Satellite dish is parabolic
To get the best results, the dongle has to out front at the parabolic focal point
I built one some years ago, even posted pictures, used a blade cover from a round fan, did the math for the focal point, used pvc to hold the Wi-Fi dongle at the correct point, but I stopped using that when I got my 4g unlimited internet
It's been some years
There was and Oz/New Zealand site that had a lot of info
IIRC
The used a 3ft sat dish and got a Wi-Fi connection across three miles of open water during testing