Patent ID: 6940364

Claim:
A dielectric filter comprising: a dielectric block; at least four resonant through holes that are adjacent and parallel to each other provided in the dielectric block, each of the resonant through holes having a respective conductor formed on an inner surface thereof; an outer conductor formed on at least one outer surface of the dielectric block; a multipath slot formed within the dielectric block and having an inner conductor formed on an inner surface thereof, the inner conductor being separated from the outer conductor, the multipath slot being arranged near three adjacent resonant through holes among the at least four resonant through holes so as to generate a capacitance between a first area near an open end of each of the three adjacent resonant through holes and the inner conductor of the multipath slot; and a step formed on the dielectric block, the outer conductor extending within the step so as to generate a second capacitance between a second area near an open end of each of two resonant through holes among the at least four resonant through holes and the outer conductor within the step, the two resonant through holes including one of the three adjacent resonant through holes and a resonant through hole other than the three adjacent resonant through holes.