Agilent/Keysight 11904S

The Agilent/Keysight 11904S is a metrology-grade adapter set that bridges 2.4 mm test ports on network analyzers to 2.92 mm (K) connector devices. This four-piece adapter ensemble protects sensitive analyzer ports while enabling calibrated measurements across DC to 40 GHz for 2.92 mm devices, or up to 50 GHz when measuring 2.4 mm devices with appropriate calibration definitions.

Technical Specifications

• Frequency Range: DC to 40 GHz (2.92 mm devices); DC to 50 GHz (2.4 mm devices)


• Return Loss: ≥ 24 dB across specified frequency range


• Connector Types: Precision 2.4 mm and 2.92 mm (K) interfaces


• Construction: Rugged design engineered to tight tolerances for broadband performance and stable, repeatable connections

Key Features

• Four-adapter configuration: 2.4 mm male-to-2.92 mm male, 2.4 mm male-to-2.92 mm female, 2.4 mm female-to-2.92 mm female, and 2.4 mm female-to-2.92 mm male


• Port protection for 2.4 mm test set ports during 2.92 mm device mating


• Includes modified standards data files for network analyzer calibration workflows


• Optional torque wrench (0.57 Nm / 5 lb-in) for consistent connection torque control


• Supplied in protective wooden case for storage and transport

Typical Applications Designed for RF and microwave test environments requiring measurements on 2.92 mm connector devices up to 40 GHz. Enables extension of 2.4 mm calibrated network analyzer systems to K-connector test articles without port degradation.

Compatibility & Integration Primary compatibility includes Agilent 8510 and 8722 series network analyzers, plus Keysight PNA Series instruments. The 2.92 mm interface accommodates SMA and 3.5 mm connector compatibility through precision adapter use.