MULTI-MODE CAVITY FOR WAVEGUIDE FILTERS, INCLUDING AN ELLIPTICAL WAVEGUIDE SEGMENT

摘要

A multi-mode cavity for waveguide filters. Thecavity comprises at least one waveguide segment with anelliptical cross-section. The axes of the waveguidesegment are arranged at a given inclination angle withrespect to the polarization of the incident TE field toprovide a dual-mode cavity, with the ability to resonatetwo transverse fields (TE) with polarization planesorthogonal to each other. By adding an additionalwaveguide element to introduce a non-axial discontinuity,a triple-mode cavity is obtained, thereby allowing for anadditional longitudinal mode to resonate.