The Agilent/Keysight P281B is a waveguide-to-coaxial adapter that converts WR-62 waveguide transmission lines into 50-ohm coaxial signals. Operating across 12.4 GHz to 18 GHz, this adapter supports bidirectional power transmission with exceptional impedance matching. The APC-7 coaxial connector interface enables seamless integration into measurement systems and RF test benches requiring high fidelity signal conversion across the full P-Band frequency spectrum.
Technical Specifications
• Frequency Range: 12.4 GHz to 18 GHz
• Waveguide Band: EIA WR-62 (MIL-W-85/1-090, MIL-W-85/1-091)
• Coaxial Connector: APC-7 (Type-N female optional)
• Waveguide Flange: UG-419/U (MIL-F-3922/70A-008, MIL-F-70S-008)
• Characteristic Impedance: 50 ohms
• Maximum Standing Wave Ratio (SWR): 1.25 across operating band
• Power Transmission: Bidirectional – Key Features • Maintains SWR below 1.25 across the entire 12.4–18 GHz band, minimizing signal reflections and insertion loss
• Precision-engineered transition geometry ensures consistent impedance matching at waveguide and coaxial interfaces
• Supports both measurement and transmission applications without connector adaptation
• APC-7 connector standard provides minimal phase distortion in high-precision RF systems
• Optional Type-N female connector available for alternative system integration – Typical Applications • Waveguide-to-coaxial conversion in network analyzer port extensions and calibration systems
• Component characterization and S-parameter measurements in the P-Band frequency range
• Broadband signal routing in automated test equipment (ATE) configurations
• High-accuracy power monitoring and transmission studies requiring low VSWR performance – Compatibility & Integration The P281B directly interfaces WR-62 waveguide transmission lines with standard APC-7 equipped instruments and coaxial test systems. Flange conformance to both commercial (UG-419/U) and military (MIL-F-3922/70A-008, MIL-F-70S-008) specifications ensures compatibility across legacy and modern instrumentation platforms.
