Broadband photonic ADC for microwave photonics-based radar receiver

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2018,（6）
• 页码范围: 39-43
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201816.060605

摘要

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 dB 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.