摘要： The domain green’s function method (DGFM) [1] and its enhancement through the iterative Jacobi approach is a novel method-of-moments (MoM) based domain decomposition technique that can be used to analyse ?nite antenna arrays consisting of identical, disconnected elements. Fundamental to the DGFM is the calculation of the active impedance matrix for each array element. This matrix is formulated as a weighted summation of the self-interaction matrix for the array element, to which the coupling sub-matrices are added that account for the surrounding array environment. When considering the computational complexity of the algorithm, this step in the solution process dominates the runtime. Previously, the adaptive cross approximation (ACA) was used to obtain a low-rank approximation for the coupling terms that signi?cantly accelerated this summation [2]. In this work, an alternative approach is proposed to accelerate this calculation based on representing the reaction between two separated basis functions with the equivalent dipole-moment (EDM) method [3], [4].