【摘要】 研究了一种基于毫米波的步进频连续波合成孔径雷达成像系统。基于算法研究,搭建了成像硬件及软件系统,实现信号扫描及回波信号的采集与处理。处理后的信号通过成像算法计算,获得目标物体的三维图像数据。实验测试了系统x、y、z方向的分辨率,测试结果表明系统x方向分辨率在8～9 mm,y方向分辨率为12 mm,z方向分辨率为40 mm左右。研究了系统的最佳成像距离,实验发现,当目标物体在距离收发天线5～16 cm范围时,均可对目标清晰成像且仅有很小的背景噪声。在人体安检的应用上,检测了五种常见面料的穿透效果。实验结果表明,在正常衣物厚度下,系统能有效地穿透面料并对隐藏物体清晰成像。更多还原

【Abstract】 In this paper,a stepped-frequency continuous wave synthetic aperture radar imaging system based on millimeter wave is studied. Based on the algorithm,the imaging hardware and software system are built to realize the signal scanning and the acquisition and processing of echo signal. The processed signal is calculated by the imaging algorithm,and the 3 D image data of the target is obtained. The results show that the resolution in x direction is 8～9 mm,the resolution in y direction is 12 mm,and the resolution in z direction is about 40 mm. The optimal imaging distance of the system is studied,and the results show that when the target is within the range of 5～16 cm from the transceiver,the target can be clearly imaged with only a small background noise. In the application of human security inspection,the penetration effect of five common fabrics is tested. The results show that the system can effectively penetrate the fabric and clearly image the hidden objects under normal clothing thickness.更多还原