针对行波探测器阵列只能合成输出功率而不能同时提高工作带宽的现状, 基于m推演型滤波电路原理, 提出了一种新的L型阵列探测器, 即通过在光电二极管之间串联电容减少结电容对截止频率的影响, 再与两个电感串联形成单个阵列单元, 然后将单个阵列单元级联构成全新的L型滤波器电路结构。结果表明, L型探测器阵列能够对射频输出信号进行功率合成, 同时工作带宽提高至67 GHz, 相较于传统光电探测器, 工作带宽提高两倍。通过增加级联光电二极管的数量, 可以持续增大输出功率, 同时L型探测器阵列的推演方法可根据实际需求灵活设计出期望的光电探测器, 为未来大带宽、高功率的光电探测器设计提供理论基础。

For the status quo of traveling wave detector array which can synthesize output power but can’t improve work bandwidth, this paper proposes a new L-type array detector. Using a capacitance, a photodiode, and two inductance in series to form a single array unit, the L-type array detector has a cascade cell array structure. The results show that L-type detector can carry on power synthesis of the RF output signal, increaseworking bandwidth to 67 GHz at the same time; Compared with the traditional photoelectric detector, the work bandwidth is tripled. The reasoning method proposed in this paper can be adopted to flexible design of ideal photodiodes, providing a theoretical foundation for future study of photoelectric detectors.