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Systems and methods for antenna calibration

  • US 8,049,662 B2
  • Filed: 01/15/2008
  • Issued: 11/01/2011
  • Est. Priority Date: 07/23/2007
  • Status: Active Grant
First Claim
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1. A method for determining a phase offset comprising:

  • simultaneously providing a calibration signal to a first element of an antenna and a second element of the antenna opposite the first element;

    receiving a first intermix signal by a third element of the antenna;

    measuring an amplitude characteristic for the first intermix signal;

    determining the phase offset based on the amplitude characteristic;

    receiving a second intermix signal by a fourth antenna element; and

    measuring a second amplitude characteristic for the second intermix signal received by the fourth element;

    wherein determining the phase offset comprises;

    determining a first phase for the calibration signal from the first antenna element that produces a first predetermined amplitude characteristic for the first intermix signal;

    determining a second phase for the calibration signal from the first antenna element that results in a second predetermined amplitude characteristic for the second intermix signal; and

    employing a determined value of the first phase and a determined value of the second phase to determine the phase offset.

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