Tunable Wideband Absorber with Ferrite Metamaterial
We proposed a new absorber based on Crescent Split Ring Resonators (CSRRs) that shows wideband absorption. This absorber is made of biased ferrite slab by embedding CSRRs. Simulation and analysis is carried out by FDTD method. The results show that the corresponding high absorption mainly originates from the CSRR’s geometry. This structure can be tuned by external magnetic field.
 Pendry J B, Holden A J, Robbins D J, et al. “Magnetism from conductors and enhanced nonlinear phenomena”, IEEE Trans.Microwave Theory and Techniques. 1999; 47: 2075- 2084.
 H. Tao, N. I. Landy, C. M. Bingham, X. Zang, R. D. Averitt, and W. J. Padilla, “A metamaterial absorber for the terahertz regime: design, fabrication and characterization”, Opt. Express, 2008;16: 7181-7188.
 H. Tao, C. M. Bingham, D. Pilon, K. Fan, A. C. Strikwerda, D. Shrekenhammer, W. J. Padilla, X. Zhang, and R. D. Averitt, “A dual band terahertz metamaterial absorber”, J. Appl. Phys. D, 2010; 43: 225102-225106.
 Y. Cheng, H. Yang, Z. Cheng, and Wu, “Perfect metamaterial absorber based on a split-ring cross resonator”, J. Appl. Phys. 2012; 102: 99-103.
 Yanzhang Dong, WeikaiXu, Shutian Liu, “Numerical Studies for Relative Bandwidth of Left-Handed Metamaterials with Split-Ring Resonators”, IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications” , 2009; 3: 821-825.
 R. Marqués, F. Martín, and M. Sorolla, “Metamaterials With Negative Parameters”, New York: 2008, Wiley.
 Microwave engineering, David M. Pozar.4th edition, New York: 2011,Wiley.
 Atre, A. C., García-Etxarri, A., Alaeian, H. and
Dionne. “A Broadband Negative Index Metamaterial at Optical Frequencies”, J.Advanced Optical Materials, Wiley. 2013; 1: 327-333.
 Zsolt Szabó, Gi-Ho Park, Ravi Hedge, and Er-Ping Li, “A Unique Extraction of Metamaterial Parameters Based on Kramers–Kronig Relationship”, IEE transaction on microwave theory and techniques, 2010; 60: 1743-1744.
 Yang Yong-Jun, Huang Yong-Jun, Wen Guang-Jun, Zhong Jing-Ping, Sun Hai-Bin, and Oghenemuero Gordon, “Tunable broadband metamaterials absorber consisting of ferrite slabs and a copper wire” Chinese Phys. B. 2012; 21.
 Hongmin Lee, “Design of Metamaterial Absorber Based on Resonant Magnetic Inclusion” Proceedings of ISAP, Nagoya, Japan, 2012.