【摘要】 利用几何光学法设计优化了一种新型的用于紧缩场测试的介质透镜。以发射点到接收点的光程差为目标函数 ,对透镜的照亮面轮廓进行优化 ,得出其函数表达式 ,使得在± 2 0°扫描角范围内 ,被测系统接收到的为近似的平面波。最后将有透镜校正与没加透镜的情况进行计算比较 ,可以看出校正效果明显。更多还原

【Abstract】 A new type of dielectric lens used for the compact-field test is designed in this paper.The main formulation for such a design is based upon the geometrical optics method.The light path-differences are chosen as the objective function to implement the optimization.After the contour of lit side of the lens is theoretically optimized,the mathematical function expression of the contour is obtained.The transmitted electromagnetic waves across the lens are proven approximately plane waves within ±20° scanning angle.Finally,the light path-differences between the one which is with lens and the one which is without lens are compared,which demonstrates that the existence of such a lens is very effective for making the propagated wave much closer to a plane wave.更多还原