It seems to be a universal problem with WiFi: the signal is weak or non-existent in the room where you need it most.
Sound familiar?
Dartmouth University researchers have discovered a solution for this that also raises the bar for bad actors who would like to hack into your WiFi network, as detailed in their 2017 paper.
"Judicious control of indoor wireless coverage is crucial in built environments. It enhances signal reception, reduces harmful interference, and raises the barrier for malicious attackers. Existing methods are either costly, vulnerable to attacks, or hard to configure. We present a low-cost, secure, and easy-to-configure approach that uses an easily-accessible, 3D-fabricated reflector to customize wireless coverage."
You can watch their video of how this works, below. And then go get the jumbo roll of aluminum foil at Costco or Sam's Club!