Unidirectional Loop Metamaterials (ULM) as Magnetless Artificial Ferrimagnetic Materials: Principles and Applications

  title={Unidirectional Loop Metamaterials (ULM) as Magnetless Artificial Ferrimagnetic Materials: Principles and Applications},
  author={Toshiro Kodera and Christophe Caloz},
  journal={IEEE Antennas and Wireless Propagation Letters},
  • T. KoderaC. Caloz
  • Published 16 April 2018
  • Materials Science
  • IEEE Antennas and Wireless Propagation Letters
This letter presents an overview of unidirectional loop metamaterial (ULM) structures and applications. Mimicking electron spin precession in ferrites using loops with unidirectional loads (typically transistors), the ULM exhibits all the fundamental properties of ferrite materials and represents the only existing magnetless ferrimagnetic medium. We present here an extended explanation of ULM physics and unified description of its component and system applications. 

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