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带状注相对论扩展互作用速调管放大器是一种高功率、高频率的微波毫米波放大型器件,具有广阔的应用前景.本文分析了扩展互作用结构多间隙谐振腔的渡越时间效应,推导了2π模场情况下谐振腔的能量交换系数和电子负载电导,且通过计算表明工作在2π模式三间隙腔的电子负载电导是单间隙腔的9倍左右,多间隙结构有利于提高器件效率.利用三维粒子仿真软件,对工作在Ka波段的带状注相对论扩展互作用速调管放大器进行了模拟研究,采用宽高比为30:1的带状电子束以降低空间电荷效应,在电子束电压为500 kV,束流为1 k A,轴向引导磁感应强度为0.8 T的情况下,器件输出微波功率为190 MW,频率为40 GHz,器件效率为38%,器件增益为69 d B.
Band note relativistic extended-interaction klystron amplifier is a high-power, high-frequency microwave-millimeter-wave amplification device that has broad application prospects.This paper analyzes the transit time effect of multi-gap resonators with extended interaction structure, The energy exchange coefficient and electronic load conductance of the resonator under 2π mode field are deduced. The calculated results show that the electrical conductance of the three-cavity at 2π mode is about 9 times that of the single-cavity, and the multi-gap structure can improve the device efficiency A three - dimensional particle simulation software was used to simulate the band - gapd relativistic extended - effect klystron amplifier operating in the Ka band, using a ribbon beam with an aspect ratio of 30: 1 to reduce the space charge effect, When the beam voltage was 500 kV, the beam current was 1 kA and the axial flux density was 0.8 T, the output microwave power was 190 MW, the frequency was 40 GHz, the device efficiency was 38% and the device gain was 69 dB .