no, i'm not aware of any such keyboard. the major connection types are:
-bluetooth (often limited on range, receiver dongles are small)
-rf wireless (can have ranges up to 40-60ft but hard to find, dongles are larger)
-infared (straight line of sight only)
-wired
keep in mind that all of them except bluetooth require a physical connection port on your device to use (usb normally) so if your device doesnt have one or is incapable of supporting a device over usb then it wont work.
you might be able to connect using a wifi usb hub like this http://www.engadget.com/2011/08/05/iogear-usb-sharing-station-connects-to-wifi-cuts-the-cord-on-fo/ but i cannot offer any details on how to do this and if its feasible. i only saw it mentioned so passed along the information.