Fast integral equation method for metasurface antennas

In this paper, we describe an efficient method for the full-wave simulation of printed antennas based on metasurfaces whose texturing is realized by means of elliptical patches. The method is based on the fast solution of an integral equation discretized by using the method of moment with only two entire domain basis functions for each elliptical patch. The two-dimensional version of the Fast Multipole method is introduced to accelerate the solution of the linear system derived from the full-wave analysis method. Numerical results are provided to demonstrate the effectiveness of the proposed approach.