Abstract
The electromagnetic behavior of a circular perfect electric conductor waveguide with various magnetoplasma filling configurations has been investigated near the cyclotron resonance region at 77 K with longitudinal magnetic bias. Faraday rotation in the forward and reverse directions along with the waveguide geometry effect provided the nonreciprocal attenuation to design an isolator for frequencies up to the terahertz region. Based on the finite element method, two-dimensional eigenvalue as well as three-dimensional numerical simulations are provided to illustrate the phenomena. Unprecedented performance was attained for the coaxial configuration in terms of the bias-to-frequency ratio. Other configurations were found to have some nonreciprocity as well.
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