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Volume 31 Issue 3
Dec.  2010
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ZHANG Bo, LONG Hui, JIANG Feibo. Optical Image Encryption Algorithm Based on Coherent Superposition and Equal Modulus Vector Decomposition[J]. Journal of Electronics & Information Technology, 2018, 40(2): 438-446. doi: 10.11999/JEIT170489
Citation: Liu Tao, Cao Xiang-yu, Ma Jia-jun, Wang Wei. Study on Characteristics of Converging-Wave Based on Low Effective Permittivity Metamaterials[J]. Journal of Electronics & Information Technology, 2009, 31(3): 632-635. doi: 10.3724/SP.J.1146.2007.01836

Study on Characteristics of Converging-Wave Based on Low Effective Permittivity Metamaterials

doi: 10.3724/SP.J.1146.2007.01836
  • Received Date: 2007-11-28
  • Rev Recd Date: 2008-06-04
  • Publish Date: 2009-03-19
  • Through establishing structure model, the relation is presented among radiation power density of radiation source and effective permittivity and effective permeability. Simultaneously, the relations are numerically analyzed between radiation power density and permittivity, thickness, location of radiation source and operation frequency. The results show that radiation power density is directly proportional to the ratio of effective permittivity and effective permeability; relative low permittivity may remarkably improve radiation power density of radiation source; the maximum of radiation power density is the periodic function of thickness, and is less relation with the location of radiation source; the operation frequency band is very narrow in which the radiation power density can obtain larger values. The results may explain the reason theoretically that low permittivity metamaterials as a cover can enhance the gain of antenna.
  • Lin Qing-chun, Zhu Fang-ming, and He Sai-ling. A newphotonic bandgap cover for a patch antenna with a photonicbandgap substrate [J].Journal of Zhejiang University ScienceA.2004, 5:269-273[2]Weily A R, Horvath L, and Esselle K P, et al.. A planarresonator antenna based on a woodpile EBG material[J].IEEE Trans. on Antenna and Propagation.2005, 53(1):216-223[3]Th`evenot M, Cheype C, and Reineix A, et al.. Directivephotonic-bandgap antennas [J].IEEE Trans. on MicrowaveTheory and Technology.1999, 47(11):2115-2122[4]Cheype C, Serier C, and Thevenot M, et al.. Anelectromagnetic bandgap resonator antenna[J].IEEE Trans.on Antenna and Propagation.2002, 50(9):1285-1290[5]Boutayeb H, Denidni T A, and Sebak A R, et al.. Design ofelliptical electromagnetic bandgap structures for directiveantennas [J].IEEE Antenna and Wireless PropagationLetters.2005, 4:93-96[6]Hu Jun, Yan Chun-sheng, and Lin Qing-chun. A new patchantenna with metamaterial cover [J]. Journal of ZhejiangUniversity Science A, 2006, 7: 89-94.[7]Feresidis A P and Vardaxoglou J C. High gain planar antennausing optimised partially reflective surfaces[J].IEE Proc.Microwave. Antenna Propagation.2001, 148(6):345-350[8]Wang S, Feresidis A P, and Goussetis G, et al.. High-gainsubwavelength resonant cavity antennas based onmetamaterial ground planes [J].IEE Proc. -Microw.Antennas Propag.2006, 153(1):1-6[9]Al A, Bilotti F, and Engheta N, et al.. Metamaterial coversover a small aperture[J].IEEE Trans. on Antenna andPropagation.2006, 54(6):1632-1643[10]Ziolkowski R W and Kipple A D. Application of doublenegative materials to increase the power radiated byelectrically small antennas[J].IEEE Trans. on Antenna andPropagation.2003, 51(10):2626-2640[11]Stuart H R and Pidwerbetsky A. Electrically small antennaelements using negative permittivity resonators[J].IEEETrans. on Antenna and Propagation.2006, 54(6):1644-1653[12]李斌. 微波复合介质材料及其应用研究. [博士论文], 西安电子科技大学, 2006.Li Bin. Study of application and characteristics ofMetamaterials[D], Xidian University, 2006.[13]Enoch S, Tayeb G, and Sabouroux P, et al.. A metamaterialfor directive emission[J]. Physical Review Letters, 2002,89(21): 3901-3904.[14]Baccarelli P, Burghignoli P, and Frezza F. Effects of leakywavepropagation in metamaterial grounded slabs excited bya dipole source[J]. IEEE Trans. on Antenna and Propagation,2005, 53(3): 32-44.[15]Lovat G, Burghignoli P, and Jackson D R. Fundamentalproperties and optimization of broadside radiation fromuniform leaky-wave antennas [J]. IEEE Trans. on Antennaand Propagation, 2006, 54(5): 32-44.
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