Terasi builds pocket-sized millimeter-wave radios for military units that need high-capacity links without fixed towers or fiber. The Swedish startup raised a reported $12.6 million seed round to scale that technology for military use, Sifted reported on September 22. The publication said the NATO Innovation Fund confirmed the deal, its first investment in a Swedish startup. Figures are in US dollars, converted at September 22, 2026 reference rates.
RU1 is a point-to-point radio designed for rapid field deployment. Operators can mount units on vehicles, drones, tripods, towers or masts, then use the link to carry live video, sensor feeds and command data. Terasi says the system can be installed in minutes for mobile command posts, unmanned systems and vehicle-to-vehicle or ground-to-air communications.
The narrow beam is part of the product, not just a way to move more data. Terasi says the directional signal lowers the probability of interception or detection and is designed to resist jamming and interference. It concentrates the connection between endpoints while providing full-duplex, low-latency throughput.
RU1 runs on Terasi’s AirCore technology, which powers compact radio-frequency front-end modules. The company says the design helps keep the radio light and energy-efficient, important for drones and forward units where size, weight and power are constrained. Terasi handles radio-frequency design, microelectronics, advanced packaging, manufacturing and testing in house in Stockholm.
That finished radio represents an expansion from Terasi’s earlier commercial plan. In 2022, KTH Holding said its portfolio company had delivered to a first pilot customer and initially aimed to sell micromachined components for measurement equipment before developing more complex systems for 6G. Four years later, Terasi is marketing a complete field radio; the reported seed round is intended to scale that military-facing system.