In this study, a novel broadband rectenna system, capable of extracting energy from multiple RF sources is presented. The proposed topology employs a novel rectifying circuit comprising a two-port differential rectifier integrated with the hybrid coupler on a single board, which is the first structure of its kind possessing higher reliability. During measurement, the maximum efficiency of the proposed rectifying circuit is found to be at 4 dBm with the maximum DC voltage of 3.6 V. The proposed broadband RF energy harvesting circuit, comprising the newly designed rectifying circuit integrated with a broadband high gain Yagi antenna, can operate in the frequency range starting from 1.55 to 2.6 GHz. The broadband operation of the proposed rectenna is validated by performing measurement at three frequency points 1.81, 2.08 and 2.45 GHz using both single tone and two-tone methods in the anechoic chamber as well as in the lab environment. The proposed broadband rectenna configuration can potentially be used for extracting the RF energy simultaneously from multiple RF sources, while delivering the maximum power to a standard load.

中文翻译：

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使用差分整流器和混合耦合器的宽带集成整流天线

在这项研究中，提出了一种新颖的宽带整流天线系统，该系统能够从多个射频源中提取能量。提出的拓扑结构采用了一种新颖的整流电路，该电路包括一个与混合耦合器集成在一块板上的两端口差分整流器，这是同类产品中具有更高可靠性的第一种结构。在测量过程中，建议的整流电路的最大效率为在4 dBm时，最大DC电压为3.6V。拟议的宽带RF能量采集电路包括新设计的整流电路和集成的宽带高增益八木天线，可以在1.55至2.6 GHz的频率范围内工作。通过在电波暗室以及实验室环境中使用单音和双音方法在三个频率点1.81、2.08和2.45 GHz进行测量，可以验证所建议的整流天线的宽带操作。所建议的宽带整流天线配置可潜在地用于从多个RF源同时提取RF能量，同时将最大功率传递给标准负载。