High-gain dual-band tunnel antenna delivering stable circular-polarised Wi-Fi connectivity

This compact Mini-HELI antenna system provides strong, reliable Wi-Fi coverage in underground tunnels, mining corridors and industrial shafts. Supporting both 2.4 GHz and 5 GHz bands, it uses circular polarisation and a bi-directional radiation pattern to ensure consistent connectivity along tunnel paths, even around bends or in non-line-of-sight conditions. Designed for demanding IoT, M2M, telemetry and automation networks, it offers medium-to-high gain performance and enhanced MIMO decorrelation when deployed as a multi-antenna system.

Key Features

• Dual-band Wi-Fi performance: Supports 2400–2500 MHz (9.5 dBic) and 5000–6000 MHz (13 dBic) for comprehensive underground coverage.
• Circular polarisation: Available in both LHC and RHC for improved penetration, stability and MIMO decorrelation.
• Bi-directional radiation: Radiates effectively in both directions along a tunnel for uniform coverage.
• Enhanced MIMO deployment: Works seamlessly in 4×4 or 8×8 MIMO configurations when paired with the BRKT-46 mounting bracket.
• Strong non-line-of-sight performance: Maintains connectivity around bends and through obstructions such as vehicles, trains and mining machinery.
• Rugged IP65 design: Dust- and water-resistant construction suitable for harsh underground and industrial environments.
• Ideal for IoT and automation: Commonly used for telemetry, mine automation and wide-area underground data networks.

This antenna system provides dependable, high-gain tunnel coverage with advanced polarisation diversity, making it ideal for mining operations requiring robust Wi-Fi and IoT communication.