Good USB 2.4/5 Ghz n card for testing

I'm looking for a USB WiFi stick/box with as many of the following features as possible for testing and site surveys, any suggestions?

1. 2.4/5 Ghz
2. External antenna port so that I can attach a directional antenna
3. Compatible with XP and Linux - no funny drivers needed


It would be nice if this could plug in to my Android phone too, but I don't know if that's possible. It would be nice to not have to lug around the laptop.

It would also be nice to see and/or communicate with 5 Ghz radios such as Tranzeo, Ubiquity, and Soletec.

Any ideas? Thanks!

You'd be better off using a portable 12 volt power supply and UBNT Bullets AirMax with assorted antennas. Taht will also give you a basic spectrum analyzer.

Thanks WHT, but I'm after something easier to walk around with when I'm in a crowded area.

My Android phone works pretty well for quick and dirty testing, but doesn't do 5 Ghz and I can't hook a small directional antenna to it.