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.

Cryogenic (Super-Low temperature)/Superconductive Cables, Components and Systems

Model No. UPJ
Keycom has done extensive research into the technology of microwave and electromagnetic wave transmission and harmonization with heat insulation methods. The company has developed superconducting cables, super low temperature coaxial cables for various applications, millimeterwave dielectric material waveguides, and systems utilizing aforementioned products.
J K L Signal cable   A, B Semi-Rigid Cables for Cryogenic (Super Low Temperature) Applications
M Protective conductor   C-1 Superconducting Coaxial Cable Assemblies (0. 085" type
Nb-Nb Superconducting Coaxial Cable Assemblies)
      C-2 Superconducting Coaxial Cable Assemblies (0.085" type NbTi-NbTi Superconducting Coaxial Cables)
  Cryogenic Twisted-Pair Signal Cables    D Cryogenic Low Noise Amplifier
  Powder Filter for Coaxial Cables    E Semi-Rigid Copper Cable Assemblies
  Cryogenic Millimeter-Wave / Microwave Test Fixtures and Calibration Kits    F Compact and Ultra-Compact Attenuators (operable at ultra-low temperatures)
   G Plug connectors (MMCX / GPPO type) for coaxial cables for use at ultra low temperatures
  110~140GHz Oscillator Systems    H Filter Cables
  Straight metallic waveguides with low heat conductivity    I Dielectric Waveguide Assembly for Millimeter Wave
  Cryogenic (Super low temperature) system    N Hermetic Seal Adapters

Cryogenic (super-low temperature) and superconductive coaxial cables and components

Semi-Rigid Cables for Cryogenic (Super Low Temperature) Applications
upj02002001108-07
KEYCOM offers wide variety of superconducting semi-rigid coaxial cables for cryogenic applications,
shown below in Table 1, from which you can select based on such features as heat conductivity,
flexibility, insertion loss, permeability, or thickness to meet your specific requirements.
They are low in heat conductivity, minimizing inflow of the heat from the high-temperature end. 
Operating frequency is DC-40GHz by default, but available up to 65GHz upon request.
The characteristic impedance is 50Ω.
 
Superconducting Coaxial Cable Assemblies (0. 085" type Nb-Nb Superconducting Coaxial Cable Assemblies)
upj06002011209-01
Superconducting Coaxial Cable Assembly with niobium conductor,
recognized by research institutions all over the world.
Operating frequency is DC - 40GHz by default, but available up tp 65GHz upon request.
Minimum bend radius: 70mm
 
Superconducting Coaxial Cable Assemblies (0.085" type NbTi-NbTi Superconducting Coaxial Cables)
upj07002011209-01

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 heat conductivity that is a 1/3000 that of Copper and a 1/300 of Niobium(Nb).
* High durability in use to 11 T(Tesla)
* NbTi(Nb:50%)=3×10-4 [W/cm]
* 40GHz standard, available up to 65GHz
* Minimum bend radius: 70mm
Copper inner-coated Stainless coaxial cables are effective and useful for a temperature range of between room temperature and 4k.

 
Dielectric Waveguide Assembly for Millimeter Wave
mmt01002011209-03
With its transmission part being made only of dielectrics, this dielectric waveguide assembly possesses flexibility and extremely low insertion loss for millimeter waves.
It is suitable for insulation of high voltage, or between cryogenic temperature and room temperature.
(Awarded Plunkett Award by DuPont Co., US)
 
Filter Cables
upj22002040405-02
A thin and flexible coaxial cable that provides strong attenuation.
 
Cryogenic Twisted-Pair Signal Cables
upj 24002051017-05
Its twisted-pair cable structure reduces common mode noise drastically.
The shielding pipe will prevent heat inflow from the outer environment of higher temperature.
 
Plug Connectors (MMCX / GPPO type)
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Plug connectors for coaxial cables.
 
Powder Filter for Coaxial Cables
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A copper powder filter that reduces high-frequency noise for cryogenic experiments.
 
Semi-Rigid Copper Cable Assemblies
upj25002051125-01
 

Components for use at ultralow temperatures and superconductivity

Hermetic Seal Adapters
upj230021017-05
Hermetic seal adapters designed to secure high vacuum.
Please contact us for you specific customization request.
 
Cryogenic Low Noise Amplifier
upj05002020825-08

KEYCOM’s cryogenic low noise amplifiers are designed and manufactured to perform at their peak levels at extreme low temperatures (below 74K).
They are used for such applications as the head amplifiers of passive radars as well as versatile cryogenic experiments and researches.

 
Cryogenic Millimeter-Wave / Microwave Test Fixtures and Calibration Kits
upj10002040405-01
Test fixtures and correction kits specifically designed for use at ultralow temperatures for testing the performance of patterns between the edges of printed boards (edge type) and circuit testing inside the printed boards (probe type).
We aim for drastic reduction of the influence of thermal shrinkage as well as for the miniaturization and the reduction of the heat capacity of our devices. In addition, our product line includes products operating in the 1 μHz - 300 GHz (infrasonic / VHF / UHF / microwave / millimeter wave / super-high) frequency range.
 
110~140GHz Oscillator Systems
upj 20002041107-09
KEYCOM offers a millimeter-wave oscillator with variable attenuator whose frequency range is mechanically variable between
110GHz and 140GHz. The output can be read with a power meter.

*Please ask your KEYCOM representative for frequency ranges of your request.
 
Compact and Ultra-Compact Attenuators (operable at ultra-low temperatures)
upj12131050528-01
* Ultra-compact(φ=5.2 mm, length 15.5 mm).
* All cases, connectors, contacts and resistors are non-magnetic.
* Cryogenic-resistant with resistors made of a non-superconductive material.
* Male-female connectors.

System for use at ultralow temperatures and superconductivity

Cryogenic (super low temperature) system
upj01002021207-10
KEYCOM develops systems for various applications using coaxial cables for cryogenic temperature applications, millimeterwave dielectric material waveguides, motherboards for low temperature use, chip carriers, and refrigeration units.