Injector device for a microwave filter unit using dielectric resonators, and a filter unit including the device

摘要

An injector device for microwave filter units made up of channel filters (1'', 1''') provided with cavities housing dielectric resonators. Each filter has an input cavity which receives a signal transmitted by a coaxial cable terminating at a connector (15'', 15''') mounted through a wall closing the cavity at an input end of the filter. The injector device of a filter acts electrically on a dielectric resonator accommodated in the input cavity via a probe (16) consisting of a L-shaped rod having a first portion connected to the core of the coaxial cable to extend it into the cavity and a second portion acting on a dielectric element (13) of the resonator via electrical coupling means. The invention also relates to filter units equipped with such injector devices.