In a device (11) for switching RF-signals in a radio unit (DRU) there is provided an RF matched card holder (12) for mounting on a printed circuit board (PCB) of the radio unit, said card holder having multiple signal coupling contact elements (15) supported therein; an RF matched switch card (13) to be received in alternative positions in the card holder; multiple sets of contact pads (16 and 17, respectively) on at least one side (13A, 13B) of the switch card; and signal paths (SP) extended between selected contact pads of each set.