Agilent/Keysight 86205B

The Agilent/Keysight 86205B is a 50 Ohm RF directional bridge engineered for precision reflection measurements and signal leveling across RF and microwave systems. Operating from 300 kHz to 3 GHz, this instrument delivers directivity ranging from 38 dB (0.3 MHz to 1.3 GHz) to 33 dB (1.3 GHz to 3 GHz), making it well-suited for network analyzer integration and laboratory measurement applications.

– Technical Specifications

Frequency & Impedance
• Frequency range: 300 kHz to 3 GHz
• Nominal impedance: 50 Ohms
• Port match: 14 dB (0.3 MHz to 3 GHz) / 1.50 SWR

Directivity & Return Loss
• Directivity: 38 dB (0.3 MHz to 1.3 GHz); 33 dB (1.3 GHz to 3 GHz)
• Return loss: 14 dB (0.3 MHz to 3 GHz)

Insertion Loss & Coupling
• Insertion loss: 2.0 dB (0.3 MHz to 1 GHz); 2.5 dB (1 GHz to 3 GHz); nominal 1.5 dB with ±0.2 dB deviation
• Coupling factor: 18 dB ±3 dB (0.3 MHz to 3 GHz); nominal 16 dB with ±0.2 dB deviation below 3 GHz

Power & DC Specifications
• Maximum input power: 25 dBm
• Maximum DC voltage through arm: 30 VDC
• Maximum DC current through arm: 1 Amp

Connectors & Physical
• Connectors: 3.5 mm (f), APC-7
• Dimensions: 133.2 W × 18.2 H × 31.5 mm D
• Weight: 0.31 kg

Operating Environment
• Operating temperature: 0 °C to 55 °C

– Key Features

• Wide frequency coverage from 300 kHz through 3 GHz
• High directivity specification ensures accurate forward/reflected signal separation
• Low insertion loss minimizes signal degradation in measurement chains
• Compact form factor with standard 3.5 mm APC-7 connectors
• Handles up to 25 dBm input power with 30 VDC / 1 A DC bias capability

– Typical Applications

• Reflection coefficient and VSWR measurements
• Signal leveling and power monitoring
• Network analyzer accessory for impedance characterization
• RF and microwave system validation in R&D and manufacturing environments

– Compatibility & Integration

The 86205B integrates directly with Keysight/Agilent network analyzers via standard 3.5 mm connectors. Its low insertion loss and predictable coupling characteristics support multi-port measurement configurations without significant measurement degradation.