KEYCOM provides solutions in the 300 GHz to 1 μHz frequency range (SHF/EHF/MW/UHF/VHF/ULF).
We undertake designing, manufacturing and measuring. Please feel free to contact us.

Superconducting Coaxial Cable Assemblies
(0.085" / 0.047" type NbTi-NbTi Superconducting Coaxial Cables)

Model No. UPJ07
FEATURE

Superconduction coxial cable for cryogenic and strong electromagnetic field,
recognized by research institutions all over the world.
Highly effective at thermal gradient below 4K.

* Very low thermal conductivity; 1/3000 of copper(Cu), 1/300 of niobium(Nb).
* Highly durable in strong electromagnetic field of up to 11T(tesla).
* NbTi(Nb:50%)=3×10-4 [W/cm]
* 40GHz standard, available up to 65GHz
* Minimum bend radius: 30mm
* For strong magnetic field
Copper inner-coated Stainless coaxial cables are effective and useful for a temperature range of between room temperature and 4k.

Acknowledgements

EPJ Quantum Technology, 04 May 2017


Philipp Kurpiers* ,TheodoreWalter,PaulMagnard,YvesSalatheandAndreasWallraff
DepartmentofPhysics,ETHZürich, Zürich,CH-8093,Switzerland
"Characterizingtheattenuationofcoaxial andrectangularmicrowave-frequency waveguidesatcryogenictemperatures"
https://epjquantumtechnology.springeropen.com/articles/10.1140/epjqt/s40507-017-0059-7
※Evaluation of Keycom's NbTi Superconducting Coaxial Cables and actual measurement result of temperature/frequency/strong magnetic field - characteristics of attenuation amount are reported in a paper of ETH Zürich.

Nature Vol. 398, No. 6730, pp.786 - 788, 29 April 1999

Y. Nakamura*, Yu. A. Pashkin & J. S. Tsai
NEC Fundamental Research Laboratories, CREST, Japan Science and Technology Corporation (JST)
"Coherent control of macroscopic quantum states in a single-Cooper-pair box"
※Keycom's Superconducting Coaxial Cables, Cryogenic Coaxial Cables, Cryogenic printed boards are used.

Materal Characterstics

w/cmk at 1K(1) dB/m at 10GHz,4K(2) effect(1)*(2)
Cu 0.15 1 0.15
Ag 1 1.1 1.1
Bs:Cu65% 0.007 1.47 0.010
(non-magnetic)
SUS304 0.0015(ULT05) 1.14 0.002
Nb 0.1 0.8 0.08
(non-magnetic)
NbTi:Nb47% 0.0003 1.0 0.0003
PTFE 0.000035
*Measurements were taken after superconducting coaxial cables became completely super conductive.

Insertion Loss

Pulse propagation property of 10m NbTi-NbTi 085 at 4K including short length extension cable at room temperature

Specification

Part Number

Max. Frequency

(GHz)

Outter Conductor Dielectroic Inner Conductor Heat Quantity (μw/k)*

Min. Bending Radius

(mm)

Available Connectors

Diameter

(mm)

Material

Diameter

(mm)

Material

Diameter

(mm)

Material 4K-20K

NbTiNbTi085


40(upto 65GHz)

2.20


NbTi

1.62


PTFE

0.51


NbTi
0.3

30.0

SMA, APC2.9, APC2.4, APC1.85

NbTiNbTi047

1.19
0.94
0.29
0.09
10.0

Part No.

NbTiNbTi085A - K(m)K(f) - 1000
Cable type Connector name Connector phase front length (mm)
max. 1000mm
0.085" type
Applicable connectors SMA, APC2.9, APC2.4, APC1.85
A crimping connection is standard.

Pictures