High-power Gaussian-beam reflector waveguide for use with a gyrotron quasi-optical mode converter

Analytic expressions for the reflector curvatures along with measured radiation patterns are given for a high-power Gaussian-beam reflector waveguide. The transverse phase structure of the beams considered are not accurately described by the simple Gaussian-beam relations so that the usual ABCD-matrix formulation is not appropriate to the type of beams and beam-forming networks considered.