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Differential-fed stacked patch antenna

  • US 7,084,815 B2
  • Filed: 03/22/2004
  • Issued: 08/01/2006
  • Est. Priority Date: 03/22/2004
  • Status: Active Grant
First Claim
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1. An antenna system comprising:

  • a grounded substrate;

    a first differential feed patch antenna that includes a first radiating system coupled to the grounded substrate and a first feed system having two feed points for providing a first differential feed signal, wherein the first radiating system resonates in response to an excitation by the first differential feed signal; and

    a second differential feed patch antenna being separated from the first differential feed patch antenna by a first distance, the second differential feed patch antenna including a second radiating system coupled to the grounded substrate and a second feed system having two feed points for providing a second differential feed signal, wherein the second radiating system resonates in response to an excitation by the second differential feed signal, wherein at least a portion of the second differential feed patch antenna serves as a ground plane for the first differential feed patch antenna, and wherein the first radiating system resonates at a higher frequency than the second radiating system.

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