This is huge...
https://www.yahoo.com/finance/news/rese ... 53865.html
Researchers at Dartmouth University have found that a 3D printed shape covered in aluminum foil can improve wireless range and increase Wi-Fi security. The project, which appeared on Eurekalert, involves placing a reflector on and around a Wi-Fi router's antennae to shape the beam, increasing range and preventing it from passing through to unwanted spaces.
"With a simple investment of about $35 and specifying coverage requirements, a wireless reflector can be custom-built to outperform antennae that cost thousands of dollars," said Xia Zhou, a Dartmouth assistant professor.
The team found that their reflectors could accurately shape Wi-Fi beams to avoid some spaces and favor others, thereby increasing security and coverage. For example, you could shape your beam to avoid going out a window into the street but be stronger in a room nearby.
Sidd