摘要 该文用时域有限差分法(Finite Difference Time Domain,FDTD)计算介质平面上单极天线的阻抗特性。用FDTD法计算天线的辐射特性可以使用不同的激励方式,文章比较了采用不同激励方式时,天线的输入阻抗。文章的主要内容是将表面阻抗法用于FDTD中,计算架设在介质平面上单极天线的辐射特性,并用FDTD法计算了介质平面上铺设不同尺寸的导体平面时,天线的阻抗特性。
Abstract:In this paper, Finite Difference Time Domain(FDTD) method is used to calculate the radiation characteristics of the antenna located on loss ground. For FDTD method, there are different feed models to calculate the input impendence of antenna. The results calculated by different feed models are compared with each other. The important point of the paper is to calculate the radiation characteristics of monopole on dielectric plane, and analyzes input impedance change with the size change of conducting ground system on the surface of dielectric plane.