Keysight (Agilent) N1811TL

The Keysight (Agilent) N1811TL is a terminated 4-port bypass coaxial switch engineered for RF and microwave signal routing in automated test systems, telecommunications, and research laboratories. This latching electromechanical switch delivers precise, repeatable signal path control from DC to 67 GHz across standard configurations, with permanent magnet latching that eliminates continuous power draw. The device features a rectangular coaxial structure with controlled wiping action RF contacts and built-in current interrupt capability, designed to withstand 5 million minimum operating cycles—extending to 10 million typical—while maintaining insertion loss repeatability of 0.03 dB to 1 million cycles.

– Technical Specifications

RF Performance
• Frequency range: DC to 67 GHz (standard); DC to 40 GHz (Option 040); DC to 50 GHz (Option 050)
• Impedance: 50 ohm
• Insertion loss: 0.27 dB at 4 GHz, 0.80 dB at 26.5 GHz, 1.12 dB at 67 GHz
• SWR: < 1.10 at 4 GHz, < 1.60 at 26.5 GHz, 120 dB at 4 GHz, 70 dB at 26.5 GHz and 67 GHz

Mechanical & Operating
• Switching mechanism: Latching electromechanical
• Internal load: Terminated (up to 1 watt in bypass mode)
• Operating life: 5 million cycles (guaranteed minimum); 10 million cycles (typical)
• Insertion loss repeatability: 0.03 dB to 1 million cycles at 40 GHz, 0.05 dB at 50 GHz, 0.08 dB at 67 GHz
• Contact action: Controlled wiping action with permanent magnet latching

– Key Features

• Permanent magnet latching eliminates standby power consumption
• Built-in current interrupt for safe relay operation
• Repeatable performance across extended switching cycles
• Low insertion loss across full frequency range
• High isolation at microwave frequencies

– Typical Applications

• Automated RF/microwave test systems
• Telecommunications signal routing
• Laboratory research and characterization
• Multi-port signal path switching

– Compatibility & Integration

The N1811TL integrates into complex test setups requiring deterministic switching performance and long operational life. Multiple frequency options support deployment across DC to 67 GHz applications with consistent electrical performance.