Virtual antenna extension for sampled aperture arrays
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United States of America Patent
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May 2, 2017
Grant Date -
Jul 17, 2014
app pub date -
Jan 15, 2013
filing date -
Jan 15, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A high frequency surface wave radar (HFSWR) system with improved performance. Two or more transmitters including separate transmitting antennas (120, 122, 410) are used to improve the performance of the HFSWR over the performance of a comparable system with a single transmitter. In one embodiment, two transmitters are used, and configured to transmit pulses alternately, with a time interval of at least a round-trip travel time corresponding to a maximum target range between any pair of transmitted pulses. A physical receiving antenna array (130) includes a plurality of receiving antenna elements (135), and is connected to receiver circuitry configured to distinguish returns corresponding to pulses emitted by the different transmitters. The returns are concatenated in the receiver circuitry to achieve improved resolution.
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