This paper proposes a novel stacked dual-band differential rectenna. The proposed rectenna consists of two rectifying diodes and a dual-band array antenna with four 5.8-GHz patch antennas arrayed on a three-element 2.45-GHz array. The dual-band array antenna provides high gains of 12.2 and 13.8 dBi at 2.45 and 5.8 GHz, respectively. The matching circuits between the antenna elements and diodes are designed to provide the highest conversion efficiency at both 2.45- and 5.8-GHz band. The measured conversion efficiencies are 36.4% and 6.2% at 2.48 and 5.96 GHz under the low power density condition of 0.016 W/m², respectively. The proposed dual-band differential rectenna can easily realize large-scale rectenna arrays by simply connecting the ground conductors on the back.

中文翻译：

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在低功率密度环境中具有高转换效率的 2.45 和 5.8 GHz 双频带堆叠差分整流天线

本文提出了一种新颖的堆叠双频差分整流天线。建议的整流天线由两个整流二极管和一个双频阵列天线组成，其中四个 5.8-GHz 贴片天线排列在一个三元 2.45-GHz 阵列上。双频阵列天线在 2.45 和 5.8 GHz 下分别提供 12.2 和 13.8 dBi 的高增益。天线元件和二极管之间的匹配电路旨在在 2.45 和 5.8 GHz 频段提供最高的转换效率。^{在 0.016 W/m 2}的低功率密度条件下，在 2.48 和 5.96 GHz 处测得的转换效率分别为 36.4% 和 6.2% 。所提出的双频差分整流天线只需连接背面的接地导体即可轻松实现大规模整流天线阵列。