Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1995-02-21
1997-12-09
Lee, Benny
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333206, H01P 1205
Patent
active
056964730
ABSTRACT:
A dielectric filter has a stepped resonator hole and straight resonator holes. A portion of a short-circuited end surface of the dielectric block, corresponding to a resonator formed in the stepped resonator hole, is removed, so that the short-circuited end surface has a stepped shape defined by a step surface. Thus the stepped resonator is shorter than the straight resonators. It is thus possible to provide a filter in which the respective resonant frequencies of the resonators are substantially the same, and inner conductor-free portions in the stepped hole and straight holes may be formed at substantially the same distances from an open-circuited end surface, while still obtaining firm coupling between the resonators.
Tada Hitoshi
Tsujiguchi Tatsuya
Lee Benny
Murata Manufacturing Co. Ltd.
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