Cosite Interference Reduction for Electronic Attack Aircraft Navy SBIR FY2004.3 Sol No.: Navy SBIR FY2004.3 Topic No.: N04-238 Topic Title: Cosite Interference Reduction for Electronic Attack Aircraft Proposal No.: N043-238-0 Firm: Toyon Research Corp. Suite A 75 Aero Camino Goleta, California 93117-3139 Contact: Andrew Richen Phone: (805) 685-1746 Web Site: www.toyon.com Abstract: Modern military aircraft carry many microwave and RF systems which must operate in close proximity to one another. Radio frequency interference (RFI) is virtually inevitable. The EA-6B Prowler electronic warfare (EW) aircraft presents a particularly severe interoperability problem because its primary mission is to jam enemy radars. Specifically, the performance of life-critical identification, friend or foe (IFF) systems is degraded by spurious signals and harmonics from on-board jamming systems. Toyon Research Corporation proposes to design a shaped-pattern antenna or antennas to combat radio frequency interference to IFF and Link 16 systems on the EA-6B. We will use our novel anti-jam fixed reception pattern antenna (AJ-FRPA) design techniques to develop an antenna whose pattern is shaped to maximize isolation between the victim antenna and the jamming antenna. This antenna will be compact, passive, and a drop-in replacement for existing antennas on the aircraft. Benefits: In addition to the target application, RFI-resistant antennas will find utility on unmanned aerial vehicles (UAVs) where radars, telemetry, and communication links must operate simultaneously on within a very small space. This same technology has application in the private sector on aircraft large and small where additional immunity to intentional or incidental ground-based jamming of GPS and tactical navigation (TACAN) signals is desired. Return