| 摘要 |
PURPOSE: A transceiving switching device using PDs(Pin Diodes) is provided to switch transceiving signals of the same band by using low-priced PDs. CONSTITUTION: A transceiving selector(31) generates a switching signal according to a transmission time and a receiving time, and outputs the switching signal. An anode of the first PD(Pin Diode)(33) is connected with an output terminal of the transceiving selector(31) and an output terminal of a transmission data processor(32). The first PD(33) turns on/off an output of transmission data applied from the transmission data processor(32) on the basis of the switching signal. An input of a lambda/4 transformer(36) is connected with a cathode of the first PD(33) and an antenna(35). The lambda/4 transformer(36) inputs/intercepts the transmission data applied from the first PD(33), and performs a lambda/4 conversion for receiving data applied from the antenna(35) for outputting. An anode of the second PD(37) is combined with an output terminal of the lambda/4 transformer(36) and an input terminal of a receiving data processor(38) in parallel. A cathode of the second PD(37) is grounded. The second PD(37) applies the receiving data applied from the lambda/4 transformer(36) to the receiving data processor(38).
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