| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problems: an impedance matching is hardly secured in conducting a substrate wiring of conventional filter components even though a fast IF signal is handled, for instance, an impedance mismatching occurs to generate a shift caused by the filter components in the substrate wiring actually conducted although the substrate wiring is dealt as an ideal impedance matching with the use of the filter components on a SIM. SOLUTION: An impedance matching filter comprises a GND connection part capable of easily providing the impedance matching on the filter component having an input terminal and an output terminal on the mounting board, and the mounting board mounts the impedance matching filter. COPYRIGHT: (C)2009,JPO&INPIT
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