RCS comparisation on World's best Fighter Aircrafts

According to the RAF, the Eurofighter's RCS is better than RAF requirements. Comments from BAE Systems suggest the radar return is around one quarter of that of the Tornado it replaces. The Eurofighter is thought to have an RCS of less than one square metre in a clean configuration by author Doug Richardson, although no official value is available.

Aircraft	Estimated radar cross section (RCS)
Sukhoi Su-30MKI	20 square metres
Dassault Rafale	1.25 square metres
Eurofighter Typhoon	1 square metre
Sukhoi Su-35BM	1 square metre
Lockheed F-117 Nighthawk	0.025 square metres
Lockheed  F-35 Lightning II	0.0015 square metres
Lockheed Martin F-22 Raptor	0.0001 square metres

The manufacturers have carried out tests on the early Eurofighter prototypes to optimize the low observability characteristics of the aircraft from the early 1990s. Testing at BAE's Warton facility on the DA4 prototype measured the RCS of the aircraft and investigated the effects of a variety of RAM coatings. Another measure to reduce the likelihood of discovery is the use of passive sensors, which minimises the radiation of treacherous electronic emissions. While canards generally have poor stealth characteristics,the flight control system is designed to minimise the RCS in flight, maintaining the elevon trim and canards at an angle to minimise RCS.

(source : wikipedia)