US Patent No: 6,417,804
Number of patents in Portfolio can not be more than 2000
Control device for the formation of several simultaneous radar reception beams for an electronic scanning antenna
Stats
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Jul 9, 2002
Issued date -
Oct 26, 2000
filing date -
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09/696,166
serial no -
Expired
status (Note)
Importance
Abstract
A control device for the formation of plural simultaneous radar reception beams in an electronic scanning antenna. The electronic scanning antenna includes an array of detectors of a reception microwave signal arranged in n columns and m rows. The control device makes, in the microwave domain, a first partial combination of the signals received, the first combination being made according to each column. An optical device makes a second partial combination in the optical domain, the optical device including at least n optical sources each producing an optical signal modulated at the frequency of the reception microwave signal by an associated microwave combination signal. The optical signal is divided into r optical signals to obtain nxr optical signals. An optical phase-shifting device is provided for each of the nxr optical signals obtained, and r combining devices combine each group of n optical signals, and r detectors detect the microwave signal f assigned to each group of n optical signals to form r microwave reception beams. The control device can be applied especially to a simple and flexible reconfiguration of reception beams of an electronic scanning antenna.
First Claim
Family
International Classification(s)
Cited Art Landscape
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| * 4,725,844 Fiber optical discrete phase modulation system | 42 | 1987 | |
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| 5,861,845 Wideband phased array antennas and methods | 46 | 1998 | |
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| * 5,131,748 Broadband optical detection of transient motion from a scattering surface by two-wave mixing in a photorefractive crystal | 43 | 1991 | |
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| * 4,686,533 Optoelectronically switched phase shifter for radar and satellite phased array antennas | 16 | 1983 | |
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| * 5,917,970 Wavelength multiplexed, electro-optically controllable, fiber optic multi-tap delay line | 15 | 1998 | |
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| * 5,909,297 Drift compensating circuit for optical modulators in an optical system | 36 | 1997 | |