δ-函数源对有限元计算线天线电流分布的影响

Effect of the Delta-Function Generator on Finite Element Calculations of Current Distributions on Wire Antennas

本文以圆柱天线为计算对象,通过数值验证,分析研究δ-函数源对有限元计算线天线电流分布的影响.分析表明,馈点电流虚部随剖分疏密变化很大,特别是当δ-函数源位于计算区域端部时,这种现象更为明显.由此总结出可供借鉴的数值计算经验.

The effect of the delta-function generator on finite element calculations of current distributions on wire antennas is investigated by means of analysis of the current distribution on a cylindrical antenna. Comparisons of calculated results show that the imaginary part of the current at the driving point varies quickly with the different division number, especially, when the delta-function generator is located at the end of the computational region.