Agilent/Keysight 87301D

The Keysight 87301D is a broadband coaxial directional coupler engineered for signal monitoring and signal leveling applications across microwave test systems. This compact device couples signals across a 1 GHz to 40 GHz bandwidth with 13 ± 1 dB nominal coupling, delivering the directivity and low insertion loss required for integration into RF and microwave test benches.

– Technical Specifications

• Frequency Range: 1 GHz to 40 GHz
• Nominal Coupling: 13 ± 1 dB
• Directivity: 14 dB up to 20 GHz; 10 dB from 20 GHz to 40 GHz
• Maximum SWR: 1.5 up to 20 GHz; 1.7 from 20 GHz to 40 GHz
• Insertion Loss: < 1.2 dB up to 20 GHz; < 1.9 dB from 20 GHz to 40 GHz
• Primary Connectors: 2.4 mm female
• Optional Connectors: 2.92 mm female

– Key Features

• Broadband operation spanning 1 GHz to 40 GHz maintains performance across legacy and modern microwave bands
• Low insertion loss minimizes signal degradation in cascaded test setups
• Directivity specification supports precise signal extraction for monitoring and leveling functions
• Compact form factor fits benchtop and integrated measurement systems
• Dual connector options provide flexibility in test system architecture

– Typical Applications

The 87301D serves signal monitoring and leveling roles in microwave test interface units, benchtop analyzers, and communication infrastructure measurement systems. When paired with a coaxial detector, it extracts representative signal samples for power monitoring and system leveling feedback.

– Compatibility & Integration

The coupler integrates with Keysight X-Series signal analyzers and network analyzers. Compatible detector options include the Keysight 8474B, C, and E models for power monitoring applications. Standard 2.4 mm and optional 2.92 mm connectors ensure compatibility with contemporary RF test equipment.