  A spatially reconfigurable antenna arrays consists of an antenna array of
finite length and fixed geometry which is displaced within a given area. Using
these reconfigurable components, the performance of MIMO systems is remarkably
improved by effectively positioning the array in its displacement area. This
paper studies the large-system performance of MIMO setups with spatially
reconfigurable antenna arrays when the displacement area is large. Considering
fading channels, the distribution of the input-output mutual information is
derived, and the asymptotic hardening property is demonstrated to hold. As the
size of the displacement area grows large, the mutual information is shown to
converge in distribution to a type-one Gumbel random variable whose mean grows
large proportional to the displacement size, and whose variance tends to zero.
Our numerical investigations depict that the type-one Gumbel approximation
closely tracks the empirical distribution even for a finite displacement size.
