Surface mount filter with dielectric block through holes connect

Details Surface mount filter with dielectric block through holes connect Surface mount filter with dielectric block through holes connect

1998-09-15

2000-05-09

Lee, Benny

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333206, H01P 1202, H01P 1203

Patent

active

060609672

ABSTRACT:
Using a conventional surface mount filter, it is difficult to miniaturize as the filter characteristics, especially a harmonic rejection characteristic at a fundamental frequency is made favorable, and it is also difficult to regulate the filter characteristics after mounting. In the present invention, plural through holes coated with conductive films are formed on a dielectric block having a high dielectric constant and external electrodes are formed over almost all of the outer surfaces of the dielectric block, except one side surface thereof, while a conductive film is formed on almost all of one main surface of a low dielectric constant substrate, and plural striplines are formed on the other main surface thereof. The rear portions of the striplines and the conductive films in the through holes are electrically connected, while the front portions of the striplines are grounded through chip capacitors.

REFERENCES:
patent: 5304967 (1994-04-01), Hayashi
patent: 5345202 (1994-09-01), Kobayashi et al.
patent: 5374910 (1994-12-01), Yamagata
Japanese Publication No. 05-055810, Published Mar. 5, 1993, by Yamashita Kazuo et al., "Dielectric Filter", 2 pages.
Japanese Publication No. 05-283907, Published Oct. 29, 1993, by Imaizumi Tatsuya et al., "Strip Line Type Filter", 1 page.

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