In-building dual-polarized antenna apparatus components, assemblies, and methods for manufacturing and utilizing the same. In one embodiment, the dual-polarized ceiling mount antenna apparatus comprises a multiple input, multiple output (MIMO) device and is constructed to meet one or more aesthetically-related design goals such as e.g., being visually appealing. Specifically, only the horizontally polarized antenna element of the exemplary MIMO apparatus is visible as the remainder of the MIMO antenna apparatus is hidden from view above a ceiling tile. Moreover, the radome of the horizontally polarized antenna element is manufactured from a substantially translucent polymer cover and includes a “thin” radiating mesh. Resident above the ceiling tile, and normally obscured from view, is a vertically polarized antenna element along with an optional reflector element. Performance characteristics of the MIMO antenna apparatus and methods of manufacturing and using the aforementioned MIMO antenna apparatus are also disclosed.