Knowledge Base

What are the differences between active DAS, passive DAS, and hybrid DAS?

Active DAS (also known as fiber DAS) typically refers to a distributed antenna system that uses fiber optic cables to connect into a wireless carrier’s network via a base station.

The high cost (typically $2.50 to $5 per square foot of coverage), lengthy implementation time (often 12 to 18 months), and required carrier approval and licensing process for most active DAS systems make this solution the right choice only for the largest buildings with high traffic (airports, large convention centers, sports stadiums, etc.).

Passive DAS uses antennas connected to one or more amplifiers via coax cables. Passive DAS systems receive wireless cellular signal from one or more antennas mounted on the roof of the building. The outdoor antennas are connected to one or more cell signal amplifiers, which boost the signal and broadcast it inside the building via ceiling-mounted antennas. Passive systems are usually implemented in small indoor building spaces.

Hybrid DAS systems (like the CEL-FI QUATRA, SureCall SignalMax, and Top Signal Fiber DAS 4400) use coax cables for passive outdoor and indoor antennas and fiber-optic cables between amplifier components. Because fiber-optic cables provide virtually zero signal loss between the receiving unit and the distributing units, hybrid DAS is able to offer scalability and coverage for large buildings at an affordable price.

Hybrid and passive DAS systems have much lower implementation costs (typically $0.75 to $1.25 per square foot of coverage), shorter implementation times (typically a few weeks), and often use carrier-preapproved equipment, making them the right choice for up to 1 million square feet.

Powerful Signal will gladly offer you a free custom quote for a cell signal amplifier solution in your building. Contact us today for more information!