Agilent/Keysight 85331B

The Agilent/Keysight 85331B is a single-pole-double-throw (SP2T) absorptive PIN diode solid-state switch engineered for high-frequency RF and microwave signal routing in test and instrumentation systems. Operating across 45 MHz to 50 GHz, it delivers sub-microsecond switching speed with port-to-port isolation exceeding 90 dB. The absorptive design ensures good impedance matching critical for accurate measurements in communications, radar, and complex test environments.

– Technical Specifications

• Configuration: Single Pole Double Throw (SP2T)
• Technology: Absorptive PIN Diode
• Frequency Range: 45 MHz to 50 GHz
• Maximum RF Input Power: +27 dBm (average)
• Port-to-Port Isolation: > 90 dB
• Switching Speed: 90 dB) reduces crosstalk
• Compact form factor: approximately 40.0 mm × 56.2 mm
• Handles +27 dBm average RF power

– Control & Integration

Port selection requires DC bias control via dedicated bias pins. Switching between ports involves applying −7 V to activate and +6.3 V to deactivate. Control cables (1 m to 15 m) and external switch control units are available to simplify bias management and automation in multi-switch test systems.

– Typical Applications

Instrumentation and automated test equipment • RF/microwave communications systems • Radar and sensor applications • Signal routing in complex measurement setups