Properties of near and far fields for the electric line source illumination of a lossless metamaterial covered conductor cylinder |
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| Authors: | Q Wu H-L Wang F-Y Meng L-W Li J Wu |
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| Institution: | (1) School of Electronics and Information Technology, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, P.R. China;(2) Dept. of Electrical and Computer Engineering, National University of Singapore, Kent Ridge, 119260 Singapore, Singapore;(3) National Key Laboratory of Electromagnetic Environment, Beijing, 102206, P.R. China |
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| Abstract: | This work concentrated on an ELS (electric line source) radiating parallel to a lossless metamaterial covered infinitely long
conductor cylinder. First, the exact analytical solution of the electromagnetic model is derived. Second, the numerical results
based on the solution are given. Under different geometric and electromagnetic parameters, the patterns of the near field
are obtained; the directivity and normalized radiation resistance are presented to discuss the properties of the far field.
Because of the negative refraction of the metamaterial, it can be seen that there is a distinct “focus” in the metamaterial
layer from the near field pattern, which does not exist in conventional material layer. The presented electromagnetic model
is compared with the former, simpler model through the directivity and its validity is proven.
PACS 78.70.Gq; 81.05.Zx; 84.40.Ba |
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