volume | PIER Journals

Abstract

In this paper, a coplanar waveguide-to-rectangular waveguide TE₂₀ mode transition using an antisymmetric tapered probe is proposed. The transmission coefficient of the TE₂₀ mode is nearly 0 dB, and the reflection coefficient of the coplanar waveguide mode is smaller than -10 dB from 13.48 GHz to 14.7 GHz. In this frequency range, the transmission coefficient of the TE₁₀ mode is smaller than -20 dB while the reflection coefficient of the coupled slotline mode is smaller than -19 dB. Besides, a microstrip line-to-rectangular waveguide TE₂₀ mode transition using an antisymmetric fork is proposed. The transmission coefficient of the TE₂₀ mode is nearly 0 dB, and the reflection coefficient of the microstrip line mode is smaller than -10 dB from 13.34 GHz to 15 GHz. In this frequency range, the transmission coefficient of the TE₁₀ mode is smaller than -20 dB. To verify the simulation results, the coplanar waveguide-to-rectangular waveguide TE₂₀ transition and the microstrip line-to-rectangular waveguide TE₂₀ mode transition are back-to-back fabricated and measured, with the measurement results agreeing well with the simulation ones.

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Dr. Yueh-Hsien Cheng

Prof. Chun-Long Wang