等效电路计算同轴输出腔TM_(310)模式的间隙阻抗  

Calculation of gap impedance of TM_(310) mode in coaxial output cavity with equivalent circuit theory

作　　者：董玉和[1] 刘田达[1] 樊琼星[2] 王树忠[3] 

机构地区：[1]内蒙古科技大学理学院,内蒙古包头014010 [2]安徽蚌埠学院机电系,安徽蚌埠233030 [3]中国科学院电子学研究所,北京100190

出　　处：《强激光与粒子束》2013年第5期1226-1230,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61062001;61172015)

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。We have designed a single gap cylindrical coaxial cavity operating at transverse magnetic TMa-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 calcu- lated 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 analyziag TM010 mode in cylindrical cavi- ty, 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.

关 键 词：微波等效电路 间隙阻抗 同轴谐振腔 TM模式 冷测模拟法 

分 类 号：TN12[电子电信—物理电子学]