LC filter with external electrodes only on a smaller layer

Details LC filter with external electrodes only on a smaller layer LC filter with external electrodes only on a smaller layer

1996-05-15

1998-07-07

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333175, H03H 701

Patent

active

057775338

ABSTRACT:
There is provided an LC filter in which the leakage of an electromagnetic field to the outside is suppressed. The LC filter 20 includes a laminated element 22. The laminated element 22 includes a multiplicity of dielectric layers 24a-24h. One end of a pattern electrode 34a serving as an inductor of an LC resonator is connected to a capacitor electrode 30a serving as a part of a capacitor of an LC resonator through a via hole formed in the dielectric layers 24d and 24e. The other end of the pattern electrode 34a is connected to one end of a pattern electrode 36a through a via hole formed in the dielectric layer 24f. The other end of the pattern electrode 36a is connected to a ground electrode 32a through a via hole formed in the dielectric layers 24e and 24f. Similarly, one end of a pattern electrode 34b serving as an inductor of another LC resonator is connected to a capacitor electrode 30b serving as a part of a capacitor of an LC resonator through a via hole formed in the dielectric layers 24d and 24e. The other end of the pattern electrode 34b is connected to one end of a pattern electrode 36b through a via hole formed in the dielectric layer 24f. The other end of the pattern electrode 36b is connected to a ground electrode 32b through a via hole formed in the dielectric layers 24e and 24f.

REFERENCES:
patent: 5029043 (1991-07-01), Kitahara et al.
patent: 5140497 (1992-08-01), Kato et al.
patent: 5251108 (1993-10-01), Doshita
patent: 5300903 (1994-04-01), Okamura et al.
patent: 5387888 (1995-02-01), Eda et al.
patent: 5404118 (1995-04-01), Okamura et al.
patent: 5572175 (1996-11-01), Tada et al.

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