---
lang: "en"
title: "HELI-4 - Dual-Directional Wi-Fi Antenna with Circular Polarization for Mines and Tunnels"
sku: "HELI-4"
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brand: "MARCOM S.r.l."
end_of_life: "false"
---

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HELI-4 - Dual-Directional Wi-Fi Antenna with Circular Polarization for Mines and Tunnels 2.3GHZ-2.4GHZ MAX GAIN: 15 DBI

This high-gain directional antenna is an ideal complement to our MinePoynt Wi-Fi antennas for tunnels and mines. The combination of MinePoynt beam antennas for long-distance links through tunnels with this directional antenna leverages Poynting's fifteen years of experience in designing and manufacturing antennas for data networks in underground mines. This antenna is also suitable for chemical oil/gas environments where intrinsically safe (IS) equipment is required.

The tunnel antenna is the ideal antenna for 2.4-2.5 GHz wireless applications in tunnels. In tests, both the data speed and range achieved with this antenna were superior to those obtained using linearly polarized panel antennas with the same gain. The robust construction of this antenna makes it ideal for the mining environment. The A-HELI-0004 is a directional antenna, while the closely related A-HELI-0008 transmits in both directions (bidirectional). This antenna provides a low-cost network infrastructure for current voice and data needs in mines and tunnels.

## Technical Features

- Maximum Gain: 15 dBi
- Proven antenna performance ensuring maximum range in all directions
- Ideal where the polarization of other devices used may change
- High gain on the 2400 MHz Wi-Fi band
- Intrinsically safe thanks to the high-resistivity non-static radome

 

 

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Source: https://shop.marcomweb.it/en/wifi-wlan/heli-4-dual-directional-wi-fi-antenna-with-circular-polarization-for-mines-and-tunnels

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.