Symmetrized coupler converting circular waveguide TM01 mode to rectangular waveguide TE10 mode

摘要

A coupler for converting rf power traveling in the TM 01 mode in a circular waveguide to the TE10 mode in a rectangular waveguide. The circular waveguide has an extension comprising an evanescent tube through the coupler allowing the propagation of a particle beam but disallowing the propagation of rf wave in the tube.