Title :
Attenuation of microwave filters for single-electron tunneling experiments
Author :
Fukushima, Akio ; Sato, Akira ; Iwasa, Akio ; Nakamura, Yasuhiro ; Komatsuzaki, Takeshi ; Sakamoto, Yasuhiko
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
4/1/1997 12:00:00 AM
Abstract :
Two types of microwave filters, metallic powder filters and a filter using a resistive coaxial cable, were tested. Attenuation of the metallic powder filters using copper or stainless steel (SUS304L) was measured at 300 K, 77 K, and 4.2 K, and it was found that SUS304L powder of nominal 30 μm grain size gives best result as the microwave filter for single electron tunneling (SET) experiments. Attenuation of a coaxial filter, or Thermocoax with SMA connectors attached at both ends is larger at low temperatures than that at room temperatures, and the temperature dependence of the attenuation does not agree with Zorin´s model. The filter arrangement in a cryostat designed for SET experiments, is also reported
Keywords :
attenuation measurement; coaxial cables; copper; cryostats; microwave filters; powder metallurgy; quantum interference devices; stainless steel; tunnelling; 300 K; 4.2 K; 77 K; Cu; FeCrC; SET; SMA connectors; SUS304L powder; Thermocoax; Zorin´s model; coaxial filter; copper; cryostat; metallic powder filters; microwave filters; resistive coaxial cable; room temperatures; single electron tunneling; single-electron tunneling experiments; stainless steel; Attenuation measurement; Coaxial cables; Copper; Microwave filters; Microwave measurements; Powders; Steel; Temperature dependence; Testing; Tunneling;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
