Advanced Anti-Jam GPS Antenna Design Concepts

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-03-M-0271
Agency Tracking Number: N033-0094
Amount: $69,950.00
Phase: Phase I
Program: STTR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
22560 Glenn Drive, Suite 114, Sterling, VA, 20164
DUNS: 107931859
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Joseph Jahoda
 Chief Technical Officer
 (703) 450-5517
Business Contact
 James Jalbert
Title: President/CEO
Phone: (703) 450-5517
Research Institution
 Warren L Stutzman
 621 Whittemore Hall
Blacksburg, VA, 24061
 (540) 231-6834
 Nonprofit college or university
The objective of the Advanced Anti-jam Design Techniques effort is to make a controlled Radiation Pattern Antenna (CRPA) have more elements without increasing the size, or make it the same antenna (i.e., same number of elements) smaller. The moreradiating elements that are available in a CRPA design, the more response nulls can be directed towards jammers. The inherent design problem that needs to be overcome is that the Objective GPS antenna requires closer element spacing and as a result,traditional CRPA antenna performance suffers from the electromagnetic effects of close element spacing. The cause of the performance shortfall is excessive mutual coupling, which causes the nulling algorithms to hunt longer or settle more slowly on asolution. Also, traditional CRPA antennas have insufficient pattern slope, which adversely effect antenna gain in the desired directions of reception. This effort will result in smaller antennas that have enhanced beam-forming and null-steeringcapabilities. Although this performance is of particular benefit in military applications, to suppress jammer signals, the approach can also be used to suppress other noise sources and signal multi-path. Therefore these antennas are valuable to theprivate sector as well as to the military.

* Information listed above is at the time of submission. *

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