Fig. 1. Rydberg atom demodulation system and energy levels. (a) Block of Rydberg atom AM microwave demodulation; (b) ¹³³Cs ladder-type four energy levels

Fig. 2. Principle diagram of Rydberg atom system demodulation AM microwave

Fig. 3. Relationship between Rydberg atom cell transmissivity derivative and microwave Rabi frequency. (a) Curves between ∂T∂ΩMW and ΩMW; (b) curves between ∂2T∂ΩMW2 and ΩMW

Fig. 4. THD in the Rydberg atom cell demodulation AM microwave. (a) Relationship between ΩMW‑static and THD with ΩMW‑base‑am=2π×23.84kHz (the corresponding baseband signal electrical field intensity is 1 mV/m); (b) relationship between ΩMW‑base‑am and THD when the Rydberg atom cell is at the optimum linear operation point