%0 Journal Article
%T An Ultra-high Gain Gyrotron Traveling-Wave Amplifier with High Stability<br>具有高稳定性的超高增益回旋行波管放大器
%A 杜朝海
%A 刘濮鲲
%A 薛谦忠
%A 徐寿喜
%A 张世昌
%J 电子与信息学报
%D 2010
%I 
%X The linear theory together with the self-consistent nonlinear theory are applied to systematically study the stability of a Ka-band TE11 mode ultra-high gain gyrotron Traveling-Wave Amplifier (gyro-TWA). The analysis reveals the differences between the forward-wave absolute instability and the backward-wave oscillation, as well as the suppressing effect to these self-excited oscillations by using distributed loss technique. Using properly down-tapering the magnetic in the nonlinear stage to improve the stability of the system is proposed for the first time. Based on the analysis, a Ka-band TE11 mode gyro-TWA with ultra-high gain ability is designed, which adopts an electron beam with voltage of 100 kV, current of 7 A, velocity spread of 5%, and is capable of obtaining the -1 dB saturated bandwidth about 5 GHz and the highest gain about 80dB.
%K Gyro-TWT
%K Millimeter wave
%K Stability<br>回旋行波管
%K 毫米波
%K 稳定性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=21EAAE22DA6EF8474FBD6AB504F835CB&yid=140ECF96957D60B2&vid=9971A5E270697F23&iid=DF92D298D3FF1E6E&sid=959B2AB984B945BD&eid=4E17F6A5D7499FF3&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=17