Railway and Metro Antenna Solutions: LTE-R, GSM-R and Trackside 5G
Rail coverage is a chain of handovers. Every antenna on the route has to hold its pattern through tunnels, cuttings, viaducts and station concourses, and hand the train over to the next cell before the link drops. RF element supplies UHF panel and yagi antennas for 450-470 MHz LTE-R, 900 MHz antennas for GSM-R, and 3.5 GHz panels for station and depot 5G.
Three constraints that shape trackside antenna choice
Tunnels behave as circular waveguides
Above roughly 400 MHz a tunnel supports propagation modes that favour a directional source aligned with the bore. A yagi or a narrow panel placed at the tunnel mouth carries further than a broad panel, and it keeps energy off the side walls where it would return as delayed multipath.
Handover overlap must be engineered
A train at line speed crosses a cell boundary in seconds. The overlap zone between adjacent antennas is set by beamwidth, tilt and output power together, so an antenna with an unpredictable pattern makes handover tuning guesswork. Stable, published beamwidth is worth more than headline gain.
Wind, vibration and catenary clearance
Masts beside the track carry a long lever arm, and the structure vibrates every time a train passes. Mounting hardware has to resist fatigue, and the antenna must stay below the electrical clearance envelope. A mechanically weak mount will move the pattern long before it fails outright.
Antenna selection by deployment case
Rail networks usually need three separate links: train-to-ground for signalling, train-to-ground for operational data, and station coverage. Treat them as three designs. The bands below reflect the ranges our catalogue covers; confirm the exact uplink and downlink split with the signalling authority before ordering, because LTE-R allocations differ between markets.
| Antenna type | Frequency range | Gain | Typical use |
|---|---|---|---|
| UHF MIMO panel | 450-470 MHz | 9 dBi | LTE-R trackside and station coverage |
| UHF yagi | 450-470 MHz | 10 dBi | Straight tunnel sections and long cuttings |
| MIMO yagi | 900-930 MHz | 11 dBi | GSM-R links and narrow corridors |
| MIMO panel | 3300-3800 MHz | 12 dBi | Station, depot and platform 5G |
Band, gain and polarization trade-offs
The 450-470 MHz range reaches further per watt than 900 MHz and tolerates the tunnel environment, but the antennas are physically large: a 9 dBi panel at 460 MHz is roughly half a metre tall. Confirm the mounting envelope on the mast or in the bore before assuming a high-gain model will fit.
Horizontal beamwidth drives handover spacing. A 65-degree panel set for maximum gain produces a shorter overlap than a 90-degree panel at the same transmit power, so the handover study has to use the pattern of the antenna that will actually be installed, not a generic figure.
Recommended antennas
These four models cover the trackside and station cases most often specified on metro and mainline projects. Every parameter below is copied from the product specification table.
UHF MIMO Panel Antenna
UHF Yagi Antenna
900MHz MIMO Yagi Antenna
5G n78 MIMO Panel Antenna
Frequency, gain, beamwidth and connector values are taken from the linked product specification tables. Confirm the final configuration against the datasheet before ordering.
Installation and deployment notes
Trackside installation is governed by the railway operator, not by the antenna supplier. The points below are the ones that most often cause problems after commissioning.
- Aim tunnel antennas along the bore axis and keep them clear of the catenary electrical clearance envelope.
- Set handover overlap from measured pattern data, not from a rule of thumb; a 90-degree panel and a 65-degree panel need different spacing.
- Use dual-polarized antennas where the train body masks one polarization at close range.
- Bond and ground the mast and the coax entry point; trackside is a high-surge environment.
- Record the mechanical tilt and azimuth at installation so that the next shift can restore the same alignment.
Frequently asked questions
Which band is used for LTE-R?
LTE-R deployments commonly use the 450-470 MHz range, which is why our UHF panel and yagi families are built around it. Allocations are set nationally, so confirm the exact uplink and downlink edges with the signalling authority before specifying a model.
Yagi or panel inside a tunnel?
A yagi is the better choice in a long, straight bore because it concentrates energy along the axis. A panel is more practical at junctions, station ends and curves, where coverage has to be spread over a wider angle. Many projects use both in the same tunnel.
Do you supply GSM-R antennas?
Our 900 MHz MIMO yagi covers 900-930 MHz, which sits inside the GSM-R uplink range used in many networks. As with LTE-R, confirm the exact band plan for your line before ordering, and we will confirm the tuning range in writing.
Are your antennas certified for railway use?
We do not hold railway-specific type approvals or safety certifications. We supply the antenna and its mechanical and electrical data, and the operator or systems integrator carries the approval for the installed assembly.
Related technical reading
Related industries
A railway is a long thin cell with no second chance at handover. These sectors run the same linear coverage model.
What to send for an antenna shortlist
Send these five items and we can propose models with pattern data instead of a catalogue list.
- Line profile, tunnel cross-section and curve radii
- Band plan with uplink and downlink edges
- Target handover overlap and train speed
- Structure type: mast, wall bracket or catenary support
- Train body material and window layout
Send your layout, get an antenna shortlist
Send the line profile, tunnel cross-section and the band plan, and we will return a proposed antenna set with pattern data for your handover study.
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