钟工 Wave Optics (波威) 11/28/2018:
Demonstration of a microwave photonic syn- thetic aperture radar based on photonic- assisted signal generation and stretch processing.
RUOMING LI, WANGZHE LI,* MANLAI DING, ZHILEI WEN, YANLEI LI, LIANGJIANG ZHOU, SONGSHAN YU,TONGHE XING, BOWEI GAO, YUCHEN LUAN, YONGTAO ZHU, PENG GUO, YU TIAN, AND XINGDONG LIANG
National Key Lab of Microwave Imaging Technology, Institute of Electronics Chinese Academy of Sci- ences, Beijing, 100190, China
Abstract: A microwave photonic synthetic aperture radar (MWP SAR) is developed and ex- perimentally demonstrated. In the transmitter, microwave photonic frequency doubling is used to generate a linearly-frequency-modulated (LFM) radar signal; while in the receiver, photonic stretch processing is employed to receive the reflection signal. The presented MWP SAR operates in Ku band with a bandwidth of 600MHz, and is evaluated through a series of inverse SAR imaging tests both in a microwave anechoic chamber and in a field trial. Its im- aging performance verifies that the proposed MWP SAR works perfect and shows the poten- tial of overcoming the conventional radar bandwidth bottleneck.
3. Experimental results and discussion
The output of the customized Pol-demux coherent receiver (Discovery Semiconductors DSC-R413-W-C) is sent to an ADC with a sampling rate of 100 MS/s and a resolution of 16 bits. The noise level of the radar receiver is determined by the noise of the coherent receiver, which is recorded as −143.8dBm/Hz, and the SFDR is measured as 40 dB
Demonstration of a microwave photonic syn- thetic aperture radar based on photonic- assisted signal generation and stretch processing.
RUOMING LI, WANGZHE LI,* MANLAI DING, ZHILEI WEN, YANLEI LI, LIANGJIANG ZHOU, SONGSHAN YU,TONGHE XING, BOWEI GAO, YUCHEN LUAN, YONGTAO ZHU, PENG GUO, YU TIAN, AND XINGDONG LIANG
National Key Lab of Microwave Imaging Technology, Institute of Electronics Chinese Academy of Sci- ences, Beijing, 100190, China
Abstract: A microwave photonic synthetic aperture radar (MWP SAR) is developed and ex- perimentally demonstrated. In the transmitter, microwave photonic frequency doubling is used to generate a linearly-frequency-modulated (LFM) radar signal; while in the receiver, photonic stretch processing is employed to receive the reflection signal. The presented MWP SAR operates in Ku band with a bandwidth of 600MHz, and is evaluated through a series of inverse SAR imaging tests both in a microwave anechoic chamber and in a field trial. Its im- aging performance verifies that the proposed MWP SAR works perfect and shows the poten- tial of overcoming the conventional radar bandwidth bottleneck.
3. Experimental results and discussion
The output of the customized Pol-demux coherent receiver (Discovery Semiconductors DSC-R413-W-C) is sent to an ADC with a sampling rate of 100 MS/s and a resolution of 16 bits. The noise level of the radar receiver is determined by the noise of the coherent receiver, which is recorded as −143.8dBm/Hz, and the SFDR is measured as 40 dB
