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Dual polarization frequency selective medium for diplexing two close bands at an incident angle

  • US 5,959,594 A
  • Filed: 03/04/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 03/04/1997
  • Status: Expired due to Term
First Claim
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1. A frequency selective medium for receiving electromagnetic radiation signals incident at an off normal angle, transmitting signals of a predetermined frequency range and reflecting other frequency signals, said frequency selected medium comprising:

  • (a) a dielectric substrate having a first surface and a second surface that is substantially parallel with the first surface;

    (b) a first array of conductive cross-dipole elements on the first surface;

    (c) a second array of conductive cross-dipole elements on the second surface, the first and second arrays each having a conductive surface; and

    (d) each said conductive cross-dipole element comprising;

    i) a horizontal dipole having a first dimension;

    ii) a vertical dipole that is substantially perpendicular to the horizontal dipole and having a second dimension that is different from the dimension of the horizontal dipole.

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