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

摘要

A multi-mode cavity for waveguide filters. The cavity comprises at least one waveguide segment with an elliptical cross-section. The axes of the waveguide segment are arranged at a given inclination angle with respect to the polarization of the incident TE field to provide a dual-mode cavity, with the ability to resonate two transverse fields (TE) with polarization planes orthogonal to each other. By adding an additional waveguide element to introduce a non-axial discontinuity, a triple-mode cavity is obtained, thereby allowing for an additional longitudinal mode to resonate.