随机双线圆环高屏蔽效能金属网栅设计  

Design for Random Double⁃Line Ring Metal Mesh Structure with High Shielding Effectiveness

作　　者：郭翼 张轩雄[1] Guo Yi;Zhang Xuanxiong(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《中国激光》2024年第17期145-154,共10页Chinese Journal of Lasers

基　　金：国家自然科学基金(62276167)。

摘　　要：基于CST软件设计了一种透明的随机双线圆环金属网栅结构,该结构由双线金属网栅结构和圆环金属网栅结构通过一种特定的随机方法组合而成。与传统的方格金属网栅相比,随机双线圆环金属网栅在5~35 GHz范围内的平均电磁干扰屏蔽效能提升了1倍多,达到了29.232 dB,在35 GHz处甚至提升了约2倍。此外,该结构的归一化衍射能量分布比方格金属网栅结构更加均匀,最大高阶衍射能量比方格金属网栅结构显著降低,同时还具有较高的遮拦比。这些优异的特性表明该随机双线圆环金属网栅结构在高性能光学窗口上具有广阔的应用前景。Objective In our rapidly advancing electronic era,humans are becoming increasingly inundated with electronic devices,resulting in an unprecedentedly complex electromagnetic landscape.This has increased the demand for optical windows that can effectively shield against electromagnetic interference in fields such as aerospace,mobile communication,and optics.These optical windows must not only possess exceptional transmittance in the visible and near-infrared spectra,but also exhibit robust electromagnetic interference-shielding capabilities in the microwave range.The double-line ring metal mesh has attracted significant attention because of its superior transmittance in the visible and near-infrared spectra coupled with its formidable electromagnetic-shielding effectiveness in the microwave and radiowave ranges.Although grid metal meshes are widely used,they face inherent challenges in striking a balance between high optical transmittance and potent electromagnetic-shielding effectiveness.Additionally,periodic metal meshes can significantly affect the imaging quality of optical windows owing to the concentration of diffracted energy.To address these issues,we introduced an innovative random double-line ring metal mesh,which is based on a single-layer metal mesh design.Compared to a grid metal mesh,our proposed structure exhibits significantly improved electromagnetic interference-shielding effectiveness while ensuring a more uniform diffracted energy distribution.We believe that this novel structural design will significantly advance the practical application of metal meshes in the electromagnetic interference shielding of optical windows.Methods This study focused on the simulation analysis of a random double-line ring metal mesh.First,the shielding effectiveness of random double-line metal meshes with different degrees of randomness and gaps between the dual lines was simulated and analyzed.The shielding effectiveness of random double-line ring metal meshes with rings of different radii at different degrees of ra

关 键 词：光学器件 随机双线金属网栅结构 电磁干扰屏蔽 衍射能量分布 遮拦比 

分 类 号：TB31[一般工业技术—材料科学与工程]