| 引用本文: | 魏霖涛,黄大庆,周卓辉,程红飞,赵懿.低电导率超材料的吸波性能研究[J].材料科学与工艺,2019,27(3):23-28.DOI:10.11951/j.issn.1005-0299.20180088. |
| WEI Lintao,HUANG Daqing,ZHOU Zhuohui,CHENG Hongfei,ZHAO Yi.Radar absorbing properties of meta-materials with low electric conductivity[J].Materials Science and Technology,2019,27(3):23-28.DOI:10.11951/j.issn.1005-0299.20180088. |
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| 摘要: |
| 本文研究了由低电导率材料制备的超材料的吸波性能，通过仿真软件计算了不同电导率超材料吸波性能，研究了其变化规律，在复合材料基材上采用喷涂法制备了电导率为2.3×104 S/M的超材料结构，探究了不同基板厚度时超材料吸波体的吸波性能变化规律.仿真结果表明，低电导率材料在一定基材厚度下可以实现电磁波的高吸收，并且基材的厚度有最优值，这说明电导率也可以成为设计超材料的参数.制备的超材料基底材料厚度为2 mm时，其在7.8 GHz处实现了-23.2 dB的深吸收，实验规律与仿真结果相吻合.采用喷涂法有助于解决超材料在大曲率、复杂外形等部位难以应用的问题，为超材料的制备以及其大规模应用开辟了一个新的方向. |
| 关键词: 低电导率 超材料 导电银浆 吸波材料 喷涂法 |
| DOI：10.11951/j.issn.1005-0299.20180088 |
| 分类号:O441.4 |
| 文献标识码:A |
| 基金项目:中央高校基本科研业务费专项资金资助(WK2090050018). |
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| Radar absorbing properties of meta-materials with low electric conductivity |
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WEI Lintao, HUANG Daqing, ZHOU Zhuohui, CHENG Hongfei, ZHAO Yi
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(Stealth Materials and Coating Lab, Beijing Institute of Aeronautical Materials, Beijing 100095, China)
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| Abstract: |
| The absorbing properties of meta-materials prepared by low electric conductivity materials are studied in this paper. The simulation method was adopted to calculate the absorbing properties of meta-materials with different electric conductive rates, and the corresponding principle was studied. A meta-material structure with a conductivity of 2.3×104 S/M was processed through spray coating on the composite substrate. The radar absorbing properties of absorbers at different substrate thicknesses were investigated. Simulation results indicate that meta-materials with low electric conductivity can realize deep and wide absorption on electrical magnetic wave and the optimal thickness value of the substrate can be obtained, suggesting that conductivity can be another parameter for the design of meta-materials. When the thickness of the prepared meta-material substrate was 2 mm, a deep absorption of -23.2 dB was achieved at 7.8 GHz, and the experimental principle was in accordance with simulation results. The spraying method can be expected to solve the problem of meta-materials application in areas with large curvature, complex shapes, and so on, which opens up a new direction of meta-materials design and fabrication in large scale. |
| Key words: low electric conductivity meta-materials conductive silver paste radar absorbing material spraying method |
