摘要
频率选择表面(Frequency Select Surface,简称FSS)在实际运用与设计过程中,不可避免的遇到单元在曲面结构上的排布问题,这与仿真中无限大平面模型有所差异。本文以实际工程为背景,针对现实情况中出现的问题为重点,利用EastFDTD软件,以圆环形单元结构为基础,研究了直锥形天线罩下,单元排布对其电磁散射特性的影响。通过对比分析三种排布方式发现:消除缺陷后的优化排布对罩体电磁散射特性的影响有利,更好的实现了电磁波在工作频段的自由通透,非工作频段的高反射。
In the actual application and design process of frequency selective surface (FSS), it is inevitable to encounter the problem of arranging unit structure on the curved surface, which is different from the infinite plane model in simulation. In this paper, based on the actual engineering and focusing on the problems in the real situation, we study the influence of unit structure arrangement on the electromagnetic scattering characteristics of a straight conical radome based on the circular ring structure by using EastFDTD software. Through comparison and analysis of the three layout methods, it is found that the optimal layout after eliminating the defects is beneficial to the elec-tromagnetic scattering characteristics of the radome, which can better realize the free permeability of the electromagnetic wave in the working frequency band and the high reflection in the non-working frequency band.
出处
《应用物理》
CAS
2019年第12期491-498,共8页
Applied Physics
基金
长春理工大学校青年基金(XQNJJ-2017-03)
吉林省科技计划项目(20170312024, 20190201013)
国家自然科学基金(61405189)。
