The Bars (Leopard) is a family of Russian (former USSR) all-weather multimode airborne radars developed by the Tikhomirov Scientific Research Institute of Instrument Design for multi-role combat aircraft such as the Su-27, Su-30 and the MiG-29.

In an effort to improve performance the antenna design was changed to a multi-channel passive electronically scanned array (PESA).

The design of the N011M Bars antenna like the earlier N007 antenna consists of two separate electronically controlled arrays, an X band radar and an L band IFF transponder with a total weight of 100 kg and a diameter of 960 mm.

The 28 MHz Ts200 programmable signal processor used in N011M incorporates Fourier transforms of "butterfly" type capable of 75 Million operations per second.

The N011M supports digital signal processing using 3 processors with 16 MB of both static and flash memory.

India was supposed to build both programmable signal processors and data processors under project "Vetrivale" to replace the original Russian components, but failed to do so within the required time frame, so MK2 still used the Russian equipment.

However, for transmitting, N011M uses PESA technology in that a single Chelnok traveling-wave tube is used for EGSP-6A transmitter.

Against stealth target with 0.01 square meters, the head-on effective range is in excess of 90 km.

The Bars-29 shares up to 90% of its software and hardware with the original Bars radar while being small enough to be installed within the nose of the MiG-29 fighter.