Low insertion loss waveguide filter

Details Low insertion loss waveguide filter Low insertion loss waveguide filter

H - Electricity

03

H

333/68

H03H 7/01 (2006.01) H01P 1/208 (2006.01)

Patent

CA 1050127

ABSTRACT OF THE DISCLOSURE: A low insertion loss waveguide bandpass filter, having a high unloaded Q factor, is achieved using cascaded cavities of a length which is n times the half guide wavelength, and being the third index of a TE mode microwave to be transmitted and at least larger than one. Volume optimization for high Q performance is obtained by cascading cylindrical or square cavities of the same cross-sectional area whereas two different techniques are used to eliminate spurious responses in the stop-band. In the first technique, exclusively square or cylindrical cavities of different cross-sectional areas are cascaded whereas the second technique is based upon an alternate arrangement of square and cylindrical cavities. Also, even order filters as well as odd order filters having high Q performances are realized.

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