Design of an Ultra-thin Tunable Metamaterial Absorber for Broadband Frequency Applications

Design of an Ultra-thin Tunable Metamaterial Absorber for Broadband Frequency Applications

A novel broadband metamaterial absorber (MMA) is presented in this paper. The absorber is a single layer structure based on the topology of a high impedance surface (HIS), but in which the conventional top layer is replaced by an active frequency selective surface (AFSS) loading with resistors and v...

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Bibliographic Details
Published in:2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) pp. 707 - 710
Main Authors: Qi, Kainan, Wang, Luchao, Kong, Shulan, Wang, Yan
Format: Conference Proceeding
Language:English
Published: IEEE 01-12-2019
Subjects:
Absorption
Bandwidth
Broadband communication
Metamaterials
Radar cross-sections
Resonant frequency
Varactors
Online Access:Get full text
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Summary:A novel broadband metamaterial absorber (MMA) is presented in this paper. The absorber is a single layer structure based on the topology of a high impedance surface (HIS), but in which the conventional top layer is replaced by an active frequency selective surface (AFSS) loading with resistors and varactor diodes. The absorbing resonant frequency of the MMA changes by adjusting the capacitance of varactor. Simulated results show that the absorption of the absorber covers a broadband of 2.35 GHz-11.45 GHz above 98% when the capacitance increases from 0.1 pF to 5 pF. At the same time, the total thickness of this absorber, 2 mm, is only λ/64 of the lower limit frequency.
DOI:10.1109/PIERS-Fall48861.2019.9021829