A typical DAS deployment consist of the following devices:


  • DONOR ANTENNA

This is mounted outdoor and has a clear view or is pointed towards the base station.


  • SERVER ANTENNA(S)

These are mounted indoors, and come in typically a dome or panel type design for transmitting and receiving the cellular
signal to and from the mobile devices indoor.


  • BI-DIRECTIONAL AMPLIFIER(BDA)

It amplifies the signal coming from a base station tower for distribution throughout a building or structure, thereby allowing users to utilize mobile phones within a facility. The BDA is the heart of the DAS setup.


There are other accessories such as Coaxial cables, Splitters, Couplers, etc. which are also standard requirements of a DAS installation.

  • ​​​​​It makes it possible to make mobile calls and browse the internet at locations that ordinarily would have been impossible to do so, e.g. subways, underground bunkers and confined spaces, marine/offshore vessels, etc.
  • Significantly improves voice and data quality to the end user mobile phone when indoors, and especially when inside highly concretized buildings.
  • It greatly reduces disconnects and dropped calls.
  • It works for all gene​​rations of GSM technologies, from 1G to the most recent 4G-LTE.
  • Connects multiple phones simultaneously, just as would a standard base station tower. 
  • Has a better and faster backhaul connection to the GSM provider's base station tower, than would your mobile phone.
  • Extends phone battery life due to less transmit power utilized by mobile phone.
  • It reduces electromagnetic radiation (EMR), generated by phones, usually caused by poor signal reception, and the phone having to transmit at high power.
  • DAS devices require very small power to operate(Wattage usually within 2 digits).

A distributed antenna system (DAS) is a way to deal with isolated spots of poor network coverage inside a large building by installing a network of relatively small antennas throughout the building to serve as repeaters. This is known as indoor DAS deployment or iDAS.

There is also outdoor DAS or oDAS. 

Advantages of DAS