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采用交错双栅结构,结合带状电子注,研究了一种工作在140 GHz频段的大功率行波管.本振模数值计算表明该结构具有良好的色散特性和耦合阻抗.针对所采用的慢波结构,提出了慢波过渡结构、输入输出耦合器和集中衰减器,保证了行波管的良好工作.利用三维大信号模拟计算的方法得到的结果显示,当电子注直流功率为5.115 kW,输入信号功率为0.1 W时,所研究的行波管能在132—152 GHz范围内提供大于300 W的峰值功率,其中在138 GHz时得到最大功率546 W,对应增益为37.37 dB.当在0.027—0.46 W内调节输入信号功率,可以保持该行波管在128—152 GHz频带内得到大于440 W的峰值功率,对应的电子效率大于8.6%.结果显示该行波管将在大功率短毫米波领域具有重要意义和潜在应用价值.
A high power TWT with frequency band of 140 GHz was studied by using the staggered double-gate structure and band electron injection. The numerical simulation of the mode-locked resonator shows that the structure has good dispersion characteristics and coupling resistance. Slow-wave structure, a slow-wave transient structure, input-output coupler and a concentrated attenuator are proposed to ensure the good work of the traveling wave tube.The results obtained by using the simulation calculation of three-dimensional large signal show that when the electron injection direct current power is 5.115 kW , And the input signal power is 0.1 W, the studied traveling wave tube can provide the peak power of more than 300 W in the range of 132-152 GHz, and the maximum power is 546 W and the corresponding gain is 37.37 dB at 138 GHz. 0.027-0.46 W, the input power of the input signal can keep the peak power of the traveling wave tube greater than 440 W in the 128-152 GHz frequency band, and the corresponding electron efficiency is greater than 8.6%. The results show that the traveling wave tube will have the advantages of high power short Millimeter wave field of great significance and potential applications.