Comparison of the radiation characteristics calculated using MoM and FDTDM for a printed grid array antenna

A grid array antenna (GAA) printed on a dielectric substrate is analyzed using the finite-difference time-domain method (FDTDM) to validate the method of moments (MoM) results. The GAA is excited by a vertical probe that is connected to the inner conductor of a coaxial line. The radiation characteristics and the computation time using the FDTDM are compared with those using the MoM.