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                                                                 Exhibit 10.20

                              NONCOMPETE AGREEMENT
                                (Senior Employee)

         This NONCOMPETE AGREEMENT (the "AGREEMENT"), made as of the 1 day of
March, 2001, is entered into between Hittite Microwave Corporation, a Delaware
corporation with offices at 12 Elizabeth Drive, Chelmsford, MA 01925 the
"COMPANY"), and William W. Boecke, an individual residing at 36 Rowena Road,
Newton, MA (the "Employee").

                                    RECITALS:

         A. The Employee is a key employee of the Company.

         B. The Company has agreed to grant to the Employee an option to
purchase ___ shares of the Company's Common Stock. $.01 par value per share,
pursuant to a Stock Option Agreement dated as of 3/1/01.

         C. The Employee's execution of this Agreement is a condition to the
Company's grant of the foregoing securities to the Employee.

         NOW, THEREFORE, in consideration of the mutual covenants and promises
contained herein, and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

         1. NON-COMPETITION COVENANTS.

         (a) NON-COMPETITION COVENANTS. The Employee agrees that he will not,
during the Non-Competition Period (as hereinafter defined), directly or
indirectly:

                  (i) as owner, employee, officer, director, partner, sales
         representative, agent, stockholder, capital investor, lessor,
         consultant or advisor, either alone or in association with others
         (other than as a holder of not more than one percent of the outstanding
         shares of any series or class of securities of a company, which
         securities of such class or series are publicly traded in the
         securities markets), develop, design, produce, market, sell or render
         (or assist any other person or entity in developing, designing,
         producing, marketing, selling or rendering), products or services which
         are competitive with or similar to the Business of the Company (as
         hereinafter defined) anywhere in the world;

                  (ii) solicit, divert or take away, or attempt to solicit,
         divert or take away, the business or patronage of any of the customers
         or referral sources of the Company with whom the Company has had a
         relationship during the period of the Employee's employment by the
         Company; or

                  (iii) recruit, solicit or hire any employee of the Company, or
         induce or attempt to induce any employee of the Company to terminate
         his or her employment with, or otherwise cease his or her relationship
         with, the Company.

         (b) DEFINITIONS. For the purposes of this Section 1, the following
terms shall have the respective meanings indicated below:

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                  (i) "NON-COMPETITION PERIOD" shall mean the period during
         which the Employee is employed by the Company and the two-year period
         commencing on the last day of the Employee's employment by the Company,
         regardless of whether the Employee's termination was at the election of
         the Company, with or without cause, or at the election of the Employee,
         with or without good reason.

                  (ii) "BUSINESS OF THE COMPANY" shall mean the development,
         manufacture, marketing and/or distribution of monolithic microwave
         integrated circuits and assemblies for RF, microwave and millimeter
         wave applications or other products or services which the Company has
         under development or which are subject to active planning at any time
         during the term of the Employee's employment with the Company.

         2. INJUNCTIVE AND OTHER EQUITABLE RELIEF.

         (a) The Employee consents and agrees that if he violates any of the
provisions of Section 1 hereof, the Company shall be entitled, in addition to
any other remedies it may have at law, to the remedies of injunction, specific
performance and other equitable relief for a breach by the Employee of Section 1
of this Agreement. This Section 2(a) shall not, however, be construed as a
waiver of any of the rights which the Company may have for damages or otherwise.

         (b) Any waiver by the Company of a breach of any provision of Section 1
hereof shall not operate or be construed as a waiver of any subsequent breach of
such provision or any other provision hereof.

         (c) The Employee agrees that each provision of Section 1 shall be
treated as a separate and independent clause, and the unenforceability of any
one clause shall in no way impair the enforceability of the other clauses
herein. Moreover, if one or more of the provisions contained in Section 1 shall
for any reason be held to be excessively broad as to scope, activity or subject
so as to be unenforceable at law, such provision or provisions shall be
construed by the appropriate judicial body by limiting and reducing it or them
so as to be enforceable to the maximum extent compatible with the applicable law
as it shall then appear.

         3. OTHER AGREEMENTS. The Employee represents and warrants that his
performance of all the terms of this Agreement and as an employee of the Company
does not and will not breach any other agreement by which he is bound.

         4. NOTICES. All notices required or permitted under this Agreement
shall be in writing and shall be deemed effective upon personal delivery or upon
deposit in the United States Post Office, by registered or certified mail,
postage prepaid, addressed to the other party at the address shown above, or at
such other address or addresses as either party shall designate to the other in
accordance with this Section 4.

         5. NOT A CONTRACT OF EMPLOYMENT. Employee understands that this
Agreement does not constitute a contract of employment or give Employee rights
to employment or continued employment by the Company.

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         6. ENTIRE AGREEMENT. This Agreement constitutes the entire agreement
between the parties and supersedes all prior agreements and understandings,
whether written or oral, relating to the subject matter of this Agreement.

         7. AMENDMENT. This Agreement may be amended or modified only by a
written instrument executed by both the Company and the Employee.

         8. GOVERNING LAW. This Agreement shall be construed, interpreted and
enforced in accordance with the laws of The Commonwealth of Massachusetts,
without regard to its choice of law principles. Employee hereby consents to (a)
service of process, and to be sued, in The Commonwealth of Massachusetts and (b)
to the jurisdiction of the courts of The Commonwealth of Massachusetts and the
United States District Court of Massachusetts, as well as to the jurisdiction of
all courts to which an appeal may be taken from such courts, for the purpose of
any suit, action or other proceeding arising out of any of Employee's
obligations hereunder, and Employee expressly waives any and all objections he
or she may have as to venue in any such courts.

         9. SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon and
inure to the benefit of both parties and their respective successors and
assigns, including any corporation with which or into which the Company may be
merged or which may succeed to its assets or business, provided, however, that
the obligations of the Employee are personal and shall not be assigned by him.

         10. MISCELLANEOUS.

         (a) No delay or omission by the Company in exercising any right under
this Agreement shall operate as a waiver of that or any other right. A waiver or
consent given by the Company on any one occasion shall be effective only in that
instance and shall not be construed as a bar or waiver of any right on any other
occasion.

         (b) The captions of the sections of this Agreement are for convenience
of reference only and in no way define, limit or affect the scope or substance
of any section of this Agreement.

         (c) This Agreement shall be interpreted in such a manner as to be
effective and valid under applicable law, but if any provision hereof shall be
prohibited or invalid under any such law, such provision shall be ineffective to
the extent of such prohibition or invalidity, without invalidating or nullifying
the remainder of such provision or any other provisions of this Agreement. If
any one or more of the provisions contained in this Agreement shall for any
reason be held to be excessively broad as to duration, geographical scope,
activity or subject, such provisions shall be construed by limiting and reducing
it so as to be enforceable to the maximum extent permitted by applicable law.

                                    *********

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         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year set forth above.

                                        HITTITE MICROWAVE CORPORATION

                                        By: /s/ YALCIN AYASLI
                                            -----------------------------------
                                            Name:
                                            Title: President

                                        EMPLOYEE

                                        /s/ WILLIAM W. BOECKE
                                        ---------------------------------------
                                        Name:

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                                                                 Exhibit 10.21

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        PROPRIETARY INFORMATION, CONFIDENTIALITY AND INVENTIONS AGREEMENT

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To:      HITTITE MICROWAVE CORPORATION
         12 Elizabeth Drive
         Chelmsford, Massachusetts 01824         As of March 1, 2001

         I, the undersigned, in consideration of and as a condition of my
employment by Hittite Microwave Corporation (the "Company"), and for other good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, hereby agree as follows:

         1. CONFIDENTIALITY. I agree to keep confidential, except as the Company
may otherwise consent in writing, and, as may be necessary in the ordinary
course of performing my duties to the Company, not to disclose or make any use
of at any time either during or subsequent to my employment, any Inventions (as
hereinafter defined), trade secrets, confidential information, knowledge, data
or other information of the Company relating to products, processes, know-how,
designs, formulas, test data, customer lists, business plans, marketing plans
and strategies, pricing strategies, or other subject matter pertaining to any
business of the Company or any of its affiliates or confidential or proprietary
information of any third parties subject to a duty on the part of the Company to
maintain the confidentiality of such information, which I may produce, obtain,
or otherwise acquire during the course of my employment, except as herein
provided. I further agree not to deliver, reproduce or in any way allow any such
trade secrets, confidential information, knowledge, data or other information or
any documentation relating thereto, to be delivered to or used by any third
parties without specific direction or consent of a duly authorized
representative of the Company.

         2. CONFLICTING EMPLOYMENT; RETURN OF CONFIDENTIAL MATERIAL. I agree
that during my employment with the Company I will not engage in any other
employment, occupation, consulting or other activity relating to the business in
which the Company is now or may hereafter become engaged, or which would
otherwise conflict with my obligations to the Company. In the event my
employment with the Company terminates for any reason whatsoever, I agree to
promptly surrender and deliver to the Company all records, materials, equipment,
drawings, documents and data which I may obtain or produce during the course of
my employment, and I further agree that I will not take with me any description
containing or pertaining to any confidential information, knowledge or data of
the Company which I may produce or obtain during the course of my employment.

         3. ASSIGNMENT OF INVENTIONS.

         3.1 I hereby acknowledge and agree that the Company is the owner of all
Inventions (as hereinafter defined). In order to protect the Company's rights to
such Inventions, by executing this Agreement I hereby irrevocably assign to the
Company all my right, title and interest in and to all Inventions.

         3.2 For purposes of this Agreement, "Inventions" shall mean all
discoveries, processes, designs, technologies, devices, or improvements in any
of the foregoing or other

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ideas, whether or not patentable and whether or not reduced to practice, made or
conceived by me (whether solely or jointly with others) during the period of my
employment with the Company which relate in any manner to the actual or
demonstrably anticipated business, work, or research and development of the
Company, or result from or are suggested by any tasks assigned to me or any work
performed by me for or on behalf of the Company.

         3.3 Any discovery, process, design, technology, device, or improvement
in any of the foregoing or other ideas, whether or not patentable and whether or
not reduced to practice, made or conceived by me (whether solely or jointly with
others) which I develop entirely on my own time not using any of the Company's
equipment, supplies, facilities, or trade secret information ("Personal
Invention") is excluded from this Agreement provided such Personal Invention (a)
does not relate to the actual or demonstrably anticipated business, research and
development of the Company; and (b) does not result, directly or indirectly,
from any work performed by me for the Company.

         4. DISCLOSURE OF INVENTIONS. I agree that in connection with any
Invention, I will promptly disclose such Invention to my immediate superior at
the Company in order to permit the Company to enforce its property rights to
such Invention in accordance with this Agreement. My disclosure shall be
received in confidence by the Company.

         5. PATENTS AND COPYRIGHTS: EXECUTION OF DOCUMENTS.

         5.1 Upon request, I agree to assist the Company or its nominee (at its
expense) during and at any time subsequent to my employment in every reasonable
way to obtain for its own benefit patents and copyrights for Inventions in any
and all countries. Such patents and copyrights shall be and remain the sole and
exclusive property of the Company or its nominee. I agree to perform such lawful
acts as the Company deems to be necessary to allow it to exercise all right,
title and interest in and to such patents and copyrights.

         5.2 In connection with this Agreement, I agree to execute, acknowledge
and deliver to the Company or its nominee upon request and at its expense all
documents, including assignments of title, patent or copyright applications,
assignments of such applications, assignments of patents or copyrights upon
issuance, as the Company may determine necessary or desirable to protect the
Company's or its nominee's interest in Inventions, and/or to use in obtaining
patents or copyrights in any and all countries and to vest title thereto in the
Company or its nominee to any of the foregoing.

         6. MAINTENANCE OF RECORDS. I agree to keep and maintain adequate and
current written records of all Inventions made by me (in the form of notes,
sketches, drawings and other records as may be specified by the Company), which
records shall be available to and remain the sole property of the Company at all
times.

         7. PRIOR INVENTIONS. It is understood that all Personal Inventions, if
any, whether patented or unpatented, which I made prior to my employment by the
Company, are excluded from this Agreement. To preclude any possible uncertainty,
I have set forth on Schedule A attached hereto a complete list of all of my
prior Personal Inventions, including numbers of all patents and patent
applications and a brief description of all unpatented Personal Inventions

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which are not the property of a previous employer. I represent and covenant that
the list is complete and that, if no items are on the list, I have no such prior
Personal Inventions. I agree to notify the Company in writing before I make any
disclosure or perform any work on behalf of the Company which appears to
threaten or conflict with proprietary rights I claim in any Personal Invention.
In the event of my failure to give such notice, I agree that I will make no
claim against the Company with respect to any such Personal Invention.

         8. OTHER OBLIGATIONS. I acknowledge that the Company from time to time
may have agreements with other persons or with the U.S. Government or agencies
thereof, which impose obligations or restrictions on the Company regarding
Inventions made during the course of work thereunder or regarding the
confidential nature of such work. I agree to be bound by all such obligations
and restrictions and to take all action necessary to discharge the Company's
obligations.

         9. TRADE SECRETS OF OTHERS. I represent that my performance of all the
terms of this Agreement and as an employee of the Company does not and will not
breach any agreement to keep confidential proprietary information, knowledge or
data acquired by me in confidence or in trust prior to my employment with the
Company or any other agreement with any previous employer or other party, and I
will not disclose to the Company, or induce the Company to use, any confidential
or proprietary information or material belonging to any previous employer or
others. I agree not to enter into any agreement either written or oral in
conflict herewith.

         10. Without limiting the remedies available to the Company, I
acknowledge that a breach of any of the terms of this Agreement could result in
irreparable injury to the Company for which there might be no adequate remedy at
law and that, in the event of such a breach or threat thereof, the Company shall
be entitled to obtain a temporary restraining order and/or a preliminary
injunction and a permanent injunction restraining me from engaging in any
activities prohibited by this Agreement or such other equitable relief as may be
required to enforce specifically any of the covenants of this Agreement.

         11. MODIFICATION. I agree that any subsequent change or changes in my
employment duties, salary or compensation or, if applicable, in any Employment
Agreement between the Company and me, shall not affect the validity or scope of
this Agreement.

         12. SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon my
heirs, executors, administrators or other legal representatives and is for the
benefit of the Company, its successors and assigns.

         13. INTERPRETATION. IT IS THE INTENT OF THE PARTIES THAT in case any
one or more of the provisions contained in this Agreement shall, for any reason,
be held to be invalid, illegal or unenforceable in any respect, such invalidity,
illegality or unenforceability shall not affect the other provisions of this
Agreement, and this Agreement shall be construed as if such invalid, illegal or
unenforceable provision had never been contained herein. MOREOVER, IT IS THE
INTENT OF THE PARTIES THAT in case any one or more of the provisions contained
in this Agreement shall for any reason be held to be excessively broad as to
duration, geographical scope, activity or subject, such provision shall be
construed by dating and reducing it in

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accordance with a judgment of a court of competent jurisdiction, so as to be
enforceable to the extent compatible with applicable law.

         14. WAIVERS. If either party should waive any breach of any provision
of this Agreement, he or it shall not thereby be deemed to have waived any
preceding or succeeding breach of the same or any other provision of this
Agreement.

         15. COMPLETE AGREEMENT, AMENDMENTS. I acknowledge receipt of this
Agreement, and agree that with respect to the subject matter thereof it is my
entire agreement with the Company, superseding any previous oral or written
communications, representations, understandings, or agreements with the Company
or any officer or representative thereof. I understand and acknowledge that this
Agreement is an agreement of proprietary information, confidentiality and
inventions, and that this is not a contract for any term of employment and does
not modify the at-will status of the employment relationship. I further
acknowledge that this Agreement creates no contractual terms of employment other
than those specifically enumerated herein. Any amendment to this Agreement or
waiver by either party of any right hereunder shall be effective only if
evidenced by a written instrument executed by the parties hereto, and, in the
case of the Company, upon written authorization of the Company's Board of
Directors.

         16. HEADINGS. The headings of the sections hereof are inserted for
convenience only and shall not be deemed to constitute a part hereof nor to
affect the meaning thereof.

         17. COUNTERPARTS. This Agreement may be signed in two counterparts,
each of which shall be deemed an original and both of which shall together
constitute one agreement.

         18. GOVERNING LAW. This Agreement shall be governed and construed under
Massachusetts Law.

                                    EMPLOYEE

                                    /s/ WILLIAM W. BOECKE
                                    -------------------------------------------

                                    Accepted and Agreed:

                                    HITTITE MICROWAVE CORPORATION

                                    By: /s/ WILLIAM SYLVANOWICZ
                                        ---------------------------------------
                                        Duly Authorized

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