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

Citation Author(s):: Toshiro Kodera and Christophe Caloz
Submitted by:: Toshiro Kodera
Last updated:: Tue, 05/17/2022 - 22:17
DOI:: 10.21227/H22D4M
Data Format:: PDF
Research Article Link:: Unidirectional Loop Metamaterials (ULM) as Magnetless Artificial Ferrimagnetic Materials: Principles and Applications
License:: Creative Commons Attribution

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Categories:: Other
Keywords:: Unidirectional Loop Metamaterials (ULM), nonreciprocity, ferrimagnetic materials and ferrites, gyrotropy, Faraday rotation, metamaterials and metasurfaces, transistors, isolators, circulators, leaky-wave antennas.

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This paper 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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