Abstract
A new local solution-based iterative scheme for the method of moments (MoM) analysis of large-scale antenna arrays, such as those envisaged for the mid-frequency aperture array (MFAA) part of the Square Kilometre Array (SKA) telescope, is presented in this paper. Localised sub-problems, one associated with each array element, are solved iteratively. Global coupling is incorporated in these local problems through a direct-coupling approximation of non-local currents. The local problem matrices are excitation and iteration independent, hence they can be computed and inverted once and then reused to solve for multiple excitation vectors. Rapid convergence, which is practically independent of excitation, is demonstrated. The method’s localised nature renders it ideally suited to parallelisation.
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