Author(s)

Yoshihiro Kokubo, Tadashi Kawai

Graduate School of Engineering, University of Hyogo, Himeji-shi, Hyogo, Japan.

Typical metallic waveguide mode converters convert electromagnetic waves from one mode to another mode for some frequency ranges. However, most electromagnetic waves outside of the specified frequency range are reflected. We report a design for a mode converter which passes the TE₁₀ mode at a low frequency range and efficiently converts the TE₁₀ mode to the TE₂₀ mode at a high frequency range. To gradually shift the mode profile from TE₁₀ to TE₂₀, dielectric rods are placed in a sequence along the waveguide starting near the sidewall and moving to the center of the waveguide with decreasing radius of the rods. This design reduces reflection of electromagnetic waves. Experimental tests demonstrate the efficacy of the design.

Waveguides, Dielectric Array, Scattering Parameter, Mode Converter

Kokubo, Y. and Kawai, T. (2016) Experiment of Frequency Range Dependent TE₁₀ to TE₂₀ Mode Converter. Journal of Electromagnetic Analysis and Applications, 8, 173-181. doi: 10.4236/jemaa.2016.89017.