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World of Software > Mobile > The radios of the battlefield are a trap for which it transmits. In China they think they found a solution
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The radios of the battlefield are a trap for which it transmits. In China they think they found a solution

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Last updated: 2025/07/10 at 9:30 PM
News Room Published 10 July 2025
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Using radio systems for communications in a hostile environment has always involved a technical risk: Issue energy means leaving a trace. Therefore, for decades, the challenge has been to find a system that allows you to transmit information without being detected. In China they could have achieved it

According to SCMP, researchers have developed a solution that breaks with the traditional model: allows you to send data without issuing active signals. There are no radio pulses, nor do you make microwave. Everything is based on reflecting what is already in the air. The system takes advantage of the presence of radar satellites-like the Gaofen-3 and Ludi Tance 1-to use their own echoes as a means of transporting information.

It is not what is issued, but what is reflected

The key is on an intelligent surface formed by hundreds of programmable metamaterial tiles. When a synthetic opening radar (SAR) illuminates the goal – be it a tank, a ship or an airplane – these tiles manipulate the reflected signal by changing its phase: 0 ° when it is “burning”, 180 ° when it is “turned off”. That simple alternation allows you to encode messages directly in the radar echo.

It is a system that modulates what comes to it. And it does it without preventing the radar from fulfilling its function: researchers say they have managed to maintain image loyalty with a loss of less than 10 %. The platforms that use it should be able to exchange information safely, avoiding revealing its position.

Metamaterials Communication 1

Smart surface formed by programmable metamaterial tiles

Making this type of communication work far beyond playing with reflexes. The main challenge was to survive in saturated cities of signals, where electromagnetic noise floods everything, and in agitated seas, where constant balancing distorts the reflected signals. The team led by Liu Kaiyu says that It has designed algorithms capable of raising the signal/noise ratio up to 300 % and inertial sensors that correct the movement of the platforms in real time.

R24228 1
R24228 1

Metasuperficie of information combined with a passive wireless communication system

For now, everything has been tested in controlled environment: laboratory, simulations and data analysis obtained by satellite. There is no evidence that this technology is deployed on the battlefield. But Liu’s team has clear plans: try the system with real platforms and validate its resistance to signal blocking.

China's military ambition has no limits. It has just resurrected one of the great Soviet fantasies: the EkranoPlano

Its road map includes combining this technology with radars of multiple ways and creating an integrated network between space, air and floor. The ultimate goal is ambitious: build a safe communications system capable of working even in Scenarios with intense electronic warfare. The details of the research are available in an article published in Journal of Radars.

hurses | Bring out the | Xtaka conveyed with Grook | diarrhea

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