基于桥接T型光电探测器阵列的功率合成研究与设计

针对行波探测器阵列(TWDA)仅提高了光电探测器 的输出功率而输出带宽未得到改善的问题,本文提出了一种区别 于TWDA的基于桥接T型光电探测器阵列新结构。本设计采用基于constant-R结构的桥接T型 结构代替TWDA中的传统 constant-K结构的方法,从而形成人工传输线结构。即耦合微带线提供串连电感和所需要 的互感 ,电容并联于其中一条微带 线上,再将单个光电二极管嵌入到此人工传输线上,构成单个阵列单元,再按照阵列式结构 将这些阵列单元有效级联起来构 成桥接T型光电探测器阵列。仿真结果表明,所提出的桥接T型光电探测器阵列能够使多个光 电探测器功率合成的同时提高 工作带宽,虽然桥接T型光电探测器阵列合成功率相比于传统TWDA合成功率有稍许减少,但 在工作带宽上却提高了2倍, 减少的稍许合成功率可以通过增加级联数目加以补偿。

Research and design of power synthesis based on bridge T-type photodetector arrays

This paper puts forward a new bridged T-type photodetector array which is diffe rent from traveling-wave detector array (TWDA).This design uses the bridge T-type structure based on constant-R network instead of the traditional consta nt-K network in TWDA which is formed by artificial transmission line structure.Firstly,the coupled microstrip line p rovides the series inductance and the required mutual inductance,capacitance in parallel to one of the microstrip lin e.After that,a single photodiode is embedded into the artificial transmission line,which constitutes a single array cell.Then according to the array structure,these single array cells are cascaded to form a bridge T-type photod etector array.The simulation results show that the proposed bridge T-type photoelectric detector array can make mult iple photoelectric detectors composite power and improve working bandwidth at the same time.Although the synt hetic power of the bridge T-type photoelectric detector array has slightly reduced compared with that of the tr aditional TWDA.But the working bandwidth is improved by 2.A reduc ed amount of synthetic power can be replenished by increasing the number of casc ades.