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Journal of Electromagnetic Waves and Applications Volume 25, 2011 - Issue 16
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Articles

On the Synthesis of a Flat Lens using a Wideband Low-Reflection Gradient-Index Metamaterial

Y. Zhang State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China; Electromagnetic Communication Laboratory, Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
,
R. Mittra Electromagnetic Communication Laboratory, Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
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W. Hong State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
Pages 2178-2187 | Published online: 03 Apr 2012
 
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Abstract

A new type of gradient-index (GRIN) metamaterial (MTM), composed of a dielectric post array (DPA), is proposed for millimeter-wave applications to achieve wideband, low-reflection characteristics, and low sensitivity to the polarization of the incident wave. The design concept is different from that followed in GRIN, in which a systemic phase-shifting (PS) strategy is used for flat lens synthesis. The performance of the proposed lens has been numerically examined, and its focusing property has been investigated. The behavior of refraction index of the lens material has also been retrieved to see how it is compared with that of GRIN design.

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Related Research Data

3D-printed planar graded index lenses
Source: Institution of Engineering and Technology (IET)

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