Ricocheting Radio Waves Monitor the Tiniest Movements

  • Magazine Article
  • TBMG-33613
Published January 01, 2019 by Tech Briefs Media Group in United States
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  • English

Infrared motion detectors can cover only a limited amount of space, a person has to be within the detector's line of sight to be detected, and lights can go off when a person remains still for too long. Work has demonstrated that patterns made by radio waves can detect a person's presence and location anywhere inside a room. A new motion sensor based on metamaterials is sensitive enough to monitor a person's breathing.