Analysis of high power bent circular waveguide TE01—TM11 mode converter of critical angle

Based on the mode coupling theory, this paper analyzes the critical angle of the TE01—TM11 mode converter completely by traditional waveguide axis constant curvature. Energy converted from TE01 to TM11 mode by all under the critical angle with multimode factor is got. The actual optimum angle of energy complete conversion is in the neighborhood of critical angle, and conversion efficiency is related to the curvature of bent waveguide.