GQE-LPF : Customizable Cryogenic Low Pass Filter
Specifications:
- Gateway Quantum Electronics
Cryogenic low pass filter for DC wire sets, standard configuration
Combination of multi-pole RC and LC filtering for rejection of
unwanted frequencies up to >20 GHz.
Standard configuration (GQE-LPF-S):Lines 1-4:  20 Hz cutoff, 103 Ω
Lines 5-20:  20 kHz cutoff, 1002 Ω
Lines 21-25:  50 kHz cutoff, 8 Ω
Product specifications:
— 2-pole RC and four stages of 7-pole LC filtering
— Insertion loss: > 60 dB for 1 MHz – 1 GHz (typ.)
— Insertion loss: > 50 dB for 1 – 20 GHz (typ.)
— Isolation from ground: > 10 GΩ (typ.)
— Input connector: 25-socket (female) D-sub micro
— Output connector: 25-pin (male) D-sub micro
20 Hz RC filter:
— Resistance: 103 Ω
— Insertion loss at 60 Hz: > 13 dB (typ.)
— Operating limits: 10 V or 50 mA (max.)
— Recommended applications: Aggressive filtering of DC bias lines to qubits, JPAs, TWPAs, and other sensitive quantum devices.
20 kHz RC filter:
— Resistance: 1002 Ω
— Phase shift at 100 Hz: < 0.5 deg. (typ.)
— Operating limits: 25 V or 15 mA (max.)
— Recommended applications: Low-frequency lock-in amplifier measurements
50 kHz RC filter:
— Resistance: 8 Ω
— Operating limits: 25 V or 250 mA (max.)
— Recommended applications: Filtering connections to electromechanical switches and other high-current devices.
Industry standard 25-pin micro-D connectors.
