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Antenna system with reduced multipath reception

  • US 9,590,311 B2
  • Filed: 08/26/2014
  • Issued: 03/07/2017
  • Est. Priority Date: 08/26/2014
  • Status: Active Grant
First Claim
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1. An antenna system for operating with circularly-polarized signals, the antenna system having a vertical axis relative to which amplitude directional pattern is symmetrical and a plane perpendicular to the vertical axis such that the antenna system has a right-hand circular polarization upward from the perpendicular plane, the antenna system comprising:

  • a high impedance capacitive ground plane (HICGP);

    first and second antenna elements; and

    a combining network connected to the first and second antenna elements;

    wherein the first and second antenna elements are located above the HICGP and are separated along the vertical axis by a gap; and

    wherein the combining network subtracts signals received by the first element from signals received by the second element to produce an output signal representing the circularly-polarized signals received only from an upper hemisphere.

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