MULTI-MODE CAVITY RESONATOR FOR WAVEGUIDE FILTER INCLUDING ELLIPTIC WAVEGUIDE SEGMENT

摘要

PROBLEM TO BE SOLVED: To provide the multi-mode cavity resonator that is resonated in 2 or 3 electromagnetic field modes, does not require a coupling screw and a tuning screw and is designed and manufactured easily and precisely by the design technology with the aid of computer. ;SOLUTION: The cavity resonator 1 includes at least one waveguide segment with an elliptic cross section and its axis has a prescribed tilt angle with respect to a polarized wave of an incident TE field. Thus, the dual mode cavity resonator is realized, in which two lateral fields TE having orthogonal polarized planes to each other are resonated. The triple mode cavity resonator is obtained by adding waveguide elements CR2, CR3 by which non-axial direction discontinuity is introduced and the longitudinal mode is resonated.;COPYRIGHT: (C)1997,JPO