| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive filter circuit which has an excellent characteristic, and fine-adjustment of which is easy, and to provide a filter circuit for common reception employing the same. SOLUTION: In the common reception purpose filter circuit comprising the filter circuit configured to connect a resonance circuit formed on at least an insulation board to a transmission path formed on the insulation board via a capacitive reactance, the capacitive reactance is a jumper wire the one terminal of which is connected to the resonance circuit and the other terminal of which is arranged along the transmission path nearly in the same direction as the arranged direction of the transmission path, and capacitively coupled to the transmission path to form a freely variable very small capacitance. COPYRIGHT: (C)2006,JPO&NCIPI
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