Communications engineering. UWB is a close-up range radio technology which can cover distances up to 10 meters, used for the wireless connection of devices in the home or office. It works with a very wide band width (> 500 MHz) and extremely low transmission energy (max 10 nW allowed in Germany) in the frequency range of 6.0 - 8.5 GHz. This frequency band is already assigned to other services. Due to the extremely low transmission energy of UWB the disturbance of other devices is unlikely and therefore the frequency range can be used multiple.