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首页> 外文期刊>Science, Measurement & Technology, IET >Critical analysis of periodic fractal frequency selective surfaces coupled with synthesised ferrite-based dielectric substrates for optimal radar wave absorption
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Critical analysis of periodic fractal frequency selective surfaces coupled with synthesised ferrite-based dielectric substrates for optimal radar wave absorption

机译：周期性分形频率选择性表面与合成铁氧体基介电基片耦合以实现最佳雷达波吸收的临界分析

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摘要

It is a very challenging task to develop a good radar wave absorber with wide bandwidth that corresponds to reflection loss (RL) <=-10dB and lower coating thickness using radar absorbing material alone. However, this goal can be achieved with the application of advanced electromagnetic (EM) structures such as fractal frequency selective surfaces (FFSSs). The prior knowledge of the suitability of an FFSS for a particular nanocomposite material based on its dielectric constant (') is a very crucial factor. Therefore, a critical analysis has been carried out to choose the suitable FFSS geometries for a given set of nanocomposite materials having a ' ranging in between 1 and 20. The higher iterated Minkowski loop FFSS-impacted nanocomposite has been chosen for the experimental validation based on its good radar wave absorption capability. The Minkowski loop FFSS-impacted radar absorbing coating (RAC) has been fabricated, and its performance evaluation has been carried out. The measured RL of -17.9dB at 10.8GHz with a wide bandwidth of 2.9GHz (RL <=-10dB) has been noticed for 2.2mm thick RAC. The findings provide an effective way to develop thin and broadband absorber for various practical EM applications.
机译：单独使用雷达吸收材料来开发一种具有宽带宽，对应于反射损耗（RL）<=-10dB和较低涂层厚度的优良雷达波吸收器是一项艰巨的任务。但是，可以通过应用高级电磁（EM）结构（例如分形频率选择表面（FFSSs））来实现此目标。基于其介电常数（'）的FFSS对特定纳米复合材料的适用性的先验知识是非常关键的因素。因此，已经进行了严格的分析，以为给定的纳米复合材料组选择合适的FFSS几何形状，其材料的'范围在1到20之间。已选择较高迭代Minkowski环FFSS影响的纳米复合材料，基于其良好的雷达波吸收能力。制作了Minkowski环FFSS撞击雷达吸收涂层（RAC），并对其性能进行了评估。对于2.2mm厚的RAC，已经注意到在10.8GHz处测得的RL为-17.9dB，带宽为2.9GHz（RL <=-10dB）。这些发现为开发用于各种实际EM应用的薄型宽带吸收器提供了有效的方法。

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