W波段三维近场安检成像系统（英文）

• 作 者: 程航 郑海涛 敬汉丹 李世勇 孙厚军
• 机 构: 北京理工大学信息与电子学院,
• 出 处: 红外与毫米波学报
• 发表日期: 2017年04期
• 关键词: 成像系统 波数域 成像算法 高分辨距离像 插值过程 完全补偿 预处理过程 段信号 波前 aperture

介绍了一套基于频率步进机制的W波段三维近场安检成像系统以及相应的成像算法.W波段信号可以穿透普通衣物,对人员携带的藏匿物品进行成像.成像算法通过在频率波数域进行插值处理可以完全补偿近场的波前曲面.文中阐述了频率波数域的插值过程以及实验数据的预处理过程.成像系统通过发射宽带信号得到高分辨距离像,通过提高工作频率得到高分辨方位像,方位向分辨率优于5 mm.成像实验结果表明该系统性能优于现有的Ka波段成像系统.

A set of three-dimensional W-band near-field security imaging system based on frequency stepping mechanism and its corresponding imaging algorithm are introduced.W-band signals can penetrate common clothes and image the concealed objects carried by personnel.An imaging algorithm is implemented in the frequency wave number domain The interpolation process can completely compensate the wave front surface in the near field.The interpolation process in frequency wave number domain and the pretreatment process of experimental data are described in this paper.The imaging system obtains the high resolution range image by transmitting the wideband signal and obtains the high resolution image by raising the working frequency , Azimuth resolution better than 5 mm.Experimental results show that the system performance is superior to the existing Ka-band imaging system.