Russian body, Desi brain: How India is turning the Su-30MKI into a lethal stealth hunter

India is modernizing its Su-30MKI fighter jets by replacing their aging Russian radar with a new, homegrown system called Virupaksha. Developed by India's Defence Research and Development Organisation (DRDO), Virupaksha is designed to detect conventional fighters from 300 to 400 kilometres away and stealthier aircraft beyond 200 kilometres.

This upgrade is part of the broader Super Sukhoi modernisation programme, which aims to enhance the Su-30MKI's detection capabilities without a complete airframe redesign. The cost for the initial batch of 84 aircraft is estimated between ₹60,000 to ₹65,000 crore ($6 billion), though it awaits final approval from the Cabinet Committee on Security.

The radar's heart lies in the Active Antenna Array Unit (AAAU), a component built by Astra Microwave Products in collaboration with DRDO engineers. The AAAU employs Gallium Nitride material, enabling the radar to scan larger areas with greater efficiency, detect threats further away, and resist enemy interference. If completed by year-end, Virupaksha's successful implementation would signify a significant step forward for India's domestic defence electronics industry, showcasing the country's progress in developing advanced radar systems and gradually shifting towards self-reliance in fighter jet technology.