Dielectric filter comprising at least one coupling member coupled to two coupling modes of a resonator and a communication device using the same

摘要

A dielectric filter is formed by electrode non-formation parts (openings) disposed on opposite main surfaces of a dielectric plate so as to form a dielectric resonator, as well as two coupling members coupled to said dielectric resonator. A large amount of attenuation required for blocking a certain frequency is secured by generating an attenuation pole in the area of that frequency. The two coupling members may be constituted by probes or other structures. The two coupling members are non-parallel to each other, and one of the coupling members is coupled with at least two coupling modes of the resonator.