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介电常数色散的异向介质天线-应用科学学报
28 4 Vol. 28 No. 4 20107 JOURNAL OF APPLIED SCIENCES — Electronics and Information Engineering Jul. 2010 DOI: 10.3969/j.issn.0255-8297.2010.04.014 8511 210007 . 11.5GHz5 17.68 dB. . TN82 0255-8297(2010)04-0413-04 Metamaterial Antenna Based on Anisotropic Permittivity SUN Yong-zhi, RAN Li-xin, WANG Wei-guang, CHEN Qiu-lin, ZHU Wei-qiang Research Institute No.8511, China Aerospace Science Industry Corporation, Nanjing 210007, China Abstract: We present an equation of dispersion characteristics for anisotropic metamaterial in this paper. In a particular direction, the dielectric constant of the material is zero at certain frequency. This property is used to produce the high-directional antenna. We develop a new metamaterial with a metallic cross-sectional structure, and simulate the radiated field of an omni-directional dipole antenna placed in the metamaterial. The radiated field is concentrated around the normal to the interface between the metamaterial and the air so that to give highly directional radiation. The gain of the antenna is 17.68 dB at 11.5 GHz, and the half power beam width is 5 degrees. The experimental results are consistent with the simulation. Keywords: anisotropic metamaterial, dispersion characteristics, highly directional antenna . Veselago1964 . Maxwell - (FP cavity: fabry-perot cavity)FP Temelkuran .
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