Lightweight line filter and a method for constructing a lightwei

Details Lightweight line filter and a method for constructing a lightwei Lightweight line filter and a method for constructing a lightwei

1990-06-27

1991-10-29

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333 12, H03H 709

Patent

active

050619136

ABSTRACT:
A line filter comprising a plurality of coils, one or more X capacitors is disclosed. Optionally, the line filter may comprise one or more Y capacitors. A method for constructing such a line filter is also disclosed. In one embodiment, a second X capacitor has a value approximately equal to the value of a first X capacitor if a circuit constant LT0 is less than a total inductance LT.
In another embodiment, a first and third coils in combination exhibit a normal inductance of L.sub.1e, and a second and fourth coils in combination exhibit a normal mode inductance of L.sub.2e. L.sub.1e is determined at a point of intersection between a first function f1 and a second function f2, and a second capacitor has an equivalent capacitive value C.sub.X0 determined at a minimum of a third function, f3 (C.sub.X0), expressing L.sub.2e as a function of C.sub.X0.

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