Patent ID: 6512429
Filing Date: 2003-01-28
Classification: H01P

Abstract:
A dielectric filter comprising:a dielectric plate; electrodes having openings of approximately a same shape opposite to each other, on opposite sides of the dielectric plate, provided on both sides of said dielectric plate; and areas of said dielectric plate between said openings constituting respective resonators, wherein a plurality of stages of resonators in which adjacent resonators are successively coupled with each other, are provided on said dielectric plate, and a coupling line for polarization which directly couples two resonators which are separated from each other by one or more other stages among said plurality of said resonators to jump-couple both resonators with each other, is provided on a substrate which is spaced away from said dielectric plate; further comprising: a pair of lines for signal input/output disposed on a substrate which is spaced away from said dielectric plate, said pair of input/output lines being coupled respectively with two corresponding resonators of said plurality of said dielectric resonators to input/output a signal; wherein said coupling line and said input/output lines are provided on different respective substrates which are spaced away from said dielectric plate in opposite directions.