Approximate expressions for horizontal electric dipole (HED) quasi-static range propagation within a conducting slab


  • Peter R. Bannister,

  • Rene L. Dube


Approximate expressions for the ac quasi-static fields produced by a horizontal electric dipole (HED) antenna located within a conducting slab have been derived by employing finitely conducting earth image theory techniques. Asymptotic results have also been obtained by applying the quasi-near approximation to the basic Sommerfeld integrals. The resulting approximations agree with previously derived numerical integration results. The resulting expressions are particularly applicable to short-range electromagnetic propagation in a shallow sea.