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.

Cable List

Model No. List of Cables
Feature

The following is a list of cables handled by Keycom.
Customization is available upon request.

1.Semi-Rigid Cables for Cryogenic (Super Low Temperature) Applications
 »Click here for product details[UPJ02] 

Part No. Feature Max.
operating
frequency
(GHz)		 External conductor Dielectric Internal conductor Thermal
conductivity
(uW・cm/k)		 Insertion loss (dB/m) at 10GHz Insertion loss (dB/m) at 300K Min.
bending
radius
(mm)
Outer
diameter
(mm)		 Material Outer
diameter
(mm)		 Material Outer
diameter
(mm)		 Material 300K 110K 77K 20K 4K 1GHz 10GHz 20GHz 40GHz 60GHz
ULT-01 Minimal heat conductivity 66 2.2 [085 inch type] SUS304 1.62 Foamed PTFE 0.51 SBC 170 5.32 4.07 3.85 2.49 2.39 1.64 5.32 6.98 11.17 17.30 12.0
ULT-04 Non-magnetic BS SBS 250 2.87 2.29 1.96 1.47 1.47 1.21 2.87 5.00 7.30 9.10 10.0
ULT-05 Low heat conductivity and low insertion loss Cu（5μm） +SUS304 325 4.10 2.80 2.70 1.95 1.90 1.50 4.10 5.10 7.80 11.70 12.0
ULT-06 Easy to bend  CuNi SCuNi 210 3.70 2.43 2.31 1.55 1.49 1.17 3.70 5.23 7.77 11.88 12.0
ULT-07 Easy to bend  CuNi CuNi 60 10.50 9.50 9.00 8.00 7.20 3.32 10.50 14.85 21.00 25.72 12.0
ULT-08 Low heat SUS304 SSUS 200 7.70 6.47 6.25 4.89 4.79 2.43 7.70 10.89 15.40 18.86 12.0
ULT-10 Thin 119 1.19 [047 inch type] BC 0.94 0.29 SBC 170 4.70 3.80 3.33 2.90 2.75 1.40 4.70 6.80 9.87 14.90 6.5
ULT-11 Thin CuNi SCuNi 100 6.70 5.60 5.45 4.25 4.17 2.60 7.00 10.50 14.00 20.00 6.5
ULT-12 Thin CuNi CuNi 14 19.00 17.50 17.00 16.00 15.00 5.40 16.50 23.00 34.00 42.50 6.5
ULT-13 Low heat SUS304 SSUS 99 8.80 7.80 7.40 7.00 6.90 2.78 8.80 12.45 17.60 21.56 7.0
ULT-20 Very thin 170 0.86 [034 inch type] BC 0.66 0.2 SBC 170 11.50 7.24 6.87 4.60 4.45 3.90 11.50 16.50 23.50 28.00 3.2
ULT-21 Very thin CuNi SCuNi 70 9.80 5.86 5.56 4.72 4.58 4.11 9.80 15.30 21.69 31.57 3.2
ULT-22 Very thin CuNi CuNi 9.5 21.91 17.90 15.50 14.50 13.50 7.12 21.97 30.94 44.00 54.00 3.2
ULT-23 Low heat SUS304 SSUS 67 24.00 19.90 17.50 16.50 15.50 7.59 24.00 33.94 48.00 58.79 4.0
ULT-30 Ultra thin 430 0.33 [013 inch type] SUS304 0.26 0.08 SUS304 1 66.90 52.00 47.40 40.10 39.00 21.10 66.90 94.70 140.50 215.00 1.5

*SBC: Silver plated beryllium copper , BS:Brass, SBS: Silver plated brass , BC: Beryllium copper,  CuNi: Cupronickel, SCuNi: Silver plated cupronickel,  SSUS: Silver plated SUS304

 

2.Semi-flexible Cables for Cryogenic (Super Low Temperature) Applications

Part No. Feature Max.operating frequency(GHz) External conductor Dielectric Internal conductor Insertion loss (dB/m) at 300K Min. bending radius(mm)
Outer diameter(mm) Material Outer diameter(mm) Material Outer diameter(mm) Material 1GHz 10GHz 20GHz 40GHz
ULT-101 Non-magnetic and Easy to bend  37 3.58[141 inch type] CTC 2.90 PTFE 1.03 SPC 0.55 1.99 3.23 5.74 30.0
ULT-102 Non-magnetic and Easy to bend  60 2.2[085 inch type] 1.68 0.51 0.81 2.75 4.18 6.66 20.0
ULT-103 Non-magnetic and Easy to bend  116 1.19[047 inch type] 0.86 0.29 1.34 4.55 6.74 10.28 15.0
ULT-104 Non-magnetic and Easy to bend  178 0.86[034 inch type] 0.62 0.19 1.61 5.47 8.18 12.64 10.0

CTC：Copper-Tin Composite　SPC：silver-plated copper

3.Superconducting coaxial cable assemblies(0.085" / 0.047" / 0.034" type NbTi-NbTi Superconducting Coaxial Cables)
 »Click here for product details[UPJ07] 

Part No. Feature Max.operating frequency(GHz) External conductor Dielectric Internal conductor Thermal conductivity
(uW・cm/k)		 Insertion loss (dB/m) at 10GHz Insertion loss (dB/m) at 300K Min. bending radius(mm)
Outer diameter(mm) Material Outer diameter(mm) Material Outer diameter(mm) Material 300K 4K 1GHz 10GHz 20GHz 40GHz
NbTiNbTi085 Minimal heat conductivity 66 2.2 [085 inch type] NbTi 1.62 Foamed PTFE 0.51 NbTi 26.00 12.96 0.06 3.90 13.0 17.89 26.89 30.0
NbTiNbTi047 Minimal heat conductivity 119 1.19 [047 inch type] 0.94 0.29 7.40 18.80 0.08 6.67 18.8 25.71 36.70 10.0
NbTiNbTi034 Minimal heat conductivity 170 0.86 [034 inch type] 0.66 0.20 4.50 29.71 0.12 9.33 29.7 42.56 61.73 8.0

Variation of insertion loss with frequency(4K,10mK)

This is an extract of a part of the ETH Zürich's paper above on measurement results using KEYCOM products(Page 9 of 15).

Superconducting Coaxial Cable Assemblies
(0.085" / 0.047" / 0.034" type NbTi-NbTi Superconducting Coaxial Cables)

Superconducting coaxial 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 66GHz
  • 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.
  • Connectors available for ;
    •    GPPO, SMA, APC2.9, APC2.4, APC1.85