Dual-band bandpass resonator and dual-band bandpass filter

摘要

A dual-band bandpass filter according to the present invention includes a plurality of dual-band bandpass resonators. The dual-band bandpass resonator includes a central conductor (11) having a central axis aligned with an input/output direction, a pair of grounding conductors (12), a central conductor short-circuit part (13) and a pair of stub conductors (14) that are formed on a surface of a dielectric substrate. The pair of grounding conductors are disposed on the opposite sides of the central conductor with a space interposed therebetween. The central conductor short-circuit part (13) short-circuits the pair of grounding conductors, and one end of the central conductor is connected to the central conductor short-circuit part.