| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized branching filter with a filter characteristic satisfying a low insertion loss and a high isolation characteristic at the same time. SOLUTION: The branching filter includes: a transmission filter 10 and a reception filter 11 which are connected to a common terminal 12; and a reactance circuit 18 connected to at least one of the transmission filter and the reception filter, and the reactance circuit 18 includes: an insulator board 21; and a plurality of inductors 22, 23 and a capacitor 24 of lumped constant type directly formed on a front side of the insulator board 21. COPYRIGHT: (C)2006,JPO&NCIPI
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