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Phased array antenna choke plate method and apparatus

  • US 7,295,165 B2
  • Filed: 08/26/2005
  • Issued: 11/13/2007
  • Est. Priority Date: 04/22/2005
  • Status: Active Grant
First Claim
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1. An antenna choke apparatus adapted for use with an antenna aperture on an exterior surface of an airborne mobile platform, the apparatus comprising:

  • a choke plate having an area for circumscribing at least a portion of said antenna aperture, the choke plate having a thickness such that when said choke plate and said antenna aperture are mounted on said exterior surface, an upper surface of said choke plate is disposed at a desired height relative to an upper surface of said antenna aperture;

    a plurality of grooves formed in said upper surface of said choke plate for attenuating electromagnetic wave (EM) radiation from said antenna aperture below a predetermined elevation angle; and

    wherein each of said grooves has a bottom wall with radiused corners.

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