I've been searching this for a while and I haven't been able to find any articles on it.
Basically I was just wondering if it's possible to add a larger antenne to and iPhone/iPod in order to increase max distance for receiving wifi.
Of course, I know that most of the wifi strength depends on the router, but my macbook can pick signals much farther away than my iPod can, so I feel like there is still room for improvement that would allow usable signals from farther away.

I was thinking of the possibility of a completely external antenne, that could be self powered if needed.

Anyway, just some ideas.