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As military and commercial operations become increasingly dependent on satellite communications, protecting those links from interference has become a growing challenge. Modern electronic warfare systems can jam satellite signals, disrupt communications, and degrade command-and-control networks. The problem is especially significant for emerging constellations of smaller satellites in low Earth orbit, where power, size, and weight are tightly constrained.
Researchers are now developing a new satellite antenna designed to address both challenges at once: resisting electronic attacks while dramatically reducing power consumption.
According to Interesting Engineering, the system is based on a technology known as a scanning reflectarray antenna. Unlike traditional phased-array antennas, which use large numbers of active electronic components to steer signals, a reflect-array works more like a smart mirror. Incoming radio-frequency energy is reflected from a surface made up of individually controlled elements. By adjusting the phase of the reflected signals, the antenna can electronically steer communication beams without relying on power-hungry amplifier networks throughout the array.
This approach significantly reduces hardware complexity. According to the development team, the design consumes approximately 95 percent less power than conventional phased-array systems while still providing advanced beamforming capabilities.
Beamforming is particularly important in contested environments because it allows antennas to focus communications toward intended users while reducing interference from unwanted directions. The system can also generate “nulls”—areas where reception is intentionally suppressed—to reduce the impact of hostile jamming signals.
Testing demonstrated that the antenna can perform wide-angle beam steering and simultaneously support multiple users. Researchers also explored broader interference suppression techniques by reshaping sidelobes, the secondary energy patterns surrounding the main communications beam. The goal is to create larger protected zones against jamming rather than suppressing only individual interference sources.
From a defense perspective, the technology could support future low-Earth-orbit satellite constellations that require resilient communications under electronic attack. Smaller satellites typically have limited power budgets, making energy-efficient anti-jam systems particularly valuable.
One of the remaining challenges is calibration. Because reflect-arrays are less common than conventional phased arrays, researchers are still refining methods for compensating signal distortions and improving beam-control precision.
The work reflects a broader shift toward distributed satellite architectures where communications resilience, anti-jamming performance, and low-power operation must coexist within increasingly compact spacecraft.
