Folded single mode dielectric resonator filter with cross coupli

Details Folded single mode dielectric resonator filter with cross coupli Folded single mode dielectric resonator filter with cross coupli

1994-04-01

1997-03-04

Lee, Benny

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

3332191, 333230, H01P 1201

Patent

active

056083637

ABSTRACT:
The invention relates to a single mode multi-cavity microwave filter that includes a housing formed with a plurality of walls which define at least two rows of side-by-side dielectric loaded cavities, wherein sequential cavities are coupled to one another via slots formed in the walls therebetween and at least one pair of non-sequential adjacent cavities are coupled via a probe. The coupling via the slots is defined mathematically as positive coupling. The probe is selectively configurable to provide positive or negative coupling relative to the sign of the slot coupling. Further, at least one non-adjacent, non-sequential pair of cavities is coupled via a second probe that may be configured to provide either positive or negative coupling relative to the sign of the slot coupling. The filter housing supports a plurality of adjustable fins which extend into the slots, one fin to each slot, to selectively adjust the size of the slot.

REFERENCES:
patent: 3715690 (1973-02-01), Young et al.
patent: 3737816 (1973-06-01), Honicke
patent: 4291288 (1981-09-01), Young et al.
patent: 4453146 (1984-06-01), Fiedziuszko
patent: 4477785 (1984-10-01), Atia
patent: 4721933 (1988-01-01), Schwartz et al.
patent: 4821006 (1989-04-01), Ishikawa et al.
patent: 4890078 (1989-12-01), Radcliffe
patent: 5220300 (1993-06-01), Synder
Cameron, R. J.; "General Prototype Network-Synthesis Methods for Microwave Filters"; ESA Journal 1982, vol. 6; pp. 193-206.

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