Yunlu Xing, Shangyuan Li, Xiaoxiao Xue, Xiaoping Zheng. High-Frequency Broadband-Distributed Coherent-Aperture Microwave Photonic Imaging Radar[J]. Chinese Journal of Lasers, 2021, 48(15): 1517003
- Chinese Journal of Lasers
- Vol. 48, Issue 15, 1517003 (2021)
Fig. 1. Overall framework of the distributed coherent-aperture microwave photonic imaging radar
Fig. 2. Configuration of the dynamic reconfigurable waveform generation module
![Results of waveform orthogonality[28]. (a)Auto-correlation of y1 and cross-correlation of y1 and y2; (b) detail near the main lobe in Fig. 3(a); (c) auto-correlation of y2 and cross-correlation of y1 and y2; (d) detail near the main lobe in Fig. 3(c)](/Images/icon/loading.gif){kind=icon}
Fig. 3. Results of waveform orthogonality[28]. (a)Auto-correlation of y1 and cross-correlation of y1 and y2; (b) detail near the main lobe in Fig. 3 (a); (c) auto-correlation of y2 and cross-correlation of y1 and y2; (d) detail near the main lobe in Fig. 3 (c)
Fig. 4. Schematic diagram and principle of the proposed optical FrFD receiver front-end. (a) Schematic diagram of the optical FrFD receiver front-end; (b) principle of ghost target elimination
Fig. 5. Experimental setup of optical FrFD receiver front-end
Fig. 6. Experimental results of multiple targets detection[39]. (a) Two corner reflectors placed at different distances; (b) results without ghost target elimination; (c) results with ghost target elimination
Fig. 7. Fiber-optic frequency synchronization network based on phase conjugation. (a) Schematic diagram; (b) spectrum evolution of the phase conjugation
Fig. 8. Frequency synchronization experimental results[53]. (a) Remote station connected by two 10 km SMF spools; (b) remote station connected by a 5 km SMF spool and a 15 km SMF spool
Fig. 9. Fiber-optic time synchronization network based on TFDT. (a) Scheme diagram; (b) principle of TFDT
Fig. 10. Time synchronization experimental results[54]. (a) Time difference fluctuation between the local site and the remote site in different time transfer ways; (b) time stabilities obtained in different time transfer ways
Fig. 11. Experimental setup of the microwave photonic time-frequency synchronization network
Fig. 12. Time-frequency synchronization experimental results[55]. (a) Measured time difference fluctuation of time-frequency signal between the local site and remote sites; (b) frequency stabilities of remote sites; (c) time stabilities of remote sites
Fig. 13. Photographs of the experimental scene. (a) Photograph of the radar transceiver; (b) photograph of the antennas and the target
Fig. 14. ISAR imaging results of rotation platform[56]. (a)(c) Monostatic mode of radar 1 and radar 2; (b)(d) coherence-on-transmit mode of radar 1 and radar 2; (e) full coherence mode
Fig. 15. Experimental setup and experimental scene[57]. (a) Experiment setup;(b) experimental scene
Fig. 16. Imaging results of reflectors in different modes[57]. (a) Monostatic mode; (b) coherence-on-transmit mode; (c) full coherence mode
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