BALANCE FILTER, CHIP-TYPE BALANCE FILTER, AND POWER-LINE COMMUNICATION APPARATUS HAVING THEM

摘要

PROBLEM TO BE SOLVED: To provide a balance filter that allows downsizing.

SOLUTION: A balance filter includes: a balanced input terminal 1 including first and second input ports P1 and P2; a balanced output terminal 2 including first and second output ports P3 and P4; a first resonant circuit 31 connected between the first input port P1 and the first output port P3 and including a first coil element L21; and a second resonant circuit 41 connected between the second input port P2 and the second output port P4 and including a second coil element L22. The first coil element L21 and the second coil element L22 are disposed so that magnetic fluxes generated from respective coils form a closed magnetic path, and are coupled to each other by a mutual inductance M1.

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