Dual-mode cavity for waveguide bandpass filter

Details Dual-mode cavity for waveguide bandpass filter Dual-mode cavity for waveguide bandpass filter

1997-02-11

1997-12-30

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333208, 333212, 333230, H01P 120

Patent

active

057035474

ABSTRACT:
Dual-mode cavity of waveguide bandpass filters, which allow the realization of narrow-band filters with very limited transition band and extremely low losses, without tuning or coupling screws or smooth edges. The dual mode cavity is composed of three coaxial sections of waveguide arranged in cascade and provided with irises, of which the two end sections are suited to support two modes with orthogonal polarizations and the intermediate section, consisting of a rectangular waveguide, has its side tilted with respect to the plane on which the irises lie. The whole filter composed of these cavities can be entirely designed by means of a computer and requires no tuning operation.

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Dual Mode Coupling By Square Corner Cut In Resonators And Filters, IEEE Transactions On Microwave Theory And Techniques, vol. 40, No. 12, Dec. 1992 Liang, Et Al (Members Of IEEE).
Narrow-Bandpass Waveguide Filters, IEEE Transactions On Microwave Theory And Techniques, vol. MTT-20, No. 4, Apr. 1972 ATIA, Et Al (Members Of IEEE).

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