The clever hack here is to use a metal strainer as a parabolic reflector, to capture signals and focus them onto the PCB antenna in a USB WiFi dongle. The strainer is drilled out, and a USB ...

Putting a complete WiFi subsystems ... design of the antenna, which [Roger Thornton] from the Raspberry Pi Foundation discussed during last week’s last week’s Hack Chat.

while a horizontal or angled antenna is going to put out a signal that travels upward, which might be more useful in a multistory home. In worst-case scenarios, you may have to map out the Wi-Fi ...