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This paper presents a fast direct solver for the Combined Field Integral Equation using higher-order discretizations. By adopting higher-order polynomials with the Method of Moments, the number of unknowns is significantly reduced. The fast direct solver leverages the efficiency of...

The Higher-Order Array Decomposition Method (HO-ADM) has been extended to regular arrays with dielectric substrates. To maintain the multi-level block-Toeplitz Method of Moments (MoM) matrix structure, internal equivalent currents are introduced, ensuring an FFT-accelerated matrix vector product (MVP). Results demonstrate...