Is there any USB adapter that you can plug in your PC and will convert the USB output in wireless and then have a second USB adapter that will receive the wireless signal and reconvert it to USB input? The second USB adapter would preferably have to be relatively small.
What I'm really trying to do is: a really long USB cable, but without the cable; in other words, "wireless USB". I'm trying to connect a robot that I built and that has a USB port. Of course, I could add a wireless interface but it'd be long and complicated... that's why I came up with this idea. USB hubs aren't really an option since the said robot has to move around.