Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1980-07-03
1982-10-19
Buczinski, S. C.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 9PS, 367 88, G01S 1300, G01S 1390
Patent
active
043553117
ABSTRACT:
A single-frequency multibeam synthetic aperture radar for large swath imaging is disclosed. Each beam illuminates a separate "footprint" (i.e., range and azimuth interval). The distinct azimuth intervals for the separate beams produce a distinct Doppler frequency spectrum for each beam. After range correlation of raw data, an optical processor develops image data for the different beams by spatially separating the beams to place each beam of different Doppler frequency spectrum in a different location in the frequency plane as well as the imaging plane of the optical processor. Selection of a beam for imaging may be made in the frequency plane by adjusting the position of an aperture, or in the image plane by adjusting the position of a slit. The raw data may also be processed in digital form in an analogous manner.
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Frosch Robert A. Administrator of the National Aeronautics and Space
Jain Atul
Buczinski S. C.
Manning John R.
McCaul Paul F.
Mott Monte F.
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