Antenna system and RF signal interference abatement method
First Claim
1. A robust GPS system comprising;
- (a) a plurality of GPS satellites each transmitting a GPS signal;
(b) a plurality of airborne GPS platforms, each GPS platform including a GPS receiver for receiving GPS signals from a number of visible GPS satellites, each airborne platform also including a GPS transmitter for transmitting its own GPS signal, the GPS signals being transmitted from the plurality of airborne GPS platforms being differentiated from the GPS signals transmitted by the visible GPS satellites;
(c) at least one terrestrially located GPS receiver for receiving the GPS signals transmitted by visible ones of the GPS satellites and by visible ones of said airborne GPS platforms.
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Accused Products
Abstract
Disclosed is an antenna system including a Luneberg Lens having a spherically shaped outer surface and a spherically shaped focal surface spaced from its outer surface with a plurality of patch antenna elements disposed along the focal surface of the Luneberg Lens; and a power combiner for combining signals received by said plurality of patch antenna elements. The disclosed antenna system may be used a part of a robust GPS system having a plurality of GPS satellites each transmitting a GPS signal; a plurality of airborne GPS platforms, each GPS platform including a GPS transmitter for transmitting its own GPS signal, the GPS signals being transmitted from the plurality of airborne GPS platforms being differentiated from the GPS signals transmitted by visible GPS satellites; and at least one terrestrially located GPS receiver for receiving the GPS signals transmitted by visible ones of the GPS satellites and by visible ones of said airborne GPS platforms.
30 Citations
28 Claims
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1. A robust GPS system comprising;
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(a) a plurality of GPS satellites each transmitting a GPS signal; (b) a plurality of airborne GPS platforms, each GPS platform including a GPS receiver for receiving GPS signals from a number of visible GPS satellites, each airborne platform also including a GPS transmitter for transmitting its own GPS signal, the GPS signals being transmitted from the plurality of airborne GPS platforms being differentiated from the GPS signals transmitted by the visible GPS satellites; (c) at least one terrestrially located GPS receiver for receiving the GPS signals transmitted by visible ones of the GPS satellites and by visible ones of said airborne GPS platforms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for reducing potential interference to a GPS receiver responsive to GPS signals transmitted from a constellation of GPS satellites, the method comprising:
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deploying air vehicles each serving as a platform for a secondary GPS position and timing reference transmitter, each platform including a receiver for receiving GPS signals from the GPS satellite constellation; transmitting the secondary GPS position and timing reference information from the transmitters on the air vehicles, the secondary GPS position and timing reference information being based upon the GPS signals received from the GPS satellite constellation at each platform; and receiving the secondary GPS position and timing reference information from the transmitters on one or more of the air vehicles at said GPS receiver. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification