采用FDTD/FVTD混合算法分析蝶形微带天线

用FDTD和FVTD混合算法分析了蝶形微带天线的反射损失.在适于矩形网格的区域采用常规的非均匀FDTD算法,在微带贴片天线的斜边或PEC弯曲表面处采用FVTD算法,重叠区域的场通过邻近场的线性插值得到.程序仿真和实际测量结果的比较表明在较宽的频带内,该算法在不损失精度,不显著增加CPU时间和内存的情况下,极大地降低了常规FDTD所要求的网格密度.

Analysis of bow-tie microstrip antenna by hybrid FDTD/FVTD algorithm

The reflection loss of bow-tie microstrip antenna are analyzed by using hybrid FDTD and FVTD algorithm. The conventional non-uniform FDTD method is used in regions adapting to rectangular mesh, while FVTD algorithm is applied on the slanted edges of mierostrip patch antennas and curved PEC surface. In the regions where FDTD and FVTD quantities are mutually overlapping, these fields from the respective regions are obtained by using linear interpolating of their neighboring fields. The simulation and measured results show that with little increase of CPU time and memory, the hybrid algorithm greatly reduces the mesh density of conventional FDTD required with the conditions of ensuring the computational accuracy for broad frequency range.