FDTD分析准八木天线的算法实现

介绍时域有限差分（FDTD）法计算准八木天线驻波比的算法实现方法。文中利用模型描述文件对天线进行了建模和网格划分;将各向异性完全匹配层（UPML）吸收边界分区编写,并利用区域的对称性简化了程序;采用带内阻的电压源作为激励源;最后从总电压中分离出入射电压和反射电压,得到了准八木天线的驻波比。实际制作了一个准八木天线并进行了测试,计算结果与实测结果基本一致,表明该实现方法是正确和有效的。

Programming analysis of the quasi-Yagi antenna by using FDTD method

The Finite Difference Time Domain（FDTD） method was used to calculate the Voltage Standing Wave Ratio（VSWR） of a quasi-Yagi antenna.The model of the antenna was created and the mesh was generated by using model describing file.To simplify the calculating program,a Uniaxial anisotropic Perfectly Matched Layer（UPML） region was divided into six sub-regions and sub-regional symmetry was taken into account.The voltage source with lumped resistance was as excitation in the program.At last,VSWR was obtained by separating input voltage from total.A prototype quasi-Yagi antenna was fabricated and measured.The simulation result approximated to the measurement result,which proved the method had been correct.