The Agilent/Keysight V281B is a precision waveguide-to-coaxial adapter engineered for V-band measurements from 50 to 67 GHz. It bridges WR-15 waveguide systems to 1.85 mm coaxial connectors, enabling bidirectional signal transmission with minimal loss and reflection. This adapter serves applications where low-loss waveguide performance must interface with coaxial test instrumentation or measurement equipment.
Technical Specifications
• Frequency Range: 50 to 67 GHz
• Waveguide Designator: EIA WR-15
• Waveguide Flange: UG-385/U
• Coaxial Connector: 1.85 mm male
• Maximum SWR: 1.22
• Insertion Loss: ≤ 0.5 dB (typical)
• Return Loss: ≥ 20 dB (typical)
• Repeatability: ≥ -50 dB (typical)
• Operating Temperature Range: 0 to 55°C
– Key Features
• Bidirectional power transmission capability
• Low insertion loss and controlled impedance matching minimize signal degradation
• Typical return loss of 20 dB ensures reflective stability across the V-band
• Repeatability specification of -50 dB supports consistent connector engagement performance
• Compact form factor optimized for millimeter-wave test benches
– Typical Applications
• Integration of waveguide components with coaxial instrumentation
• V-band component characterization via coaxial measurement systems
• Transition between waveguide transmission lines and 50-ohm coaxial systems
• High-frequency network analysis requiring low-loss signal paths
– Compatibility & Integration
The 1.85 mm coaxial connector is compatible with 2.4 mm connectors, extending adapter flexibility. The V281B belongs to the Agilent/Keysight 281 family of millimeter-wave-to-coax adapters, designed to expand measurement versatility for both coaxial and waveguide component testing. Operating and service manuals for the 281A/B series provide detailed performance specifications and maintenance procedures.
