%0 Journal Article
%T Theoretical Analysis of Conductivity and Dielectric Attenuation in Millimeter-wave TWT Helical SWS<br>理论分析毫米波螺旋线行波管慢波系统导体和介质损耗
%A Hao Bao-liang
%A Huang Ming-guang
%A Liu Pu-kun
%A Xiao Liu
%A Liu Wei
%A <br>郝保良
%A 黄明光
%A 刘濮鲲
%A 肖刘
%A 刘韦
%J 电子与信息学报
%D 2011
%I 
%X Conductivity and dielectric attenuation in millimeter-wave TWT helical Slow-Wave Structure (SWS) are analyzed by a stratified dielectric helix tape and a 3D electromagnetic model. In tape model, the imaginary part of complex propagation constant is considered as dielectric attenuation, and the conductivity losses are obtained by discontinuous surface current on metal helix and envelope. For 3D electromagnetic model, the RF losses of SWS are deduced through a quality factor and stored energy in a periodic structure with finite conductivity of helix and envelop and loss tangent of supported rods. An analysis of a Ka helical SWS shows that the conductivity loss of helix and dielectric attenuation of supported rods are greater than conductivity loss of envelope, the dielectric attenuation is linear with ceramic loss tangent and can not be neglected in millimeter wave band.
%K Helical Traveling Wave Tube (TWT)
%K Millimeter wave
%K Conductivity attenuation
%K Dielectric attenuation<br>螺旋线行波管
%K 毫米波
%K 导体损耗
%K 介质损耗
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=934EE55E15708DF89B794257BF622F9A&yid=9377ED8094509821&vid=27746BCEEE58E9DC&iid=0B39A22176CE99FB&sid=366B1248A15658C5&eid=E0172F1A638CE984&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=22