Research Of Phase Noise Measurement System Based On Equivalent Phase Comparison Frequency

With modern electronic systems widely used and quickly development, high precision frequency sources used in standard signals has been put forward higher and higher requirements. Phase processing and phase noise measurement now play an increasingly important role in the research and performance measurement of the basic frequency sources.These Days, with the gradual perfection of Spectrum Analyzer, phase noise measurement in frequency domain has played an important role in the measurement of short term frequency stability. On the research of traditional phase noise measurement methods, a new phase processing and phase noise measurement method based on Equivalent Phase Comparison Frequency is proposed in this paper. By the use of phase difference change rale in a period, we can finish the phase comparison between any two signals with different frequencies. In this paper, the principles was showed in Chapter three, the design and realization of the system were described in detail in the fourth chapter. The experiments in the fifth chapter proved that it is possible to complete the phase lock between different frequency signals and the phase noise measurement. Compared with the traditional phase noise measurement system, because of no use of frequency synthesizer, low cost, simple circuits, high locking precision and low phase noise is possible.