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Microstrip patch antenna with embedded detector

  • US 5,394,159 A
  • Filed: 11/02/1993
  • Issued: 02/28/1995
  • Est. Priority Date: 11/02/1993
  • Status: Expired due to Term
First Claim
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1. In an antenna comprising a resonant conductive patch proximate to but insulated from a conductive ground plane:

  • a detector comprising a diode having a first electrode connected to the ground plane and having a second electrode connected to the patch; and

    signal conducting means for conducting signal to or from the patch,the antenna being intended for use at a particular wavelength;

    said signal conducting means having a length substantially greater than one-quarter of the particular wavelength; and

    a first capacitor having two terminals has a first terminal connected to the signal conducting means at a point one-quarter of the particular wavelength from the patch and a second terminal connected to the ground plane;

    whereby radio-frequency energy of wavelengths other than said particular wavelength is conducted to ground.

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