强激光与粒子束
彊激光與粒子束
강격광여입자속
HIGH POWER LASER AND PARTICLEBEAMS
2011年
6期
1589-1592
,共4页
王亚军%陈樟%程焰林%施志贵%殷海荣
王亞軍%陳樟%程燄林%施誌貴%慇海榮
왕아군%진장%정염림%시지귀%은해영
冷测特性%折叠波导%仿真%THz辐射
冷測特性%摺疊波導%倣真%THz輻射
랭측특성%절첩파도%방진%THz복사
cold characteristics%folded waveguide%simulation%terahertz radiation
优化设计了一种220 GHz的折叠波导慢波结构的尺寸,对其冷测特性如色散、耦合阻抗和衰减进行了分析.理论分析和软件仿真结果表明设计的折叠波导慢波结构在中心频率处具有较平缓的色散关系,较高的耦合阻抗和较低的电路衰减.互作用模拟表明,在电子注电压为20 kV,电流为10 mA时,27 mm(50个周期)的折叠波导慢波结构在220 GHz具有14.5dB的增益,3 dB带宽为16.3 GHz(211.9～228.2 GHz).
優化設計瞭一種220 GHz的摺疊波導慢波結構的呎吋,對其冷測特性如色散、耦閤阻抗和衰減進行瞭分析.理論分析和軟件倣真結果錶明設計的摺疊波導慢波結構在中心頻率處具有較平緩的色散關繫,較高的耦閤阻抗和較低的電路衰減.互作用模擬錶明,在電子註電壓為20 kV,電流為10 mA時,27 mm(50箇週期)的摺疊波導慢波結構在220 GHz具有14.5dB的增益,3 dB帶寬為16.3 GHz(211.9～228.2 GHz).
우화설계료일충220 GHz적절첩파도만파결구적척촌,대기랭측특성여색산、우합조항화쇠감진행료분석.이론분석화연건방진결과표명설계적절첩파도만파결구재중심빈솔처구유교평완적색산관계,교고적우합조항화교저적전로쇠감.호작용모의표명,재전자주전압위20 kV,전류위10 mA시,27 mm(50개주기)적절첩파도만파결구재220 GHz구유14.5dB적증익,3 dB대관위16.3 GHz(211.9～228.2 GHz).
A 220 GHz folded waveguide slow-wave structure is designed and its dispersion relation,interaction impedance and circuit attenuation are analyzed.The simulation results show good agreement with the theoretical formula analysis.The folded waveguide slow-wave structure has broad cold bandwidth about 119 GHz,flat dispersion relation,fairly high interaction impedance about 3 Ω and low circuit attenuation for a 220 GHz central frequency.The large signal performance of 27 mm (50 periods) folded waveguide circuit is predicted.Simulations show that the nonlinear gain is 14.5 dB at 220 GHz where beam voltage and current are 20 kV and 10 mA,respectively.A saturated 3 dB bandwidth is 16.3 GHz (211.9 GHz to 228.2 GHz).
