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Microwave detection system and method

  • US 7,439,876 B2
  • Filed: 05/31/2006
  • Issued: 10/21/2008
  • Est. Priority Date: 08/02/2005
  • Status: Active Grant
First Claim
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1. A microwave detection system comprising:

  • a transmitter configured to transmit a signal along a path to detect an intruder to a monitored zone;

    a modulating reflector configured to receive the transmitted signal to generate a modulated signal having a characteristic introduced by said modulating reflector, said modulating reflector configured to transmit the modulated signal;

    a receiver located to receive the modulated signal;

    an adaptive threshold adjustment unit configured for providing a variable detection threshold responsive to a change in a gain of the system; and

    a processor configured for processing the modulated signal provided by the receiver and configured for measuring a characteristic in the processed modulated signal with respect to the variable detection threshold provided by the adaptive threshold adjustment unit.

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