Electromagnetic properties of an anisotropic stratified slab with an arbitrary orientation of the anisotropy axis under an oblique\nincidence of a plane harmonic wave are studied.The dependence of the eigen wave wavenumbers and the reflection coefficient on\nan anisotropy axis orientation and frequency is investigated. For the first time, the expression for the translation matrix is obtained\nin the compact analytical form. The controlled two-way dual-frequency (duplex) isolator based on the above described slab is\npresented for the first time. It is based on the properties of the anisotropic structure described here but not on the Faraday effect.
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