The Agilent/Keysight P281C is a waveguide-to-coaxial adapter that transitions P-band signals from EIA WR-62 waveguide to 50-ohm coaxial transmission lines. It operates bidirectionally across 12.4 GHz to 18 GHz and integrates into RF and microwave test systems requiring both waveguide and coaxial interfaces.
Technical Specifications
• Frequency Range: 12.4 GHz to 18 GHz (P-Band)
• Waveguide Interface: EIA WR-62 with UG-419/U flange (MIL-W-85/1-090, MIL-F-3922/70A-008)
• Coaxial Interface: APC-7mm connector, 50 Ohm impedance
• Maximum Standing Wave Ratio: Less than 1.3 across full waveguide band; 1.06 for specific configurations
• Power Handling: Bidirectional transmission capability limited by coaxial center conductor size; degradation occurs at elevated ambient temperature and altitude
• Internal Design: Step-impedance transformer structure for waveguide-to-coaxial transition
• Calibration Traceability: NIST-traceable measurements per Agilent certification
• Safety Classification: Class I product with protective earthing terminal; uninterruptible safety earth ground required
– Key Features
• Low SWR performance (≤1.3) across entire P-band frequency span ensures minimal signal reflections
• Step-impedance construction provides controlled impedance matching from waveguide to 50-ohm coax
• Bidirectional operation supports both transmit and receive applications
• APC-7mm connector interface enables direct integration with laboratory instrumentation and signal sources
– Typical Applications
• P-band RF and microwave measurement systems
• Waveguide-to-coaxial transitions in test benches
• Network analyzer and power measurement setups requiring waveguide source integration
– Compatibility & Integration
Standard Configuration: APC-7mm (f) coaxial connector
Optional Configurations:
• Option 006: Adds two alignment holes to waveguide flange
• Option 012 (X281C): Type-N (m) connector
• Option 013 (X281C): Type-N (f) connector
• Option 106 (K281C): 3.5 mm (m) connector with flange alignment holes
Designed for systems utilizing P-band waveguide and 50-ohm coaxial RF/microwave test equipment.
