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A linear-operator formalism for the analysis of inhomogeneous biisotropic planar waveguides

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2 Author(s)
Paiva, C.R. ; Dept. de Engenharia Electrotecnica e de Computadores, Inst. Superior Tecnico, Lisboa, Portugal ; Barbosa, A.M.

Using the theory of linear operators, guided electromagnetic wave propagation in inhomogeneous (nonreciprocal) biisotropic planar structures is analyzed in terms of a 2×2 matrix differential operator. Based on the concept of adjoint waveguide, a new biorthogonality relation for the guided hybrid modes is derived. For the special case of reciprocal biisotropic media or chiral media, the linear-operator formalism leads to a self-adjoint problem. As an application example, a general analysis of the radiation modes of a grounded chiroslabguide is also presented

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:40 ,  Issue: 4 )