COAXIAL RESONATOR AND DIELECTRIC FILTER, WIRELESS COMMUNICATIONS MODULE, AND WIRELESS COMMUNICATIONS DEVICE USING SAME

摘要

[Problem] To provide: a coaxial resonator with a large Q value in the first resonance mode and a large difference between the resonance frequency in the first resonance mode and the resonance frequency in the second resonance mode; and a dielectric filter, a wireless communications module, and a wireless communications device using same. [Solution] A coaxial resonator comprising: a first outer conductor (21) connected to a reference potential; a dielectric block (30) with a through-hole that extends from a first side surface (30c) to a second side surface (30d) that faces the first side surface (30c), and arranged such that a first main surface (30a) touches the top of the first outer conductor (21); inner conductors (41) arranged on the inside surfaces of the through-hole (31); and a second outer conductor (22) that is a box-shaped conductor with an opening that opens one surface of the cuboid, has internal dimensions capable of housing a second main surface (30b) of the dielectric block and the third and fourth side surfaces (30e, 30f) thereof with spaces between same and the second outer conductor, with the opening arranged facing the first outer conductor (21) side, and is connected to the reference potential.