Ka-band microwave photonic ultra-wideband imaging radar for capturing quantitative target information
| Autor: | Wenshan Cong, Xiong Luo, Pengfei Du, Jianghai Wo, Jin Zhang, Anle Wang, Jiangqiao Lan, Biao Zhao, Yong Zhu, Lan Yu, Junkai Zhang, Yalan Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Synthetic aperture radar business.industry Transmitter Ultra-wideband 02 engineering and technology Atomic and Molecular Physics and Optics law.invention Inverse synthetic aperture radar 020210 optoelectronics & photonics Optics Microwave imaging law Radar imaging 0202 electrical engineering electronic engineering information engineering Radar business Microwave |
| Zdroj: | Optics express. 26(16) |
| ISSN: | 1094-4087 |
| Popis: | Extracting precise target characteristics from microwave image is needed and calls for high-resolution microwave imaging radar systems. In this paper, a Ka-band ultra-wideband microwave photonic (MWP) imaging radar is developed and experimentally demonstrated. In the transmitter, continuous ultra-wideband linear frequency modulation (LFM) wave is generated based on optical frequency sextupling technique. In the receiver, a combination of optical frequency mixer with fiber delay lines and electric analog-to-digital converter (ADC) is capable of receiving target echoes and imaging targets with different distances. The maximum instantaneous bandwidth of the transmitted waveform is measured to be 10.02 GHz and corresponding range resolution is calibrated to be 1.68 cm. Out-field tests with demonstrator working at synthetic aperture radar (SAR) or inverse synthetic aperture radar (ISAR) mode are carried out. Different targets such as an unmanned aerial vehicle (UAV), airliner and Leifeng pagoda are imaged. Based on corresponding high-resolution microwave images, quantitative information of the targets can be identified, which shows the great potential of the radar demonstrator for various remote sensing applications. |
| Databáze: | OpenAIRE |
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