Fig. 1. Schematic of microwave frequency comb signal generation

Fig. 2. System of microwave frequency comb signal generation

Fig. 3. Microwave frequency comb signal with 201.2 kHz interval in cavity length of 1 km. (a) 5 MHz; (b) 1 MHz

Fig. 4. Phase noise measurement of microwave frequency comb

Fig. 5. Line width of microwave frequency comb signal with 201.2 kHz interval in cavity length of 1 km

Fig. 6. Electric pulse signal of microwave frequency comb

Fig. 7. When cavity length is 2 km, measurement of microwave frequency comb phase noise with signal interval of 101.4 kHz

Fig. 8. Microwave frequency comb phase noise measurement at 2.153 MHz with cavity length of 100 m

Fig. 9. Microwave frequency comb signal with signal interval from 201.2 kHz to 1.207 MHz in cavity length of 1 km. (a) 201.2 kHz; (b) 402.4 kHz; (c) 603.6 kHz; (d) 804.8 kHz; (e) 1.006 MHz; (f) 1.207 MHz

Fig. 10. Microwave frequency comb signal with signal interval of 6.87 MHz and 507 kHz. (a) 6.87 MHz; (b) 507 kHz