Will try to keep this simple...
My router is upstairs
My laptop stays upstairs as I no longer have battery, so I leave it on power when needed.
My iPad is used mainly downstairs because of above situation
But.....when downstairs, I keep losing connection, and have to carry it towards stairs, and it re-connects
Any ideas please, AND I must stress, this did not happen with laptop, so router is fine, I live 1/2 mile from a BT main exchange