A wearable wireless communication device incorporating one or more 3D-antennas into a housing frame of the device using Laser Directed Structuring (LDS). The device dimensions are chosen as to position the antennas at optimum separation distance to limit the amount of SAR exposure to the user. One or more antennas operate in conjunction with a metal ground plane extension element of the wearable device. The metal ground plane extension is conductively coupled to a flexible printed circuit board (FPCB) ground plane of the wireless communication device. The ground plane extension element together with the ground plane provided by the FPCB effectively increases the equivalent resonant length thereof, to excite one or more resonant modes of an antenna incorporated in the device housing frame, expanding the operation bandwidth of the communication device. One or more Matching Network is used to tune the impedances of the antennas.