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  • Performance testing of Radiax
  • Coordination of installation
  • Installation of radio repeater and antenna system
  • Field Quality Control
  • Test the operation of first responder radio repeater network
  • Provide test result documentation

YYC Airport Underpass

Comtech Services

Engineering     |     Project Management     |     Field Operations


More than six Canadian football fields long, 36 metres wide, and 12 metres deep, Calgary's Airport Underpass will house six lanes of vehicular traffic and two lanes for the city's LRT. It is one of the very few traffic tunnels that runs below an airport runway.

Due to the volume of traffic that will pass through it upon completion, it is critical that the first responders' radio systems - including Calgary's EMT, police, and fire department - cover the tunnel in the event of an accident. This allows emergency personnel to communicate with each other, as well as their base system.

How Comtech Helped

Because of our expertise with a unique type of cable suitable for underground systems, called radiax, Comtech's Engineers were called in. Very few other companies offered the manpower or experience required to handle a project of this size and complexity.

Comtech designed, supplied, installed and tested a BDA (bidirectional amplifier) radiax antenna system to redistribute first responder radio signals. Future-focused, the system was designed to be compatible with existing frequencies, as well as Alberta-wide frequencies that will be used in years to come.


Because of the critical nature of the communications involved, our highly skilled engineers worked with our Project Management and Construction Group ensure the system was redundant, and would report and cover the entire tunnel even if one half failed.

As one of the most critical aspects of the Airport Underpass, we were able to complete the system on-time and on-budget.

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