A finite element time domain analysis of a broad frequency band antenna

Abstract

In electromagnetic wave propagation problems, it is usually necessary to compute the fields quantities over a broad frequency band. For such an nalysis a 3D time domain finite element approach provides an efficient approach. [1]. Such a model was developed in [2] in the context of microwaves cavities. The method solves the time-dependent vector wave equation and is based on tetrahedral edge elements for the electric filed interpolation. A Newmark scheme is used to approximate the time derivatives. The paper extends the work of [2] for antenna problems. The ability of the model is demonstrated in the case of a loop antenna for which the impedance is obtained as a function of frequency.