基于5 μm厚向列相液晶的高效圆极化相控阵系统的设计、校准和实验验证

作     者：Xin Yu Wu Fengshuo Wan Hongyuan Feng Shichao Jin Chong Guo Yu Wei Dunge Liu Yuqian Yang Longzhu Cai Zhi Hao Jiang Wei Hong Xin Yu Wu;Fengshuo Wan;Hongyuan Feng;Shichao Jin;Chong Guo;Yu Wei;Dunge Liu;Yuqian Yang;Longzhu Cai;Zhi Hao Jiang;Wei Hong

作者机构：State Key Laboratory of Millimeter WavesSchool ofInformation Science and Engineering Southeast UniversityNanjing 210096China State Key Laboratory of Space-Ground Integrated Information TechnologyBeijing Institute of Satellite Information Engineering Beijing 100095China Research Institute of Millimeter-Wave and Terahertz Technology(RIMMATT)Nanjing 211111China 

出 版 物：《Engineering》 (工程（英文）)

年 卷 期：2024年第32卷第1期

页      面：69-81页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported in part by the National Natural Science Foundation of China(NSFC 62122019 and 62293492) the National Key Research and Development Program of China(2019YFB2204704) the Fundamental Research Funds for the Central Universities the Zhishan Scholar Program of Southeast University(2242022R40038) 

主　　题：Circularly polarized Liquid crystal Liquid-crystal based phased array(LCPA) Phase shifter Over-the-air(OTA)calibration 

摘      要：This paper presents a systematic investigation and demonstration of a K-band circularly polarized liquidcrystal-based phased array(LCPA),including the design,over-the-air(OTA)in-array calibration,and experimental *** LCPA contains 16 phase-shifting radiating channels,each consisting of a circularly polarized stacked patch antenna and a liquid-crystal-based phase shifter(LCPS)based on a loaded differential line *** to its slow-wave properties,the LCPS exhibits a maximum phase-shifting range of more than 360°with a figure of merit of 78.3(°)·dB^(-1)based on a liquid crystal layer with a thickness of only 5μ***,an automatic OTA calibration based on a state ergodic method is proposed,which enables the extraction of the phase-voltage curve of every individual LCPA *** proposed LCPA is manufactured and characterized with a total profile of only 1.76 mm,experimentally demonstrating a scanned circularly polarized beam from-40°to+40°with a measured peak gain of 12.5 dBic and a scanning loss of less than 2.5 *** bandwidth of the LCPA,which satisfies the require-ments of port reflection(|S_(11)|)-15 dB,an axial ratio(AR)3 dB,beam squinting3°,and a gain variation2.2 dB,spans from 25.5 to 26.0 *** total efficiency is about 34%,which represents a new state of the *** use of the demonstrated low-profile LCPA to support circularly polarized scanning beams,along with the systematic design and calibration methodology,holds potential promise for a variety of millimeter-wave applications.