Filter device having a distributed-constant-line-type resonator

Details Filter device having a distributed-constant-line-type resonator Filter device having a distributed-constant-line-type resonator

1997-11-10

1999-11-16

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333204, H01P 1203

Patent

active

059865253

ABSTRACT:
A line width on the grounded side of distributed-constant-line-type resonators which form a distributed-constant-line-type filter is made wider than a line width on the open side. By increasing the line width on the grounded side, where a larger electric current flows, of a distributed-constant-line-type resonator, the line resistance of the distributed-constant line decreases, making it possible to reduce the loss of the distributed-constant-line-type resonator and further to reduce the insertion loss of the distributed-constant-line-type filter. Further, by decreasing the line width on the open side to less than the line width on the grounded side, an increase in the size of the filter because the line width on the grounded side is increased can be prevented.

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Patent Abstracts of Japan, vol. 96, No. 10, Oct. 31, 1996 & JP 08 167801 A (Murata Mfg Co Ltd), Jun. 25, 1996, abstract.
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European Search Report dated Feb. 19, 1998.

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