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Field compatible ESA calibration method

  • US 7,916,082 B1
  • Filed: 05/19/2009
  • Issued: 03/29/2011
  • Est. Priority Date: 05/19/2009
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • cycling a first beam steering control antenna element of an electronically scanned antenna (ESA) array through at least a first portion of a first set of beam steering control states for the first beam steering control antenna element;

    probing the first beam steering control antenna element while cycling the first beam steering control antenna element through the at least the first portion of the first set of beam steering control states;

    recording a first amplitude and a first phase for the electric field coupled from the ESA array to a probe for each one of the at least the first portion of the first set of beam steering control states;

    separating the recorded first amplitude and the recorded first phase into a first component and a second component;

    determining the amplitude and phase of the first beam steering control antenna element for each one of the first portion of the first set of beam steering control states utilizing the first component and the second component;

    cycling a second beam steering control antenna element of the ESA array through at least a first portion of a second set of beam steering control states for the second beam steering control antenna element;

    probing the second beam steering control antenna element while cycling the second beam steering control antenna element through the at least the first portion of the second set of beam steering control states;

    recording a second amplitude and a second phase for the electric field coupled from the ESA array to the probe for each one of the at least the first portion of the second set of beam steering control states;

    separating the recorded second amplitude and the recorded second phase into a third component and a fourth component;

    determining the amplitude and phase of the second beam steering control antenna element for each one of the first portion of the second set of beam steering control states utilizing the third component and the fourth component;

    calculating a difference between a first amplitude as a function of phase state for the first beam steering control antenna element and a second amplitude as a function of phase state for the second beam steering control antenna element; and

    verifying the first amplitude as a function of phase state for the first beam steering control antenna element and the second amplitude as a function of phase state for the second beam steering control antenna element.

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