Dual mode band rejection filter

Details Dual mode band rejection filter Dual mode band rejection filter

1979-04-27

1980-08-19

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333208, H01P 706, H01P 116, H01D 120

Patent

active

042186668

ABSTRACT:
A dual mode band rejection filter for attenuating electromagnetic energy in a predetermined stop band having at least one resonant cavity with a pair of orthogonally related modes of propagation. The energy is propagated through a waveguide coupled to ports in the cavity. The waveguide has an input section coupled to a first cavity port, an intermediate section coupled between the first and second ports of the cavity and an output section coupled to the second port. The length of the intermediate section provides a predetermined phase shift between the first and second ports. The filter may include another dual mode resonant cavity coupled to the waveguide by additional waveguide sections.

REFERENCES:
patent: 3697898 (1972-10-01), Blachier

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