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5G: Researchers find mm-wave signals could power self-charging IoT devices Scientists at Georgia Tech have developed an antenna that can translate millimetre-wave 5G signals into usable electrical power. A 3D-printed antenna could turn high-frequency 5G signals into a wireless power source, potentially eliminating the need for batteries in low-power IoT devices, according to researchers at Georgia Tech. The antenna, which the researchers call a mm-wave harvester, is about the size of a playing ...

The antenna, which the researchers call a mm-wave harvester, is about the size of a playing card and has visible circuitry printed on it. It uses a technology called a Rotman lens as a waveguide to focus multiple beams of millimeter-wave electromagnetic radiation used in 5G into a coherent whole. The technology was previously best known as a component of phased-array radar systems, allowing it to see targets in multiple directions without physically moving the antenna system. It was invented in...