Fig. 1. Internal structure of IQ-COSA^[11]

Fig. 2. Simplified block diagram of COSA simulation. (a) RBW-COSA; (b) IQ-COSA

Fig. 3. COSA power accuracy versus phase noise. (a) IQ-COSA and RBW-COSA; (b) IQ-COSA with different phase deviations

Fig. 4. Experimental setup for COSA

Fig. 5. SUT reconstructed by IQ-COSA and RBW-COSA at different LO sweeping rates. (a) 1 nm/s; (b) 40 nm/s; （c） 80 nm/s； （d） 100 nm/s； （e） 150 nm/s； （f） 200 nm/s