Control & Readout
Coaxial cable assemblies for quantum
Supplier :
- Ultra-Flexible superconducting cables
- Soldered connectors (patent pending)
- Outer connector braided with fine niobium-titanium wires
Quantum coax innovations bring value in terms of signal integrity, easy handling and robustness
Quantum coax achieves a breakthrough with 2 unique technologies. Soldered connectors on an NbTi cable for incomparable signal integrity and a braided outer conductor with fine niobium-titanium wires for easy handling.
ABOUT
SYSTEM FEATURES
Ultimate easy handling
The outer conductor of the flexible superconducting niobium-titanium MicroFlex cable is a wire braid constructed of fine niobium-titanium wires. The flexible MicroFlex cable makes the routing of coaxial cables at their final destination (such as a QPU) much easier than traditional semi-rigid coax cable.
Never again spend your evenings in the lab bending cables
Signal integrity
With NbTi cables, the main source of signal integrity loss is the connection between different materials (cables to connectors). Niobium-Titanium is extremely difficult to solder. Quantum Coax’s patented soldering technology create the best electrical connection at the cable/connector interface and achieves incomparable low loss and low noise connection.
Robustness
On NbTi cables (commonly used crimp-style connectors), the most fragile part is the connector-cable junction.
Quantum Coax Soldered connector create a connection that is robust enough for numerous thermal cycles.
The braided outer conductor allows you to handle and change your cable assembly many times without damaging it.
Minimizing heat loads
Niobium-titanium coax cable offers the ultimate solution for maintaining signal integrity while minimizing heat loads at low temperatures. When cooled below its superconducting transition temperature of 9.2K, the NbTi center conductor provides a zero resistance wire for signal transmission while the superconducting outer conductor utilizes the Meissner effect to protect the transmitted signal from interference.
Large connector Options
– SMA
– SMP
– SMPM
– SSMA
– 2.92mm
– MMCX
– Non-magnetic connector options
All soldered connections
Custom designs available
Have a different application or need something slightly different than what is offered in our catalog? Contact us! We are able to customize the size, material, and other properties to match the needs of your application.
PRODUCT
SPECIFICATIONS
Flexible Superconducting Niobium-Titanium Coax (Patent Pending)
- Cable Outer Diameter: 0.040"
- Characteristic Impedance: 50Ω
- Center conductor material: NbTi
- Outer conductor material: NbTi braid
- Dielectric material: PTFE
- minimum bend radius ~6mm
- Cutoff frequency : 123.48 GHz
- Attenuation : less than 0.45 dB/ft @ 20 GHz 4K
- Heat Load : 0.010 µW (0.1K to 1K with 12 inches Cable Length)
Flexible Phosphor Bronze Coax
- Cable Outer Diameter: 0.040"
- Characteristic Impedance: 50Ω
- Center conductor material: Phosphor bronze
- Outer conductor material: Phosphor bronze braid
- Dielectric material: PTFE
- minimum bend radius ~6mm
- Cutoff frequency : 123.48 GHz
- Attenuation : 2.68 dB/ft @ 10 GHz 4K
- Heat Load : 0.091 µW (0.1K to 1K with 12 inches Cable Length)
Flexible Stainless Steel Coax
- Cable Outer Diameter: 0.040"
- Characteristic Impedance: 50Ω
- Center conductor material: 304 Stainless steel
- Outer conductor material: 304 Stainless steel braid
- Base Temperature < 3.5K
- Dielectric material: PTFE
- minimum bend radius ~6mm
- Cutoff frequency : 123.48 GHz
- Attenuation : 5.07 dB/ft @ 10 GHz 4K
- Heat Load : 0.012 µW (0.1K to 1K with 12 inches Cable Length)
OTHER
OPTIONS
- SMA, SMP, SMPM, SSMA, 2.92mm, MMCX, Non-magnetic connector options All soldered connections
We are able to customize the size, material, and other properties to match the needs of your application
How and Why
Game Changer on these applications
1
Superconducting Qubits
Ultra Low passive heatload.
Soldered connection minimize active heatload because lower signal loss also reduces the amount of heat generated.
Minimal points of failure.
2
Spin Qubits
Non-magnetic connectors, no interference with magnetic field.
Soldered connections provide very low signal attenuation, thus not limiting high-frequency performance.
3
Low T° characterization
Ultra Low passive heatload.
Plenty of connector options.
Minimal points of failure.
reviews
photo gallery
The installation and management of cable assemblies inside the fridge is a critical challenge for scientists.
Each coaxial cable must be carefully routed, attenuated, and thermalized.
This involves hundreds of cables, connectors, filters—all demanding time and effort.
Tim has worked hard on developing new solutions to tackle the problem.
He has improved connector quality and completely modified the outer conductor structure of NbTi coaxial cables.
The result is improved performance and a revolution in the ease with which cables can be used in fridges.
Qnity is delighted to be associated with Quantum Coax and to share its innovative spirit and high-tech expertise with our customers.
