Disclosed is an antenna apparatus including a first subassembly having a plurality of antenna elements, and a second subassembly adhered to the first subassembly. The second subassembly may include a plurality of components of a beamforming network encapsulated within a molding material. One or more interconnect layers may be disposed on the molding material to electrically couple the plurality of components of the beamforming network to the plurality of antenna elements. Methods of fabricating the antenna apparatus are also disclosed.