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A broadband slab lens antenna formed from gradient refractive index metamaterials composed of cross-shaped cells
Yuan, Guishan1,2; Dong, Xiaochun1,2; Deng, Qiling1; Liu, Chunheng1; Lu, Yueguang1; Shi, Haofei2; Du, Chunlei2
2014
摘要A slab lens antenna has been designed to enhance the directivity of a horn antenna efficiently in a wide range of frequencies. A gradient refractive index metamaterial is utilized to compensate phases of electromagnetic waves radiated from a horn, which can transform the cylindrical wave into a plane wave. To obtain broadband property, the gradient refractive index metamaterial composed of cross-shaped conductor, which works in a nonresonant status is designed, and the metamaterial is proved to be broadband, polarization insensitive, and lossless. The slab lens is designed by a collection of metamaterial unit cells with different geometric parameters, where the effective refractive index of the unit cells are determined by the size of cross-shaped conductors to form the required inhomogeneous refractive index distribution. The simulation and experiment results show that the lens located in front of a horn can considerably compress the antenna's radiation patterns over a wide band range from 12 to 18 GHz. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1124-1129, 2014 Copyright © 2014 Wiley Periodicals, Inc.
DOI10.1002/mop.28279
发表期刊Microwave and Optical Technology Letters
ISSN08952477
卷号56期号:5页码:1124-1129
收录类别EI
语种英语
EISSN10982760