A broadband photonic analog-to-digital converter（ADC） for X-band radar applications is proposed and experimentally demonstrated. An X-band signal with arbitrary waveform and a bandwidth up to 2 GHz can be synchronou...A broadband photonic analog-to-digital converter（ADC） for X-band radar applications is proposed and experimentally demonstrated. An X-band signal with arbitrary waveform and a bandwidth up to 2 GHz can be synchronously sampled and processed due to the optical sampling structure. In the experiment, the chirp signal centered at 9 GHz with a bandwidth of 1.6 GHz is sampled and down-converted with a signal-to-noise ratio of 7.20 d B and an improved noise figure. Adopting the photonic ADC in the radar receiver and the above signal as the transmitted radar signal, an X-band inverse synthetic aperture radar system is set up, and the range and cross-range resolutions of 9.4 and 8.3 cm are obtained, respectively.展开更多
We demonstrate a novel multifunctional radar receiver scheme based on photonic parametric sampling.The working principle of photonic parametric sampling based on four-wave mixing(FWM)process is presented.To experiment...We demonstrate a novel multifunctional radar receiver scheme based on photonic parametric sampling.The working principle of photonic parametric sampling based on four-wave mixing(FWM)process is presented.To experimentally verify the multifulctional feasibility,the scheme is individually implemented to carry out a four-channel phased array radar reception and a dual-band radar reception.展开更多
基金supported in part by the National Natural Science Foundation of China(NSFC)(Nos.61690191,61690192,61420106003,and 61621064)Chuanxin Funding,and Beijing Natural Science Foundation(No.4172027)
文摘A broadband photonic analog-to-digital converter（ADC） for X-band radar applications is proposed and experimentally demonstrated. An X-band signal with arbitrary waveform and a bandwidth up to 2 GHz can be synchronously sampled and processed due to the optical sampling structure. In the experiment, the chirp signal centered at 9 GHz with a bandwidth of 1.6 GHz is sampled and down-converted with a signal-to-noise ratio of 7.20 d B and an improved noise figure. Adopting the photonic ADC in the radar receiver and the above signal as the transmitted radar signal, an X-band inverse synthetic aperture radar system is set up, and the range and cross-range resolutions of 9.4 and 8.3 cm are obtained, respectively.
基金supported in part by the National Natural Science Foundation of China(Nos.61822508,61571292,and 61535006)。
文摘We demonstrate a novel multifunctional radar receiver scheme based on photonic parametric sampling.The working principle of photonic parametric sampling based on four-wave mixing(FWM)process is presented.To experimentally verify the multifulctional feasibility,the scheme is individually implemented to carry out a four-channel phased array radar reception and a dual-band radar reception.
