Amphenol Interconnect India Pvt Ltd. Supplies Radiating Coaxial Cables for Underground Application. Amphenol Interconnect India Pvt Ltd. Is an ISO 9001:2000 certified company. Radiating Coaxial Cables for Underground Application is very similar in construction to coaxial cable which allows controlled levels of RF energy to be radiated out of or into the cable. Radiating Coaxial Cables for Underground Application is used to solve RF coverage problems in limited areas such as tunnels buildings. These radiating cables are functioned as extension antenna.