Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1996-11-18
1998-11-24
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333203, H01P 1205
Patent
active
058413324
ABSTRACT:
A dielectric filter comprises transmission paths each of which is coupled to an associated input/output conductor provided in a dielectric ceramic block, and may be operated as capacitance means or inductance means, in which an intended center frequency can be obtained by suitably setting the lengths of the transmission paths without changing the length of each resonance conductor.
A method of adjusting the center frequency of a dielectric filter in which the center frequency of the dielectric filter is adjusted to a desired value by changing the length of each transmission path located on the top surface having a relatively wide area of the dielectric ceramic block, which may behave as capacitance means or inductance means, and the adjusting operation becomes easy and production costs can be reduced.
REFERENCES:
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4523162 (1985-06-01), Johnson
patent: 5321374 (1994-06-01), Uwano
patent: 5489882 (1996-02-01), Ueno
patent: 5528207 (1996-06-01), Ito
patent: 5629656 (1997-05-01), Tada et al.
Patent Abstracts of Japan, vol. 95, No. 9, Oct. 1995 & JP 07142908A (Testuya), Jun. 2, 1995.
Ham Seungsook
NGK Spark Plug Co. Ltd.
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