Scientists Report Compact Weapon Prototype Capable of Disrupting Low-Orbit Satellites

New research published in a Chinese scientific journal describes engineering advances in high-power microwave technology—raising questions about the future vulnerability of satellite constellations like Starlink

Researchers at China's Northwest Institute of Nuclear Technology have developed what they describe as the world's first compact driver for a high-power microwave (HPM) weapon system capable of delivering 20 gigawatts of power for up to 60 seconds—a dramatic leap in duration compared to existing systems.

The device, designated TPG1000Cs, measures just four meters long and weighs five tonnes—compact enough to potentially be mounted on trucks, warships, aircraft, or even satellites, according to a paper published December 30 in High Power Laser and Particle Beams, a Chinese peer-reviewed scientific journal. The research team, led by Wang Gang from the Key Laboratory on Science and Technology on High Power Microwave at the Northwest Institute of Nuclear Technology (NINT) in Xi'an, Shaanxi province, reported the system has already accumulated more than 200,000 operational pulses during testing.

The researchers achieved this performance through several design breakthroughs. They replaced high-strength steel components with aluminum alloy, reducing the system's weight by approximately one-third. Insulating plates were etched with wavy grooves to lengthen the electrical surface path and prevent discharges—a principle analogous to how winding mountain roads prevent vehicles from taking dangerous shortcuts. Perhaps most significantly, the team redesigned energy storage components from traditional long, straight tubes into a dual-U-shaped structure that allows energy to "bounce back and forth," achieving equivalent performance in half the physical space.

These innovations reportedly enable the TPG1000Cs to deliver up to 3,000 high-energy pulses in a single session—far exceeding the capabilities of comparable systems. For context, Russia's Sinus-7 driver, according to available reports, can operate for approximately one second while delivering roughly 100 pulses per burst and weighs around 10 tonnes.

The development arrives amid growing strategic concerns about satellite constellations in low Earth orbit (LEO). Chinese military researchers have repeatedly warned that systems like SpaceX's Starlink pose national security challenges due to their potential military applications—including battlefield communications, precision navigation, and intelligence gathering.

Experts cited in the South China Morning Post report estimate that ground-based microwave weapons with outputs exceeding 1 gigawatt could severely disrupt or potentially damage Starlink satellites operating in LEO. This vulnerability is heightened by SpaceX's recent decision to lower Starlink satellites' orbital altitude to reduce collision risks—a move that inadvertently brings them closer to potential ground-based directed-energy threats.

HPM weapons operate by emitting focused electromagnetic energy that can penetrate electronic systems through antennas or other apertures—a phenomenon known as "front-door" coupling—potentially frying circuitry or causing temporary disruption without physical destruction.

Critical context often missing from sensationalized coverage: the TPG1000Cs remains a research prototype documented in a scientific journal, not a confirmed operational weapons system deployed by the People's Liberation Army. Publication in an academic venue suggests this represents an engineering milestone in component development rather than a battlefield-ready capability.

Furthermore, successfully disrupting satellites in controlled laboratory conditions differs substantially from reliably engaging fast-moving targets hundreds of kilometers away through Earth's atmosphere—a challenge involving precise targeting, power projection over distance, and overcoming atmospheric attenuation of microwave energy.

China's interest in counterspace capabilities reflects broader global trends. The United States, Russia, and other spacefaring nations have long researched directed-energy weapons for both defensive and offensive applications. What makes China's reported progress notable is the claimed combination of high power output, extended duration, and compact form factor—attributes that could theoretically enable more flexible deployment options if the technology matures.

Beijing has expressed particular concern about Starlink's integration with Western military operations, including its documented use by Ukrainian forces during the Russia-Ukraine conflict. Chinese defense analysts have published papers exploring various "Starlink killer" concepts, including lasers and electronic warfare systems, as potential asymmetric responses to proliferated satellite constellations.

While the TPG1000Cs represents a significant engineering achievement on paper, numerous hurdles remain before such technology could transition from laboratory prototype to operational weapon system. These include power generation requirements, thermal management during sustained firing, precise targeting systems for orbital objects traveling at approximately 27,000 kilometers per hour, and the political consequences of demonstrating anti-satellite capabilities that could trigger debris-generating conflicts in space.

As satellite constellations become increasingly vital to both civilian infrastructure and military operations worldwide, developments in counterspace technology will continue to shape strategic calculations—and underscore the fragility of our orbital commons. For now, the TPG1000Cs stands as a reminder that the next battlefield may extend far above our atmosphere, where invisible beams of energy could determine the outcome of future conflicts.