Multiple coupled cavity waveguide bandpass filters

Details Multiple coupled cavity waveguide bandpass filters Multiple coupled cavity waveguide bandpass filters

1979-07-10

1983-08-02

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333208, H01P 1208, H01P 700

Patent

active

043968961

ABSTRACT:
The relative positions of the cavities in known single or dual mode multiple coupled cavity waveguide bandpass filters are rotated to achieve new filter structures in which the primary cavity couplings remain intact while the secondary couplings are shifted. The cavity rotation provides design flexibility since the input and output ports can now be taken from the same side of the filter structure. An additional advantage in dual mode filters is that the rotation permits the physical separation of input and output cavities, thereby providing increased isolation and eliminating spurious out-of-band coupling.

REFERENCES:
patent: 3737816 (1973-06-01), Honicke
patent: 3969692 (1976-07-01), Williams et al.
G. Pfitzenmaier-"An Exact Solution for a Six-Cavity Dual-Mode Elliptic Band Pass Filter", 1977 IEEE Microwave Theory and Techniques International Symposium, San Diego, Calif., Jun. 21-23, 1977; pp. 400-403.

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