You might have heard about wrapping your Wi-Fi router in foil to increase signal strength, but for the hack to be effective, you will need a 3D-printed reflector. Researchers at Dartmouth College created a program that custom prints a reflector for your home after taking into account the interior layout, location of the router, areas you want the signal increased, and areas you want it decreased.
This information is fed into a program called WiPrint, which creates an optimized reflector shape for your router and home in about 23 minutes. The shape can then be fed into a 3D printer. The solution is quick and inexpensive, costing about $35 to fabricate. The reflector is covered with aluminum foil and placed around the antennas of your wireless router. While materials like copper and silver also work, aluminum is the cheapest and most accessible.
During testing, the researchers found that using a 3D-printed reflector and aluminum foil boosted the Wi-Fi signal by up to 55.1% in target areas while weakening it in others by -63.3%. This system not only increases Wi-Fi efficiency but also makes it more difficult for hackers to access your Wi-Fi by limiting the signal to particular areas of your home.
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