Small tuned-element GPS antennas for anti-jam adaptive...

Details Small tuned-element GPS antennas for anti-jam adaptive... Small tuned-element GPS antennas for anti-jam adaptive...

2006-03-31

2008-11-11

Nguyen, Hoang V (Department: 2821)

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

C343S853000, C343S844000

Reexamination Certificate

active

07450082

ABSTRACT:
A GPS antenna with anti-jam capabilities utilizes eight resonant loop radiator elements in a resonant exciter configuration to make available a primary and up to seven auxiliary antenna patterns usable with multi-pattern adaptive processing for anti-jam operation. Antennas as described enable desired radiation characteristics to be provided in a configuration of small size suitable for replacement of existing GPS aircraft antennas which lack anti-jam capabilities, in order to enable reliable GPS reception during airborne operations in the presence of interference or jamming. With enablement of multi-pattern adaptive processing, reduced-gain pattern notches or nulls may be employed to track and reduce the effect of incident signals which would otherwise jam or interfere with reception of GPS signals.

REFERENCES:
patent: 3811127 (1974-05-01), Griffee et al.
patent: 5006859 (1991-04-01), Wong et al.
patent: 5521610 (1996-05-01), Rodal
patent: 5966102 (1999-10-01), Runyon
patent: 6618016 (2003-09-01), Hannan et al.
patent: 6819291 (2004-11-01), Lackey et al.
Microwave Scanning Antennas, R. C. Hansen, Academic Press, 1966, p. 261.

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