Aerpro CBA31 3dBi Compact UHF CB Antenna 477MHz 380mm Black

Aerpro CBA31 3.0dBi Compact UHF CB Antenna 477MHz 380mm Black Ground Independent Integrated Spring Weather Sealed 4.8 Metre RG58 FME Cable

The Aerpro CBA31 is a 3.0dBi compact UHF CB antenna for 477MHz radios, measuring just 380mm in total length with a plastic tube whip mast, integrated spring for vibration resistance, and weather-sealed construction. Ground independent for flexible mounting locations. Pre-fitted with 4.8 metres of RG58 coaxial cable terminated with a female FME connector, plus an FME to PL259 adaptor and mounting nut for a complete ready-to-install solution.

Product overview

The CBA31 is built for situations where antenna height or profile is a constraint. At 380mm total length it is one of the most compact UHF CB antennas available, suited to vehicles with height restrictions such as carport clearances, low-hanging branches on bush tracks, and installations where a tall antenna would foul surroundings or draw unwanted attention.

The 3.0dBi gain produces a broad, wide-angle radiation pattern rather than concentrating gain along the horizon. This broad pattern performs well in hilly, mountainous, and undulating terrain where elevation changes are frequent and signals need to reach in multiple directions rather than at a fixed elevation angle. The trade-off relative to higher-gain antennas is reduced flat-horizon range, but for off-road use and varied terrain the wide coverage is more practical.

The ground-independent design allows flexible mounting locations without compromising performance. The integrated spring absorbs vibration from corrugated roads and off-road terrain, protecting the mast and base. The weather-sealed construction handles dust, rain, and the environmental exposure typical of tough 4WD and rural use.

Features and benefits

3.0dBi broad radiation pattern - suited to hilly and undulating terrain: Wide-angle coverage in multiple directions rather than concentrated gain along the horizon, performing well in mountainous, hilly, and off-road environments with frequent elevation changes.

Ultra-compact 380mm total length - suited to height-restricted vehicles: One of the most compact UHF CB antennas available, suited to low-clearance situations and discreet, low-profile installations.

Ground independent design: Allows flexible mounting without degrading antenna performance, unlike antennas that rely on a vehicle metal ground plane.

Integrated spring for vibration resistance: Absorbs vibration from corrugated tracks and off-road terrain to protect the mast and base.

Weather-sealed plastic tube whip construction: Built for dust, rain, and the environmental exposure of tough 4WD and rural use.

4.8 metre RG58 FME pre-terminated cable included: Pre-fitted cable with sufficient length for routing from antenna to radio in most vehicle layouts.

FME to PL259 adaptor and mounting nut included: Allows direct connection to UHF CB radios using the standard PL259 antenna socket. Mounting nut included for secure installation.

Compatible with all 477MHz UHF CB radios: Suits all major brands of 477MHz UHF CB radios used in Australia and New Zealand.

Technical specs

Frequently asked questions

Why choose a 3.0dBi antenna over a higher-gain option? Higher-gain antennas concentrate their radiation pattern toward the horizon for increased flat-terrain range but sacrifice coverage above and below that angle. A 3.0dBi antenna spreads its pattern more broadly, which is more effective in hilly, mountainous, and undulating terrain where vehicles and other radios are frequently at different elevations. For remote outback flat-terrain use where maximum horizon range is the priority, a higher-gain antenna may be more appropriate.

What does ground independent mean for this antenna? A ground-independent antenna does not require a metal ground plane beneath the base to operate correctly, unlike rooftop and magnetic mount antennas that rely on the vehicle body. The CBA31 maintains consistent performance regardless of where it is mounted on the vehicle.

What is the integrated spring for? The integrated spring absorbs vibration and flex from corrugated roads and off-road terrain, reducing stress on the antenna mast and base connection. This protects the antenna from fatigue damage during extended use on rough tracks.

What connector does the cable use and what is the PL259 adaptor for? The 4.8-metre RG58 cable is pre-terminated with a female FME connector. The included FME to PL259 adaptor allows connection to UHF CB radios fitted with the standard PL259 (SO-239) antenna socket, covering the majority of fixed mount UHF CB radios.

Does the 380mm length include the spring and base? Yes. The 380mm total length covers the complete antenna assembly. The mast itself measures 335mm with a 10mm width. The mounting thread is 10mm for fitting to compatible brackets and mounts.