SEMI has carried out the installation of DAS systems to provide mobile network coverage in the Camp Nou, Mestalla, and Riazor stadiums. These installations involved deploying small-sized antennas distributed throughout various areas of the stadiums, with coaxial feeder lines converging into multiple equipment rooms (Base Stations) strategically located within the facilities.Transmission to these equipment rooms was achieved through the installation of fiber optic links, which ultimately converge into the network backbone.