---
lang: "en"
title: "HELI-3 Dual Directional Circularly Polarised Mine and Tunnel Antenna"
sku: "HELI-3"
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brand: "MARCOM S.r.l."
end_of_life: "false"
---

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HELI-3 Dual Directional Circularly Polarised Mine and Tunnel Antenna Max Gain: 17.5 dBi; low-cost devices and well-known (or easily accessible) access for humans and machines.

The tunnel antenna is the ideal antenna for 2.4-2.5 GHz wireless applications in tunnels. In tests, both the data rate and range achieved with this antenna were superior to those obtained using linearly polarised panel antennas with the same gain. The robust construction of this antenna makes it ideal for the mining environment. The A-HELI-0003 is a unidirectional antenna, while the closely related A-HELI-0008 transmits in both directions.

An intrinsically safe version of this antenna is available under the code A-HELI-0003-IS. This antenna provides a low-cost network infrastructure for current voice and data needs. It is future-proof, as Wi-Fi implies low-cost devices and well-known access for humans and machines.

## Technical Specifications

- Maximum Gain: 17.5 dBi
- Robust Construction

 

 

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Source: https://shop.marcomweb.it/en/wifi-wlan/heli-3-dual-directional-circularly-polarised-mine-and-tunnel-antenna

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