Design and RF Characterization of the Co-Planar Slow Wave Structure for Millimeter-Wave BWO Applications

被引：2

作者：

Zhao, Chen ^{[1
]}

Tian, Shuo ^{[1
]}

Liu, Wangqi ^{[1
]}

Liao, Xiaoyi ^{[1
]}

Fang, Xiaoxing ^{[1
]}

Wang, Shaomeng ^{[2
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Sch Elect & Informat Engn, Nanjing 210044, Peoples R China

[2] Univ Elect Sci & Technol China, Natl Key Lab Sci & Technol Vacuum Elect, Chengdu 611731, Peoples R China

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2024年 / 71卷 / 01期

基金：

美国国家科学基金会;

关键词：

Backward wave oscillator (BWO); co-planar slow wave structure (SWS); equivalent circuit analysis; millimeter wave;

D O I：

10.1109/TED.2023.3330687

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article investigates the operation principle and dispersion properties of the co-planar slow wave structure (SWS). The SWS exhibits an additional phase shift of 2 pi seen by the electrons, owing to its physical configuration. The backward wave mode is the fundamental mode, naturally conducive to the backward wave oscillation. To analyze the characteristic properties of the SWS, an equivalent circuit model is proposed, consider-ing models of the transmission lines and discontinuities. The theoretical calculation results are in good agreement with the simulations. Moreover, a design of the SWS at V band is proposed with a -15-dB S-11 frequency range from 0 to 70 GHz. Particle-in-cell (PIC) simulation for the backward wave oscillator (BWO) based on the proposed SWS is studied. The results show that the proposed SWS has a tunable frequency range of 17 GHz and a maximum output power of 60 W at 69.5 GHz. In addition, the proposed SWS is fabricated using microfabrication techniques and the S-parameters are measured with the probe station. The developed SWS has the characteristics of wide bandwidth and high coupling impedance, which is suitable for the application of millimeter-wave BWO.

引用

页码：833 / 839

页数：7

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