东南大学学报（英文版）2020，Vol.36Issue(4)：367-375,9.DOI:10.3969/j.issn.1003-7985.2020.04.001
采用改进型宽带集成巴伦和分布式寄生单元的带宽增强双极化天线
Bandwidth-enhanced dual-polarized antenna with improved broadband integrated balun and distributed parasitic element
摘要
Abstract
A bandwidth-enhanced dual-polarized antenna is proposed for 2/3/4/5G applications,which is composed of distributed parasitic elements(DPEs),a main radiator,two improved broadband integrated baluns and a reflector.First,a novel tooth-shape shorted slot line in the improved broadband integrated balun is analyzed to adjust the input impedance of the antenna.Then,DPEs with 2×2 circular plates loading over the main radiator are proposed to improve broadband impedance matching and radiation pattern.By utilizing impedance compensation of the tooth-shaped shorted slot line and the electromagnetic induction of the DPEs,the antenna achieves an enhanced impedance bandwidth and a stable radiation pattern.To verify these ideas,the bandwidth-enhanced dual-polarized antenna was fabricated and measured.The experimental results indicate that the proposed antenna achieves an operating bandwidth of 72.2％(1.69 to 3.60 GHz)with a return loss(RL)less than-15 dB and a port-to-port isolation(ISO)larger than 30 dB.The antenna obtains a half-power beamwidth(HPBW)within(66 ±5)° and a gain within(9.0 ±0.6)dBi in the 2/3/4G bands,and an HPBW within(61.5 ±2.5)° and a gain within(9.8 ±0.3)dBi in the 5G band.Across the whole band,the cross-polarization discrimination(XPD)and the front-to-back ratio are both larger than 20 dB.关键词
双极化天线/带宽增强/集成巴伦/分布寄生单元/阻抗匹配Key words
dual-polarized antenna/bandwidth enhancement/integrated balun/distributed parasitic elements/impedance matching分类
信息技术与安全科学引用本文复制引用
傅随道,曹振新,高迪,陈鹏,徐常志..采用改进型宽带集成巴伦和分布式寄生单元的带宽增强双极化天线[J].东南大学学报（英文版）,2020,36(4):367-375,9.基金项目
Foundation item:The National Natural Science Foundation of China(No.61471117). （No.61471117）
