An estimation of the backdoor coupling of UWB pulses on commercial wireless USB adapters

This paper describes the performed measurements to estimate a possible backdoor coupling on commercial wireless USB adapters using the 2.4 GHz ISM band caused by UWB pulses. Different commercial adapters (Bluetooth and WLAN) have been stressed by UWB pulses in a GTEM cell by using different setups. The coupled voltage into the different USB conductors (Data+, Data- and VCC) has been measured and compared to the standard voltage levels of the USB connection. It has been shown that backdoor coupling of the UWB pulses can have wide influences on the wireless USB adapters.