Dual Directional Coupler, 0.36~200MHz, 3000W

Dual directional couplers are important passive components used in RF and microwave systems for signal sampling and power monitoring. Unlike single directional couplers, they can simultaneously extract a small portion of the signal in both the forward and reverse directions of the main transmission line, allowing the system to monitor forward power and reflected power separately. They are therefore particularly critical in applications such as transmitter protection, antenna VSWR monitoring, and laboratory power measurement. For high-power applications, a coupler must not only have sufficient power handling capability but also maintain low loss, good coupling flatness, and stable environmental adaptability to ensure long-term reliable operation. The QDDC-0.36-200-3K-50-LCN is a dual directional coupler designed specifically for these requirements: it offers strong high-power handling capability and is equipped with fan-powered cooling, very low mainline insertion loss, good coupling flatness of the coupled output across the band, and excellent directivity and VSWR performance; it also uses LC female RF connectors and N female coupling connectors, operates over a wide temperature range, and is suitable for system integration and long-term stable operation. The following introduces the product from two aspects: product features and applications.

Features:

Low insertion loss: The mainline insertion loss is very low, with minimal impact on the main transmission signal, helping to maintain overall system efficiency.
High power handling capability: It offers strong high-power handling capability and is equipped with fan-powered cooling, meeting the needs of high-power transmission systems and high-power test benches.
Stable coupling output: Coupling and coupling flatness performance are good, and the coupled output is relatively stable across the wide band, facilitating subsequent measurement and calibration.
Good directivity and matching performance: Directivity is good, and the VSWR of both the mainline and coupling port is low, ensuring both forward/reverse signal separation and good matching performance.
Wide operating temperature range and convenient system integration: It operates over a wide temperature range and uses LC female RF connectors and N female coupling connectors, facilitating system integration.

Main Application Areas:

Laboratory testing: Used in RF laboratories for power measurement, VSWR testing, and signal sampling; its high-power capability enables it to cover a variety of devices under test.
Telecommunication systems: Used for forward and reverse power monitoring in base stations, transmitters, and other telecommunication equipment, helping to achieve power control and fault protection.
Wireless systems: Used to monitor antenna matching status and reflected power in wireless transmission links, helping to maintain system stability.
Instrumentation: Used as an internal or external power sampling unit in test instruments, providing stable coupled output for calibration and metrology.
High-power transmission and industrial applications: With its high power capacity and fan-cooled design, it is suitable for high-power monitoring scenarios such as transmitting stations and industrial RF heating.