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单只磁控管输出功率不能满足大规模工业应用,需要对多只磁控管进行相干功率合成.为解决普通磁控管相干功率合成所需的相位一致性,需要对普通磁控管引入注入锁频技术,以保障工作频率和相位差的稳定性.本文在阻抗匹配的条件下,结合磁控管稳定振荡的条件,从等效电路的角度出发对磁控管注入锁频原理进行分析,给出了在小注入比和大注入比情况下磁控管的注入锁频理论,大注入比情况比小注入比情况给出了更大的锁频带宽.采用MATLAB对理论方程进行解析求解,同时通过三维粒子仿真软件对锁频理论进行了对比验证,得出了在不同注入比下磁控管的锁频带宽和相位差微分方程,给出了在不同初始相位下的相位差变化曲线,得到了A6磁控管在自由振荡和注入锁频工作下三维模拟仿真的输出功率、频率和波形.模拟结果表明,在两种情形预测的锁频带宽内,磁控管均能被锁定并稳定工作,在大注入比下大注入比情况比小注入比情况更为准确.
Single magnetron output power can not meet the needs of large-scale industrial applications, the need for more than one magnetron coherent power synthesis.To solve the common magnetron coherent power required for phase consistency, the need for the ordinary magnetron into the injection Frequency-locked technology to ensure the stability of the operating frequency and phase difference.In this paper, under the condition of impedance matching, combined with the magnetron stable oscillation conditions, from the perspective of the equivalent circuit to magnetron injection frequency- The injection lock-in theory of the magnetron is given in the case of small injection ratio and large injection ratio. Larger injection ratio than the case of small injection gives greater bandwidth of frequency-lock. By using MATLAB to solve the theoretical equation, At the same time, the frequency-locked frequency theory was compared and verified by the 3D particle simulation software, and the bandwidth and phase difference differential equations of the magnetron at different injection ratios were obtained. The phase difference curves were given under different initial phases, The output power, frequency and waveform of A6 magnetron in three-dimensional simulation of free-running and injection-locking are obtained.The simulation results show that in the two modes of prediction, the magnetron Can be locked and stable work, in the large injection than under a large injection than the situation is more accurate than the small injection.