Simple Skewon Medium Realization of Db Boundary Conditions

Considering the class of bi-isotropic media, a special case called the class of simple skewon (SS) media is defined. The SS medium depends on a single parameter. A plane wave incident on a planar interface of an SS medium is shown to reflect as from a DB boundary with vanishing normal components of D and B field vectors. This offers another possibility to realize the DB boundary conditions in terms of a medium interface. The same property is shown to apply for curved boundaries as well.