Fast MBF based method for large random array characterization

The array pattern obtained for the example proposed in the previous section is shown in Fig. 4. The result for a 7λ radius of convergence is compared with the pattern obtained considering only the isolated element pattern, which can also be seen as the embedded element pattern for a radius of influence set to 0. A difference of 0.45 dB is observed at broadside direction between both approaches. It is striking that this difference is much more than what one would expect assuming that the effects of mutual coupling behave like a centered random variable. This bias, as well as more elaborate techniques for the fast array solution will be the focus of further research.