Design of pill-box output window for high power Q-band gyrotron traveling wave tube
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摘要: 利用等效电路理论，初步设计了窗片厚度为1.32 mm的回旋行波管盒型输出窗，再加入感性膜片，更改窗片形状，最终设计出了能承受25 kW平均功率、相对带宽达到14%、窗片厚度达到1.7 mm的Q波段新型宽频带回旋行波管盒型输出窗；采用高频软件HFSS与有限元分析软件ANSYS协同仿真的新方法对回旋行波管盒型窗进行热特性研究表明，盒型窗理论上功率容量达到62 kW平均功率，说明输出窗窗片承受25 kW平均功率的可行性，窗片中心与边缘的温差为66 ℃，没有达到陶瓷窗片的临界温差158 ℃，验证了新型盒型窗设计的合理性。Abstract: Using the equivalent circuit theory, we design a pill-box output window for Q-band high power gyrotron traveling wave tube (gyro-TWT) with a thickness of 1.32 mm. Through inserting the inductive diaphragms and changing the shape of the window, the designed pill-box output window can withstand an average power of 25 kW, the relative bandwidth is 14%, and its thickness is changed to 1.7 mm. This paper uses a high frequency software HFSS combined with a new method of collaborative simulation of finite element analysis software ANSYS to simulate the thermal characteristics of the pill-box output window. It shows that the new-type of pill-box can withstand an average power capacity of 25 kW at the bandwidth, and the temperature difference between center and edge of the window is 66 ℃, while the tolerance temperature is 158 ℃ of the ceramic window. Thus, it verifies the rationality of the new pill-box output window for Q-band high power gyro-TWT.
期刊类型引用(2)
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