Anti-Jam Improvements by Combining Remotely Located Global Positioning System (GPS) Antennas on an Unpiloted/Uninhabited Aerial Vehicle (UAV) Platform

Award Information
Agency:
Department of Defense
Branch:
Air Force
Amount:
$99,663.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
FA8650-09-M-1574
Agency Tracking Number:
F083-159-1556
Solicitation Year:
2008
Solicitation Topic Code:
AF083-159
Solicitation Number:
2008.3
Small Business Information
Applied EM Inc.
144 Research Drive, Hampton, VA, 23666
Hubzone Owned:
N
Socially and Economically Disadvantaged:
Y
Woman Owned:
N
Duns:
782587406
Principal Investigator
  C.J.Reddy
 President
 (757) 224-2035
 cjreddy@appliedem.com
Business Contact
  C.J.Reddy
Title: President
Phone: (757) 224-2035
Email: cjreddy@appliedem.com
Research Institution
N/A
Abstract
Currently, there are two types of antenna configurations which are used with GPS receivers, fixed reception pattern antenna (FRPA) and controlled reception pattern antenna (CRPA). FRPA is a single element antenna and can not use angle of arrival as a discriminator to suppress interfering or jamming signals. CRPA is an array of antenna elements with the ability to reject interference signals. Many DoD platforms use FRPA due to the cost, size and weight issues. Also, a given platform may have many GPS FRPA to support various communication/ radar/ navigation systems on board the platform. Applied EM proposes a thorough performance evaluation of GPS antenna electronics when conventional antennas (GAS-1 CRPA, GAS-1N CRPA, etc.) are replaced with a set of GPS FRPA. The performance evaluation will be carried out under the jamming scenarios of interest for selected FRPA distributions. The goal will be to come up a distribution consisting of four or seven FRPA which lead to the best AJ performance. The AJ performance of the two FRPA distributions will be compared with the performance obtained using a GAS-1N CRPA and a GAS-1 CRPA, respectively. In Phase II, two antenna arrays will be built and their performance will be demonstrated. BENEFIT: The proposed solution is based on the development of a practical GPS AJ system for DoD platforms. Our research effort will also focus on implementation techniques with realistic FRPA designs which will help toward commercialization. This technology has applications in many military systems.

* information listed above is at the time of submission.

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