Document:

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                                                                   EXHIBIT 10.1

                             JOINT VENTURE AGREEMENT

THIS JOINT VENTURE AGREEMENT is made on the 20th of December 2001 by and among:

1. Celeritek Inc., a corporation duly organized and validly existing under the
Laws of California, having its principal office at 3236 Scott Blvd., Santa
Clara, California, and its permitted successors, assigns and wholly-owned
subsidiaries (hereinafter referred to as "Celeritek");

2. UBE Electronics, Ltd., a corporation duly organized and validly existing
under the Laws of Japan, having its principal office at 2023-2 Aza-Mugigawa
Okubun, Ohmine-cho, Mine city, Yamaguchi Pref., 759-2214, Japan, and its
permitted successors, assigns and wholly-owned subsidiaries (hereinafter
referred to as "UBE").

3. Newgen Co., Ltd., a corporation duly organized and validly existing under the
Laws of Korea, having its principal office at 124-4 #400, Ojeon-Dong,
Uiwang-City, Kyungki-Do, Korea, and its permitted successors and assigns
(hereinafter referred to as the "Company").

Celeritek, UBE, and any assignees pursuant to this Agreement of Celeritek or UBE
are herein collectively referred to as the "Investors." Each of the Investors
and the Company are herein referred to individually as a "Party" and
collectively or respectively as applicable as the "Parties."

                                   WITNESSETH:

WHEREAS, Celeritek is engaged in the design and manufacture of gallium arsenide
semiconductor components and gallium arsenide-based subsystems used in the
transmission of voice, video and data over wireless communication networks;

WHEREAS, UBE is engaged in the design and manufacture of ceramic components and
ceramic base subsystems used in the mobile telecommunication systems.;

WHEREAS, the Company is engaged in the design of personal cellular handsets used
in the CDMA and GSM telecommunication systems.

WHEREAS, the Parties hereto, subject to the terms and conditions set forth
herein, desire to jointly enter into a venture (the "Venture") to reorganize the
Company into a Foreign Capital Invested Company for the purposes of designing
and developing handsets as per the order of phone manufactures and phone
companies from time to time in accordance with the provisions of this Agreement
(the "Business," as further defined herein); and

WHEREAS, the Parties hereto desire to enter into this Agreement to outline the
overall framework for the Venture and the Business and define the relationship
of the Investors individually as amongst themselves and collectively as between
them and the Company by establishing certain terms and conditions under which
shares in the Company are to be held.

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NOW, THEREFORE, in consideration of the mutual promises and covenants set forth
herein, the Parties hereby agree as follows:

                             ARTICLE 1. DEFINITIONS

1.1 In this Agreement, the following expressions shall, unless the context
otherwise requires, have the following meanings:

        1.1.1 "Agreement" shall mean this Joint Venture Agreement as in effect
        on the date hereof, all Exhibits and Schedules attached hereto and other
        instruments, documents and/or agreements relating to this Agreement
        which are concluded between the parties hereto on or before the date
        hereof or which are incorporated herein by reference, and all other
        instruments, documents and/or agreements relating to this Agreement
        hereafter agreed upon from time to time in accordance with the terms
        hereof.

        1.1.2 "Business" shall mean the business of the Company from time to
        time in accordance with the meaning specified in the Recitals above and
        in Article 3 below.

        1.1.3 "Business Day" shall mean any day on which banking institutions
        are open for normal business in Seoul, Korea.

        1.1.4 "Common Company Shares" shall mean any common stock issued or
        issuable by the Company.

        1.1.5 "Company Shares" shall mean all classes of stock and securities
        convertible to any class of stock, previously issued, issuable in
        accordance with this Agreement, or issued at any time in the future by
        the Company.

        1.1.6 "Execution Date" shall mean the date first above written.

        1.1.7 "Foreign Capital Invested Company" shall mean a company, organized
        and registered in Korea, in which a non-Korean national or foreign
        Person has invested capital pursuant to the Foreign Investment Promotion
        Act of Korea.

        1.1.8 "Governmental Approval" shall mean all consents, approvals,
        certificates, filings, franchises, licenses, orders, permits, variances
        or similar authorizations and rights to be obtained from or filed with
        any Korean Governmental Authority required or necessary for any action
        of a Party in connection with those contemplated in this Agreement.

        1.1.9 "Governmental Authority" shall mean any national, regional,
        provincial, local, municipal or other political subdivision thereof,
        administrative, regulatory, judicial, legislative, executive, police or
        taxing governmental authority of any nature, including any ministry,
        agency, bureau, or entity, official, or court having jurisdiction.

        1.1.10 "Investor Shares" shall mean the Preferred Company Shares
        issuable to the Investors in accordance with this Agreement or, as
        regarding such Preferred Company Shares, issuable pursuant to any stock
        split, dividend, recapitalization or any other distribution.

        1.1.11 "Law" shall mean any law, rule, regulation, order, ordinance,
        code, injunction, judgment or decree, or other similar judicial or
        Governmental Authority pronouncements having compulsive legal effect.

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        1.1.12 "New Articles" shall mean the Company's Articles of Incorporation
        as amended and adopted by the Shareholders at a shareholders meeting
        convened within [ten (10)] Business Days after the Effective Date to
        conform with the terms and conditions of this Agreement.

        1.1.13 "Person" shall mean an individual or a corporation, association,
        partnership, limited liability company, joint venture, joint stock
        company, organization, business trust or any other entity or
        organization, including governmental entities or organizations.

        1.1.14 "Preferred Company Shares" shall mean any preferred class of
        voting stock or securities issued or issuable by the Company that have
        any preferential rights over Common Company Shares.

        1.1.15 "Shareholders" shall mean the existing shareholders of the
        Company as of the Effective Date, as identified in Schedule 1 hereto,
        together with Celeritek and UBE.

1.2 Unless the context otherwise requires, words importing the singular shall
include the plural and vice versa, the headings in this Agreement have been
inserted for convenience of reference only and shall not be used in construing
or interpreting this Agreement, and references to "Korea" shall mean the
Republic of Korea.

                               ARTICLE 2. PURPOSE

The purpose of this Agreement is to agree upon the terms and conditions under
which the Company shall become a joint venture company and pursue the Business.

                             ARTICLE 3. THE BUSINESS

The Business of the Company shall be to:

3.1 Engage in the business of designing, developing, marketing, promoting, and
distributing handsets for cellular and related phone devices (the "Products").

3.2 Pursue the objectives of Section 3.1 above as per the Company's own
initiative and, from time to time, as per the order of cell phone manufactures
and wireless phone companies in Korea and elsewhere.

3.3 Undertake the foregoing objectives with the understanding that, in
accordance with Section 4.7 below, Celeritek and UBE will be the preferred
supplier to the Company of the respective items and constituent parts it
provides to the Company from time to time and that are used in the manufacture
of the Products provided that the parts are technically competitive.

3.4 Engage in any and all acts, things, businesses and activities, which are
related, incidental or conducive directly or indirectly to the attainment of the
foregoing objectives.

                    ARTICLE 4. RESPONSIBILITIES OF EACH PARTY

4.1 Prior to the Execution Date or simultaneously therewith, the Company shall
file a report, on behalf of Celeritek and UBE as foreign investors, with the
Korea Exchange Bank in accordance with the Foreign Investment Promotion Act for
establishing the Company as a Foreign Capital Invested Company and, shall apply
for the approval of the Korean Exchange Bank for the transfer into Korea of the
foreign currency equivalent of the Investors' capital contributions in
accordance with Article 5 and Schedule 1 hereof. The

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Investors shall provide reasonable assistance to the Company in connection with
such filing, or any other related requirement, upon the Company's reasonable
request.

4.2 The Company shall have the responsibility for obtaining all Governmental
Approvals from time to time and arising out of, or in connection with, the
implementation of the Products, the Business and this Venture in the form and
substance mutually agreed upon by both Parties.

4.3 Each Party will jointly and individually use their respective commercially
reasonable endeavors to ensure that the Company shall comply with Law and
continue to maintain and hold all such necessary license(s), approval(s) or
permit(s) of any and all relevant Governmental Authorities.

4.4 The Company shall promptly notify the Investors in writing of any
registrations or filings required to obtain copyright, trademark, or patents, in
their respective names in Korea. The Company shall use commercially reasonable
endeavors to assist the Investors in completing such filings or registrations or
in obtaining such Government Approvals.

4.5 Each Party shall forthwith, in writing, inform the other Party upon it
coming to its attention that an obligation pursuant to this Article 4 has been
satisfied or has been refused or rejected by a competent Governmental Authority.

4.6 The Company's New Articles shall be mutually drafted and agreed upon by the
Parties hereto within [ten (10)] Business Days of the Execution Date (or such
later date as the Parties may agree in writing) and shall be in conformity with
the terms and conditions of this Agreement. If any discrepancy is found between
this Agreement and the New Articles, the Parties shall, in accordance with the
terms of this Agreement and applicable Korean Law, amend the New Articles to
conform with this Agreement.

4.7 The Company agrees that it shall, at the earliest convenience after the
Execution Date, enter into subsequent agreements and understandings with
Celeritek and UBE whereby Celeritek and UBE will be the preferred suppliers
having first rights to supply to the Company of certain parts and items that
they manufacture for the Products of the Company to be produced given that the
parts are technically competitive in accordance with the terms of this
Agreement.

                         ARTICLE 5. CAPITAL SUBSCRIPTION

5.1 The Company shall cause to be issued two hundred thirteen thousand two
hundred (213,200) new shares of Preferred Company Shares having a par value Five
Hundred Korean Won (KRW 500) per share and at price per share of six thousand
ninety eight Korean Won (KRW 6,098),"original issued price". In accordance with
the figures of Schedule 1, Celeritek shall subscribe to and purchase one hundred
six thousand six hundred (106,600) Preferred Company Shares, equivalent to ten
percent (10%) ownership equity in the Company, for an aggregate consideration of
Six Hundred Fifty Million Korean Won (KRW 650,000,000) ("Celeritek's Purchase
Price"), and UBE shall subscribe to and purchase one hundred six thousand six
hundred (106,600) Preferred Company Shares, equivalent to ten percent (10%)
ownership equity in the Company, for an aggregate consideration of Six Hundred
Fifty Million Korean Won (KRW 650,000,000) ("UBE's Purchase Price").

        5.1.1 Simultaneously with the execution of this Agreement, the Company
        shall immediately transfer title to one hundred six thousand six hundred
        (106,600) shares of the Investor Shares, constituting ten percent (10_%)
        of the new issue, to Celeritek, and in exchange thereof, Celeritek shall
        pay (by wire transfer to an account designated by the Company)
        Celeritek's Purchase Price within ten (10) Business Days of the
        Execution Date.

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        5.1.2 Simultaneously with the execution of this Agreement, the Company
        shall immediately transfer title to one hundred six thousand six hundred
        (106,600) shares of the Investor Shares, constituting ten percent (10%)
        of the new issue, to UBE, and in exchange thereof, UBE shall pay (by
        wire transfer to an account designated by the Company) UBE's Purchase
        Price within ten (10) Business Days of the Execution Date.

5.2 From time to time, the shareholding proportions of the Parties may be
reduced as current Company Shares are transferred or new Company Shares are
issued in accordance with the New Articles; provided, however, Celeritek and UBE
will have rights to purchase new Company shares in accordance with section 6.6
so that the proportion of Company Shares held by Celeritek shall never be less
than ten percent (10%) of all issued and outstanding Company Shares, on an
as-converted basis, and that the proportion of Company Shares held by UBE shall
never be less than ten percent (10%) of all issued and outstanding Company
Shares, on an as-converted basis; provided, further, however, that under no
circumstances will any Investor be required to tender any consideration
whatsoever for Company Shares issued, transferred or granted to the Investors by
the Company pursuant to this Section 5.2.

5.3 Any additional Company Shares shall only be authorized and/or issued upon an
affirmative vote of the Board, valid under Korean Law, the New Articles and the
terms and conditions of this Agreement, in which majority of the directors of
the Company vote in favor of such resolution.

5.4 Any Party or other Person subscribing from time to time for Company Shares
shall tender payment for such in cash or such other form as set forth at the
sole and absolute discretion of the Board. In the event of a share transfer or
new issue of Company Shares subsequent to the subscriptions contemplated by this
Agreement, the transferee or subscriber shall, as a condition precedent to such
transfer, deliver a written undertaking to the Parties hereto, in form and
substance acceptable to them, to the effect that the transferee or subscriber
shall observe and be bound by all provisions of this Agreement and any
agreements related hereto as if such transferee or a subscriber were a Party
hereto and/or thereto.

5.5 The Parties shall not pledge, sell, transfer, or otherwise encumber or
dispose of all or any Company Shares without the prior written consent of the
other Parties and unless in accordance with Section 24.1 below; provided,
however, that Investors may transfer its Company Shares to its affiliates or
subsidiaries or any other third party which controls the Investor, or is under
common control with the Investor, without the requirement to obtain such consent
of the Company hereto.

                       ARTICLE 6. RIGHTS OF THE INVESTORS

6.1 The Investor Shares shall have full voting rights pursuant to this Agreement
and the New Articles, and shall be evidenced by share certificates in non-bearer
form delivered to each Investor by the Company in accordance with the terms and
conditions of Section 5.1 above.

6.2 Dividends. The Investors shall each be entitled to receive dividends on the
Investor Shares, out of any assets legally available therefore, prior and in
preference to any declaration or payment of any dividend (payable other than in
Common Company Shares or other securities and rights convertible into or
entitling the holder thereof to receive, directly or indirectly, additional
shares of the Common Company Shares) on the Common Company Shares or any other
Company Preferred Shares, at the rate of Five Hundred Korean Won (KRW 500) per
share per annum (as adjusted to take into account any stock splits, stock
dividends, recapitalizations or the like) or, if greater (as determined on a per
annum basis and on an as converted basis), an amount equal to that paid on any
other outstanding Company Shares, payable when, as, and if declared by the
Board. Such dividends shall be cumulative.

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6.3     Liquidation Preference.

        6.3.1 In the event of any liquidation, dissolution or winding up of the
        Company, either voluntary or involuntary, the Investors shall each be
        entitled to receive, prior and in preference to any distribution of any
        of the assets of the Company to the holders of Common Company Shares or
        other Preferred Company Shares by reason of their ownership thereof, an
        amount per share equal to the sum of six thousand ninety eight Korean
        Won (KRW 6098) for each outstanding Investor Share (the "Original Issue
        Price"), plus declared but unpaid dividends on such share (subject to
        adjustment of such fixed Korean Won amount for any stock splits, stock
        dividends, combinations, recapitalizations or the like). If upon the
        occurrence of such event, the assets and funds thus distributed to the
        Investors shall be insufficient to permit the payment to such holders of
        the full aforesaid preferential amounts, then the entire assets and
        funds of the Company legally available for distribution shall be
        distributed ratably among the Investors in proportion to the amount of
        such shares owned by each Investor. For purposes of this Article 6, a
        merger, acquisition or sale of substantially all of the assets of the
        Company shall be considered liquidation.

        6.3.2 Upon the completion of the distribution required by Section 6.3.1
        above, the remaining assets of the Company available for distribution to
        Shareholders shall be distributed among the remaining holders of
        Preferred Company Shares, including the Investors and Common Company
        Shares pro rata based on the number of shares of Common Company Shares
        held by each (assuming full conversion of all such Preferred Company
        Shares) until with respect to the holders of preferred shares, including
        the Investors, such holders shall have received an aggregate of six
        thousand ninety eight Korean Won (KRW 6098) per share (as adjusted for
        any stock splits, stock dividends, recapitalizations or the like)
        (including amounts paid pursuant to Section 6.3.1 above; thereafter, if
        assets remain in the Company, the holders of the Common Company Shares
        shall receive all of the remaining assets of the Company pro rata based
        on the number of shares of Common Company Shares held by each.

6.4     The Investor Shares shall not be redeemable.

6.5     Conversion. The Investors shall have the following conversion rights
        (the "Conversion Rights"):

        6.5.1 Right to Convert. Each Investor Share shall be convertible, at the
        option of the respective holding Investor, at any time after the date of
        issuance of such share, into such number of fully paid and nonassessable
        Common Company Shares as is determined by dividing the Original Issue
        Price by the conversion price applicable to such share, as determined in
        good faith by the Board, in effect on the date the certificate is
        surrendered for conversion; provided, however, that such conversion
        price shall never be greater than the Original Issue Price. The initial
        conversion price per share for an Investor Share shall be the Original
        Issue Price. Conversion price shall be subject to adjustment which shall
        be effected upon the Board's approval if and to the extent necessary to
        make a for dilution in economic value of the investor shares which may
        result from stock split, stock dividend.

        6.5.2 Automatic Conversion. The Investor Shares shall automatically be
        converted into Common Company Shares immediately upon the earlier of (i)
        the Company's sale of its Common Company Shares in a firm commitment
        underwritten public offering pursuant to a registration statement or
        equivalent thereof filed in accordance with Korean Law or (ii) the date
        specified by written consent or agreement of the holders of a majority
        of the then outstanding Investor Shares.

        6.5.3 Mechanics of Conversion. Before an Investor is entitled to convert
        any Investor Shares into Common Company Shares, such Investor shall
        surrender its share certificates, duly endorsed to the Company, and
        shall give written notice to the Company of the election. The Company
        shall, as soon

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        as practicable thereafter, issue and deliver a certificate or
        certificates for the number of Common Company Shares to which such
        investor is entitled.

        6.5.4 Recapitalizations. If at any time or from time to time there shall
        be a recapitalization of the Common Company Shares, the Investors along
        with other holders of Preferred Company Shares shall thereafter be
        entitled to receive upon conversion of Preferred Company Shares the
        number of shares or other securities or property of the Company to which
        a holder of Common Company Shares deliverable upon conversion would have
        been entitled on such recapitalization.

        6.5.5 No Fractional Shares. No fractional shares shall be issued upon
        the conversion of any Investor Share. In lieu of any fractional shares
        to which an Investor would otherwise be entitled, the Company shall pay
        cash equal to such fraction multiplied by the then applicable conversion
        price.

        6.5.6 Reservation of Stock Issuable Upon Conversion. The Company shall
        at all times reserve and keep available out of its authorized but
        unissued Common Company Shares, solely for the purpose of effecting the
        conversion of the Investor Shares, such number of its Common Company
        Shares as shall from time to time be sufficient to effect the conversion
        of all outstanding Investor Shares.

6.6     Right of First Refusal. The Investors shall have the following rights of
        first refusal:

        6.6.1 Subject to applicable Law and the New Articles, the Investors
        shall have rights of first refusal with respect to any new issuance of
        Company Shares in the same ratio as their respective shareholding ratios
        established in connection with the terms of this Agreement. In the event
        that the Company wishes to undertake a new issuance of Company Shares,
        the Company shall first give each Investor prior written notice of its
        intention that describes the type of new Company Shares and the price,
        terms and conditions upon which the Company proposes to issue the same.
        Each Investor shall have fifteen (15) Business Days from the day of
        receiving such notice to provide written notice back to the Company of
        its intent to purchase up to its pro rata share of such new Company
        Shares.

        6.6.2 In the event an Investor does not exercise such Investor's rights
        to purchase such new Company Shares, the Company shall have one hundred
        twenty (120) days to issue or sell such new Company Shares at a price
        and terms and conditions that are no more favorable than those specified
        in the Company's notice to the Investors. After the expiration of such
        120-day period, the Company shall not thereafter issue or sell such
        remaining new Company shares without first offering such new Company
        Shares again to the Investors in accordance with this Section 6.6.

6.7 No Impairment. The Company will not through any reorganization,
recapitalization, transfer of assets, consolidation, merger, dissolution, issue
or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms to be observed or performed
hereunder by the Company but will at all times in good faith assist in the
carrying out of all the provisions of this Article 6 and in the taking of such
action as may be necessary or appropriate in order to protect the conversion
rights of the Investors against impairment.

               ARTICLE 7. MEETINGS AND RESOLUTIONS OF SHAREHOLDERS

7.1 The Board shall decide the time and place for convening all meetings of the
Shareholders except where Korean Law provides otherwise. Written notice in
English stating the place, day and hour of the meeting and, in case of a special
meeting the purposes for which the meeting is called, shall be delivered not
less than fifteen (15) Business Days before the date of the meeting to all
Shareholders.

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7.2 With respect to the Investors' rights as Shareholders under this Agreement,
the Company shall not, without the prior written consent of the holders of a
majority of the Investor Shares:

        7.2.1 increase or decrease (other than by conversion or as otherwise
        required or permitted under this Agreement) the total number of
        authorized Investor Shares;

        7.2.2 alter or change the powers, preferences or rights of the Investor
        Shares, or the qualifications, limitations or restrictions thereof;

        7.2.3 amend its New Articles if such amendment would adversely affect
        the rights, preferences, privileges or limitations of the Investor
        Shares in a manner different from other holders of Company Shares or in
        a manner inconsistent with this Agreement; or

        7.2.4 authorize or issue, or obligate itself to authorize or issue
        (including by reclassification or otherwise) any other equity security
        (including without limitation any Preferred Company Shares or other
        preferred security) having any preference or priority over, or ranking
        senior to, the Investor Shares with respect to any rights set forth in
        this Agreement, including but not limited to rights to dividends or
        other distributions and rights upon liquidation, dissolution or
        winding-up.

        7.2.5 liquidation, merger or sale of the Company or substantially all of
        the assets of the Company.

7.3 With respect to the rights of all Shareholders, the Company shall not,
without the majority consent of the Shareholders and in accordance with Korean
Law, adopt any actions or resolutions with respect to: (i) amendment of its
articles of incorporation or bylaws; and (ii) declaring or paying dividends to
any class of Company Shares.

7.4 All general meetings of Shareholders shall be conducted both in Korean and
English, and in the event of any conflict between the Korean and English
versions of the minutes the English language version shall prevail. Such English
versions of the minutes will be provided to each Investor within five (5)
Business Days of the meeting date.

7.5 All actions and resolutions of the Shareholders shall be adopted by the
affirmative vote of a majority of the Company Shares represented at the meeting
where more than one-half (1/2) of the total number of issued and outstanding
Company Shares are represented, unless otherwise required by this Agreement or
under Korean Law.

                          ARTICLE 8. BOARD OF DIRECTORS

8.1 Each Investor will exercise its respective voting rights in the Company and
take such other steps as are necessary to ensure; and the Company shall also
take any step necessary to ensure:

        8.1.1 that the Board of Directors of the Company, as from time to time
        hereafter duly constituted and acting in accordance with the New
        Articles and this Agreement, shall consist of five (5) members (the
        "Board");

        8.1.2 that of such members, one (1) shall be nominated by Celeritek, one
        (1) shall be nominated by UBE, two (2) shall be nominated by the
        Company, and the remaining director shall be the CEO of the Company, or
        with similar titles and duties, as nominated and approved pursuant to
        Section 8.3 below. Each Party shall exercise its respective voting
        rights and take such other steps as are necessary to

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        procure the nomination and election of Persons nominated by the other
        Parties pursuant to this Section 8.1.2;

        8.1.3 the Parties shall cause an extraordinary meeting of Shareholders
        to be convened no later than ten (10) Business Days after the Execution
        Date to elect those Persons initially designated, respectively, as the
        Celeritek, UBE and Company nominees and, the Parties agree to shorten
        the statutorily required notice period to ten (10) Business Days for the
        convening of such extraordinary meeting; and

        8.1.4 that if any Party wishes to change its nominated directors with or
        without cause the other Party will vote accordingly; provided, however,
        that if such dismissal is without cause, the Party proposing the
        dismissal shall indemnify and hold the other Party harmless from any and
        all damages and any other expenses arising from, or in connection with
        such action.

8.2 The Company shall nominate the chairman of the Board. Each Investor will
have the right to approve in writing such nomination, provided that such
approval shall not be unreasonably withheld. The remainder of the Board shall
agree to exercise their respective votes in accordance with the terms of this
Agreement and the New Articles and take such other steps as are necessary to
elect such director as the chairman.

8.3 The Company shall nominate the Representative Director of the Company, who
shall serve as the chief executive officer ("CEO"). Each Investor shall have the
right to approve in writing such nomination, provided that such approval shall
not be unreasonably withheld. The remainder of the Board shall agree to exercise
their respective votes in accordance with the terms of this Agreement and the
New Articles and take such other steps as are necessary to elect such director
as the CEO.

8.4 If the position of any director becomes vacant for any reason, a Person
shall be nominated for the vacancy by the same Party who nominated the director
whose office is vacant and, the other Parties agree to cause their shares to be
voted and take such other steps as are necessary to elect such Person to the
vacancy.

                    ARTICLE 9. RESOLUTIONS OF BOARD MEMBERS

9.1 With respect to the Investor's rights as Shareholders under this Agreement,
the Company shall not approve, without the affirmative consent of at least
two-thirds of the total number of board members of the Company:

        9.1.1 any matter requiring a special resolution of the Shareholders of
        the Company under the applicable Laws of Korea;

        9.1.2 any winding up, dissolution, liquidation, bankruptcy, corporate,
        reorganization, composition, insolvency or recapitalization of the
        Company or any subsidiary of the Company (for purposes of this Article
        9, a "Company Subsidiary");

        9.1.3 the appointment or removal of the CEO, chief operations officer,
        chief financial officer or other key officers, and their respective
        annual compensation by the Company;

        9.1.4 adoption of an annual business plan and budget of the Company or
        any Company Subsidiary;

        9.1.5 any dividend or other distribution;

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        9.1.6 any appointment or replacement of the Company's local and
        international accountants and any material change in accounting policies
        or practices of the Company, any adoption of an annual audited financial
        statements and annual dividend payments or any change of fiscal year of
        the Company or any Company Subsidiary;

        9.1.7 direct or indirect establishment of a Company Subsidiary or the
        disposition of interests in any Company Subsidiary;

        9.1.8 any deviation from the annual budget of the Company or any Company
        Subsidiary by more than ten percent (10%) in excess of cumulative levels
        approved in its annual budget, including with respect to: operating
        expense, selling, general and administrative expenses, advance payments,
        indebtedness or other financial obligations, capital expenditures;

        9.1.9 sale, transfer of disposition of any material property or assets,
        real or personal, tangible or intangible, of the Company or any Company
        Subsidiary, in each case in an amount exceeding ten percent (10%) of its
        total assets of such Company or Company Subsidiary, other than in the
        ordinary course of the business;

        9.1.10 incurrence of indebtedness in excess of US$500,000 or provision
        of guarantees of third party obligations;

        9.1.11 the merger, consolidation or other business combination of the
        Company or any Company Subsidiary with or into any person, including
        acquisition of substantially all of the assets or capital stock of any
        person, or entry into any partnership or joint venture arrangement;

        9.1.12 any change in the authorized number or shares of the Company, and
        any issuance of shares warrants or stock options, or stock repurchase,
        split, consolidation or other change affecting the number or rights or
        issued shares;

        9.1.13 allocation of any unsubscribed shares in an offering of shares in
        an amount exceeding three percent (3%) or the total outstanding shares
        of the Company to any third party and any offer by the Company of any
        shares for public subscription or purchase;

        9.1.14 the listing or delisting of shares of the Company or of any
        Company Subsidiary;

        9.1.15 any contract or transaction between the Company or any Company
        Subsidiary and any director or officer of the Company or any Subsidiary
        or the Company, directly or indirectly, which is not in the ordinary
        course of business;

        9.1.16 commencement or settlement of any litigation involving more than
        US$500,000; or

        9.1.17 any amendment to the Company's articles of incorporation or
        bylaws to the extent such amendment shall not be inconsistent with
        Article 6 and Sections 7.2 and 8.1;

        9.1.18 the execution, amendment or termination any agreement to share
        all or a substantial part of the profits and/or losses of the Company's
        business;

        9.1.19 any transfer of the Company's shares by any shareholder to a
        third party, to the extent such approval is required by this Agreement
        or any other agreement by and between the Company and any of its
        shareholders; or

<PAGE>

        9.1.20 any change in the number of the Board directors of the Company.

             ARTICLE 10. MEETINGS AND RESPONSIBILITIES OF THE BOARD

10.1 The Board may exercise all powers to direct the Company that are not
specifically reserved for the Shareholders meetings under Korean Law, this
Agreement, or the New Articles.

10.2 The CEO shall, throughout the term of this Agreement:

        10.2.1 represent the Company and stand in charge of the administration
        of the day-to-day business affairs of the Company in accordance with the
        policies established by the Board and Shareholders meetings;

        10.2.2 provide, in accordance with Article 12 below, to the Investors
        and the Board (i) unaudited, but reviewed by an independent accountant,
        quarterly financial statements, including balance sheet, profit and loss
        statement, and cash flow statement, together with a report on operations
        for the period covered by the financial statements, for each quarter as
        they are prepared but in no event more than ten (10) Business Days after
        the end of each quarter of each fiscal year, and (ii) audited, by an
        independent accountant, financial statements, including balance sheet,
        profit and loss statement, and cash flow statement, together with a
        report on operations for the period covered by the financial statements,
        for each fiscal year as they are prepared but in no event more than
        sixty (60) Business Days after the close of each fiscal year covered by
        the financial statement;

        10.2.3 prepare an annual business plan in regards to the operations and
        the business of the Company for approval by the Board in accordance with
        the terms of this Agreement and the New Articles; and

        10.2.4 be subject to and have a duty to comply with the decisions and
        guidance of the Board and Shareholders.

10.3 Company shall nominate a statutory auditor; provided, however, that such
Person may not concurrently serve as a director of the Company. The Shareholders
shall agree to exercise their respective votes and take such other steps as are
necessary to elect such auditor.

10.4 Meetings of the Board may be called from time to time by any director of
the Board when such director deems the same to be necessary or advisable.
Written notice stating the place, day and hour of the meeting and, in case of a
special meeting, the purposes for which the meeting is called, shall be
delivered not less than fifteen (15) Business Days before the date of the
meeting to the remainder of the Board.

10.5 Unless otherwise required by Korean Law or this Agreement, a quorum at any
Board meeting shall consist of the entire Board then in office from time to time
and, all actions and resolutions taken by the Board shall be adopted by the
affirmative vote of a majority of the entire Board.

10.6 No member of the Board, including the chairman of the Board, shall have the
right to cast more than one vote as a tie-breaking vote, and the Parties agree
that a provision shall be included in the New Articles to that effect.

10.7 With respect to the decisions made by the Board, should a director be a
related or interested party to a transaction or series of transactions to be
approved by the Board where the transaction is outside the ordinary course of
business and the value in the aggregate of which exceeds one hundred million
Korean Won (KRW100,000,000), any such director shall immediately disclose such
relationship or interest to the

<PAGE>

transaction to the Board, be excluded from any decision-making process, and
shall abstain from voting at a meeting of the Board regarding such transaction;
provided, however, where said director fully discloses to the Board the scope of
such relationship or interest that director may still exercise the normal rights
of his position in that situation if the unrelated or uninterested remainder of
the Board unanimously votes to allow the director to do so.

10.8 Meetings of the Board will be conducted in Korean with mandatory
simultaneous English translations and all minutes of the meetings shall be
prepared both in Korean and English. In the event of any conflict between the
Korean and English versions of the minutes, the English language version shall
prevail. Such English version of the minutes will be provided to the Investors
within five (5) Business Days of said meetings.

               ARTICLE 11. BASIC CORPORATE AND OPERATING POLICIES

11.1 The Parties agree to exercise their voting rights and cause their
respective nominees, directors, and other representatives to effectuate the
policies set forth in this Agreement and those other policies arising out of, or
in connection with, or surrounding the effective implementation and maintenance
of the objectives mutually contemplated throughout this Agreement during the
term hereof.

11.2 The general policies of the Company regarding salaries, bonuses and other
remunerations of the Board and officers of the Company shall be reviewed
annually by the Parties in consultation with the Board and, general practice
current in Korea shall be taken into consideration. Board compensation and
severance pay shall be determined in accordance with regulations adopted by the
Shareholders.

                       ARTICLE 12. ACCOUNTING AND AUDITING

12.1 The books and records of the Company shall be maintained in accordance with
generally accepted accounting principles of Korea and shall accurately reflect
the Company's financial position. Such records and supporting documents shall be
available for inspection by the Investors and/or any of their designees at all
reasonable times. Each Investor may, at its own expense, request an audit of
such records by an independent public accountant of their selection, other than
the independent public accounting firm used by the Company for its annual audit.

12.2 The Parties hereto agree to cause the books and records of the Company to
be audited at the end of each fiscal year, which shall be December 31, during
the term of this Agreement by an independent public accounting firm of
international repute licensed to practice in Korea and chosen by the Company
("Annual Audit"). Such accounting firm shall yearly provide the Parties with a
financial report in English and Korean in accordance with generally accepted
accounting principles of both Korea and the United States. Copies of such Annual
Audits shall be provided to the Parties hereto at the Company's expense in
accordance with the requirements of Section 10.2.2 above. Subject to the
approval of the Shareholders, such Annual Audits shall be final and binding upon
the Parties as to the revenue, costs, fees, expenses, losses and profits of the
Company, absent manifest error or fraud.

12.3 All financial statements and reports prepared by the Company or its
auditors and provided to the Investors in accordance with the terms of Section
10.2.2 above and this Article 12 shall be submitted in both English and Korean
at the Company's expense. In the event of any conflict between the Korean and
English versions, the English language version shall prevail.

<PAGE>

                   ARTICLE 13. REPRESENTATIONS AND WARRANTIES

13.1 Each Party warrants and represents to the other party that (i) it is duly
organized and in good standing; (ii) it has all necessary corporate power and
authority to enter into this Agreement; (iii) it has duly authorized the Venture
by all corporate action necessary for such authorization; (iv) the intended
Venture does not violate any charter document of such Party or judicial order
binding on such Party; (v) the Agreement constitutes a valid and legally binding
obligation of each Party; and (vi) it has no outstanding commitments or
obligations which would impede its ability and right to enter into this
Agreement and/or fulfill its obligation hereunder except those which have been
disclosed in writing to the other Parties at the time of execution of this
Agreement.

13.2 As of the date of this Agreement, the Company has and will have exclusive
right, power and authority to issue and transfer the Investor Shares to the
Investors in accordance with the terms of this Agreement.

13.3 The Investor Shares to which the Investors will subscribe hereunder shall
be free and clear of all charges, liens, encumbrances, equities or other adverse
or third Person rights, options, claims or interests, and with all rights,
benefits, and entitlements as of the Execution Date, including the right to all
dividends paid, declared or made with respect thereof. No Company Shares have
been authorized or issued, and the Company has not become obligated to authorize
or issue (including by reclassification or otherwise), any other equity security
(including without limitation any Preferred Company Shares or other preferred
security) having any preference or priority over, or ranking senior to, the
Investor Shares with respect to any rights set forth in this Agreement,
including but not limited to rights to dividends or other distributions and
rights upon liquidation, dissolution or winding-up.

13.4 As of the Execution Date, the paid in capital of the Company is in the
amount of four hundred twenty four million three hundred thousand Korean Won
(423,300,000), the Company has issued and outstanding a total of eight hundred
forty eight thousand six hundred (848,600) Common Company Shares with a par
value of Five Hundred Korean Won (KRW 500) per share, and the Company has no
Preferred Company Shares issued and outstanding.

13.5 There is no order, injunction or decree outstanding and there is no
litigation, proceeding or governmental investigation pending or, to the best of
the Company's knowledge, threatened against or relating to the Company, its
property, businesses or assets which has, or if determined against the Company
could have, a material adverse effect on the Company, the Company Shares, this
Agreement, or the Investors' title and right to the Investor Shares.

                           ARTICLE 14. CONFIDENTIALITY

Each Party and such Parties' respective employees, directors, consultants,
affiliates and subsidiaries shall ensure that any and all proprietary
information, trade secrets and all other confidential information regarding the
business, assets, customers, processes, and methods of any other Party that it
may learn in the course of negotiations for, or carrying out of, this Agreement
is treated by it in strict confidence and shall not use for any purpose other
than for this Agreement or the Venture or disclose such information, unless such
information (i) is required to be disclosed by Law or judicial order, (ii) is
required to be disclosed to give effect to this Agreement, (iii) is in good
faith independently acquired or developed, or (iv) becomes publicly known or
available other than through the fault of the Party seeking to use or disclose
such information.

                           ARTICLE 15. NON-COMPETITION

15.1 The Company shall not, and the Company shall cause any Person controlled by
it not to, for a period of five (5) years from and after the Execution Date,
directly or indirectly engage in the development, marketing, manufacture, sale,
distribution offering, or promoting for sale of any gallium arsenide

<PAGE>

semiconductor components or gallium arsenide-based subsystems or ceramic
components and ceramic based subsystems used in the transmission of voice, video
and data over wireless communication networks.

15.2 An Investor shall not, and the Investor shall cause any Person controlled
by it not to, for a period of five (5) years from and after the Execution Date,
directly or indirectly engage in the development of any mobile telecommunication
handsets.

15.3 The Company has not, and for the term of this Agreement will not, offer,
issue, sell, transfer or grant any Company Shares to any Person engaged in
substantially the same business as Investors and, further, the Company will
obtain such enforceable agreements from Shareholders necessary or advisable to
ensure that no Shareholder transfers or sells any Company Shares to such a
Person.

15.4 The Investors have not, and for the term of this Agreement will not, offer,
issue, sell, transfer or grant any Company Shares to any Person engaged in
substantially the same business as the Company and, further, the Investors will
obtain such enforceable agreements from Shareholders necessary or advisable to
ensure that no Shareholder transfers or sells any Company Shares to such a
Person.

15.5 The Company acknowledges that the remedy at law for any breach or
threatened breach of the agreements contained in this Article 15 will be
inadequate and agrees that in the event of such breach or threatened breach, in
addition to all other remedies available, an Investor will be entitled to obtain
preliminary or permanent injunctive relief without being required to prove
damages or post bond and, to the extent permitted by applicable Law, obtain a
temporary restraining order (or similar ex parte procedural device) upon the
commencement of such action.

                                ARTICLE 16. TERM

This Agreement shall continue in effect so long as any Investor holds any
Company Shares unless earlier terminated pursuant to Article 17 below.

                             ARTICLE 17. TERMINATION

This Agreement may be terminated upon mutual written consent of the Parties or
immediately upon notice in writing of the occurrence of one or more of the
following events:

17.1 by an Investor, if in good faith and exercising reasonable judgment the
board of directors of an Investor determines that (i) the responsibilities,
policies and objectives of this Agreement, as well as any related agreements,
have not been undertaken by the Company in form and substance reasonably
acceptable to the Investor within ten (10) Business Days of the Execution Date,
(ii) at any time the Company is no longer engaged in the Business, or (iii)
within thirty (30) days of the Execution Date the Company has failed to obtain
the Governmental Approvals required of the Venture, including but not limited to
certification as a Foreign Capital Invested Company by the Bank of Korea;

17.2 by either Party, if the other Party has breached any of its obligations
under this Agreement, and if either Party not in breach hereof has provided
notification, in writing, to the breaching Party of its obligation to remedy
such breach, and the breaching Party fails to remedy such breach to the
reasonable satisfaction of either Party within [thirty (30)] Business Days from
the date it received such written notice;

17.3 by either Party, if the other Party shall be or becomes incapable for a
period of sixty (60) Business Days of performing any of its obligations under
this Agreement subject to the terms of Article 21;

<PAGE>

17.4 by an either Party, if (i) the other Party enters into dissolution,
liquidation, bankruptcy, reorganization or compulsory composition; (ii)
creditors of the other Party file for the other Party's dissolution,
liquidation, bankruptcy, reorganization or compulsory composition; (iii)
creditors of the other Party have taken over the Company's management; (iv)
relevant financial institutions have suspended the other Party's clearing house
privileges; or (v) any material or significant part of the other Party's
undertaking, property or assets is expropriated or confiscated by action of any
government;

17.5 by an Investor, if Jay (Jongweon) Hong is no longer an employee of the
Company for any reason within three (3) years after the Execution Date.

                     ARTICLE 18. CONSEQUENCES OF TERMINATION

18.1 Termination of this Agreement shall be without prejudice to the accrued
rights and liabilities of the Parties at the date of termination, unless waived
in writing by the mutual agreement of the Parties.

18.2 Termination of this Agreement shall be accompanied by a notice of intent to
terminate this Agreement, in writing with stated reasons, provided to the other
Party hereto.

18.3 If this Agreement is terminated for any of the reasons set forth in Article
17, the Party providing notice of termination (the "Terminating Party") shall,
at its option, have the following rights, in addition to any other rights to
which it is entitled:

        18.3.1 If an Investor is the Terminating Party, to require the Company
        to purchase, pro rata in accordance with its ratio of shareholdings in
        the Company, all of Investor's Company Shares at fair market value;

        18.3.2 If the Company is the Terminating Party, to require the breaching
        Investor to sell all of the breaching Investor's Company shares at fair
        market price to the Company or a person to be designated by the Company

        18.3.3 An Investor may cause the Company to remove investor's name or
        names and/or its trademarks or other distinctive designations from the
        name of and from use by the Company. If a Party opts to request removal
        pursuant to this Section 18.3.3, the other Parties shall take all steps
        necessary to remove the name, trademark or trade name of or any
        reference to the party so opting, including the Korean language or Korea
        equivalent of such, as appropriate.

18.4 Upon termination of this Agreement for any reason, any and all information
(whether confidential or not), data or documentation in any form whatsoever
provided to the Company by an Investor regarding any of Investor's technical
know-how, patents or other intellectual property rights, and any and all
reproductions or copies thereof, shall be immediately returned to the Investor.

18.5 Upon termination of this Agreement for any reason, any and all information
(whether confidential or not), data or documentation in any form whatsoever
provided to the Investor by Company regarding any of Company's technical
know-how, patents or other intellectual property rights, and any and all
reproductions or copies thereof, shall be immediately returned to the Company.

18.6 In the event the Parties are unable to agree within a period of thirty (30)
Business Days upon the fair market value of any Company Shares to be
transferred, the fair market value shall be determined by an independent public
accountant to be chosen mutually by the Parties. The determination by such
accountant shall be final, conclusive, and binding on both Parties.

<PAGE>

18.7 Upon termination of this Agreement for any reason other than those set
forth in Article 16 above, the Parties shall have an immediate amicable
discussion with regard to the disposition of Company Shares owned by each
Investor and/or the disposition of the assets and liabilities (including any
severance obligations) of the Company. If the Parties fail to reach an agreement
regarding disposition, the dispute shall be settled in accordance with Article
23 below.

18.8 In the event of termination by any Party in accordance with any provision
of this Agreement, no Party shall be liable to the other, because of such
termination, for compensation, reimbursement, or damages on account of the loss
of prospective profits or anticipated sales or on account of expenditures,
investments, or commitments in connection with the business or goodwill of the
Parties. Termination shall not, however, relieve either Party of obligations
incurred prior to the termination or obligations under subcontracts, invoices,
supply agreements, original equipment manufacturing agreements or other similar
arrangements entered into separately by and between the Company and either
Investor (including such agreements entered into pursuant to Section 4.7 above).

                           ARTICLE 19. INDEMNIFICATION

Each Party agrees to indemnify, defend and hold the other Parties harmless
against any and all liabilities, losses, costs, damages, and/or expenses, which
either of them may sustain arising out of or related to a breach by such Party
of any provision of this Agreement. The Party wishing to assert its rights (the
"Indemnitee Party") set forth in this Article 19 shall notify the other Party or
Parties, as the case may be (the "Indemnitor Party") of any legal claim or legal
proceeding with respect to which such Party is asserting such right. Upon the
written request of the Indemnitee Party, the Indemnitor Party will assume the
defense of any claim, demand or action against such Indemnitee Party, and upon
request by the Indemnitee Party, will allow the Indemnitee Party to participate
in and control fully the defense thereof. Such participation will be at the
expense of the Indemnitee Party. Settlement by the Indemnitee Party, without the
Indemnitor Party's prior written consent shall release the Indemnitor Party from
the indemnity as to the claim, demand or action so settled.

                     ARTICLE 20. NON WAIVER, OTHER REMEDIES

20.1 Failure of a Party to insist upon the strict and punctual performance of
any provision hereof shall not constitute waiver of or estoppel against
asserting the right to require such performance, nor should a waiver or estoppel
in one case constitute a waiver or estoppel with respect to a later breach
whether of similar nature or otherwise.

20.2 Nothing in this Agreement shall prevent a Party from enforcing its rights
by such remedies as may be available in lieu of termination.

                            ARTICLE 21. FORCE MAJEURE

21.1 The failure or delay of a Party hereto to perform any obligation under this
Agreement solely by reason of acts of God, acts of government (except as
otherwise enumerated herein), riots, wars, strikes, lockouts, accidents in
transportation or other causes beyond its control shall not be deemed to be a
breach of this Agreement; provided, however, that the Party so prevented from
complying herewith shall continue to take all actions within its power to comply
as fully as possible herewith.

21.2 Except where the nature of the event shall prevent it from doing so, the
Party suffering such force majeure shall notify the other Party in writing
within five (5) Business Days after the occurrence of such force

<PAGE>

majeure and shall in every instance, to the extent it is capable of doing so,
use its best efforts to remove or remedy such cause with all reasonable
dispatch.

                        ARTICLE 22. DISCLAIMER OF AGENCY

22.1 Nothing in this Agreement shall constitute or be deemed to constitute the
relationship of principal, representative or agent as between the Parties.

22.2 Nothing in this Agreement or in any document referred to in it shall
constitute a partnership between the Parties, nor shall the execution,
completion and implementation of this Agreement confer on any Party (i) the
power to bind or impose any obligations on the other Party in regards to any
third Persons, or (ii) the power, ability, or right to pledge the credit of the
other Party.

                         ARTICLE 23. DISPUTE RESOLUTION

23.1 All dispute, controversies, or differences which may arise between the
Parties out of or in relation to or in connection with this Agreement, or for
the breach hereof, shall be finally settled by arbitration before three (3)
arbitrators under the Rules of Arbitration of the International Chamber of
Commerce in Korea. Each Party shall be entitled to nominate one arbitrator. If
dispute, controversies, or differences arise between two of the Parties hereto,
each Party shall be entitled to nominate one arbitrator and the arbitrators so
selected by the Parties shall mutually agree upon the selection of the third
arbitrator. The arbitration proceeding shall be conducted in English. The
results of such arbitration shall be conclusive and binding upon the parties,
and shall be enforceable in any court having jurisdiction over the party against
whom the award was rendered.

23.2 Each Party hereto agrees to pay and discharge all reasonable costs,
attorney fees and expenses that are incurred by another Party in enforcing the
terms of this Agreement, provided that such other Party shall prevail in such
proceedings.

23.3 The validity, performance, construction, and effect of this Agreement shall
be interpreted in accordance with and governed by the substantive Laws of the
Republic of Korea, without regard to conflicts of laws provisions.

                            ARTICLE 24. MISCELLANEOUS

24.1 Assignability. This Agreement and each and every covenant, term and
condition hereof shall be binding upon and effective to the benefit of the
Parties hereto and their respective successors and assignees, but neither this
Agreement nor any rights or obligations hereunder shall be assignable directly
or indirectly by any Party hereto without the prior written consent of the other
Party; provided, however, that an Investor may transfer its Company Shares
without such consent of the Company in accordance with Section 5.5 above. Any
Person who becomes a holder of Investor Shares pursuant to this Agreement shall,
as a condition precedent to receiving such shares and exercising rights as a
shareholder of the Company, execute and become a Party to this Agreement and
shall be bound by all of its terms and conditions.

24.2 Expenses. Each Party shall bear its own attorney fees and other expenses
incurred in the preparation and execution of this Agreement, and any other
related agreement provided hereunder, and the performance of the Parties'
respective obligations hereunder, and the Parties shall hold each other harmless
for any such charges.

<PAGE>

24.3 Modification. No amendment, change, addition or modification of the terms
set forth in this Agreement shall be effective or binding upon either of the
Parties unless reduced to writing and executed by the respective duly authorized
representatives of each Party.

24.4 Severability. In the event any term or provision of this Agreement shall
for any reason be invalid, illegal or unenforceable in any respect, such
invalidity, illegality or unenforceability shall not affect any other term or
provision of this Agreement and this Agreement shall be interpreted and
construed as if such term or provision, to the extent unenforceable, had never
been contained in this Agreement.

24.5 Notice.

        24.5.1 Any notice required or permitted to be given hereunder shall be
        in writing and may be given by personal service, registered airmail, or
        by facsimile if confirmed on the same day in writing by registered
        airmail, with postage fully prepaid to the following addresses:

        If to Celeritek:

                3236 Scott Blvd.,
                Santa Clara, California

        If to UBE:

                2023-2 Aza-Mugigawa Okubun, Ohmine-cho, Mine city
                Yamaguchi Pref., 759-2214, Japan

        If to the Company:

                NewGen Telecom Corporation
                124-4 #406, Ojeon-Dong, Uiwnag-City
                Kyungki-Do, Korea

        24.5.2 Except as otherwise specified herein, all notices, demands, and
        other communications shall be deemed to have been duly given on the date
        of receipt if delivered personally or by facsimile or fifteen (15)
        Business Days after the date of mailing if sent by registered airmail.

        24.5.3 All notices, demands or other communications hereunder and any
        other documents required to be delivered hereunder shall be in the
        English language or accompanied by a certified translation thereof into
        the English language.

24.6 Counterparts. This Agreement is written in the English language and may be
executed in multiple counterparts, each of which shall be deemed an original but
all of which together shall constitute one document.

24.7 Language. The English language text of this Agreement shall prevail over
any translation thereof for purposes of interpretation and resolving
ambiguities.

<PAGE>

24.8 Entire Agreement. This Agreement supersedes all previous representations,
understandings, or agreements, oral or written, between the Parties with respect
to the subject matter hereof, and the agreements and documents contemplated
hereby contains the entire understanding of the Parties as to the terms and
conditions of their relationship.

24.9 Headings. The headings contained in this Agreement are for the convenience
of the reader only and shall not in any way affect the meaning or interpretation
of this Agreement.

IN WITNESS WHEREOF, the authorized representatives of the Parties hereto have
caused this Agreement to be executed as of the date first above written.

        CELERITEK, INC.

        By
          ---------------------------
        Name:  Tamer Husseini
        Title: Chief Executive Officer and President

        UBE

        By
          ---------------------------
        Name:  Takaaki Tanaka
        Title:  General Manager

        NEWGEN CO., LTD.

        By
          ---------------------------
        Name:    Jay Hong
        Title:   Chief Executive Officer<PAGE>
                                                                     Exhibit 4.3

                              CONNETICS CORPORATION

                        1995 DIRECTORS' STOCK OPTION PLAN

      1.    Purposes of the Plan. The purposes of this Directors' Stock Option
Plan are to attract and retain the best available personnel for service as
Directors of the Company, to provide additional incentive to the Outside
Directors of the Company to serve as Directors, and to encourage their continued
service on the Board. All options granted hereunder shall be "nonstatutory stock
options".

      2.    Definitions. As used herein, the following definitions shall apply:

            (a)   "Board" shall mean the Board of Directors of the Company.

            (b)   "Code" shall mean the Internal Revenue Code of 1986, as
amended.

            (c)   "Common Stock" shall mean the Common Stock of the Company.

            (d)   "Company" shall mean Connetics Corporation, a Delaware
corporation.

            (e)   "Continuous Status as a Director" shall mean the absence of
any interruption or termination of service as a Director.

            (f)   "Director" shall mean a member of the Board.

            (g)   "Employee" shall mean any person, including officers and
directors, employed by the Company or any Parent or Subsidiary of the Company.
The payment of a director's fee by the Company shall not be sufficient in and of
itself to constitute "employment" by the Company.

            (h)   "Exchange Act" shall mean the Securities Exchange Act of 1934,
as amended.

            (i)   "Option" shall mean a stock option granted pursuant to the
Plan. All options shall be nonstatutory stock options (i.e., options that are
not intended to qualify as incentive stock options under Section 422 of the
Code).

            (j)   "Optioned Stock" shall mean the Common Stock subject to an
Option.

            (k)   "Optionee" shall mean an Outside Director who receives an
Option.

            (l)   "Outside Director" shall mean a Director who is not an
Employee.

            (m)   "Parent" shall mean a "parent corporation", whether now or
hereafter existing, as defined in Section 424(e) of the Code.

            (n)   "Plan" shall mean this 1995 Directors' Stock Option Plan.

<PAGE>
            (o)   "Share" shall mean a share of the Common Stock, as adjusted in
accordance with SECTION 11 of the Plan.

            (p)   "Subsidiary" shall mean a "subsidiary corporation", whether
now or hereafter existing, as defined in Section 424(f) of the Code.

      3.    Stock Subject to the Plan. Subject to the provisions of SECTION 11
of the Plan, the maximum aggregate number of Shares which may be optioned and
sold under the Plan is 600,000 Shares (the "Pool") of Common Stock. The Shares
may be authorized, but unissued, or reacquired Common Stock. If an Option should
expire or become unexercisable for any reason without having been exercised in
full, the unpurchased Shares which were subject thereto shall, unless the Plan
shall have been terminated, become available for future grant under the Plan. If
Shares which were acquired upon exercise of an Option are subsequently
repurchased by the Company, such Shares shall not in any event be returned to
the Plan and shall not become available for future grant under the Plan.

      4.    Administration of and Grants of Options under the Plan.

            (a)   Administrator. Except as otherwise required herein, the Plan
shall be administered by the Board.

            (b)   Procedure for Grants. All grants of Options hereunder shall be
automatic and nondiscretionary and shall be made strictly in accordance with the
following provisions:

                  (i)   No person shall have any discretion to select which
      Outside Directors shall be granted Options or to determine the number of
      Shares to be covered by Options granted to Outside Directors.

                  (ii)  Each Outside Director who first becomes an Outside
      Director after the effective date of this Plan shall be automatically
      granted an Option (the "First Option") to purchase 30,000 Shares on the
      date on which such person first becomes an Outside Director, whether
      through election by the shareholders of the Company or appointment by the
      Board of Directors to fill a vacancy.

                  (iii) Each Outside Director (including Outside Directors who
      were not eligible for a First Option) shall thereafter be automatically
      granted an Option to purchase 15,000 Shares (a "Subsequent Option") on the
      date of each Annual Meeting of the Company's shareholders at which such
      Outside Director is elected, provided that, on such date, he or she shall
      have served on the Board for at least six (6) months prior to the date of
      such Annual Meeting.

                  (iv)  Notwithstanding the provisions of SUBSECTIONS (ii) and
      (iii) hereof, in the event that a grant would cause the number of Shares
      subject to outstanding Options plus the number of Shares previously
      purchased upon exercise of Options to exceed the Pool, then each such
      automatic grant shall be for that number of Shares determined by dividing
      the total number of Shares remaining available for grant by the number of
      Outside Directors receiving an Option on such date on the automatic grant
      date. Any further grants shall then be deferred until such time, if any,
      as additional Shares become available for grant

                                      -2-
<PAGE>
      under the Plan through action of the shareholders to increase the number
      of Shares which may be issued under the Plan or through cancellation or
      expiration of Options previously granted hereunder.

                  (v)   Notwithstanding the provisions of SUBSECTIONS (ii) and
      (iii) hereof, any grant of an Option made before the Company has obtained
      shareholder approval of the Plan in accordance with SECTION 17 hereof
      shall be conditioned upon obtaining such shareholder approval of the Plan
      in accordance with SECTION 17 hereof.

                  (vi)  The terms of each First Option granted hereunder shall
      be as follows:

                        (A)   the First Option shall be exercisable only while
            the Outside Director remains a Director of the Company, except as
            set forth in SECTION 9 hereof.

                        (B)   the exercise price per Share shall be 100% of the
            fair market value per Share on the date of grant of the First
            Option, determined in accordance with SECTION 8 hereof.

                        (C)   the First Option shall become exercisable in
            installments cumulatively as to 25% of the Shares subject to the
            First Option on each of the first, second, third and fourth
            anniversaries of the date of grant of the Option.

                  (vii) The terms of each Subsequent Option granted hereunder
      shall be as follows:

                        (A)   the Subsequent Option shall be exercisable only
            while the Outside Director remains a Director of the Company, except
            as set forth in SECTION 9 hereof.

                        (B)   the exercise price per Share shall be 100% of the
            fair market value per Share on the date of grant of the Subsequent
            Option, determined in accordance with SECTION 8 hereof.

                        (C)   the Subsequent Option shall become exercisable as
            to one hundred percent (100%) of the Shares subject to the
            Subsequent Option on the first anniversary of the date of grant of
            the Subsequent Option.

            (c)   Powers of the Board. Subject to the provisions and
restrictions of the Plan, the Board shall have the authority, in its discretion:

                  (i)   to determine, upon review of relevant information and in
      accordance with SECTION 8(b) of the Plan, the fair market value of the
      Common Stock;

                                      -3-
<PAGE>
                  (ii)  to determine the exercise price per share of Options to
      be granted, which exercise price shall be determined in accordance with
      SECTION 8(a) of the Plan;

                  (iii) to interpret the Plan;

                  (iv)  to prescribe, amend and rescind rules and regulations
      relating to the Plan;

                  (v)   to authorize any person to execute on behalf of the
      Company any instrument required to effectuate the grant of an Option
      previously granted hereunder; and

                  (vi)  to make all other determinations deemed necessary or
      advisable for the administration of the Plan.

            (d)   Effect of Board's Decision. All decisions, determinations and
interpretations of the Board shall be final and binding on all Optionees and any
other holders of any Options granted under the Plan.

            (e)   Suspension or Termination of Option. If the President or his
or her designee reasonably believes that an Optionee has committed an act of
misconduct, the President may suspend the Optionee's right to exercise any
option pending a determination by the Board of Directors (excluding the Outside
Director accused of such misconduct). If the Board of Directors (excluding the
Outside Director accused of such misconduct) determines an Optionee has
committed an act of embezzlement, fraud, dishonesty, nonpayment of an obligation
owed to the Company, breach of fiduciary duty or deliberate disregard of the
Company rules resulting in loss, damage or injury to the Company, or if an
Optionee makes an unauthorized disclosure of any Company trade secret or
confidential information, engages in any conduct constituting unfair
competition, induces any Company customer to breach a contract with the Company
or induces any principal for whom the Company acts as agent to terminate such
agency relationship, neither the Optionee nor his or her estate shall be
entitled to exercise any option whatsoever. In making such determination, the
Board of Directors (excluding the Outside Director accused of such misconduct)
shall act fairly and shall give the Optionee an opportunity to appear and
present evidence on Optionee's behalf at a hearing before the Board or a
committee of the Board.

      5.    Eligibility. Options may be granted only to Outside Directors. All
Options shall be automatically granted in accordance with the terms set forth in
SECTION 4(b) hereof. An Outside Director who has been granted an Option may, if
he or she is otherwise eligible, be granted an additional Option or Options in
accordance with such provisions. The Plan shall not confer upon any Optionee any
right with respect to continuation of service as a Director or nomination to
serve as a Director, nor shall it interfere in any way with any rights which the
Director or the Company may have to terminate his or her directorship at any
time.

      6.    Term of Plan; Effective Date. The Plan shall become effective on the
earlier to occur of its adoption by the Board of Directors or its approval by
the shareholders of the Company. It shall continue in effect for a term of ten
(10) years unless sooner terminated under SECTION 13 of the Plan.

                                      -4-
<PAGE>
      7.    Term of Options. The term of each Option shall be ten (10) years
from the date of grant thereof.

      8.    Exercise Price and Consideration.

            (a)   Exercise Price. The per Share exercise price for the Shares to
be issued pursuant to exercise of an Option shall be 100% of the fair market
value per Share on the date of grant of the Option.

            (b)   Fair Market Value. The fair market value shall be determined
by the Board; provided, however, that where there is a public market for the
Common Stock, the fair market value per Share shall be the mean of the bid and
asked prices of the Common Stock in the over-the-counter market on the date of
grant, as reported in The Wall Street Journal (or, if not so reported, as
otherwise reported by the National Association of Securities Dealers Automated
Quotation ("Nasdaq") System) or, in the event the Common Stock is traded on the
Nasdaq National Market or listed on a stock exchange, the fair market value per
Share shall be the closing price on such system or exchange on the date of grant
of the Option, as reported in The Wall Street Journal. With respect to any
Options granted hereunder concurrently with the initial effectiveness of the
Plan, the fair market value shall be the Price to Public as set forth in the
final prospectus relating to such initial public offering.

            (c)   Form of Consideration. The consideration to be paid for the
Shares to be issued upon exercise of an Option shall consist entirely of cash,
check, other Shares of Common Stock having a fair market value on the date of
surrender equal to the aggregate exercise price of the Shares as to which said
Option shall be exercised (which, if acquired from the Company, shall have been
held for at least six months), or any combination of such methods of payment
and/or any other consideration or method of payment as shall be permitted under
applicable corporate law.

      9.    Exercise of Option.

            (a)   Procedure for Exercise; Rights as a Shareholder.

                  (i)   Any Option granted hereunder shall be exercisable at
      such times as are set forth in SECTION 4(b) hereof; provided, however,
      that no Options shall be exercisable prior to shareholder approval of the
      Plan in accordance with SECTION 17 hereof has been obtained.

                  (ii)  An Option may not be exercised for a fraction of a
      Share.

                  (iii) An Option shall be deemed to be exercised when written
      notice of such exercise has been given to the Company in accordance with
      the terms of the Option by the person entitled to exercise the Option and
      full payment for the Shares with respect to which the Option is exercised
      has been received by the Company. Full payment may consist of any
      consideration and method of payment allowable under SECTION 8(c) of the
      Plan. Until the issuance (as evidenced by the appropriate entry on the
      books of the Company or of a duly authorized transfer agent of the
      Company) of the stock certificate evidencing such Shares, no right to vote
      or receive dividends or any other rights as a shareholder shall exist with

                                      -5-
<PAGE>
      respect to the Optioned Stock, notwithstanding the exercise of the Option.
      A share certificate for the number of Shares so acquired shall be issued
      to the Optionee as soon as practicable after exercise of the Option. No
      adjustment will be made for a dividend or other right for which the record
      date is prior to the date the stock certificate is issued, except as
      provided in SECTION 11 of the Plan.

                  (iv)  Exercise of an Option in any manner shall result in a
      decrease in the number of Shares which thereafter may be available, both
      for purposes of the Plan and for sale under the Option, by the number of
      Shares as to which the Option is exercised.

            (b)   Termination of Status as a Director. If an Outside Director
ceases to serve as a Director, he or she may, but only within ninety (90) days
after the date he or she ceases to be a Director of the Company, exercise his or
her Option to the extent that he or she was entitled to exercise it at the date
of such termination. Notwithstanding the foregoing, in no event may the Option
be exercised after its term set forth in SECTION 7 has expired. To the extent
that such Outside Director was not entitled to exercise an Option at the date of
such termination, or does not exercise such Option (which he or she was entitled
to exercise) within the time specified herein, the Option shall terminate.

            (c)   Disability of Optionee. Notwithstanding SECTION 9(b) above, in
the event a Director is unable to continue his or her service as a Director with
the Company as a result of his or her total and permanent disability (as defined
in Section 22(e)(3) of the Internal Revenue Code), he or she may, but only
within six (6) months (or such other period of time not exceeding twelve (12)
months as is determined by the Board) from the date of such termination,
exercise his or her Option to the extent he or she was entitled to exercise it
at the date of such termination. Notwithstanding the foregoing, in no event may
the Option be exercised after its term set forth in SECTION 7 has expired. To
the extent that he or she was not entitled to exercise the Option at the date of
termination, or if he or she does not exercise such Option (which he or she was
entitled to exercise) within the time specified herein, the Option shall
terminate.

            (d)   Death of Optionee. In the event of the death of an Optionee:

                  (i)   During the term of the Option who is, at the time of his
      or her death, a Director of the Company and who shall have been in
      Continuous Status as a Director since the date of grant of the Option, the
      Option may be exercised, at any time within six (6) months following the
      date of death, by the Optionee's estate or by a person who acquired the
      right to exercise the Option by bequest or inheritance, but only to the
      extent of the right to exercise that would have accrued had the Optionee
      continued living and remained in Continuous Status as Director for six (6)
      months (or such lesser period of time as is determined by the Board) after
      the date of death. Notwithstanding the foregoing, in no event may the
      Option be exercised after its term set forth in SECTION 7 has expired.

                  (ii)  Within three (3) months after the termination of
      Continuous Status as a Director, the Option may be exercised, at any time
      within six (6) months following the date of death, by the Optionee's
      estate or by a person who acquired the right to exercise the Option by
      bequest or

                                      -6-
<PAGE>
      inheritance, but only to the extent of the right to exercise that had
      accrued at the date of termination. Notwithstanding the foregoing, in no
      event may the option be exercised after its term set forth in SECTION 7
      has expired.

      10.   Nontransferability of Options. The Option may not be sold, pledged,
assigned, hypothecated, transferred, or disposed of in any manner other than by
will or by the laws of descent or distribution or pursuant to a qualified
domestic relations order (as defined by the Code or the rules thereunder). The
designation of a beneficiary by an Optionee does not constitute a transfer. An
Option may be exercised during the lifetime of an Optionee only by the Optionee
or a transferee permitted by this Section.

      11.   Adjustments Upon Changes in Capitalization; Corporate Transactions.

            (a)   Adjustment. Subject to any required action by the shareholders
of the Company, the number of shares of Common Stock covered by each outstanding
Option, and the number of shares of Common Stock which have been authorized for
issuance under the Plan but as to which no Options have yet been granted or
which have been returned to the Plan upon cancellation or expiration of an
Option, as well as the price per share of Common Stock covered by each such
outstanding Option, shall be proportionately adjusted for any increase or
decrease in the number of issued shares of Common Stock resulting from a stock
split, reverse stock split, stock dividend, combination or reclassification of
the Common Stock, or any other increase or decrease in the number of issued
shares of Common Stock effected without receipt of consideration by the Company;
provided, however, that conversion of any convertible securities of the Company
shall not be deemed to have been "effected without receipt of consideration."
Such adjustment shall be made by the Board, whose determination in that respect
shall be final, binding and conclusive. Except as expressly provided herein, no
issuance by the Company of shares of stock of any class, or securities
convertible into shares of stock of any class, shall affect, and no adjustment
by reason thereof shall be made with respect to, the number or price of shares
of Common Stock subject to an Option.

            (b)   Corporate Transactions. In the event of (i) a dissolution or
liquidation of the Company, (ii) a sale of all or substantially all of the
Company's assets, (iii) a merger or consolidation in which the Company is not
the surviving corporation, or (iv) any other capital reorganization in which
more than fifty percent (50%) of the shares of the Company entitled to vote are
exchanged, the Company shall give to the Eligible Director, at the time of
adoption of the plan for liquidation, dissolution, sale, merger, consolidation
or reorganization, either a reasonable time thereafter within which to exercise
the Option, including Shares as to which the Option would not be otherwise
exercisable, prior to the effectiveness of such liquidation, dissolution, sale,
merger, consolidation or reorganization, at the end of which time the Option
shall terminate, or the right to exercise the Option, including Shares as to
which the Option would not be otherwise exercisable (or receive a substitute
option with comparable terms), as to an equivalent number of shares of stock of
the corporation succeeding the Company or acquiring its business by reason of
such liquidation, dissolution, sale, merger, consolidation or reorganization.

                                      -7-
<PAGE>
      12.   Time of Granting Options. The date of grant of an Option shall, for
all purposes, be the date determined in accordance with SECTION 4(B) hereof.
Notice of the determination shall be given to each Outside Director to whom an
Option is so granted within a reasonable time after the date of such grant.

      13.   Amendment and Termination of the Plan.

            (a)   Amendment and Termination. The Board may amend or terminate
the Plan from time to time in such respects as the Board may deem advisable;
provided that, to the extent necessary and desirable to comply with Rule 16b-3
under the Exchange Act (or any other applicable law or regulation), the Company
shall obtain approval of the shareholders of the Company to Plan amendments to
the extent and in the manner required by such law or regulation. Notwithstanding
the foregoing, the provisions set forth in SECTION 4 of this Plan (and any other
Sections of this Plan that affect the formula award terms required to be
specified in this Plan by Rule 16b-3) shall not be amended more than once every
six months, other than to comport with changes in the Code, the Employee
Retirement Income Security Act of 1974, as amended, or the rules thereunder.

            (b)   Effect of Amendment or Termination. Any such amendment or
termination of the Plan that would impair the rights of any Optionee shall not
affect Options already granted to such Optionee and such Options shall remain in
full force and effect as if this Plan had not been amended or terminated, unless
mutually agreed otherwise between the Optionee and the Board, which agreement
must be in writing and signed by the Optionee and the Company.

      14.   Conditions Upon Issuance of Shares. Shares shall not be issued
pursuant to the exercise of an Option unless the exercise of such Option and the
issuance and delivery of such Shares pursuant thereto shall comply with all
relevant provisions of law, including, without limitation, the Securities Act of
1933, as amended, the Exchange Act, the rules and regulations promulgated
thereunder, state securities laws, and the requirements of any stock exchange
upon which the Shares may then be listed, and shall be further subject to the
approval of counsel for the Company with respect to such compliance. As a
condition to the exercise of an Option, the Company may require the person
exercising such Option to represent and warrant at the time of any such exercise
that the Shares are being purchased only for investment and without any present
intention to sell or distribute such Shares, if, in the opinion of counsel for
the Company, such a representation is required by any of the aforementioned
relevant provisions of law.

      15.   Reservation of Shares. The Company, during the term of this Plan,
will at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan. Inability of the Company to
obtain authority from any regulatory body having jurisdiction, which authority
is deemed by the Company's counsel to be necessary to the lawful issuance and
sale of any Shares hereunder, shall relieve the Company of any liability in
respect of the failure to issue or sell such Shares as to which such requisite
authority shall not have been obtained.

      16.   Option Agreement. Options shall be evidenced by written option
agreements in such form as the Board shall approve.

      17.   Shareholder Approval. Continuance of the Plan shall be subject to
approval by the shareholders of the Company at or prior to the first annual
meeting of shareholders held

                                      -8-
<PAGE>
subsequent to the granting of an Option hereunder. If such shareholder approval
is obtained at a duly held shareholders' meeting, it may be obtained by the
affirmative vote of the holders of a majority of the outstanding shares of the
Company present or represented and entitled to vote thereon. If such shareholder
approval is obtained by written consent, it may be obtained by the written
consent of the holders of a majority of the outstanding shares of the Company.
Options may be granted, but not exercised, before such shareholder approval.

                                    * * * * *

                                      -9-

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