FDTD analysis of printed monopole antenna

This paper presents FDTD analysis of a printed monopole antenna to give the guiding principle for the numerical simulation. As a result of the parameter study, the minimum number of cells is 10 for a distance between the absorbing boundary and the antenna for any ground plane size, whose guideline is very efficient to reduce the computing resource in FDTD calculations. When we used very fine grids, no difference of calculated results can be seen for both the sub-cellular technique and the stair-stepped approximation to modeling of taper shape at feeding point. Moreover, the taper length changes the reactance component of the input impedance of the printed monopole antenna