基于毫米波近场成像的二维稀疏面阵结构  

Two-dimensional sparse array topology for millimeter-wave near-field imaging

作　　者：赵宇姣 成彬彬[1,2] 刘杰[1,2] 姜济群 喻洋 ZHAO Yujiao;CHENG Binbin;LIU Jie;JIANG Jiqun;YU Yang(Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621900,China;Microsystem and Terahertz Research Center,China Academy of Engineering Physics,Chengdu 610200,China 3.First Institute of Public Security,Beijing 100048,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900 [2]中国工程物理研究院微系统与太赫兹研究中心,四川成都610200 [3]公安部第一研究所,北京100048

出　　处：《系统工程与电子技术》2018年第9期1926-1930,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(61601426)资助课题

摘　　要：介绍了一种基于口字型布局的二维稀疏面阵结构,该结构在保证等效阵元均匀分布的前提下,有效减小了进入接收机的耦合信号的能量。在载频35GHz、带宽5GHz的系统条件下,该结构采用64个发射天线与64个接收天线,通过电动扫描的方式可以实现对指定区域的三维快速成像。点目标扩展函数的仿真结果显示该阵型结构在方位向、高度向和距离向的分辨率分别达到6mm、6mm和3cm;对复杂目标的三维成像实验进一步验证了该阵型结构具有良好的成像性能。A two-dimensional sparse array topology based on the quadrate spatial arrangement is presented.Under the precondition that effective aperture is uniformly distributed,the proposed array reduces the antenna coupling effectively.The proposed array topology is applied to a radar system with 35.5 GHz carrier frequency and 5 GHz bandwidth.This system contains 64 transmit antennas and 64 receive antennas,so it can generate an efficient three-dimensional reconstructed image by means of electric scanning.The simulation results of the point spread function indicate that the system achieves a high spatial resolution,which is 6 mm in lateral direction and 3 cm in range direction.The high-resolution imaging result of a distributed target shows the outstanding performance of the proposed array topology experimentally.

关 键 词：稀疏面阵 近场 三维成像 等效孔径 

分 类 号：TN95[电子电信—信号与信息处理]