Ka波段二次谐波回旋速调管放大器的研究

应用自行编制的电子注-波互作用的自洽非线性模拟程序,我们对Ka波段二次谐波回旋速调管放大器的注-波互作用进行了研究.通过对回旋速调管放大器的数值模拟,我们详细描述了二次谐波电子注-波互作用过程中电子群聚的物理图景;并研究了不同变化参数(漂移管长度和静磁场强度)对电子效率的影响.模拟结果表明:设计的二次谐波回旋速调管放大器的电子效率为15.4%,相应的输出功率约为161kW.     

Ka波段二次谐波回旋速调管放大器的PIC模拟

该文根据谐波回旋速调管放大器的注.波互作用特点,分析了放大器稳定工作的条件:对Ka波段二次谐波三腔回旋速调管放大器的注-波互作用进行了模拟计算,对放大器的注.波互作用电路参数进行了优化设计。模拟计算结果表明,在电子注电压为70kV,电子注电流15A,工作磁场为0.685T时,在35GHz频率放大器可以获得超过250kW的输出功率,大于21dB的增益,23%的效率和约为120MHz的带宽。计算结果为实际工程设计提供了有益的参考。     

光电子技术

0513334Ka 波段二次谐波回旋速调管放大器的输出特性[刊,中]/梁显锋//强激光与粒子束.—2005,17(1).—113-116(E)根据谐波回旋速调管放大器的注-波互作用特点,对 Ka 波段二次谐波三腔回旋速调管放大器的输出腔进行了数值模拟和优化设计,获得了输出腔末端高频波绕射输出孔径和腔体绕射 Q 值的对应关系。通过PIC 粒子模拟,分析了该放大器的频率响应特点等输出特性。结果表明,在35GHz 频率,磁场0.685T,电子注电压70kV,电流15A,横纵速度比为1.45,输入功率1.6kW 时,放大器可以获得超过220kW 的峰值输出功率、约22%的效率和23dB 的增益,3dB 带宽可以达到110MHz。参9     

220 GHz回旋速调管放大器互作用理论的研究

应用注波互作用非自洽非线性模拟程序,对220GHz回旋速调管放大器的注波互作用进行了研究;分析了工作电流、工作电压、直流磁场对电子注效率影响。模拟结果表明,设计出的双腔回旋速调管放大器的电子效率为48%,相应的输出功率为20 kW。     

Ka波段二次谐波回旋行波管放大器的研究

二次谐波回旋行波管放大器的互作用磁场比基波回旋行波管放大器的磁场降低了一半,从而降低了设计难度,具有广阔的应用前景。通过对周期介质加载结构的Ka波段二次谐波回旋行波管电子枪、高频结构、模式竞争以及注波互作用研究,确定了Ka波段TE02模二次谐波回旋行波放大器的基本工作参数,通过PIC模拟计算,在电子注电压为90 kV,注电流为25 A时,获得了大于200 kW的输出功率,超过40 dB的增益。     

35GHz三次谐波低电压回旋管理论研究

用动力学理论分析了三次谐波复合腔回旋管中的注-波互作用,选取了工作点;建立了突变复合腔回旋管的自洽非线性理论模型,该模型既考虑了电子和高频场的自洽相互作用又考虑了复合腔过渡部分模式的耦合,基于该理论模型,对一只三次谐波35GHz突变结构复合腔回旋管中电子注与H₆₁-H₆₂高频场互作用进行了数值模拟,当电流20A,磁场为0.442T时,互作用效率为24%,输出功率为210kW.     

3mm二次谐波回旋振荡管设计与数值模拟

二次谐波回旋振荡管的互作用磁场比基波回旋振荡管的磁场降低了一半,从而降低了设计难度,具有广阔的应用前景。通过对单腔结构的W波段二次谐波回旋振荡管高频结构、起振电流、模式竞争以及注波互作用研究,确定了W波段TE02模二次谐波回旋振荡管的基本工作参数,通过粒子模拟(PIC)软件进行计算,在电子注电压为60kV,注电流为6A及速度比为1.5时,获得了67.5kW的输出功率和超过18%的效率,且工作稳定。     

94GHz渐变复合腔回旋管的设计与实验

根据注-波互作用自洽非线性理论,设计了一种二次谐波回旋管的渐变复合腔结构,并进行了数值模拟;通过采用波纹波导结构和不同的相位重匹配技术进行优化分析,设计了一种94GHz波纹波导模式转换器;根据模拟计算结果研制出了94GHz渐变复合腔二次谐波回旋管。实际测试的结果表明：所研制的回旋管在电子注电压50kV,电流8．8A,工作磁场1．56T时工作频率为94．2GHz,峰值输出功率为115kW,平均输出功率为3kW,效率为26％。     

W波段二次谐波回旋行波管放大器

采用谐波工作的回旋管互作用磁场比基波磁场降低了1/s,可降低整管磁场设计难度,具有较大的应用前景。通过对W波段二次谐波回旋行波管高频介质加载结构、模式竞争和注波互作用研究,确定了该放大器的工作参数。非线性模拟表明,当应用100 kV,20 A,α=1.2的电子注时,该回旋管可在91 GHz频率处产生465 kW的输出功率和49 dB的增益结果。并且,基于耦合波理论,讨论了一个轴对称半径微扰的TE02~TE01输出模式变换器,效率在95%以上时,其带宽达到4 GHz。     

新型回旋速调管放大器链式群聚腔的模拟与设计

对新型回旋速调管放大器的链式群聚腔—TE模簇腔进行研究，通过三维电磁模拟对其进行分析和计算，讨论了损耗介质对群聚腔Q值的影响，以及内外腔耦合孔数量对谐振特性的影响．模拟计算结果和冷测实验吻合得很好．最后，为正在研制中的Ka波段三次谐波倍增回旋速调管放大器设计了一种链式群聚腔。     

Preliminary Design of a Ka-Band Second Harmonic Gyroklystron Amplifier

The preliminary design of a Ka-band, second harmonic, three cavities gyroklystron amplifier is presented. The beam-wave interaction in the second harmonic gyroklystron amplifier is studied by using a particle-in-cell code, and the validity of the design of the microwave circuit is also discussed. The results show that this gyroklystron can produce an output peak power of over 200kW with 20dB gain and 20% maximum efficiency at 35GHz.     

Calculation of the Electron Efficiency for a Two-Cavity Gyroklystron Amplifier by Using a Self-Consistent Code

The beam-wave interaction in a Ka-band, two-cavity fundamental gyroklystron amplifier is studied by using a self-consistent nonlinear simulation code. The electron efficiency for this gyroklystron amplifier is calculated, and the effect of various parameters, such as beam voltage, beam current, electron guiding center radius, velocity pitch ratio α and drift tube length on the electron efficiency is discussed in detail.     

Analysis and Numerical Calculations of the Beam-Wave Interaction for Gyroklystron Amplifiers

A four-cavity gyroklystron was designed and optimized after analysis and calculation of RF system and magnetron injection gun, numerical simulations showed that the TE₀₁₁ mode gyroklystron achieved 280kW peak output power, 38% efficiency, 35dB saturated gain with 250Mhz bandwidth centered at 34GHz for a 68 kV, 11A electron beam. The numerical simulation results were used to build a Ka band high power gyroklystron amplifier. In this paper, analysis and numerical calculation results of the beam-wave interaction are presented. The influences of electron beam, RF system parameters, magnetic field, and input RF signal on output power, efficiency, bandwidth and gain are discussed.     

Design of beam-wave interaction based on high efficiency of a high-power broadband klystron

The paper mainly presents the design of beam-wave interaction of a C-band high-peak- power high-efficiency broadband klystron. The beam-wave interaction section is designed based on considerations of efficiency and bandwidth synthetically. As a part of beam-wave interaction section, buncher section is simulated by Particle-In-Cell （PIC） code to observe the bunching process of electron beam to achieve high conversion efficiency of electron beam and RF field. When it comes to the other part, output circuit is designed as a three-section filter by an output cavity loaded with Chebyshev filter and the cold test results are given. The beam-wave interaction is simulated by EGUN code and Ar- senal-MSU code respectively. The simulated results indicated that, the existence of power dips in the operating bandwidth is verified by Arsenal-MSU code, comparing proper results by EGUN code. Then, the method that design parameters are not adjusted except parameters of buncher cavities to remove potential power dips is described. What is more, the simulated results of electron optics system are given by EGUN code and Arsenal-MSU code respectively. The further hot test results of klystron prove that the whole design of beam-wave interaction is effective.     

W波段四腔回旋速调管放大器

介绍了W波段四腔回旋速调管放大器的设计.放大器工作在基膜TE01圆电模式,电子束工作电压70 kV,工作电流6A,设计的双阳极磁控式注入电子枪,电子束纵横速度比1.5,速度零散小于4％.采用粒子模拟方法分析了各种参数对器件性能的影响.模拟结果显示,设计的放大器在电子束速度零散4％的情况下,增益35 dB,带宽800 MHz,输出功率100 kW,效率为23.8％.     

Self-Consistent Nonlinear Simulation of a Severed Slotted Gyro-TWT

The behavior of a two-stage slotted Gyro-TWT amplifier is evaluated with a self-consistent nonlinear slow-timescale simulation code. The effects of the sever position and the lengths of the first section, sever, and the second section on beam-wave interaction are discussed in this paper. And the influences of the magnetic field and the electron beam's velocity spread on efficiency, gain and bandwidth are also simulated and discussed in detail. The electron beam we employ encircles around the axis of the wave guide.     

三腔回旋速调管预群聚电流谐波分量研究

该文基于小信号理论导出多腔回旋速调管预群聚电流密度谐波分量与群聚参数之间的关系,并以三腔回旋速调管为例进行了相应的数值计算。结果表明:二次谐波分量明显地小于基波分量,并且二次谐波分量随第二腔群聚参数变化起伏相对于一次谐波分量变化较大;二次谐波分量与第二腔群聚参数依赖关系与群聚腔的场强幅度的相位,第一漂移区引起电子相位变化有关;输入腔Q值在一定范围对谐波分量影响极小。