BAL-UWB-01E3 50Ω to 100Ω Balun STMicroelectronics BAL-UWB-01E3 50Ω to 100Ω Balun integrates a matching network for ultra-wide bands of 3GHz to 8GHz. The device uses STMicroelectronics IPD technology on a non-conductive glass substrate which optimises RF performance. The BAL-UWB-01E3 is an ultra-miniature device housed in a low-profile package.