Analysis of LPDA Radiation Above a Multilayer

This paper deals with an efficient model for a LPDAs radiating above a layered medium. The frequency domain formulation is based on the set of Pocklington integrodifferential equation. The effects of the earth-air interface are taken into account via the simplified reflection coefficient arising from the Modified Image Theory (MIT). The set of coupled Pocklington equations is solved via the Galerkin-Bubnov scheme of the Indirect Boundary Element Method (GB-IBEM). The related reflected field is numerically evaluated via BEM formalism, as well. Some illustrative computational examples for the far-field pattern above a multilayer are presented.