An antenna assembly for a vehicle includes a PCB and a ground plane disposed on a top surface of the PCB. The antenna assembly further includes a patch antenna stack including a first dielectric operatively connected to the ground plane and a first patch conductor operatively connected to the first dielectric to transmit and/or receive radio frequency signals having circular polarization in a first direction. The patch antenna stack also includes a second dielectric operatively connected to the first patch conductor and a second patch conductor operatively connected to the second dielectric to transmit and/or receive radio frequency signals having circular polarization in a second direction opposite the first direction. The antenna assembly further includes a radiating element configured to be energized to transmit and/or receive radio frequency signals having linear polarization.