Microwave Filter | Thermalizer
Designed for mili-Kelvin and sub-mili-Kelvin experiments
Microwave filtering and thermalization of signal wires are two critical ingredients in setting up a sensitive low-temperature experiment. Our compact cryogenic microwave filter and thermalizer (MFT) unites efficient electron thermalization with ultra-strong microwave attenuation.
MFTs consist of a copper or other low-resistivity wire embedded in a highly conductive silver matrix. The silver matrix acts as a heat exchanger ensuring optimal thermalization.
The superior performance of single MFT filters was proven in an experiment that cooled a Coulomb blockade thermometer down to 7.5 mK with a dilution fridge temperature at 5 mK (ref: Scheller et al. APL 2014).
Strong attenuation and thermalization
Low capacitance and low resistance
Strong attenuation of >100 dB above 130 MHz
~100 Ω & 2.5 nF @ 4K
~25 mΩ & 2.5 nF @ 4K
Low capacitance for low noise
Low resistance for high current applications
> 1 TΩ resistance to ground
> 100 V maximum applied voltage
Single MFT filters
SMA, MCX connectors or customized
Length 30 mm
Diameter 6 mm
Compact filter box
25 filters inside
Non-magnetic copper box, gold-plated for best thermal contact
Easy to mount at 10 mK
30 x 56 x 70 mm, 400 gr