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Doppler radar system for automotive vehicles

  • US 5,481,268 A
  • Filed: 07/20/1994
  • Issued: 01/02/1996
  • Est. Priority Date: 07/20/1994
  • Status: Expired due to Term
First Claim
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1. A Doppler radar system for an automotive vehicle, comprisinga transmitter module comprising a first monolithic microwave integrated circuit (MMIC) chip for generating a transmit signal and a first waveguide antenna system connected to said transmitter MMIC chip for transmitting said transmit signal;

  • said first MMIC chip comprising a voltage controlled oscillator (VCO) for generating a VCO frequency signal and a multiplier connected between said VCO and said first waveguide antenna system for multiplying said VCO frequency signal to produce said transmit signal;

    a receiver module comprising a second MMIC chip and a second waveguide antenna system connected to said second MMIC chip for receiving a reflected transmit signal;

    said second MMIC chip comprising a low noise receiver amplifier connected to said second waveguide antenna system, said low noise receiver amplifier including;

    means for mounting said transmitter module and said receiver module; and

    means for coupling said transmitter VCO frequency signal generated by said first MMIC chip to said second MMIC chip by electromagnetic radiation.

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