The only reason i see for Armata with radars its to intercept not only low flying aircraft and helicopters.
But also intercept low flying- top attack anti tank weapons , like Javelin missiles ,hellfire or spike missiles.
It makes sense for Russia defense industry to deploy defenses in armate against the most common threat
they will be facing ,and that is top attack anti tanks weapons.. US developed them knowing the vulnerability
of Russian and most world tanks from top attacks.. So perhaps ARmata main battle tank will have a limited
Pantsir functionality of shutting down missiles flying withing a 1-3km area range ,using a 30mm gun.. And its Active protection system could complement the system against very low flying rockets.. that attack in a linear trajectory like kornets or Rpg rockets.
What i would not be surprised however is if the armata line.. some of their armored vehicles ,or all of them..
have very aggressive counter electronics jamming hardware.. Someone asked the use of counter electronics
for a tank ? Simply any guided anti tank weapon or missile using radio communications (like hellfire missiles fired from apaches..) towards its target or any missile guided by TV camera.. (like spike missiles) can be easily jammed..and they will fail to hit the intended target.. the signal will be interrupted somewhere in the path.. and in the case of the spike missiles ,TV camera.. it will be blinded,so they will see nothing and will hit nothing...
Only wired anti tank missiles system or lazer guided like kornets will be able to be guided.. but im sure
that a system to counter that is possible..too.. ie.. that reads Lazer signals aimed at the tank.. and a system
on board can reproduce the lazer away of the tank position.. to fool the missile. If im not mistaken a similar system exist in Russia latest attack hellicopters.. at least a promotional video i saw.. appears to promote an anti lazer jamming system without using classic smoke wall..
Counter electronics is the future.. of modern warfare.. it can declare no fly zones against enemy drones and make
it impossible for any radio guided anti tank or aircraft missile to land on its target.. it will also jam tv camera guided weapons like spike and some air to ground missiles NATO have.. and it will also jam best NATO artillery that is GPS guided.. and GPS guided tomahawks too.
if you mix that with smart decoys ,that simulate tank signal or any hardware signal.. then effectively you will blind any NATO strike capability at at distance. and forcing them to fly at very close visual distance,to see their targets..which will make the their planes or helicopters very vulnerable to manpads or tanks 30mm guns..