You can’t, in general, put people above the air search radar. (Exercise for the reader: why is it ok for the pilothouse of US AEGIS ships to be located above the SPY-1 arrays?)
on most ships, the air search radars are on masts or platforms well above where any people work while underway. but on US AEGIS ships (CG 47, DDG 51), the pilothouse is located above the phased array panels. however, all of the arrays are on the outside of the blocky superstructure, pointing AWAY from the pilothouse. (there was a quote in that message about not leaning over the rails when standing on the bridge wings!)
the navantia design and derivatives (including the Nansens) did not take up this idea. presumably because they're smaller and needed the stability, but i'm just guessing there.