Dual Directional Crossguide Coupler, 9~9.5GHz, 40dB, FBP100, SMA

The dual directional crossguide coupler is a high-precision passive device used in microwave RF systems. Its core function is to simultaneously sample and separate the energy of both forward-traveling (incident wave) and reverse-traveling (reflected wave) signals in the main transmission channel without significantly affecting the primary signal transmission. This device adopts a classic waveguide structure, ensuring low loss and high power capacity, while the coupling ports feature standard SMA interfaces for easy integration and testing..

Key Features:

1. Precise frequency coverage: The operating frequency band strictly covers 9GHz to 9.5GHz, optimized for X-band systems, exhibiting flat response and excellent electrical performance within this range.
2. 40dB high coupling: Provides precise 40dB coupling, meaning only one-ten-thousandth of the energy is sampled from the main channel, minimally impacting the main system signal transmission, making it ideal for high-power, high-precision monitoring applications.
3. Dual directional coupling function: Utilizing a unique "cross" structure, a single device provides two independent coupled outputs: one for sampling the forward-traveling incident wave and the other for sampling the reverse-traveling reflected wave. This significantly enhances system debugging and fault diagnosis efficiency.
4. Waveguide-based design, exceptional performance:
Low insertion loss: The main channel employs a rectangular waveguide, ensuring high transmission efficiency and minimal inherent loss.
High power capacity: Capable of withstanding high average and peak power levels, meeting the demands of high-power applications such as radar systems.
High directivity and isolation: Accurately distinguishes between incident and reflected waves while effectively suppressing signal crosstalk between ports, ensuring the authenticity and accuracy of sampled data.
5. SMA connectors for coupled ports: The coupled output ports are equipped with standard SMA female interfaces, allowing direct connection to coaxial cables and most test instruments (e.g., spectrum analyzers, power meters), enabling plug-and-play operation and greatly simplifying system integration and external circuit design.

Typical Applications:

1. Radar systems: Monitors transmitter output power and antenna port reflected power in real time, serving as a critical "sentry" device to protect expensive transmitters and ensure stable radar system operation.
2. Satellite communication ground stations: Used for uplink power monitoring and downlink signal sampling, ensuring communication link stability and reliability while optimizing transmission quality.
3. Laboratory testing and measurement: Can be used as an external accessory for Vector Network Analyzer (VNA) test systems, enabling S-parameter testing, antenna performance evaluation, and system impedance matching debugging under high-power conditions.
4. Microwave radio and electronic countermeasures (ECM): Employed in electronic warfare systems requiring precise power control and signal analysis for real-time signal monitoring and system calibration.

Qualwave Inc. provide a series of broadband high-power couplers with frequency coverage up to 220GHz. Among them, the broadband high-power dual directional crossguide coupler operates in the frequency range of 2.6GHz to 50.1GHz and is widely used in amplifiers, transmitters, laboratory testing, radar systems, and various other applications. This article introduces a 9~9.5GHz dual directional crossguide coupler.