Space chips: the quiet battle for low Earth orbit

When a user installs a satellite antenna on a roof, in a remote village or on a ship, they do not see the radio-frequency chips, amplifiers or circuits that steer the signal. Yet that is often where the new space economy is being decided. Low Earth orbit is no longer only about rockets and satellites visible in the sky. It also depends on tiny components, manufactured at scale, that can turn an object hundreds of kilometers above Earth into a usable connection on the ground.

In early May 2026, STMicroelectronics put a precise number on this shift. The Franco-Italian group is targeting more than $3 billion in cumulative space-chip revenue between 2026 and 2028. According to Reuters, that ambition is being driven by low Earth orbit, or LEO, satellite constellations. STMicro says revenue linked to those networks rose from about $175 million in 2021 to around $600 million in 2025, and is approaching $1 billion in 2026. The company also claims nearly 90% market share in this specific segment. These figures come from company statements reported by Reuters: they indicate an industrial trajectory, not an independent measurement of the entire space market.

The difference from traditional space infrastructure is clear. Geostationary satellites, positioned about 35,786 km above Earth, mostly serve as large specialized platforms: robust, but distant. LEO constellations operate much closer to Earth, often at altitudes of a few hundred to a few thousand kilometers. They can reduce latency and cover underserved areas, but that gain has a cost: many satellites, terminals able to track fast-moving objects, fine spectrum coordination and electronics manufactured at very high volume.

STMicro has a distinctive position in this supply chain. In December 2025, the company said it had shipped more than five billion radio-frequency chips to SpaceX for Starlink antennas over ten years. Reuters reported that this volume could double by 2027. These components, designed with teams in France and Italy and manufactured in facilities including France, Malta and Malaysia, support phased-array antennas. Those antennas steer signals electronically without mechanical movement. To the user, the product looks like a compact antenna; industrially, it is a dense assembly of components, radio software and thermal constraints.

The market now goes far beyond SpaceX. Amazon renamed Project Kuiper as Amazon Leo in November 2025 and presents a constellation of 3,236 low Earth orbit satellites, connected through optical links and ground stations. According to The Guardian, Amazon expects a commercial launch in mid-2026, with around 200 satellites already deployed at the time of the announcement and customers named across aviation, telecoms, public services and government. Amazon’s own mission updates later listed more than 300 satellites deployed after several Atlas V, Ariane 6 and Falcon 9 missions. Low Earth orbit is becoming a potential layer of ordinary digital infrastructure, not only a specialized space tool.

In Europe, Orange announced in March 2026 a partnership with AST SpaceMobile and Satellite Connect Europe to test direct-to-device satellite connectivity. The trial planned in Romania in the second half of 2026 is expected to cover voice, SMS and data from standard smartphones. The goal is easy to grasp: keep a phone reachable where terrestrial towers are not enough. Orange presents this approach as an extension of its mobile network, not a replacement. Satellite can strengthen coverage and resilience when terrestrial networks are absent, insufficient or temporarily damaged.

Sovereignty also runs through spectrum. On May 27, 2026, Reuters reported that the European Union wanted to allocate most future 2GHz mobile satellite spectrum to European companies, with part reserved for state services and the future IRIS² network. The compromise under discussion still leaves room for non-European players such as Starlink and Amazon Leo, but it shows that frequencies are becoming strategic assets. Without spectrum, a constellation is incomplete. With poorly governed spectrum, it can create interference, dependency or diplomatic tension.

The momentum is also Asian. In China, Xinhua reported several launches of low-orbit internet satellite groups in January and April 2026, as well as public support for satellite internet development, direct links between satellites and mobile phones, and broader access for private enterprises. The Global Times also reported the creation of a national technical committee to standardize satellite internet systems and services. These Chinese sources are institutional or close to the state: they confirm a strategic priority, but do not provide independent measurement of performance, cost or operational constraints.

In Japan, Rakuten Mobile and AST SpaceMobile announced in April 2025 that they had completed a broadband video call between standard smartphones using a LEO satellite. Mobile World Live also reported that Rakuten Mobile was targeting a satellite-to-mobile service in 2026. In India, The Economic Times says Starlink may need fresh authorization from IN-SPACe to offer direct-to-device services. These examples show that the LEO race is not only about launches: each country must balance coverage, spectrum, sovereignty and dependence on private operators.

Satellite-to-phone connectivity is the most concrete turning point, but it should not be confused with unlimited space-based 5G. In the near term, the most realistic uses are emergency messaging, SMS, selected critical notifications, location services, then voice and limited mobile data when the handset, spectrum and network allow it. Heavy uses such as continuous mobile video or high-throughput smartphone broadband without a dedicated antenna remain much more constrained. A smartphone transmits with limited power, its internal antenna is tiny, the satellite moves quickly, and available radio spectrum is contested.

Early public measurements support that caution. A 2025 arXiv study based on crowdsourced data from Starlink’s direct-to-cell service in the United States observes mostly low-throughput use cases during the study period. It estimates that mobile-data performance per beam would remain in the range of a few Mbps in outdoor conditions, with more favorable scenarios depending heavily on available spectrum, regulatory authorization and permitted power levels. Another techno-economic analysis concludes that D2D services can become viable, but only under specific assumptions about cost, subscriber density, network architecture and spectrum sharing. These works are preprints: they clarify constraints, but do not replace long-term, independent commercial measurements.

The regulator is becoming as important as the engineer. In the United States, the FCC adopted in 2024 a Supplemental Coverage from Space framework to facilitate cooperation between mobile operators and satellite networks. The rules target expanded coverage in remote areas and emergency services, while setting conditions for the use of terrestrial spectrum by space systems. The International Telecommunication Union published several 2026 analyses of direct-to-device services, describing them as a step toward converged terrestrial-space networks. The issue is no longer just experimental; it is entering telecom planning.

The promise also has a major limit: low Earth orbit is already congested. The European Space Agency’s 2025 Space Environment Report notes that about 40,000 objects are tracked by space surveillance networks, including roughly 11,000 active payloads. A 2026 preprint on orbital debris, based on public ESA, NASA, FCC, NOAA, JAXA and OECD sources, cites about 44,870 tracked objects in Earth orbit, more than 15,800 tonnes of orbiting mass, around 54,000 objects larger than 10 cm, 1.2 million objects between 1 and 10 cm, and 140 million objects between 0.1 and 1 cm. These figures vary by model and threshold, but the signal is robust: the more commercial LEO becomes, the more collective orbital management matters.

The OECD frames the risk in economic terms: if debris density keeps rising, some valuable orbits could become difficult or even impossible to use. Those orbits support meteorology, climate research, disaster management, environmental monitoring, commercial operations and defence applications. The real cost of orbital debris is therefore not limited to lost satellites; it also affects public, scientific and economic services that are hard to replace.

Night-sky visibility adds a less visible but real constraint. A January 2026 preprint on Amazon Leo satellites, based on 1,938 observations, estimates a mean apparent magnitude of 6.28 and says that 92% of observed satellites in operational mode would exceed the brightness limit recommended by the International Astronomical Union to reduce interference with research. The result should be treated with caution because it is a preprint and depends on specific measurements. It still shows that constellations do not only produce services; they also reshape a shared orbital, radio and astronomical environment.

These constraints qualify the narrative of unlimited connectivity. A useful constellation must offer acceptable throughput and latency, but also avoid interference, limit collision risks, manage satellite end-of-life, protect astronomical observation and clarify data governance. Chips do not solve all of this. They make possible an infrastructure whose effects extend far beyond the terminal installed by the user.

Component geopolitics adds another layer. Reuters reports that STMicro sees China as a promising market for user terminals, but that export controls prevent the company from engaging with local satellite technology. This restriction shows that space chips are joining the broader field of strategic semiconductors. A radio-frequency component may appear ordinary inside a terminal; it becomes sensitive when it supports infrastructure capable of cross-border, emergency, industrial or military communications.

Sources therefore need to be read with their incentives in mind. Reuters provides the strongest journalistic framing, but partly relies on STMicro’s statements. The companies cited each defend their roadmap: STMicro emphasizes its industrial footprint, Amazon global access, Orange mobile complementarity and AST SpaceMobile its BlueBird satellites. Chinese sources emphasize sovereignty and industrial acceleration. Preprints offer useful technical signals, but remain provisional. No single source is sufficient: credibility comes from comparison.

For users, the right question is not whether satellite is more modern than fiber, 4G or 5G. The right question is simpler: in which situation does it genuinely help? In an isolated rural area, on a ship, in an aircraft, at a remote mining site, for a humanitarian organization or after a natural disaster, a LEO link can have immediate value. In a dense city, it will often be less relevant than a well-designed terrestrial network. The technology becomes useful when it serves a specific context, not when it merely adds another layer of abstraction.

The space-chip market therefore reveals a quiet but deep shift. Space is entering an industrial phase in which performance is no longer measured only by the number of satellites launched, but by the quality of the components that make those networks usable: antennas, radio chips, terminals, signal-management software, ground stations, spectrum agreements and orbital-safety rules. Low Earth orbit is becoming strategic because it forces engineering, sovereignty, human use cases and environmental responsibility to be connected. It is less spectacular than a launch, but probably more decisive for the next decade of connectivity.

FAQ

Why are space chips becoming strategic?

Because LEO constellations depend on antennas, terminals and radio modules produced at scale. Without reliable, efficient and available chips, consumer satellite services remain too expensive, unstable or difficult to integrate with mobile networks.

Will direct satellite-to-smartphone replace mobile networks?

No. The most credible uses involve complementary coverage: dead zones, emergency response, maritime links, aviation, remote industrial sites and service continuity. Terrestrial networks remain more efficient and economical in dense areas.

What are the main risks?

The main risks involve dependence on a few private constellations, radio interference, spectrum rights, orbital debris, satellite end-of-life management, light pollution and geopolitical restrictions on sensitive components.