Small unmanned aerial systems have turned low-altitude air defence into a detection problem as much as an interception problem.

Quadcopters and lightweight fixed-wing drones can fly slowly, hover, and exploit clutter from terrain, buildings and vegetation. Their radar cross-section is often small enough to fall below the comfortable detection threshold of older tactical air-search radars, particularly when operators are trying to filter out birds and ground returns.

Against that backdrop, Russian industry has promoted a dedicated counter-drone radar complex known as Valdai (often rendered “Valday”). Reporting based on Russian statements describes it as a mobile system that combines several sensors and electronic countermeasures rather than relying on radar alone. One description says Valdai is divided into five elements: a control module, radar module, optoelectronic module, a direction-finding module for radio emissions, and a countermeasure module intended to jam control and navigation links.

What Russia claims Valdai can do

Russian-source reporting has attached specific performance claims to the system. One commonly repeated figure is detection of small commercial-style quadcopters at roughly 5–6 km, with larger aerial targets detected at 15 km or more, depending on conditions. The same reporting frames the core challenge as low-RCS, low-speed targets and argues that parallel radar search plus RF direction finding helps reduce false alarms and cue identification.

Open reporting has also linked Valdai to Russia’s broader counter-UAS posture during the war against Ukraine. Ukraine’s Defence Intelligence has publicly described strikes on a Valdai radar in occupied Crimea, framing it as a system used to detect small UAVs. While those battlefield claims are difficult to corroborate in detail from open sources, they indicate that Valdai is deployed operationally and treated as a relevant asset. Separate reporting has described the Valdai complex as developed by the Lianozovo Electromechanical Plant and entering Russian military service in 2021.

None of this establishes that Valdai meets its published performance figures under combat conditions. The most important point is structural: the system is presented as a sensor-and-effect chain in one vehicle—radar detection, electro-optical confirmation, RF cueing, and jamming—rather than a radar that simply hands off tracks to another layer.

Saab’s Giraffe family as a benchmark

When Western militaries discuss low-level surveillance for drones, Saab’s Giraffe family is frequently used as a reference point because it sits in the tactical air-defence space rather than the long-range strategic one. Saab positions Giraffe 1X as a compact 3D radar with rapid volume updates—“covers the entire search volume every second”—and specifically highlights a “drone tracker function” intended to detect and track small or mini UAVs while reducing false alarms.

Recent procurement signals show this is not only marketing. In October 2025, Saab disclosed a roughly $46 million order from the US Army for Giraffe 1X radars, explicitly tied to air defence and counter-UAS demand. Saab also announced a Swedish order for Giraffe 1X in December 2025, again listing counter-UAS among its intended applications.

As a benchmark, Giraffe 1X illustrates a Western emphasis on fast refresh, mobility, and software-defined upgrades, with the radar acting as an early warning and track-quality source for whichever effector—guns, missiles, jammers, or interceptors—is integrated downstream.

Western alternatives: different answers to the same problem

Western counter-drone radar options span several design philosophies.

Battlefield multi-mission radars sit close to traditional short-range air-defence. Thales’ Ground Master 60 is described as a compact 3D tactical radar for short-range air surveillance, with claims centred on multi-mission use and the ability to detect a range of target types. This class tends to trade extreme small-target optimisation for broader tasking and integration into established ground-based air-defence architectures.

Purpose-built counter-UAS and very short-range radars focus on discrimination in clutter. HENSOLDT’s SPEXER 2000 3D MKIII is positioned for ground-based air defence and counter-UAS, using an X-band pulse-Doppler approach and automatic target classification features intended to separate small aerial targets from background returns. In December 2025, Reuters reported that SPEXER radars would be supplied for integration into Rheinmetall air-defence applications, including Skyranger 30 and a laser-based drone-defence system.

Compact perimeter and hemispheric radars aim at short-range detection with high track update rates. Radartutorial summarises the RPS-42 (linked to the RADA family now marketed by Leonardo DRS) as a pulse-Doppler, software-defined radar with a stated detection range of about 3.5 km for the smallest “nano” UAV class. Leonardo DRS describes its Multi-Mission Hemispheric Radar family as an AESA-based sensor used for counter-UAS and very short-range air defence roles.

Low-power drone-detection radars are also appearing for site security. Robin Radar Systems publishes specifications for its IRIS drone radar, listing X-band operation and an instrumented range of 5 km in a lightweight form factor.

At the lighter end still, Echodyne promotes compact electronically scanned radar products for counter-UAS, with brochures emphasising low size, weight and power for fixed, mobile, and in some cases airborne applications.

Comparing “Valdai” to Western approaches

The practical comparison is less about any single quoted range and more about system design choices. Valdai is described as a combined sensor-and-jammer vehicle, with radar, EO and RF direction finding designed to identify both the drone and, potentially, the operator’s control link.

Western solutions more often separate functions: a radar such as Giraffe 1X provides rapid detection and track updates, while identification, electronic attack, and kinetic defeat are supplied by a wider counter-UAS architecture that can be swapped or upgraded over time.

For procurement teams, the key questions remain consistent: detection in clutter at very low altitude, false-alarm management, track quality for cueing effectors, and resilience against jamming and saturation.

The “Valdai” claim highlights Russia’s attempt to package these functions tightly. Western alternatives show a spectrum from integrated tactical air-defence radars to small, specialised sensors intended to plug into a broader counter-UAS network.