Abstract
The radiation properties of a microstrip antenna immersed in an ionized medium have since been studied using potential function technique and linearized hydrodynamic theory. In the present paper, Vector Kirchhoff AnalySis has been used for the study of rectangular microstrip antenna immersed in a plasma media. Expressions for radiated far fields have been obtained using this analysis. The analysis is mathematically precise and is used by reasonably approximating the actual aperture field distributions. The effect of ion sheath in the vicinity of a rectangular microstrip antenna is also discussed.