基于BLT方程的电磁干扰建模

为了解决场线耦合下传输线负载端响应问题,基于BLT方程建模思想,利用电磁拓扑概念中的管道和节点概念构建了计算的物理模型;利用场线耦合、传输线理论结合叠加原理推导了线上负载干扰的计算方法;利用辐射场空间传播、传输线散射理论结合叠加原理推导了空间场的计算方法;对节点处的电压方程进行合并、整理得到了类似BLT方程的矩阵方程。计算结果表明,该分析方法不仅可计算传输线负载响应,还可计算空间电磁场。与其它论文计算结果的比较证实其模型、推导、计算的正确性。

Modeling for Electromagnetic Interaction by the BLT Equation

In order to calculate the response on the loads of the transmission line on the condition of field-line coupling,based on the idea of modeling of BLT equation,a physical model for calculating the concept of tubes and nodes of electromagnetic topology is established.The calculating method of the interaction quantities of the load on the line with the field-line coupling,the transmission line theory and the accumulating principle is educed,and the calculating method of the electromagnetic field in the space with the spread in the space of the radiant electromagnetic field,the scatter theory of transmission line,and the accumulating principle is also educed.The voltage equations are combined and coordinated at nodes subsequently to gain a matrix equation like the BLT equation,and an example with the educed results are calculated.The calculated results indicate that the method can calculate not only the response of the load on the transmission line,but also the electromagnetic field in the space.The modeling,educing,and calculating are all proved to be correct after the comparison with the calculating results in previous papers.