Agilent/Keysight 11590B

The Agilent/Keysight 11590B is a broadband high-power bias network that supplies DC bias to the center conductor of a coaxial connector while isolating RF signals from DC components. Internal filtering architecture—featuring a capacitive DC block and high-pass filter on the RF input arm, combined with series inductance and shunt capacitance on the bias/sensing ports—enables precise signal separation across wide frequency ranges. The device maintains 50 ohm impedance and supports maximum bias delivery of 100 V and 500 mA, with optional dual bias-port configuration for increased current capacity. Type N connectors (or 7mm with Option 001) provide standard integration into RF and microwave test systems.

– Technical Specifications

• Frequency Range: 100 MHz to 12.4 GHz (standard); optional extension to 18 GHz with Option 001
• Insertion Loss: 0.8 dB (to 12.4 GHz); 1.2 dB (to 18 GHz, Option 001)
• Maximum SWR: 1.25 (to 12.4 GHz); 1.5 (to 18 GHz, Option 001)
• Impedance: 50 ohms
• RF Power Handling: +24 dBm maximum
• Bias Voltage: 100 V maximum
• Bias Current: 500 mA maximum
• Connectors: Type N (female) RF in/out and BNC (female) DC bias (standard); 7mm RF in/out with Option 001
• Operating Temperature: 0 to 55 °C

– Key Features

• Dual bias/bias-sensing port configuration for enhanced current handling
• Low-pass filtered bias network isolates RF from DC
• High-impedance voltmeter connection for accurate bias-point measurement
• Minimal insertion loss and controlled SWR across operating band

– Typical Applications

• Vector and scalar network analyzer setups
• Reflection measurements in laboratory and production environments
• High-power device characterization requiring simultaneous RF and DC biasing