Optimization of a Frequency Diplexer Based on the Talbot Effect in Oversized Rectangular Waveguides

Calculations of a rectangular waveguide frequency diplexer for high power applications based on the Talbot effect are presented. For the calculation, a method based on analytical approximations, which is valid in highly oversized waveguides, as well as a more accurate mode analysis method are described. The latter allows the integration into an optimization code, which reduces mode conversion losses while maintaining practicable geometrical dimensions.