Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1997-09-24
1999-12-14
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333207, 333134, H01P 1205, H01P 512
Patent
active
060023090
ABSTRACT:
The invention provides a technique of adjusting the mutual capacitance of resonant through-holes in a dielectric filter while maintaining the shape of input/output electrodes constant without causing a change in the external capacitance. In one such dielectric filter, a plurality of resonant through-holes are formed in a dielectric block, each resonant through-hole including a large-diameter hole and a small-diameter hole, a step being formed at the boundary between the large-diameter hole and the small-diameter hole, the inner wall of each said resonant through-hole being covered with an inner conductor; an outer conductor formed on outer surfaces of said dielectric block except for an end surface in which ends of the respective large-diameter holes are located; and input/output electrodes which are formed on a side face such that said input/output electrodes are coupled with said large-diameter holes; wherein the center axes of said large-diameter holes are deviated from the center axes of the corresponding small-diameter holes, thereby increasing the mutual capacitance between the large-diameter holes.
REFERENCES:
patent: 4733208 (1988-03-01), Ishikawa et al.
patent: 5374906 (1994-12-01), Noguchi et al.
patent: 5537082 (1996-07-01), Tada et al.
patent: 5612654 (1997-03-01), Tsujiguchi et al.
patent: 5652555 (1997-07-01), Tada et al.
Nishijima Shohachi
Ogura Hiromi
Ham Seungsook
Murata Manufacturing Co. Ltd.
LandOfFree
Dielectric filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dielectric filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dielectric filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-867247