W波段回旋行波管输入输出段的改进设计  

Improved design of input and output structures of W-band gyro-TWT

作　　者：熊武健[1] 王丽[1] 罗勇[1] 刘国[1] 

机构地区：[1]电子科技大学物理电子学院,成都610054

出　　处：《强激光与粒子束》2013年第3期693-698,共6页High Power Laser and Particle Beams

摘　　要：在回旋行波放大器的设计中,输入输出段的性能直接影响到整管输出功率、效率及增益。设计了一种采用渐变过渡段的输入耦合器来减少电子注在前端的截获,而且略微地提高了耦合特性,有效带宽达到4.06GHz。采用二级切比雪夫渐变波导作为输出结构的耦合输出段,从仿真结果得到,在整个工作频段内,该结构中TE01工作模式的反射低于-20dB,TE01模向杂模TE02和TE03的耦合分别在-20dB和-30dB以下。An improved input coupler with tapered transitional section and output structure adopting cascaded Chebyshev waveguide,working in TE01 mode, has been designed for W band gyro-TWT. By means of theoretic analysis and numerical corn putation in Matlab,ihe outer radius, the length of input coupler＇s cavity and two contours of the section of coupling output are ob tained. According to the optimized results in HFSS, the bandwidth of the improved input coupler which meets the demand of SH less than -20 dB and S21 greater than -0.1 dB is 4.06 GHz. The cascaded Chebyshev structure has good performance on trans mitring TE01 mode and suppressing spurious modes with acceptable length.

关 键 词：回旋行波管 输入耦合器 渐变过渡段 耦合输出段 二级切比雪夫渐变 

分 类 号：TN129[电子电信—物理电子学]