TM dual mode dielectric resonator apparatus and methods for adju

Details TM dual mode dielectric resonator apparatus and methods for adju TM dual mode dielectric resonator apparatus and methods for adju

1996-04-24

1998-01-20

Pascal, Robert

Wave transmission lines and networks

Resonators

Dielectric type

333235, H01P 710

Patent

active

057105308

ABSTRACT:
In a TM dual mode dielectric resonator apparatus including a cross-shaped TM dual mode dielectric resonator provided in an electrically conductive case, the cross-shaped dielectric resonator being comprised of first and second dielectric resonators, mode coupling means such as at least one groove or the like for coupling an operation of the first dielectric resonator with that of the second dielectric resonator is formed in the TM dual mode dielectric resonator. At least one first projection of a dielectric material for adjusting a coupling coefficient between the two dielectric resonators is formed on a portion of the crossing portion, wherein an adjustment amount of the coupling coefficient when the first projection is removed is previously determined. Further, respective at least one second and third projections of dielectric materials for adjusting resonance frequencies of the first and second dielectric resonators are formed respectively in a portion of the first dielectric resonator other than the crossing portion and in another portion of the second dielectric resonator other than the crossing portion.

REFERENCES:
patent: 4642591 (1987-02-01), Kobayashi
patent: 5078621 (1992-01-01), Nishikawa et al.
patent: 5336112 (1994-08-01), Michishita et al.
1992 IEEE MTT-S International Microwave Symposium Digest, vol. 3, Jun. 1-5, 1992, Albuquerque, US; IEEE, New York, 1992, pp. 1617-1620 "800 MHz High Power Duplexer Using TM Dual Mode Dielectric Resonators" by Y. Ishikawa et al., p. 1617, left col., lines 1-20, Fig. 1.
Patent Abstracts Of Japan, vol. 17, no 61 (E-1316) 5 Feb. 1993 & JP-A-04 267 604 (Hitachi Ferrite Ltd.) 24 Sep. 1992.
Patent Abstracts Of Japan, vol. 9, No. 280 (E-356) (2003) 8 Nov. 1985 & JP-A-60 123 106 (Nippon Denki K.K.) 1 Jul. 1985.

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