Ka波段TE01模回旋速调管输出腔
Output cavity of Ka-band TE01 mode gyroklystron
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摘要: 利用模式展开和场匹配理论，建立了具有突变结构谐振腔的散射矩阵。在此基础上编制了FORTRAN计算程序，并对Ka波段TE01模回旋速调管的具有突变结构的开放式输出腔进行了数值计算。分析了回旋速调管输出腔的腔体长度和半径变化，以及输出耦合孔的半径和厚度变化对输出腔的品质因数和频率的影响。结果表明：由程序模拟输出腔所得到的计算结果与HFSS软件的结果一致；与冷测实验结果相比，品质因数的相对偏差为1.65%，谐振频率的偏差为10 MHz。Abstract: The output cavity with abrupt changes in radius for gyroklystron is studied using the mode-matching technique to build scattering matrix. A FORTRAN code is developed to calculate the scattering matrix. The effects of the cavity’s length and radius, the coupling aperture’s radius and thickness on the resonance characteristics of output cavity for Ka-band TE01 gyroklystron are analyzed. At the same time, the high frequency field distribution in the cavity is presented. The simulation result of output cavity obtained by the code shows good agreement with HFSS code simulation. Comparing the simulation result with the cold-test experimental result, the difference of quality factor is only 1.65% and the deviation of resonance frequency is 10 MHz.
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Key words:
- gyroklystron /
- output cavity /
- quality factor /
- resonance frequency /
- mode-matching /
- scattering matrix
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