The S1850M Long Range Volume Search Radar is able to detect them as well, since 2009..
They are build to be installed on the new R.N carriers.
It can detect a metal ball the size of a tennis ball 100 miles away..the saying is a F-35 looks like a metal golf-ball.
The S1850M is an improved version of the Dutch build Smart-L by Thales..
The Smart-L was also capable of detecting stealth technology but Thales was ordered to filter this out, at least that's the rumour, and it was 10 years ago.
More important the Smart-L can detect a missile at 2000 miles(!) making it the best Radar in the world to this day.
During trails it picked up a U.S balistic missile (launched for the test) at 400 miles away and tracked it outside the atmosphere it also calculated its complete trajectory, this is the only way to be able to do anything against such a missile.
S1850M:
http://en.wikipedia.org/wiki/S1850M