Communications: directive radio wave systems and devices (e.g. – Return signal controls external device
Patent
1980-12-29
1993-07-06
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
342 62, 342 63, 364454, G01S 1388
Patent
active
052258386
ABSTRACT:
An AWTSS is shown to be made up of an improved synthetic aperture radar (SAR) for generating radar maps with various degrees of resolution required for navigation of an aircraft and detection of ground targets in the presence of electronic countermeasures and clutter. The SAR consists, in effect, of four frequency-agile radars sharing quadrants of a single array antenna mounted within a radome on a "four axis" gimbal with a sidelobe cancelling subarray mounted at the phase center of each quadrant. Motion sensors are also mounted on the single array antenna to provide signals for compensating for vibration and stored compensating signals are used to compensate for radome-induced errors. In addition, a signal processor is shown which is selectively operable to generate radar maps of any one of a number of desired degrees of resolution, such processor being adapted to operate in the presence of clutter or jamming signals.
REFERENCES:
patent: 3028592 (1962-04-01), Parr et al.
patent: 4325066 (1982-04-01), Grettenberg
Kanter Irving
Null Donald C.
Ogar George W.
Peregrim Theodore J.
Mofford Donald F.
Raytheon Company
Sharkansky Richard M.
Tubbesing T. H.
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