Dielectric resonator and filter with low permittivity material

摘要

A resonator cavity (50) for supporting a plurality of resonant modes and filtering electromagnetic energy includes a cavity (51) and a resonator element (58) with a mounting flange (57). The cavity is defined by a top end wall (52), a bottom end wall (53) and a sidewall (54) and has a longitudinal axis (A) along its length is defined. The resonator element is positioned within the cavity along the longitudinal axis and includes a mounting flange. The resonator element is only in physical contact with the cavity through the mounting flange at a mounting location and where at least one resonant mode of the electromagnetic energy exhibits a local minima.