| 摘要 |
PURPOSE: A duplexing apparatus of a transmission frequency converter is provided to utilize a transmission frequency converter, which is not used when only a reception diversity is used, as an extra path by using a switch. CONSTITUTION: An intermediate frequency converter(10) converts a signal to be transmitted into an IF(Intermediate Frequency) signal and outputs it to each sector. A transmission frequency converting unit(20) includes first to third transmission frequency converters(21-23) for up-converting the intermediate frequency signal of each sector. A power amplifier(30) amplifies power of signals outputted from the first to third transmission frequency converters(21-23) and outputs them to a transmission antenna. A first switching unit(50) having first to third RF switches(51-53) for selecting a path is implemented between the intermediate frequency converter(10) and the transmission frequency converting unit(20). A second switching unit(60) having first to third RF switches(61-63) for selecting a path is implemented between the transmission frequency converting unit(20) and the power amplifier(30).
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