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High frequency filter

  • US 20070194865A1
  • Filed: 03/03/2005
  • Published: 08/23/2007
  • Est. Priority Date: 03/04/2004
  • Status: Active Grant
First Claim
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1. A high frequency filter of coaxial construction, including at least one resonator comprising:

  • an electrically conductive internal conductor configured as an internal conductive tube;

    an electrically conductive external conductors;

    an electrically conductive base which electrically interconnects the internal conductor and the external conductors;

    a cover covering at least the high frequency filter with respect to the base and having an inner side and outer side, the inner side pointing toward a free end of the internal conductive tube;

    a dielectric layer having a relative dielectric constant greater than 2 arranged between the outer side of the cover and the free end of the internal conductive tube;

    the radial extent of the dielectric layers substantially covering the cross section of the internal conductive tube at the free ends thereof;

    wherein the dielectric layer is arranged on or fastened to the cover.

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