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Tunable wideband absorber based on resistively loaded lossy high-impedance surface |
Dang Ke-Zheng (党可征), Shi Jia-Ming (时家明), Wang Jia-Chun (汪家春), Lin Zhi-Dan (林志丹), Wang Qi-Chao (王启超) |
State Key Laboratory of Pulsed Power Laser, Electric Engineering Institute, Hefei 230037, China |
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Abstract A lossy high-impedance surface comprised of two layers of resistive frequency selective surfaces is employed to design a tunable electromagnetic absorber. The tunability is realized through changing the composite unit cell by moving the top layer mechanically. To explain the absorbing mechanism, an equivalent circuit model with an interacting coefficient is proposed. Then, simulations and measurements are carried out and agree well with each other. Results show that the complex structure with a thickness less than λ0/4 is able to achieve a wideband absorption in a frequency range from 5.90 GHz to 19.73 GHz. Moreover, it is tunable in the operation frequency band.
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Received: 09 January 2015
Revised: 26 March 2015
Accepted manuscript online:
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PACS:
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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73.40.Rw
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(Metal-insulator-metal structures)
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75.70.Cn
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(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
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Corresponding Authors:
Shi Jia-Ming
E-mail: shijmeei@yahoo.com
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Cite this article:
Dang Ke-Zheng (党可征), Shi Jia-Ming (时家明), Wang Jia-Chun (汪家春), Lin Zhi-Dan (林志丹), Wang Qi-Chao (王启超) Tunable wideband absorber based on resistively loaded lossy high-impedance surface 2015 Chin. Phys. B 24 104104
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