Aircraft radar antenna

Details Aircraft radar antenna Aircraft radar antenna

1988-05-19

1990-07-03

Hille, Rolf

Communications: radio wave antennas

Antennas

With aircraft

343778, H01Q 128

Patent

active

049395238

ABSTRACT:
In an aircraft on-board radar system employing a sharply focused directional pattern which is able to sweep over a given space range, the range in the MPRF mode is limited primarily by the ground clutter picked up via the side lobes of the antenna pattern. To increase the range, an antenna is employed which, due to asymmetrical distribution of the antenna aperture (signal field) in the elevational direction with respect to the center of the aperture, has a significantly higher side lobe spacing below the principal lobe than above the principal lobe. Because of the side lobe spacing being greater below the principal lobe, less ground clutter components are picked up while the smaller side lobe spacing above the principal lobe results in hardly any increase of clutter components in the echo signal.

REFERENCES:
patent: 3308468 (1967-03-01), Hannan
patent: 3355738 (1967-11-01), Algeo
patent: 4150378 (1979-04-01), Barton
patent: 4347516 (1982-08-01), Shrekenhamer
"Antenna Theory and Design", R. S. Elliott, 1981, Prentice-Hall, Inc.

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