一种旋转移相式高功率微波反射阵列天线  

A high-power microwave reflectarray antenna based onvariable rotation technique

作　　者：许亮 张强[1] 袁成卫[1] 刘金亮[1] 孙云飞 龚鸿州 刘东琪 Xu Liang;Zhang Qiang;Yuan Chengwei;Liu Jinliang;Sun Yunfei;Gong Hongzhou;Liu Dongqi(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学前沿交叉学科学院,长沙410073

出　　处：《强激光与粒子束》2024年第1期5-11,共7页High Power Laser and Particle Beams

摘　　要：利用旋转移相技术的几何相位调控方法,提出一种基于传输相位差概念的波束扫描高功率微波反射阵列天线。电磁仿真结果表明,所设计的三叉戟形反射阵列天线单元工作于9.5~10.5 GHz,在0~40°入射角度下具有360°范围内的线性相位调控能力,真空条件下的功率容量达到1.11 GW。采用该单元设计了半径为200 mm的圆形口径反射阵列天线,并使用全波仿真软件进行验证,利用口径相位分布的可重构特性,所设计的反射阵列天线可以实现±40°范围内的波束扫描。在10 GHz时,波束扫描过程中的增益下降小于1.7 dB,最大增益达到31.1 dBi,对应口径效率为73.42%,最低口径效率超过50%,副瓣电平和轴比始终低于-18.7 dB和1.6 dB。In this paper,utilizing the geometrical phase shifting method of Variable Rotation Technique(VRT),we propose a beam scanning high-power microwave reflectarray antenna based on the concept of transmission phasedifference.Electromagnetic simulation results show that the designed trident-shaped reflectarray antenna elementoperates at 9.5−10.5 GHz,has a linear phase shift capability within 360°at 0−40°incidence angle,and has a powerhandling capacity of 1.11 GW under vacuum conditions.A circular-shaped aperture reflectarray antenna with a radiusof 200 mm is designed using the proposed element,and verified by full-wave simulation.Through the reconfigurationof the aperture phase distribution,the designed reflectarray antenna can realize the beam scanning in the range of±40°.At 10 GHz,the maximum gain loss during beam scanning is less than 1.63 dB,the maximum gain reaches 31.1 dBi,the corresponding aperture efficiency is 73.42%,while the minimum aperture efficiency is more than 50%.Thesidelobe level and axial ratio are always lower than−18.7 dB and 1.6 dB,respectively.

关 键 词：旋转移相技术 波束扫描 反射阵列天线 高功率微波 功率容量 

分 类 号：TN82[电子电信—信息与通信工程]