Near-zero-index metamaterial lens combined with AMC metasurface for high-directivity low-profile antennas

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

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

A high-gain reduced-profile antenna is designed by combining the effects of a near-zero-index volumetric metamaterial lens and an artificial magnetic conducting (AMC) ground plane. The AMC/metalens antenna design presented here has 20% reduced height over an equivalent metalens antenna with conventional metallic ground plane at the cost of reduced peak directivity and pattern bandwidth. Both the metamaterial unit cells and the mushroom-type AMC structure are designed independently and retuned in the presence of the other for optimal performance. The lens collimates the electromagnetic radiation of a dipole feed by refraction as well as via a Fabry-Perot cavity effect, with resulting gain and patterns that are better than either mechanism can achieve individually. Full wave simulations of the entire metamaterial and AMC structure with a feed dipole agree well with measurements of the fabricated design.

Original languageEnglish (US)
Article number6725667
Pages (from-to)1928-1936
Number of pages9
JournalIEEE Transactions on Antennas and Propagation
Volume62
Issue number4
DOIs
StatePublished - Apr 2014

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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