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Adjustable multi-band antenna

  • US 20050128152A1
  • Filed: 12/09/2004
  • Published: 06/16/2005
  • Est. Priority Date: 12/15/2003
  • Status: Active Grant
First Claim
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1. An adjustable multi-band antenna comprising a ground plane, a radiating plane with a dielectric support part, and an adjusting circuit having a parasitic element of the radiating plane and a controllable part connected to the parasitic element, by which controllable part a coupling between the parasitic element and the ground plane can be changed to displace an operation band of the antenna, said controllable part being a reactive matching circuit, circuit values of which have been arranged to be chosen from at least two alternatives to implement said change in the coupling, and each alternative set of the circuit values comprises values of at least two reactive elements to optimize an impedance matching and efficiency of the antenna.

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