High efficient C-band circularly polarized rectenna array with low-profile and lightweight  

作　　者：Zhou-Lin Fan Shuo Cao Xue-Xia Yang 

机构地区：[1]School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China

出　　处：《Space Solar Power and Wireless Transmission》2024年第3期152-157,共6页空间电力与无线传输(英文)

基　　金：supported by the National Natural Science Founda-tions of China under Grant 62171270.

摘　　要：A high efficient C-band circularly polarized rectenna array with low-profile and lightweight for wireless power transmission of space solar power stations is proposed and designed in this paper.The receiving antenna is an aperture-coupled microstrip quasi-square patch.The patch simultaneously excites two orthogonal modes of TM_(10)and TM_(01),which have a phase difference of 90◦by the perturbation method,so that the antenna operates in a circularly polarized state.The rectifier circuit is designed by microstrip lines in a parallel topology,and it consists of a stepped impedance matching network,a Schottky diode,two sector-branches as pass-through filter and a load.The input impedance of the rectifier and the characteristic impedance of the antenna feedline are both 50Ωfor being directly integrated into a rectenna.This rectenna has the advantages of low profile and scalability.The rectenna element,3×3 and 4×4 subarrays are simulated and tested with good agreement being obtained.The measured results show that the rectification efficiencies of the element and the two subarrays are 73.1%,72.7%,and 71.3%respectively at the center frequency of 5.76 GHz.Finally,a large rectenna array with 0.7 m aperture is designed to verify the scalability of the design.It will obtain 16.7 W of DC power at an efficiency of 65%.The rectenna has a profile of 1.61 mm and a surface density of less than 1.2 kg/m2.

关 键 词：Rectenna array Microwave power transmission Circular polarization Low-profile 

分 类 号：TN8[电子电信—信息与通信工程]