Noise filter having multiple layers rolled into an elliptical sh

Details Noise filter having multiple layers rolled into an elliptical sh Noise filter having multiple layers rolled into an elliptical sh

1988-01-06

1989-07-11

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333185, 361313, 361303, H03H 701, H03H 709

Patent

active

048475750

ABSTRACT:
A distributed constant type noise filter and method of making same is provided. The filter includes a first foil conductor disposed to conduct electrical current with first and second lead wires connected near each end thereof, a second foil conductor disposed to be connected to ground potential having a third lead wire connected near one end thereof, and a plurality of dielectric sheets disposed between said first and second foil conductors. This sandwich is wound generally into a tubular form with said first and third lead wires being close to each other and shifted by approximately 1/4 to 3/4 of a turn. The second lead wire is arranged substantially in-line with said first and third lead wires after the tubular wound filter is compressed into substantially an elliptical shape. Alternatively, the sandwich is wound generally into a tubular form with said third lead wire being close to said first lead wire but separated therefrom by substantially 2.5% of the distance between said first and second lead wires.

REFERENCES:
patent: 2000441 (1935-05-01), Given
patent: 2260296 (1941-10-01), Christopher et al.
patent: 2884605 (1959-04-01), Dubilier
patent: 3365632 (1968-01-01), Grahame
patent: 4048593 (1977-09-01), Zillman
patent: 4563658 (1986-01-01), Ikeda

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