• General I/O to cold stages • high power lines • building block for general I/O

• Simpilicity • Wide band transmission • Low power loss

• 8 Channels per flex *High-density microwave channels • Resilient against thermal cycling • Optional filtering & signal conditioning • Integrated vacuum feedthrough • Low thermal load

Signal Lines

RF Lines Specifically Designed For Cryogenics

Tackle your cryogenic cabling challenge. Bringing many channels to your cold stage, signal lines provide a simple and elegant solution for a wide range of applications.Signal lines are the most simple ways to get your i/o to your cold stage. Whether you go for the Silver (Ag)-platform or go superconducting (NbTi), it is suitable for many situations.

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Unfiltered NbTi and Ag lines

Out of the box installation

Up to 100 cm length

Up to 18 GHz frequency range

Super flexible

Customizable connectors

Sturdy and durable

Technical Data

General Specifications	Unit
Connector Type	SMA female / SMP
Connector Housing	Goldplated O2-Free Copper
Flex length	200 to 1100 mm
Amount of channels	8 Channels
Flex Thickness	0.3 mm
Flex Materials	Polyimide & Silver (Ag) or NbTi
Transmission type	Stripline
Minimum bending radius	5 mm
Required length for longitudinal rotation	10 cm / 180° rotation
Vacuum Feedthrough Leak rate	<10-9 mbar L s-1
Compatible vacuum connections	KF25/40, ISO 100 side and top loader ports

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All measurements shown on this page are based on a flex cable containing eight channels without components. The mean is shown with a thick line and the spread of all channels is shown with the transparent area.

flux-drive-signal-graphs-03-1024x512 (1).png

A common concern for high-density microwave signaling is crosstalk. Our multichannel Cri/oFlex® 3 allows for high line density with good isolation. On the right, the near-end crosstalk (NEXT) and equal level far-end crosstalk (EL-FEXT) between channels in a room-temperature 20 cm long Ag Cri/oFlex® 3 with a 1 mm channel pitch are plotted. The solid line is the average of all channel combinations and the semitransparent the area shows the best (furthest) and worst case (nearest channels) of an 8-channel flex. Even in the worst case, crosstalk is below -60 dB for signals up to 10 GHz. NbTi Cri/oFlex® has comparable performance.

EL-FEXT_AG-together-with-NEXT_Ag_18GHz-6

The transmission of Cri/oFlex® can be as low as 1.5 dB/m at 6 GHz for NbTi. For our Silver (Ag) platform a typical 6 dB/m at 6 GHz at low temperatures is normal. In the field these losses are denoted as insertion losses.

On the graph the Silver transmission is plotted for different temperatures.

Below the transmission are the S11 reflections graphs shown. These are known in the field as reflection losses, as they appear as reflections for the system. The Cri/oFlex® is overall well below 15 dB for each reflection.

System Integration

There is a wide variety of cooling solutions for quantum computing and low temperature experiments, ranging from lab size dilution refrigerators to small 4K table-top systems. As an i/o provider, it is our task to connect quantum devices and cold experiments to the control electronics regardless of the cooling implementation. To that end we have developed standardized solutions that fit (or can be made to fit) all fridges.

Whether you are purchasing a new system or want to refurbish your current system, Cri/oFlex® provides a solution.

Wiring Ports

Have a spare port in your fridge and want to add extra lines or replace an existing wiring port with a higher density cabling solution?

We supply vacuum feedthroughs, Thermal clamps, Brackets and Cri/oFlex® laminates for all standard ports you will find in dilution refridgerators.

Out of the box solution

Fits for all standard ports

Upgrade existing systems

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Dive Deeper Into Cri/oFlex Technology

Core Technology

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Connectors

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