Abstract

Integral equation modeling of electromagnetic radiation and interference phenomena in planar circuits and antennas offers exact solutions usually at the cost of excessive computation time, especially when arbitrary 3D conducting surfaces are involved. However, we will restrict the geometry to the 2.5D case : this assumes that only horizontal current sheets parallel to the layer structure and vertical conducting surfaces normal to the dielectric layers are allowed. This case does nevertheless cover most of the practical problems. The limitation to the 2.5D case allows to perform more analytical work. A hybrid dyadic-mixed potential representation of the field is proposed as a viable alternative to the traditional ‘total’ mixed potential representations. Severalexamples show the validity of the proposed approach.