Quasi-Static Magnetic Field Shielding Using Longitudinal Mu-Near-Zero Metamaterials.

ABSTRACT: The control of quasi-static magnetic fields is of considerable interest in applications including the reduction of electromagnetic interference (EMI), wireless power transfer (WPT), and magnetic resonance imaging (MRI). The shielding of static or quasi-static magnetic fields is typically accomplished through the use of inherently magnetic materials with large magnetic permeability, such as ferrites, used sometimes in combination with metallic sheets and/or active field cancellation. Ferrite materials, however, can be expensive, heavy and brittle. Inspired by recent demonstrations of epsilon-, mu- and index-near-zero metamaterials, here we show how a longitudinal mu-near-zero (LMNZ) layer can serve as a strong frequency-selective reflector of magnetic fields when operating in the near-field

SUBMITTER: Lipworth G 

PROVIDER: S-EPMC4522651 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature