Modified reciprocity theorem for bianisotropic media

A modified reciprocity theorem is formulated for general bianisotropic media through the definition of a complementary medium. A bianisotropic medium is one in which the field vectors D and H depend on both E and B, and a moving mediucm appears bianisotropic to the laboratory observer even if it is isotropic in its rest frame. The conditions under which the modified reciprocity relationship will hold for moving gyrotropic and biaxial media are discussed.