Analysis of slot antenna on dielectric substrate

A simple method is described for analysis of a slot antenna on dielectric substrate of finite thickness. The method consists in using several transformations for reducing the original structure to approximately complementary/dual structure; i.e., to a cylindrical dipole of circular cross-section with a coaxial magnetic cover. The structure thus obtained is then analyzed using well-known methods. A model of the slot on dielectric substrate fed by a coplanar waveguide was realized, and experimental results for slot impedance agreed well with theory.