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Low profile, dual polarized/pattern antenna

  • US 6,864,856 B2
  • Filed: 06/10/2003
  • Issued: 03/08/2005
  • Est. Priority Date: 06/10/2002
  • Status: Expired due to Fees
First Claim
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1. A method of transmitting and/or receiving linearly polarized signals and circularly polarized signals within a frequency band, the method comprising:

  • providing a spiral antenna with a plurality of arms, where n equals the number of arms in said plurality of arms;

    exciting said plurality of arms whereby adjacent arms have a phase shift of 720/n degrees between them for transmission and/or reception of circularly polarized signals;

    supporting said spiral antenna at a distance above a ground plane; and

    exciting a pair of conductors with respect to said ground plane and in phase with each other for transmission and/or reception of linearly polarized signals.

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