You Can Use Aluminum Foil to Strengthen Your Wi-Fi Signal
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But we don’t 100 percent think you actually need to do this. Aluminum foil is not just for sandwiches anymore—it can also reflect the signals coming from your router’s antennas. Xia Zhou / Dartmouth College Wi-Fi signals are ubiquitous, but even though they’re invisible to us, the materials they interact with still affect them. These electromagnetic…
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Having an Amateur “extra” class license, I have to smile a bit as though any electronics buff, amateur or engineer doesn’t know you can make a reflector. Directional antennas work that way.
An aluminum can works pretty well, you know, but you can make a reliable link from an old satellite TV antenna and some junk parts that works for a mile or more.