Improvement of frequency source phase noise reduction design under vibration condition

¹ The 38th Research Institute of China Electronics Technology Group Corporation, 230088 Hefei, China
² Anhui Antenna and Microwave Engineering Laboratory, 230088 Hefei, China
³ Anhui Agricultural University, 230036 Hefei, China
⁴ School of Electronics and Information Engineering, Anhui University, 230601 Hefei, China
⁵ National Center of Engineering and Technology for Vehicle Driving Safety, Anhui Sanlian Group, 230081 Hefei, China

^* Corresponding author: zhangheng@hrbeu.edu.cn

Abstract

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 0.04~0.1g²/Hz amplitude range and 5~2000Hz frequency range.