The conversion of waves in a bent waveguide with a variable curvature

Numerical Simulation of a TM01–TE11 Waveguide Mode Converter by the FDTD Method

“…The source spectrum is close to a δ-function at the central frequency. In this case, transformation of the mode TM 01 into TE 11 is almost complete [1], which is observed in both lower diagrams in Fig. 4.…”

“…A perfectly matched load (PML) is located at the converter output. It is required to compare the obtained values of the energy coefficients of the circular-waveguide eigenmodes at the converter output with the results given in [1].…”

“…In this paper, we consider the converter which transforms the circular-waveguide mode TM 01 to the TE 11 mode and is described in [1,3] and designed for the future experiment at the Institute of Electrophysics of the Ural Branch of the Russian Academy of Sciences in Ekaterinburg. The TM 01 -TE 11 mode converter ( Fig.…”

“…1) is made of two centrally symmetric joined segments of a bent empty waveguide (i.e., two toroidal sectors with the same bend angles) of the constant circular cross section normal to the bending axis. The converter ensures a high (close to 100%) conversion coefficient of the above modes in a wide frequency band [1,3].…”

“…Waveguide mode converters [1] are used in mi- crowave transmission lines of high-power electron facilities [2] for obtaining modes convenient for transmission and use. In this paper, we consider the converter which transforms the circular-waveguide mode TM 01 to the TE 11 mode and is described in [1,3] and designed for the future experiment at the Institute of Electrophysics of the Ural Branch of the Russian Academy of Sciences in Ekaterinburg.…”