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Radar for ground speed measurement

  • US 20050128127A1
  • Filed: 11/07/2003
  • Published: 06/16/2005
  • Est. Priority Date: 11/06/2003
  • Status: Abandoned Application
First Claim
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1. A radar transducer comprising:

  • an antenna for transmitting electromagnetic waves at a predetermined frequency and for receiving reflected waves at a second frequency Doppler shifted from the predetermined frequency;

    a microwave transceiver for supplying to and receiving from the antenna the electromagnetic waves and detecting a Doppler frequency;

    an output cable;

    an electrical processing section for processing the Doppler frequency and for communicating with the output cable, the electrical processing section including;

    an analogue section arranged for receiving and amplifying the Doppler frequency having at least an amplifier and a threshold comparator for comparing a sine wave amplitude with a predetermined threshold for generation of an output pulse only when the amplified amplitude exceeds the predetermined threshold;

    and a processor for processing the sequence of digital pulses generated by the analogue section in accordance with a processing program and for generating an output to the output cable in response to the processing of the digital pulses;

    and a housing for containing the antenna, the microwave transceiver and the electrical processing section and for receiving and locating an inner end of the output cable;

    wherein the processor is programmed to carry out a test of the operation of the microwave transceiver and to provide a failure output signal to the cable in the event that the operation is found to be outside predetermined parameters.

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