The present disclosure relates to an antenna
assembly comprising an antenna structure and a substrate. The antenna structure may be formed from a single continuous
metal piece. The antenna structure may include at least one
slot antenna formed in the single continuous
metal piece. The substrate may include at least one
dielectric layer and a
waveguide including a metallized cavity extending through the at least one
dielectric layer. The antenna structure may be attached to the substrate, may be disposed at an upper surface of the substrate, and may cover the metallized cavity of the
waveguide. The substrate may be a
printed circuit board (PCB) substrate, an in-mold electronic (IME) substrate, a
molded interconnect device (MID) substrate, or another suitable substrate.