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首页> 外文会议>2018 IEEE Indian Conference on Antennas and Propogation >Flexible Ultrathin Incident-Angle Insensitive Metamaterial Absorber for Curved Surfaces
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Flexible Ultrathin Incident-Angle Insensitive Metamaterial Absorber for Curved Surfaces

机译：弯曲表面的柔性超薄入射角不敏感超材料吸收器

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摘要

In this paper, a flexible ultrathin metamaterial absorber has been presented in X-band frequency range. Teflon substrate has been used as a dielectric, hence the proposed absorber offers flexibility and elastic nature. Simulated single-band absorptivity of 99.7% has been achieved at 10.28 GHz frequency with 188 MHz half power bandwidth. The 10-dB bandwidth of the proposed absorber is 60 MHz. Such narrow bandwidth is because of the use of very thin dielectric substrate. Proposed structure exhibits more than 80% absorptivity from 0° to 60° incident angles. Therefore, the designed conformal absorber exhibits higher absorption rates even for highly curved surfaces. The entire thickness of absorber is 0.17 mm (almost 1/170th of resonant wavelength). Permeability and permittivity plots are shown to prove the metamaterial property. Equivalent circuit and dielectric loss tangent plot of the designed absorber have also been shown for further analysis. The parameters present in the equivalent circuit have been extracted and then it is implemented in Advanced Design System (ADS). Finally, ADS results have been compared with High Frequency Structural Simulator (HFSS) results for reflection coefficient of the proposed absorber.
机译：在本文中，提出了一种在X频段频率范围内的柔性超薄超材料吸收器。聚四氟乙烯基材已被用作电介质，因此建议的吸收剂具有柔韧性和弹性。在10.28 GHz频率和188 MHz半功率带宽的情况下，已实现了99.7％的模拟单频带吸收率。建议的吸收器的10 dB带宽为60 MHz。如此窄的带宽是因为使用了非常薄的介电基板。拟议的结构在0°至60°入射角下具有超过80％的吸收率。因此，设计的保形吸收剂即使对于高度弯曲的表面也显示出更高的吸收率。吸收体的总厚度为0.17毫米（谐振波长的近1/170）。显示了渗透率和介电常数图以证明超材料的性质。还显示了设计吸收器的等效电路和介电损耗正切图，以供进一步分析。提取出等效电路中存在的参数，然后在高级设计系统（ADS）中实现。最后，将ADS结果与高频结构仿真器（HFSS）结果相比较，得出所提出的吸收体的反射系数。

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