Ka波段TE_(01)模回旋行波管宽带输入耦合器的设计  

Design of Broad-Band Input Coupler of Ka-Band TE_(01) Mode Gyro-TWT

作　　者：徐勇[1] 熊彩东[1] 罗勇[1] 王建勋[1] 鄢然[1] 蒲友雷[1] 王晖[1] 李宏福[1] 

机构地区：[1]电子科技大学物理电子学院,成都610054

出　　处：《真空科学与技术学报》2012年第3期208-213,共6页Chinese Journal of Vacuum Science and Technology

摘　　要：Ka波段TE01模回旋行波管的输入耦合器将矩形波导中输入的TE10模转化为圆波导中TE01模的行波场,以实现对回旋电子注角向速度的调制。本文首先对Ka波段TE01模回旋行波管的输入耦合器进行了解析分析和数值计算。通过数值计算得到输入耦合器的初步结构和尺寸,然后利用三维高频分析软件HFSS进行精确的模拟和修正。通过优化设计在Ka波段获得了3 dB带宽约为3 GHz,1 dB带宽大于2GHz的高性能TE1□0-TE4◎11-TE0○1输入耦合器和3 dB带宽约为3.5 GHz,1 dB带宽约为3 GHz的高性能TE1□0-TE5◎11-TE0○1输入耦合器。冷测实验研究表明优化设计结果与冷测结果相吻合。The broad-band input coupler of Ka-band TE01mode gyro-tmveling wave tube （TWT）, was designed, which transforms the TE01 mode in the rectangular waveguide to TE01 mode in the circular inner waveguide. The TE01 mode modulates the transverse velocity of the electron beams in the gyro-TWT. The design involved three stages. First, the input coupler was approximated,modeled,and calculated to get the preliminary results of interest, including its structures and sizes,etc.Second,the preliminary results were simulated and modified to improve the approximation, with the 3-dimen- sional, high frequency structure simulation （HFSS Code） software package. Finally, two types of the input coupler were designed and fabricated based on structure optimization. One was the ＂ ioptamal TE10-TE411-TElo input coupler, meeting the other TE10-TF_511-TE10 in- design requirements of 3 dB bandwidth of about 3 GHz, and ldB bandwidth of over 2 GHz;th 10put coupler,3 dB bandwidth of about 3.5 GHz, and ldB bandwidth of approximate 3 GHz. The results of the designed were found to agree fairly well with the cold test results.

关 键 词：回旋行波管输入耦合器同轴谐振腔宽带冷测 

分 类 号：TN129[电子电信—物理电子学]