An Anti-Jam Manpack Antenna for Global Positioning System Application

The GPS Anti-Jam Manpack Antenna (AJMA) system is an ECCM addition to the GPS manpack/vehicular user equipment which will minimize GPS receiver performance degradation due to a jammer by steering a null into the direction of the interference source. Operating strictly at the GPS RF signal level AJMA...

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Bibliographic Details
Main Authors: Gray, Jack, DeSantis, Charles M
Format: Report
Language:English
Subjects:
ANTENNA ARRAYS
AREA COVERAGE
DIRECTIONAL ANTENNAS
GLOBAL POSITIONING SYSTEM
L band
MANPORTABLE EQUIPMENT
NAVIGATION SATELLITES
PASSIVE SYSTEMS
Planar arrays
RADIO ANTIJAMMING
Radio Countermeasures
Radio position finding
RADIO RECEIVERS
RADIOFREQUENCY INTERFERENCE
SIGNAL TO NOISE RATIO
SPREAD SPECTRUM
Unmanned Spacecraft
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Summary:The GPS Anti-Jam Manpack Antenna (AJMA) system is an ECCM addition to the GPS manpack/vehicular user equipment which will minimize GPS receiver performance degradation due to a jammer by steering a null into the direction of the interference source. Operating strictly at the GPS RF signal level AJMA will easily interface with a GPS receiver without modification and add minimal signal degradation. From results of the experiments described, it is concluded that there exists a feasible method of using null-steering antenna systems to counter CW jammer threats. A number of AJMA configurations were applied successfully and tested practically. (Author)