Document:

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                                                                    Exhibit 10.9

                         AGREEMENT ON TRANSFER OF PATENT
                              (SUMMARY TRANSLATION)

TRANSFEROR:
Kunjie Zhuang
Address: Room A4-402, Longteng Garden, Huli District, Xiamen, Fujian Province

TRANSFEREE:
Shenzhen GrenTech Co., Ltd.
Legal Representative: Yingjie Gao
Address: Room 1001, 10th Floor, East Tower, Block 4, Saige Science & Technology
         Park, Huaqiang Road North, Futian District, Shenzhen

Whereas the Transferor has lawful ownership to Multilocular Filter with Low
Loss, High Selectivity and High Power, with Patent Number: ZL200320110871.6 (the
"PATENT") and agrees to transfer the Patent to the Transferee free of charge.

Whereas the Transferee is willing to accept the transfer of the aforesaid Patent
by the Transferor and to implement the underlying technology under the Patent.

Both parties hereby enter into this agreement:

Section I      The Transferor hereby transfers the Patent to the Transferee free
               of charge.

Section II     The Transferor shall submit all necessary documentation required
               by the Patent Bureau of China for registering transfer of the
               Patent.

Section III    Within ten days after the signing of this Agreement, the
               Transferor shall deliver the complete set of documents relating
               to the Patent to the Transferee, including the application,
               notice of acceptance of application, notice of power of attorney,
               patent certificate and announcement. The Transferor shall also
               assist the Transferee in implementing the technology under the
               Patent.

Section IV     Upon the completion of the transfer hereunder, where a third
               party submits a claim to the Patent Bureau of China to challenge
               the validity of the Patent, both the Transferor and the
               Transferee shall jointly respond to the claim.

               Where a third party brings a proceeding against the Transferee
               for infringement of any patent rights due to the Patent
               subsequent to the completion of the transfer hereunder, both the
               Transferor and the Transferee shall jointly respond to the
               proceeding and bear the consequences of the dispute.

Section V      Upon the completion of the transfer of the Patent, the Transferee
               shall own the Patent. The Transferor shall not attempt to
               transfer or license the Patent to any third party.

Section VI     This Agreement shall come into effect upon due execution by both
               parties, and the transfer of Patent shall come into effect upon
               its registration with and announcement by the Patent Bureau of
               China.

Section VII    Any dispute arising from this Agreement shall be resolved through
               friendly negotiation between the parties. Where a dispute cannot
               be resolved through negotiation, either party is entitled to
               bring a lawsuit at any people's court with jurisdiction.

Section VIII   This Agreement is done in three counterparts, each having equal
               effect.

TRANSFEROR:                             TRANSFEREE

/s/ Kunjie Zhuang                       /Seal/ Shenzhen GrenTech Co., Ltd.
-------------------------------------

                                        /s/ Gao Yingjie
                                        ----------------------------------------

Date: April 11, 2005<PAGE>
                                                                   Exhibit 10.10

                             COLLABORATION AGREEMENT
                              (SUMMARY TRANSLATION)

PARTY A:       Shenzhen GrenTech Co., Ltd.

PARTY B:       Southeast University of China

SECTION I      PROJECT NAME

               Research and application of broadband wireless network technology
               (the "TECHNOLOGY").

SECTION II     REQUIREMENTS OF THE TECHNOLOGY

               Research relating to a series of broadband wireless network
               technologies including:

               (1)  Large volume digital microwave system;

               (2)  CPRI wireless equipment;

               (3)  RFID technical research and sample machine;

               (4)  Other research items entrusted by Party A during the term of
                    this Agreement.

SECTION III    FUNDING AND DISBURSEMENT

               Funding for this project shall be RMB 1.3 million in total, which
               shall be disbursed in two installments within two years as
               follows:

               (1)  RMB 0.65 million in 2005, with RMB 0.3 million disbursed
                    prior to March 30, 2005 and RMB 0.35 million prior to
                    December 31, 2005.

               (2)  RMB 0.65 million in 2006, with RMB 0.3 million prior to June
                    30, 2006 and RMB 0.35 million prior to December 31, 2006.

SECTION IV     PLAN, PROGRESS AND INSPECTION

               The term for research and development of the Technology hereunder
               is 24 months from January 1, 2005 to December 31, 2006, with the
               following timetable of progress:

               (a)  Complete large volume digital microwave system prior to
                    September 30, 2005;

               (b)  Complete CPRI wireless equipment prior to December 31, 2006;

               (c)  Complete RFID research and its sample machine prior to
                    December 31, 2005;

               (d)  Other related research and development to be arranged by
                    agreement of both parties under the circumstances.

               During the term for research and development of the Technology,
               authorized persons of Party A shall have unlimited access to the
               research and development sites from time to time.

SECTION V      TERM, PLACE AND METHOD OF PERFORMANCE

               The research and development of the Technology shall be conducted
               during the period from January 1, 2005 until December 31, 2006
               and within the Information Research Center in Southeast
               University of China and GrenTech Research and Development Center
               in Nanjing.

SECTION VI     CONFIDENTIALITY

               All technical documents and materials relating to the Technology
               and its research and development shall be jointly owned by the
               parties and neither party shall disclose any such documents,
               materials or information to any third party without the consent
               of the other party.

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SECTION VII    RISK ALLOCATION

               Party A shall bear the investment risk of its financial
               contribution to this project and Party B shall bear the
               investment risk of its human resources.

SECTION VIII   OWNERSHIP OF RESEARCH AND DEVELOPMENT RESULTS

               Party A shall have the right to use the Technology and shall be
               the owner of the patent relating to the Technology. Party B shall
               not attempt to transfer any such right or ownership to any third
               party. The research staff of both parties share the right of
               authorship of the patent, the right to publish articles under
               their names, the signature right for submission of the research
               results and the right to receive award.

SECTION IX     STANDARDS AND METHODS FOR INSPECTION

               Both parties shall inspect and confirm the research and
               development project in accordance with the technical requirements
               of the Technology.

SECTION X      COMPENSATION

               Included in the funding of the project as described herein.

SECTION XI     TECHNICAL COOPERATION AND SERVICES

               Party B shall provide relevant software and hardware training and
               guidance to Party A.

SECTION XII    DISPUTE RESOLUTION

               Both parties shall perform the obligations under this Agreement
               on the basis of friendly cooperation and mutual benefit.

               During the term of this Agreement, any amendment or modifocation
               to this Agreement shall be evidenced in a writing and shall come
               into effect after having been signed by the authorized persons of
               both parties and sealed properly.

<PAGE>

               Any disputes in connection with this Agreement shall be resolved
               through friendly negotiation. Any dispute that cannot be resolved
               through friendly negotiation may be submitted by either party to
               a people's court with proper jurisdiction for resolution.

SECTION XIII   MISCELLANEOUS

               As the performance of this Agreement requires a relatively long
               period of time and the market requirements may change during this
               period, Party A may raise reasonable amendments to the research
               and development plan currently contemplated hereunder and, after
               friendly negotiations between the parties, amend or supplement
               this Agreement.

PARTY A:       /seal/ Shenzhen GrenTech Co., Ltd.

               /s/ Huang Guanyu
               ---------------------------------

PARTY B:       /seal/ Southeast University of China

               /s/ Shen Datong                     /s/ Hu Aiqun
               ---------------------------         -----------------------------<PAGE>
                                                                   Exhibit 10.11

             COLLABORATION AGREEMENT RELATING TO A JOINT LABORATORY
                             (Summary Translation)
                                (April 18, 2002)

As proposed by Professor Wang Zhigong, director of the Institute of RF & OE-ICs
of Southeast University (the "INSTITUTE"), and Professor Zhuang Kunjie,
president of Quanzhou Lake Microwave Co., Ltd ("LAKE MICROWAVE"), after friendly
negotiation and discussion, both parties agree to establish a joint laboratory
as provided herein (the "JOINT LAB").

Both parties hereby agree as follows:

1.   Through the Joint Lab, the parties intend to cooperate and share resources
     with respect to chip design, functional module, technical development of
     integrated application system and other RF and optical electrical fields.

2.   The Joint Lab shall be located in the Institute for the time being. The
     staff of the Joint Lab can be appointed by and from both parties. The daily
     operations of the Joint Lab will be under the management of the Institute.

3.   The instruments and equipment in the Joint Lab will be loaned by each
     party, who shall maintain its ownership to such instruments and equipment
     it has loaned to the Joint Lab. The Joint Lab shall have the right to use
     these instruments and equipment.

4.   The operating expenses of the Joint Lab will be borne by both parties
     subject to evaluation and settlement annually.

5.   The plans on research and development and human resources of the Joint Lab
     will be determined by the parties after consultation. Management members of
     both parties shall meet at least twice a year. The meetings will primarily
     review the progress of the specific research and development projects and
     the daily operating expenses incurred.

6.   Both parties shall jointly own the patent in connection with any invention
     of the Joint Lab, jointly author any publication and jointly file any
     appraisal application report.

7.   Lake Microwave shall have priority in commercializing any result from
     research and development by the Joint Lab. The parties agree to separately
     discuss and agree on how to share the profits from sale of any products
     after such commercialization.

8.   The Institute shall set up an experiment base at the premises of Lake
     Microwave. The post-development processing and commercialization for any
     products under research and development at the Joint Lab shall be conducted
     at this base in Lake Microwave. Lake Microwave shall provide support
     necessary for that purpose.

9.   The term of this Agreement shall be five years and shall be subject to
     further negotiation upon its expiration.

10.  This Agreement may be amended or otherwise modified to deal with currently
     unforeseeable circumstances during the term of this Agreement.

SOUTHEAST UNIVERSITY INSTITUTE OF RF & OE-ICS

/s/ Wang Zhigong
-------------------------------------

/seal/ Southeast University Institute of RF & OE-ICs

QUANZHOU LAKE MICROWAVE CO., LTD.

/s/ Zhuang Kunjie
-------------------------------------

/seal/ Quanzhou Lake Microwave Co., Ltd.

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