基于新型折叠波导的双频3π带边振荡器研究
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摘要
为实现折叠波导慢波结构色散曲线的全维度开发,采用交错子周期折叠波导作为新型慢波结构,开展了3π带边双频振荡器的模拟和设计研究。利用新型折叠波导构建了3π止带,得到了带边高耦合阻抗及双不稳定性特征,实现强电子注-电磁波互作用,获得可双频工作的振荡器。利用CST粒子工作室对振荡器的三维注-波互作用PIC模拟进行了系统研究,振荡频率分别集中在89和95GHz附近,以低频功率最优化为目标得到了3π止带双频振荡器的设计方案,在考虑了高频损耗的条件下,在88.72GHz得到了126W的最大振荡输出功率,为开展实际器件的研制工作奠定了基础。
In order to achieve full use of dispersion curve of folded waveguide slow wave structure(FWG SWS),based on stagger half-period FWG SWS,we made simulation and preliminary design of a3πband-edgedual-frequency oscillator.The novel slow wave structure can produce obvious stop-band at the3πphase shift with strong beam-wave interaction at the upper and lower cut-off frequencies.With CST Particle Studio,89 GHz and 95 GHz oscillationwas verified by 3 Dbeam/wave PIC simulation.To achieve the maximum power of lower frequency,the preliminary design was optimized.When the condition of conductivity issupposed to be 1.7×107 S/m,the output power of the oscillatorreaches 126 W at 88.72 GHz,which lays a foundation for research and development of 3πband-edgedual-frequency oscillators.
In order to achieve full use of dispersion curve of folded waveguide slow wave structure(FWG SWS),based on stagger half-period FWG SWS,we made simulation and preliminary design of a3πband-edgedual-frequency oscillator.The novel slow wave structure can produce obvious stop-band at the3πphase shift with strong beam-wave interaction at the upper and lower cut-off frequencies.With CST Particle Studio,89 GHz and 95 GHz oscillationwas verified by 3 Dbeam/wave PIC simulation.To achieve the maximum power of lower frequency,the preliminary design was optimized.When the condition of conductivity issupposed to be 1.7×107 S/m,the output power of the oscillatorreaches 126 W at 88.72 GHz,which lays a foundation for research and development of 3πband-edgedual-frequency oscillators.
引文
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[2]冯进军,蔡军,胡银富,等.周期结构电磁特性在高频真空器件中的应用[J].北京航空航天大学学报,2015,41(10):1785-1791.
[3]蔡军,邬显平,冯进军.太赫兹折叠波导慢波结构止带振荡器[J].太赫兹科学与电子信息学报,2014,(02):162-165.
[4]Cai J,Wu X,Feng J.SWS Band-Edge Oscillator[C].IEEE International Vacuum Electronics Conference,CA:Monterey,2014:63-64.
[5]Cai Jun,Du Yinghua,Xie Qingmei,et al.Investigation of a THz CW Band-Edge Oscillator[C].IEEE International Vacuum Electronics Conference,CA:Monterey,2018:167.
[6]Cai Jun,Feng Jinjun,Wu Xianping.Folded Waveguide Slow Wave Structure with Modified Circular Bends[C].IEEE Trans on Electron Devices,2014,61(10):3534-3538.
[7]Khanh T Nguyen,Alexander N Vlasov,Lars Ludeking,et al.Design Methodology and Experimental Verification of Serpentine Folded-Waveguide TWTs[C].IEEETrans Electron Devices,2014,61(6):1683.
[8]Chernin D,Antonsen T M,Jr,et al.1-D Large Signal Model for Folded-Waveguide Traveling Wave Tubes[C].IEEE Trans Electron Devices,2014,61(6):1703.
[9]Chernin D,Antonsen T M,Jr,et al.TWT Stability for Frequencies near a Band Edge[C].Proc 14th IEEEIVEC,2013.
[10]Liu S S,Cai J,Feng J J,et al.Characteristics Study of3πStop-Bands of Folded Waveguide Slow-Wave Structures in V-Band Traveling Wave Tubes[J].IEEE Transactions on Electron Devices,2016,63(3):1294-1298.
[11]王东宇,蔡军.交错子周期折叠波导慢波结构冷特性研究[J].太赫兹科学与电子信息学报,2018,16(1):126-130.
[12]Feng Jinjun,Cai Jun,Hu Yinfu,et al.Development of W-Band Folded Waveguide Pulsed TWTs[J].IEEETrans Electron Devices,2014,61(6):1715-1725.