The HP P281B is a waveguide-to-coaxial adapter that transforms WR-62 waveguide transmission lines into 50-ohm coaxial lines across the 12.4 to 18 GHz band. This bidirectional converter enables seamless integration between waveguide-based RF systems and coaxial test equipment, supporting power transmission in both directions with maximum SWR of 1.25:1.
Technical Specifications
• Frequency Range: 12.4 to 18 GHz
• Waveguide Standard: EIA WR-62 (MIL-W-85/1-090)
• Waveguide Flange: UG-419/U (MIL-F-3922/70A-008)
• Coaxial Impedance: 50 Ohms
• Maximum SWR: 1.25:1
• Connector Options: APC-7 (standard), N-type Female (Option 013)
• Physical Length: 64 mm (2.5 inches)
• Shipping Weight: 0.5 kg (1 lb)
– Key Features
• Bidirectional power transmission capability
• Precision APC-7 connector provides low-loss, repeatable performance
• Optional N-type female connector for applications requiring standard RF interfaces
• Compact form factor at 64 mm length
• Specified for MIL-C-71 and MIL-C-39012 connector compliance when N-type option is selected
– Typical Applications
The P281B serves microwave measurement systems, antenna testing, and RF component characterization where waveguide and coaxial test interfaces must be bridged within the Ku-band frequency range.
– Compatibility & Integration
This adapter interfaces directly with WR-62 waveguide systems and standard 50-ohm coaxial instrumentation. The APC-7 connector provides precision connection for laboratory and production environments. The optional N-type connector expands compatibility with field-deployable RF systems and broadband measurement setups.
