Radar ranging system for use with sloping target

Details Radar ranging system for use with sloping target Radar ranging system for use with sloping target

1981-05-26

1984-03-06

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 12R, 266 99, G01S 1332

Patent

active

044357095

ABSTRACT:
A signal processing system for use with a radar ranging system which transmits a radio frequency beam of finite angle to a sloping target of not greater than some known slope and creates from the return signal a beat frequency signal comprising various frequencies corresponding to the various distances from the ranging system to the target. The processing system includes a first tracking bandpass filter which is caused to seek and lock onto the lowest frequency F.sub.L in the beat frequency signal. Given frequency F.sub.L, the angle of the beam and the maximum slope of the target, a theoretical maximum frequency F.sub.X is computed. A second tracking bandpass filter tracks down from frequency F.sub.X to and locks onto frequency F.sub.H, the frequency component in the beat frequency signal associated with the maximum range to the target. From frequencies F.sub.L and F.sub.H and the beam angle, the average range to and/or slope of the target can be computed.

REFERENCES:
patent: 3337867 (1967-08-01), Badewitz
patent: 3362024 (1968-01-01), Badewitz
patent: 3472471 (1969-10-01), Badewitz
patent: 3670334 (1972-06-01), Gaheen, Jr.
patent: 4219814 (1980-08-01), Johnson
patent: 4290067 (1981-09-01), Legille et al.
patent: 4325066 (1982-04-01), Grettenberg
patent: 4332374 (1982-06-01), Kremer

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