Agilent/Keysight 8474E

The Agilent/Keysight 8474E is a RF detector engineered for precise power measurement across microwave and RF systems from 0.01 to 50 GHz. Built on a gallium arsenide planar-doped barrier detecting element, it delivers exceptionally flat frequency response, superior square-law linearity, and stable performance across temperature variations. The detector exhibits high ESD resistance and minimal unit-to-unit frequency response variation, making it suitable for both laboratory and field deployment.

Technical Specifications

• Frequency Range: 0.01 to 50 GHz


• Detecting Element: Gallium arsenide, planar-doped barrier (PDB)


• Frequency Response Flatness: - ± 0.4 dB to 26.5 GHz - ± 0.6 dB to 40 GHz - ± 1.0 dB to 50 GHz


• Maximum SWR: 1.2 (to 26.5 GHz), 1.6 (to 40 GHz), 2.8 (to 50 GHz)


• Low Level Sensitivity: > 0.4 mV/µW to 40 GHz; > 0.34 mV/µW to 50 GHz


• Maximum Continuous Input Power: 200 mW


• Maximum Short-Term Input Power (< 1 minute): 1 W


• Unit-to-Unit Tracking: Typically ± 0.3 dB or better


• Output Polarity: Negative (default); Option 103 provides positive output


• Input Connector: 2.4 mm male


• Output Connector: SMC male


• Weight: 9.1 grams

Key Features

• PDB diodes exhibit maximum 3% square-law response variation from 2 to 18 GHz, compared to 9.5% for Schottky detectors


• Superior square-law linearity versus point-contact or Schottky designs


• Option 102 adds external square-law load with ± 0.5 dB ideal square-law deviation


• Temperature-stable frequency response


• High electrostatic discharge resistance

Typical Applications

• Signal monitoring and power control


• Automated RF and microwave test systems


• Radar and satellite testing


• Wireless communications measurements


• Microwave backhaul characterization