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Small controlled parasitic antenna system and method for controlling same to optimally improve signal quality

  • US 20030030594A1
  • Filed: 07/29/2002
  • Published: 02/13/2003
  • Est. Priority Date: 07/30/2001
  • Status: Active Grant
First Claim
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1. A controlled parasitic antenna system having loaded parasitic elements within a radiating aperture of a small antenna element and having a largest dimension of about one-half wavelength at the lowest frequency of its operational band, said system comprising:

  • a. active control circuits embedded either in the aperture of the antenna element or behind the ground plane of said element, said active control circuits having impedance characteristics that can be varied by changing the values of electrical control signals applied to active components within the circuits;

    b. said parasitic elements being contained within the radiating aperture of the antenna element and being electrically connected to said active control circuits; and

    c. an active feedback control loop which regularly updates control settings of said active control circuits attached to said parasitic elements in the antenna aperture.

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