Archer trial shows why old physics is back in military communications

Marconi Technologies has completed Swedish trials of its Archer troposcatter communications system, demonstrating a high-throughput 75 km tactical link between Enköping and Arboga.

The evaluation, conducted with Sweden’s defence materiel authority, focused on beyond-line-of-sight communications that do not depend on satellites or fixed infrastructure. Archer maintained a stable, frequency-diverse link on a difficult route and was integrated into Sweden’s mobile network node architecture, placing the system inside a realistic tactical communications environment rather than a standalone demonstration.

Troposcatter is an older communications approach, but its relevance has returned as modern forces confront satellite denial, jamming, cyberattack, and infrastructure disruption. The method uses the lower atmosphere to scatter radio signals beyond the horizon, allowing dispersed units to communicate without relying entirely on satellite communications or terrain-limited line-of-sight radio.

For manufacturers, the renewed interest is driven by resilience rather than novelty. Tactical communications equipment now has to be rugged, mobile, fast to deploy, hard to detect or disrupt, and easy enough for small teams to operate. Archer’s emphasis on automatic antenna alignment, compact deployment, and rapid setup reflects the practical demands of forces that cannot rely on fixed towers, fibre, or uncontested satellite links.

The trial also links to a wider hardening of military digital infrastructure. Cyber requirements are tightening at the system level, including the post-quantum transition pressures facing US defence contractors through new cryptographic migration deadlines. Troposcatter addresses a different layer of the network, but it belongs to the same shift: defence communications must survive attack from the physical link through to the encryption stack.

Ukraine has accelerated that thinking. Satellite communications have proved valuable, but no serious military network can depend on a single bearer. Jamming, spoofing, interception, cyber intrusion, and physical destruction all force planners toward layered communications. Future forces will need fibre, tactical radio, mesh networks, satellite links, line-of-sight relays, high-altitude platforms, and troposcatter working in combination.

Sweden’s geography adds a useful test environment. Forested terrain, dispersed units, northern operating conditions, and long distances create practical limits for line-of-sight radio. A system that can hold a high-throughput link across Swedish terrain has relevance for other NATO forces operating in the Baltics, Scandinavia, and Arctic-adjacent regions. Communications equipment built only for open desert or benign conditions will not satisfy that market.

The production base behind troposcatter sits across radio-frequency components, antennas, power systems, networking software, rugged enclosures, vehicle mounts, environmental protection, and operator interfaces. Scaling demand will require suppliers that can deliver reliable RF equipment while keeping terminals small enough for tactical mobility. Larger, cumbersome systems may perform well technically but fail procurement tests around deployment time, crew burden, and sustainment.

Interoperability will decide how far the market grows. Tactical users do not want a communications system that creates another isolated network. They need equipment that plugs into command posts, mobile nodes, encryption devices, battlefield management systems, and vehicle architectures. Archer’s integration into Sweden’s mobile network node architecture therefore gives the trial more weight than a simple range figure.

The return of troposcatter also shows how defence innovation often involves rebuilding older technologies with modern electronics and software. Better signal processing, smaller components, automated alignment, improved networking, and ruggedised packaging can make a previously cumbersome capability suitable for contemporary operations. The physics may be old; the deployable system is not.

For European forces, resilient communications are now moving from specialist signals units into core manoeuvre planning. Artillery, air defence, logistics, drones, command posts, and sensors all need data links under electronic attack. Manufacturers that can produce survivable, interoperable, and maintainable communications systems will sit close to the centre of NATO modernisation.

Marconi’s Swedish trial gives troposcatter fresh credibility in that market. As satellite dependency becomes a recognised vulnerability, defence customers are looking for alternatives that can be deployed quickly and maintained in the field. Archer’s performance suggests that beyond-line-of-sight tactical networking has room to grow beyond its Cold War reputation.