Phase-Matched WDM RF over Fiber multi-link system

The RFOptic WDM RF over Fiber (RFoF) multi-link system represents an innovation in high-frequency signal transmission, supporting a range from a few MHz to 18GHz. This system has been rigorously tested, achieving reliable performance at multiple frequency bands including 2.5GHz, 3GHz, 4GHz, 6GHz, and 18GHz. Designed for low signal loss and precise phase matching, the RFoF system excels in challenging environments critical for communication. With a minimum detectable signal (MDS) as low as -114dBm and a low noise figure under 10dB, it ensures signal integrity. Integrated remote and local management solutions enhance usability and maintenance efficiency.

 Why use RF over Fiber and not coax?

In direction-finding applications, particularly airborne and maritime, maintaining precise phase alignment over long distances is essential. Coaxial cables face significant signal loss and degradation, compromising phase accuracy. RF over Fiber (RFoF) technology facilitates phase matching across kilometers, enabling reliable triangulation and analysis. Moreover, RFoF provides immunity to electromagnetic interference (EMI), preserving phase information integrity for applications requiring precise direction finding.

Key characteristics

The RFOptic WDM RFoF system is engineered for high performance, featuring phase matching of ±10° up to 18GHz and optional 40GHz support. It includes low-noise pre-amplifiers, achieving an MDS of -114dBm at 1MHz bandwidth. Each link maintains gain matching within ±1dB and operates stably within -40°C to +70°C. Its low noise figure allows for optimal performance in low signal scenarios. The system supports remote management via Ethernet and local management through USB, providing installation flexibility in indoor or outdoor enclosures.

Main Applications

RFOptic’s WDM RFoF system operates across an extensive frequency range, supporting signals from a few MHz to 18GHz. This bandwidth is crucial for applications in radar systems and electronic warfare. Tested successfully across bands, the system maintains integrity over distances exceeding kilometers. This capability makes RFOptic suitable for high-frequency point-to-point applications in demanding environments.

System Configuration Example

The point-to-point phase matching system is designed for precise signal triangulation and source localization using multiple RF over Fiber (RFoF) links. These links uphold phase coherence over extended distances, making them ideal for airborne and maritime settings. Each RFoF link is housed in robust outdoor enclosures, featuring transmitters that convert RF signals into optical signals to minimize degradation. The system connects to a centralized indoor processing unit, typically housed in a 1U 9″ rack-mounted design that processes incoming optical signals through several receivers, ensuring efficient signal management.

Key features of the system enhance its direction-finding capabilities. It achieves phase matching accuracy of ±10° across multiple RFoF links, crucial for precise localization. The system supports a wide frequency range to accommodate various RF applications. Its robust outdoor enclosures are built for durability in extreme conditions, ensuring reliable operation. Fiber optic connections reduce signal loss and enhance bandwidth, while the centralized 1U 9″ rack-mounted unit enables efficient management of multiple receiver channels, making the system a powerful solution for accurate direction-finding operations.

Monitoring & Control

RFOptic’s multilink products include remote Management and Control (M&C) options for effective monitoring via IP. Supporting protocols like HTML, REST, and SNMP V2c, the M&C interface enables independent management of RFoF modules, providing user-friendly accessibility.

Conclusion

The point-to-point phase matching system for direction finder applications showcases significant benefits in high-frequency signal transmission, particularly in airborne and maritime environments. By utilizing RF over Fiber (RFoF) technology, the system offers reliable transport of multiple RF channels, maintaining high levels of phase coherence across extended distances, which is vital for accurate direction finding. The integration of CWDM multiplexing allows for efficient use of fiber, enabling the simultaneous transmission of several channels while preserving signal integrity. With robust outdoor enclosures designed for harsh environmental conditions, this system meets the demands for reliable communication in critical applications.