Synopsis
- Designed by the Electronics and Radar Development Establishment under the Defence Research and Development Organisation, the radar sits at the heart of efforts to transform the Sukhoi Su-30MKI into a next-generation combat platform.
India’s “Super Sukhoi” upgrade program has taken a major step forward as the indigenous Virupaksha AESA Radar transitions from blueprint to reality, entering the critical prototype development phase. Designed by the Electronics and Radar Development Establishment under the Defence Research and Development Organisation, the radar sits at the heart of efforts to transform the Sukhoi Su-30MKI into a next-generation combat platform.
With the design work now completed, engineers have moved into full-scale hardware fabrication, setting up dedicated assembly lines and integration facilities over the past year. The program has effectively entered its most crucial phase, where core systems are being built, integrated, and validated on the ground before progressing toward flight testing and eventual operational deployment.
The Virupaksha AESA Radar is an indigenous 4D Active Electronically Scanned Array (AESA) sensor built on Gallium Nitride (GaN)-on-SiC technology, designed to become the technological core of India’s ₹60,000 crore “Super Sukhoi” upgrade for the Sukhoi Su-30MKI fleet. Featuring more than 2,400 transmit/receive modules, the radar is engineered to deliver long-range detection, multi-target tracking, and low probability of intercept (LPI) capabilities—marking a generational leap over legacy systems.
In a key March 2026 milestone, the program entered its “First Light” phase, with initial power-on testing conducted in late February. These early trials focused on beam-forming calibration and thermal management of the radar’s large 950mm antenna array—critical parameters for a GaN-based system where heat dissipation directly impacts performance and reliability. This phase is widely seen as a turning point, transitioning the radar from development to prototype validation.
A direct comparison illustrates how the Virupaksha reshapes the Su-30MKI’s sensor capabilities:
| Specification | N011M Bars (Current) | Virupaksha AESA (Upgrade) |
|---|---|---|
| Technology | PESA (GaAs) | AESA (GaN-on-SiC) |
| TR Modules | N/A | ~2,400–2,600 |
| Detection Range | ~140–150 km | 400+ km (target dependent) |
| Weight | ~650 kg | <300 kg |
| Target Tracking | 15 / 4 engaged | 60+ / 6+ engaged |
| Field of Regard | ±70° | ±100° (swashplate assisted) |
This leap is not just about range. The adoption of GaN brings significantly improved thermal efficiency—roughly five times the power density of older GaAs-based radars—allowing sustained high-power operation without performance degradation. In practical terms, this means better detection of low-observable targets, improved electronic warfare resistance, and the ability to manage multiple engagements simultaneously.
The Virupaksha is also part of a broader dual-track development strategy. While it is tailored specifically for the Super Sukhoi upgrade, it draws technological lineage from the Uttam AESA Radar being developed for lighter platforms. This shared ecosystem approach reduces development risk while accelerating deployment timelines, with the Super Sukhoi upgrade expected to roll out closer to 2028.
One of the most significant strategic decisions behind the program is India’s move away from reliance on foreign radar systems. Russia had offered the Irbis-E radar—used on the Su-35—as a potential upgrade. However, the Irbis-E remains a PESA system, limiting its ability to match modern AESA capabilities in areas like LPI digital stealth and simultaneous multi-mode operation. By opting for Virupaksha, India ensures full control over its sensor architecture, enabling seamless integration of indigenous weapons such as the Astra Mk-III and future stand-off systems without dependency on external source codes.
This concept of “sensor sovereignty” is increasingly critical in modern air combat. With full access to radar software and threat libraries, India can rapidly update its systems to counter evolving adversary technologies. It also allows tighter integration with electronic warfare suites, data links, and AI-assisted targeting systems—key components of next-generation aerial warfare.
Another defining feature is the radar’s expanded field of regard. Using a mechanical swashplate in combination with electronic beam steering, the Virupaksha can scan wider angles than traditional AESA systems. This enhances situational awareness and reduces the need for aircraft maneuvering during engagements, giving pilots a tactical edge in beyond-visual-range combat scenarios.
As testing progresses beyond the First Light phase, the focus will shift toward flight trials, integration with mission computers, and validation of real-world performance parameters. These steps are crucial to ensuring that the radar not only meets laboratory benchmarks but also performs reliably under operational conditions.
The Virupaksha AESA radar represents more than just an upgrade—it is a foundational capability that redefines the Su-30MKI’s role in future air combat. By combining long-range detection, advanced tracking, and digital stealth features, it positions India’s frontline fighter fleet to operate effectively in contested environments where information dominance and sensor superiority are decisive factors.
