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等效电路计算同轴输出腔TM310模式的间隙阻抗
引用本文:董玉和,刘田达,樊琼星,王树忠.等效电路计算同轴输出腔TM310模式的间隙阻抗[J].强激光与粒子束,2013,25(5):1226-1230.
作者姓名:董玉和  刘田达  樊琼星  王树忠
作者单位:1.内蒙古科技大学 理学院, 内蒙古 包头 01 401 0;
摘    要:设计了外Q值较小,工作于高阶横磁TM310模的X波段速调管单间隙同轴输出谐振腔。用微波等效电路理论计算了高阶横磁TM310模情形六个漂移管的等效间隙中心位置,由此计算腔内等效间隙中心到输出波导内横向膜片的等效长度。以MATLAB编程计算得到同轴谐振腔TM310模式加载矩形波导滤波器输出回路的间隙阻抗,其结果与传统冷测模拟法计算结果吻合。验证了等效长度计算方法的正确性,用于圆柱腔基模的传统微波等效电路理论能用于分析同轴谐振腔高阶横磁模式输出回路,且比传统的冷测模拟法及场分析法更为快捷。

关 键 词:微波等效电路    间隙阻抗    同轴谐振腔    TM310模式    冷测模拟法
收稿时间:2012-09-02;

Calculation of gap impedance of TM310 mode in coaxial output cavity with equivalent circuit theory
Dong Yuhe,Liu Tianda,Fan Qiongxing,Wang Shuzhong.Calculation of gap impedance of TM310 mode in coaxial output cavity with equivalent circuit theory[J].High Power Laser and Particle Beams,2013,25(5):1226-1230.
Authors:Dong Yuhe  Liu Tianda  Fan Qiongxing  Wang Shuzhong
Affiliation:1.School of Science,Inner Mongolian University of Science and Technology,Baotou 014010,China;2.Department of Mechanical and Electrical Engineering,Bengbu College,Bengbu 233030,China;3.Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China
Abstract:We have designed a single gap cylindrical coaxial cavity operating at transverse magnetic TM310-mode with low external quality factor for X-band klystron. Under the condition of the gap impedance imaginary part being zero at the working center frequency, the equivalent gap center of drift tubes at TM310 in the coaxial cavity is calculated with equivalent circuit theory, and then the equivalent length between the center and the transverse diaphragms in output waveguide is calculated. The equivalent gap impedance of the cylindrical coaxial cavity coupled with a waveguide filter containing a pair of transverse diaphragms is calculated with MATLAB and the result is coinciding with that of the cold test. This indicates that the equivalent length calculation method is correct. Thus the microwave equivalent circuit theory is not only applicable to analyzing TM010 mode in cylindrical cavity, but also suitable for studying the output circuit of high order transverse magnetic mode in single gap cylindrical coaxial cavity. Furthermore, its process is speedier compared with traditional cold test simulation and field analysis methods.
Keywords:gap impedance  coaxial resonant cavity  310  cold test simulation
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