Agilent/Keysight 11866A

The Agilent/Keysight 11866A is a reflectometer bridge test fixture that performs reflection measurements across microwave frequencies using a resistive Wheatstone Bridge architecture extended to RF/microwave operation. The instrument incorporates two Schottky diode detectors to sample incident and reflected signals, enabling high-directivity measurements with external ratioing for isolation from source mismatch effects.

– Technical Specifications

• Frequency Range: 40 MHz to 18 GHz
• Input SWR: 1.92
• Maximum Input Power: +15 dBm
• Connectors: Type N-Female (input/output); APC-7 optional
• Weight: 0.7 kg net / 2.26 kg shipping
• Measurement Principle: Resistive Wheatstone Bridge with microwave frequency extension
• Directivity: High equivalent directivity achievable over wide bandwidths; measured with 50-ohm termination

– Key Features

• Dual Schottky diode detectors for simultaneous incident and reflected signal sampling
• High directivity performance across 40 MHz to 18 GHz bandwidth
• Effective external leveling via ratioing technique—isolates measurement port from source/bridge input mismatch
• Compact form factor enabling integration into diverse test setups
• Optional 116641 Detector compatibility for simultaneous dual-ratio measurements of insertion and return loss

– Typical Applications

• High-volume production testing of RF/microwave components
• Laboratory reflection coefficient and return loss characterization
• Research and development environments requiring stable, repeatable reflection measurements

– Compatibility & Integration

Designed for dedicated operation with the Agilent 8755 reflectometer. Optional APC-7 connector configuration available for systems requiring this interface.