Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Reexamination Certificate
2005-03-01
2005-03-01
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
C342S357490, C342S359000, C342S362000, C342S370000, C342S371000, C342S430000
Reexamination Certificate
active
06861983
ABSTRACT:
A method and apparatus for reducing electromagnetic interference (EMI) and jamming in Global Positioning System (GPS) receivers operating on rolling or spinning platforms and/or environments is provided. An antenna system having a pair of diametrically-mounted elements provides interferometric cancellation for spatial and polarization nulling of interference signals. The antenna system, operating in conjunction with multiplexing and anti-jamming electronics, provides interference suppression for a GPS receiver connected thereto. Interference cancellation is provided in jamming and non-jamming environments by selectively employing spatial or polarization nulling of the interference signal.
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Casabona Mario M.
Rosen Murray W.
Van Alstine David J.
Electro Radiation, Inc.
Mull F H
Tarcza Thomas H.
Wolff & Samson PC
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