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High impedance structures for multifrequency antennas and waveguides

  • US 20040066340A1
  • Filed: 09/26/2003
  • Published: 04/08/2004
  • Est. Priority Date: 08/23/2000
  • Status: Active Grant
First Claim
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1. A high impedance structure, comprising:

  • at least two layers, each said layer presenting a high impedance to the E field component of a different respective signal frequency, each said layer also being transparent to the E fields of lower frequency signals, and presenting a conductive surface to the E field of higher frequency signals; and

    the bottommost said layer presenting a high impedance to the E field of the lowest frequency of said signals, and each succeeding layer presenting a high impedance to the E field of successively higher frequencies.

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