【摘要】 本文以工作在6～18GHz的T形夹持杆加载金属翼片螺旋线行波管为研究对象,采用螺距跳变和磁场跳变,提高了该行波管在工作频带内的输出功率和电子效率,在一定程度上抑制了二次谐波。计算结果表明,工作电压为3100V,电流为115mA时,6～18GHz内的输出功率大于56W,电子效率为15.77%～20.88%。较之于均匀螺距的设计,输出功率至少提高了10W,增幅为21.7%,电子效率至少提高了20.7%;在6～9GHz范围内,二次谐波比减小了1.36dB,降幅达13.2%。更多还原

【Abstract】 A 6～18 GHz metal fins loaded helix traveling wave tube(TWT)with T-shape rods is studied in this paper.By using phase velocity jump and magnetic field intensity jump technologies,the output power and electronic efficiency of the TWT are improved,and the second harmonic is suppressed to a certain extent.The simulation result indicates that the saturated output power can reach 56 Wand the electronic efficiency can range from 15.77%to 20.88% with beam voltage of 3100 Vand current of 115 mA.Comparing to the simulation result of TWTs without phase velocity jump and magnetic field intensity jump,the output power is increased by at least 10 W(the increasing percentage is 21.7%)and the improvement of the electronic efficiency is over 20.7%.In addition,the second harmonic ratio is decreased by 1.36 dB(dropped by 13.2%)in the frequency range of 6～9 GHz.更多还原