时域有限差分法在天线辐射可视化中的应用研究  

Application and Research of Finite-Different Time-Domain Method in Visual Radiation Analysis of Antenna

作　　者：李戈阳[1] 赵复政[1] 

机构地区：[1]中国舰船研究设计中心,武汉430064

出　　处：《舰船电子工程》2010年第8期81-84,共4页Ship Electronic Engineering

摘　　要：针对常见的舰载单极套筒天线,利用时域有限差分法(FDTD)对仿真空间进行了Yee网格划分,并建立了该天线的数理模型。在工作频率为30MHz时,对天线进行了可视化仿真,通过对天线表面电流的幅度与相位进行分析,验证了模型的正确性以及计算的精确性;同时,利用天线辐射相位分布图直观地分析了天线的辐射过程。仿真结果表明,针对舰载单极套筒天线的FDTD建模方法对舰载天线的辐射分析与工程设计具有一定的指导意义。Monopole sleeve antenna is one of the most typical shipboard antennas.Based on division concept of Yee cell in FDTD（Finite Difference Time Domain） method,mathematic and physical model of monopole sleeve antenna is constructed.At the working frequency of 30MHz,visual simulation is implemented.By analyzing the amplitude and phase of surface current on antenna,the validity of model and the accuracy of computation are verified.The process of radiation is also visually analyzed based on the phase distribution of antenna in the whole simulation area.Simulation results show that the FDTD modeling method for shipboard monopole sleeve antenna is of certain significance to the radiation analysis,design and application of shipboard antennas.

关 键 词：单极套筒天线 舰载天线 数理模型 时域有限差分法 表面电流 

分 类 号：TN82[电子电信—信息与通信工程]