Elliptically polarized modes in gyrotropic waveguides. II. An alternative treatment of the longitudinally magnetized case

Abstract

For pt.I see ibid., vol.9, p.1957, (1976). The gyrotropic waveguide, magnetized along the direction of propagation, is analysed by a conventional method which does not involve any initial assumptions regarding the state of polarization of waveguide modes. The problem is simplified by the use of complex helical coordinates in which the gyrotropic tensor assumes the diagonal form. The waveguide modes are shown to be elliptically polarized and dielectric boundary conditions are applied leading to a waveguiding condition which is outwardly similar to that applicable to isotropic dielectric guides but more complicated in content.