to be offset (the "Offset
Amounts"). The cash benefit is not subject to offset for social security
benefits.

If a participant elects to retire before age 65 and to begin receiving benefits
immediately, or if a participant elects a joint and survivor benefit, the amount
of the benefit is actuarially adjusted. Alternatively, the participant may elect
to take a lump sum distribution of an actuarially equivalent amount. If a
participant dies prior to retirement, his or her beneficiary is entitled to a
ten year annuity at a rate equal to 25% of the participant's base pay, less the
value of the Offset Amounts. 

                                       7

<PAGE>
 
During the fiscal year ended March 30, 1997, Mr. Leonard participated in the
Long-Term Compensation. The compensation amount that would have been included in
base compensation for purposes of calculating the benefit under the Long-Term
Compensation Plan for Mr. Leonard was $216,923. At year end, Mr. Leonard had two
Years of Service under the Long-Term Compensation Plan.

Executive Compensation Plan

The Company's Executive Compensation Plan (the "Executive Compensation Plan") is
an unfunded, non-qualified deferred compensation plan for the purpose of
providing deferred compensation for selected management employees. Participants
may elect to defer a portion of their compensation, and the Company, in its sole
discretion, may make additional contributions to the account of a participant on
such terms as the Company specifies. All deferred amounts are held in a trust.
Participants defer recognizing taxable income on the amount held for their
benefit until the amounts are paid.

A participant elects the date at which the deferrals and vested Company
contributions will be paid to the participant. Special rules are provided for
distributions in the case of a participant's death or disability, a change in
control of the Company, early retirement, or in the event of unforeseen
emergencies, all as defined in the Executive Compensation Plan. During the
fiscal year ended March 30, 1997, Mr. Leonard and Mr. Aldrich participated in
the Executive Compensation Plan. The Company did not make any discretionary
contributions to their accounts for fiscal 1997.

Employment Agreements

The Company has Severance Agreements with each the Named Executive Officers,
under which they are entitled to receive various benefits in the event that they
are terminated under specified circumstances.

If Mr. Leonard is terminated or quits within two years after a change in control
of the Company, he will receive a lump sum payment equal to two times his annual
salary. If he is terminated without cause or quits for good reason at any other
time, he will receive two years of salary continuation. In all such cases, all
of his stock options will vest immediately. If Mr. Leonard retires within twelve
months after September 30, 1999, the Company will enter into a two year
consulting arrangement with him at a consulting fee equal to his salary and all
of his stock options will vest immediately. The term of Mr. Leonard's severance
agreement is indefinite.

If Mr. Aldrich is terminated or quits within two years after a change in control
of the Company, he will receive two years of salary continuation. If he is
terminated without cause at any other time, he will receive one year of salary
continuation. In all such cases, all of his stock options will vest immediately.
The term of Mr. Aldrich's agreement is indefinite.

If Mr. Gillard is terminated or quits within two years after a change in control
of the Company, he will receive two years of salary continuation. If he is
terminated without cause at any other time, he will receive two years of salary
continuation. In all such cases, all of his stock options will vest immediately.
Mr. Gillard's agreement expires on April 30, 1998.

If Mr. Vincent or Mr. Nemiah is terminated within one year after a change in
control of the Company, he will receive one year of salary continuation. The
agreements of Mr. Vincent and Mr. Nemiah expire on August 22, 1998.

Compensation of Directors

Directors who are not employees of the Company are paid a quarterly retainer of
$2,125 plus an additional $1,000 for each full-day meeting (including committee
meetings) attended. Directors who are committee chairmen receive an additional
quarterly retainer of $250. In addition, each new non-employee director receives
an option to acquire 5,000 shares of Common Stock immediately following the
Company's Annual Meeting of Stockholders at which said director is first elected
by the stockholders or which first follows his appointment by the Board of
Directors.

                                       8

<PAGE>
 
In August 1992, the Company entered into a consulting arrangement with Mr. Topol
pursuant to which Mr. Topol will provide consulting services to the Company in
return for a fee of $7,000 per quarter.

C
ompensation Committee Interlocks and Insider Participation

The Compensation Committee of the Board of Directors consists of Mr. Topol, Mr.
Shamie and Mr. Reid. Except for Mr. Reid, who was the President and CEO, and is
still an employee, of the Company, no member of the Compensation Committee is a
former or current officer or employee of the Company or any of its subsidiaries.
See "Compensation Committee Report on Executive Compensation."

Compensation Committee Report on Executive Compensation

The Compensation Committee of the Board of Directors is responsible for
developing and making recommendations to the Company with respect to policies
for executive officer compensation. The Compensation Committee determines the
compensation to be paid to the Chief Executive Officer and each of the other
executive officers of the Company.

In the past, the Company has entered into multi-year employment agreements with
its executives, which provided the executive a specified salary and position and
participation in specified executive benefit plans, as well as providing for
salary continuation in the event of termination after a change in control or
termination without cause. The Committee has now put in place severance
agreements for the executives, which do not guarantee salary, position or
benefits, but simply provide salary continuation in the event of a termination
after a change in control or termination without cause.

The objective of the Compensation Committee in determining the type and amount
of executive compensation is to provide a level of compensation that allows the
Company to attract and retain superior talent, to achieve its business
objectives, and to align the financial interests of the executive officers with
the stockholders of the Company. The elements of compensation for the executives
are base salary, short-term cash incentives, long-term stock-based incentives,
and retirement plans.

Compensation for the Company's Chief Executive Officer and the other executives,
including salary and short and long-term incentives, is established at levels
that are competitive with the compensation of comparable executives in similar
companies. The Committee periodically utilizes studies from Watson Wyatt
Worldwide and other compensation experts on executive compensation in comparable
high technology and manufacturing companies, especially those located in the
Greater Boston area and the east coast of the United States. Based on these
studies, the Committee establishes base salaries, expected short-term incentive
compensation and long-term incentive compensation so as to set the combined
value at or near the median of the range indicated by the study. In establishing
individual compensation, the Committee also considers the individual experience
and performance of the executive, as well as the performance of the Company. The
Compensation Committee also relies on the recommendations of the Chief Executive
Officer for determining the salaries for the other executives.

Short-term incentive compensation for each executive is established annually by
the Committee, by tying a percentage of each executive's total cash compensation
to the accomplishment of specific financial objectives for the Company and for
each division. A comparable program is established annually by management for
non-executive employees with significant responsibility for results. Because
Company financial results for fiscal 1997 were below the lowest threshold
established for payment of incentive compensation to the executives, no cash
incentive compensation will be paid to any executive with respect to fiscal
1997. See "Summary Compensation Table", above.

Long-term, stock-based incentive compensation has been provided under the 1986
Long-Term Incentive Plan (the "1986 Plan") and the 1996 Long-Term Incentive Plan
(the "1996 Plan") (collectively, the "Option Plans"). The 1986 Plan expired in
December 1996, and the 1996 Plan was approved by the Company's stockholders in
September 1996. Under the Option Plans, the Committee has, in the past, awarded
nonqualified stock options, incentive stock options and restricted stock awards.
Restricted stock awards involve the issuance of shares of Common Stock which may
not be transferred or otherwise encumbered, subject to certain exceptions, for
varying amounts of time, and which will be forfeited, in whole or in part if the

                                       9

<PAGE>
 
employee leaves the Company. Options and restricted share awards provide a
method of tying the value of the executive's compensation to the value of the
Company's stock.

The Company also permits executives and other employees to purchase Company
stock through the Employee Stock Purchase Plan at a discount. Under the S & R
Plan, the Company can also match a portion of the contributions of executives
and other employees with grants of Company stock.

The stock ownership afforded under the Option Plans, the Stock Purchase Plan and
the S & R Plan allows executives to acquire a significant, long-term stock
ownership position in the Company, which serves to align the executives'
interests with stockholders' interests.

The final component of executive compensation provides executives with deferred
income. Executives designated by the Compensation Committee participate in the
Long-Term Compensation Plan and the Executive Compensation Plan which are
discussed under "Long-Term Compensation Plan" and "Executive Compensation Plan"
above. Executives may also participate in the S & R Plan.

Report Submitted By: Compensation Committee - Sidney Topol, Raymond Shamie and
Martin J. Reid

Performance Graph

The following graph shows the yearly change in the Company's cumulative total
stockholder return for fiscal years ended March 28, 1993, April 3, 1994, April
2, 1995, March 31, 1996 and March 30, 1997, based upon the market price of the
Company's Common Stock, compared with: (i) the cumulative total return on the
Standard & Poor's 500 Index and (ii) the Standard & Poor's Technology 500 Index.

<TABLE> 
<CAPTION> 
                                                   COMPARISON OF CUMULATIVE TOTAL RETURN
                                                Data Provided in Lieu of "Performance Graph"

                                 FY92          FY93           FY94           FY95          FY96           FY97
                                 ----          ----           ----           ----          ----           ----
     <S>                         <C>          <C>            <C>            <C>           <C>            <C>    
     Alpha Industries            100          121.05         131.58         473.68        365.77         257.89

     S&P Tech 500                100          109.88         129.24         163.55        220.81         298.51

     S&P 500                     100          115.23         116.93         135.13        178.51         213.89
</TABLE>
 

The above graph assumes a total initial investment of $100 as of March 29, 1992,
and shows a "Total Return" that assumes reinvestment of dividends and is based
on market capitalization at the beginning of each period.

                                       10

<PAGE>
 
 
                                 PROPOSAL 2

                     APPROVAL OF THE ALPHA INDUSTRIES, INC.
                          SHAREHOLDER RIGHTS AGREEMENT

Adoption of the New Shareholder Rights Agreement in December 1996

The Board of Directors unanimously adopted a new Shareholder Rights Agreement
(together with related documents, the "Rights Agreement") on December 5, 1996,
and declared a dividend distribution to all stockholders of one Purchase Right
(the "Rights") for each outstanding share of the Company's Common Stock. The
Board considers the Rights to be the best available means of protecting both the
stockholders' right to retain their equity investment in the Company and the
full value of that investment, while not foreclosing a fair acquisition bid for
the Company. A fuller explanation of the Board's reasons for taking these
actions is set out below under "The Board's Reasons for Adopting the Rights
Agreement."

The Board believes that the Rights Agreement is of such importance to the
stockholders that it decided to present the case for the Rights Agreement to a
vote of the Company's stockholders. The Rights Agreement and the Rights will
continue in effect only if the Rights Agreement is approved by an affirmative
vote of the holders of a majority of the Common Stock present or represented at
the Meeting and entitled to vote. A vote for (or against) the Rights Agreement
will also constitute a vote for (or against) the Rights.

The Company has had a Shareholder Rights Agreement since November, 1986, when
the Board of Directors declared a dividend of Stock Purchase Rights. The
original Shareholder Rights Agreement, as amended, was in effect at the time
that another company attempted to purchase The Company in 1992 for $4.50 per
share. The original Shareholder Rights Agreement had a life span of ten years
and was set to expire in December of 1996.

Faced with the prospect of having no Shareholder Rights Agreement in place, the
Board reviewed the Company's available protections against the risk that an
unsolicited takeover attempt might win control of the Company even if the Board
was convinced that the offer was too low or unfair, thereby depriving the
Company's stockholders of the opportunity to benefit from either a higher offer
or from future increases in the value of the Company's stock if the Company
remained independent. Based on the advice of the Company's outside lawyers, the
Board concluded that the Company's exposure to this potential risk was
unacceptable and decided to adopt the Rights Agreement, which is substantially
similar to the former plan.

Description of the Rights.

The Rights will be exercisable only if: (i) a person or group acquires 10% or
more of the Company's Common Stock, or (ii) announces a tender offer the
consummation of which would result in ownership by a person or group of 10% or
more of the Common Stock, or (iii) if a person who owned more than 10% of the
Company's Common Stock as of the date on which the Rights were distributed
purchases any additional shares. Ten days after any of those events occurs, each
Right will entitle stockholders to buy one share of Common Stock at an exercise
price of $40.00.

In addition, if a person or group does acquire 10% or more of the Company's
outstanding Common Stock (whether through tender offer or otherwise), each Right
will entitle its holder (other than the acquiring person or group) to purchase,
at the Right's then-current exercise price, a number of shares of The Company's
Common Stock having a market value equal to twice that exercise price.

If the Company is acquired in a merger or other business combination transaction
after a person has acquired 10% or more of the Company's outstanding Common
Stock, each Right will entitle its holder to purchase, at the Right's
then-current exercise price, a number of the acquiring company's common shares
having a market value of twice that exercise price.

                                       11

<PAGE>
 
Following the acquisition by a person or group of beneficial ownership of 10% or
more of the Company's Common Stock and prior to an acquisition of 50% or more of
the Common Stock, the Board of Directors may exchange the Rights (other than
Rights owned by the acquiring person or group), in whole or in part, at an
exchange ratio of one share of Common Stock per Right.

Prior to the acquisition by a person or group of beneficial ownership of 10% or
more of the Company's Common Stock, the Rights are terminable at the option of
the Board of Directors.

The Rights are intended to enable all of the Company's stockholders to realize
the long-term value of their investment in the Company. They will not prevent a
takeover, but should encourage anyone seeking to acquire the Company to
negotiate with the Board prior to attempting a takeover.

The dividend distribution was paid on December 5, 1996 to stockholders of record
on December 5, 1996. The Rights will expire on December 5, 2006, unless earlier
terminated. The Rights distribution is not taxable to stockholders.

A Summary of the Rights is attached to this Proxy Statement as Exhibit A.

The Decision to Put the Rights Agreement to a Shareholder Vote.

The Board of Directors of the Company has the full power, under Delaware law and
the Company's Certificate of Incorporation and By-Laws, to adopt the Rights
Agreement without a vote by stockholders. In fact, the Board is not aware of any
other instance in the United States where a public company has put a shareholder
rights agreement to a binding vote of its stockholders.

The Board, based on its review of the usefulness of shareholder rights
agreements, firmly believes that the Rights Agreement should continue in effect
and that the Company's stockholders will realize the greatest benefit if it
does. Nonetheless, the Board felt strongly that the stockholders should be
offered the opportunity to make their own decision about the Rights Agreement.

The Board's Reasons for Adopting the Rights Agreement.

The Board is committed to creating shareholder value. Under the right
circumstances, stockholders may realize the greatest value by selling their
stock to an acquiror of the Company. However, there is always a risk that a
particular acquisition offer will not offer stockholders the best value. The
Rights Agreement is designed to make it more likely that any such acquiror will
negotiate with the Board of Directors, who are obligated to protect the
interests of all of the stockholders.

An acquiror may offer a price that does not reflect the full long-term value of
the Company. The Rights Agreement will ensure that any such offer is measured
against the Board's fully-informed opinion as to the true value of the Company.

An acquiror may structure its offer in such a way as to coerce stockholders into
accepting an inadequate price for fear of receiving even less later. An example
is the now-classic "two tier tender offer", which offers one price for the first
51% of the shares tendered and a lower or less desirable payment for the
remaining 49%. Another example is the "partial tender offer", in which the
offeror wants to buy only a part of the Company, but a large enough part to gain
effective control. In both of these cases, some stockholders will suffer. The
Rights Agreement will allow the Board to require that any acquiror treat all
stockholders equally and equitably.

An acquiror may accumulate a large block of the Company's stock, without paying
a premium, and may use that block to influence or control the affairs of the
Company to the detriment of the other stockholders or to acquire the Company at
an unfair price. The Rights Agreement will prevent anyone from utilizing this
back-door method.

                                       12

<PAGE>
 
The Board of Directors is aware that arguments have been advanced that
securities like the Rights may deter legitimate acquisition proposals. The Board
has considered these views and concluded that those arguments are speculative
and do not justify leaving the Company and its stockholders without any
protection against unfair treatment by an acquiror. The Board believes that the
Rights and the Rights Agreement represent a sound and reasonable means of
addressing the complex issues of corporate policy created by the risk of an
unfair takeover attempt.

More than 1,400 U.S. and Canadian companies have adopted shareholder rights
agreements to protect their stockholders, including over 55% of the Fortune 500
companies.

The Supreme Court of Delaware has upheld the legality of shareholder rights
agreements, ruling that the adoption of a shareholder rights agreement under
appropriate circumstances is a legitimate exercise of the board's business
judgment in that it helps a board to better fulfill its fiduciary obligations to
the stockholders it serves. Without the Rights Agreement, in the event of an
unsolicited takeover attempt, your Board may not have sufficient time to act
effectively to maximize the value of the stockholders' investment.

The Board of Directors and management are not aware of any pending or presently
threatened efforts to obtain control of the Company. However, in the Board's
opinion, that fact does not justify leaving the Company's stockholders without
the protection of the Rights Agreement.

What the Rights Agreement Will Do, and What It Won't Do

The Rights Agreement will make it more likely that any party interested in
acquiring the Company will approach and negotiate with the Board of Directors.
The Rights Agreement will give the Board the time to evaluate any such offer to
determine if it is fair and reflects the full value of the Company. If an offer
is not satisfactory, the Rights Agreement will give the Board the time and
opportunity to seek other, better offers or to negotiate for an improvement of
the original offer.

The Rights Agreement is not intended to prevent, and should not prevent,
properly priced, fair offers for all of the Company's shares. Nor should it
prevent proxy contests for control of, or seats on, the Board of Directors.

The Rights Agreement will not relieve the Board of its fiduciary obligation to
consider in good faith any proposal to acquire the Company, nor does it allow
the Board to act against the stockholders' interests for the purpose of
entrenching management. The law requires the Board to make all decisions in good
faith and act in the best interest of all of the Company's stockholders. Your
Board, in accordance with its fiduciary obligations and the law, will represent
all of the stockholders when and if a decision is to be made in the context of a
particular proposal.

The Rights Agreement has not resulted in any change in the corporate structure
of the Company, nor has it weakened its financial strength or interfered with
its business plans. The issuance of the Rights has no dilutive effect, will not
affect reported earnings per share, and will not change the way that
stockholders can trade the Common Stock. The Rights should not interfere with
any merger or other business combination approved by the Board of Directors
prior to the Rights becoming exercisable, since prior to such an event, the
Rights may be redeemed by the Company at $.01 per Right (a total of
approximately $100,000 based on the shares of Common Stock outstanding on the
record date for the Annual Meeting).

Certain Effects of the Rights.

The Rights Agreement is intended by the Board of Directors to encourage persons
seeking to acquire control of the Company to initiate such an acquisition
through arms' length negotiations with the Company's management and the Board of
Directors. However, the Rights Agreement could also have the effect of
discouraging a third party from making a tender offer or otherwise attempting to
obtain control of the Company, even though such an attempt might be beneficial
to the Company and its stockholders. In particular, the Rights Agreement may
discourage a party from seeking to acquire the Company on account of 

                                       13

<PAGE>
 
the substantial dilution to which an acquiror is potentially exposed in the
event the Board of Directors of the Company does not redeem the Rights.

In addition, since the Rights Agreement is designed to discourage accumulations
of large blocks of the Company's stock by purchasers whose objective is to have
such stock repurchased by the Company or a third party at a premium, adoption of
the Rights Agreement could tend to reduce temporary fluctuations in the market
price of the Company's stock which are caused by accumulations of large blocks
of stock. Accordingly, stockholders could be deprived of certain opportunities
to sell their stock at a temporarily high market price. Takeovers or changes in
management of the Company that are proposed and effected without prior
consultation and negotiation with the Company's management are not necessarily
detrimental to the Company and its stockholders. However, the Board believes
that the benefits of protecting the Board's ability to negotiate with the
proponent of an unfriendly or unsolicited proposal to takeover or restructure
the Company outweigh the disadvantages of discouraging such proposals.

Other Provisions Potentially Affecting a Change in Control of the Company

Apart from the Rights Agreement, there are provisions under the Company's
Certificate of Incorporation that could render more difficult or discourage an
attempt to obtain control of the Company, including: staggered election of
Directors; no action by stockholders without a meeting; special meetings of the
stockholders may only be called by the Chairman or the President; the
requirement that holders of 80% of the Company's voting stock approve certain
mergers, consolidations, asset sales, leases and other transactions involving a
person (or an affiliate of a person) who beneficially owns, directly or
indirectly, 5% or more of the Company's shares entitled to vote in the election
of Directors; and the requirement that holders of 90% of the Company's voting
stock approve certain mergers, consolidations, asset sales, leases and other
transactions involving a person (or an affiliate of a person) who beneficially
owns, directly or indirectly, 20% or more of the Company's shares entitled to
vote in the election of Directors.

In addition, Section 203 of the Delaware General Corporation Law prohibits the
Company from engaging in certain business combinations with any interested
stockholder (which, subject to certain exceptions, includes any person who
together with such person's affiliates and associates owns 15% or more of the
outstanding voting stock of the Company) for a period of three years following
the date that such stockholder became an interested stockholder, unless (i)
prior to such date the Board of Directors has approved the business combination
or the transaction which resulted in the stockholder becoming an interested
stockholder, (ii) upon consummation of the transaction which resulted in the
stockholder becoming an interested stockholder, the stockholder and his
affiliates and associates owned at least 85% of the voting stock of the Company
(excluding certain management and employee plan shares), or (iii) the business
combination is approved by the Board and authorized by an affirmative vote of at
least 66 2/3% of the outstanding voting stock which is not owned by the
interested stockholder or his affiliates or associates..

The Board of Directors considered these provisions in adopting the Rights
Agreement and concluded that the Rights Agreement would provide significant
additional protection to the stockholders of the Company against abusive
takeover tactics.

Recommendation

As described above, the Board of Directors believes that the outstanding Rights
provide the Board with an instrument which may be important to protect against
inadequate acquisition proposals and to maximize the future value of the
Company's stock. ACCORDINGLY, THE BOARD OF DIRECTORS RECOMMENDS THAT THE
S
TOCKHOLDERS VOTE "FOR" THE PROPOSED APPROVAL OF THE SHAREHOLDER RIGHTS
AGREEMENT.

                                       14

<PAGE>
 

                CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Scientific Components Corporation, currently the record holder of 15.4% of the
Company's Common Stock, is a customer of the Company. During the fiscal year
ended March 30, 1997, Scientific Components Corporation purchased approximately
$5.1 million of the Company's products in the ordinary course of business.
During the fiscal year ended March 30, 1997, Scientific Atlanta, Inc., of which
Mr. Topol is a Director and former Chairman, CEO and President, purchased
approximately $1.0 million of the Company's products in the ordinary course of
business. See "PROPOSAL 1 - ELECTION OF DIRECTORS - Securities Beneficially
Owned by Certain Persons".


 
                             OTHER PROPOSED ACTION

As of the date hereof, the management of the Company knows of no business to
come before the Meeting other than the election of directors and the approval of
the Shareholder Rights Agreement. However, if any other business should properly
be presented to the Meeting, the proxies will be voted in respect thereof in
accordance with the judgment of the person or persons holding the proxies.


                                  OTHER MATTERS

Voting Procedures

The votes of stockholders present in person or represented by proxy at the
Meeting will be tabulated by an inspector of elections appointed by the Company.
The three nominees for director of the Company who receive the greatest number
of votes cast by stockholders present in person or represented by proxy at the
Meeting and entitled to vote thereon will be elected directors of the Company.
The affirmative vote of a majority of the shares of Common Stock present in
person or represented by proxy and entitled to vote at the meeting is required
for the approval of Proposal 2.

Abstentions will have no effect on the outcome of the vote for the election of
directors, but will have the effect of being cast against the proposal to
approve the Rights Agreement even though the stockholders so abstaining intends
a different interpretation. Shares of Common Stock held of record by brokers who
do not return a signed and dated proxy will not be considered present at the
Meeting, will not be counted towards a quorum and will not be voted in the
election of directors or on the proposal to approve the Rights Agreement.

Relationship With Independent Public Accountants

The Board of Directors has appointed KPMG Peat Marwick LLP as the independent
certified public accountants to audit the consolidated financial statements of
the Company for the fiscal year ending March 31, 1998. Such firm and its
predecessors have served continuously in that capacity since 1974.

A representative of KPMG Peat Marwick LLP will be present at the Meeting and
will be afforded the opportunity to make a statement if he or she desires to do
so. Such representative is expected to be available to respond to appropriate
questions.

Incorporation By Reference

To the extent that this Proxy Statement has been or will be specifically
incorporated by reference into any filing by the Company under the Securities
Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, the
sections of the Proxy Statement entitled "Compensation Committee Report on
Executive Compensation" and "Performance Graph" shall not be deemed to be so
incorporated, unless specifically otherwise provided in any such filing.

                                       15

<PAGE>
 
Annual Report On Form 10-K

Copies of the Company's Annual Report on Form 10-K for the fiscal year ended
March 30, 1997 as filed with the Securities and Exchange Commission are
available to stockholders without charge upon written request addressed to
Investor Relations, Alpha Industries, Inc. , 20 Sylvan Road, Woburn,
Massachusetts 01801.

Stockholder Proposals

Proposals which stockholders wish to include in the Company's proxy materials
relating to its 1998 Annual Meeting of Stockholders must be received by the
Company no later than April 2, 1998.

                                       16

<PAGE>
 
                                                                       EXHIBIT A
                            DESCRIPTION OF THE RIGHTS

Pursuant to a Shareholder Rights Agreement (the "Rights Agreement") dated as of
December 5, 1996, entered into between Alpha Industries, Inc., a Delaware
corporation (the "Company") and American Stock Transfer & Trust Company, as
Rights Agent (the "Rights Agent"), on December 4, 1996, the Board of Directors
of the Company, declared a dividend payable at the close of business on December
5, 1996 of one right (a "Right") for each outstanding share of Common Stock, par
value $.25 per share (the "Common Stock"), of the Company held of record on
December 5, 1996 (the "Record Date") or issued thereafter and prior to the
Distribution Date (as hereinafter defined).

Each Right entitles the registered holder to purchase from the Company, after
the Distribution Date, one share of Common Stock for a price of $40 (the
"Purchase Price"), subject to adjustment. These Rights are substantially similar
to rights issued by the Company in 1986 which expired on December 5, 1996.

The Rights are not exercisable until the Distribution Date. The Distribution
Date is defined as the earlier to occur of (i) 10 days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") has acquired beneficial ownership of 10% or more of the
outstanding Common Stock or increased such ownership further above 10% of the
outstanding Common Stock, or (ii) 10 business days (or such later date as may be
determined by action of the Board of Directors prior to such time as any person
or group of affiliated persons becomes an Acquiring Person) following the
commencement of, or announcement of an intention to make, a tender offer or
exchange offer the consummation of which would result in the beneficial
ownership by a person or group of 10% or more of the outstanding Common Stock.

Until the Distribution Date (or earlier redemption or expiration of the Rights)
(i) the Rights will be evidenced by the certificates representing Common Stock
with a copy of a Summary of Rights attached thereto, (ii) the Rights will be
transferred with and only with the Common Stock, (iii) new Common Stock
certificates issued after the Record Date upon transfer or new issuance of
Common Stock will contain a notation incorporating the Rights Agreement by
reference, and (iv) the surrender for transfer of any certificates for Common
Stock outstanding as of the Record Date, even without such notation or a copy of
this Summary of Rights being attached thereto, will also constitute the transfer
of the Rights associated with the Common Stock represented by the stock
certificate.

In the event that any person or group of affiliated or associated persons
becomes an Acquiring Person, under the terms of the Shareholder Rights Agreement
proper provision must be made so that after the Distribution Date each holder of
a Right (other than Rights beneficially owned by the Acquiring Person or the
affiliates and associates of the Acquiring Person, which will thereafter be
void) will have the right to acquire at the then current Purchase Price of the
Right that number of shares of Common Stock which at that time have a market
value of two times the Purchase Price of the Right.

In the event that after the Distribution Date the Company is acquired in a
merger or other business combination transaction or 50% or more of its
consolidated assets or earning power are sold after a person or group has become
an Acquiring Person, proper provision will be made so that each holder of a
Right (other than an Acquiring Person and the affiliates and associates or the
Acquiring Person, whose Rights will have become void) will thereafter have the
right to receive, upon the exercise thereof at the then current Purchase Price
of the Right, that number of shares of Common Stock of the acquiring company
which at the time of that transaction will have a market value of two times the
Purchase Price of the Right.

The Rights will expire on December 5, 2006 (the "Final Expiration Date"), unless
the Final Expiration Date is extended or unless the Rights are earlier redeemed
or exchanged by the Company, in each case, as described below; provided,
however, the Rights and the Rights Agreement will terminate at the next annual
meeting of stockholders of the Company following the date of the Rights
Agreement if the stockholders do not approve the Rights Agreement at that
meeting.

At any time after any person or group becomes an Acquiring Person and prior to
the acquisition by the Acquiring Person of 50% or more of the outstanding Common
Stock, the Board of Directors of the Company may exchange the Rights (other than
Rights 

                                       17

<PAGE>
 
owned by the Acquiring Person and affiliates and associates of the Acquiring
Person, which will have become void) in whole or in part, at an exchange ratio
of one share of Common Stock per Right (subject to adjustment).

At any time prior to or within 10 business days following the acquisition by an
Acquiring Person of beneficial ownership of 10% or more of the outstanding
Common Stock, the Board of Directors of the Company may redeem the Rights in
whole, but not in part, at a price of $.01 per Right (the "Redemption Price").
The redemption of the Rights may be made effective at such time on such basis
with such conditions as the Board of Directors in its sole discretion may
establish. Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

The Purchase Price payable, and the number of shares of Common Stock or other
securities or property issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Common
Stock, (ii) upon the grant to holders of the Common Stock of certain rights or
warrants to subscribe for or purchase Common Stock at a price, or securities
convertible into Common Stock with a conversion price, less than the
then-current market price of the Common Stock, or (iii) upon the distribution to
holders of the Common Stock of evidences of indebtedness or assets (excluding
regular periodic cash dividends paid out of earnings or retained earnings or
dividends payable in Common Stock) or of subscription rights or warrants (other
than those referred to above).

The number of outstanding Rights and the number of shares of Common Stock
issuable upon exercise of each Right are also subject to adjustment in the event
of a stock split of the Common Stock, a stock dividend on the Common Stock
payable in Common Stock or a subdivision, consolidation or combination of the
Common Stock occurring prior to the Distribution Date.

Pursuant to the Rights Agreement, certain actions (e.g. redeeming outstanding
Rights, amending the Rights Agreement, etc.) may only be made with the approval
of the Board of Directors of the Company.

                                       18

<PAGE>
 
                            ALPHA INDUSTRIES, INC.
                                     PROXY

The undersigned hereby appoints George S. Kariotis and James C. Nemiah, and each
of them, with full power of substitution, attorneys and proxies to represent the
undersigned at the Annual Meeting of Stockholders of Alpha Industries, Inc. to
be held on September 8, 1997, and at any adjournment or adjournments thereof,
with all power which the undersigned would possess if personally present, and to
vote all shares of stock which the undersigned may be entitled to vote at said
meeting upon the election of directors, and the proposal to approve the 1996
Long-Term Incentive Plan, as more fully described in the notice of and proxy
statement for the meeting, in accordance with the following instructions and
with discretionary authority upon such other matters as may come before the
meeting. All previous proxies are hereby revoked.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS. IT WILL BE VOTED AS
DIRECTED BY THE UNDERSIGNED AND IF NO DIRECTION IS INDICATED, IT WILL BE VOTED
FOR THE ELECTION OF THE NOMINEES AS DIRECTORS AND IN FAVOR OF PROPOSAL 2.

                                                                   ---------
       Continued, and to be Signed, on reverse side               SEE REVERSE
(Please fill in the reverse side and mail in enclosed envelope)       SIDE
                                                                   ---------
                                                             

- -----------------------------------       
[REVERSE SIDE]

A [X] Please mark your votes as in this example.

THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR THE NOMINEES AS DIRECTORS 
AND FOR PROPOSAL 2. 
                               WITHHOLD AUTHORITY
                    FOR             FROM ALL            Nominees:
               ALL NOMINEES         NOMINEES            Thomas C. Leonard
1. Election of       [_]             [_]                Arthur Pappas  
   Directors.                                           Raymond Shamie 

(INSTRUCTIONS: TO WITHHOLD AUTHORITY TO VOTE FOR ANY INDIVIDUAL NOMINEE, WRITE
THAT NOMINEE'S NAME IN THE SPACE PROVIDED BELOW)

- -----------------------------------

2. Approval of the Alpha Industries Shareholder Rights Agreement
                                                       FOR    AGAINST    ABSTAIN
                                                       [_]      [_]        [_]

                                                MARK HERE            MARK HERE
                                               FOR ADDRESS          IF YOU PLAN
                                              CHANGE AND [_]       TO ATTEND [_]
                                               NOTE AT LEFT         THE MEETING

Signature: _______________ Date _______ Signature _______________  Date _______

(Signature should be the same as the name printed hereon. Executors,
administrators, trustees, guardians, attorneys and officers of corporations
should add their names when signing)