An analytical formulation is developed for an axial slot on an infinitely long conducting circular cylinder eccentrically coated with dielectric and partially embedded in a ground plane. A computer program has been developed based on the resulting formulation. The problem is highly significant since the ground plane could be the body of an aircraft, a ship, or any other mobile system. The effect of the ground plane can be used to enhance the radiation characteristics in some cases. It is also a support for the antenna instead of using other mechanical mounting supporting system. Numerical results for different antenna configurations are illustrated. The results show that how one may shape the pattern by offsetting the slotted cylinder from the center of the dielectric coating.
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