A new multiband circular polarized rectenna is implemented as a radio frequency (RF) power harvesting system tuned for the quad bands of 1.8 GHz (GSM 1800), 2.4/5.8 GHz (WLAN), and 3.6 GHz (WiMAX). An innovative monopole antenna is made for the rectenna; consisting of an octagonal shaped microstrip patch, loaded with an I‐shaped rectangular slot and three L‐shaped stubs so that the antenna creates circular polarization at the quad bands. The second part of the rectenna is a multi‐frequency impedance matching network (IMN) set between the antenna and the rectifier circuit. The IMN includes some parallel shunt stepped impedance stubs (SIS), which provides eight‐band matching network and connected to the rectifier, functioning at the frequencies of 0.84, 1.29, 1.68, 3.08, 3.45, 4.31, 5.11, and 5.49 GHz. Simulation and experimental results verify that the system operates well and deliver proper DC power. For input power of 0 dBm, the peak RF‐to‐DC power conversion efficiencies are 62.69%, 63.28%, 46.94%, 30.23%, 45.69%, 16.42%, 8.13%, and 19.61% at the eight frequency bands, which is higher than the recently reported rectennas.

中文翻译：

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用于GSM，LTE，WLAN和WiMAX的射频能量收集整流天线

新的多频带圆极化整流天线已实现为射频（RF）功率收集系统，已针对1.8 GHz（GSM 1800），2.4 / 5.8 GHz（WLAN）和3.6 GHz（WiMAX）的四频带进行了调谐。创新的单极天线用于整流天线。由一个八边形微带贴片组成，上面装有一个I形矩形槽和三个L形短截线，以便天线在四频带上产生圆极化。整流天线的第二部分是在天线和整流电路之间设置的多频阻抗匹配网络（IMN）。IMN包括一些并联并联步进阻抗短截线（SIS），它提供八频段匹配网络并连接到整流器，工作频率为0.84、1.29、1.68、3.08、3.45、4.31、5.11和5.49 GHz。仿真和实验结果验证了该系统运行良好并提供了适当的直流电源。对于输入功率0 dBm时，八个频段的峰值RF到DC功率转换效率分别为62.69％，63.28％，46.94％，30.23％，45.69％，16.42％，8.13％和19.61％，这比最近的更高报告的整流天线。