| 摘要 |
PROBLEM TO BE SOLVED: To provide a distributed constant type filter capable of easily obtaining desired characteristic impedance while facilitating filter design. SOLUTION: This filter 1 having an input terminal 5, an output terminal 6 and a terminal 7 for ground is provided with a plane spiral coil 2, one end of which is connected to the input terminal 5 and the other end of which is connected to the output terminal 6, electrodes 4, 4 for ground where central holes 4a communicating with outer edge sides through notcher 4b are formed and which are arranged on both outer face sides of the spiral coil 2 through a dielectric 3 made of a nonmagnetic material and connected to the terminal 7 for ground, and a magnetic body 8 that is provided at at least one part of a magnetic path formed around the spiral coil 2. COPYRIGHT: (C)2004,JPO
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