BAND PASS FILTER FOR DIELECTRIC RESONATOR HAVING SYMMETRICALLY ATTENUATION POLAR

摘要

PURPOSE: A band pass filter for dielectric resonator is provided to have characterization by a symmetric attenuation polar related to an adjacent channel. CONSTITUTION: A metal body(40) and cover(46) form the first and the second metal cavity(41,42) mutually connected through a window(43). An input terminal inputs a microwave input signal into the first metal cavity(41). The first and the second dielectric resonator(50,60) form a band pass filter floating each dielectric within the first and second metal cavity(41,42). The first coupling part(31) connects to the input terminal so as to electromagnetically induce and couple the input signal with the first dielectric resonator(50). The second coupling part(36) electromagnetically induces and couples output frequency signal of the second metal cavity(42). A bypass device bypasses the first and the second dielectric resonator(50,60) so as to bypass some of the input signals by the coupling part(36). An output terminal outputs frequency signal of a band set and induced by the second coupling part(36).