一种开敞式脊加载折叠波导慢波电路的高频特性研究.PDF

一种开敞式脊加载折叠波导慢波电路的高频特性研究 1,2* 1 1,2 吕素叶 ,张长青 ,王勇 (1.中国科学院电子学研究所 高功率微波源与技术重点实验室 北京 100190； 2. 中国科学院大学 北京 100049) 摘要：提出了一种开敞式脊加载折叠波导慢波结构。通过除去直波导段周围的金 属边界，形成一种开敞式结构以减弱色散，同时在直波导段加脊以提高耦合阻抗。 研究表明，和传统结构相比，新型结构在不影响带宽的前提下，有效提高了耦合 阻抗，尤其在大功率设计情况下，耦合阻抗的提高接近1 倍。 关键词: 折叠波导；行波管；耦合阻抗；高频特性 中图分类号：TN124 文献标识码：A Study on the High-Frequency Characteristics of An Open Ridged Loaded Folded Waveguide Slow-Wave Circuit 1,2 1 1,2 LÜ Su-Ye , ZHANG Chang-Qing , WANG Yong (1. Key Laboratory of High Power Microwave Sources and Technologies, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; 2. University of Chinese Academy of Science, Beijing 100049, China) Abstract: An open ridged loaded folded waveguide slow-wave circuit has been proposed in this paper. By removing the metal boundary of the straight waveguide, an open structure has been formed to reduce the dispersion, while the ridge has been loaded to improve coupling impedance. Compared to the conventional structure the improved circuit structure not only increases the interaction impedance significantly but also keeps the dispersion characteristics well. Especially in the high-power design the coupling impedance is nearly doubled. Key words: folded waveguide, traveling-wave tube (TWT), coupling impedance, high-frequency characteristics PACS: 84.40.Dc, 84.40. Fe, 84.30.Ng, 41.75.-i 基金项目：国家重点基础研究发展计划(2013CB328901) Foundation items: Supported by the Major State Research Development Program of China under Grant 2013CB328901. 作者简介（Biography ）: 吕素叶(1981-), 女, 河北邯郸人, 博士研究生, 主要研究领域为毫米波器件. E-mail:lvsuye@163.com