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Foliage-penetration surveillance radar

  • US 4,608,566 A
  • Filed: 12/16/1981
  • Issued: 08/26/1986
  • Est. Priority Date: 12/16/1981
  • Status: Expired due to Fees
First Claim
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1. In a surveillance system of the type utilizing a radar system for the monitoring of moving objects within a perimeter of surveillance that includes trees and plants bearing foliage, the combination comprising:

  • transmitter means for transmitting a modulated RF signal to illuminate the area under surveillance,receiver means for receiving reflections of said transmitted RF signal,signal processing circuit means coupled to said receiver means for providing an output signal which indicates azimuthal direction of a detected target with respect to the radar site, said signal processing circuit means includes a first summing circuit for summing and sampling inbound signals and a second summing circuit for summing and sampling outbound signals and divider circuit means connected to each of said first and second summing circuits for dividing the sums by the number of samples taken which is proportional to the length of time the signal remains either positive or negative to prevent full cycle integration to remove clutter when the output signal is fluctuating back and forth between positive and negative polarities.

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