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                                                                   EXHIBIT 10.11

                          Finglas Technologies Limited

                                                    McKee Avenue
                                                    Finglas
                                                    Dublin 11

                                                    Tel. 814 2000
                                                    Fax 864 0122

2nd July 1999

Centurion International Ltd
2a Alton Business Park
Gatehouse Way
Aylesbury
Buckinghamshire HP19 3XU
United Kingdom

Re: Patent License Agreement dated 5 July 1999

Dear Sirs,

We refer to the Patent License Agreement between us dated the 5 July 1999 and
confirm that the Patents referred to therein are licensed to you to the
exclusion of any other party for the duration of the said Patent License
Agreement. We further confirm that the Patents referred to in the said Patent
License Agreement shall not be utilised by Finglas Technologies Limited for the
manufacture of moulded antenna products for the term of the Patent License
Agreement without the prior written consent of Centurion International Ltd.

Signed: /s/ James A. Boyle
       ----------------------------
       for and on behalf of
       Finglas Technologies Limited<PAGE>   1
                                                                   Exhibit 10.12

                                OPTION AGREEMENT

THIS OPTION AGREEMENT is made the 5th day of July 1999 BETWEEN FINGLAS
TECHNOLOGIES LIMITED whose registered office is situated at McKee Avenue,
Finglas Dublin 11 (hereinafter "Finglas" which expression shall include its
successors, administrators and permitted assigns) a Company organised and
existing under the Laws of Ireland of the One Part AND CENTURION INTERNATIONAL,
INC. having its principal office at 3425 North 44th Street, Lincoln, NE 68504,
U.S.A. (hereinafter "Centurion"which expression shall include its successors,
administrators and permitted assigns) a Company organised and existing under the
laws of Nebraska of the Other Part,

WITNESSETH:

1.       Finglas hereby grants to Centurion the option exercisable at any time
         after the 1st January 2003 to buy the interest of Finglas in the
         Patents specified in the Schedule hereto subject to a Licence Agreement
         in favour of Centurion International Limited for the price or sum of IR
         pound sterling 1 subject to Centurion discharging any amount which may
         be owing to Finglas at the time of exercise of the option in respect of
         Licence fees or otherwise by any subsidiary or of Centurion or any of
         their permitted assigns.

2.1      The said Option is exercisable by one months notice in writing from
         Centurion to Finglas at any time after the 1st January 2003 and shall
         be sent by first class mail or air mail or by fax to the address of
         Finglas as set out at the head of this Agreement or to such other
         address or fax number as Finglas may from time to time notify to
         Centurion.

2.2      The said Option shall be immediately exercisable in the event of
         Finglas admitting in writing its insolvency or in the event of
         proceedings being taken to appoint a receiver, examiner or liquidator
         over any or all of the assets or undertaking of Finglas and shall be
         binding upon any such receiver, examiner or liquidator.

3.       Finglas agrees to execute such formal Assignments of the Patents at any
         time after the exercise of the Option as may be necessary or
         appropriate for registration with Patent Offices and other relevant
         authorities.

4.       The validity construction and performance of this Agreement shall be
         governed by the Law of the Republic of Ireland and shall be subject to
         the exclusive jurisdiction of the Irish Courts.

5.       Finglas agrees not to assign or encumber the Patents prior to the
         exercise of the Option without the consent of Centurion.

6.       Finglas warrants (a) that it has full title to the Patents; and (b)
         that to the actual knowledge of Finglas, Finglas has not interfered
         with, infringed upon, misappropriated or
<PAGE>   2
         otherwise come into conflict with the proprietary rights of any third
         parties in relation to the Patents.

7.       Arbitration Procedure

         a)       Except as otherwise expressly provided herein, all claims or
                  controversies between the parties (or their permitted
                  assignees) arising out of or related to this Agreement shall
                  be finally determined by arbitration in accordance with the
                  rules in affect from time to time of the Chartered Institute
                  of Arbitrators in Ireland by one Arbitrator (selected in
                  default of Agreement between the parties by the President for
                  the time being of the Law Society of Ireland) who is
                  knowledgable concerning the Law governing the dispute and such
                  Arbitration shall constitute an Arbitration for the purposes
                  of the Arbitration Acts 1954 to 1980.

         b)       The arbitration shall take place in Dublin, Ireland and the
                  Language of the arbitration shall be English.

         c)       The arbitrator shall be empowered to permit reasonable
                  discovery and shall have the authority to award all forms of
                  relief determined to be just and equitable. Any arbitral award
                  rendered pursuant to this clause shall be final and binding on
                  Buyer and Seller and may be enforced in any court of competent
                  jurisdiction. For this and any other purpose, each of Buyer
                  and Seller (i) waives any bond, surety or other security that
                  might be required of any other party with respect thereto, and
                  (ii) agrees that any part may make service on any other Party
                  by sending or delivery a copy of the process to such Party at
                  the address and in the manner provided for the giving of
                  notices in Section 8 below or in any other manner permitted by
                  law.

         d)       In all instances of arbitration, the costs of arbitration
                  shall be borne by the unsuccessful party, except in the event
                  that determination of success is not clear- cut, in which case
                  the costs of arbitration shall be allocated by the arbitrator,
                  having due regard for the nature of the dispute, the
                  contentions of the parties and his or her decision on the
                  merits of the dispute.

8.       Notices

         All notices, demands, and other communications given or delivered under
         this Agreement will be in writing and will be deemed to have been given
         when personally delivered, mailed by first class mail or recorded post
         or delivered by express courier service or telecopied. Notices, demands
         and communications will, unless another address is specified in
         writing, be sent to the address indicated above in the case of Licensee
         for the attention of Gary Kuck and in the case of Finglas for the
         attention of Peter Crowley,
<PAGE>   3
                                   SCHEDULE I
                                   The Patents

<TABLE>
<CAPTION>
PRODUCT TYPE             JURISDICTION     PATENT No.      APPLICATION No.
<S>                      <C>              <C>             <C>
Plated Helix (II)        U.K.             N/A                 C766.00/S
Top Loading Cylinder     Ireland          566918              (S950767)
</TABLE>

IN WITNESS WHEREOF the parties have caused this Agreement to be executed by
their duly authorised representatives the day and year first herein written.

SIGNED for and on behalf of
FINGLAS TECHNOLOGIES LTD.                        /s/ James A. Boyle
by
in the presence of: Michael J. McGinley          /s/ Michael J. McGinley

SIGNED for and on behalf of
CENTURION by                                     /s/ Robert H. Getz
in the presence of:                              /s/ V. Stoiljkovic<PAGE>   1

                                                                  EXHIBIT 10.13

Confidential Treatment. The portions of this exhibit that have been replaced
with "[*****]" have been filed separately with the Securities and Exchange
Commission and are the subject of an application for confidential treatment.

                              DEVELOPMENT AGREEMENT

                           Entered into by and between

                            Dell Computer Corporation
                                       And
                          Centurion International Inc.

Centurion agrees to design an internal antenna assembly for the Dell L2 laptop
computer project. The antenna assembly will meet a mutually agreed upon
mechanical and electrical performance specification. Centurion will provide
Dell with test measurement data and functional antenna assembly samples to
establish and confirm the performance.

The antenna assembly will consist of a 2.4 GHz single element with attached
coaxial cable terminated to a PCB with a Hirose connector. Reference Centurion
print #CAF95885.

Centurion will apply antenna technology and intellectual property and will
offer the design to Dell with no charge for non-recurring engineering
development. Should the design be acceptable, Dell will agree to purchase from
Centurion a minimum of [*****] over a period of [*****] from the start of
manufacturing at a price of no more than $[*****]. Volumes and price after the
first year will be negotiated.

Should a second production source be assigned using the Centurion design, Dell
agrees to assign a minimum of [*****]% the production volume to Centurion and
pay a royalty of [*****]% of purchase price to Centurion on all antennas
purchased from the second source.

Dell agrees that if the design is accepted and less than [*****] is purchased
within [*****], or Centurion is assigned less than [*****]% of the production
volume (minimum of [*****] annually), Dell will pay Centurion, engineering
development costs of $[*****], and a royalty of [*****]% of the selling price on
all antennas purchased from all other sources for the L2 program.

If the Centurion design is not accepted, Dell agrees to return all samples and
documents associated with the project with the terms and conditions of NDA #
99121607 continue in effect.

Centurion will retain the rights and ownership of the antenna technology and
intellectual property developed by Centurion and used for this design.

Dell Computer Corp.                          Centurion International Inc.

BY: /S/ DAVE BROWN                           BY: /S/ MARK G. COCKSON
    -------------------                          ---------------------

Name:      Dave Brown                        Name:  Mark G. Cockson
     ------------------

Date:      7-7-00                            Date:  June 26, 2000
     ------------------

****[Confidential]

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