Distributed Antenna Systems (DAS) amplify and distribute mobile phone and/or two-way radio signals throughout areas which otherwise have poor service. These systems are designed to enhance spaces, including any combination of indoor and outdoor areas, with the end purpose of providing better mobile phone and two-way radio service in key areas.
The services carried on the DAS can be fed by either a bi-directional amplifier (BDA) connected to an outdoor antenna (an “off-air” feed) or by having the carriers install a dedicated signal source. In either case, the DAS will then distribute the signal throughout the target area on a series of antennas fed via a network of cable and, for larger installations, fiber.
Outdoor DAS applications use essentially the same technologies; popular applications include open air public spaces, stadiums, and urban areas.