The Agilent/Keysight W281C is a precision coaxial-to-waveguide adapter engineered for W-band signal analysis and measurement in the 75 GHz to 110 GHz frequency range. This component bridges 1.0 mm coaxial connectors to EIA WR-10 waveguide, enabling low-loss transitions across millimeter-wave test systems with minimal mismatch uncertainty.
Technical Specifications
• Frequency Range: 75 GHz to 110 GHz
• Coaxial Connector: 1.0 mm female
• Waveguide: EIA WR-10 MIL-W-85/3-024
• Flange: UG-387/U MIL-F-3922/67B-010
• Maximum SWR: 1.16
• Length (connector mating surface to waveguide aperture centerline): 13.79 mm (0.543 in)
– Key Features
• Low SWR transitions reduce mismatch uncertainty in high-frequency measurements
• Excellent repeatability across multiple cycles
• Stable, low-loss performance throughout W-band
• Precision 1.0 mm coaxial connector geometry
– Typical Applications
Millimeter-wave component characterization, antenna measurements, and signal analysis in the W-band spectrum. The adapter’s low SWR makes it suitable for precision scalar and vector network analysis where transition losses directly impact measurement accuracy.
– Compatibility & Integration
Designed for integration with Keysight 8510XF test systems and W-band measurement platforms. The UG-387/U flange ensures standard waveguide interconnection with complementary test equipment and components.


















