Keysight 84904K/004/024 Programmable Step Attenuator

Overview

The Keysight 84904K is a programmable step attenuator designed for precision RF and microwave measurements from DC to 26.5 GHz. Utilizing miniature thin-film attenuation cards on sapphire substrate, it delivers exceptional attenuation accuracy and low SWR in a compact form factor 35% smaller than previous-generation designs, with less than 2 dB insertion loss at 26.5 GHz.

Key Features

• Frequency range: DC to 26.5 GHz (or DC to 40 GHz with optional calibration)
• Attenuation range: 0 to 11 dB in 1 dB steps (optional 70 dB or 90 dB configurations available)
• High repeatability: 0.03 dB maximum with lifespan exceeding 5 million switching cycles per section
• Exceptionally low insertion loss: 0.8 dB + 0.04 dB/GHz at 0 dB setting
• Maximum SWR: 1.3 to 12.4 GHz, 1.7 to 26.5 GHz
• High-stability tantalum nitride thin-film construction on sapphire substrate
• 3.5 mm female connector (optional 3.5 mm male/female configurations)
• Power handling: 1 W average, 50 W peak RF input
• 10-pin socket programming interface

Applications

• Automated test and measurement systems (ATS)
• Signal monitoring and routing for precision RF/microwave applications
• Component characterization and network analysis
• High-frequency circuit validation