Scattering analysis of conducting bodies of revolution using fictitious currents and point-matching

In this paper, a fictitious current model using point-matching is introduced for the electromagnetic scattering problem of a conducting body of revolution. To take advantage of the rotational symmetry of a scatterer, test points and source points are assumed to have /spl phi/-dependence of e/sup jn/spl phi// and are grouped into test loops and source loops, respectively. The number of sample points in each loop is determined in proportion to the length of the loop. Thus, the range of orders to be considered in each loop is dependent on the length of the loop. The field components of higher order modes which can arise due to aliasing are removed using appropriate approximations. Since the current sources and the boundary condition testing are of point-form, the numerical evaluation of the matrix elements is simple and fast. Numerical results are compared with other methods, and the numerical efficiencies obtained with this method are discussed. >