摘要
合成孔径雷达作为一种全天候、全天时、高分辨率的现代微波成像雷达,具备可见光、红外等探测系统难以比拟的优点。其中星载SAR突破了地球曲率、气候昼夜、地缘政治和领空领海的限制,可实现对全球陆海目标高分辨率探测,已成为各国竞相研发的重点。在分辨率相同的情况下,Ka波段的合成孔径雷达(SAR)图像相比于低波段的SAR图像,能更好地反映目标的散射特性和轮廓细节特征,有效提高目标识别的准确性,检测正确率高于传统低波段SAR图像,目视可判读性更强。同时将调频连续波雷达成像(FMCW)技术应用到SAR系统中,有利于降低成本,缩短系统研制周期,实现系统小型化,降低卫星研制、发射的成本和周期,为后续SAR卫星提供新的轻小型化技术路线。
As an all-weather,all-day,and high-resolution microwave imaging radar system,synthetic aperture radar(SAR)has an advantage that other detection systems such as visible light,infrared ray are incomparable.Spacebased SAR has broken through the limitations of airspace and territorial waters,and can achieve high-resolution detection of global land and sea targets.It has become the focus of research and development in various countries.In the case of the same resolution,Ka-band SAR images can better reflect the target’s scattering characteristics and contour details than low-band SAR images,and effectively improve the accuracy of target recognition.The detection accuracy of Ka-band SAR images is higher than that of traditional low-band SAR images,and the visual interpretation is stronger.Moreover,the application of the frequency modulated continuous wave(FMCW)technology to the SAR system is beneficial to reduce the cost,shorten the system development cycle,and realize the system miniaturization.It can reduce the cost and cycle of satellite development and launch,and provides a new light and miniaturization technology route for subsequent SAR satellites.
作者
李金亮
王辉
陈翔
袁英男
郑世超
LI Jinliang;WANG Hui;CHEN Xiang;YUAN Yingnan;ZHENG Shichao(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2021年第S01期56-60,共5页
Aerospace Shanghai（Chinese&English）
基金
“上海市毫米波空天信息获取及应用技术重点实验室”项目资助
关键词
调频连续波合成孔径雷达成像
系统设计
毫米波SAR卫星
收发分置
frequency modulated continuous wave(FMCW)synthetic aperture radar(SAR)imaging
system design
millimeter wave SAR satellite
bistatic
作者简介
李金亮(1981—),男,硕士,主要研究方向为卫星总体设计;通信作者:王辉(1972—),女,博士,研究员,主要研究方向为星载毫米波SAR系统体制。
