What is Distributed Antenna System (DASs)?

Catalina Joseph, Telecom Tech Outlook | Friday, January 08, 2021

A DAS is a system of remote antennas and managed hubs that distribute a wireless signal to a series of connected indoor or outdoor multi-technology, multi-band radio heads.

Fremont, CA: As cellular service providers look to support more subscribers utilizing data-intensive applications like video, small-cell networks are becoming necessary for providing the required capacity and coverage. As part of their outdoor network plans, service providers plan to utilize distributed antenna systems (DASs) to create the small cells they need.

DAS technology has been in the market for over 20 years. However, now, the need to do more with fewer assets is driving innovation in optical networks and DASs. DAS solutions address the requirement for small-cell delivery, and they also address efficient small-cell backhaul. Mobile operators want to implement the latest DAS and fiber technologies to create more cost-effective, leaner deployments.Top Wireless Infrastructure Solution Companies

What is a DAS?

A DAS is a system of remote antennas and managed hubs that distribute a wireless signal to a series of connected indoor or outdoor multi-technology, multi-band radio heads. At the head-end of the DAS, service providers generally locate base stations to give the cellular signal. Next, the main hub takes that signal, digitizes it, and then distributes it to other hubs and radio heads through a high-bandwidth fiber-optic network. At the antenna, the signals are converted by the radio from digital to RF and RF to digital.

The digitization of the signal on the fiber enables the DAS to transport the mobile signal at full strength to any remote antenna connected, regardless of how far away it is from the base station and main hub. This is the opposite of older, analog systems that transported RF signals over coaxial cabling and also whose performance diminished in proportion to the distance of the remote antenna from the main hub.