摘要
为提高毫米波成像系统的空间分辨率,研究了毫米波成像准光路设计方法。讨论了聚焦元件的截断效应,研究了天线增益与束腰半径关系并利用高斯波束法设计了毫米波成像准光学系统,在系统参数确定的前提下对聚焦元件进行一体化设计。实验测量了准光路参数及透镜的聚焦效果,给出了实验结果并分析了透镜参数对实验误差的影响,证明了设计过程的有效性。设计过程步骤明确,设计结果与实测结果较为一致,对毫米波成像准光学系统的设计具有一定实用价值。
Methods of quasi-optics design were researched to improve the spatial resolution of the millimeter-wave imaging system. On the basis of characteristics comparison of different design methods and truncation effect considered, fundamental Gaussian beam method was used to design the quasi-optics. The relationship between waist radius and the gain of antenna was researched, and the lens was designed together as focusing element to meet the requirement of the system. Experimental results were given to illustrate the accuracy of the design method, and the reasons of the error were analyzed. The design process is easy to carry out while the result has good accuracy, so it is practical for designing the quasi-optics.
出处
《装备环境工程》
CAS
2009年第4期79-83,共5页
Equipment Environmental Engineering
关键词
准光学
毫米波
基模高斯波束法
介质透镜
quasi-optics
MMW
fundamental Gaussian beam method
dielectric lens
