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

Model No. UPJ

Looking ahead the era of Ultra-low/Super conductivity technology, the rise of Quantum-computing, KEYCOM has specially developed and refined superconducting cables, super low temperature coaxial cables for various applications, millimeterwave dielectric material waveguides, and systems since late 1990's.

As a result, we have won the trust of customors worldwide, providing high-quality tools / components / systems to more than 200 research institutes.

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	Low-Noise Amplifier for Cryo
	Powder Filter for Coaxial Cables	E	Semi-Rigid Copper Cable Assemblies
	Cryogenic Millimeter-Wave / Microwave Test Fixtures and Calibration Kits	F	Ultra-Compact Attenuators for Cryogenic
		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

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

	1.1. Semi-Rigid Cables for Cryogenic (Super Low Temperature) Applications [UPJ02]		1.2. Superconducting Coaxial Cable Assemblies (0. 085" type Nb-Nb Superconducting Coaxial Cable Assemblies) [UPJ06]
	KEYCOM offers a variety of superconducting semi-rigid coaxial cables for cryogenic applications, from which you can select based by features as heat conductivity, flexibility, insertion loss, permeability etc., to meet upon your 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 Assembly with niobium conductor, having achieved world-wide fame of research institutions. Operating frequency is DC - 40GHz by default, but available up tp 65GHz upon request. Minimum bend radius: 30mm
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	1.3. Superconducting Coaxial Cable Assemblies (0.085" type NbTi-NbTi Superconducting Coaxial Cables) [UPJ07]
	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: 30mm Copper inner-coated Stainless coaxial cables are effective and useful for a temperature range of between room temperature and 4k.
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	1.4. Dielectric Waveguide Assembly for Millimeter Wave [MMT01]		1.5. Filter Cables [UPJ22]
	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)		A thin and flexible coaxial cable that provides strong attenuation.
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1.6. Cryogenic Twisted-Pair Signal Cables [UPJ24]

1.7. Plug Connectors (MMCX / GPPO type) [UPJ13]

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 for coaxial cables.

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1.8. Powder Filter for Coaxial Cables [UPJ21]

1.9. Semi-Rigid Copper Cable Assemblies [UPJ25]

A copper powder filter that reduces high-frequency noise for cryogenic experiments.

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2. Components for Ultralow temperatures and Superconductivity

	2.1. Hermetic Seal Adapters [UPJ23]		2.2. Low-Noise Amplifier for Cryo [UPJ05]
	Hermetic seal adapters designed to secure high vacuum. Please contact us for you specific customization request.		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.
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	2.3. ryogenic Millimeter-Wave / Microwave Test Fixtures and Calibration Kits [UPJ10]
	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.
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	2.4. 110~140GHz Oscillator Systems [UPJ20]		2.5. Ultra-Compact Attenuators for Cryogenic [UPJ12]
	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.		* All cases, connectors, contacts and resistors are non-magnetic. * Cryogenic-resistant with resistors made of a non-superconductive material. * Male-female connectors. * 50Ω system.
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3. System for Ultralow temperatures and Superconductivity

3.1. Cryogenic (super low temperature) system [UPJ01]

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.

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