Attenuation characteristics of electromagnetic waves in plasma generated by coating radionuclide on surface structures
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Attenuation characteristics of electromagnetic waves in plasma generated by coating radionuclide on surface structures Sheng Lai1 • Xiao-Bin Tang1,2 Yun-Peng Liu1,2
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Jun-Xu Mu1 • Zhao-Peng Feng1
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Received: 19 April 2020 / Revised: 14 June 2020 / Accepted: 18 June 2020 China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society and Springer Nature Singapore Pte Ltd. 2020
Abstract Stealth technology plays an important role in modern military conflicts, especially when used in fighter jets. Since airfoil structures have a leading edge, inlet, and surface bulge that are easily detected by radar, it is necessary to study the stealth of these structures. In this study, we investigate structures coated with radionuclides to generate plasma. Using simulation and calculation methods, the attenuation of 0.1–10 GHz electromagnetic waves propagating in plasma was studied. The results showed that the attenuation of low-frequency electromagnetic waves is greater than that of high-frequency electromagnetic waves. The attenuation of 0.1–1 GHz electromagnetic waves is found to be less than - 2.7 dB, - 3.0 dB, and - 15.6 dB at the airfoil leading edge, inlet, and surface bulge structures, respectively. We also found that the attenuation of electromagnetic waves with 0-incidence is greater than that of waves with 10, 20, and 30 incidence angles. Additionally, the attenuation of electromagnetic waves decreases gradually as the incident angle increases. Keywords Plasma stealth Radionuclide coating Electromagnetic waves Numerical simulation
& Xiao-Bin Tang [email protected] 1
Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
Key Laboratory of Nuclear Technology Application and Radiation Protection in Astronautics, Ministry of Industry and Information Technology, Nanjing 210016, China
1 Introduction At present, many countries have conducted extensive research on stealth technology, including RF stealth and optical stealth, which can be applied to advanced fighter jets [1–7]. Previous studies have shown that an airfoil leading edge, inlet, and surface bulge are easily detected by radar [8]. Therefore, it is necessary to investigate the stealth properties of these wing regions, including shape structure, radar jamming, and material stealth properties. Shape-structure stealth refers to the fighter jet surface, which is as parallel to the horizontal direction as possible for reducing the reflection of enemy radar electromagnetic waves. This results in an optimal smooth cone structure. Radar-jamming stealth refers to the proactive transmission of electromagnetic waves, by the fighter aircraft, with jamming characteristics determined after detecting and analyzing electromagnetic waves from enemy radar. This makes the enemy unable to obtain accurate information about fighter jet [9]. Material stealth refers to
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