Coaxial dielectric filter

Details Coaxial dielectric filter Coaxial dielectric filter

1999-02-22

2000-08-01

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333206, 333208, H01P 120

Patent

active

06097270&

ABSTRACT:
A coaxial dielectric filter comprising a straight cutoff waveguide, at least two coaxial dielectric resonators disposed coaxially or substantially coaxially and at an interval in the cutoff waveguide in its lengthwise direction, a rod-like input-side antenna whose leading end stands close, or inserted, to the inside of an input-side inner conductor of the coaxial dielectric resonator disposed on the input side, and a rod-like output-side antenna whose leading end stands close, or inserted, to the inside of an output-side inner conductor of the coaxial dielectric resonator disposed on the output side. This filter is characterized in that an adjacent-side end of at least one of coaxial dielectric resonators adjacent to each other forms a slope which is inclined with respect to the cutoff waveguide in its cross section perpendicular to the lengthwise direction.
In the adjustment of distance between the coaxial dielectric resonators adjacent to each other, the distance between the coaxial dielectric resonators on their adjacent sides can be adjusted simply not only when the coaxial dielectric resonator provided with the slope is moved in the lengthwise direction of the cutoff waveguide but also when it is moved in the width direction of the cutoff waveguide.

REFERENCES:
patent: 3939443 (1976-02-01), Biro et al.
patent: 4223287 (1980-09-01), Nishikawa et al.
patent: 5608415 (1997-03-01), Sugawara
JP 08 088504, Patent Abstracts of Japan, vol. 96, No. 8, Aug. 30, 1996.

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