Agilent / Keysight 86205A RF Bridge, 50 Ohm, 300 kHz to 6 GHz

The Agilent/Keysight 86205A is a 50-ohm RF bridge for scalar and vector network analysis across 300 kHz to 6 GHz. It delivers high directivity and stable insertion loss for precision return loss and VSWR measurements on devices ranging from high to low reflection coefficients. The flat coupling factor ensures consistent power leveling across the frequency band, critical for measurements on power-sensitive components.

Technical Specifications

Frequency Range: 300 kHz to 6 GHz Impedance: 50 Ohms (nominal) Directivity:

• 30 dB (300 kHz to 5 MHz)


• 40 dB (5 MHz to 2 GHz)


• 30 dB (2 GHz to 3 GHz)


• 20 dB (3 GHz to 5 GHz, typical)


• 16 dB (5 GHz to 6 GHz, typical) Port Match (SWR):


• 23 dB return loss, 1.15 SWR (300 kHz to 2.0 GHz)


• 20 dB return loss, 1.22 SWR (2.0 GHz to 3 GHz)


• 18 dB return loss, 1.29 SWR (3 GHz to 5 GHz, typical)


• 16 dB return loss, 1.38 SWR (5 GHz to 6 GHz, typical) Insertion Loss:


• Nominally 1.5 dB + 0.1 dB/GHz Coupling Factor:


• Nominal 16 dB


• +0.15 dB/GHz ( 3 GHz)


• ±0.2 dB deviation ( 3 GHz) Operating Temperature Range: 0 °C to 55 °C Connectors: Type-N (female) Physical: 160 mm W × 93 mm H × 23 mm D; 0.57 kg net

Key Features

• Wideband operation from 300 kHz through 6 GHz in single unit


• High directivity in mid-band (40 dB at 5 MHz to 2 GHz) for accurate low-loss measurements


• Stable coupling factor across band with ±0.2 dB deviation below 3 GHz


• Low, flat insertion loss supports power leveling in sensitive measurement setups

Typical Applications

• Return loss and VSWR characterization


• Scalar network analysis


• Reflection measurements on passive and active devices


• Cable and component testing in production environments

Compatibility & Integration Interfaced via Type-N (female) connectors. Compatible with Agilent/Keysight 8753 family vector network analyzers, Keysight ENA series (E5061/71), scalar and vector network analyzers, and spectrum analyzers.