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High-frequency electric field coupler, communication system, and communication apparatus

  • US 8,008,985 B2
  • Filed: 09/29/2008
  • Issued: 08/30/2011
  • Est. Priority Date: 10/15/2007
  • Status: Expired due to Fees
First Claim
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1. A high-frequency electric field coupler used in a contactless communication system propagating high frequency signals in a wide band utilizing electric field coupling, comprising:

  • a coupling electrode; and

    a resonance unit operating to increase the amplitude of electrical charge accumulated at the coupling electrode at a predetermined resonance frequency,wherein;

    the coupling electrode is formed by a coiled linear conductor;

    the resonance unit is a short stub having a length equivalent to one half of the used wavelength and having a terminating end shorted to ground; and

    the coupling electrode formed by a coiled linear conductor is connected to a position of the short stub substantially at the center thereof and shorted to ground at an end thereof.

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