Communications: directive radio wave systems and devices (e.g. – With particular circuit – For frequency modulation
Patent
1980-12-29
1993-06-29
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
For frequency modulation
342173, G01S 728
Patent
active
052238423
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 radomeinduced 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: 3680105 (1972-07-01), Goldstone
patent: 4003054 (1977-01-01), Goldstone
patent: 4028700 (1977-06-01), Carey et al.
patent: 4123719 (1978-10-01), Hopwood et al.
patent: 4313170 (1982-01-01), Lewis et al.
Mangiapane Rosario
Okurowski Frank A.
Mofford Donald F.
Raytheon Company
Sharkansky Richard M.
Tubbesing T. H.
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