| 摘要 |
PROBLEM TO BE SOLVED: To provide a high frequency circuit for realizing the small body, especially a small height, and high performance of a complex high frequency part, by simplifying a circuit by reducing the number of parts (elements) included in the circuit, and provide the complex high frequency part and the communication system by using the high frequency circuit. SOLUTION: In the high frequency circuit, a first common terminal, a first input terminal, a first output terminal, and a first input/output terminal are provided. The high frequency circuit includes a switch unit for connecting one of the first input terminal, the first output terminal, and the first input/output terminal to the first common terminal, a first diplexer having a second common terminal, a second input terminal and a third input terminal, and a second diplexer having a third common terminal, a third output terminal and a fourth output terminal. The first input terminal is connected to the second common terminal, and the second output terminal is connected to the third common terminal.
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