Method of moments analysis of an axisymmetric chiral radome

Abstract

An axisymmetric chiral radome has been analyzed numerically by using the method of moments. The chiral body is illuminated by a plane wave and the surface equivalence principle is used to replace the body by equivalent electric and magnetic surface currents. The scattered field outside and the total internal field are produced by these equivalent currents. By using the boundary conditions on the surfaces of the body, eight simultaneous surface integral equations are obtained for four unknown equivalent surface currents. These eight equations are reduced to four by taking linear combinations of them. A Matlab computer program is developed for an axisymmetric chiral radome and examples of numerical calculations are given for a chiral spherical radome and chiral Von Karman radome. Numerical results of the chiral spherical radome are in excellent agreement with the exact ones obtained by the eigenfunction solution.