Domain Green's Function Method (DGFM) for Large Finite Arrays

The domain Green's function method (DGFM) is a perturbation approach where the mutual coupling between array elements is taken into account when calculating the Green’s function for each element. The current distribution on the entire array geometry is obtained by solving each element independently, leading to a significant saving in both runtime and memory usage.

The method also takes into account the edge effects attributed to the finite size of the array, complex excitations with non-linear phase shift and is not limited to periodic array configurations.

Figure 1. An array of non-identical patch antennas to be solved with the DGFM.