Researchers have found a low-power, inexpensive way for large numbers of devices, such as machines in factories and equipment in labs, to share information by efficiently using signals at untapped high frequencies. The technology is an advanced version of a device that transmits data in a wireless system, commonly known as a tag. The new tag can support data transmission for large networks of devices using a technique called backscattering. This is where a central reader sends a signal to a sensor tag to gather information, and the tag reflects the signal directly back to the reader. The new tag is the first of its kind to use backscattering in a high-frequency range known as sub-terahertz. The technology could immediately enable low-cost, efficient real-time monitoring in industrial settings, such as tracking the condition of manufacturing robots or detecting gas leaks in refineries, by eliminating the need for power-hungry signal transmitters.