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Array antenna calibration apparatus and array antenna calibration method

  • US 6,747,595 B2
  • Filed: 01/17/2003
  • Issued: 06/08/2004
  • Est. Priority Date: 01/21/2002
  • Status: Active Grant
First Claim
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1. An array antenna calibration apparatus comprising:

  • supply means for simultaneously supplying original calibration signals to a plurality of adjacent antenna elements constituting an array antenna, respectively, the original calibration signals being orthogonal to one another among the antenna elements;

    phase and amplitude characteristic calculation means for obtaining phase and amplitude characteristics by calculating correlations between calibration signals, emitted from the antenna elements and received by the adjacent antenna elements, and the original calibration signals related to the received calibration signals;

    relative calibration factor calculation means for obtaining a relative calibration factor among all the antenna elements constituting the array antenna based on the phase and amplitude characteristics of the respective antenna elements obtained from said phase and amplitude characteristic calibration means; and

    calibration means for calibrating transmission signals to be supplied to the respective antenna elements based on the relative calibration factor.

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