In the telecommunications industry, a VHF Optical Distributed Antenna System (DAS) is a fiber-optic-based signal distribution solution designed to extend and enhance Very High Frequency (VHF) band coverage—typically in the 136–174 MHz range—across large, complex, or shielded environments.

Unlike traditional coaxial-based systems, an optical DAS converts RF signals into optical signals for transmission over fiber optic cables, enabling ultra-low loss, long-distance transport, and centralized management of multiple remote units. This architecture is widely adopted for public safety networks, airport communications, railway dispatch systems, and industrial private LTE/PMR networks, where reliable, interference-free VHF connectivity is mission-critical.

The ATNJ VHF Optical DAS System is a comprehensive fiber-optic repeater solution consisting of two primary modules:

• Main Unit (MU) – A 2U 19" rack-mountable optical server that interfaces with the donor base station
• Remote Unit (RU) – An IP65-rated remote radio head supporting wall or pole mounting for outdoor deployment

• Multi-band system support
• Optical transmission up to 10km (maximum)
• OMS Lite local/remote control support
• Low noise and high reliability operation
• Each master unit supports up to 8 remote units
• Donor signal parameter monitoring for easy optimization and troubleshooting

Located in Guangming District, Shenzhen, Shenzhen A T N J Communication is a professional RF manufacturer with 16 years of experience in R&D, production, manufacturing, sales, and technical services. Our main products include Digital LTE/NR series repeaters, SDR core boards, passive devices, Digital DAS systems, and technical solutions for Public and Private (VHF, Tetra) network base stations and wireless frequency modules.

We provide OEM and ODM services for various RF projects, including wireless repeaters, multi-frequency DAS systems, remote network management center OAM, and equipment provision for indoor and outdoor signal coverage projects.

Our digital repeaters now support 12 subbands simultaneously with local and remote control and monitoring capabilities. These products are supplied to signal operators and communication integrators worldwide, providing signal coverage solutions for residential areas, office buildings, supermarkets, basements, and rural areas.

We have successfully introduced mature digital band-selective repeaters to overseas mobile operator markets. Our product field extends to Public Safety and Low Altitude Economic construction applications, including Public and Private Network Digital Multi-subband Repeaters, wireless signal repeaters, Integrated Base Stations, civil countermeasures, and phased array radar technology.

Furthermore, we have realized Digital fiber multi-frequency, UHF, Tetra, VHF, and Microwave frequency shift repeaters. As technology progresses, we continue to develop easier-to-use, more functional, and intelligent RF products. We look forward to collaborating with you to create a brighter future together.