星载Ka频段相控阵天线可靠性设计及仿真分析  

Reliability design and simulation analysis of spaceborne Ka-band phased array antennas

作　　者：张世层 张冬 孙艳红[1] 崔子卿 杨丹[1] ZHANG Shiceng;ZHANG Dong;SUN Yanhong;CUI Ziqing;YANG Dan(The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《河北省科学院学报》2024年第6期40-44,共5页Journal of The Hebei Academy of Sciences

摘　　要：低轨卫星对于提升宽带通信、导航定位、军事安全等领域的能力具有重要意义,星载相控阵天线是其重要组成部分。本文针对星载Ka频段相控阵天线在轨可靠性需求和自身组成特性建立了可靠性模型,并对天线阵列选型和布局方式进行了分析,最后对星载Ka相控阵天线出现10%单元损坏的工作场景进行了性能仿真分析。仿真结果表明,三种损坏场景下相控阵接收天线性能损失均小于0.5 dB,发射天线性能损失均小于1 dB,且仍有较好的天线赋形能力,可通过重置幅度和相位加权值方式提升旁瓣抑制。相控阵天线可广泛应用于低成本、长寿命低轨卫星系统。Low Earth orbit satellites are of great significance in enhancing the capabilities of areas such as broadband communication,navigation and positioning,military security,and spaceborne phased array antennas are an important component of them.This article establishes a reliability model for the in orbit reliability requirements and self composition characteristics of spaceborne Ka-band phased array antennas.It also analyzes the selection and layout of antenna arrays,followed by performance simulation analysis of the spaceborne Ka phased array antennas under 10%of the units failure scenario.The simulation results show that the performance loss of the phased array receiving antenna is less than 0.5 dB under all three failure scenarios,the performance loss of the transmitting antenna is less than 1 dB,and sidelobe suppression can be improved by resetting amplitude and phase weighting values.Moreover,it still has good antenna shaping ability and can be widely used in low-cost,long-life low orbit satellite systems.

关 键 词：卫星通信 相控阵天线 旁瓣抑制 可靠性 

分 类 号：V443.4[航空宇航科学与技术—飞行器设计] TN821[电子电信—信息与通信工程]