POYNTING HELI-40 is a circular polarised, bi-directional dual-band Wi-Fi antenna for mines and tunnels. Circular polarisation helps the signal propagate around tunnel bends in non-line-of-sight conditions, and the left- and right-hand circular polarised elements provide MIMO decorrelation.
Features
- Dual-band Wi-Fi: 2400–2500 MHz and 5000–6000 MHz, 4.8 dBi peak gain
- 2x2 MIMO with left-hand (LHCP) and right-hand (RHCP) circular polarisation
- Bi-directional – radiates in both directions along the tunnel
- Supports Wi-Fi standards 802.11g/n/ac/ax
- Rugged UV-stable ASA radome, IP68 and IK10, flammability rating UL 94-HB
Technical specifications
- Frequency bands: 2400–2500 MHz and 5000–6000 MHz
- Gain: 4.8 dBi (peak), VSWR < 2:1, isolation < -20 dB
- Impedance 50 Ω, maximum input power 10 W
- Connectors: N-type male on factory-fitted RG58 cables
- Dimensions: 253 × 128 × 144 mm
- Operating temperature: -40 °C to +70 °C, humidity up to 98 %
- Wind survival up to 220 km/h, salt spray MIL-STD 810G / ASTM B117
Applications
- Mining vehicle and machinery communications, telemetry and automation (M2M and IoT)
- Underground vehicle tracking and personnel safety in tunnels
- Industrial factory automation and robotic machinery telemetry
Installation
The antenna is mounted with a threaded spigot (clamping thickness up to 60 mm) or with adhesive surface mounting. A magnetic mount base kit (A-MBK-0001, MBK-1) is available separately.