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 1526 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 Himaraya electronic countermeasures (ECM) suite made by the KNIRTI institute uses both its own arrays and that of the N036 radar.
N036L-1-01 AESA radar
N036B-1-01B AESA radar on display at the 2013 MAKS airshow