Canonical dual mode filter
AssigneeCommunications Satellite Corporation
InventorsAli Ezz Eldin Atia, Albert Edward Williams
Life of this patent
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Abstract
A plural cavity waveguide filter comprising a plurality of cascaded waveguide cavities each resonating in first and second independent orthogonal modes is disclosed. The cavities may be either square and/or circular resonating in the TE.sub.101 or TE.sub.111 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.
Claims10
In a plural cavity waveguide filter comprising a plurality of cascaded waveguide cavities each resonating at its resonant frequency in a first and a second independent orthogonal mode, first coupling means in each of said cavities for intra cavity coupling of said first mode to said second mode, and second coupling means connecting successive ones of said cavities for inter cavity coupling like oriented modes in said successive cavities, the improvement wherein a reflective plate is provided in one end cavity and both input and output ports are provided in the other end cavity of said plurality of cascaded waveguide cavities.
Dependencies are inferred from the claim text.