Arena active protection (Russia)
is an active countermeasure system developed at Russia's Kolomna-based Engineering Design Bureau for the purpose of protecting armored fighting vehicles from destruction by light anti-tank weapons, anti-tank guided missiles (ATGM), and missiles with top attack warheads. It uses a Doppler radar to detect incoming warheads. Upon detection, a defensive rocket is fired that detonates near the inbound threat, destroying it before it hits the vehicle.
The system incorporates the following engineering solutions:
use of a multi-functional millimetre radar with "instant" scanning of all protected sector to detect and track antitank targets;
use of focused instant-effect protective ammunition for aimed destruction of incoming targets;
control equipment, represented by a specialized computer that provides automatic control over radar operation and system as a whole, as well as device for serviceability control of the system and its integrated parts and units.
Protective ammunition is housed in silo sections arranged around the turret. The rack-mounted radar is fixed on the turret roof. All other equipment is housed inside the turret. Connecting cables from the turret run inside the radar rack without affecting the sealing of the fighting compartment.
The system is switched on from the commander's control panel and then operates automatically. On completion of power-on self-test, the system switches to combat mode. All information on the modes of operation and serviceability of the system and its integrated units is displayed on the control panel
Citation:
In combat mode, the radar continuously searches for incoming projectiles. Once the threat is detected the radar switches to the target tracking mode, in which the data on the moving target is obtained and entered into the computer, which uses it to select the most appropriate silo and determine the time for its activation. At the determined moment, the computer generates command signals to the selected protective ammunition. The later is launched upwards and detonates, creating a directed stream of destructive elements which destroys any target within this field, eliminating the shaped-charge effect of the threat or reducing it to levels that are not dangerous to the tank.
In emergency the commander (operator) can manually operate and detonate protective ammunition from the control panel.
ARENA Active Protection System