[1] Veselago V G. The electrodynamics of substances with simultaneously negative values of ε and μ[J]. Soviet Physics Uspekhi, 1968, 10(4): 509.
[2] Smith D R, Padilla W J, Vier D C, et al. Composite medium with simultaneously negative permittivity and permeability[J]. Physical Review Letters, 2000, 84(18): 4184-4187.
[3] Pendry J B. Negative refraction makes a perfect lens[J]. Physical Review Letters, 2000, 85(18): 3966-3969.
[4] Ma H, Qu S, Xu Z, et al. Material parameter equation for elliptical cylindrical cloaks[J]. Physical Review A, 2008, 77(1): 013825.
[5] Liu Yahong, Luo Chunrong, Zhao Xiaopeng. H-shaped structure of left-handed metamaterials with simultaneous negative permittivity and permeability[J]. Acta Physica Sinica, 2007, 56(10): 5883-5889.
[6] Li Wenqiang, Cao Xiangyu, Gao Jun, et al. Broadband and low-loss left-handed metamaterial composed of oblique triangular open-loop pairs resonator[J]. Acta Physica Sinica, 2012, 61(15): 154102.
[7] Song Yichuan, Ding Jun, Guo Chenjiang, et al. Design and analysis of a broadband metamaterial[J]. Journal of Microwaves, 2015, 31(2): 28-32.
[8] Dong Huaijing, Geng Youlin. Double cross-shape broadband low-loss and small units left-handed metamaterials based design and experimental verification[J]. Acta Physica Sinica, 2015, 64(2): 024102.
[9] Smith D R, Vier D C, Koschny T, et al. Electromagnetic parameter retrieval from inhomogeneous metamaterials[J]. Physical Review E, 2005, 71(3): 036617.
[10] Ziolkowski R W, Kipple A D. Application of double negative materials to increase the power radiated by electrically small antennas[J]. IEEE Transactions on Antennas & Propagation, 2003, 51(10): 2626-2640.
[11] Szabo Z, Park G H, Hedge R, et al. A unique extraction of metamaterial parameters based on Kramers-Kronig relationship[J]. IEEE Transactions on Microwave Theory & Techniques, 2010, 58(10): 2646-2653.
[12] Pendry J B, Holden A J, Stewart W J, et al. Extremely low frequency plasmons in metallic mesostructures[J]. Physical Review Letters, 1996, 76(25): 4773-4776.
[13] Yang Huai, Wang Chunhua, Guo Xiaorong. A novel dual-band left-handed metamaterials composed of multi-defects hexagonal structure[J]. Acta Physica Sinica, 2014, 63(1): 014103.
[14] Jin Dalin. Research on left-handed metamaterials and the applications of metamaterials in antenna[D]. Chengdu: University of Electronic Science and Technology of China, 2013: 22-24.