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Decoherence plate for use in a communications system

  • US 7,450,080 B2
  • Filed: 04/11/2005
  • Issued: 11/11/2008
  • Est. Priority Date: 07/03/2003
  • Status: Active Grant
First Claim
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1. An antenna module, comprising:

  • a first antenna;

    a second antenna; and

    a decoherence plate separated from both the first antenna and the second antenna by respective distances along a line connecting the first antenna and second antenna, the decoherence plate having a surface positioned substantially in a plane that is substantially perpendicular to the line connecting the first antenna and the second antenna, wherein for each first path from the first antenna to the plane to the second antenna in a plurality of paths having a predefined range of path lengths there is a corresponding second path, from the first antenna to the plane to the second antenna, that is substantially 180°

    out of phase with the first path for a respective wavelength in one or more electromagnetic signals transmitted by the first antenna, thereby reducing a field coupling between the first antenna and the second antenna.

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