太赫兹科学与电子信息学报, 2020, 18 (4): 650, 网络出版: 2020-12-25
含复合材料封闭腔电磁屏蔽效能评估
Evaluation of electromagnetic shielding effectiveness for enclosure partially made of composite materials
屏蔽效能 复合材料 亚网格边界条件 Shielding Effectiveness composite materials Subgridding Boundary Condition Finite -Difference Time-Domain method
摘要
复合材料已广泛应用于现代航空航天、汽车和电子等行业。当复合材料用于腔体外层时, 其仅几毫米的厚度为基于时域有限差分 (FDTD)法的电磁屏蔽效能评估带来挑战。本文采用亚网格边界条件 (SGBC)技术, 结合 FDTD方法实现了对含复合材料薄层封闭腔的电磁屏蔽效能快速评估。计算了 3种不同含复合材料薄层封闭腔在 0.1.1 GHz内的电磁屏蔽效能, 并与基于全波分析方法软件的仿真结果进行对比, 二者计算结果吻合良好, 证明了采用该方法在复合材料封闭腔 SE分析方面的有效性。
Abstract
Composite materials have been widely employed in modern aerospace, automotive and electronics industries. However, when the composite material is used as external layer of the enclosure, its thickness of a few millimeters, becomes a big challenge for the evaluation of electromagnetic Shielding Effectiveness(SE) based on the Finite-Difference Time-Domain(FDTD) method. Subgridding Boundary Condition(SGBC) method combined with the FDTD method is applied to tackle this issue. The SE of different enclosures has been analyzed in the frequency range of 0.1-1 GHz. The results obtained by using SGBC-FDTD method are compared to those calculated using software based on full wave analysis, and good agreements are observed.
冯博文, 闫丽萍, 赵翔, 刘强, 孟雪松, 周海京. 含复合材料封闭腔电磁屏蔽效能评估[J]. 太赫兹科学与电子信息学报, 2020, 18(4): 650. FENG Bowen, YAN Liping, ZHAO Xiang, LIU Qiang, MENG Xuesong, ZHOU Haijing. Evaluation of electromagnetic shielding effectiveness for enclosure partially made of composite materials[J]. Journal of terahertz science and electronic information technology, 2020, 18(4): 650.
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