Fast spectral-domain MBF method for printed antennas

A fast spectral domain method to evaluate the reaction terms between the Macro Basis Functions (MBFs) is proposed. The presented technique is based on reducing the number of interactions by exploiting the properties of spectral domain methods applied to MBFs. The complexity of this method is independent from the complexity of the elements in the array, leading to much larger savings in matrix filling time for large arrays with complex antennas having large number of unknowns. Numerical results of the proposed method are compared with that of the pre-validated normal MBF solutions. An Excellent agreement between the presented techique and the reference solutions is reported.