[Llarry]

U.S. Navy plans to retrofit missile destroyers with the new AN/SLQ-32(V)7 electronic warfare system at great cost. The antenna array is much larger, requiring fairly extensive changes topside. Here's an old photo of the array (left) in an anechoic chamber.

I think DDG 125-up with have the new system built in and the attached photo of a notional DDG replacement shows a forward-facing array as well -- so maybe there will be four EW arrays instead of the previous two? Electronic warfare appears to be increasing in importance.