星载L波段宽带高增益圆极化微带天线设计  

Design of L-band wideband high-gain circularly-polarized microstrip antenna for satellite communication system

作　　者：隋涛 邢斯瑞 孙伟 安向东 Sui Tao;Xing Sirui;Sun Wei;An Xiangdong(Chang Guang Satellite Technology Co.,Ltd.,Changchun 130000,China)

机构地区：[1]长光卫星技术有限公司,吉林长春130000

出　　处：《电子技术应用》2022年第1期138-141,151,共5页Application of Electronic Technique

摘　　要：针对卫星L波段通信转发系统的要求,设计了一种新型星载L波段宽带高增益圆极化微带天线。微带天线整体采用侧馈的馈电方式,采用H型缝隙耦合馈电方式以实现宽频带,采用威尔金森移相功分器实现两信号间相位差来满足圆极化,增加天线背部反射板和板间泡沫层以提高增益并稳固结构。通过电磁仿真软件分析可得:在中心频点1.45 GHz处增益为8.3 dBi,轴比为0.7 dB,增益大于7.5 dBi且回波损耗小于-10 dB时相对带宽为23.5%。天线加工实测结果与仿真结果基本一致,对L波段无线通信系统设计有一定指导意义。In response to the requirements of satellite L-band communication and forwarding systems,a novel type of satelliteborne L-band broadband high-gain circularly polarized microstrip antenna is designed.The microstrip antenna adopts a side-fed feeding method as a whole,adopts an H-shaped slot coupling feeding method to achieve a wide frequency band,and uses a Wilkinson phase shift power splitter to achieve the phase difference between the two signals to meet the circular polarization,and add the antenna back reflector and foam layer between the boards to increase gain and stabilize the structure.Through the analysis of electromagnetic simulation software,it can be obtained that the gain is 8.3 dBi at the center frequency point of 1.45 GHz,the axial ratio is 0.7 dB,the relative bandwidth is 23.5% when the gain is greater than 7.5 dBi and the return loss is less than-10 dB.The actual measurement results of the antenna processing are basically consistent with the simulation results,which have certain guiding significance for the design of the L-band wireless communication system.

关 键 词：缝隙耦合馈电 宽频带 高增益 圆极化 微带天线 

分 类 号：TN82[电子电信—信息与通信工程]