Low cost and broadband dual-polarization metamaterial lens for directivity enhancement

Jeremiah P. Turpin, Qi Wu, Douglas H. Werner, Bonnie Martin, Matt Bray, Erik Lier

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Abstract

Metamaterials have been used in many different configurations to enhance the radiation properties of antennas. However, the vast majority of these metamaterial applications only consider linearly polarized antennas. This paper discusses the theory, design, implementation, and measurements of a far-field collimating lens for use with a circularly-polarized crossed-dipole antenna constructed from a 3D-volumetric metamaterial slab. Zero-index materials (ZIM) and low-index materials (LIM) cause the magnitude and phase of the radiated field across the face of the lens to be distributed uniformly, increasing the broadside gain over the feed antenna alone. Full-wave simulations were used in design of the lens, and a prototype metamaterial lens (meta-lens) was constructed and measured to verify the theoretical predictions. The meta-lens was found to increase the measured directivity of a crossed-dipole feed antenna by more than 6 dB, in good agreement with numerical simulations.

Original languageEnglish (US)
Article number6272329
Pages (from-to)5717-5726
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Volume60
Issue number12
DOIs
StatePublished - Dec 17 2012

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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