摘要
针对3mm角锥喇叭天线给出的场斑形状不规则、场分布面积大的问题,该试验借鉴透镜聚焦原理设计加工了聚四氟乙烯点聚焦透镜,在94GHz得到了直径为4.8mm的焦斑,以提高成像分辨率;通过对接收区的场进行二次聚焦,提高了接收天线的灵敏度。在此基础上,设计了一套基于Lab VIEW的全自动毫米波成像系统,并在仿真结果的指导下,用该系统对多个成像空间的毫米波场进行扫描,得到真实的空间场分布,并选取最小焦斑完成对常见物体的成像,该系统的分辨率优于2.5倍波长。
To solve the problem of the abnormal shape and large distribution field which generated by the 3mm horn antenna, according to the convex lens focusing theory, a polyterafluoroethylene(PTFE) focus lens was set up. A focal spot of radius 4.8mm was obtained at 94 GHz, and the imaging resolution can be improved. The strength of the received field by the horn antenna can also be focused to enhance the receiving sensitivity. An automatic millimeter wave imaging system based on Lab VIEW was developed. On the basis of simulation result, the imaging system scanned the millimeter wave field in multiple imaging spaces to obtain the actual field distribution. The minimum focal spot was selected to complete the image of the common objectives, and the resolution of the system is better than 2.5 times wavelength.
出处
《微波学报》
CSCD
北大核心
2014年第S1期624-626,共3页
Journal of Microwaves
基金
电子科技大学2013年大学生创新创业训练计划项目
中央高校基本科研业务费ZYGX2013J056
国家自然科学基金项目(61201011)
