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Retrofit Antijam Applique for Handheld GPS Receivers

Award Information

Department of Defense
Award ID:
Program Year/Program:
2002 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Wang Electro-Opto Corporation
2140 Newmarket Parkway Suite 120 Marietta, GA -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2002
Title: Retrofit Antijam Applique for Handheld GPS Receivers
Agency / Branch: DOD / ARMY
Contract: DAAB07-02-C-L401
Award Amount: $729,128.00


The land warrior has become increasingly dependent on handheld GPS (Global Positioning System) receivers for providing location information in high interference environments for Situation Awareness, etc. on modern battlefield. A solution is to replace thelegacy antenna with a relatively inexpensive smart antenna appliqu¿ to null out the jam. This smart antenna should be a direct replacement for the current antenna, without any change to the receiver, and with minimal consumption of battery power. A jamindicator and interference signal level measurement can be provided with manual activation of antijam operation only when jam is detected. In Phase-I, Wang Electro-Opto Corporation (WEO) successfully demonstrated the feasibility of such an antennaappliqu¿ for GPS L1 band. We propose a Phase-II program to expand the design to cover both L1 and L2 bands. Two approaches will be taken, one using conventional antennas, and the other using WEO's patented miniaturized slow-wave antenna. Brassboardantenna appliqu¿ with jam sensor and indicator with low power-consumption will be developed.

Principal Investigator:

Johnson Wang
Chief Scientist

Business Contact:

William Alverson
Senior Vice President
Small Business Information at Submission:

Wang Electro-Opto Corp.
2140 Newmarket Parkway, Suite 110 Marietta, GA 30067

EIN/Tax ID: 581945247
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No