A Dual Circularly Polarized Rectenna with Wide-Beam

Ningxin Mao, Deqiang Yang, Yue Tang
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引用次数: 2

Abstract

In this paper, a novel dual-circularly polarized rectenna, with a wide 3-dB axial-ratio beam-width, operating in the WIFI band(the central frequency is 2.4GHz) is proposed for harvesting the ambient radio frequency (RF) energy. Here, the rectenna with two $50-\mathbf{\Omega}$ microstrip-fed ports are designed to realize both right-hand and left-hand circular polarization. Good isolation is achieved by reasonably adjusting the radius of the annular slots and the length of the feed microstrip. A prototype is manufactured and tested. Measured results are in reasonably good agreement with the simulated ones, exhibiting a 3-dB AR beam-width as wide as 120° for both LHCP and RHCP. The measured polarization isolation is better than 20dB at 2.4GHz and reflection coefficient is better than 15 dB within the working band. In addition, the 3-dB ARBW is approximately 6.25% (2.32-2.48 GHz).
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宽波束双圆极化整流天线
本文提出了一种新的双圆极化整流天线,具有宽3db轴比波束宽度,工作在WIFI频段(中心频率为2.4GHz),用于收集环境射频(RF)能量。在这里,具有两个$50-\mathbf{\Omega}$微带馈电端口的整流天线被设计用于实现右手和左手圆极化。通过合理调整环形槽的半径和馈电微带的长度,实现了良好的隔离。一个原型被制造和测试。测量结果与模拟结果吻合较好,LHCP和RHCP的AR波束宽度均为3 db,为120°。实测偏振隔离在2.4GHz时优于20dB,工作频带内反射系数优于15db。此外,3db ARBW约为6.25% (2.32-2.48 GHz)。
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