In this letter, a compact broadband high-efficiency RF rectifier is presented for ambient RF energy harvesting (EH). A novel impedance matching network with an additional quarter-wavelength short-circuited stub was designed to achieve broadband impedance matching. After the branch was added, the parallel resonance point on track $S_{11}$ did not move, and the remaining points were compressed. The measurement results show that the proposed topology could realize a broadband high-efficiency rectifier for ambient RF EH, and the measured results were basically consistent with the simulation results. The measured efficiency is as high as 71.5% for an input power level of 8 dBm. A 1–2.4 GHz wide frequency band with an efficiency above 50% is achieved for an input power level of 5 dBm with a terminal load of 1.6 $\text{k}\Omega $ . Moreover, the circuit had wide dynamic input power characteristics, whose measured values remained above 50% with an input power of 3–14 dBm.

中文翻译：

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用于环境射频能量收集的宽带高效射频整流器

在这封信中，介绍了一种用于环境射频能量收集 (EH) 的紧凑型宽带高效射频整流器。设计了一种具有额外四分之一波长短路短截线的新型阻抗匹配网络，以实现宽带阻抗匹配。添加分支后，轨道上的并联谐振点 $S_{11}$ 不动，剩下的点都被压缩了。测量结果表明，所提出的拓扑结构可以实现对环境射频EH的宽带高效整流，测量结果与仿真结果基本一致。对于 8 dBm 的输入功率电平，测得的效率高达 71.5%。对于 5 dBm 的输入功率电平和 1.6 的终端负载，可实现 1–2.4 GHz 宽频带且效率高于 50% $\text{k}\Omega $ . 此外，该电路具有宽动态输入功率特性，其测量值保持在 50% 以上，输入功率为 3-14 dBm。