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Thermally-compensated microwave resonator utilizing current-null segmentation

  • US 4,736,173 A
  • Filed: 11/03/1986
  • Issued: 04/05/1988
  • Est. Priority Date: 06/30/1983
  • Status: Expired due to Term
First Claim
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1. A microwave resonator comprising:

  • a microwave cavity having longitudinal and transverse dimensions, transversely segmented into first and second longitudinal sections for permitting relative longitudinal movement between said first and second longitudinal sections;

    longitudinally spaced first and second plates secured to said cavity on the ends of said first and second longitudinal sections opposite the transverse segmentation;

    thermally responsive first compensation means secured to said first and second plates; and

    said first compensation means having an effective negative coefficient of thermal expansion to provide an inverse variation in the longitudinal spacing between said first and second plates;

    whereby resonant frequency changes of said resonator resulting from thermally induced variations in the transverse dimensions of said cavity are substantially offset by thermally induced inverse variations in the longitudinal spacing between said first and second plates.

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