  Reasonable vibration reduction design is an important way to achieve low
phase noise index of airborne frequency source output signal. Aiming at the
problem of phase noise deterioration of an airborne frequency source under
random condition, this paper proposes to improve the vibration reduction mode
crystal oscillator and reduce the distance between the barycenter of frequency
source and crystal oscillator vibration based on the analysis of the
relationship between the frequency source and the phase noise of output signal.
Experimental results show that the active noise control system achieves 62dB
phase noise compensation under the random vibration of 0.04-0.1g*g/Hz amplitude
range and 5-2000 Hz frequency range.
