Photonics-based inverse synthetic aperture radar for near-field RCS calculation

Angran Zhao; Sijie Liu; Xiangchuan Wang; Fangzheng Zhang; Shilong Pan

doi:10.1117/12.2550112

12 March 2020 Photonics-based inverse synthetic aperture radar for near-field RCS calculation

Angran Zhao, Sijie Liu, Xiangchuan Wang, Fangzheng Zhang, Shilong Pan

Proceedings Volume 11435, 2019 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing; 114350G (2020) https://doi.org/10.1117/12.2550112
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

A photonics-based inverse synthetic aperture radar (ISAR) for near-field RCS calculation is proposed. The proposed radar implements the function of radar range profile target recognition, 2D ISAR image and near-field RCS calculation. Firstly, a photonics-based ISAR is proposed with a frequency-quadrupled linear frequency-modulated continuous wave (LFMCW) signal covers 18-26 GHz. A 2D ISAR image with 2 cm*2 cm resolution is obtained. Secondly, a method of calculating the RCS from the ISAR image is also proposed. According to the Parseval theorem, by summing the pixel values of target area 2D ISAR image and multiplying by the scaling factor, the mean RCS value of target in the radar working band can be obtained. In the experimental demonstration, the standard metal spheres with diameters of 10 cm, 15 cm and 20 cm are tested 1.2 m away from the radar. The testing results show that the difference between the RCS test value and the theoretical value is less than 1.31 dB.

Citation Download Citation

Angran Zhao, Sijie Liu, Xiangchuan Wang, Fangzheng Zhang, and Shilong Pan "Photonics-based inverse synthetic aperture radar for near-field RCS calculation", Proc. SPIE 11435, 2019 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing, 114350G (12 March 2020); https://doi.org/10.1117/12.2550112

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KEYWORDS

Signal processing

Near field

Radar

Synthetic aperture radar

Digital signal processing

Image processing

Near field optics

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