volume | PIER Journals

Abstract

In this paper, we study in detail both the trapped surface wave and lateral wave excited by a dipole antenna parallel to the plane boundaries of a three-layered region in spherical coordinate. An approximate formula is obtained for the solution of the electrictype pole equation when a condition is satisfied by √k²₁-k²₀l≤0.6. Similarly, an approximate formula is obtained for the solution of the magnetic-type pole equation when a condition is satisfied by √ k²₁-k²₀l-π/2≤1. Furthermore, because of its useful applications in microstrip antenna, the radiation patterns of a patch antenna with specific current distributions are treated specifically. Analysis and computations are carried out in several typical cases. It is seen that, for the component E_0Θ, the total field is determined primarily by the trapped surface wave of electric type, and, for the component E_0Φ, the total field is determined primarily by the trapped surface wave of magnetic type.

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Dr. Liang Liu

Prof. Kai Li

Dr. Yi Hui Xu