基于0.22THz高功率回旋管的步进频率雷达系统设计与仿真
投稿时间:2020-02-01  修订日期:2020-04-09  点此下载全文
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作者单位E-mail
张成鑫 电子科技大学电子科学与工程学院 zhangchengxin12@163.com 
鄢扬 电子科技大学电子科学与工程学院 yanyang@uestc.edu.cn 
傅文杰 电子科技大学电子科学与工程学院  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)(61401064)
中文摘要:基于0.22THz高功率回旋管振荡器设计了频率步进成像雷达,采用收发分开的双卡塞格伦天线,发射信号形式为频率步进脉冲信号,回旋管频率调节通过调整回旋管电子束电压或者超导磁场强度来实现。给出了成像雷达设计方案,对雷达最大作用距离和步进频率雷达系统高分辨一维距离像进行了分析,开展了ISAR成像仿真。理论计算和仿真结果表明,该雷达对于散射面积为0.01平方米的目标探测距离可达到1.982km,可分辨500m处间距2cm的点目标,可用于低高度小目标进行高精度探测,比如对可携带武器和危险物质的无人机进行高精度探测与目标识别。
中文关键词:太赫兹  步进频率雷达  ISAR  高分辨率  回旋管
 
Design and simulation of 0.22 THz stepped frequency radar system based on high power gyrotron
Abstract:A stepped frequency imaging radar which based on 0.22THz high power gyrotron oscillator was designed. The dual Cassegrain antenna with separate transceiver was used for transmitting stepped frequency pulse signal. Frequency adjustment of gyrotron oscillator was achieved by adjusting gytrotron electron beam voltage or superconducting magnet strength. The design scheme of imaging radar was given, the radar detect range and high resolution range profile of the stepped frequency radar system were analyzed, and ISAR imaging simulation was carried out. The results of theoretical calculation and simulation show that the radar could detect the target with scattering area of 0.01 square meter by 1.982km and distinguish the targets with a distance of 2cm at 500m。The radar can be used for investigations on target recognition of small objects such as UAV which can take concealed weapons and threat material.
keywords:terahertz, stepped  frequency radar, ISAR, high  resolution, gyrotron  oscillator
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