Excitation of symmetrical transversal magnetic waves in a semiinfinite coaxial waveguide system

The radiation of electromagnetic waves in the semiinfinite waveguide coaxial system is calculated by the method of the boundary Riemann problem. The excitation source is a ring charge bunch with an alternating current moving along the system axis with relativistic velocity. It is pointed out that the expressions obtained for surface current coincides with the formulas obtained using the Wiener-Hopf-Fock modified method. Numerical calculations of average according to the time values of energy flux density and densities of scattered field reveales the energy direct flux inversion at the value of relativistic factor of 1.5