Day Wireless Systems provides DAS Solutions for the following applications:

Public Safety DAS – Emergency Responder Radio Provide in-building radio coverage for First Responders to meet NFPA, IFC, and local code requirements.

Cellular Systems (Engineered Cellular DAS) for Large Buildings or Additional Capacity

Fully designed cellular DAS systems for one or all major cellular carriers. Requires carrier approval.

Cellular Boosters (Non-Engineered or Lightly Engineered DAS) for Small to Medium Buildings

Off the shelf commercial boosters are the answer for small to medium sized buildings on a budget or customers who require quick turnaround.

What is a Distributed Antenna System (DAS)?

A DAS is the transport medium to provide or extend coverage for RF networks like cellular and two-way radio within buildings or large structures. Typical components of a DAS are explained below:

DAS Diagram

  1. Outdoor Antenna
    Mounted high on the exterior/roof of the Building, the antenna is used to capture the macro signal and transmit signal back to the tower. These antennas are mounted in the direction of the optimal cell or radio tower.
  2. Outdoor Coax Cable
    Outdoor coax cable will need to be UV rated to survive the elements. 
  3. Indoor Coax Cable
    Indoor coax cable is typically plenum, which is required in many jurisdictions. Typically, any vertical coax run will require additional fire protection rating.
  4. Bi-Directional Amplifier (BDA) Unit
    The BDA takes the signal from the outdoor antenna, amplifies it, and redistributes it through the DAS. Battery backup systems and NEMA rated enclosures are required for this unit for public safety.
  5. Splitters & Tappers
    Splitters typically divide the signal evenly, splitting the signal strength 50/50. Tappers provide the same splitting function only with the ability to attenuate the tapped feed allowing a more managed power allocation for downstream antennas. A properly designed DAS will have even power distribution throughout the building.
  6. Jumper Cables
    Jumper cables help with ease of installation
  7. Indoor Antenna
    Provide RF access to the cellular or Public Safety Radio end users via the DAS. Low profile antennas are available for more discreet installations.