一种改进FDTD仿真准确性的等效宽度技术

An Improved Accurate FDTD Simulation Technique Using Relatively Coarse Mesh

提出了一种改进FDTD(Finite Difference Time Domain)仿真结果的等效宽度技术,它通过对仿真对象的尺寸进行加权修正,即使在使用粗网格进行FDTD仿真时也能得到准确的结果.同时对FDTD仿真时节省运算时间和存储空间也具有非常实用的价值.并通过对均匀微带线的特性阻抗和贴片天线、低通滤波器的散射系数的计算验证了这一理论.

In this paper, a fast convergent technique was presented. An improved accurate FDTD （ Finite Difference Time Domain） simulation result could be generated using a relatively coarse mesh for PEC planar structures if an effec- tive factor is properly selected. It is very valuable because the calculating time and space could be decreased when FDTD simulation is done. A microwave patch antenna and a low pass filter were used in this paper to verify the proposed scheme.