20 dB SMP Cryogenic Fixed Attenuator DC–18 GHz 2 W VST-QU-SMP200202-18G

P/N: VST-QU-SMP200202-18G

  • For compact cryogenic signal attenuation
  • 20 dB isolation for sensitive quantum circuits
  • SMP interface for high-density integration
  • Well suited to dilution refrigerator setups
  • Supports precision microwave paths through 18 GHz
Engineering Note
The VST-QU-SMP200202-18G is a 20 dB SMP cryogenic fixed attenuator for compact low-temperature RF paths that require stronger signal reduction while maintaining a controlled 50 Ω impedance path. It supports DC–18 GHz operation with a 2 W power rating, ±1.2 dB attenuation tolerance, and VSWR 1.45:1 max. Its compact SMP interface is suited to cryogenic RF systems, quantum computing assemblies, dilution refrigerator signal chains, and other space-constrained microwave setups where higher attenuation is needed.

Technical Specifications

Part Number VST-QU-SMP200202-18G
Product Type SMP Cryogenic Fixed Attenuator
Nominal Attenuation 20 dB
Attenuation Tolerance ±1.2 dB
Frequency Range DC–18 GHz
VSWR (Max) 1.45 : 1
Impedance 50 Ω
Power Rating 2 W
Connector Interface SMP-JK
Body Material Brass, gold-plated
Male Inner Contact Beryllium copper, gold-plated
Female Inner Contact Beryllium copper, gold-plated
Size Ø7.1 × 22.9 mm
Structure Inline SMP cryogenic fixed attenuator
Body Format 15/20/30 dB body format
Length 22.9 ± 1.0 mm
Diameter Ø7.1 mm
Compliance RoHS
Configuration Non-magnetic option available

Target Applications

Compact Cryogenic RF Systems
Suitable for low-temperature RF paths that require higher attenuation in compact SMP-based assemblies.

Quantum Computing Assemblies
Used in dilution refrigerator and quantum signal chains where controlled inline attenuation is needed in limited space.

High-Density RF Packaging
A practical choice for compact cryogenic microwave packaging and RF path matching where SMP interface density is important.

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