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针对未来光载无线通信所需的高功率、大带宽的光电探测器,提出了一种行波光电二极管级联阵列功率合成电路.先将行波光电二极管级联,再按照阵列式结构将多组级联的光电二极管组合起来,实现射频功率合成,以获得高功率、大带宽的射频信号.采用EDA工具,对该光电转换射频功率合成电路进行仿真模拟.仿真结果表明,该功率合成电路可以有效地将各光电二极管的射频输出信号进行功率合成,功率合成后的信号带宽显著增加,仿真结果与理论分析完全一致.此外,电路分析表明,增加该功率合成电路中的高阻微带线的特性阻抗可以有效提高其输出射频信号的带宽.
Aiming at the high-power and large-bandwidth photodetector needed for future optical wireless communication, a traveling-wave photodiode cascaded array power synthesis circuit is proposed. First, the traveling-wave photodiodes are cascaded, and then the array structure will be more The cascaded photodiodes are combined to realize RF power synthesis to obtain high power and large bandwidth radio frequency signals.The EDA tool is used to simulate the photoelectric conversion RF power synthesis circuit.The simulation results show that the power synthesis circuit can The output power of each photodiode is effectively combined and the bandwidth of the signal after power synthesis is significantly increased.The simulation results are in good agreement with the theoretical analysis.It also shows that increasing the high impedance microstrip line in the power synthesis circuit Characteristic impedance can effectively increase the bandwidth of the output RF signal.