RESONATOR, FILTER, COMPOSITE FILTER, DUPLEXER AND COMMUNICATION UNIT

摘要

PROBLEM TO BE SOLVED: To provide a resonator, that partly adopts a structure of a semi- coaxial resonator or a coaxial resonator and can entirely be configured small in size, even when the number of resonator stages is increased. SOLUTION: A conductor rod 4, at least whose one end is continuous with a cavity, is provided in the inside of a cavity main body 1 and a dielectric core 3 is placed in the inside of the cavity body 1. Through such a configuration, the cavity and the conductor rod 4 configure a semi-coaxial resonator in a quasi-TEM mode and the cavity and a dielectric core 3 configure a resonator in a quasi-TM mode.