Document:

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                   FIFTH AMENDED AND RESTATED LOAN AGREEMENT

                  THIS FIFTH AMENDED AND RESTATED LOAN AGREEMENT ("Agreement")
is made and entered into as of May 31, 2000, by and between REMEC, Inc., a
California corporation ("Borrower"), and UNION BANK OF CALIFORNIA, N.A.
("Bank"). This Agreement amends and restates in its entirety that certain Fourth
Amended and Restated Loan Agreement, dated February 24, 2000, by and between
Bank and Borrower, as amended.

         SECTION 1. THE LOAN

                  1.1.1.   THE REVOLVING LOAN. Bank will loan to Borrower an
amount not to exceed Twelve Million Dollars ($12,000,000) outstanding in the
aggregate at any one time (the "Revolving Loan"). Borrower may borrow, repay and
reborrow all or part of the Revolving Loan in amounts of not less than One
Hundred Thousand Dollars ($100,000) in accordance with the terms of the
Revolving Note. All borrowings of the Revolving Loan must be made before July 1,
2002 at which time all unpaid principal and interest of the Revolving Loan shall
be due and payable. The Revolving Loan shall be evidenced by a promissory note
(the "Revolving Note") on the standard form used by Bank for commercial loans.
Bank shall enter each amount borrowed and repaid in Bank's records and such
entries shall be deemed to be the amount of the Revolving Loan outstanding.
Omission of Bank to make any such entries shall not discharge Borrower of its
obligation to repay in full with interest all amounts borrowed.

                  1.1.1.1  THE L/C SUBLIMIT. As a sublimit to the Revolving
Loan, Bank shall issue, for the account of Borrower, one or more irrevocable
standby letters of credit (individually an "L/C" and collectively the "L/Cs").
All such L/Cs shall be drawn on such terms and conditions as are acceptable to
Bank The aggregate amount available to be drawn under all outstanding L/Cs and
the aggregate amount of unpaid reimbursement obligations under drawn L/Cs shall
not exceed One Million Dollars ($1,000,000) and shall reduce, dollar for dollar,
the maximum amount available under the Revolving Loan. No L/C shall have an
expiry date more than twelve (12) months from its date of issuance and each L/C
shall be governed by the terms of (and Borrower agrees to execute) Bank's
standard form of standby letter of credit application and reimbursement
agreement. No L/C shall expire after December 30, 2002.

                  1.2      TERMINOLOGY.

                  As used herein, the word "Loan" shall mean, collectively, all
the credit facilities described above.

                  As used herein, the word "Note" shall mean, collectively, all
the promissory notes described above and all reimbursement agreements entered
into with respect to L/Cs.

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                  As used herein, the words "Loan Documents" shall mean all
documents executed in connection with this Agreement.

                  As used herein, the word "Subsidiary" shall mean, for any
entity, any corporation or other entity of which securities or other ownership
interests having ordinary voting power to elect a majority of the board of
directors or other persons or entities performing similar functions are at the
time directly or indirectly owned by such entity. Unless otherwise specified,
"Subsidiary" means a Subsidiary of Borrower.

                  1.3      PURPOSE OF LOAN. The proceeds of the Revolving Loan
shall be used only for general working capital purposes.

                  1.4      INTEREST. The unpaid principal balance of the
Revolving Loan shall bear interest at the rates provided in the Revolving Note
selected by Borrower. Such loan may be prepaid in full or in part only in
accordance with the terms of such note and any such prepayment shall be subject
to the prepayment fee provided for therein.

                  1.5      UNUSED COMMITMENT FEE. Borrower shall pay to Bank a
fee on the unutilized portion of the Revolving Loan ("Non-utilization Fee")
calculated and payable annually in arrears, based on the combined unutilized
amount of such loans, at a rate of nine one-hundredths of one percent (0.0009)
per annum.

                  1.6      L/C FEES. All fees in connection with each commercial
letter of credit shall be paid in accordance with the Bank's standard schedule
of fees and charges as published from time to time. For standby letters of
credit, the issuance/maintenance fee for each L/C shall be one percent (1.0%)
per annum (minimum $500), payable annually in advance on the date such L/C is
issued and on each anniversary date thereafter.

                  1.7      BALANCES. Borrower shall maintain its major
depository accounts with Bank until the Note and all sums payable pursuant to
this Agreement have been paid in full.

                  1.8      DISBURSEMENT. Bank shall disburse the proceeds of the
Loan as provided in Bank's standard form Authorization executed by Borrower.

                  1.9      CONTROLLING DOCUMENT. In the event of any
inconsistency between the terms of this Agreement and any Note or any of the
other Loan Documents, the terms of such Note or other Loan Documents will
prevail over the terms of this Agreement.

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         SECTION 2. CONDITIONS PRECEDENT

                  Bank shall not be obligated to disburse all or any portion of
the proceeds of the Loan unless at or prior to the time for the making of such
disbursement, the following conditions have been fulfilled to Bank's
satisfaction:

                  2.1      COMPLIANCE. Borrower shall have performed and
complied with all terms and conditions required by this Agreement to be
performed or complied with by it prior to or at the date of the making of such
disbursement and shall have executed and delivered to Bank the Note and other
documents deemed necessary by Bank.

                  2.2      GUARANTIES. Humphrey, Inc., REMEC Microwave, Inc.,
REMEC Veritek, Inc., REMEC CSH, Inc., Remec Wireless, Inc., REMEC Magnum, Inc.,
REMEC Q-bit, Inc., Remec Wacom, L.P,, and REMEC Wacom Texas Inc. ("Guarantors")
shall have executed and delivered to Bank their respective continuing guaranties
in form and amount satisfactory to Bank.

                  2.3      BORROWING RESOLUTION. Borrower shall have provided
Bank with certified copies of resolutions, duly adopted by the Board of
Directors of Borrower, authorizing this Agreement and the Loan Documents. Such
resolutions shall also designate the persons who are authorized to act on
Borrower's behalf in connection with this Agreement and to do the things
required of Borrower pursuant to this Agreement.

                  2.4      CONTINUING COMPLIANCE. At the time any disbursement
is to be made, there shall not exist any event, condition or act which
constitutes an event of default under Section 6 hereof or any event, condition
or act which with notice, lapse of time or both would constitute such event of
default; nor shall there be any such event, condition, or act immediately after
the disbursement were it to be made.

         SECTION 3.  REPRESENTATION AND WARRANTIES

                  Borrower represents and warrants that:

                  3.1      BUSINESS ACTIVITY. The principal business of Borrower
is the manufacture of microwave electronic components and subsystems.

                  3.2      SUBSIDIARIES AND AFFILIATES. Borrower's Subsidiaries
and affiliates (those entities in which Borrower holds at least a 25% ownership
interest (individually an "Affiliate" and collectively the "Affiliates") and
their addresses, are as provided on a schedule delivered to Bank on or before
the date of this Agreement.

                  3.3      AUTHORITY TO BORROW. The execution, delivery and
performance of this Agreement, the Note and all other agreements and instruments
required by Bank in connection with the Loan are not in contravention of any of
the terms of any indenture,

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agreement or undertaking to which Borrower is a party or by which it or any of
its property is bound or affected.

                  3.4      FINANCIAL STATEMENTS. The financial statements of
Borrower, including both a balance sheet at January 31, 2000, together with
supporting schedules, and an income statement for the twelve (12) months ended
January 31, 2000, have heretofore been furnished to Bank, are true and complete
and fairly represent the financial condition of Borrower during the period
covered thereby. Since January 31, 2000, there has been no material adverse
change in the financial condition or operations of Borrower.

                  3.5      TITLE. Except for assets which may have been disposed
of in the ordinary course of business, Borrower and each Subsidiary have good
and marketable title to all of the property reflected in Borrower's financial
statements delivered to Bank and to all property acquired by Borrower and each
Subsidiary since the date of said financial statements, free and clear of all
liens, encumbrances, security interests and adverse claims except those
specifically referred to in said financial statements.

                  3.6      LITIGATION. There is no litigation or proceeding
pending or threatened against Borrower, any Subsidiary or any of Borrower's or
any Subsidiary's property which is reasonably likely to affect the financial
condition, property or business of Borrower or such Subsidiary in a materially
adverse manner or result in liability in excess of Borrower's or such
Subsidiary's insurance coverage except the lawsuit filed on April 19, 1999 by
Milberg Weiss Bershad Hynes and Lerach.

                  3.7      DEFAULT. Neither Borrower nor any Subsidiary is in
default in the payment of any of its material obligations and, except as
Borrower has otherwise advised Bank in writing, there exists no event, condition
or act which constitutes an event of default under Section 6 hereof and no
event, condition or act which with notice or lapse of time, or both, would
constitute such an event of default.

                  3.8      ORGANIZATION. Borrower and each Subsidiary are duly
organized and existing under the laws of their respective states of
organization, and have the power and authority to carry on the businesses in
which they are engaged and/or propose to engage.

                  3.9      POWER. Borrower has the power and authority to enter
into this Agreement and to execute and deliver the Note and all of the other
Loan Documents.

                  3.10     AUTHORIZATION. This Agreement and all things required
by this Agreement have been duly authorized by all requisite action of Borrower.

                  3.11     QUALIFICATION. Borrower and each Subsidiary are duly
qualified and in good standing in all jurisdictions where such qualification is
required.

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                  3.12     COMPLIANCE WITH LAWS. Neither Borrower nor any
Subsidiary is in violation with respect to any applicable laws, rules,
ordinances or regulations which materially affect the operations or financial
condition of Borrower or such Subsidiary.

                  3.13     ERISA. Any defined benefit pension plans as defined
in the Employee Retirement Income Security Act of 1974, as amended ("ERISA"), of
Borrower and each Subsidiary meet, as of the date hereof, the minimum funding
standards of Section 302 of ERISA, and no Reportable Event or Prohibited
Transaction as defined in ERISA has occurred with respect to any such plan.

                  3.14     REGULATION U. No action has been taken or is
currently planned by Borrower, any Subsidiary, or any agent acting on Borrower's
or any Subsidiary's behalf which would cause this Agreement or the Note to
violate Regulation U or any other regulation of the Board of Governors of the
Federal Reserve System or to violate the Securities and Exchange Act of 1934, in
each case as in effect now or as the same may hereafter be in effect. Neither
Borrower nor any Subsidiary is engaged in the business of extending credit for
the purpose of purchasing or carrying margin stock as one of its important
activities, and none of the proceeds of the Loan will be used directly or
indirectly for such purpose.

                  3.15     CONTINUING REPRESENTATIONS. These representations
shall be considered to have been made again at and as of the date of each
disbursement of the Loan and shall be true and correct as of such date or dates.

         SECTION 4. AFFIRMATIVE COVENANTS

                  Until the Note and all sums payable pursuant to this Agreement
or any other of the Loan Documents have been paid in full, unless Bank waives
compliance in writing, Borrower agrees that:

                  4.1      PROCEEDS. Borrower will use the proceeds of the Loan
only as provided in Section 1.3, above.

                  4.2      PAYMENT OF OBLIGATIONS. Borrower will, and will cause
each Subsidiary to, pay and discharge promptly all taxes, assessments and other
governmental charges and claims levied or imposed upon it or its property, or
any part thereof, provided, however, that Borrower and its Subsidiaries shall
have the right in good faith to contest any such taxes, assessments, charges or
claims and, pending the outcome of such contest, to delay or refuse payment
thereof provided that adequately funded reserves are established by it to pay
and discharge any such taxes, assessments, charges and claims.

                  4.3      MAINTENANCE OF EXISTENCE. Borrower will, and will
cause each Subsidiary to, maintain and preserve its existence and assets and all
rights, franchises, licenses and other authority necessary for the conduct of
its business, and will, and will

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cause each Subsidiary to, maintain and preserve its property, equipment and
facilities in good order, condition and repair. Bank may, at reasonable times,
visit and inspect any of the properties of Borrower and such Subsidiaries.

                  4.4      RECORDS. Borrower will, and will cause each
Subsidiary to, keep and maintain full and accurate accounts and records of its
operations according to generally accepted accounting principles and will, and
will cause each Subsidiary to, permit Bank to have access thereto, to make
examination and photocopies thereof, and to make audits during regular business
hours, Costs for such audits shall be paid by Borrower.

                  4.5      INFORMATION FURNISHED. Borrower will furnish to Bank:

                           (a)      Within forty-five (45) days after the close
of each fiscal quarter, except for the final quarter of each fiscal year,
Borrower's consolidated unaudited balance sheet as of the close of such fiscal
quarter, and Borrower's consolidated unaudited income and expense statement with
supportive schedules and statement of retained earnings for such fiscal quarter,
in each case prepared in accordance with generally accepted accounting
principles, accompanied by an unaudited consolidating schedule;

                           (b)      Within ninety (90) days after the close of
each fiscal year, a copy of Borrower's consolidated statement of financial
condition including at least its balance sheet as of the close of such fiscal
year, and its income and expense statement and retained earnings statement for
such fiscal year, examined and prepared on an audited basis by independent
certified public accountants selected by Borrower and reasonably satisfactory to
Bank in accordance with generally accepted accounting principles applied on a
basis consistent with that of previous years, accompanied by an unaudited
consolidating schedule;

                           (c)      As soon as available, copies of such
financial statements and reports as Borrower may file with any state or federal
agency, including its 10-K and 10-Q reports;

                           (d)      As soon as available, and in any event not
later than ninety (90) days after the commencement of each Fiscal Year, a
quarterly budget for that Fiscal Year including a consolidating balance sheet,
profit and loss statement, statement of cash flow and schedule of capital
expenditures all in reasonable detail;

                           (e)      Such other financial statements and
information as Bank may reasonably request from time to time;

                           (f)      In connection with each fiscal year-end
statement required hereunder, any management letter of Borrower's certified
public accountants;

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                           (g)      Within forty-five (45) days after the close
of each fiscal quarter, a certification of compliance with all covenants under
this Agreement, executed by Borrower's chief financial officer or other duly
authorized officer of Borrower, in form acceptable to Bank;

                           (h)      Prompt written notice to Bank of all events
of default under any of the terms or provisions of this Agreement or of any
other agreement, contract, document or instrument entered or to be entered into
with Bank, any litigation in excess of One Million Dollars ($1,000,000) which,
if decided adversely to Borrower or a Subsidiary, would have a material adverse
effect on Borrower's or such Subsidiary's financial condition, and any other
matter which has resulted in, or is likely to result in, a material adverse
change in Borrower's or a Subsidiary's financial condition or operations; and

                           (i)      Prior written notice to Bank of any changes
in Borrower's officers and other senior management, Borrower's or any
Subsidiary's name, and the location of Borrower's or any Subsidiary's assets,
principal place of business or chief executive office.

                  4.6      QUICK RATIO. Borrower will maintain at all times a
ratio of consolidated cash, accounts receivable and marketable securities to
consolidated current liabilities of not less than 1.5:1.0, as such terms are
defined by generally accepted accounting principles.

                  4.7      TANGIBLE NET WORTH. Borrower will at all times
maintain a consolidated Tangible Net Worth of not less than the sum of (a) One
Hundred Sixty-five Million Six Hundred Thirty One Thousand Eight Hundred and
Ninety One Dollars ($165,631,891), (b) ninety percent (90%) of Borrower's
consolidated net profit after taxes for each fiscal quarter of Borrower ending
after January 31, 2000 and on or prior to the date of computation, and (c) one
hundred percent (100%) of the net proceeds of any equity securities issued by
Borrower on or after January 31, 2000. As used herein, the words "Tangible Net
Worth" shall mean Borrower's consolidated net worth decreased by Borrower's
consolidated patents, licenses, trademarks, trade names, goodwill and other
similar intangible assets, organizational expenses, and monies due from
Affiliates, officers, shareholders and directors.

                  4.8      FIXED CHARGE COVERAGE RATIO. Borrower will maintain a
ratio of consolidated EBITDA, plus consolidated operating and capital lease
payments (including payments in respect of the Synthetic Lease), to consolidated
Fixed Charges of not less than 2.0:1.00. As used herein, the word "EBITDA" shall
mean income from operations after deducting all expenses other than interest,
taxes, depreciation, amortization and non-recurring, non-operating expenses as
specifically identified by Borrower and approved by Bank in writing. As used
herein, the words "Fixed Charges" shall mean the

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sum of (i) that portion of long-term liabilities, (ii) interest expense, (iii)
capital lease payments, (iv) operating lease payments (including payments in
respect of the Synthetic Lease), (v) income taxes, and (vi) dividends, due or
paid during the twelve (12) month period preceding the date of calculation.
Compliance with this subsection shall be measured as at the end of each fiscal
quarter of Borrower for the immediately preceding twelve (12) month period.

                  4.9      FUNDED DEBT TO EBITDA RATIO. Borrower will maintain a
ratio of consolidated Funded Debt to consolidated EBITDA of not more than (a) as
at the end of the fiscal quarter of Borrower ended January 31, 2000, 2.50:1.00,
(b) as at the end of the fiscal quarter of Borrower ended April 30, 2000,
2.00:1.00, and (c) as at the end of the fiscal quarter of Borrower ending July
31, 2000, and at all times thereafter, 1.50:1.00. As used herein, the words
"Funded Debt" shall mean all funds borrowed by Borrower and its Subsidiaries,
including loans and capital leases (whether senior or subordinated), plus the
Synthetic Lease Balance.

                  4.10.    FUTURE SUBSIDIARIES. Borrower shall cause each
Domestic Subsidiary formed or acquired after the closing date of this agreement
to execute and deliver an appropriate Subsidiary Guaranty and Security Agreement
in form and substance satisfactory to Bank. As requested by Bank, Borrower shall
cause each Foreign Subsidiary formed or acquired after the closing date of this
agreement to deliver an appropriate Subsidiary Guaranty in form and substance
satisfactory to Bank and/or pledge 65% of the capital stock of the Subsidiary if
the Subsidiary or Subsidiaries combined have tangible assets in excess of 5% of
the total tangible assets of Borrower and its Subsidiaries on a consolidated
basis as at the end of the fiscal year then most recently ended.

                  4.11     INSURANCE. Borrower will, and will cause each
Subsidiary to, keep all of its insurable property, real, personal or mixed,
insured by good and responsible companies against fire and such other risks as
are customarily insured against by companies conducting similar business with
respect to like properties. Borrower will, and will cause each Subsidiary to,
maintain adequate worker's compensation insurance and adequate insurance against
liability for damages to persons and property.

                  4.12     ADDITIONAL REQUIREMENTS. Borrower will promptly, upon
demand by Bank, take such further action and execute all such additional
documents and instruments in connection with this Agreement as Bank in its
reasonable discretion deems necessary, and will promptly supply Bank with such
other information concerning its affairs or the affairs of any Subsidiary as
Bank may request from time to time.

                  4.13     LITIGATION AND ATTORNEYS' FEES. Borrower will pay
promptly to Bank, upon demand, reasonable attorneys' fees (including but not
limited to the reasonable estimate of the allocated costs and expenses of
in-house legal counsel and

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legal staff) and all costs and other expenses paid or incurred by Bank in
collecting, modifying or compromising the Loan or in enforcing or exercising its
rights or remedies created by, connected with or provided for in this agreement
or any of the Loan Documents, whether or not an arbitration, judicial action or
other proceeding is commenced. If such proceeding is commenced, only the
prevailing party shall be entitled to attorneys' fees and court costs.

                  4.14     BANK EXPENSES. Borrower will pay or reimburse Bank
for all costs, expenses and fees incurred by Bank in preparing and documenting
this Agreement and the Loan, and all amendments and modifications thereof,
including but not limited to all filing and recording fees, costs of appraisals,
insurance and attorneys' fees, including the reasonable estimate of the
allocated costs and expenses of in-house legal counsel and legal staff.

                  4.15     REPORTS UNDER PENSION PLANS. Borrower will furnish to
Bank, as soon as possible and in any event within fifteen (15) days after
Borrower knows or has reason to know that any event or condition with respect to
any defined benefit pension plans of Borrower described in Section 3, above, has
occurred, a statement of an authorized officer of Borrower describing such event
or condition and the action, if any, which Borrower proposes to take with
respect thereto.

         SECTION 5. NEGATIVE COVENANTS

                  Until the Note and all other sums payable pursuant to this
Agreement or any other of the Loan Documents have been paid in full, unless Bank
waives compliance in writing, Borrower agrees that:

                  5.1      ENCUMBRANCES AND LIENS. Borrower will not, and will
not permit any Subsidiary to, create, assume or suffer to exist any mortgage,
pledge, security interest, encumbrance, or lien (other than for taxes not
delinquent or for taxes or other items being contested in good faith) on
property of any kind, whether real, personal or mixed, now owned or hereafter
acquired, or upon the income or profits thereof, except to Bank and except for
(a) minor encumbrances and easements on real property which do not affect its
market value, (b) existing liens on personal property owned by Borrower or a
Subsidiary, and (c) future purchase money security interests encumbering only
the personal property purchased.

                  5.2      BORROWINGS. Borrower will not, and will not permit
any Subsidiary to, sell, discount or otherwise transfer any account receivable
or any note, draft or other evidence of indebtedness, except to Bank or except
to a financial institution at face value for deposit or collection purposes only
and without any fee other than fees normally charged by the financial
institution for deposit or collection services. Borrower will not, and will not
permit any Subsidiary to, borrow any money, become contingently liable to

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borrow money, nor enter any agreement to directly or indirectly obtain borrowed
money, except pursuant to agreements made with Bank and except for loans and
other borrowings secured by liens permitted by Section 5.1, and except for
obligations incurred by AirTech under the foreign exchange and shipside bond
facilities of AirTech referred to in Section 5.4.

                  5.3      SALE OF ASSETS, LIQUIDATION OR MERGER. Borrower will
not, and will not permit any Subsidiary to (a) liquidate, dissolve or enter into
any consolidation, merger, partnership, joint venture or other combination, (b)
convey, sell or lease all or the greater part of its assets or business, or (c)
purchase or lease all or the greater part of the assets or business of another
if the total purchase price exceeds Thirty Million Dollars ($30,000,000) or the
cash consideration exceeds Fifteen Million Dollars ($15,000,000).

                  5.4      LOANS, ADVANCES AND GUARANTIES. Borrower will not,
and will not permit any Subsidiary to, except in the ordinary course of business
as currently conducted, make any loans or advances, become a guarantor or
surety, pledge its credit or properties in any manner or extend credit;
provided, however, that (a) Borrower may (i) make loans or advances to
Affiliates or Subsidiaries, (ii) guarantee the obligations of AirTech referred
to in Section 5.2, and (iii) guarantee the obligations of AirTech to Lloyds Bank
arising under the foreign exchange facility in an amount not to exceed Five
Hundred Thousand Pounds Sterling (GBP500,000) and the shipside bond facility in
an amount not to exceed One Hundred Thousand Pounds Sterling (GBP100,000) which
are presently provided to AirTech by Lloyds Bank, and (b) AirTech may (i)
provide E-Plus Mobilfunk GmbH a contract performance bond in an amount not to
exceed One Million Seven Hundred Fifty Thousand German Marks (DM1,750,000) and
with an expiry of not later than December 31, 2000, and (ii) provide Bouygues
Telecom SA with a contract performance bond in an amount not to exceed Four
Million Seven Hundred Thousand French Francs (FF4,700,000) and with an expiry of
not later than December 31, 2000.

                  5.5      INVESTMENTS. Borrower will not, and will not permit
any Subsidiary to, purchase the debt or equity of another person or entity,
except for (a) savings accounts and certificates of deposit of Bank, direct U.S.
Government obligations and commercial paper issued by corporations with the top
ratings of Moody's or Standard & Poor's, provided all such permitted investments
shall mature within one (1) year of purchase, and (b) Borrower's purchase of
preferred stock in Sky Online Inc. in the amount of Ten Million Fifty Thousand
Dollars ($10,050,000).

                  5.6      PREPAYMENT OF CERTAIN DEBT/STOCK REDEMPTIONS.
Borrower will not, and will not permit any Subsidiary to, prepay any
subordinated debt, debt for borrowed money, or debt secured by a lien permitted
by Section 5.1, above, or enter into or modify any a agreement as a result of
which the terms of payment of any such debt are waived or modified. Borrower
will not expend more than Ten Million Dollars

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($l0,000,000) in the aggregate in connection with the redemption, purchase,
retirement or other acquisition of shares of any class of its capital stock.

                  5.7      TRANSACTIONS WITH RELATED PERSONS. Borrower will not,
and will not permit any Subsidiary to, directly or indirectly enter into any
transaction with or for the benefit of a Related Person on terms more favorable
to the Related Person than would have been obtainable in an "arms length"
dealing. As used herein, the words "Related Person" shall mean any Affiliate of
Borrower or a Subsidiary, or any officer, employee, director or shareholder of
Borrower, any Subsidiary or any Affiliate, or a relative of any of the
foregoing.

                  5.8      LOSSES. Borrower will not incur a cumulative
consolidated net loss for any fiscal year commencing with the fiscal year of
Borrower ending January 31, 2001.

         SECTION 6. EVENTS OF DEFAULT

                  The occurrence of any of the following events ("Events of
Default") shall terminate any obligation on the part of Bank to make or continue
the Loan and, automatically unless otherwise provided under the Note, shall make
all sums of interest and principal and any other amounts owing under the Loan
immediately due and payable, without notice of default, presentment or demand
for payment, protest or notice of nonpayment or dishonor, or any other notices
or demands:

                  6.1      Borrower shall default in the due and punctual
payment of the principal of or the interest on the Note or any of the other Loan
Documents; or

                  6.2      Any default shall occur under the Note; or

                  6.3      Borrower shall default in the due performance or
observance of any covenant or condition of the Loan Documents; or

                  6.4      Any guaranty or subordination agreement now or
hereafter required hereunder is breached or becomes ineffective, or any
guarantor or subordinating creditor dies, disavows or attempts to revoke or
terminate such guaranty or subordination agreement.

         SECTION 7. MISCELLANEOUS PROVISIONS

                  7.1      ADDITIONAL REMEDIES. The rights, powers and remedies
given to Bank hereunder shall be cumulative and not alternative and shall be in
addition to all rights, powers and remedies given to Bank by law against
Borrower or any other person or entity, including but not limited to Bank's
rights of set off or banker's lien.

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                  7.2      NONWAIVER. Any forbearance or failure or delay by
Bank in exercising any right, power or remedy hereunder shall not be deemed a
waiver thereof and any single or partial exercise of any right, power or remedy
shall not preclude the further exercise thereof. No waiver shall be effective
unless it is in writing and signed by an officer of Bank.

                  7.3      INUREMENT. The benefits of this Agreement shall inure
to the successors and assigns of Bank and the permitted successors and assigns
of Borrower, and any assignment by Borrower without Bank's consent shall be null
and void.

                  7.4      APPLICABLE LAW. This Agreement and all other
agreements and instruments required by Bank in connection herewith shall be
governed by and construed according to the laws of the State of California.

                  7.5      SEVERABILITY. Should any one or more provisions of
this Agreement be determined to be illegal or unenforceable, all other
provisions nevertheless shall be effective. In the event of any conflict between
the provisions of this Agreement and the provisions of any Note or reimbursement
agreement evidencing any indebtedness hereunder, the provisions of such Note or
reimbursement agreement shall prevail.

                  7.6      INTEGRATION CLAUSE. Except for documents and
instruments specifically referenced herein, this Agreement constitutes the
entire agreement between Bank and Borrower regarding the Loan, and all prior
communications, verbal or written, between Borrower and Bank shall be of no
further effect or evidentiary value.

                  7.7      CONSTRUCTION. The section and subsection headings
herein are for convenience of reference only and shall not limit or otherwise
affect the meaning hereof.

                  7.8      AMENDMENTS. This Agreement may be amended only in
writing signed by all parties hereto.

                  7.9      COUNTERPARTS. Borrower and Bank may execute one or
more counterparts to this Agreement, each of which shall be deemed an original,
but taken together shall constitute one and the same instrument.

         SECTION 8. SERVICE OF NOTICES

                  8.1      Any notices or other communications provided for or
allowed hereunder shall be effective only when given by one of the following
methods and addressed to the respective party at its address given with the
signatures at the end of this Agreement and shall be considered to have been
validly given (a) upon delivery, if delivered personally, (b) upon receipt, if
mailed, first class postage prepaid, with the United States Postal Service, (c)
on the next business day, if sent by overnight courier

                                       12
<PAGE>

service of recognized standing, and (d) upon telephoned confirmation of receipt,
if telecopied.

                  8.2      The addresses to which notices or demands are to be
given may be changed from time to time by notice delivered as provided above.

                  THIS AGREEMENT is executed on behalf of the parties by duly
authorized officers as of the date first above written.

UNION BANK OF CALIFORNIA, N.A.            REMEC, INC.

By:      /s/ Rick Young                   By:      /s/ Michael McDonald
         --------------------------                -----------------------------
         Rick Young, Vice President                Michael McDonald, SVP, CFO &
                                                   Secretary

                                          By:      /s/ Ronald E. Ragland
                                                   -----------------------------
                                                   Ronald E. Ragland, Chief
                                                   Executive Officer

Address: 530 "B" Street, Fourth Floor     Address: 9404 Chesapeake Drive
         San Diego, CA  92186-5324                 San Diego, CA  92123
         Attention: Mr. Rick Young                 Attention: Mr. Ronald Ragland

Telephone:        (619) 230-3756          Telephone:        (619) 505-3145
                  (619) 230-3366                            (619) 560-4029

                                       13<PAGE>

January 31, 2001

REMEC, Inc.
9404 Chesapeake Drive
San Diego, California 92123

Attention:        Mike McDonald
                  Chief Financial Officer

Re:      REMEC Inc. Trust 1998 A - Fifth Amendment ("Amendment") to the
         Participation Agreement, dated as of August 25, 1998 (the
         "Participation Agreement").

Dear Mike:

         This Fifth Amendment to the Participation Agreement (the "Fifth
Amendment"), dated as of January 31, 2001, is entered into among REMEC Inc., a
California corporation, as Lessee; Union Bank of California, N.A. not in its
individual capacity except as expressly stated herein but solely as Certificate
Trustee; the Persons named on Schedule 1-A of the Participation Agreement
(together with their respective permitted successors, assigns and transferees,)
as Certificate Purchasers; the Persons listed on Schedule 1-B of the
Participation Agreement (together with their respective permitted successors,
assigns and transferees), as Lenders; and Union Bank of California, N.A. as
Agent.

                                   WITNESSETH:

         Whereas, Lessee, Lessor, Agent, the Certificate Purchasers and the
Lenders have entered into that certain Participation Agreement, dated as of
August 25, 1998 (as amended by those certain First, Second, Third, and Fourth
Amendments to the Participation Agreement, dated as of September 29, 1998,
September 21, 1999, February 24, 2000, and April 20, 2000, respectively, the
"Participation Agreement") (capitalized terms used herein without definition
shall have the same meanings ascribed to them in Appendix 1 to the Participation
Agreement; and

         WHEREAS, the parties hereto desire to enter into this Amendment in
order to amend the Participation Agreement with respect to the matters provided
for in this Amendment.

         NOW, THEREFORE, in consideration of the foregoing premises, the mutual
terms and conditions herein contained, and for other good and valuable
consideration the

<PAGE>

receipt and sufficiency of which are hereby acknowledged, the parties hereto
agree as follows:

         Section 1. MODIFICATION TO PARTICIPATION AGREEMENT. The parties hereto
amend the Participation Agreement as follows and all references to the words
"Participation Agreement" shall hereinafter refer to the Participation Agreement
as amended by this Section 1.

                  1.1      Section 5.2 of the Participation Agreement is amended
and restated in its entirety to read as follows:

                           Section 5.2. LIENS. Lessee will not, and will not
permit any Subsidiary to, create, assume or suffer to exist any mortgage,
pledge, security interest, encumbrance, or lien (other than for taxes not
delinquent and for taxes and other items being contested in good faith) on
property of any kind, whether real, personal or mixed, now owned or hereafter
acquired, or upon the income of profits thereof except to Bank, except for (a)
minor encumbrances and easements on real property which do not affect its market
value, (b) existing liens on Lessee's personal property, (c) future purchase
money security interests encumbering only the personal property purchased or (d)
liens that may exist between February 1, 2001 and July 31, 2001 as related to
the acquisition of Pacific Microwave Corporation. Notwithstanding the foregoing,
Lessee shall not incur or suffer to exist any Lien on the Leased Property or
other Lease Collateral other than Permitted Liens.

                  1.2      Section 5.6 of the Participation Agreement is amended
adding section (k) to read as follows:

                           (k)      As soon as available, and in any event not
later than ninety (90) days after the commencement of each Fiscal Year, a
quarterly budget for that Fiscal Year including a consolidating balance sheet,
profit and loss statement, statement of cash flow and schedule of capital
expenditures all in reasonable detail.

                  1.3      Section 5.18 of the Participation Agreement is
amended and restated in its entirety to read as follows:

                           Section 5.18. BORROWINGS. Lessee will not, and will
not permit any Subsidiary to, borrow any money, become contingently liable to
borrow money, nor enter any agreement to directly or indirectly obtain borrowed
money, except: a) pursuant to agreements made with UBOC, b) loans and other
borrowings secured by liens permitted by Section 5.2, c) obligations incurred by
AirTech under shipside bond facilities referred to in Section 5.19(a)(iv), d)
related debt created through the acquisition of Pacific Microwave Corporation
from date of acquisition through July 31, 2001 and e) a Two Million Pound
Sterling (GBP 2,000,000) unsecured foreign exchange facility entered into by
AirTech Plc with National Westminster Bank, Plc.

                                       2
<PAGE>

                  1.4      Section 5.19 of the Participation Agreement is
amended and restated in its entirety to read as follows:

                           Section 5.19. LOANS, ADVANCES AND GUARANTIES. Lessee
will not, and will not permit any Subsidiary to, except in the ordinary course
of business as currently conducted, make any loans or advances, become a
guarantor or surety, pledge its credit or properties in any manner or extend
credit; provided, however, that lessee may (i) make loans or advances to its
Affiliates or Subsidiaries, (ii) guarantee the obligations of AirTech to
National Westminster Bank, Plc arising under the new foreign exchange facility
in an amount not to exceed Two Million Pounds Sterling (GBP 2,000,000), and
(iii) guarantee the obligations of AirTech arising under any shipside bond
facility in an amount not to exceed One Hundred Thousand Pounds Sterling (GBP
100,000).

                  1.5      Section 5.20 (b) of the Participation Agreement is
amended to read as follows:

                           (b)      Lessee's purchase of stock in Allgon AB
between September 1, 2000 and December 31, 2000 that did not exceed Fourteen
Million Dollars ($14,000,000) when converted from Swedish Krona to U.S. Dollars.

                  1.6      Section 5.21 of the Participation Agreement is
amended and restated in its entirety to read as follows:

                           Section 5.21. CHANGES/MERGERS. Lessee will not, and
will not permit any Subsidiary to (a) liquidate, dissolve or enter into any
consolidation, merger, partnership, joint venture or other combination, (b)
convey, sell or lease all or the greater part of its assets or business, or (c)
purchase or release all or the greater part of the assets or business of another
if the total purchase price exceeds Thirty Million Dollars ($30,000,000) or the
cash consideration exceeds Fifteen Million Dollars ($15,000,000) except for: (i)
the acquisition of Pacific Microwave Corporation by March 31, 2001 and (ii) the
sale of Humphrey Inc. assets.

                  1.7      Section 5.24 of the Participation Agreement is added
to read as follows:

                           Section 5.24. FUTURE SUBSIDIARIES. Lessee shall cause
each Domestic Subsidiary formed or acquired after the closing date of this
agreement to execute and deliver an appropriate Subsidiary Guaranty and Security
Agreement in form and substance satisfactory to Bank. As requested by Bank,
Lessee shall cause each Foreign Subsidiary formed or acquired after the closing
date of this agreement to deliver an appropriate Subsidiary Guaranty in form and
substance satisfactory to Bank and or pledge 65% of the capital stock of the
Subsidiary if the Subsidiary or Subsidiaries combined have tangible assets in
excess of 5% of the total tangible assets of Borrower

                                       3
<PAGE>

and its Subsidiaries on a consolidated basis as at the end of the fiscal year
then most recently ended.

         Section 2. REPRESENTATIONS AND WARRANTIES. Lessee represents and
warrants to each of the other parties hereto that each of the representations
and warranties of Lessee contained in the Participation Agreement and in each
other Operative Document is true and correct in all material respects on the
date hereof, with the same effect as though made on and as of such date and, for
purposes of this paragraph, all references in such representations and
warranties to the "Operative Documents" shall be deemed to include this
Amendment.

         Section 3. EFFECTIVENESS. Subject to the execution and delivery of this
Amendment by all parties hereto, this Amendment is entered into as of the date
set forth in the preamble to this Amendment, but effective, however, as of
January 31, 2001 (the "EFFECTIVE DATE").

         Section 4. APPLICABLE LAW. THIS AMENDMENT HAS BEEN DELIVERED IN, AND
SHALL IN ALL RESPECTS BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS
OF, THE STATE OF CALIFORNIA, WITHOUT REGARD TO CONFLICTS OF LAW PRINCIPLES OF
SUCH STATE.

         Section 5. COUNTERPARTS. This Amendment may be executed in any number
of counterparts and by different parties hereto on separate counterparts, each
executed counterpart constituting an original but all together one agreement.

         Section 6. DIRECTION TO TRUSTEE. By signing this Amendment, the
Participants authorize and direct Union Bank of California, N.A., as Certificate
Trustee, and Union Bank of California, N.A., as Agent, to sign this Amendment.

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed and delivered as of the date first above written.

Lessee:                              REMEC, INC., a California corporation,
                                     as Lessee

                                     By:  /s/ Michael McDonald
                                        ----------------------------------------
                                     Name Printed:  Michael McDonald
                                     Title:  Chief Financial Officer

                                       4
<PAGE>

Certificate Trustee                  UNION BANK OF CALIFORNIA, N.A.,
                                     not in its individual capacity except
                                     as expressly stated herein, but solely
                                     as Certificate Trustee

                                     By: /s/ Vivian R. Savedra
                                        ----------------------------------------
                                     Name Printed:  Vivian R. Savedra
                                     Title:  Assistant Vice President

Agent:                               UNION BANK OF CALIFORNIA, N.A. not in
                                     its individual capacity except as expressly
                                     stated herein, but solely as Agent

                                     By: /s/ Rick Young
                                        ----------------------------------------
                                     Name Printed:  Rick Young
                                     Title:  Vice President

Certificate Purchaser:               BANKERS COMMERCIAL CORPORATION,
                                     as Certificate Purchaser

                                     By: /s/ Lance B. Markowitz
                                        ----------------------------------------
                                     Name Printed:  Lance B. Markowitz
                                     Title:  President

Lender:                              UNION BANK OF CALIFORNIA, N.A.,
                                     not in its individual capacity except
                                     as expressly stated herein, but solely
                                     as Lender

                                     By: /s/ Rick Young
                                        ----------------------------------------
                                     Name Printed:  Rick Young
                                     Title:  Vice President

                                       5

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