Abstract:It is well known that the crystal oscillator is a vibrationsensitive device; the phase noise of it is usually degraded under the vibration conditions. The design method and influencing factors of the antivibration oven controlled crystal oscillator (OCXO) are analyzed, and the effect of vibration on the phase noise of OXCO is presented. A 100 MHz ultracompact, antivibration OXCO is designed with the micro vibration damper and low gsensitivity crystal resonator. The size of the developed OCXO is only 25.4 mm×25.4 mm×15 mm, the optimal phase noise is up to -147 dBc/Hz@1 kHz offset under the random vibration condition. The expected development goal is achieved.