Frequency-Switchable Metamaterial Absorber Injecting Eutectic Gallium-Indium EGaIn Liquid Metal AlloyReport as inadecuate




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School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 156-756, Korea





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Academic Editor: Vittorio M. N. Passaro

Abstract In this study, we demonstrated a new class of frequency-switchable metamaterial absorber in the X-band. Eutectic gallium-indium EGaIn, a liquid metal alloy, was injected in a microfluidic channel engraved on polymethyl methacrylate PMMA to achieve frequency switching. Numerical simulation and experimental results are presented for two cases: when the microfluidic channels are empty, and when they are filled with liquid metal. To evaluate the performance of the fabricated absorber prototype, it is tested with a rectangular waveguide. The resonant frequency was successfully switched from 10.96 GHz to 10.61 GHz after injecting liquid metal while maintaining absorptivity higher than 98%. View Full-Text

Keywords: metamaterial; resonance; microfluidics metamaterial; resonance; microfluidics





Author: Kenyu Ling, Hyung Ki Kim, Minyeong Yoo and Sungjoon Lim *

Source: http://mdpi.com/



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