Finland tests wind-turbine radars and marine sets for small-drone detection

Key facts

• Finland is exploring compact marine navigation radars to detect small drones.
• LUT University researchers propose installing radar sensors in wind turbines as a scalable complement to conventional air surveillance.
• The approach is positioned as especially relevant for NATO’s eastern flank, where persistent low-altitude drone detection needs have increased.

3 minute read

Finland is assessing two pragmatic options to bolster its ability to detect small drones at low altitude: employing compact marine navigation radars and installing radar sensors within wind turbines. The work, attributed to researchers at LUT University, frames these approaches as relatively inexpensive and readily scalable complements to conventional air-surveillance systems, which are typically optimised for higher-altitude, larger targets and may be cost-inefficient to densify for pervasive counter-UAS coverage.

Embedding sensing into wind turbines is particularly noteworthy for Europe because it leverages an expanding, geographically distributed infrastructure footprint that already occupies tactically relevant terrain—coastal approaches, sparsely populated border regions, and areas near critical energy assets. In principle, a wind-farm-based radar layer could offer persistent coverage and a distributed sensor geometry that improves detection opportunities, provided that signal-processing can handle rotor-blade clutter and that operators can distinguish small drones from birds and other low-RCS objects.

The use of compact marine navigation radars suggests a parallel, fast-to-field pathway for coastal and port environments, where such systems are mature, widely available, and supported by established supply chains and maintenance ecosystems. For European procurement and industry, the attraction is modularity and speed: these radars could be deployed as interim coverage enhancers or as part of a layered sensor concept alongside electro-optical, acoustic, and RF detection.

For NATO’s eastern flank states, the implication is a potentially affordable method to increase sensor density for persistent low-altitude surveillance without waiting for long-cycle national air-defence modernisation. However, moving from concept to operational utility will hinge on integration into command-and-control, data fusion with existing air pictures, legal and governance arrangements for using civilian infrastructure as a sensing node, and clear delineation of responsibilities between wind-farm owners, regulators, and defence authorities.

Source: Dronewatch.eu