Design and Analysis of an Overmoded Slow Wave Structure for High Power Terahertz BWO
New micromachining techniques now provide thetechnology to fabricate slow wave structure (SWS) which arecommonly used in the backward wave oscillators (BWOs) withdimensions suitable for operation in the terahertz region.In thispaper,results of theoretical and numerical simulation studies ofa large cross section,cylindrical SWS with the rectangluarlycorrugated inner wall are presented.The dispersion relation ofthe overmoded SWS with various dimensional parameters isanalyzed,and the distribution of the electrical fields in thespecific SWS is also determined.It is found that the steadystate,single-mode operation in this overmoded situation couldbe realized by the performance of surface wave near the uppercutoff point.Under the condition of 550kV beam voltage and1kA beam current,2.5D particle-in-cell simulation predictedthat the proposed SWS could be employed in the BWO systemto deliver an output power above 40 MW at the frequency ofabout 0.144THz with perfect time plot and free spectrumcharacteristic.
Overmoded slow wave structure surface wave terahertz source.
Hai Zhang Jianguo Wang Changjiang Tong
School of Electronics and Information Engineering,Xian Jiaotong University,Xian 710049,China School of Electronics and Information Engineering,Xian Jiaotong University,Xian 710049,China;North Northwest Institute of Nuclear Technology,Xian,710024
国际会议
2008 China-Japan Joint Microwave Conference(2008年中日微波会议)
上海
英文
439-443
2008-09-10（万方平台首次上网日期，不代表论文的发表时间）