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Dielectric filter

  • US 5,319,328 A
  • Filed: 06/25/1992
  • Issued: 06/07/1994
  • Est. Priority Date: 06/25/1991
  • Status: Expired due to Fees
First Claim
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1. A filter comprising:

  • a body of dielectric material having upper and lower surfaces, the body having portions coated with a conductive material, and at least two holes extending from the upper surface towards the lower surface and being coated with the conductive material, whereby a respective transmission line resonator is formed for each hole; and

    means in at least one of the resonator holes for filtering frequencies higher than the desired operating frequency of the filter, the means for filtering frequencies higher than the desired operating frequency of the filter comprising an elongate conductive material, and a plurality of insulating disk-like members provided in space-apart relationship along the length of the elongate member.

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