An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz
With the emergence of various filtering technologies, the radar jamming efficiency of the technology based on radar cross section is ever lower, therefore cannot meet military requirements. In this context, the jamming technology based on attenuation mechanism has been developed and plays an increas...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023032723 |
| _version_ | 1797815549966680064 |
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| author | Hui-chao Zhang Run-ze Tang Yong-peng Chen Jia-wei Zhu Xiao-xia Ma Zun-ning Zhou |
| author_facet | Hui-chao Zhang Run-ze Tang Yong-peng Chen Jia-wei Zhu Xiao-xia Ma Zun-ning Zhou |
| author_sort | Hui-chao Zhang |
| collection | DOAJ |
| description | With the emergence of various filtering technologies, the radar jamming efficiency of the technology based on radar cross section is ever lower, therefore cannot meet military requirements. In this context, the jamming technology based on attenuation mechanism has been developed and plays an increasingly important role in disturbing radar detecting. Magnetically expanded graphite (MEG) has excellent attenuation efficiency because it can cause dielectric loss as well as magnetic loss. Moreover, MEG features good impedance matching, which makes more incidence of electromagnetic waves into the material; and its multi-layer structure is conducive for electromagnetic wave reflection and absorption. In this work, the structure model of MEG was established by analyzing the layered structure of expanded graphite (EG) and the dispersion of intercalated magnetic particles. The electromagnetic parameters of thus-modeled MEG were calculated based on the equivalent medium theory; and effects of EG size, magnetic particle type and volume fraction on the attenuation performance were studied by the variational method. It is indicated that MEG with 500-μm diameter has the best attenuation effect and the highest increment of absorption cross section appears at 50% volume fraction of the magnetic particles at 2 GHz. The imaginary part of complex permeability of the magnetic material has the most significant influence on the attenuation effect of MEG. This study provides guidance for the design and application of MEG materials in disturbing radar detecting field. |
| first_indexed | 2024-03-13T08:24:30Z |
| format | Article |
| id | doaj.art-13cfd7afd4aa46b2b8a536b446573683 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-13T08:24:30Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-13cfd7afd4aa46b2b8a536b4465736832023-05-31T04:46:30ZengElsevierHeliyon2405-84402023-05-0195e16065An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHzHui-chao Zhang0Run-ze Tang1Yong-peng Chen2Jia-wei Zhu3Xiao-xia Ma4Zun-ning Zhou5State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaBeijing Institute of Electronic System Engineering, Beijing 100854, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaSpecial Ammunition Research Institute, North Hua'an Industry Group Co. Ltd, Qiqihar, 161000, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; Corresponding author.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; Corresponding author.With the emergence of various filtering technologies, the radar jamming efficiency of the technology based on radar cross section is ever lower, therefore cannot meet military requirements. In this context, the jamming technology based on attenuation mechanism has been developed and plays an increasingly important role in disturbing radar detecting. Magnetically expanded graphite (MEG) has excellent attenuation efficiency because it can cause dielectric loss as well as magnetic loss. Moreover, MEG features good impedance matching, which makes more incidence of electromagnetic waves into the material; and its multi-layer structure is conducive for electromagnetic wave reflection and absorption. In this work, the structure model of MEG was established by analyzing the layered structure of expanded graphite (EG) and the dispersion of intercalated magnetic particles. The electromagnetic parameters of thus-modeled MEG were calculated based on the equivalent medium theory; and effects of EG size, magnetic particle type and volume fraction on the attenuation performance were studied by the variational method. It is indicated that MEG with 500-μm diameter has the best attenuation effect and the highest increment of absorption cross section appears at 50% volume fraction of the magnetic particles at 2 GHz. The imaginary part of complex permeability of the magnetic material has the most significant influence on the attenuation effect of MEG. This study provides guidance for the design and application of MEG materials in disturbing radar detecting field.http://www.sciencedirect.com/science/article/pii/S2405844023032723Radar cross sectionElectromagnetic scatteringRadar interferenceEffective medium theoryMagnetically expanded graphite |
| spellingShingle | Hui-chao Zhang Run-ze Tang Yong-peng Chen Jia-wei Zhu Xiao-xia Ma Zun-ning Zhou An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz Heliyon Radar cross section Electromagnetic scattering Radar interference Effective medium theory Magnetically expanded graphite |
| title | An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz |
| title_full | An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz |
| title_fullStr | An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz |
| title_full_unstemmed | An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz |
| title_short | An Innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2–18 GHz |
| title_sort | innovative model of magnetically intercalated expanded graphite for calculating radar attenuation performance at 2 18 ghz |
| topic | Radar cross section Electromagnetic scattering Radar interference Effective medium theory Magnetically expanded graphite |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023032723 |
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