If you want to understand what a Distributed Antenna System (DAS) is, read our previous blog HERE. Now, let’s go a little deeper and explore the three main types of DAS architecture.
Passive, Hybrid, and Active DAS as well as some bonus information on other less known options like Digital DAS and Small Cells.
Each system type has its own strengths depending on your building’s size, layout, and technical requirements.
Passive DAS
Passive DAS uses coaxial cable, splitters, and antennas with no powered equipment beyond the central signal source.(Repeater or BTS)
Pros:
- Simple and reliable = low failure rate
- Cost-effective to install and maintain
Cons:
- Can be bulky to install in space-constrained risers
- No remote monitoring = faults are often detected late if at all
Hybrid DAS
A mix of Passive and Active, Hybrid DAS uses fibre-fed remotes to carry the signal further, then converts it back to coaxial for final distribution.
Pros:
- Smaller cable footprint in risers
- Active components can be monitored remotely
Cons:
- Higher upfront costs than Passive
- Still has some Passive limitations at antenna endpoints
Active DAS
In a true Active DAS, powered remotes with fibre (or Ethernet) run all the way to each antenna with no Passive element.
Pros:
- Real-time fault detection, right down to the antenna
- Flexible layouts are ideal for sprawling or high-traffic zones
Cons:
- Higher power consumption
- More expensive to deploy and upgrade
Digital DAS
Still evolving in Australia, Digital DAS keeps signals in a digital format all the way to the endpoint. Think of it as fibre-connected antennas without needing to generate RF at the start.
Pros:
- Smaller equipment rooms
- Lower power and cooling needs
Cons:
- Not yet widely supported or deployed in Australia
- Requires carrier-standard alignment and specialised hardware
Small Cells
Small Cells often get lumped in with DAS, but they’re different as they act as both the signal source and distribution point for often one carrier, although some systems now can support multi carriers but with some limitations.
Pros:
- Fast to deploy in high-traffic zones
- Great for adding capacity in specific areas
Cons:
- Usually supports only one operator
- Not ideal as a whole-building solution
Key Takeaways
Choosing the right DAS architecture depends on what is feeding it, on how far your signal needs to go, how much space you need to cover, and how much budget you have.
TIP: Beware of designs that prioritise short-term savings over long-term performance. A Passive system might look cheaper upfront but if your site really needs a Hybrid or Active DAS, it’ll cost more to retrofit later.
We’re Here to Help
Ready to implement DAS into your set-up? Contact us and let our team of experts guide you every step of the way. Whether you’re managing a government building in Sydney, a school on the Gold Coast, or a hospital in rural Victoria, Digicom Wireless can help you assess your current signal strength and design a tailored solution using Cel-Fi boosters or Distributed Antenna Systems (DAS).
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