CANONICAL DUAL MODE FILTER

摘要

A plural cavity waveguide filter comprising a plurality of cascaded waveguide cavities 11, 12, 1N each resonating in first and second independent orthogonal modes is disclosed. The cavities may be either square and/or circular resonating in the TE101 or TE111 modes, respectively. The filter makes it possible to realize the general class of coupled cavity bandpass transfer filter functions by providing that the input and output couplings to the filter be physically connected to the first physical cavity. A general set of canonical couplings can then be achieved within the structure.