Would adding aluminium foil behind the WiFi router concentrate the signal and increase the gain of the antenna in one direction? - Quora
Would adding aluminium foil behind the WiFi router concentrate the signal and increase the gain of the antenna in one direction? - Quora
![Boost WiFi Signal range through walls get better Internet connection using aluminum tin foil disk - YouTube Boost WiFi Signal range through walls get better Internet connection using aluminum tin foil disk - YouTube](https://i.ytimg.com/vi/RLkAVHYPnE4/sddefault.jpg)