Keysight (Agilent) 8474E Planar-Doped Barrier Diode Detector,

The Keysight (Agilent) 8474E is a planar-doped barrier (PDB) diode detector engineered for precision signal detection across microwave and millimeter-wave frequencies. Built on a gallium arsenide detecting element, it delivers superior performance compared to point-contact and Schottky diodes, with exceptional broadband flatness and stability. The detector is housed in a coaxial configuration and rated for high ESD resistance, making it suitable for demanding test and measurement environments.

– Technical Specifications

• Frequency Range: 10 MHz to 50 GHz
• Detector Element: Gallium Arsenide Planar-Doped Barrier (PDB) diode
• Frequency Response:
– ± 0.4 dB to 26.5 GHz
– ± 0.6 dB to 40 GHz
– ± 1.0 dB to 50 GHz
– Unit-to-unit tracking: ± 0.3 dB typical
• Standing Wave Ratio (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 Operating Input Power: 200 mW
• Maximum Short-Term Input Power (< 1 minute): 1 W
• Output Polarity: Negative (default); positive polarity available (Option 103)
• Input Connector: 2.4 mm male
• Output Connector: SMC male

– Key Features

• Square-law response variation of 3% from 2 to 18 GHz—substantially lower than 9.5% for Schottky detectors
• Optimal square-law load option available (Option 102)
• High ESD resistance for field reliability
• Coaxial construction

– Typical Applications

Radar and satellite testing, wireless communications, microwave backhaul, and general microwave instrumentation where broadband performance and measurement repeatability are critical.