Design Of RF Module And Temperature Module For Chip Scale Atomic Clock

Atomic clocks use the local oscillator to lock the atomic hyperfine levels, thus getvery accuracy and stable frequency reference. The world’s first atomic clock wasestablished by NIST in1949utilizing the ammonia molecules. Traditional atomic clockswhich are bulky, heavy, and power hungry, are not suitable for portable applications. Onthe other side, wireless communications, earth exploration, power transportation network,military and defense systems require precise clock timekeeping with low-powerconsumption, and it proposes the development of low-power miniature atomic clocks. It isdifficult to narrow down the volume of atomic clocks with conventional design, due to thepresence of microwave resonator whose size is determined by the wavelength of theresonance microwave, and it limits the development of miniaturized atomic clocks.However, with the principle of CPT proposed and the emergence of MEMS-made atomicresonance package, miniaturized atomic clocks become possible.This paper aims to investigate the key parts composing low-power chip-scale atomicclocks, including the temperature servo module, RF module and etc. RF phase noise isbetter than-70dBc/Hz@300Hz, temperature module keeps temperature constant andbalanced, and ultimately the entire performance of the prototype is: phase noise is-65.8dBc/Hz@1Hz, short-term stability is5.356×10-11, the long-term stability is4×10-12,power consumption is about200mW and the size of prototype is6*6cm2。...