GNSS Anti-Jamming Modules: Why Navigation Protection Matters for Drones

Global Navigation Satellite System (GNSS) signals — GPS, BeiDou, Galileo, GLONASS — have become the backbone of modern drone operations. They provide the positioning, navigation, and timing data that enable everything from precision agriculture to critical infrastructure inspection to military reconnaissance.

But that reliance comes with a vulnerability.

GNSS signals are inherently weak by the time they reach the ground. A signal from a satellite in medium earth orbit can be easily disrupted — either accidentally or intentionally. And in recent years, intentional disruption has escalated dramatically.

Spoofing incidents increased by 500% in 2024, driven largely by the proliferation of drone warfare in Eastern Europe and the Middle East. According to IATA data, GPS signal loss events increased by 220% between 2021 and 2024. Poland alone reported 2,732 GPS jamming incidents in January 2025. Globally, approximately 900 flights per day are currently affected by GPS interference.

These are not distant statistics. They reflect a threat that is increasingly affecting commercial aviation, critical infrastructure, and security operations worldwide.

Understanding the threat requires distinguishing between two types of GNSS interference:

Jamming simply denies access to GNSS signals by overwhelming the receiver with noise until it can no longer determine its position. The drone loses navigation capability — it may drift, return to launch, or crash.

Spoofing is more insidious. It sends a stronger, counterfeit signal that the receiver treats as genuine. The drone is fed false position data and gradually steered off course — often without triggering any alert from the autopilot.

In the worst cases, spoofing can redirect a drone into restricted airspace, over sensitive infrastructure, or across international borders.

The conflict in Ukraine has demonstrated this in real time. Russia has been using GPS spoofing from its Kaliningrad exclave to steer Ukrainian drones off course and into NATO airspace. Lithuania reported that Russia's spoofing transmitters in Kaliningrad increased from 3 at the start of 2025 to 36, with false signals now reaching up to 450 kilometers across the region. Ukrainian drones have been redirected toward Poland, the Baltic states, and Finland. One struck a Latvian oil depot on May 7, 2026, exploding on impact.

For any drone operating in contested or even semi-contested airspace, GNSS anti-jamming protection is no longer a luxury — it is a necessity.

Anti-jamming modules serve a critical function: they ensure that a drone can maintain reliable navigation even when GNSS signals are being actively disrupted. They protect against both jamming (signal denial) and spoofing (signal manipulation), ensuring that the flight control system receives truthful positioning data.

The stakes are high. A single corrupted navigation signal can mean the difference between a mission completed and an aircraft lost. For applications involving critical infrastructure inspection, border security, VIP protection, or military operations, navigation integrity is non-negotiable.

Major industry players are responding. Honeywell Aerospace is expanding its anti-jamming navigation toolkit with alternative navigation methods — radar velocity, visual navigation, and LEO satellite signals. Septentrio recently launched a GNSS module featuring "the highest level of anti-jamming and anti-spoofing protection" for mission-critical UAV applications. Roke has introduced an anti-jam navigation system designed to widen access to protected GNSS technology.

At SUNON, we design and manufacture GNSS anti-jamming modules specifically for UAV platforms. Our solutions are built for real-world conditions — compact, lightweight, and field-ready.

Our SAJ-P4100D dual-band, 4-channel GNSS anti-interference module, for example, measures just 65mm × 65mm and covers BDS B1, GPS L1/L5, and Galileo E1 — the core frequencies used by modern drones. It delivers dual-band protection against signal interference and operates reliably across extreme temperatures from -45°C to 70°C.

We believe that navigation protection should be accessible, practical, and integrated — not an afterthought. Whether you are securing critical infrastructure, conducting border patrols, or operating in GNSS-contested environments, SUNON provides the hardware you need to keep your drones on course.

The numbers tell the story. The counter-UAS market was valued at USD 11.60 billion in 2025 and is projected to grow to USD 55.25 billion by 2034. The UAV jammers market alone is estimated at USD 1.77 billion in 2026, projected to reach USD 5.90 billion by 2031.

This growth is driven by one simple reality: drones are everywhere, and so is the threat to their navigation systems. As drone operations expand — in commercial, security, and military applications — the demand for reliable GNSS protection will only accelerate.

GNSS interference is no longer a theoretical risk. It is happening now — over conflict zones, over civilian airports, over critical infrastructure. The 500% increase in spoofing incidents, the 2,732 jamming events in a single month in Poland, the 900 flights affected daily — these are not warnings. They are the current state of play.

For drone operators, security teams, and defense organizations, the question is no longer whether to invest in GNSS anti-jamming protection. The question is: how soon?

At SUNON, we are ready with answers.