低发射率涂层与超材料吸波体兼容性能的研究
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摘要
采用添加炭黑阻抗匹配层的方法提高(8～14)μm波段低发射率涂层与超材料吸波体的兼容性。发射率由IR-2型发射率测试仪测试,用弓形法测量添加炭黑阻抗匹配层前后,低发射率涂料与超材料吸波体复合结构在(2～18)GHz频段的反射率损耗曲线。结果表明:涂覆低发射率涂层对超材料吸波体的吸波性能影响较大,(2～18)GHz频段的平均反射损耗衰减5.81 dB;-10 dB吸波带宽缩短4.2 GHz。在低发射率涂层与超材料基板之间添加炭黑匹配层后,复合涂层的发射率基本保持不变,但是提高了涂层与超材料的兼容性能,涂覆后(2～18)GHz频段的平均反射损耗仅减少2.16dB;-10 dB带宽仅减少3.16 GHz。
The compatibility of the low emissivity coatings in the wave band from 8 μm to 14 μm with the metamaterials was improved by adding a carbon black impedance matching layer. The coating emissivity in the band from 8 μm to 14 μm was measured by IR?2. The reflection loss curves of the composite coatings in the frequency range from 2 GHz to 18 GHz were tested by the NRL?arc method before and after the addition of the carbon black impedance matching layer. The results of experimental investigation indicate that low emissivity coatings have a great impact on metamaterial absorbers. The average reflection loss in the(2-18)GHz band is reduced by 5.81 dB. The-10 dB bandwidth is shortened by 4.2 GHz. After the carbon black matching layer being added between the low emissivity coating and the metamaterial substrate,the emissivity of the composite coating remains substantially unchanged,but the compatibility is improved. The average reflection loss is reduced by 2.16 dB. The-10 dB absorbing bandwidth is reduced by 3.16 GHz.
The compatibility of the low emissivity coatings in the wave band from 8 μm to 14 μm with the metamaterials was improved by adding a carbon black impedance matching layer. The coating emissivity in the band from 8 μm to 14 μm was measured by IR?2. The reflection loss curves of the composite coatings in the frequency range from 2 GHz to 18 GHz were tested by the NRL?arc method before and after the addition of the carbon black impedance matching layer. The results of experimental investigation indicate that low emissivity coatings have a great impact on metamaterial absorbers. The average reflection loss in the(2-18)GHz band is reduced by 5.81 dB. The-10 dB bandwidth is shortened by 4.2 GHz. After the carbon black matching layer being added between the low emissivity coating and the metamaterial substrate,the emissivity of the composite coating remains substantially unchanged,but the compatibility is improved. The average reflection loss is reduced by 2.16 dB. The-10 dB absorbing bandwidth is reduced by 3.16 GHz.
引文
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[3]白天,王秀兰.隐身材料的现状及发展趋势[J].宇航材料工艺,2015,45(6):8-10.
[4]李凤雷.低发射率材料及其与雷达吸波材料的兼容性研究[D].南京:南京航空航天大学,2010.
[5]宋新波,吕雪艳,章建军.飞机红外隐身技术研究[J].激光与红外,2012,42(1):3-7.
[6]张伟钢,薛连海,刘羽熙,等.耐温型近红外低反射与8~14μm低发射率兼容涂层的制备及性能表征[J].复合材料学报,2017,34(3):508-514.
[7]LIUYahong,GUShuai,LUOChunrong,etal.Ultra?thinbroadband metamaterial absorber[J]. Applied Physics A,2012,108(1):19-24.
[8]YU Ze,LU Guizhen. An ultra?thin and broadband absorber us?ing slotted metal loop with multi layers[J]. Optik?International Journal for Light and Electron Optics,2016,127(1):381-389.
[9]LAN Juan,LI Yifeng,YU Huiyang,et al. Nonlinear effects in acoustic metamaterial based on a cylindrical pipe with ordered Helmholtz resonators[J]. Physics Letters A,2017,381(13):1111-1117.
[10]GU Shuai,SU Bin,ZHAO Xiaopeng. Planar isotropic broad?band metamaterial absorber[J]. Journal of Applied Physics,2013,114(16):3702.
[11]梁娟,徐国跃,郭腾超,等.影响低发射率涂层与超材料吸波体兼容的关键因素探究[J].红外技术,2018,40(1):14-19.
[12]沈熙宁.电磁场与电磁波[M].北京:科学出版社,2006:289-297.