Comparison of several hybrid methods in analyzing Sierpinksi gasket antennas with finite ground

The integral equation method is historically the most appropriate computational method for solving radiation problems. By using this method for analyzing Sierpinski gasket antennas with finite ground, the computer memory requirements and computational time increase prohibitively. Application of hybrid methods based on combination of the integral equation method and physical optics or uniform geometrical theory of diffraction offer computationally less intensive options. Comparisons in efforts and accuracy of these methods are given. Measurements are also made to verify the numerical results.