DAS is often used in scenarios where alternate technologies are infeasible due to terrain or zoning challenges. These antennas have recently been employed by several service providers in many areas around the United States. The idea was described in a paper by Saleh et al. A single antenna radiating at high power (a) is replaced by a group of low-power antennas to cover the same area (b). 4 Placement of distributed antenna systemsĪs illustrated in the figure, the idea is to split the transmitted power among several antenna elements, separated in space so as to provide coverage over the same area as a single antenna but with reduced total power and improved reliability.
