期刊
SENSORS
卷 15, 期 11, 页码 28154-28165出版社
MDPI
DOI: 10.3390/s151128154
关键词
metamaterial; resonance; microfluidics
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2014R1A2A1A11050010]
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%.
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