The Keysight 85027D Directional Bridge is a precision RF and microwave test accessory designed for scalar network analyzers. It enables both reflection and transmission measurements across 0.01 to 50 GHz, providing high directivity and excellent test port match characteristics. The device operates at 50 Ω impedance and supports AC (modulated RF) and DC (unmodulated RF) detection modes, making it essential for accurate component characterization in laboratory and production environments.
Technical Specifications
Frequency Range: 0.01 to 50 GHz
Impedance: 50 Ω
Directivity:
• 36 dB from 0.01 to 20 GHz
• 32 dB from 20 to 26.5 GHz
• 30 dB from 26.5 to 40 GHz
VSWR at Test Port:
• <1.18 for 0.01 to 20 GHz
• <1.27 for 20 to 26.5 GHz
• <1.57 for 26.5 to 40 GHz
• Typically <2.00 for 40 to 50 GHz
Connectors: 2.4 mm (female) RF input; 2.4 mm test port
Weight: 5 lb (shipping)
– Key Features
• Scalar reflection and transmission measurement capability
• Dual detection modes: AC and DC modulation support
• High directivity across extended frequency range
• Excellent test port impedance match
• 50 Ω system compatibility
– Typical Applications
Component characterization, reflection coefficient measurement, transmission loss analysis, and system-level RF testing from microwave through millimeter-wave frequencies.
– Compatibility & Integration
Works with Keysight/Agilent/HP scalar network analyzers including 8757 (AC/DC modes), 8756, and 8755 (AC mode). Interfaces with sweep oscillators and synthesized sweepers. Supports detector and power splitter accessories for extended measurement functionality.
