Digital Fiber Optical DAS Supports 4G 5G and Emergency Services 1800/2100

1800/2100/2600MHz Active DAS Fiber Optical DAS 5G and LTE Signal Distribution

2Watt Digital Optical Repeater System 33dBm Digital Optical dual band 1800/2100/2600MHz Amplifier DAS Repeater

Distributed Antenna System (DAS) remains the most effective and reliable solution for in-building wireless coverage and capacity. Since people spend most of their time at home, in offices, or other enterprise locations, indoor wireless connectivity has become essential. Today's wireless networks must carry not only voice traffic but also large volumes of data from smartphones and connected devices. As a result, DAS system design has grown increasingly complex to meet these demands, requiring a high Signal-to-Noise plus Interference Ratio (SNIR) to achieve high throughput.

ATNJ also integrates small cells and Wi-Fi solutions into our portfolio. Small cell solutions are ideal for small to medium enterprises, delivering targeted coverage and capacity. Wi-Fi solutions help offload network traffic in hotspot areas. Therefore, ATNJ provides a complete, end-to-end wireless network coverage solution.

• Master Unit (MU) / Head-End Unit - Converts RF signals from base stations into optical signals for long-distance transmission over fiber, supporting multiple bands and operators.
• Remote Unit (RU) - Converts optical signals back to RF for indoor or tunnel coverage, featuring low noise figure and high output power.
• Optical Distribution Network (ODN) - Includes single-mode fiber cables, optical splitters, and patch panels that distribute signals with minimal loss to multiple remote units.
• Expansion Unit (EU) - Provides additional fiber ports and cascading capability, enabling scalable DAS architecture for large venues or high-rise buildings.
• Network Management System (NMS) - Software platform for remote monitoring, fault diagnosis, and real-time adjustment of each component, ensuring high system reliability.

• Low signal loss over long distances - Digital fiber optic repeaters transmit RF signals over several kilometers with minimal attenuation, ideal for tunnels, stadiums, and large campuses.
• Multi-band and multi-operator support - A single digital optical DAS can simultaneously handle 4G/LTE, 5G NR, and public safety bands, reducing infrastructure costs.
• High signal quality with low noise figure - Digital processing ensures excellent SNR and EVM, enabling high throughput and reliable indoor wireless coverage.
• Scalable and flexible architecture - Remote units can be easily added or reconfigured to expand capacity and coverage in enterprise buildings or metro systems.
• Easy integration with existing networks - Digital fiber optic repeaters support CPRI/eCPRI interfaces and hybrid deployment with small cells, offering future-proof in-building solutions.

Digital Optical Repeater System Diagram

Digital Optical DAS Equipment

Multi-band Signal Distribution

Signal Coverage Solution

DAS System Application Scenarios

Shenzhen A T N J Communication Company Overview

Located in Guangming District Shenzhen, Shenzhen A T N J Communication is a professional RF manufacturer mainly engaged in R&D, production, manufacturing, sales, and technical services with 16 years of experience. The main products include Digital LTE/NR series repeater, SDR core board, Passive devices, Digital DAS system, Technical solutions for Public and Private (VHF,Tetra) network base station, Wireless frequency modules.

Meanwhile, we undertake OEM, ODM services and projects of various RF, wireless repeaters, multi-frequency DAS systems, remote network management center OAM, and equipment provision of indoor and outdoor signal coverage projects.

Nowadays, our digital repeaters not only reach 12 subbands simultaneously with local and remote control+monitor, but also are supplied to signal operators and Communication integrators worldwide, providing signal coverage solutions for residential areas, office buildings, supermarkets, basements and rural areas.

Company Facilities and Manufacturing

More mature digital band-selective repeaters were put into overseas mobile operator markets successfully. Our product field extends to Public Safety and Low altitude economic construction applications which include Public and Private Network Digital Multi-subband Repeater wireless signal repeater, Integrated Base Station, Civil countermeasure and phased array radar technology etc. Furthermore, Digital fiber multi-frequency, UHF, Tetra, VHF, Microwave frequency shift repeaters are realized. With the progress of science and technology, easier-to-use, more functional and intelligent RF products are being developed. We look forward to collaborating with you to create a brighter future together.