Optimize the Dielectric Slab of the Tunable Active Frequency Selective Surface Absorbing Material

2012 ◽  
Vol 534 ◽  
pp. 209-214 ◽  
Author(s):  
Qian Chen ◽  
Jian Jun Jiang ◽  
Xin Xin Xu ◽  
Biao Sun ◽  
Li Zhang ◽  
...  
Keyword(s):  
Frequency Selective Surface ◽  
Dielectric Slab ◽  
Optimum Thickness ◽  
Absorption Properties ◽  
Absorbing Material ◽  
New Type ◽  
Frequency Selective ◽  
Experimental Equation ◽  
Tunable Absorption ◽  
Selection Of

Active frequency selective surface (AFSS) absorber loaded with PIN diodes is a new type of structural absorber with tunable absorption properties. This absorber is similar to a sandwich, the surface is an AFSS, the middle is a dielectric slab, and the bottom is a metallic ground. In order to design and fabricate a thin and good performance absorber, the selection of dielectric slab is very important. In this paper, we detailed investigated the effects of the dielectric slab parameters (permittivity and thickness) to the absorption properties by experiments, and an experimental equation was proposed to provide a better description about their relationship. The measured results indicated there was an optimum thickness for the dielectric slab to produce the broadest bandwidth. The experimental equation was useful to optimize the design of the absorber.

scholarly journals Frequency selective surfaces on flexible thin plastic substrates

2019 ◽  
Vol 14 (2) ◽  
pp. 819
Author(s):  
N. A. F. M. Zainudin ◽  
S.N. Azemi ◽  
M.F. Jamlos ◽  
A.A. Al-Hadi ◽  
P.J. Soh
Keyword(s):  
Frequency Response ◽  
Flexible Substrate ◽  
Frequency Selective Surface ◽  
Plastic Substrate ◽  
Frequency Selective Surfaces ◽  
Plastic Substrates ◽  
Simulation Based ◽  
New Type ◽  
Frequency Selective ◽  
Thin Plastic

The capability of the flexible substrate of the frequency selective surface (FSS) to filter out particular frequency is discussed in this paper. A new type of FSS are applied using flexible thin plastic substrate to enhance the performance of the conventional FSS that lacks of flexibility and cannot be used in bending surface. A simulation based investigation shows that the diameter or length of the square has a significant effect on the band-stop selective characteristic of the FSS. The frequency response of the band-stop are at 2.45GHz that drop at -10dB.

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