Wireless communication device includes a conductive wall having an antenna slot. The wireless communication device also includes an antenna sub-assembly positioned relative to the antenna slot to form a multi-band slot antenna. The multi-band slot antenna includes a dielectric body and a feed trace coupled to the dielectric body. The feed trace is operably aligned with the antenna slot. The multi-band slot antenna also includes a parasitic trace coupled to the dielectric body. The parasitic trace is operably aligned with the antenna slot and spaced apart from the feed trace. The feed trace is configured to communicate at a first frequency band and the parasitic trace enables the multi-band slot antenna to communicate at a second frequency band. The first frequency band is based on a size and shape of the parasitic trace.