A 2-D FINITE ELEMENT MODEL FOR WAVE PROPAGATION INTO ARBITRARY INHOMOGENEOUS MATERIALS

Abstract

A finite element program called FEAST, coded in FORTRAN, provides a frequency domain (sinusoidal steady state) solution to Maxwell's equations in cylindrical coordinates. By imposing a radiation or impedance boundary condition at the far boundary of the finite element mesh, FEAST models the near fields of axially symmetric antennas in arbitrary inhomogeneous materials. The program has been validated by reproducing the driving point impedances and current distributions of several antenna configurations for which theoretical and experimental results are available in the published literature. [Vol. 4, No. 2, pp. 27-48 (l989)]