| 摘要 |
A high frequency unit (e.g., an RF signal selection switch) includes, as its external terminals, a terrestrial input terminal, a CATV input terminal, an RF output terminal, a selection signal terminal, a power supply terminal and a ground potential terminal. The external terminals are attached to a shielding case surrounding the peripheral edge of a wiring substrate. The shielding plate is disposed in contact with the rear face of the wiring substrate.
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