Doppler radar for detection and localization of helicopters

Details Doppler radar for detection and localization of helicopters Doppler radar for detection and localization of helicopters

1980-07-10

1982-08-24

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 16M, 343 172PC, G01S 1352, G01S 1328, G01S 1344

Patent

active

043463827

ABSTRACT:
A monopulse radar system in which circuits are included for specific identification of echoes from helicopters vis-avis other echoes. The identification is based on either the large Doppler spectrum of a helicopter echo or the amplitude modulation thereof, or both. Embodiments are shown which utilize these criteria for identification as well as bearing refinement. The apparatus is effective, even when a helicopter is hidden from the full view of the radar by foliage.

REFERENCES:
patent: 4038656 (1977-07-01), Webb, Jr. et al.
patent: 4241350 (1980-12-01), Uffelman
patent: 4275396 (1981-06-01), Jacomini

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