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Frequency selective surface (FSS)

  • US 5,208,603 A
  • Filed: 06/15/1990
  • Issued: 05/04/1993
  • Est. Priority Date: 06/15/1990
  • Status: Expired due to Term
First Claim
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1. A frequency selective surface for transmitting a discrete frequency of incident electromagnetic energy, comprising:

  • slots in spaced conductive sheets aligned with one another and separated by a solid dielectric material, the slots being tuned at a discrete frequency to function as a high pass filter; and

    a patch element within the dielectric material tuned to the discrete frequency and functioning as a low pass filter for passing energy received by one slot to the other slot through the dielectric material.

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