| 摘要 |
A radio-frequency composite element 10 is formed by an element substrate carrying a high-efficiency amplifier 14, a transmission line 16 and an isolator 12, the amplifier 14 being made of a semiconductor element mounted on a multilayer substrate and enveloped by a cover, and the transmission line 16 furnished on the element substrate 18 connecting an output terminal of the high-efficiency amplifier with an input terminal of the isolator, so that the components make up an integrally formed composite element.
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