Modeling Electromagnetic Emissions From Printed Circuit Boards in Closed Environments Using Equivalent Dipoles
Modeling Electromagnetic Emissions From Printed Circuit Boards in Closed Environments Using Equivalent Dipoles
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DOI：
10.1109/temc.2010.2044181
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发表时间：
2010-03
影响因子：
2.1
通讯作者：
Xin Tong;David W. P. Thomas;A. Nothofer;P. Sewell;C. Christopoulos
中科院分区：
文献类型：
--
作者：
Xin Tong;David W. P. Thomas;A. Nothofer;P. Sewell;C. Christopoulos
本文提出了一种基于近场扫描的等效偶极子模型来描述印刷电路板（PCB）电磁辐射的方法。基本思想是用一组产生相同辐射场的无穷小偶极子代替PCB。等效偶极子的参数通过直接拟合到测量的磁近场来确定。在封闭环境仿真中，等效方法扩展到偶极-电介质导电平面模型，通过包括PCB的基本物理特征来考虑PCB和外壳之间的相互作用。电磁辐射可以通过数值方法求解等效模型来预测，从而大大减少了仿真时间和存储成本。一个基本的测试板和一个更复杂的实际遥测PCB在不同的配置建模，并与测量和全场仿真进行比较，证实了该模型的有效性和效率。
In this paper, a method for representing electromagnetic emissions from a printed circuit board (PCB) using an equivalent dipole model deduced from near-field scanning is proposed. The basic idea is to replace the PCB with a set of infinitesimal dipoles that generate the same radiated fields. Parameters of the equivalent dipoles are determined by directly fitting to the measured magnetic near fields. In closed-environment simulations, the equivalent method is extended to a dipole-dielectric conducting plane model to account for the interactions between the PCB and enclosure by including the basic physical features of the PCB. The electromagnetic emissions can then be predicted by solving the equivalent model with numerical methods, thereby, significantly reducing the simulation time and storage costs. A basic test board and a more complex practical telemetry PCB are modeled in different configurations and compared with measurements and full-field simulations, confirming the validity and efficiency of the model.