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设计了三种类型吸波体, 分别为基于正方形金属贴片(square metal patch, SMP) 结构超材料吸波体、 电阻型频率选择表面(Resistance Frequency Selective Surface, RFSS) 吸波体和SMP与RFSS的复合结构吸波体. 采用FDTD算法分别对这三种类型吸波体的电磁波吸收特性进行数值模拟分析. 模拟得到的结果表明: 在整个230 GHz频率范围内, SMP吸波体, 通过几何参数的设计可以实现多频窄带强吸收; RFSS吸波体, 通过方块电阻的设计可以实现高频宽带强吸收, 但强吸收的带宽有限; SMP与RFSS的复合结构吸波体, 在325 GHz之间吸收率大于90%以上, 且宽频范围内与自由空间具有较好的阻抗匹配特性.Three kinds of absorbers, based on square metal patch structure(SMP) metamaterials, resistance frequency selective surface (RFSS), and the combined SMP with RFSS structures, are designed, respectively. The absorptivities of these absorbers are simulated and analyzed by FDTD method. The simulation results indicate that in a frequency range of 230 GHz, SMP absorber can achieve stronger multi-bands absorption by the proper design of geometrical parameters of unit cell; RFSS absorber can achieve stronger high-frequency broadband absorption by the proper design of the square resistance of unit cell. However, the bandwidth of stronger absorption is limited; the absorption of the composite absorber combined with SMP and RFSS structure is greater than 90% in a frequency range of 325 GHz, which has a characteristic of better impedance matching to the free space in a wide frequency range.
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[12] Cheng Y Z, Yang H L, Cheng Z Z, Xiao B X 2011 Photonics and Nanostructures-Fundamentals and Applications 9 8
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[16] Filippo C, Agostino M, Giuliano M 2010 IEEE Transactions on Antennas and Propagation 58 1551
[17] Gu C, Qu S B, Pei Z B, Xu Z, Lin B Q, Zhou H, Bai P, Gu W, Peng W D, Ma H 2011 Acta Phys. Sin. 60 087802 (in Chinese) [顾超, 曲少波, 裴志斌, 徐卓, 林宝勤, 周航, 柏鹏, 顾魏, 彭卫东, 马华 2011 物理学报 60 087802]
[18] Filippo C, Agostino M, Giuliano M 2009 IEEE Radio and Wireless Symposium 978 4224
[19] Luo H, Cheng Y Z, Gong R Z 2011 Eur. Phys. J. B 81 387
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[1] Sugimoto S, Haga K, Kagotani T, Inomata K 2005 J. Magn. Magn. Mater. 290 1188
[2] Cui Z W, Ma W, Qiu L D, Zhang H T 2008 Electromagnetic Metamaterials and its Applications (Beijing: National Defense Industry Press) p8 (in Chinese) [崔万照, 马伟, 邱乐德, 张洪太 2008 电磁超介质及其应用[M]. 2008. (北京: 国防工业出版社) p8
[3] Shelby R A, Smith D R, Schultz S 2001 Science 292 77
[4] Schurig D, Mock J J, Justice B J, Cummer S A, Pendry J B, Starr A F, Smith D R 2006 Science 314 977
[5] Hao J M, Yuan Y, Ran L X, Jiang T, Kong J A, Chan C T, Zhou L 2007 Phys. Rev. Lett. 99 063908
[6] Landy N I, Sajuyigbe S, Mock J, Smith D R, Padilla W J 2008 Phys. Rev. Lett. 100 207402
[7] Cheng Y Z, Xiao T, Yang H L, Xiao B X 2010 Acta Phys. Sin. 59 0536 (in Chinese) [程用志, 肖婷, 杨河林, 肖柏勋 2010 物理学报 59 0536]
[8] Li L W, Li Y N, Soon Y T, Mosig J R, Martin O J F 2010 Appl. Phys. Lett. 96 4101
[9] Avitzour Y, Yaroslav A, Urzhumov, Shvets G 2009 Phys. Rev. B 79 045131
[10] Lockyear M J, Hibbins A P, Sambles J R, Hobson P R, Lawrence C R 2009 Appl. Phys. Lett. 94 041913
[11] Zhu B, Feng Y J, Zhao J M, Huang C, Jiang T 2010 Appl. Phys. Lett. 97 051906
[12] Cheng Y Z, Yang H L, Cheng Z Z, Xiao B X 2011 Photonics and Nanostructures-Fundamentals and Applications 9 8
[13] Gu S, Barrett J P, Hand T H, Popa B I, Cummer S A 2010 J. Appl. Phys. 108 064913
[14] Gu C, Qu S B, Pei Z B, Zhou H, Xu Z, Bai P, Peng W D, Lin B Q 2010 Chin. Phys. Lett. 27 117802
[15] Liu H T, Cheng H F, Chu Z Y, Zhang D Y 2007 Materials & Design 28 2166
[16] Filippo C, Agostino M, Giuliano M 2010 IEEE Transactions on Antennas and Propagation 58 1551
[17] Gu C, Qu S B, Pei Z B, Xu Z, Lin B Q, Zhou H, Bai P, Gu W, Peng W D, Ma H 2011 Acta Phys. Sin. 60 087802 (in Chinese) [顾超, 曲少波, 裴志斌, 徐卓, 林宝勤, 周航, 柏鹏, 顾魏, 彭卫东, 马华 2011 物理学报 60 087802]
[18] Filippo C, Agostino M, Giuliano M 2009 IEEE Radio and Wireless Symposium 978 4224
[19] Luo H, Cheng Y Z, Gong R Z 2011 Eur. Phys. J. B 81 387
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