【作者】 李岩； 张文静； 何应然；

【Author】 LI Yan;ZHANG Wenjing;HE Yingran;The 54th Research Institute of China Electronics Technology Corporation;

【机构】 中国电子科技集团公司第五十四研究所；

【摘要】 为了提高双焦点透镜的扫描性能,本文提出了一种综合法双焦点透镜设计。本文参考赋形透镜的设计思路,将能量守恒与双焦点透镜的逐点迭代法相结合,根据给定的口面场反求透镜轮廓,在满足透镜轴对称性的情况下调控双焦点透镜扫描波束的口面场幅度分布与相位分布,提高双焦点透镜的扫描性能。设计的综合法双焦点透镜在扫描角度±25°(8.3个波束宽度)时增益损失0.53 dB,扫描波束口面效率达到55.8%。在同样扫描角度下,综合法双焦点透镜相比原设计方法的双焦点透镜透镜增益损失减小0.41 dB。更多还原

【Abstract】 In order to improve the scanning performance of bifocal lens,a design of synthetic bifocal lens is proposed in this paper.The design method of shaped lens is used for reference,and the law of energy conservation is combined with point-by-point iteration method.The lens is designed by the synthesis method of deriving lens contour from the given aperture field distribution,in this way,the aperture amplitude distribution and phase distribution of the lens can be controlled under the precondition of ensuring the axial symmetry of the lens.Following this method,the gain loss of the designed synthetic bifocal lens is only 0.53 dB and the aperture efficiency up to 55.8% when scanning ±25°,which is 0.41 dB lower than that of the original design method bifocal lens.更多还原