Embodiments of negative pressure wound therapy systems and methods are disclosed. In some embodiments, an apparatus includes a housing enclosing a source of negative pressure and a controller configured to operate the source of negative pressure to provide negative pressure wound therapy to a wound. The housing can also include a communications controller configured to wirelessly transmit and receive data using a communications antenna positioned on an antenna board. The antenna board can be mounted to a communications board that includes the communications controller. The antenna board can beelectrically connected to the communications board via a single connector on the communications board. The antenna's ground plane can be positioned on the communications board.