摘要
A broadband instantaneous multi-frequency measurement system based on chirped pulse compression,which potentially has a sub-megahertz(MHz)accuracy and a hundred-gigahertz(GHz)measurement range,is demonstrated.A signalunder-test(SUT)is converted into a carrier-suppressed double-sideband(CS-DSB)signal,which is then combined with an optical linearly frequency-modulated signal having the sweeping range covering the+1 st-order sideband of the CSDSB signal.With photodetection,low-pass filtering,and pulse compression,accurate frequencies of the SUT are obtained via locating the correlation peaks.In the experiment,single-and multi-frequency measurements with a measurement range from 3 to 18 GHz and a measurement accuracy of<±100 MHz are achieved.
作者
Beibei Zhu
Min Xue
Changyuan Yu
Shilong Pan
朱贝贝;薛敏;余长源;潘时龙(Key Laboratory of Radar Imaging and Microwave Photonics,Ministry of Education,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Department of Electronic and Information Engineering,The Hong Kong Polytechnic University,Hong Kong,China)
基金
supported in part by the Postgraduate Research and Practice Innovation Program of Jiangsu Province(No.KYLX16_0367)
the National Natural Science Foundation of China(Nos.62071226 and 61971372)
the Hong Kong Scholar Program(No.G-YZ2S)
HK RGC GRF(No.15200718)。
