毫米波圆极化单脉冲阵列天线设计  

Design of a millimeter wave circularly polarized monopulse antenna array

作　　者：姚佳慧 吴思凡 李建星 田春明[1] 周海东 YAO Jiahui;WU Sifan;LI Jianxing;TIAN Chunming;ZHOU Haidong(School of Information and Communications Engineering,Xi’an Jiaotong University,Xi’an 710049,China;The 607 Research Institute of AVIC,Wuxi 214063,China)

机构地区：[1]西安交通大学信息与通信工程学院,西安710049 [2]中国航空工业集团有限公司第607研究所,无锡214063

出　　处：《空间电子技术》2025年第1期58-66,共9页Space Electronic Technology

基　　金：国家重点研发计划(编号:2021YFA0717500);国家自然科学基金(编号:62133013);陕西省创新能力支持计划(编号:2023KJXX-130)。

摘　　要：针对卫星通信系统对下行链路信号的高性能自跟踪接收的需求,研制了一种具有高增益、极低轴比特性的毫米波圆极化单脉冲阵列天线。文章提出一种新型顺序旋转比较器网络,同时集成经典二维单脉冲比较器网络与经典顺序旋转网络的相位关系,以实现极低轴比的和差波束辐射。此外,设计了具有低剖面特性的左旋圆极化子阵,每个子阵包括六十四个圆极化辐射单元与一个1分64的馈电网络。四个子阵正交排列,输入端口与顺序旋转比较器网络的输出端口内部相连接。仿真结果表明,所研制的16×16单脉冲阵列天线的工作带宽为27.5GHz~30GHz(回波损耗小于-15dB),和波束主极化增益达到33.2 dBic,带内轴比低于0.3 dB,和差波束零深小于-25 dB。所研制单脉冲阵列天线具有高增益、极高的圆极化纯度,特别适用于卫星通信。A millimeter wave circularly polarized monopulse antenna array featuring high gain and low axial ratio is proposed to meet the stringent requirements for self-tracking capability for downlink signal reception in the satellite communication system.A novel sequential rotation comparator network is devised,integrating the phase relationship between the traditional 2D monopulse comparator and the sequential rotation network to achieve low axial ratio radiation.Additionally,a low-profile left-handed circularly polarized subarray,comprising sixty-four radiators and a 1-to-64 feeder network,is designed.Four subarrays are arranged orthogonally and connected to the output ports of the sequential rotation comparator network.Simulation results demonstrate an operating bandwidth of 27.5 GHz~30 GHz(return loss>−15 dB)for the 16×16 monopulse antenna array,with a sum beam main polarization gain reaching 33.2 dBic.The in-band axial ratio is less than 0.3 dB,and the zero depth is less than−25 dB.The developed monopulse antenna array exhibits high gain and circular polarization purity,rendering it suitable for satellite communication applications.

关 键 词：轴比 圆极化 比较器 顺序旋转比较器网络 单脉冲阵列天线 

分 类 号：V443[航空宇航科学与技术—飞行器设计] TN82[电子电信—信息与通信工程]