Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Patent
1980-12-29
1992-12-22
Tobbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
342 90, 342149, 342159, 342160, G01S 1344, G01S 1390
Patent
active
051737035
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. Motions 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: 3860924 (1975-01-01), Evans
patent: 4068231 (1978-01-01), Wilmot
patent: 4217585 (1980-08-01), Fishbein et al.
patent: 4993994 (1990-11-01), Goggins
Long Albert H.
Mangiapane Rosario
Ogar George W.
Mofford Donald F.
Raytheon Company
Sharkansky Richard M.
Tobbesing T. H.
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