The Keysight N1810UL is an unterminated single-pole double-throw (SPDT) latching electromechanical coaxial switch engineered for high-frequency signal routing from DC to 67 GHz. This break-before-make switch uses permanent magnets to latch contacts and includes automatic current interrupt after switching, protecting downstream circuits while minimizing power consumption. Female SMA connectors are standard, with 2.92 mm, 2.4 mm, and 1.85 mm options available.
Technical Specifications
Switch Architecture
• SPDT, latching electromechanical design
• Break-before-make switching action
• Latching time: typically within 15 milliseconds
• Permanent magnet latching mechanism
• Current interrupt function
Frequency Coverage
• Operating range: DC to 67 GHz (multiple configurations available: DC to 4 GHz, DC to 20 GHz, DC to 26.5 GHz, DC to 40 GHz, DC to 50 GHz)
Connectors
• Female SMA (standard)
• Optional: 2.92 mm, 2.4 mm, 1.85 mm
Electrical Supply
• Option 105 (5 V): 4.5 V to 7.0 V supply, 300 mA to 600 mA
• Option 1151 (15 V): 12.0 V to 20.0 V supply, 125 mA to 250 mA
• Option 1242 (24 V): 20.0 V to 32.0 V supply, 75 mA to 150 mA
• Drive options: standard or TTL/5 V CMOS compatible
• Optional position indicators available
– Key Features
RF Performance
• Insertion loss at 4 GHz: < 0.27 dB
• Insertion loss at 26.5 GHz: < 0.80 dB
• Insertion loss at 67 GHz: < 1.12 dB
• VSWR at 4 GHz: < 1.10
• VSWR at 26.5 GHz: < 1.60–1.80
• Exceptional repeatability: 0.03 dB typical over 1 million cycles; 0.1 dB over 2 million cycles
– Typical Applications
• Microwave and millimeter-wave test signal routing
• Multi-port network analyzer expansion
• Automated test equipment (ATE) for RF/microwave modules
• High-frequency component characterization
– Compatibility & Integration
The N1810UL integrates into systems requiring low-loss, high-reliability switching. Multiple coil voltage options and drive configurations enable flexible integration into 5 V, 15 V, and 24 V control environments. Long operational life and insertion loss repeatability ensure consistent performance across extended test campaigns.
