Agilent/Keysight R365A

The Agilent/Keysight R365A is a waveguide isolator engineered for precision microwave measurements across the 26.5 to 40 GHz band. Built on Faraday rotation principles, it minimizes source reflections to enhance measurement accuracy while maintaining low insertion loss—critical performance for demanding RF and microwave test setups.

– Technical Specifications

• Frequency Range: 26.5 to 40 GHz
• Waveguide Standard: WR-28
• Design Architecture: Faraday rotation with ferrite material, impedance-matching elements, and permanent magnet bias
• Isolation: Better than 25 dB across band
• Standing Wave Ratio (SWR): Low
• Insertion Loss: Low

– Key Features

• Broadband isolation exceeding 25 dB minimizes reverse coupling and source mismatch errors
• Low SWR performance maintains impedance consistency throughout the operating band
• Permanent magnet biasing eliminates external power dependencies
• Ferrite-based design delivers stable, repeatable isolation over temperature and frequency
• Minimized insertion loss preserves signal integrity in cascaded measurement chains

– Typical Applications

• Network analyzer source isolation and mismatch correction
• Microwave test fixture calibration and verification
• High-frequency measurement chains requiring source decoupling
• RF and microwave instrument characterization

– Compatibility & Integration

The R365A integrates directly into WR-28 waveguide systems and test benches operating in the Ka-band region. Its low-loss, high-isolation design makes it suitable for applications where source reflection suppression is essential for measurement traceability and accuracy.

Status: Obsolete product.