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This study presents a novel design of an ultra-thin absorber based on a wideband antenna array for the absorption of normal incident waves with single- or dual-polarization.
Hou, "Perfect metamaterial absorber with dual bands," Progress In Electromagnetics Research, Vol.
In this paper, we introduce an ultra thin and triple band microwave radar absorber for oblique incident applications.
From this figure, it can be observed that the reflectance and transmission of the absorber sharply decrease to a minimum at a frequency of 9.
When both dye and the UV absorber are applied to fabric, effects of their application sequence might worth examining; When UV absorber was applied prior to dyeing, UPF values of both twill and rib weave specimens increased.
By either increasing the concentration of the UV absorber or increasing the film thickness at the same concentration, you have increased the capability of the UV absorber to prevent UV light from getting to the substrate.
For convenience in analyses, the absorption coefficient is defined in terms of sound pressure reflection factor R of the absorber interface, namely
When the incident light deflection angle is less than 10[degrees], with the increase of the incident light deflection angle, the number of light received by absorber I decreased; and the number of light received by absorber IIincreased.
The strength parameters of the absorber components were adopted from the material database available in the LS-DYNA program.
The research team that developed the absorber includes Prof TieJun Zhang, from the Mechanical and Materials Engineering Department, postdoctoral researchers Dr Jin You Lu and Dr Aikifa Raza, and UAE National MSc students Afra Alketbi and Sumaya Noorulla, along with MIT team members Prof Gang Chen and Prof Nicholas X Fang, from the Mechanical Engineering Department.
Acoustic Absorbers and Diffusers: Theory, Design and Application, 3rd Edition