振动条件下频率源相位噪声恶化影响研究

Research on Effect of the Phase Noise Deterioration of Frequency Source in Vibration Condition

电子设备工作于机械振动较强的环境下,频率源的相位噪声会恶化,从而使通信系统不能正常工作。该文对某QPSK系统中频率源相位噪声因机械振动环境而恶化的问题进行了理论分析、仿真、试验等研究,提出通过选用加速度灵敏度更低的晶振,及更好地阻尼到晶体本身的力传递后,解决了整机无法减振的情况下如何在电路上进行减振的难题,使该QPSK系统正常工作。该方法具有很实际的应用价值和一定的学术价值。

When electronic equipment works in strong vibration environment, the phase noise of frequency source will be deteriorated, thereby communication system can not work normally. This paper conducts the theoretical analysis, simula- tion and test of the frequency phase noise problem of deterioration of a QPSK system because of vibration environment, and put forward the method of replacement of the crystal with lower acceleration sensitivity and damping the vibration magnitude transferred to crystal oscillator, and resolve the problem of how to damping in circuit in the cast the vibration can not be re- duced, so the QPSK system can work normally. This method has actual application value and certain academic value.