Wideband circular-polarized transmitarray for generating a high-purity vortex beam

作     者：Liangjie QIU Xiuping LI Zihang QI Wenyu ZHAO Yuhan HUANG Liangjie QIU;Xiuping LI;Zihang QI;Wenyu ZHAO;Yuhan HUANG

作者机构：State Key Laboratory of Information Photonics and Optical CommunicationsBeijing 100876China MOE Key Laboratory of Universal Wireless CommunicationsBeijing 100876China Beijing Key Laboratory of Work Safety Intelligent MonitoringBeijing 100876China School of Electronic EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China Beijing Institute of Spacecraft System EngineeringBeijing 100094China 

出 版 物：《Frontiers of Information Technology & Electronic Engineering》 (信息与电子工程前沿（英文版）)

年 卷 期：2023年第24卷第6期

页      面：927-934页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0835[工学-软件工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(No.61971051)。 

主　　题：antenna generating circular 

摘      要：In this correspondence,a wideband circular-polarized(CP)transmitarray(TA)in the Ka-band is presented for generating a high-purity vortex beam.The proposed element is composed of two identical combinations separated by an air layer.The subwavelength structure and double-resonance characteristics ensure the stable phase shift of the element within the 1-dB transmission bandwidth of 28.4%.A square aperture TA fed by a horn antenna is fabricated and measured.Owing to the honeycomb arrangement of elements,the mode purity of l​​=​​−1 is0.93 in a wide band from 28.5 to 38 GHz.The measured peak gain is 22.3 dBic,and the 3-dB axial ratio bandwidth is 27.6%.The performance of the proposed antenna demonstrates its potential for high-capacity wireless communication and high-quality radar imaging.