Active Electronically Scanned Array (AESA) Radar

AESA radar offers a direct replacement for the older passive electronically scanned array (PESA) radars.

It works by spreading signals out across a band of frequencies, making it difficult to detect over background noise.

Aircraft and naval vessels are then able to emit powerful radar signals while still remaining undetected by the enemy.

Eurofighter Typhoons used by the Royal Air Force currently use the technology but the Russian military now hopes to use the same technology on its next generation jets.

AESAs are also much more reliable than older devices and can even adjust to become a jamming device to confuse the receiver as to which is the real pulse and which is the jammer's.