Smart metasurface technology: A powerless solution to multipath signal interference, for more reliable wireless IoT

https://www.eurekalert.org/news-releases/1082003

"multipath challenges: time delays, altered amplitudes, ghosting, fading... passive metasurface-based filtering using time-varying interlocking mechanism incorporating metasurface panels/ internally coupled circuit elements, including metal-oxide-semiconductor field-effect transistors... enhances 1st incoming signal 10 dB, rejecting time-delayed signals from other angles, without active biasing/ control systems... uses simplified antenna designs/ commercial diode products, few: calculation/ modulation/ demodulation circuits"