passiveTier A
Low-pass Filter
Suppress out-of-band noise and high-frequency leakage on filtered cryogenic lines, especially flux and auxiliary low-frequency paths.
What it does
Compact inline coaxial low-pass filter block used for cryogenic wiring on flux and filtered auxiliary lines. This reference shape represents a machined SMA low-pass filter body, not a generic IR plate filter or a copper-powder absorptive can.
Where it goes
- Allowed stages
- 4K, Still, CP, MXC, 1K
- Preferred stages
- 4K, Still, CP, MXC
- Typical line types
- flux, dc
- Strongly recommended on flux and selected auxiliary lines.
- Do not use this LPF block as a substitute for staged attenuators on XY or readout input lines.
- IR plate filters and absorptive copper-powder filters should be modeled as separate component families.
Typical specifications
| Type | Coaxial low-pass block |
| Cutoff | 1 – 12 GHz |
| Insertion loss | < 1 dB |
| Connectors | SMA female / SMA female |
Ports
- Ininflux, dc, microwave50 Ω
- Outoutflux, dc, microwave50 Ω
Physical envelope
29.0 × 11.0 × 20.0 mm
Compact coaxial low-pass filter envelope aligned to the ~29 × 20 × 11 mm machined SMA block class. Ports are placed at the mating planes rather than at decorative connector centers.