A staggered double vane circuit for a W-band traveling-wave tube amplifier  

作　　者：赖剑强 魏彦玉 刘洋 黄民智 唐涛 王文祥 宫玉彬 

机构地区：[1]National Key Laboratory of Science and Technology on Vacuum Electronics,School of Physical Electronics,University of Electronic Science and Technology of China

出　　处：《Chinese Physics B》2012年第6期548-553,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China for Distinguished Young Scholars (Grant No. 61125103);the National Natural Science Foundation of China (Grant Nos. 60971038 and 60971031);the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2009Z003)

摘　　要：Based on the combination of a staggered double vane slow wave structure （SWS） and round electron beam, a 200-W W-band traveling-wave tube （TWT） amplifier is studied in this paper. The main advantages of round beam operation over the sheet beam is that the round beam can be formed more easily and the focus requirement can be dramatically reduced. It operates in the fundamental mode at the first spatial harmonic. The geometric parameters are optimized and a transition structure for the slow wave circuit is designed which can well match the signal that enters into and goes out from the tube. Then a TWT model is established and the particle-in-cell （PIC） simulation results show that the tube can provide over 200-W output power in a frequency range of 88 GHz-103 GHz with a maximum power of 289 W at 95 GHz, on the assumption that the input power is 0.1 W and the beam power is 5.155 kW. The corresponding conversion efficiency and gain at 95 GHz are expected to be 5.6% and 34.6 dB, respectively. Such amplifiers can potentially be used in high power microwave-power-modules （MPM） and for other portable applications.Based on the combination of a staggered double vane slow wave structure （SWS） and round electron beam, a 200-W W-band traveling-wave tube （TWT） amplifier is studied in this paper. The main advantages of round beam operation over the sheet beam is that the round beam can be formed more easily and the focus requirement can be dramatically reduced. It operates in the fundamental mode at the first spatial harmonic. The geometric parameters are optimized and a transition structure for the slow wave circuit is designed which can well match the signal that enters into and goes out from the tube. Then a TWT model is established and the particle-in-cell （PIC） simulation results show that the tube can provide over 200-W output power in a frequency range of 88 GHz-103 GHz with a maximum power of 289 W at 95 GHz, on the assumption that the input power is 0.1 W and the beam power is 5.155 kW. The corresponding conversion efficiency and gain at 95 GHz are expected to be 5.6% and 34.6 dB, respectively. Such amplifiers can potentially be used in high power microwave-power-modules （MPM） and for other portable applications.

关 键 词：traveling-wave tube staggered double vane slow wave structure W-BAND 

分 类 号：TN124[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]