Patent ID: 6304158
Filing Date: 2001-10-16
Classification: H01P

Abstract:
A dielectric filter, comprising:a plurality of resonance lines aligned in a dielectric block, in a dielectric substrate, or on a dielectric substrate;a plurality of input-output units respectively coupled to the plurality of resonance lines;at least one of the input-output units comprising a first external terminal capacitively coupled to one of the plurality of resonance lines, an external coupling line coupled to the one of the plurality of resonance lines to which the first external terminal is capacitively coupled, and a second external terminal extending from an end of the external coupling line;wherein the phase difference between the signals of the first and second external terminals viewed from the one of the plurality of resonance lines to which the first external terminal is capacitively coupled is substantially 180.degree., and the first and second external terminals are balance terminals.