Tunnel Antennas are a special class of cellular antenna which have been empirically modelled to propagate 4G and 5G transmissions into underground tunnels.
A great deal of research has been conducted in optimising cellular transmission into tunnel environments. As one might expect concrete tunnels act as a form of waveguide which can be both beneficial and detrimental depending on the cross-sectional dimensions, circularity, and bends occurring. In almost all situations the use of polar and spatial diversity, and positioning of the service antennas is key to optimising performance.
From a practical perspective, these can be tough environments subjected to corrosive gasses, dust, moisture, and rodents. Powertec engage with leading antenna developers when designing tunnel-based wireless communication systems, ensuring your system is built using the right equipment.