Effect of the imperfect flat earth on the vertically polarized radiation of a cylindrical reflector antenna

The radiation of a circular cylindrical reflector antenna in the presence o f imperfect flat earth is treated in an accurate manner. The boundary value problem is formulated in terms of a full-wave integral equation converted to the dual-series equations: and then regularized by using analytical inve rsion of the static part. The resulting Fredholm second-kind matrix equatio n is solved numerically with guaranteed accuracy. The feed directivity is i ncluded in the analysis by using the complex source-point method, Various a ntenna features, which include the overall directivity, efficiency, gain, a nd radiated and absorbed power fractions have been calculated and compared with the free-space antenna characteristics. They show some phenomena not p redicted by approximate techniques.