Industry Solutions · Fire & Security
The RF Backbone of
Australia's Security Infrastructure
D&G Antennas — trading as Xtend Communications — manufactures and distributes 50Ω RF antennas and cable assemblies for Australia's fire and security monitoring industry. We are a manufacturer and distributor only — we do not perform field installations. Our DG900MB-HG High-Gain Multiband Omni (680–960 / 1710–2700 MHz, 7 dBi across 700–1000 MHz) is the preferred RF component for Centaur and Centair 2 monitoring modules deployed by ADT, Johnson Controls, and Wormald across commercial and industrial sites in Australia and New Zealand. Every antenna is tested before it leaves us. B2B bulk pricing from 50 units. OEM supply from 200+ units.
National security integrators
Back-to-base monitoring
Fire monitoring networks
Fire protection
Lift & elevator gateways
Emergency call systems
ATM & kiosk networks
Remote terminal connectivity
Application
Centaur & Centair 2 monitoring modules
Gain
7 dBi at 700–1000 MHz for long cable runs
Impedance
50Ω precision — no reflected power losses
Connector
TNC for Centaur; FME, SMA, BNC available
Radome
16 mm fibreglass, black or white
Testing
Every unit tested
— Applications
Critical Uplinks.
No Second Chances.
Fire Alarm Monitoring
Monitoring modules in fire alarm panels require a reliable cellular uplink to the monitoring station. The DG900MB-HG provides the gain margin to maintain link budget through plant rooms, risers, and structural concrete.
Security System Comms
ADT, Johnson Controls, and Wormald-integrated security systems depend on consistent RF uplinks. Our antennas are specified into Centaur and Centair 2 modules deployed across commercial and industrial sites in AU and NZ.
OEM Panel Integration
For security panel manufacturers requiring a certified, in-spec RF component at volume. FME, SMA, BNC and TNC terminations suit most panel modems. Custom cable assemblies supplied to BOM specification.
— Recommended Products
Specified for
Fire & Security
680–960 / 1710–2700 MHz
DG900MB-HG
High-Gain Multiband Omni
The preferred RF component for Centaur and Centair 2 monitoring modules supplied to ADT, Johnson Controls, and Wormald across AU & NZ. 7 dBi across 700–1000 MHz makes up for cable losses in plant room and rooftop installations.
Full Specs & Datasheet700–960 / 1710–2700 MHz
DG850LP-MB
Low-Profile IoT Omni
For cellular security panels where a tall whip won't suit the site. A 40 mm tapered ABS radome on a 16 mm stud; mount it on a metal surface, which it uses as its ground plane.
Full Specs & DatasheetUp to 6 GHz
Custom Cable
Custom RF Cable Assembly
Custom patch leads for routing from panel modem port to external antenna. Any length, MMCX/TS9/SMA/N terminations available. OEM procurement at 200–500+ units.
Full Specs & Datasheet— Supply Chain
Already in the Panels
You Service
D&G Antennas — the manufacturer behind Xtend Communications — has supplied RF components to the Australian fire and security industry for over three decades. If you're servicing ADT, Johnson Controls, or Wormald-maintained systems, you've already replaced our parts.
Preferred OEM Supplier
Centaur & Centair 2 Compatible
AU & NZ Distribution
Volume Pricing Available
— Get a Quote
Procurement
Made Simple
Submit your requirements below. Our engineering team responds within 1 business day with pricing and lead times.
Why quote through Xtend?
D&G Antennas — OEM supplier to ADT, JCI, Cardtronics, and Elsema. Direct to your project.
Direct to the Manufacturer
D&G Antennas makes the product. Your quote goes to the source — not a distributor or call centre.
200–500 Units Is Our Normal
Strategic pricing at 50+ units. Volume orders are our standard business — we won't blink at your quantity.
Custom Assemblies to Spec
Non-catalogue cable runs, frequency-tuned antennas, custom connector types. Quoted against your system drawings.
1-Day Response
We supply ADT, JCI, and Cardtronics — we understand what a procurement deadline means. Response within 1 business day.
50+ Units
Strategic discount applies automatically at 50 units per line item. Account pricing available for ongoing procurement.