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Dielectric resonator having two planar surfaces with respective adjustment plates parallel thereto

  • US 5,748,060 A
  • Filed: 06/04/1996
  • Issued: 05/05/1998
  • Est. Priority Date: 10/05/1994
  • Status: Expired due to Term
First Claim
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1. A dielectric resonator, comprising:

  • a dielectric resonator disc having two planar surfaces;

    a frequency controller comprising an adjustment mechanism and an electrically conductive adjustment plate, which is substantially parallel with one of said two planar surfaces of said dielectric resonator disc, and movable by means of said adjustment mechanism in a perpendicular direction with respect to said resonator disc for adjusting the resonance frequency by changing the distance between said conductive adjustment plate and said one of said two planar surfaces of said dielectric resonator disc;

    an electrically conductive casing for said dielectric resonator disc and said frequency controller;

    said frequency controller further comprising a dielectric adjustment plate, which is substantially parallel with the other of said two planar surfaces of said dielectric resonator disc and connected to said adjustment mechanism, so that said dielectric adjustment plate is movable in said perpendicular direction with respect to said other of said two planar surfaces, for changing the distance between said dielectric adjustment plate and said other of said two planar surfaces of said dielectric resonator disc simultaneously and to the same extent as the distance between said conductive adjustment plate and said one of said two planar surfaces, but in an opposite direction; and

    said conductive adjustment plate and said dielectric adjustment plate having frequency adjustment curves, which are substantially similar, but opposite with regard to the slope of adjustment, so that a combined slope of frequency adjustment of the frequency controller resulting from combining said frequency adjustment curves is substantially linear.

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