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Inverted-F antenna and radio communication system equipped therewith

  • US 6,255,994 B1
  • Filed: 09/28/1999
  • Issued: 07/03/2001
  • Est. Priority Date: 09/30/1998
  • Status: Expired due to Term
First Claim
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1. An inverted-F antenna comprising:

  • a radiating element for radiating or receiving an RF signal;

    a ground conductor arranged to be opposite to said radiating element with a specific gap;

    a feeding terminal electrically connected to said radiating element;

    a first grounding terminal electrically connected to said radiating element;

    at least one impedance element provided in a line connecting said first grounding terminal to said ground conductor; and

    a first switch for selectively inserting said at least one impedance element into said line;

    wherein a resonant frequency of said antenna is changed by operating said first switch.

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