How Distributive Antenna Systems Work
Although the idea for distributive antenna systems has been around for quite a few years, it’s the increased use and application of wireless technology that has really brought this system to the forefront today. Here’s some important information about how these systems work, as well as the advantages of using them.
What is a Distributive Antenna System?
A distributive antenna system (DAS) is a network of antennas that are all connected to the same source in order to increase coverage in areas that may be hard to get service to otherwise. Instead of using a single high-powered antenna, a group of lower-powered antennas is used to reduce delay spread and fading. This creates a line-of-sight for the antennas that are spaced out consistently, helping to overcome things like shadowing and penetration losses. DAS makes coverage possible in situations where topography, zoning laws, or building structures are prohibiting other technologies from doing so.
Although the idea was first written about in 1987, the DAS hasn’t been used widely up until recent years. Prior to that, tunnel transmitters and leaky feeders were the primary ways of providing reception in tunnels, subways, mines, and indoor and underground spaces.
Advantages of Distributive Antenna Systems
Common advantages of this method include:
- Coverage that is better defined
- Coverage with fewer gaps or holes
- Data and voice service coverage is available
- Using less power for the same coverage
- Antennas do not need to be as high since there are more of them
As communication systems are going more wireless, you may want to consider using a DAS to meet your coverage needs. Using the building and a DAS is a great way to provide consistent coverage as opposed to relying on voice and data service providers. It’s a great way to make sure that there’s consistent cell phone coverage in malls, stadiums, high-rise buildings, and the like.