Photonic radar is a technique by which radar may be produced and analysed with the help of photonics rather than traditional RF engineering techniques. The frequency of the radar is still in the RF, but lasers are used to create and analyse the RF signals with high precision.[1]
Diagramm of operation of a photonic radar.
China, Russia and India have active research programs to equip fighter aircraft with photonic radar.[2][3] The potential benefits are longer range of detection, better position sensing, and 3D model target reconstruction.[4]
In one study, a test device could resolve objects as small as 3 x 4 cm (1.2 x 1.6 in), much smaller than traditional radar.[5]
Overview of operationEdit
A laser diode is used to generate an optical signal that is modulated by a linearly-chirped low frequency signal. This modulated optical signal is then split, with one part immediately converted to an electronic signal at 4 times the frequency of the original modulating signal. This waveform is then amplified, emitted via a standard antenna, and then received again via another standard antenna. The second half of the modulated optical signal is further modulated by the reflected signal, and then converted to an electronic signal. This electronic signal is sent through a low-pass filter and finally digitized via an analog-to-digital converter. The resulting digital waveform can be processed to recover the delay between the transmitted and reflected signal, and thus the distance to the target. The entire system may be operated in real-time to allow high-speed target acquisition.[1]
ApplicationsEdit
Novel potential applications include non-invasive patient vital sign monitoring using a photonic chip small enough to include in a phone.[5]
ReferencesEdit
^ abZhang, Fangzheng; Guo, Qingshui; Pan, Shilong (2017-10-23). "Photonics-based real-time ultra-high-range-resolution radar with broadband signal generation and processing". Scientific Reports. 7 (1): 13848. Bibcode:2017NatSR...713848Z. doi:10.1038/s41598-017-14306-y. ISSN 2045-2322. PMC5653754. PMID 29062093.
^Majumdar, Dave (2018-08-11). "Russia's Next Fighter Might Have a New Way to Shoot Down F-22s and F-35s". The National Interest. Retrieved 2018-08-12.
^"Russia's 6th-generation fighter jet to get lasers capable of burning missile homing heads". TASS (in Russian). Retrieved 2018-08-12.
^ abIrving, Michael (2022-02-08). "Advanced photonic radar captures images down to the centimeter scale". New Atlas. Retrieved 2022-02-10.
September 02, 2023
photonic, radar, visible, spectrum, range, finding, lidar, technique, which, radar, produced, analysed, with, help, photonics, rather, than, traditional, engineering, techniques, frequency, radar, still, lasers, used, create, analyse, signals, with, high, prec. For visible spectrum range finding see Lidar Photonic radar is a technique by which radar may be produced and analysed with the help of photonics rather than traditional RF engineering techniques The frequency of the radar is still in the RF but lasers are used to create and analyse the RF signals with high precision 1 Diagramm of operation of a photonic radar China Russia and India have active research programs to equip fighter aircraft with photonic radar 2 3 The potential benefits are longer range of detection better position sensing and 3D model target reconstruction 4 In one study a test device could resolve objects as small as 3 x 4 cm 1 2 x 1 6 in much smaller than traditional radar 5 Overview of operation EditA laser diode is used to generate an optical signal that is modulated by a linearly chirped low frequency signal This modulated optical signal is then split with one part immediately converted to an electronic signal at 4 times the frequency of the original modulating signal This waveform is then amplified emitted via a standard antenna and then received again via another standard antenna The second half of the modulated optical signal is further modulated by the reflected signal and then converted to an electronic signal This electronic signal is sent through a low pass filter and finally digitized via an analog to digital converter The resulting digital waveform can be processed to recover the delay between the transmitted and reflected signal and thus the distance to the target The entire system may be operated in real time to allow high speed target acquisition 1 Applications EditNovel potential applications include non invasive patient vital sign monitoring using a photonic chip small enough to include in a phone 5 References Edit a b Zhang Fangzheng Guo Qingshui Pan Shilong 2017 10 23 Photonics based real time ultra high range resolution radar with broadband signal generation and processing Scientific Reports 7 1 13848 Bibcode 2017NatSR 713848Z doi 10 1038 s41598 017 14306 y ISSN 2045 2322 PMC 5653754 PMID 29062093 https www indiandefensenews in 2022 11 drdo advancing photonic radar html Majumdar Dave 2018 08 11 Russia s Next Fighter Might Have a New Way to Shoot Down F 22s and F 35s The National Interest Retrieved 2018 08 12 Russia s 6th generation fighter jet to get lasers capable of burning missile homing heads TASS in Russian Retrieved 2018 08 12 a b Irving Michael 2022 02 08 Advanced photonic radar captures images down to the centimeter scale New Atlas Retrieved 2022 02 10 Retrieved from https en wikipedia org w index php title Photonic radar amp oldid 1171481875, wikipedia, wiki, book, books, library,
