Q波段大功率方形环对角单杆行波管研究  

Study of a V Band High-power Square-ring Vertex-bar Traveling-wave Tubes

作　　者：陶聪 魏望和[1] 丁文豪 冷劲松 朱焜 Tao Cong;Wei Wanghe;Ding Wenhao;Leng Jingsong;Zhu Kun(School of Science,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,China)

机构地区：[1]江西理工大学理学院,江西赣州341000

出　　处：《机电工程技术》2025年第2期50-53,115,共5页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金项目(62361031)。

摘　　要：随着卫星通信等领域对带宽需求的不断提高,工作频段逐渐从日益拥挤的Ka波段转向Q波段。为满足当前行波管高功率小型化的发展需求,基于圆环单杆结构(CRB)设计了一种Q波段方形环对角单杆(SRVB)慢波结构(SWS)。研究了方形环对角单杆结构前向波和反波的高频特性,通过HFSS和CST仿真计算得出:相同尺寸情况下的方形环比圆环结构有着更平坦的色散和更高的基波互作用阻抗。在中心频点处,SRVB结构的起振电流和起振长度均超过了CRB结构,这表明SRVB结构有着不弱于CRB结构的抑制反波振荡能力。注波互作用仿真使用13.4 kV的工作电压,200 mA的电流,在Q波段内SRVB最大平均输出功率达到467 W,最大电子效率为17.4%,最大增益为41.9 dB,平均3 dB带宽为8.5 GHz。与CRB结构相比,在功率、效率、增益、带宽上均占优势,整体性能提升明显且不易振荡。With the increasing demand for bandwidth in areas such as satellite communications,the operating frequency band has gradually shifted from the increasingly crowded Ka-band to the Q-band.In order to meet the development needs of high-power miniaturization of traveling wave tubes,a Q-band square-ring vertex-bar(SRVB)slow wave structure(SWS)is designed based on the circular ring-bar structure(CRB).The high-frequency characteristics of the forward and back waves of SRVB are studied,and the results are calculated by HFSS and CST simulations that SRVB has flatter dispersion and higher fundamental interaction impedance than CRB under the same size.At the center frequency,the star-oscillating current and star-oscillating length of the SRVB structure exceed those of the CRB structure,which indicates that the SRVB structure has the ability to suppress the back-wave oscillation not weaker than that of the CRB structure.The beam-wave interaction simulation uses an operating voltage of 13.4 kV,a current of 200 mA,a maximum average output power of 467 W,a maximum electronic efficiency of 17.4%,a maximum gain of 41.9 dB,and an average 3 dB bandwidth of 8.5 GHz in the Q-band.Compared with the CRB structure,it has advantages in power,efficiency,gain,and bandwidth,and the overall performance is significantly improved and not easy to oscillate.

关 键 词：方形环对角单杆 圆环单杆 起振电流 

分 类 号：TN124[电子电信—物理电子学]