The modelling of a Yagi-Uda array antenna using the DGF-FDTD method

摘要

A new discrete Green's function formulation of the finite difference time domain (DGF-FDTD) method has been developed which expresses the field response as a convolution of the current sources and the impulse response (which is referred to as the discrete Green's function) of the FDTD equation system. DGF-FDTD avoids the need for computation of free space nodes and absorbing boundary conditions. The method has been demonstrated by its application to a simple Yagi-Uda antenna with an efficiency comparable to the method of moments, which most of the time domain methods lack.