SMA Cryogenic Infrared Filter, 30 dB @ 4 GHz, 10 mK | VST-PF-SMA3002-18G
P/N: VST-PF-SMA3002-18G
• High-frequency photon and noise suppression for cryogenic RF signal paths
• Operation down to 10 mK for dilution-refrigerator and millikelvin systems
• 30 dB insertion loss at 4 GHz with 50 Ω impedance
• Inline SMA male-to-female architecture for direct integration and signal-line thermalization
VST-PF-SMA3002-18G is a 50 Ω SMA male-to-female cryogenic infrared filter for millikelvin RF and microwave signal chains. The device is specified from DC–18 GHz, provides 30 dB insertion loss at 4 GHz, and supports operation down to 10 mK.
Cryogenic infrared filtering is used to attenuate unwanted high-frequency radiation and noise-photon flux propagating from warmer temperature stages toward sensitive low-temperature devices. The inline coaxial format enables direct integration into dilution-refrigerator and other cryogenic RF paths while supporting signal-line thermalization as part of the overall system architecture.
High-Frequency Photon & Noise Suppression
Designed to reduce unwanted high-frequency radiation and noise-photon propagation toward sensitive cryogenic devices.
Millikelvin Operation Down to 10 mK
Suitable for dilution refrigerators and other millikelvin RF and microwave measurement environments.
30 dB Insertion Loss at 4 GHz
Provides a defined attenuation point at 4 GHz without implying a fixed 30 dB attenuation across the full specified range.
Inline SMA Integration & Thermalization
SMA male-to-female architecture supports direct coaxial integration and signal-line thermalization at an appropriate cryogenic stage.
In superconducting quantum and other millikelvin systems, stray infrared and high-frequency photons can contribute to unwanted device heating and quasiparticle excitation. Cryogenic IR filters are therefore used as part of the RF chain to reduce this high-frequency photon loading before it reaches temperature-sensitive devices.
System-level role: filter placement should be considered together with attenuation, shielding, thermalization, and the required signal band. The published 30 dB @ 4 GHz value is the specified insertion-loss point for this model.
| Part Number | VST-PF-SMA3002-18G |
|---|---|
| Product Type | Cryogenic Infrared Filter |
| Specified Frequency Range | DC–18 GHz |
| Insertion Loss @ 4 GHz | 30 dB |
| VSWR (Max) | 1.85 : 1 |
| Impedance | 50 Ω |
| RF Interface | SMA Male to SMA Female |
| Minimum Operating Temperature | 10 mK |
| Overall Length | 46.7 ± 1 mm |
|---|---|
| Across Flats / Wrench Hex | 8 mm HEX |
| Male Interface Thread | 1/4-36UNS-2A |
| Female Interface Thread | 1/4-36UNS-2B |
| Body | Brass, gold-plated |
| Center Conductor | Brass, gold-plated |
| Outer Conductor | Brass, gold-plated |
| Dielectric / Insulator | PTFE |
| Compliance | RoHS |
Superconducting Quantum Computing
Cryogenic RF filtering in microwave signal paths for superconducting qubits and quantum processors.
Dilution Refrigerator RF Systems
High-frequency energy suppression and signal-line thermalization within millikelvin coaxial wiring.
Cryogenic Device Characterization
Low-temperature RF and microwave measurement of superconducting and quantum devices.
Use the filter as part of the overall cryogenic attenuation, thermalization, shielding, and signal-conditioning architecture. Select placement according to the required signal band, noise budget, and cryogenic stage configuration.
Need help integrating this filter into your cryogenic RF chain?
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