hmm im not convinced this works but i would like someone to try it to clarify go on one of you Americans try it routers are cheaper there
you could try take down all of the walls in your home? on the serious note the signal can depend on the materials your home is made up off.
EDIT: I have also found this while browsing.
However, this range can significantly decrease depending on the environment you're in. Most homes constructed of wood and sheet rock aren't too restricting, but a building made of steel and concrete can cause considerable interference. Other things, like cordless phones and
microwaves can also hinder performance. So whereas I might be able to get over 150 feet from my wireless router, you might be able to go only 75 feet from your wireless router.