Russia's Arena-M Active Protection System Fails to Counter FPV Drones, Analysts Report

Radar Limitations Hamper Arena-M Effectiveness

Recent reports from Russian military analysts indicate that the Arena-M active protection system (APS), designed to safeguard armored vehicles, has proven largely ineffective against the growing threat of First-Person View (FPV) drones. The primary issue stems from fundamental shortcomings in the system's radar technology, which struggles to detect and intercept these small, agile aerial threats.

According to Russian defense expert Viktor Murakhovsky, cited by Defence Blog and Militarnyi, engineers have encountered significant problems with the Arena-M's radar operation. Murakhovsky noted that the radar 'struggles to detect and classify small, low-visibility targets,' particularly mini and micro-drones often constructed from radio-transparent materials like plastic.

Technical Challenges in Drone Detection

The Arena-M's radar, which has been in development since the late Soviet period, was designed to detect incoming anti-tank weapons and missiles. However, FPV drones present a different challenge due to their characteristics:

• Small Radar Signature: Their size and construction materials make them difficult for traditional radar systems to pick up.
• Low Velocity and Altitude: FPV drones often fly at low speeds and close to terrain, making them hard to distinguish from ground clutter.
• Algorithmic Deficiencies: Murakhovsky stated that the algorithms responsible for identifying, tracking, and prioritizing such targets remain 'underdeveloped' and that the necessary algorithmic solutions 'have not yet been created.'

Traditional air-defense techniques, such as Doppler filtering and moving-target indication, are reportedly ineffective against drones with very small radar cross-sections and low velocities. The system's radar is also reportedly configured to ignore objects moving below a certain speed, such as 250 km/h (150 mph), to prevent false positives, a threshold often below the operational speed of FPV drones.

The Evolving Threat of FPV Drones

FPV drones have become a ubiquitous and cost-effective weapon in modern conflicts, particularly in the ongoing conflict where both sides extensively employ them. These drones, often costing less than $1,000, can carry explosive payloads and are used as kamikaze munitions, capable of destroying armored vehicles with high precision. Their widespread use has highlighted a critical vulnerability in existing armored protection systems like the Arena-M.

Implications for Russian Armored Forces

Despite being showcased by state media as the future of Russian armored protection, the Arena-M's inability to reliably counter FPV drones means that Russian armored formations remain susceptible to these inexpensive yet potent threats. While the Arena-M is designed to intercept threats from all directions, including top-attack munitions, its current radar limitations against FPV drones pose a significant operational challenge. This situation underscores a broader weakness in Russia's defense-industrial base regarding the rapid adaptation to evolving battlefield realities and the proliferation of unmanned warfare.