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含三维复杂工程细缝金属腔的电磁屏蔽效能评估

Evaluation of electromagnetic shielding effectiveness for metallic enclosure with three-dimensional complex thin slots

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摘要

复杂工程细缝为金属腔电磁屏蔽效能的评估带来了挑战。采用时域有限差分(FDTD)法结合环路(CP)法,在不改变原有粗网格剖分的基础上,实现了对三维复杂细缝结构金属腔电磁屏蔽效能的快速计算。提出复杂工程细缝的等效模型,提高了复杂细缝结构的CP编程和计算效率,计算结果与采用精细网格剖分的传统FDTD(fine-FDTD)计算结果吻合很好,验证了等效模型的有效性。在此基础上,分析了两种开有典型工程细缝金属腔在0~3 GHz内的电磁屏蔽效能,计算结果与fine-FDTD算法结果吻合很好,且计算效率大大提高。

Abstract

Thin slots with complex configurations used in practical engineering make the evaluation of electromagnetic shielding effectiveness(SE) for metallic enclosure increasingly challenging. The contour path (CP) method is adopted to deal with the complex thin slots in order to keep the coarse gridding in FDTD programming. An equivalent model with simple configuration is presented to replace the complex nested slits, and as a result, the programming and calculation efficiency of the CP-FDTD method is improved when dealing with thin slots with complex configurations. The equivalent model and CP-FDTD are used to calculate the SE of metallic enclosure with two typical kinds of thin slot configurations at the wide frequency range respectively. Results are in good agreements with those obtained by using fine-gridded FDTD, and high calculation efficiency is achieved at the same time.

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中图分类号:O441.4

DOI:10.11884/hplpb201830.180047

所属栏目:复杂电磁环境

基金项目:国家自然科学基金委员会-中国工程物理研究院联合基金项目(NSAF-U1530143)

收稿日期:2018-01-30

修改稿日期:2018-04-02

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作者单位    点击查看

方明江:四川大学 电子信息学院, 成都 610065
刘 强:北京应用物理与计算数学研究所, 北京 100088
闫丽萍:四川大学 电子信息学院, 成都 610065
赵 翔:四川大学 电子信息学院, 成都 610065
周海京:北京应用物理与计算数学研究所, 北京 100088

联系人作者:方明江(fangmingjiang@outlook.com)

备注:方明江( 1992-),男,硕士,研究方向为电磁兼容。

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引用该论文

Fang Mingjiang,Liu Qiang,Yan Liping,Zhao Xiang,Zhou Haijing. Evaluation of electromagnetic shielding effectiveness for metallic enclosure with three-dimensional complex thin slots[J]. High Power Laser and Particle Beams, 2018, 30(7): 073201

方明江,刘 强,闫丽萍,赵 翔,周海京. 含三维复杂工程细缝金属腔的电磁屏蔽效能评估[J]. 强激光与粒子束, 2018, 30(7): 073201

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