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Adjustable multi-band antenna

  • US 20040207559A1
  • Filed: 03/22/2004
  • Published: 10/21/2004
  • Est. Priority Date: 04/15/2003
  • Status: Active Grant
First Claim
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1. An adjustable multi-band antenna having a ground plane, a radiating plane with a dielectric support part, a feed conductor and a short conductor of the antenna, and an adjusting circuit to displace operation band of the antenna, which adjusting circuit comprises a parasitic element and a switch as well as a terminal element directly connected to the ground plane, by which switch the parasitic element can be connected to the terminal element;

  • the adjusting circuit further comprising, for restricting the effect of controlling the switch to a single operation band of the antenna, a filter located electrically in series with the parasitic element and the switch.

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