The Agilent/Keysight 775D is a dual-directional coupler engineered for swept-frequency measurements in the 0.45 to 0.94 GHz band. It delivers high directivity and excellent mean coupling accuracy at an economical price point, making it the preferred choice for reflectometer applications and signal monitoring across RF communication systems.
Technical Specifications
• Frequency Range: 0.45 to 0.94 GHz
• Type: Dual-directional coupler
• Nominal Coupling: 20 dB
• Nominal Coupling Variation: ±1.0 dB
• Directivity: >40 dB
• Maximum SWR: 1.15
• Insertion Loss: <0.40 dB
• System Impedance: 50 ohms (7-mm)
– Key Features
• Dual-directional architecture for simultaneous forward and reflected signal monitoring
• Directivity exceeding 40 dB ensures clean separation between incident and reflected waves
• Tight coupling variation of ±1.0 dB maintains accuracy across the operating band
• Auxiliary arms with close tracking—critical for reflectometers driven by sweep oscillators
• Low insertion loss of <0.40 dB minimizes circuit impact
• High SWR performance (1.15 max) preserves system impedance integrity
– Typical Applications
• Reflectometer systems and power measurement networks
• Swept-frequency measurements in communication test labs
• Signal monitoring and power detection in RF systems
• System testing and component calibration for RF and microwave applications
– Compatibility & Integration
Designed for 50-ohm 7-mm connector systems, the 775D integrates directly into standard RF test benches and automated measurement setups requiring dual-path directional coupling.
