Radio Frequency Systems positions itself as the telecommunications partner of the transportation industry featuring field-proven innovations spanning in-tunnel, in-building, and outdoor wireless coverage solutions for the transportation market, including turnkey solutions for optimized communications.

For over 40 years, RFS has been providing solutions for the world’s metros, railway, road tunnels and underground mines. Today, RFS provides the most advanced active, passive and hybrid RF distribution systems for in-tunnel coverage, railway station coverage and outdoor track-side rail coverage

Radiating cables and indoor antennas

RFS’ best-in-class communications technology for the transportation market includes the broadest range of RADIAFLEX® radiating cables with superior performances, the ClearFill fibre-optic extension and distributed antenna suite, plus unrivalled point of interface technology, which are expertly scaled to match every indoor coverage need for 2G, 3G, and 4G commercial radio services as well as TETRA and GSM-R mission critical wireless services in the 400, 700, 800, 850, 900, 1700, 1800, 1900, 2100, 2400 and 2600MHz bands.

Radiating cables for tunnels

RFS’ leading-edge technology for radiating cables enables low insertion loss and excellent coupling performance, ideal for tunnels by providing maximum useful lengths of individual cable runs, to minimize total count of active equipment thus allowing cost savings. Halogen-free, non-corrosive, low-smoke, flame-retardant jacket material contributes to safe and long-term reliable operation in tunnels.

The RFS RADIAFLEX radiating cable suite provides best-fit solutions for a variety of applications including single-band and multi-band/multi-operator systems. Different cable types are available, with optimized performance accounting for project specific in-tunnel installation methods and cable positioning options.

For example, RFS offers RF ultra wideband radiating cables with no stop band from 700MHz to 2700MHz. They accommodate all current and future commercial radio and private radio services from 700MHz to 2700MHz in tunnels, including LTE, providing valuable cost savings. This ultra broadband characteristic is the result of RFS’ patented “higher order mode suppression technique” in radiating cable design.

Furthermore, RFS offers a wide range of standard and heavy duty installation accessories (hangers, clamps), specifically designed for easy cable attachment and orientation on tunnel walls withstanding harsh environment conditions (pressure, wind load resulting from high speed train movement).