An Iterative Method for the Analysis of Large Disjoint Antenna Arrays

A new iterative method is presented, for the efficient method of moments (MoM) analysis of large antenna arrays with identical, disjoint elements. The method is an extension of the domain Green’s function method (DGFM). At each iteration, a local domain radius is used to identify sub-problems of closely-coupled elements centred around each antenna element. Rigorous MoM analysis is used on these local domains to account for strong mutual coupling, with an iteratively-refined current scaling assumption used to account for the influence of currents on the rest of the array elements. Numerical results demonstrate that the technique can converge rapidly for arrays with closely-spaced elements.