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Antennas

  • US 8,680,450 B2
  • Filed: 06/11/2010
  • Issued: 03/25/2014
  • Est. Priority Date: 06/19/2009
  • Status: Active Grant
First Claim
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1. A Cassegrain antenna system comprising a primary reflector and a secondary reflector, the secondary reflector comprising:

  • a mirrored surface;

    a frequency selective surface associated with the mirrored surface;

    wherein the frequency selective surface is configured to reflect received radiation of a first radio frequency band and allow received radiation of a second frequency band to pass, the second frequency band including the electro-optic range of frequencies;

    and wherein the mirrored surface is configured to reflect the received radiation of the second frequency band;

    thereby the focal power for received radiation of the first radio frequency band is independent of the focal power for received radiation of the second frequency band.

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