This letter presents a high-efficiency rectifier based on a miniaturized branch-line hybrid coupler (MBLHC), which can be applied to wireless power harvesting (WPH) featuring a wide input power range. Originating from the connection to the MBLHC, two identical subrectifiers are used to achieve less sensitivity to the impedance mismatching, and thus the input power range is extended. For validation, theoretical analysis is carried out and a rectifier working at 5.8 GHz is configured out. The measured results show that the rectifier can achieve a conversion efficiency of more than 60% within the input power range from 2 to 17.5 dBm, and a maximum efficiency of 81% with a more compact size.

中文翻译：

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具有扩展输入功率范围的小型化高效整流器，适用于无线能量收集

这封信展示了一种基于小型化支线混合耦合器 (MBLHC) 的高效整流器，可应用于具有宽输入功率范围的无线功率收集 (WPH)。源自与 MBLHC 的连接，使用两个相同的子整流器来降低对阻抗失配的敏感性，从而扩展输入功率范围。为了验证，进行了理论分析并配置了工作在 5.8 GHz 的整流器。实测结果表明，该整流器在2~17.5 dBm的输入功率范围内可实现60%以上的转换效率，在更紧凑的尺寸下最高效率可达81%。