In-Building DAS places its own demands on the antenna: the link budget, the interference environment and the physical install all differ from a generic rf coaxial cables and assemblies deployment. This page works through those requirements and maps them onto specific models.
What the application demands
DAS antennas are deliberately low gain: each one serves a small area cleanly and hands over to the next. Uniform coverage with predictable overlap beats maximum coverage from any single point.
Turning that into a specification
- Take the operating band from the radio datasheet, including any guard at the band edges.
- Decide the coverage shape first, omnidirectional or sector, and only then take the highest gain that still fits it.
- Measure the feedline run and subtract its loss before comparing antenna gain figures.
- Confirm the connector on the radio and order the matching interface rather than adapting in the field.
Models used for In-Building DAS
| Model | Band (MHz) | Gain | Polarization | Length | Connector |
|---|---|---|---|---|---|
| AW-PA1722-V18B65 | 1710–2170 | 18 dBi | Vertical | 1120 mm | N-Female |
| AW-PA1722-V15B65 | 1710–2170 | 15 dBi | Vertical | 620 mm | N-Female |
| AW-PA1722-V12B65 | 1710–2170 | 12 dBi | Vertical | 330 mm | N-Female |
| AW-WM2400-18 | 2400–2483 | 18 dBi | Vertical | 305 mm | N-Female |
| AW-WM1922-14 | 1920–2170 | 14 dBi | Vertical | 225 mm | N-Female |
| AW-ID0827-11 | 698–2700 | 11 dBi | Vertical | 295 mm | N-Female |
| AW-ID0827-9 | 698–2700 | 9 dBi | Vertical | 295 mm | N-Female |
| AW-WM0912-9 | 902–928 | 9 dBi | Vertical | 210 mm | N-Female |
| AW-ID0827-5 | 806–2700 | 5 dBi | Vertical | 185 mm | N-Female |
| AW-ID0827-3 | 806–2700 | 3 dBi | Vertical | 185 mm | N-Female |
| AW-WM5158-23 | 5725–5850 | 23 dBi | Vertical | 305 mm | N-Female |
| AW-WM0433-6 | 428–438 | 6 dBi | Vertical | 255 mm | N-Female |
Grounding and surge protection
The coax run is where the surge arrestor is installed, typically at the building entry, bonded to the single-point ground.