Agilent/Keysight 33326L

The Agilent/Keysight 33326L is a coaxial electromechanical SPDT (Single Pole Double Throw) switch engineered for high-frequency signal routing from DC to 26.5 GHz. This device delivers low insertion loss, high isolation, and exceptional repeatability across millions of cycles—essential for automated test systems, signal routing applications, and telecommunications infrastructure requiring precision switching and signal integrity.

– Technical Specifications

Electrical Performance
• Frequency range: DC to 26.5 GHz
• Attenuation range: Up to 90 dB
• Insertion loss: Typically less than 0.25 dB + 0.027 dB/GHz
• Isolation: Typically 110 dB − 2.25 dB/GHz
• Impedance: 50 Ohms
• Repeatability: Less than 0.03 dB for 5 million cycles per section; less than 0.05 dB from 18 to 26.5 GHz for up to 5 million cycles per section

Power Handling
• Average power: 0.5 W
• Peak power: 350 W (10 µs max pulse duration)

Mechanical
• Connectors: 3.5 mm female
• Durability: Over 10,000,000 cycles

Control
• Drive voltage: 4.5 V to 32 V DC (options available)
• Control interface: 10-pin DIP socket

– Key Features

• Broadband operation to 26.5 GHz enables high-frequency measurement and switching applications
• Verified repeatability below 0.05 dB across the full frequency range maintains measurement accuracy over extended equipment lifespans
• Low insertion loss combined with high isolation minimizes signal degradation and cross-talk in complex test architectures
• 3.5 mm connectors provide superior ruggedness and performance retention compared to SMA alternatives at millimeter-wave frequencies
• Electromechanical design delivers mechanical reliability and thermal stability without active components

– Typical Applications

• Automated test equipment (ATE) and signal routing matrices
• Telecommunications and RF measurement systems
• High-frequency component characterization
• Precision attenuation and switching in broadband test benches

– Compatibility & Integration

The 33326L integrates into systems via DC drive voltage (4.5 V to 32 V) and 10-pin DIP socket control. The 50 Ohm, 3.5 mm connector interface ensures compatibility with standard laboratory and production test configurations operating across DC and microwave frequencies.