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LOW COST ELECTRONICALLY SCANNED ARRAY ANTENNA

  • US 20100171674A1
  • Filed: 01/08/2009
  • Published: 07/08/2010
  • Est. Priority Date: 01/08/2009
  • Status: Active Grant
First Claim
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1. An electronically scanned array (ESA) antenna, comprising:

  • a main line along which an electromagnetic traveling wave may propagate; and

    a plurality of array elements distributed along the main line, each of the plurality of array elements comprising;

    a branch line;

    a directional coupler having a first port in the main line, a second port in the main line, a third port in the branch line, and a fourth port in the branch line;

    a reflective termination at an end of the branch line closest to the third port of the directional coupler;

    an electronically controlled phase shifter between the third port of the directional coupler and the reflective termination; and

    an antenna radiator at the end of the branch line closest to the fourth port of the directional coupler.

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