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Tellegen and moving metasurfaces are two promising classes of nonreciprocal bianisotropic metasurfaces that offer extended functionalities for electromagnetic wave manipulation. However, in order to realize these metasurfaces, ferrite-based unit cells have been utilized that need to be biased by an external magnetic field. Inspired by recent works on magnet-free non-bianisotropic nonreciprocal building blocks, we introduce designs for magnet-free Tellegen and moving metasurfaces.
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Ra’di et al. (2016) studied this question.
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