Quantum Sensor Sniffs Out Radio Signals in 3D

Researchers at the U.S. Army Research Laboratory have developed a quantum sensor the size of a paperclip that can determine the 3D direction of incoming radio signals using Rydberg atoms. Unlike conventional antenna arrays that require multiple bulky, frequency-specific antennas spaced far apart, this single compact device measures signal polarization across a broad frequency range to pinpoint signal direction within two degrees. The sensor works by injecting three reference radio signals along X, Y, and Z axes; an incoming external signal perturbs the excited atoms differently along each axis, revealing its polarization and thus its source direction. ARL has partnered with quantum technology company Infleqtion to develop a field-ready prototype, with the main engineering challenges being laser stability in harsh outdoor environments and continuous recalibration of the sensitive atoms against heat, humidity, and vibration.

Nguồn: https://spectrum.ieee.org/quantum-sensor-radio-signal-direction. 8sync News chỉ tóm tắt và dẫn link; bản quyền nội dung thuộc tác giả và nguồn gốc.