Slow surface-wave propagation in partially filled coaxial solid-plasma waveguide in r-dependent azimuthal magnetic field

Propagation characteristics of 70 GHz slow surface waves in a partially filled coaxial solid-plasma waveguide in an r -dependent azimuthal magnetic field have been theoretically analyzed. Results of numerical analyses reveal that the nonuniformity of the magnetic field exerts no essential effect on the existence of the slow surface-wave resonance, but that the magnetic field required for the propagation of the slow wave is considerably reduced.