Patent ID: 8427260

Claim:
A dual-band bandpass resonator, comprising: a dielectric substrate; a central conductor having a central axis aligned with an input/output direction formed on a surface of said dielectric substrate; a pair of grounding conductors that are formed on the surface of said dielectric substrate and disposed on opposite sides of said central conductor with a space interposed therebetween; a central conductor short-circuit part that is formed on the surface of said dielectric substrate and short-circuits said pair of grounding conductors to each other, and is connected to one end of said central conductor; and a pair of stub conductors that are formed on the surface of said dielectric substrate and disposed in the spaces on the opposite sides of said central conductor symmetrically with respect to the central axis of the central conductor, to extend at least partially parallel with the central conductor and are directly connected to said central conductor short-circuit part at one ends thereof.