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Monolithic ceramic filter with bandstop function

  • US 4,823,098 A
  • Filed: 06/14/1988
  • Issued: 04/18/1989
  • Est. Priority Date: 06/14/1988
  • Status: Expired due to Term
First Claim
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1. A filter comprising:

  • dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes;

    input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means;

    output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and

    plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

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