
RF Protection Devices for Critical Railway Communications ready for the transition to FRMCS
Maximum protection for demanding communications environments
The evolution of transport networks and the incorporation of technologies such as GSM-R, FRMCS, 5G, LTE, WLAN, and TETRA pose new challenges in terms of electromagnetic compatibility. The coexistence of multiple radio systems in the same infrastructure or vehicle can generate interference that compromises the availability and reliability of critical communications.
Antonics offers a comprehensive range of RF filtering solutions designed to ensure the safe and efficient operation of communication systems in rail, bus, and other transportation environments. Their filters eliminate unwanted interference, optimize communication performance, and ensure the coexistence of different wireless technologies.
Solutions ready for the transition to FRMCS
With the migration of railway networks from GSM-R to FRMCS, highly selective band rejection filters play a key role. These solutions protect critical railway services from potential interference generated by public mobile networks and 5G services, ensuring operational continuity and secure communications.
Product range
Antonics’ offer includes:
- Band rejection filters for GSM-R.
- Filtration solutions for FRMCS.
- Coexistence filters for 5G networks.
- Bandpass filters.
- DC Blockers.
- Custom-developed RF solutions for specific applications.
Competitive advantages
Antonics OmProtec® filters stand out for:
- High capacity for rejecting interfering signals.
- Minimal insertion loss to maximize signal quality.
- Robust design for demanding rail and transport applications.
- Compliance with the main international standards of the sector, including EN 50155, IEC 61373 and EN 45545-2.
- Proven reliability in critical communications applications and next-generation embedded systems.
Benefits for operators and integrators
- Effective protection of critical communications.
- Reduction of interference between different radio technologies.
- Greater availability and performance of communication systems.
- Preparation for the future implementation of FRMCS.
- Regulatory compliance in railway and public transport applications.
OmProtec® -RBF MF-05 CF-01
The Antonics OmProtec®-RBF MF-05 CF-01 is a highly selective bandpass filter that protects GSM-R communications from interference originating from LTE and 5G networks. Its design for installation in trains and vehicles ensures the preservation of critical communications, even in environments with high radio signal density.

Frequencies (MHz):
Operating range (600 – 4000)
Rejection bands:
GSM, UMTS, LTE, 5G: 694 – 3800 MHz
Marching bands:
GSM-R uplink: 873 – 880 MHz
GSM-R downlink: 873 – 880 MHz
OmProtec® -RBF 900 CF-02-5-
The Antonics OmProtec®-RBF 900 CF-02 -5- is a band rejection filter specifically designed to protect GSM-R communications from interference resulting from the deployment of 5G networks. Designed for installation on trains and other transport vehicles, this system ensures the safe coexistence of critical rail services and modern communication technologies.

Frequencies (MHz):
Working range (600 – 4000)
Rejection bands:
GSM-R, uplink: 873 – 880 MHz
GSM-R, downlink: 873 – 880 MHz
Marching bands:
GSM, UMTS, LTE, 5G: 694 – 3800 MHz



















