If you remember transistor radios you'll also remember how the reception got really crappy if your radio antenna was near anything metalic. That's because the metal was blocking the radio signals, and the only way to get a better reception was to move the antenna away from the metal.
Wireless technology works similar to transistor radios because they both use radio frequencies. In those pictures your USB wireless dongle looks like it's surrounded by metal. So I'm not sure if it'll pickup a clean signal.