Abstract: To solve the problem of the limited bandwidth,when measuring the RF electric field using Rydberg atom EIT-AT method,a method of continuous broadband RF field measurement is proposed.The experiment of quantum Rydberg RF electric field measurement is carried out in TEM cell.The fiber-coupled quantum probe is placed in TEM cell,based on the a model of non-resonance interaction between RF field and Rydberg atoms,According to the shifted spectrum frequency of Rydberg in electric field,the electric field can be calculated.The method can be used to the measurement of electric field for the continuous frequency between 50 MHz and 500 MHz,which enlarge the range of application of quantum field measurement,the propose can also be applied in other band electric field measurement,such as frequency above 1 GHz,the fiber coupled atom-based electric probe can also be used for electric field environment detection in narrow and small space,such as pipes and mini case.

Key words: TEM cell, Rydberg atom, Radio frequency, Electric field strength, Resonance frequency measurement, Laser spectrum splitting