Dielectric resonator device, dielectric filter, duplexer, and high-frequency communication

摘要

Electrodes ( 2 ) and ( 3 ) are formed on the front face ( 1 A) and the rear face ( 1 B) of a dielectric substrate ( 1 ). Fan-shaped apertures ( 4 A) and ( 4 B) forming a resonator ( 4 ) are formed in the electrodes ( 2 ) and ( 3 ) such that the fan-shaped aperture ( 4 A) opposes the fan-shaped aperture ( 4 B). Accordingly, two parameters, that is, the radius and the central angle, of the fan-shaped apertures ( 4 A) and ( 4 B) can be used to set the resonant frequency of the resonator ( 4 ), thus improving the flexibility in design of the resonator ( 4 ).