微波食品加热
镜面反射
吸收(声学)
光学
材料科学
电磁辐射
联轴节(管道)
辐射
工作(物理)
平方(代数)
光电子学
物理
几何学
复合材料
量子力学
热力学
数学
作者
Joshua K. Hamilton,Ian R. Hooper,Christopher R. Lawrence
标识
DOI:10.7716/aem.v10i3.1803
摘要
In recent years there has been a large body of work investigating periodic metasurface microwave absorbers. However, surprisingly few investigations have focused on the absorption performance of similar non-periodic designs. In this work, the electromagnetic response of a large area (310 mm x 310 mm) microwave absorber that lacks a global periodicity is experimentally studied. The top metallic layer of the ultra-thin (0.3 mm) absorber is structured with rectangular patches given by a procedurally generated non-periodic pattern, known as the toothpick sequence. The specular reflectivity of both p-polarised and s-polarised incident radiation shows coupling to an additional low frequency mode when compared to a standard square patch periodic absorber. To further explore the coupling efficiency of such non-periodic absorbers, finite element models were used to investigate the influence of increasing sample size.
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