Free and Driven Modes in Anisotropic Plasma Guides and Resonators

摘要

Starting with Maxwell's equations containing arbitrary electric and magnetic sources, a set of uncoupled wave equations has been formulated for an anisotropic plasma. Expressions for determining the electromagnetic field components in terms of the solutions of these equations and the transverse currents have been derived and tabulated. Setting the sources equal to zero, the characteristic equations have been obtained for the axially symmetric free modes in a circular cylindrical plasma filled guide, open plasma guide and coaxial plasma guide. Extensive numerical evaluations of the characteristic equation representing the plasma filled guide have been made for the lowest order mode and a set of omega-beta curves is presented for plasma densities, magnetic fields, phase velocities and guide radii varying from zero to infinity. These curves are compared with a set obtained through the use of quasi-static approximation and with the dispersion characteristics of the right and left hand circularly polarized plane waves in an unbounded plasma. Numerical evaluations are also presented graphically for the open plasma guide and the coaxial plasma guide. (Author)