Application of adaptive integral method to scattering and radiation analysis of arbitrarily shaped planar structures

We apply the adaptive integral method to the scattering and radiation analysis of arbitrarily shaped planar structures in both the free space and the microstrip environment. For the microstrip problems, the discrete complex image method is employed for the efficient computation of the Green's functions. The method retains the advantages of the conjugate gradient FFT method as well as the modeling capability of the triangular subdomains. The resulting diagram has the memory requirements proportional to O(N) and an operation count for the matrix-vector multiplication proportional to O(N log N). Numerical results are presented to demonstrate the efficiency and accuracy of the method.