The Keysight 87300B is a coaxial directional coupler engineered for signal monitoring and power measurement across microwave frequencies. Operating from 1 GHz to 20 GHz, it extracts a sampled signal proportional to incident power while maintaining minimal disruption to the main transmission path. The coupler delivers 10 dB nominal coupling with ±0.5 dB variation and achieves directivity exceeding 16 dB, making it suitable for precision test applications in laboratories and system integration environments.
Technical Specifications
Frequency Range: 1 GHz to 20 GHz
Coupling & Directivity
• Nominal coupling: 10 dB
• Coupling variation: ±0.5 dB
• Frequency sensitivity: ±0.35 dB
• Directivity: ≥16 dB
Power & Insertion Loss
• Insertion loss: <1.5 dB (typical: 0.6 + 0.04f dB, where f is frequency in GHz)
• Average power rating: 20 W
• Peak power rating: 3 kW
• Maximum VSWR: 1.35:1
Connectors: SMA Female (input, output, and coupled ports)
Physical: 74 g, module format with connectors
– Key Features
• Low insertion loss across the full frequency range minimizes signal path impact
• Flat coupling response with tight tolerance ensures predictable measurement accuracy
• High directivity isolates forward and reverse signals
• Compact SMA-based design integrates into standard test setups
• Rated for both average and peak power levels common in RF/microwave applications
– Typical Applications
• Real-time signal monitoring during transmission
• Signal leveling when paired with coaxial detectors
• Power measurement using coaxial power sensors on the sampling port
• Frequency monitoring with microwave counters
• Spectrum analysis via signal analyzers connected to the coupled port
– Compatibility & Integration
Works with Agilent 8474B, C, E coaxial detectors for signal leveling and 848X series power sensors for power monitoring. Member of the 87300 Series coupler family.
