Abstract：The continuous tuning measurement of microwave electric field is realized based on the energy level regulation of Rydberg atoms. A rubidium atomic gas chamber is used as a microwave electric field sensor to sense the signal field and the tuning field at the same time. The tuning field is used to fine-tune the Rydberg atomic energy level to realize the synchronous change of the resonant frequency of the signal field, thus expanding the frequency response range of the existing single-frequency microwave measurement. Under the effect of the tuning field that resonates with 68P3/2→66D5/2 transition, the amplitude difference of the measured AT splitting spectrum is used to determine the tuning change of the resonance frequency point of the signal field. Finally, the tuning range of the signal field with the frequency of 6.916GHz is widened from the original 30MHz to 150MHz. It lays a technical foundation for the quantum measurement and application of microwave electric field.
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2024, Vol. 45 
