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本文提出一种新的芯板电荷分布形式,并借助格林函数和变分公式,对屏蔽带状线进行了空域分析。对芯板位置任意的一般情形,给出了电容、特性阻抗、电位分布和电场分布的解析表达式;与其他方法比较,其数值结果易于实现,精度较高。本文提出的方法,对偏心或对称的横电磁波传输室(TEM cell)特性分析尤为适用。
In this paper, a new form of charge distribution for the core is proposed, and the spatial distribution of the shielded stripline is analyzed by Green’s function and variational formula. The analytical expressions of capacitance, characteristic impedance, potential distribution and electric field distribution are given for any general situation of core plate. Compared with other methods, the numerical results are easy to implement and the precision is high. The proposed method is particularly suitable for the analysis of eccentric or symmetrical TEM cell characteristics.