The Agilent/Keysight Q281B is a waveguide-to-coaxial adapter that transitions signals between WR-22 waveguide and 2.4 mm coaxial transmission lines across the Q-band frequency spectrum. This bidirectional component maintains signal integrity and measurement accuracy in demanding RF and microwave test setups by minimizing reflections and power loss through low standing wave ratio performance.
Technical Specifications
• Waveguide Interface: EIA WR-22 with UG-383/U flange
• Coaxial Connector: 2.4 mm male
• Frequency Range: 33 GHz to 50 GHz (Q-Band)
• Characteristic Impedance: 50 Ohm
• Maximum SWR: Less than 1.3
• Typical SWR: 1.17
• Signal Direction: Bidirectional
– Key Features
• Low SWR performance across the operational frequency range minimizes signal reflections and associated power loss
• Precision impedance matching maintains signal integrity in critical power measurement and test applications
• 2.4 mm coaxial connector system provides superior performance for millimeter-wave frequencies relative to lower-frequency connector types
• Electrical design prevents equipment damage from signal reflections in sensitive measurement circuits
– Typical Applications
• Q-band microwave signal measurement and analysis
• Power transmission and monitoring in millimeter-wave test systems
• Coaxial-to-waveguide signal conversion in integrated RF measurement setups
• Equipment requiring precise handling of microwave signals with minimal insertion loss
– Compatibility & Integration
The Q281B interfaces directly with systems utilizing WR-22 waveguide architecture and equipment equipped with 2.4 mm female coaxial connectors. Legacy compatibility extends to Agilent and HP test equipment lineages, as well as current Keysight instruments, reflecting the manufacturer’s continuous presence across test and measurement platforms.
