TM mode dielectric resonator having frequency adjusting holes wi

Details TM mode dielectric resonator having frequency adjusting holes wi TM mode dielectric resonator having frequency adjusting holes wi

1997-07-28

1998-05-19

Pascal, Robert

Wave transmission lines and networks

Resonators

Dielectric type

333235, H01P 710

Patent

active

057540837

ABSTRACT:
It is desirable to broaden a frequency adjusting range of a resonator, or an adjusting range of a coupling coefficient between two resonators, even in a downsized TM mode dielectric resonator by enhancing a ratio of frequency change relative to an amount of movement of a frequency adjusting dielectric rod, a frequency adjusting hole is formed in a direction orthogonal to a direction of an electric field which exists in a dielectric pillar at resonance, and a void is extended from the frequency adjusting hole in a direction that is orthogonal both to the electric field and also to the frequency adjusting hole. Thus the frequency adjusting range or the adjusting range of the coupling coefficient can be broadened even in a downsized TM mode dielectric resonator, even when the dielectric rod has a limited range of movement, without substantially enlarging the frequency adjusting dielectric rod.

REFERENCES:
patent: 4728913 (1988-03-01), Ishikawa et al.
patent: 5049842 (1991-09-01), Ishikawa et al.
Ishikawa et al.; "800Mhz High Power Duplexer Using TM Dual Mode Dielectric Resonators"; IEEE, MTT-S Digest vol. III; Jun. 1-5, 1992; Albuquerque, New Mexico; pp. 1617-1620.
European Search Report of European Patent Application No. EP-95-11 0284; Feb. 27, 1996.
Patent Abstracts of Japan, vol. 17 No. 115 (E-1330); Mar. 10, 1993; JP-A-04 296104 (Murata Manufacturing Co., Ltd.); Oct. 20, 1992.
Patent Abstracts of Japan, vol. 17 No. 570 (E-1448); Oct. 15, 1993; JP-A-05 167318; (Murata Manufacturing Co., Ltd.); Jul. 2, 1993.
European Search Report on the European Patent Application No. EP-95-11 0284; Nov., 1995.
Patent Abstracts of Japan, vol. 12 No. 158 (E-608); May 13, 1988; JP-A-62 271503 (Murata Manufacturing Co., Ltd.); Nov. 25, 1987.

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