Filter apparatus

Details Filter apparatus Filter apparatus

1990-03-28

1991-07-30

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333246, 361400, 361414, 361424, H03H 700, H05K 111

Patent

active

050363018

ABSTRACT:
A filter apparatus comprised of a multi-layer printed circuit board has a shielded filter with input and output terminals protruding from the circuit board, when the filter is mounted on the printed circuit board. Two insulating substrates form the printed circuit board, and a connective conductive pattern is formed on an inner surface of one of the substrates that faces the other substrate. Conductive layers are formed on respective outer surfaces of the substrate opposing the connection conductive pattern, wherein at least one of the input and output terminals of the filter is connected to the connective conductive pattern and the conductive layers are grounded, thereby shielding the connective conductive pattern.

REFERENCES:
patent: 3876822 (1975-04-01), Davy et al.
patent: 3991347 (1976-11-01), Hollyday
patent: 4242720 (1980-12-01), Moore
patent: 4904968 (1990-02-01), Theus
patent: 4945323 (1990-07-01), Gerstenberg et al.

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