Researchers develop ground-penetrating 'Wi-Fi' tech with 100m range — magnetic induction method could help reach those trapped or lost underground

South Korean researchers at ETRI have developed a groundbreaking underground wireless networking technology using magnetic induction, enabling communication up to 100 meters below the surface. This method, detailed in the IEEE Xplore journal, overcomes signal degradation issues of traditional RF methods. By utilizing a current-driven magnetic induction approach, they achieved a 100m range, surpassing the previous 40m limit. The technology could be integrated into smartphones, benefiting industries, emergency services, and national defense with improved underground communication capabilities.