Distributed Antenna System (DAS) – All You Need To Know | WilsonPro

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DAS stands for Distributed Antenna System, DAS are used to provide Cellular Signal into large buildings like Convention Centers, Hospitals, Schools, Stadiums, etc. Often times these larger buildings can weaken or even block the Cellular Signal from passing through.

There are two main types of DAS, Passive DAS and Active DAS.

Passive DAS, often called Cellular Signal Amplifiers, captures the incoming weak Cell Signal using a Donor Antenna and sends it through Coax Cable to the Signal Amplifier. The Amplifier boosts the Signal and distributes that improved Cell Signal out to Broadcast Antennas using Splitters.

Cellular Signal Amplifiers come in a range of various sizes to cover spaces anywhere from 5,000 Square Feet to 100,000 Square Feet.
More Signal Amplifiers can be connected to a single Donor Antenna if needed to provide adequate Signal.

Active DAS works by passing the Cellular Signal inside through Coax Cable from the Cell Phone Carrier to a Digital Conversion Unit inside the building. There the signal is converted to Optical Signal and is transferred to a Remote Access Unit which converts the Signal back to RF and distributes the Signal out to Broadcast Antennas.