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Adjustable electronic filter and method of tuning same

  • US 4,800,348 A
  • Filed: 08/03/1987
  • Issued: 01/24/1989
  • Est. Priority Date: 08/03/1987
  • Status: Expired due to Term
First Claim
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1. A method for tuning a resonator, formed from a transmission line having a short-circuited end as a base within a dielectric block and including at least one through-hole therein, the dielectric block and the through-hole having a conformal conductive coating that covers essentially the entire surfaces thereof, the method comprising the step of:

  • removing a portion of the conductive coating near the base of the resonator so as to effect a change in inductance of said resonator.

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