PA HELI-22-V2-02, Bi-Directional, Dualband MIMO Tunnel Antenna

Part #: PA A-HELI-0022-02

Circular Polarised, 2x2 MIMO, Bi-Directional Mine/Tunnel Antenna; Dual-port Wi-Fi 2400 - 2500 MHz, 9 dBi; 5000 - 6000 MHz, 11 dBi. Incl 2x HELI-19, BRKT-45, BRKT-47
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Product Overview

The HELI-22 forms part of a series of MiniHELI antennas. These antennas are only mini in size relative to their bigger brothers, the HELI-3, HELI-4 & HELI-8, but offer medium to high gain, which makes these antennas ideal for mining tunnels where IoT/M2M connectivity is deployed and can also be used for coverage into the stopes.

The HELI-22 is a set of dual 2.4GHz and 5GHz antennas, radiating in both directions (i.e. bi-directional), which make them ideal for the coverage of both 2.4GHz and 5GHz in mining and other type of tunnels. These antennas are typically used for the deployment of IoT within the tunnel to provide telemetry and mine automation. The Left Hand Circular (LHC) and Right Hand Circular (RHC) polarised antenna elements provide optimal decorrelation within a MIMO deployment when using the BRKT-45, resulting in the best of the two worlds; decorrelation due to the polarisation difference and spatial diversity to enhance MIMO performance and RF reliability to service the most severe connectivity within a demanding mining tunnel. The dual-band Wi-Fi connection propagates around tunnel bends in a Non-Line Of Sight scenario and provides immunity to many Wi-Fi signal disrupting objects such as trains and drilling machinery which appear to obscure the tunnel.


  • Four port 2.4GHz and 5GHz antenna
  • This antenna is especially designed for mining and other types of tunnels where rapid extension of network is required
  • Bi-directional – radiates in both directions in a tunnel
  • Left & Right Hand Circular Polarised

Application Areas

  • Supplementing fibre / leaky feeder cable “Hotspots” to areas to enhance mobility or extend networks to inaccessible areas
  • Underground telemetry and automation
  • Creating of complete underground in tunnel wide data networks and internet/LTE connectivity
  • Seamless connection to personnel using cellular phones and smart devices and tablets
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