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RADAR DEVICE

  • US 20130113653A1
  • Filed: 07/01/2011
  • Published: 05/09/2013
  • Est. Priority Date: 07/16/2010
  • Status: Active Grant
First Claim
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1. A radar device for transmitting a high-frequency transmission signal intermittently in a transmission cycle having a predetermined transmission period and a non-transmission period, receiving a signal reflected by a target by using a plurality of reception antennas, and detecting the target based on the reflected signal, the radar device comprising:

  • a transmission signal generator which generates a transmission signal in baseband;

    a RF transmitter which converts the transmission signal generated by the transmission signal generator into a high-frequency transmission signal;

    a directional coupler which distributes the high-frequency transmission signal converted by the RF transmitter in accordance with a predetermined signal power ratio;

    a level adjuster which adjusts the high-frequency transmission signal distributed by the directional coupler to a predetermined level;

    a signal combiner which combines a signal output from the level adjuster and a reception signal received by the reception antennas;

    a RF receiver which converts the signal combined by the signal combiner into a reception signal in the baseband;

    a reference transmission signal generator which generates a reference transmission signal the same as the transmission signal generated by the transmission signal generator;

    a correlation value calculator which calculates a correlation value between the reference transmission signal generated by the reference transmission signal generator and the reception signal converted by the RF receiver;

    a phase shift quantity calculator which calculates a phase shift quantity in arbitrary one of the reception antennas based on the correlation value in a reference reception antenna which is specific one of the reception antennas and the correlation value in any one of the other reception antennas; and

    a phase corrector which corrects a phase component of the correlation value in the arbitrary reception antenna based on the phase shift quantity calculated by the phase shift quantity calculator.

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