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Short range micro-power impulse radar with high resolution swept range gate with damped transmit and receive cavities

  • US 5,774,091 A
  • Filed: 05/26/1995
  • Issued: 06/30/1998
  • Est. Priority Date: 04/12/1993
  • Status: Expired due to Term
First Claim
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1. A radar for detecting characteristics of objects within a field, comprising:

  • a transmitter, including a shielded transmit cavity and a transmit antenna within the shielded transmit cavity, which transmits a sequence of electromagnetic signals from the transmit antenna into the field in response to a transmit timing signal;

    a receiver, including a shielded receive cavity and a receive antenna within the shielded receive cavity, which samples echoes from objects in the field of the sequence of electromagnetic signals with controlled timing, in response to a receive timing signal, and generates a sample signal in response to the samples;

    a timing circuit which supplies the transmit timing signal to the transmitter and supplies the receive timing signal to the receiver, the receive timing signal causing the receiver to sample the echoes such that time between transmission of signals in the sequence and sampling by the receiver sweeps over a range of delays; and

    means, connected to the receive and transmit cavities, for reducing clutter in the sample signal.

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