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针对空间功率合成中多个微波源的锁相问题,设计了一种带有注入结构的Ku波段同轴渡越时间振荡器。在输入腔与三腔结构的调制腔之间,加入了效率99.9%以上的反射腔以防止功率向输入腔和发射端泄露。射频信号沿磁场方向注入同轴波导,既保证了磁场线圈的连续,又抑制了器件中的不对称模式。粒子模拟结果表明,当注入比为0.1、频率差为67MHz时可实现锁相。研究还发现,高功率的注入信号能使器件提前饱和,并且得到更高的输出功率。另外,相比Adler经典锁相理论,仿真结果得到了更大的锁相范围。
Aiming at the phase locking problem of multiple microwave sources in space power synthesis, a Ku-band coaxial time-of-flight oscillator with an injection structure is designed. Between the input cavity and the modulation cavity of the three-cavity structure, a reflection cavity with an efficiency of more than 99.9% is added to prevent the power from leaking to the input cavity and the transmission end. RF signal along the magnetic field into the coaxial waveguide, both to ensure the continuity of the magnetic field coil, but also inhibit the device in the asymmetric mode. Particle simulation results show that when the injection ratio of 0.1, the frequency difference of 67MHz phase lock can be achieved. The study also found that high power injection signals allow the device to saturate prematurely and achieve higher output power. In addition, compared to Adler’s classical phase-locked theory, the simulation results have a greater range of phase-locked.