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KOALATYAUSTRALIA

In-building distributed antenna system

Coverage taken from a rooftop donor link and distributed through the building on one riser, so below-grade floors and lift shafts are served as well as the floor plates.

RFI's DAS range runs from a single-antenna repeater to a full in-building distribution. The riser here is ANDREW HELIAX, the line Koalaty pairs with RFI active equipment, and the distributed antennas are RFI low-PIM dipoles.

DONOR LINK
698 – 890 MHz
AMPLIFIER
800 – 890 MHz, band selective
RISER
7/8 in HELIAX
ANTENNAS
400 – 520 MHz low PIM
DISTRIBUTION
Coaxial riser

PRINCIPAL PARTS

System schematic

VERTICAL SECTION — NOT TO SCALE

Select a numbered callout to see the equipment at that position and its published specification. Keyboard: tab to a callout, press Enter.

In-building distributed antenna systemSection showing a rooftop donor antenna, a ground floor equipment room, a single coaxial riser serving each floor plate, the lift shaft and the below-grade levels.GRADEL4L3L2L1GFB1HEADENDCOAXIAL RISERLIFT SHAFTBASEMENTTO FIRE PANELCallout 1 — Rooftop donor antennaDirectional donor antenna on the roof, aimed at the serving base station site.1Callout 2 — Headend, equipment roomFiltering and amplification in the ground floor equipment room.2Callout 3 — Coaxial riserOne HELIAX riser from the headend to the top floor and down to the basement slab.3Callout 4 — Distributed floor antennasLow-PIM dipoles on each floor, positioned against the floor plate.4Callout 5 — Lift shaft coverageA shaft antenna so a stalled lift car can be talked to from the fire control room.5Callout 6 — Basement and below gradeBelow-grade floors served entirely from the riser, with no path to the outside.6Callout 7 — Monitoring and fault reportingSystem status and fault reported to the fire indicator panel.7
CALLOUT 01DON-01

Rooftop donor antenna

Fifteen-element yagi on the roof, aimed at the serving base station site. Front-to-back ratio isolates it from the antennas inside the building.

SUPPLIED PRODUCT
YW15-6989
15 Element Yagi, 698–890 MHz
FREQUENCY
698 – 890 MHz
ELEMENTS
15
POWER
100 W
VSWR
< 1.8 : 1
SYSTEM
Building
VIEW
VERTICAL SECTION
CALLOUTS
7 positions
PARTS CITED
7 of 7

Where this applies

  • 01Buildings where the serving site is in range of the roof but the structure blocks the signal internally.
  • 02Below-grade floors and car parks with no path to the outside, served entirely from the riser.
  • 03Lift shafts, where a stalled car must be reachable from the fire control room.
  • 04Base build or retrofit, with the riser sized for the services the owner expects to add later.

Equipment in this system

Every numbered callout on the schematic names a real RFI part. Select a callout to open its published specification, or browse the full range in the catalogue.

Browse the product catalogue

Request a quote

Send the part numbers and quantities you need. If you are working from a specification or a bill of materials, attach it in your reply to our acknowledgement and we will price it as listed.

TERRITORY
Asia and EMEA
BRANDS
RFI · ANDREW · RFS

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