Bundled sinusoidal basis function in the method of moments analysis for waveguide slot antennas

The authors have proposed bundled sinusoidal basis function in the MoM for waveguide slot antennas. The MoM with a bundled sinusoidal basis function gives the same result as the normal MoM with 11 basis functions. The future task is to analyze the large array, in which the proposed method will be more effective.