Energy harvesting (EH) offers several benefits for integrating compact low-power wireless nodes into emerging microscale applications, such as the Internet of Things (IoT), wearable and implantable medical diagnosis, and so on. In this study, an optimum approach is developed to design an adaptive high-performance rectifier for EH wireless charging. The rectifier architecture is based on a simple voltage doubler configuration. The structure can be extended to achieve the desired output voltage level without altering the impedance matching network. The voltage doubler stage is duplicated symmetrically to increase the voltage to the desired levels. The matching circuit employs a simple L-network that consists of a series-inductive branch and a shunt LC branch. To verify the logical operation of this approach, two rectifier prototypes were developed, and the performance of each structure was separately evaluated and compared. The comparison shows good agreement between the simulation and measurement results of the two configurations. For example, the peak measured efficiency is 65% at an RF input power of 10 dBm, and the simulated value is 70% with a terminal load of 3.3 $\text{k}\Omega $ . The main objective of the proposed design is to enhance the output voltage without changing the matching network.

中文翻译：

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用于 900 MHz ISM 能量收集应用的可重构多级射频整流器拓扑

能量收集 (EH) 为将紧凑型低功耗无线节点集成到新兴的微型应用（例如物联网 (IoT)、可穿戴和植入式医疗诊断等）中提供了多种优势。在这项研究中，开发了一种最佳方法来设计用于 EH 无线充电的自适应高性能整流器。整流器架构基于简单的倍压器配置。可以扩展该结构以在不改变阻抗匹配网络的情况下实现所需的输出电压电平。倍压器级被对称地复制，以将电压增加到所需的水平。匹配电路采用由串联电感支路和并联 LC 支路组成的简单 L 网络。为了验证这种方法的逻辑操作，开发了两个整流器原型，并对每种结构的性能分别进行评估和比较。比较表明两种配置的模拟和测量结果之间具有良好的一致性。例如，RF 输入功率为 10 dBm 时测得的峰值效率为 65%，模拟值为 70%，终端负载为 3.3 $\text{k}\Omega $ 。建议设计的主要目标是在不改变匹配网络的情况下提高输出电压。