With CDX-TREME, RFI delivers superior antenna radiation patterns across the UHF CB band. Suitable for outback and remote applications, RFI's patented PCB-based collinear design offers the ultimate in pattern and gain stability.  

You can trust in the 45+ years of performance from RFI Antennas and that pedigree is again presented in this new antenna solution.

Superior Antenna Performance:

Higher gain across the full UHF CB band, suitable for outback and remote applications. RFI's patented PCB-based collinear design offering the ultimate in pattern and gain stability. True multi-band coverage - Ideal for regional networks.  

Larger Spring Base:

Supplied with larger rugged spring assembly for the toughest Aussie regional and commercial conditions.    

Great Looking, Extremely Rugged:

Both the antenna whip and the spring base are designed for high vibration, low maintenance applications with whip protection locking mechanism (grub screw).     

Safe and Secure:

Removable whip system for ease of removal in low-height environments, such as multi-story car parks, car washes, or for security.    

Key Features:

• 0.6m full length
• Bottom fix spring base with large nut and star washer
• Black antenna whip and spring with subtle blue band at the bottom - offering a nod or appreciation to RFI's Australian engineering team for designing the world's best mobile antenna
• FME(M) straight Jack on 5m coaxial cable
• Also supplied with UHF(M) plug adaptor

Purpose-built for 4x4s, SUVs and UTEs, the new CDX-TREME Ruggedised Cellular Antenna features a significantly larger, heavy-duty spring built to withstand the toughest terrains and offering a true rugged aesthetic. Its reinforced ferrule architecture ensures unmatched durability and stability, even under extreme off-road conditions. This antenna doesn’t just perform — it makes a statement.     

At the heart of the CDX-TREME is RFI’s patented Meander™ PCB technology, designed and manufactured here in Australia and proven to provide superior performance in the most remote locations. Housed within an enlarged radome that’s meticulously engineered to deliver exceptional RF performance, mechanical resilience and long-range connectivity with any radio across the UHF 477 MHz CB band,

Developed by RFI’s world-class antenna engineering team, the CDX-TREME antenna sets a new benchmark in rugged cellular connectivity — combining cutting-edge innovation with uncompromising reliability. Built tough, performs stronger and looks the part — this is Australian engineering at its finest, ready to tackle the outback and beyond.  

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