Precise frequency stability measurement technology based on group period synchronisation
DOI:
https://doi.org/10.24425/mms.2025.155801Abstract
A precise frequency stability measurement technology is proposed that utilises group periodic phase synchronisation of signals with varying frequencies. By quantifying the results of phase comparisons between different frequency signals and analysing these quantised outcomes, high-precision frequency measurements can be achieved. The phase coincidence points between the two comparison signals serve as the start and stop signals for the counter, where the time interval between identical phase coincidence points represents a complete cycle. Through the detection and analysis of phase coincidence points, the ±1 word counting error is eliminated, thereby enhancing the speed of frequency measurement. Employing the Field-Programmable Gate Array (FPGA) technology simplifies the measurement apparatus and reduces development costs. Experimental results demonstrate that this method achieves a frequency stability of 10-13 at 1s. Compared to traditional frequency measurement technologies, this approach offers significant advantages in terms of power consumption, equipment size, and measurement rate, making it crucial for high-tech applications such as Beidou satellite positioning, precision timing, high-precision time-frequency transmission and comparison, and scientific metrology.References
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