“北京三号”C卫星超宽角低轴比数传相控阵天线设计与验证  

Design and verification of ultra-wide angle and low-axial ratio phased array antenna for BJ-3C Satellite

作　　者：江涛[1] 马超 赵笛[2] 石海然 智国平[1] 张杰[1] 薛欣[1] JIANG Tao;MA Chao;ZHAO Di;SHI Hairan;ZHI Guoping;ZHANG Jie;XUE Xin(Institute of Spacecraft System Engineering,Beijing 100094,China;DFH Satellite Co.,Ltd.,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]航天东方红卫星有限公司,北京100094

出　　处：《先进小卫星技术(中英文)》2025年第2期99-106,共8页Advanced Small Satellite Technology

摘　　要：针对“北京三号”C卫星敏捷机动、宽角域覆盖及大数据量下传的特点,采用双馈点高隔离度辐射单元结合特殊阵列旋转法,设计了一种适用于高速数传的超宽角、低轴比相控阵天线.相较于传统的机械转动天线,该相控阵天线具有波束扫描时无转动惯量、波束移动速度快、体积小和质量小等技术特点.地面试验及在轨飞行验证结果显示:该相控阵天线在±67.5°扫描范围内的轴比小于3dB,波束捷变时间小于1ms,覆盖区等效全向辐射功率(effective isotropic radiated power,EIRP)大于50dBm,可支持的数据速率达450Mbit/s.该天线在“北京三号”C卫星上取得了较好的效果,可以推广应用至其他卫星型号.Aiming at the BJ-3C Satellite′s characteristics of agility and maneuvering,wide-angle coverage and large data volume download,an ultra-wide angle and low-axial ratio phased array antenna for high speed data transmission was designed,using the dual-feed high-isolation radiating antenna units combined with a special array rotation method.Compared with traditional mechanical rotating antennas,the phased array antenna was characterized by no rotational inertia during beam scanning,high beam scanning speed,small volume and light weight.The results of the ground test and in-orbit flight verification show that the axial ratio of this phased array antenna is less than 3 dB within the±67.5°scanning range,the beam agility time is less than 1 ms,the effective isotropic radiated power(EIRP)in the coverage area is greater than 50 dBm,and the maximum supported data rate is up to 450 Mbit/s.With such a good performance on the BJ-3C Satellite,this antenna can be promoted and applied to other satellites.

关 键 词：超宽角 低轴比 波束捷变 相控阵 高速数传 

分 类 号：V443.4[航空宇航科学与技术—飞行器设计]