Flexible and elastic metamaterial absorber for low frequency, based on small-size unit cell

Using a planar and flexible metamaterial (MM), we obtained the low-frequency perfect absorption even with very small unit-cell size in snake-shape structure. These shrunken, deep-sub-wavelength and thin MM absorbers were numerically and experimentally investigated by increasing the inductance. The p...

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Bibliographic Details
Published in:Applied physics letters 2014-07, Vol.105 (4)
Main Authors: Yoo, Y. J., Zheng, H. Y., Kim, Y. J., Rhee, J. Y., Kang, J.-H., Kim, K. W., Cheong, H., Kim, Y. H., Lee, Y. P.
Format: Article
Language:English
Subjects:
Absorbers (materials)
ABSORPTION
Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Electromagnetic noise
Electronic devices
ELECTRONIC EQUIPMENT
Figure of merit
GHZ RANGE
Inductance
Metamaterials
MHZ RANGE
NOISE
Periodic variations
PERIODICITY
THICKNESS
Unit cell
WAVELENGTHS
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Summary:Using a planar and flexible metamaterial (MM), we obtained the low-frequency perfect absorption even with very small unit-cell size in snake-shape structure. These shrunken, deep-sub-wavelength and thin MM absorbers were numerically and experimentally investigated by increasing the inductance. The periodicity/thickness (the figure of merit for perfect absorption) is achieved to be 10 and 2 for single-snake-bar and 5-snake-bar structures, respectively. The ratio between periodicity and resonance wavelength (in mm) is close to 1/12 and 1/30 at 2 GHz and 400 MHz, respectively. The absorbers are specially designed for absorption peaks around 2 GHz and 400 MHz, which can be used for depressing the electromagnetic noise from everyday electronic devices and mobile phones.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4885095