A method, base station, user equipment, radio network controller, and computer program are provided. It has an advantage of enabling significant attenuation of parasitic modulated signals carried in microwave chains of microwave devices such as those that are integrated into satellites by adding one or more 180\xb0 phase shifters between the units which do not exhibit a sufficient conducted susceptibility performance. An etching process is then performed, using the upper pattern as an etch mask, to remove unprotected portions of the underlying concentric rings. Once the dangerous driving occurs, a warning unit is turned on to send an alert.