A Millimeter Wave High-Order TE13 Mode Converter

作者：Liu, Guo^*; Wang, Yan; Pu, Youlei; Wang, Jianxun; Yan, Ran; Luo, Yong; Wang, Shafei

来源：IEEE Transactions on Electron Devices, 2016, 63(7): 2907-2911.

DOI：10.1109/TED.2016.2562025

• Gyrotron travelling wave tube
• high-order mode (HOM)
• mode converter

In this paper a methodology to excite a circular high-order TE13-mode via a rectangular TE50 mode was proposed and verified by the millimeter wave measurement. This topology can also be applied to launch other high-order modes (HOMs) such as TE1n, TE2n' and TE0n' (n or n' = 1, 2, 3) modes via different transition rectangular TEm0 (m = 2n - 1 or m = 2n') modes, which can be achieved by adjusting the number of coupling apertures and optimizing dimensions of tapered waveguides. A W-band TE13 mode converter was designed and analyzed. Two identical converters connected back to back as a proof-of-principle operating at Q-band were fabricated and measured. Good performance was observed, which was in good agreement with the simulation results. This HOM converter has many potential applications in areas such as gyro-devices, high-power transmission lines, RF multimode systems of accelerators, microwave/plasma, and antenna systems.

• 出版日期2016-7
• 单位电子科技大学