|NIIP's Byelka AESA radar for the PAK FA on display at the 2009 MAKS airshow|
|Role||X-Band, L-Band active electronically scanned array|
|Primary user||Russian Air Force|
N036 Byelka (Russian: Белка, literally Squirrel) is an advanced active electronically scanned array radar system developed by Tikhomirov NIIP for the fifth generation Sukhoi T-50 fighter aircraft. NIIP developed the radar from the N035 Irbis-E that was equipped on the Su-35S fighter aircraft.
The radar is a part of the T-50's Sh121 multifunctional integrated radio electronic system (MIRES). The N036 radar system is developed by Tikhomirov NIIP Institute and consists of a main nose-mounted X-band AESA radar with 1,552 T/R modules, designated the N036-1-01, and two smaller X-band AESA radars with 358 T/R modules mounted on the sides of the forward fuselage designated N036B-1-01. The suite also has two N036L-1-01 L-band arrays on the wing's leading edge extensions that are not only used for friend-or-foe identification but also for electronic warfare purposes. Computer processing of the X- and L-band signals enable the systems information to be significantly enhanced. The L402 "Himalayas" electronic countermeasures (ECM) suite made by the KNIRTI institute uses both its own arrays and that of the N036 radar.
- Андрей Фомин (2010). «Пятое поколение: у нас и у них» (приложение к журналу «Взлет»). Москва: Аэромедиа. pp. 38, 48–49.
- Butowski 2012, p. 50.
- Butowski 2013, p. 79.