Waveguide Directional Coupler: The “Signal Sampling Specialist” for Microwave Systems

Waveguide directional couplers are high-power passive microwave components for S-band. They accurately sample low-power coupled signals without attenuating the main transmission signal, to monitor forward and reflected RF signals. This model adopts WR284 waveguide for the main line and N-female coupler port, operating across 2.6–3.95GHz.

1. Core Advantages

>Ultra-low loss & high-efficiency transmission: Main path insertion loss ≤0.1dB, bringing nearly zero extra loss under high-power operation.

>Stable & precise coupling performance: Consistent 50dB bidirectional coupling with directivity ≥20dB. It delivers highly accurate sampling and effectively distinguishes forward and reflected signals to eliminate measurement errors.

>Superior impedance matching: VSWR ≤1.1 for main line and ≤1.3 for coupler port. Excellent matching minimizes signal reflection for reliable operation.

>Robust mechanical design: Constructed from aluminum with conductive oxidation surface treatment. It features corrosion resistance and high-temperature tolerance, complies with RoHS standards, and suits long-term stable industrial operation.

2. Application Scope

Power monitoring and calibration for high-power radar and satellite communication transmitters; signal sampling and link analysis for ground communication base stations and RF test systems; signal feedback and equipment protection for high-power microwave systems such as industrial microwave heaters and medical devices.

3. Customization Service

APEX offers full-range customized waveguide solutions. We support personalized development covering customized frequency bands, coupling degrees, power ratings and connector types to meet unique requirements of various special microwave systems.