A concealed vehicular carbon fiber reinforced polymer (CFRP) cavity in the roof which contains antennas isproposed, prototyped and measured. Compared to state of the art roof mounted shark-fin modules this offers significantly more room for antennas and radio frequency hardware, thus enabling a smooth transition of vehicular connectivity towards 5G. Three antennas were prototyped and embedded in the cavity: Two laser direct structured (LDS) antennas (inverted-F antenna for 2GHz, monopole for 5.9GHz), as well as a broadband conical
monopole antenna milled from brass that characterizes the feasible frequency range from 2 to 6GHz by measurement. It is shown that near-omnidirectional radiation from the concealed automotive antenna cavity is achievable.
