An Omnidirectional Circularly Polarized Antenna Array

摘要：

　　An omnidirectional circularly polarized(CP)antenna array is proposed.The antenna array is composed of four identical CP antenna elements and one parallel strip-line feeding network.Each of CP antenna elements comprises a dipole and a zero-phase-shift(ZPS)line loop.The in-phase fed dipole and the ZPS line loop generate vertically and horizontally polarized omni-directional radiation,respectively.Furthermore,the vertically polarized dipole is positioned in the center of the horizontally polarized ZPS line loop.The size of the loop is designed such that a 90° phase difference is realized between the two orthogonal components because of the spatial difference and,therefore,generates CP omnidirectional radiation.A 1×4 antenna array at 900 MHz is prototyped and targeted to ultra-high frequency(UHF)radio frequency identification(RFID)applications.The measurement results show that the antenna array achieves a 10-dB return loss over a frequency range of 900-935 MHz and 3-dB axial-ratio(AR)from 890 to 930 MHz.At the frequency of 915 MHz,the measured maximum AR of 1.53 dB,maximum gain of 5.4 dBic,and an omnidirectionality of±1 dB are achieved.

关键词： Antenna array circularly polarized(CP)antenna omnidirectional antenna radio frequency identification(RFID) ultra-high frequency(UHF) zero-phase-shift(ZPS)loop

作者: Jin Shi Xu Wu Xianming Qing Zhi Ning Chen

作者单位: School of Electronics and Information,Nantong University,Nan Tong,Jiangsu 226019,China;State Key Lab Department of Electrical and Electronic Engineering,South University of Science and Technology of Ch Institute for Infocomm Research,A*STAR,138632 Singapore Institute for Infocomm Research,A*STAR,138632 Singapore;National University of Singapore,117583

会议类型: 国际会议

会议名称: 2021华为天线技术论坛

会议地点: 深圳

会议语种:英文

页码: 100-107

在线出版日期: 2021-12-01（万方平台首次上网日期，不代表论文的发表时间）