The Indian Air Force (IAF) is actively fortifying its aerospace surveillance grid through the induction of both domestic and foreign-made Very High Frequency (VHF) radars.
These advanced systems are specifically engineered to identify hard-to-detect targets, including cruise missiles and stealth combat jets.
This growing network acts as a major upgrade to the country's comprehensive air defence shield, ensuring better early-warning capabilities against the new wave of fifth-generation fighter threats emerging in the neighbourhood.
This strategic push toward VHF radar deployment aligns with the rapid proliferation of stealth platforms across the Asian continent.
Modern stealth aircraft are predominantly shaped to remain invisible to traditional, high-frequency fire-control sensors, such as X-band or Ku-band systems.
In contrast, VHF radars operate on longer wavelengths that physically interact with the size and shape of an aircraft in a completely different manner, effectively neutralizing standard radar-evading designs and making low-radar-cross-section (RCS) jets visible on the screens.
However, while spotting a stealth fighter is a crucial first step, it is distinct from securing the highly precise tracking data required to guide a surface-to-air missile. Consequently, these VHF installations function as the vital early-warning eyes of the military.
Once they detect an incoming threat, they instantly pass the target's general location to higher-frequency engagement radars within the broader air defence network, which then lock on and initiate an interception.
To build this robust anti-stealth umbrella, New Delhi is blending homegrown technological innovations with strategic international purchases, establishing a multi-tiered and overlapping surveillance web.
A standout achievement in domestic manufacturing is the DRDO-BEL VHF radar, which was first showcased in early 2025.
Created jointly by the Electronics and Radar Development Establishment (LRDE) and Bharat Electronics Limited (BEL), this highly mobile system functions within the 30 to 300 MHz frequency range.
Specifically tailored to unmask stealthy aerial vehicles, it is installed on heavy-duty TATRA trucks, granting it exceptional mobility for swift relocation and wartime survival. The system can monitor the skies for threats at distances exceeding 185 kilometres (100 nautical miles).
The private defence sector in India is equally contributing to this mission.
Bengaluru-based Alpha Design Technologies Limited (ADTL) recently delivered the SURYA solid-state 3D VHF radar to the IAF under a reported ₹200 crore contract.
Built to pinpoint stealth jets and low-RCS threats, the SURYA radar scans a full 360 degrees and can track targets up to 360 kilometres away, reaching altitudes of 15 kilometres.
Its modern solid-state design ensures high operational reliability, while advanced digital signal processing shields it from enemy electronic warfare and jamming attempts.
Further bolstering this domestic lineup is the recent induction of the Russian-built 55Zh6ME Nebo-UM VHF radar.
Recently spotted in action during the IAF’s Vayu Shakti 2026 military exercises, this mobile, three-dimensional system is a massive leap forward in tracking stealth fighters, hypersonic projectiles, and ballistic missiles.
Operating on meter-long wavelengths, the Nebo-UM leverages sophisticated digital filtering and robust electronic counter-countermeasures to maintain clear visibility even in hostile, jammer-heavy combat zones.
Operational data indicates that the Nebo-UM can spot stealth platforms from over 250 kilometres away and conventional aerodynamic threats up to 600 kilometres. Additionally, it has the capacity to track objects travelling at speeds up to Mach 6.4 and at altitudes surpassing 80 kilometres.
y simultaneously calculating a target's exact distance, direction, and altitude in full 3D, it feeds critical, real-time firing coordinates to India’s overarching air defence grid. Mounted on heavy 8x8 wheeled vehicles, its "shoot-and-scoot" mobility ensures it remains safe from counter-attacks.
When combined, these radar platforms establish a seamless, multi-layered defensive shield.
The homegrown systems ensure self-reliance and widespread territorial coverage, whereas advanced foreign imports like the Nebo-UM offer combat-proven, ultra-long-range vision.
All these sensors are designed to share data instantly with active engagement platforms, including the S-400 Triumf, the Akash missile batteries, and forthcoming domestic surface-to-air systems developed under Mission Sudarshan Chakra.
This rapidly maturing architecture guarantees that India can monitor hostile intrusions long before they breach its borders.
While Pakistan is reportedly planning to acquire up to 40 Chinese-made J-35 fifth-generation stealth fighters, this procurement will not guarantee them unimpeded access to Indian skies.
Instead, any incoming stealth jets will be forced to navigate a formidable and dense gauntlet consisting of VHF early-warning nodes, standard high-frequency radars, AWACS (Airborne Warning and Control System) aircraft, and a highly integrated missile defence network, severely complicating Islamabad's future air superiority ambitions.
