Microwave waveguide for quantum voltage device and quantum voltage device

A microwave waveguide and quantum technology, used in waveguides, waveguide-type devices, circuits, etc., can solve the problems of not meeting the operating conditions of quantum superconducting chips, reducing the thermal conduction power of signal connection channels, and reducing the thermal conduction power of microwave channels. Quantity margin, reduce thermal power, good excitation and hold effect

Active Publication Date: 2022-04-22
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cooling power of the refrigerator is limited. In the design of the low temperature system, the heat conduction power of the signal connection channel needs to be reduced, that is, the heat conduction power of the microwave channel needs to be reduced.
The waveguide in the quantum voltage device is a microwave signal transmission channel, which connects the normal temperature area and the 4K low temperature area, and works at 65GHz to 75GHz. Usually, a straight-through metal waveguide is used. As we all know, metal is a good conductor of heat. Common waveguide materials such as copper, aluminum, etc. The thermal conductivity of metal is very large. Due to the limited cooling capacity of the refrigerator, the temperature in the low temperature area will inevitably rise, which cannot meet the operating conditions of the quantum superconducting chip.

Method used

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  • Microwave waveguide for quantum voltage device and quantum voltage device
  • Microwave waveguide for quantum voltage device and quantum voltage device

Examples

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Effect test

Embodiment 1

[0028] as Figure 1As shown, the present embodiment provides a microwave waveguide 6 for a quantum voltage apparatus, comprising: a waveguide flange (6-1); a brass waveguide (6-2), connected to the waveguide flange (6-1); a polytetrafluoroethylene strip (6-3), comprising a vertebral portion (6-4) and a cone portion located at both ends of the vertebral body portion (6-5), the taper portion is a taper tip structure, the vertebral portion is inserted within the brass waveguide.

[0029] The waveguide flange (6-1) can be a UG-387 / U flange. Brass waveguide (62) may be a WR-12 brass waveguide, which is 10cm in length, located at both ends of microwave waveguide 6, the upper end of which is used to connect with the waveguide flange of the quantum superconducting chip with screws, and the lower end is used to connect with the vacuum isolated waveguide flange.

[0030] Polytetrafluoroethylene strips (6-3), comprising a vertebral body portion (6-4) and a tapered portion located at both en...

Embodiment 2

[0036] as Figure 2 As shown, the present embodiment provides a quantum voltage apparatus in which the microwave waveguide proposed in Example I is fixed in the quantum voltage apparatus (6).

[0037] The ultra-low temperature structure of the electronic voltage device adopts a temperature insulation and vacuum structure, and the waveguide interface is reserved, and the quantum voltage device includes the following components:

[0038] Vacuum cover, the vacuum cover defines the vacuum chamber (1), to ensure that the interior is vacuum, the vacuum degree is better than 1E-3, fixed to the refrigerator by screws and other sealing technology, and a multi-layer insulation material is pasted inside it;

[0039] A first-level cold head (4), disposed in the vacuum chamber (1), the first-level cold head (4) is an inherent component of the refrigerator, providing a 40K temperature zone insulation area for the chip, and pre-cooling for the electrical signal cable;

[0040] Secondary cold scre...

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PUM

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Abstract

The invention discloses a microwave waveguide for a quantum voltage device and the quantum voltage device. The microwave waveguide of the quantum voltage device comprises a waveguide flange; the brass waveguide is connected with the waveguide flange; the polytetrafluoroethylene strip comprises a cone part and cone end parts located at the two ends of the cone part, the cone end parts are of cone tip structures, and the cone part is inserted into the brass waveguide. According to the microwave waveguide provided by the invention, the polytetrafluoroethylene material with low thermal conductivity is added into the microwave waveguide, and the thermal conductivity of the polytetrafluoroethylene strip is far lower than that of metal, so that the heat transfer power of the microwave waveguide can be greatly reduced, the temperature of a low-temperature area is prevented from rising under the condition that the refrigerating capacity of a refrigerating machine is limited, and the operation condition of a quantum superconducting chip is met.

Description

Technical field [0001] The present invention belongs to the field of microwave waveguide technology, particularly relates to a microwave waveguide for a quantum voltage device and a quantum voltage device. Background [0002] The quantum voltage standard is a natural reference for voltage parameters, the most accurate and highest level of voltage parameter generation and measurement devices based on the physical effects of AC Josephson, and has a wide range of applications in high-end measurements such as electrical metering, aerospace, and voltage in weapon systems. The standard device is mainly composed of a refrigeration system, a microwave drive source, a biased electrical signal drive source, a quantum voltage superconducting chip, and a microwave and electrical signal transmission unit. The refrigeration system provides an ambient temperature of 4.2K (or other chip-related) for the quantum superconducting chip to ensure that the chip enters the superconducting state; the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P3/10H05K7/20
CPCH01P3/10H05K7/2039
Inventor 焦玉民
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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