TM mode dielectric resonator having coupling holes with voids

Details TM mode dielectric resonator having coupling holes with voids TM mode dielectric resonator having coupling holes with voids

1996-05-01

1997-06-24

Lee, Benny T.

Wave transmission lines and networks

Resonators

Dielectric type

333235, H01P 710

Patent

active

056420854

ABSTRACT:
A double TM mode dielectric resonator has a broadened adjustable range of a coupling coefficient between two resonators. A dielectric pillar has two intersecting dielectric members in a space surrounded by a conductor, for guiding electric fields in an even mode and an odd mode in a resonance condition; a pair of coupling adjusting holes formed at respective intersections of the dielectric members in a direction orthogonal to a plane defined by the dielectric members; and a pair of coupling adjusting dielectric rods disposed respectively in the coupling adjusting holes for movement into and out of the coupling adjusting holes. The resonator may further have a pair of voids, each provided in a respective coupling adjusting hole and extending therefrom in a direction substantially orthogonal to a direction of an electric field passing through the respective coupling adjusting hole in the resonance condition, and also orthogonal to a direction in which the respective coupling adjusting hole extends. Each of the voids blocks a first electric flux at a first portion in the respective coupling adjusting hole into which the respective coupling adjusting dielectric rod is not inserted, and concentrates a second electric flux at a second portion in the respective coupling adjusting hole into which the respective coupling adjusting dielectric rod is inserted, and thereby enhances a difference between the first electric flux density at the first portion, and a second electric flux density at the second portion.

REFERENCES:
patent: 4382238 (1983-05-01), Makimoto et al.
patent: 5049842 (1991-09-01), Ishikawa et al.
patent: 5146191 (1992-09-01), Mandai et al.
Ishikawa et al., "800 MHz High Power Duplexer Using TM Dual Mode Dielectric Resonators", IEEE MTT-S Digest, vol. III, Jun. 1-5, 1992, Albuqueque, N.M., USA; pp. 1617-1620.
Biebl, Erwin M., Anemogiannis Kimon, Robert Weigel, Peter Russer, "High Performance Mobile Communication Front-Ends in the GHZ Range Using Low Los Saw-Filters," IEEE 1991 Ultrasonic Symposium Proceedings, Dec. 8-11, 1991, vol. 1, pp. 55-58.
Patent Abstract of Japan, vol. 18, No. 340, Jun. 27, 1994 Publication No. JP 06 085506.

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