Design of Tunable Electric Field Enhancement Structure based on Rydberg atoms

A tunable electric field enhancement structure that can be used for quantum microwave measurement is proposed in this paper. The structure consists of PCB and a copper connecting column, which facilitates integration and miniaturization. It achieves continuous electric field enhancement in the 215.6 MHz-319.6 MHz band with a relative bandwidth of 39% and the enhancement factor ranging from 316.9 (50.02 dB) to 419.8 (52.57 dB) by continuously sliding copper connecting column. Not only does it effectively improve the sensitivity of quantum microwave measurement, but it also further expands the application range of electric field enhancement structures.