Advanced wireless communications tag reflects signals among industrial machines at high frequencies using no battery power

https://www.eurekalert.org/news-releases/1069750

"low-cost, efficient real-time monitoring, like tracking manufacturing robots' condition/ detecting refineries' gas leaks... backscattering central reader sends signal to sensor tag gathering information, tag reflects back to reader... sub-THz high frequency enables less signal confusion when more signals introduced... high-speed, broad bandwidths... antennas allow automatic signal direction change responding to frequency change... smart cities (monitor air quality, traffic flow/ sign placement), agriculture (soil sensors)"