NUMERICAL-ANALYSIS OF ELLIPTIC REFLECTOR RADIATING INTO LOSSY DIELECTRIC HALF-SPACE

Numerical analysis of an elliptic reflector above a lossy dielectric h alf-space is presented. The equivalence principle is used in of the co mbined-field surface integral equations for the currents on the reflec tor and air-to-lossy-half-space interface. An approximate model for th e equivalent electric and magnetic currents on the interface is used t o calculate the fields inside the lossy half-space. The numerical resu lts show that the lossy half-space is an effective tool for focusing t he radiated beam; especially in the shallow region, even for high valu es of the lossy permittivity.