| 摘要 |
PURPOSE:To prevent the interference of an electromagnetic wave between filters arranged adjacently from being caused by interposing a conductive shim between a cover of a metallic case and a metallic wall. CONSTITUTION:The conductive material made shim 7 is interposed between the metallic barrier 2 and the metallic plate 4 of a two-wave branching filter using an interdigital filter. The conductive shim 7 buries a gap formed between the metallic barrier 2 and the metallic plate 4 to contact them each other. Thus, the interference of the electromagnetic wave between the filters arranged adjacently caused by the leakage of the electromagnetic wave radiated from the gap is not caused and the branching filter with excellent isolation between the filters is obtained.
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