On the effects of mutual coupling in the active reflection coefficient of wide-field scanning electrically large random phased arrays

Abstract

Wide-angle scanning phased arrays suffer from bandwidth limitations due to the effects of mutual coupling. If the array is regular, blind scan anomalies can be found in the active reflection coefficient in band for even 2:1 bandwidth ratios. If the array has a random distribution of elements however, we can see how the effects of mutual coupling randomize out in the active reflection coefficient, effectively increasing the frequency and scan range bandwidth.