低反射低吸收高平均功率输出窗的设计  

RF windows of low reflectivity and absorption for high average power gyroklystrons

作　　者：罗勇[1] 李宏福[1] 徐勇[1] 邓学[1] 赵青[1] 

机构地区：[1]电子科技大学高能电子学研究所,四川成都610054

出　　处：《强激光与粒子束》2004年第11期1425-1428,共4页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题

摘　　要：　对高平均功率微波、毫米波输出窗的反射和吸收功率进行了理论分析,以蓝宝石输出窗为例,给出了低反射、低吸收的高平均功率回旋速调管放大器输出窗的设计方案。该放大器输出窗厚度为1.35mm,半径为9mm,工作频率为34GHz,在加工误差小于2%的情况下,输出窗反射率小于1%,当平均输出功率为10kW时窗片的吸收功率为2.5W。The major subjects of RF window design for high average power gyroklystron amplifiers are to reduce the reflectivity and absorption power in order to enhance amplifier's stability and protect output window. In this paper, the window's reflection and absorption are analyzed in detail. As an example, a sapphire window of 9 mm in diameter and 1.351 mm in thickness for 10 kW, 34 GHz, TE01 gyroklystron amplifier is presented. Its reflectivity is less than 1% if process error is within 2%, and its absorbing power is about 2.5 W while the output average power is 10 kW. As the window's reflectivity is sensitive to its thickness error, the thickness must be strictly controlled in processing.

关 键 词：输出窗 反射 吸收 回旋速调管放大器 高功率毫米波 

分 类 号：TN722[电子电信—电路与系统]