【作者】 杜志侠； 章秀银； 薛泉；

【Author】 Zhi-Xia Du;Xiu Yin Zhang;Quan Xue;School of Electronic and Information Engineering, South China University of Technology;State Key Laboratory of Millimeter Waves (Partner Laboratory in HK);

【机构】 华南理工大学电子与信息学院； 毫米波国家重点实验室(香港城市大学伙伴实验室)；

【摘要】 本文提出了一种能拓宽输入功率范围,实现高效率整流的双路微波整流器。该整流器是基于一个分支线定向耦合器和两个子整流器。分支线耦合器的隔离端口直接接地。在该分支线耦合器的作用下,由于子整流器输入端不匹配而产生的反射波能被反射回子整流电路中重新利用,所以能在较大的输入功率范围内实现子整流器的输入端口"匹配"。因此,整流器的整流效率能被提高,并且能在更大的输入功率范围内实现高效率整流。此外,该设计的目的是为了更好的与天线进行匹配,降低整体的能量损失。为了验证该电路,本文设计并比较了工作在2.45 GHz的单路整流电路和提出的双路整流电路的性能,并展示出双路整流器的测试结果。更多还原

【Abstract】 This paper presents a two-way microwave rectifier with high efficiency over an extended range of input power. The proposed solution is based on a branch line coupler cascaded with two sub-rectifiers. The isolation port of the branch-line coupler is connected to ground directly. Due to the modified branch-line coupler, the reflected wave generated by mismatching from the sub-rectifiers would be reflected to the rectifying circuits and thus the input ports of the sub-rectifiers can be "matching" at various input power. Therefore, the RF-dc power conversion efficiency of the rectifier can be improved and the high-efficiency PCE range can be extended. The purpose of this design is to realize better matching with antenna, and reduce energy loss of the whole system. For validation, a single rectifier and the proposed two-way rectifier working at 2.45 GHz are designed and compared. The two-way rectifier is implemented and the result is presented.更多还原