Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1982-06-25
1985-09-17
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 7A, G01S 1354
Patent
active
045423822
ABSTRACT:
Search radar apparatus containing an MTI video processing unit provided with: a canceller for generating video signals of moving targets; a zero-velocity filter for generating clutter video signals; a conditional circuit connected to the canceller and the filter for generating per range quant of each radar scan a clutter switching signal if for the rang quant the signal value obtained with filter is greater than the signal value obtained with the canceller; a combination circuit connected to said filter and the conditional circuit for selecting the clutter video signals present with the clutter switching signals and for determining therefrom a temporary clutter level in each clutter cell and each antenna revolution period; and clutter level indication means connected to the combination circuit for determining a standard clutter level per range-azimuth clutter cell of the radar range with the application of clutter video signals.
REFERENCES:
patent: 4119962 (1978-10-01), Lewis
patent: 4249178 (1981-02-01), Butler
patent: 4290066 (1981-09-01), Butler
patent: 4386353 (1983-05-01), Bleijerveld et al.
R. M. O'Donnell et al, "Automated Tracking for Aircraft Surveillance Radar Systems", IEEE Trans. AES, vol. 4, Jul. 1979, pp. 508-517.
M. I. Skolnik, "MTI and Pulse Doppler Radar", Introduction to Radar Systems, Chapter 4, pp. 101-151, 1980.
C. E. Muehe et al, "The Parallel Microprogrammed Processor (PMP)", International Conference Radar '77, Oct. 1977.
Hollandse Signaalapparaten B.V.
Kraus Robert J.
Sotomayor John B.
Tubbesing T. H.
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