Could be useful in homes, offices.
'Anti-Reflective' Coating Allows Wi-Fi Through Walls
In TechRadar, Steve McCaskill, August 18, 2022
Scientists at Austria's Vienna University of Technology (TU Wien) and France's University of Rennes have enabled Wi-Fi signals to pass through walls more effectively. The method calculates an anti-reflective invisible structure to a wall, which TU Wien's Stefan Rotter likened to "the anti-reflective coating on your pair of glasses." The researchers transmitted microwaves through a labyrinth of obstacles, then calculated a matching anti-reflective structure that almost completely removed the signals' reflection. "We were able to show that this information can be used to calculate a corresponding compensating structure for any medium that scatters waves in a complex way, so that the combination of both media allows waves to pass through completely," explained TU Wien's Michael Horodynski. ....
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