Stepped beam active array antenna and radar system employing sam

Details Stepped beam active array antenna and radar system employing sam Stepped beam active array antenna and radar system employing sam

1995-06-06

1996-12-10

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

342 70, 342157, 342158, 342371, 343700MS, 343911R, G01S 728

Patent

active

055835112

ABSTRACT:
A stepped beam transmit antenna that comprises a feed array that includes a dielectric substrate and a plurality of radiating elements disposed on the substrate. The radiating elements each comprise two coplanar and coextensive fins that are separated by a narrow gap and that are tapered at their radiating end to form a linear tapered slot feed aperture. Beam position inputs are disposed at respective input ends of each of the radiating elements. A backshort is disposed adjacent the tapered slot feed aperture of each of the radiating elements. A low pass filter is disposed adjacent the backshort of each of the radiating elements. A switching diode is disposed between the backshort and the tapered slot feed aperture of each of the radiating elements. The antenna includes a power distribution network comprising a suspended printed line. A lens is disposed adjacent the feed array for projecting energy beams produced by the antenna. A radar system is also disclosed that has a transmitter coupled to the transmit antenna, and a receive beam antenna that is coupled to a radar signal processor for processing radar return signals to produce a radar image.

REFERENCES:
patent: 5255004 (1993-10-01), Berkowitz et al.
patent: 5420595 (1995-05-01), Zhang et al.
patent: 5486832 (1996-01-01), Hulderman

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