A dual-frequency band low input power rectenna is proposed in this study. The rectenna is comprised of a co-planar waveguide (CPW) rectifier integrated with a rectangular split ring antenna loaded by a spiral strip line. A single diode series connection topology is used to miniaturise the losses at low input power. A spiral coil in addition to two short circuit stubs are used as a matching network for maximum power transfer between the antenna and the rectifying circuit. The proposed rectenna operates at low input power with relatively high measured RF-DC conversion efficiency up to at input power of at the first resonant frequency and at at the second operating frequency with a resistive load of . The measured rectenna sensitivity (the rectenna ability to receive low power with acceptable conversion efficiency) reaches up to with a conversion efficiency of and at and , respectively, and a DC output voltage of . The measured efficiency is over from to and from to at and , respectively.

中文翻译：

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双频带CPW整流天线，用于低输入功率能量收集应用

本研究提出了一种双频段低输入功率整流天线。整流天线由共平面波导（CPW）整流器组成，该整流器与由螺旋带状线加载的矩形裂环天线集成在一起。单二极管串联连接拓扑用于最小化低输入功率时的损耗。除两个短路端头外，螺旋线圈还用作匹配网络，以在天线和整流电路之间实现最大功率传输。拟议的整流天线在低输入功率下工作，相对较高的测得RF-DC转换效率高达 在输入功率 在第一个谐振频率 和 在 在第二工作频率 电阻负载为 。测得的整流天线灵敏度（整流天线以可接受的转换效率接收低功率的能力）达到 转换效率为 和 在 和 ，直流输出电压分别为 。测得的效率已结束 从 至 和从 至 在 和 ， 分别。