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Tunable helical resonator

  • US 5,210,510 A
  • Filed: 01/22/1991
  • Issued: 05/11/1993
  • Est. Priority Date: 02/07/1990
  • Status: Expired due to Fees
First Claim
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1. A tunable helical resonator comprising:

  • a helical coil having a first end, a second end and a lead coupled to the helical coil between the first and second end;

    a covering encircling the helical coil, so that the first end of said helical coil is connected to the cover and the second end being free and at a first distance from the cover; and

    an adjusting element formed in the cover which can be adjusted to vary a second distance between the adjusting element and the first end of the helical coil, the second distance between the adjusting element and the first end of the helical coil, the second distance being perpendicular to the longitudinal axis of the helical coil, wherein the adjusting element is a depression formed in the cover adjacent to the first end of the helical coil and protruding towards the first end.

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