Flexible transmission system for superconducting quantum computing

Abstract

The invention discloses a flexible transmission system for superconducting quantum computing, and belongs to the technical field of flexible transmission, the flexible transmission system comprises a normal temperature mounting disc, a sealing cavity capable of expanding in the Z-axis direction is mounted on the normal temperature mounting disc, and a multi-channel airtight connector module is mounted on the sealing cavity; the actual installation number of the multi-channel airtight connector modules can be adjusted within the range of 1-20 or above. According to the invention, through the designed multi-channel radio frequency rigid-flex board or flexible circuit board, the circuit in the FPC can stably work at a high frequency up to 10GHz at normal temperature and low temperature, and has excellent performances of low insertion loss, return loss and the like, the installation height and the bending degree are adjusted through the first section of flexible transmission circuit board Rigiid-Flex PCB / FPC, and the installation efficiency is improved. The path length difference is compensated, the transmission length of each path of signal is ensured to be consistent, the transmission loss consistency of each channel is further ensured, and a stable and reliable signal transmission basis is provided for the superconducting quantum computer.

Description

Technical Field

[0001] The present invention belongs to the technical field of flexible transmission, and particularly relates to a flexible transmission system for superconducting quantum computing. Background Art

[0002] As an important technical route of quantum computing, superconducting quantum computing has developed extremely rapidly in recent years, achieving remarkable breakthroughs in many fields. It is currently the technical direction closest to realizing quantum supremacy and constructing a commercial quantum computer. With the continuous improvement of the requirements for quantum computing performance, increasing the number of qubits and improving the fidelity of superconducting quantum computers have become key tasks.

[0003] However, existing superconducting quantum computers have serious defects in signal transmission. Traditional solutions usually use coaxial cables or superconducting wires for transmission, which will occupy a large amount of space load and thermal load. In the development process of multi-qubit superconducting quantum computers, the problems of space and thermal load have become huge obstacles. A large amount of space is occupied by transmission lines, restricting the integration of more qubits within a limited volume; at the same time, excessive thermal load will affect the performance of superconducting chips and reduce the fidelity of qubits, severely restricting the further development of multi-qubit superconducting quantum computers and making it difficult to meet the growing quantum computing needs.

[0004] To avoid the above technical problems, it is necessary to provide a flexible transmission system for superconducting quantum computing to overcome the defects in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a flexible transmission system for superconducting quantum computing to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A flexible transmission system for superconducting quantum computing, including a room-temperature mounting plate, on which a sealed cavity that can be expanded in the Z-axis direction is mounted. A multi-channel airtight connector module is mounted on the sealed cavity. The actual number of installed multi-channel airtight connector modules can be adjusted within the range of 1 - 20 and above, and is connected to the sealed cavity to form a complete vacuum-sealed airtight cover plate. And the airtight cover plate and the multi-channel airtight connector module are of a whole-surface detachable structure; The first-stage flexible transmission circuit board Rigid-Flex PCB / FPC installed through a mounting fixture, and the first-stage flexible transmission circuit board Rigid-Flex PCB / FPC compensates for the path length difference caused by the installation of the airtight cover plate by adjusting the installation height and the degree of internal and external bending, so that the signal transmission lengths of all channels are kept consistent.

[0007] As a preferred embodiment, the multi-channel airtight connector module is connected to the integrated panel or directly connected to the measurement and control chassis through the adapter joint and its tail coaxial cable.

[0008] As a preferred embodiment, it further includes an inter-board interconnection adapter. The upper and lower flexible lines are connected through the inter-board interconnection adapter. A radio frequency patch attenuator is welded on the flexible board near the inter-board interconnection adapter section, and the outer shielding cover is closely attached to the radio frequency patch attenuator.

[0009] As a preferred embodiment, at the 10mK disk, the flexible line is fixed and conducts heat by being tightly clamped by the two-side heat sinks; at the MC disk, a high-density coaxial band-pass attenuator group is installed along the X-axis and Z-axis.

[0010] As a preferred embodiment, the Rigid-Flex PCB / FPC is fabricated using the printing and lamination processes of ordinary flexible circuit boards. The Rigid-Flex PCB is composed of multi-layer / single-layer FPC and multi-layer / single-layer rigid board PCB. The radio frequency signal is mainly transmitted through the internal circuit structure of the FPC. The common transmission structure in the FPC internal circuit is the microstrip line, and it can also adopt microstrip, coplanar waveguide, rectangular waveguide, and rectangular coaxial structures for transmission. The core board material of the FPC is a high-frequency flexible board material.

[0011] As a preferred embodiment, the high-frequency flexible board materials include MPI and LCP. The copper layer of the FPC selects one of pure copper, constantan, nickel copper, manganese copper, and aluminum foil. The PP is the bonding layer for bonding.

[0012] As a preferred embodiment, the rigid board PCB is used for reinforcement, impedance compensation, and heat conduction. The rigid board PCB can be replaced by a metal pressing block. The metal pressing block can increase the external heat conduction performance of the FPC. Windows or slots are provided on the rigid board PCB or the metal pressing block to cooperate with the FPC to achieve local radio frequency impedance compensation. The local radio frequency impedance compensation includes line pad vias, via holes, pads, and welding parts; Among them, the line pad vias correspond to specific line connection positions, the via holes are used for interlayer electrical connection, and the pads and welding parts are the actual welding operation areas.

[0013] As a preferred embodiment, in the sealed environment composed of a sealed cavity, an airtight cover plate, and a multi-channel airtight connector module, the first-section flexible transmission line board Rigid-Flex PCB / FPC is installed through a mounting fixture and the height and internal and external bending degrees are adjusted. While ensuring the isolation degree between adjacent radio frequency channels, through the dense arrangement of radio frequency lines, the maximum number of single-board channels is ensured. In the dilution refrigerator, the Z-axis direction of the connection parts of each board is stepped and misaligned to maximize the load utilization rate in the three-dimensional space.

[0014] As a preferred embodiment, in addition to the Rigid-Flex PCB / FPC, the transmission component further includes mounting components for fixing / shielding / heat sinking and radio frequency components for realizing other radio frequency signal functions. On the basis that the height and bending degree of the first-stage flexible transmission line board Rigid-Flex PCB / FPC are adjusted by a mounting fixture to compensate for the path length difference, these radio frequency components cooperate with the Rigid-Flex PCB / FPC to realize the signal transmission function; Among them, the radio frequency signal functions include attenuation, filtering, heat conduction, amplification, combining, mixing, unidirectional transmission, and isolation; based on the Rigid-Flex PCB / FPC transmission structure, the arrangement, combination, and application of relevant components in the field of quantum computing on the flexible transmission structure are protected; The arrangement, combination, and application include direct soldering and indirect interconnection use. For example, soldering a radio frequency patch attenuator on the flexible board near the inter-board interconnection adapter section belongs to direct soldering, and the multi-channel hermetic connector module is connected to the integrated panel or the measurement and control chassis through an adapter joint and its tail coaxial cable, which belongs to indirect interconnection.

[0015] The present invention discloses a usage method of a flexible transmission system for superconducting quantum computing, including the following steps: S1. Install the sealed cavity on the normal temperature mounting plate, install the multi-channel hermetic connector module according to requirements, and form a vacuum seal through the airtight cover plate; S2. Install the first-stage flexible transmission line board Rigid-Flex PCB / FPC, and adjust its height and bending degree by using a mounting fixture; S3. Connect the upper and lower flexible lines through an inter-board interconnection adapter, and install a radio frequency patch attenuator and an outer shielding cover; S4. Fix the flexible line with heat sinks on both sides at the 10mK plate, and install a high-density coaxial band-pass attenuator group on the MC plate; S5. Connect the integrated panel or the measurement and control chassis through the adapter joint of the multi-channel hermetic connector module and its tail coaxial cable to realize signal transmission.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, through the designed multi-channel radio frequency rigid-flex PCB or flexible printed circuit board, the internal circuit of the FPC can stably operate at a high frequency of up to 10 GHz at various temperatures from normal temperature to low temperature, and has excellent performance such as low insertion loss and return loss. By adjusting the installation height and bending degree of the first-stage flexible transmission line board (Rigid-Flex PCB / FPC), the path length difference is compensated, ensuring that the transmission lengths of all signals are the same, and further ensuring the consistency of the transmission losses of each channel, providing a stable and reliable signal transmission foundation for the superconducting quantum computer.

[0017] In the present invention, based on Rigid-Flex PCB / FPC, during the process of signal transmission from room temperature to the superconducting chip inside the quantum computer, a series of complex functions such as signal transmission, attenuation, heat sink in each low-temperature region, filtering, and signal merging can be completed. For example, a radio frequency patch attenuator is welded to the flexible board near the board-to-board interconnection adapter section, effectively reducing the thermal load on the next temperature disk; the outer shielding cover conducts the heat energy conducted by the upper temperature disk inside the circuit to the shielding cover and transfers it to the temperature disk of this layer through the mounting fixture for absorption, achieving good thermal management.

[0018] In the present invention, by building a flexible transmission system, the problems of space and heat load in the superconducting quantum computer are successfully solved. The sealed cavity can be expanded in the Z-axis direction, and the number of installed multi-channel airtight connector modules can be flexibly adjusted, enabling the optimization of the space layout according to actual needs. At the same time, various structures and components in the system work together, effectively reducing the heat load and increasing the number of qubits of the superconducting quantum computer in the same volume, providing the possibility for realizing large-scale quantum computing.

[0019] In the present invention, Rigid-Flex PCB / FPC is fabricated using ordinary flexible circuit board printing and lamination processes. Compared with solutions such as vapor deposition and electromagnetic sputtering, it has lower cost and higher efficiency. Moreover, the detachable structure of the entire surface of the airtight cover plate and the multi-channel airtight connector module facilitates the installation and fixation of the back flexible transmission line board; the reasonable design and layout of each component in the system reduce the assembly difficulty and improve the stability of the entire system, which is beneficial to large-scale production and application.

[0020] In the present invention, while ensuring the isolation degree between adjacent radio frequency channels, the maximum number of single-board channels is guaranteed by the dense arrangement of radio frequency lines. In the dilution refrigerator, the Z-axis direction of the connection part of each board is stepped and misaligned, maximizing the load utilization rate in three-dimensional space. Since the thickness dimension of the FPC is much smaller than the slot size, the number of transmission line boards that can be installed in a single window is greatly increased, making full use of the limited space resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the flexible transmission system of the present invention; Figure 2 Partial enlarged schematic diagram of the inter-board interconnection adapter of the present invention and its adjacent structure; Figure 3 Schematic diagram of the multi-layer structure of the FPC (flexible printed circuit board) of the present invention; Figure 4 Schematic diagram for comparison of the connection structure between the FPC and the PCB (rigid board) of the present invention.

[0022] In the figure: 101, sealed cavity; 102, airtight cover plate; 103, adapter joint and its coaxial line at the tail; 104, multi-channel airtight connector module; 105, integrated panel; 106, first-section flexible transmission line board Rigid-Flex PCB / FPC; 107, inter-board interconnection adapter; 108, RF patch attenuator; 109, outer shielding cover; 110, mounting fixture; 111, heat sinks on both sides; 301, high-frequency flexible board material; 302, window or slot; 303, via hole for circuit pad; 304, via hole; 305, solder pad and welding part. Detailed implementation manners

[0023] The present invention will be further described below in conjunction with embodiments.

[0024] The following embodiments are used to illustrate the present invention, but cannot be used to limit the protection scope of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention all belong to the scope required to be protected by the present invention.

[0025] Please refer to Figures 1-4 , the present invention provides a flexible transmission system for superconducting quantum computing, including a room-temperature mounting plate, on which a sealed cavity 101 that can be expanded in the Z-axis direction is mounted. A multi-channel airtight connector module 104 is mounted on the sealed cavity 101. The actual number of multi-channel airtight connector modules 104 installed can be adjusted within the range of 1-20 and above. An airtight cover plate 102 that forms a complete vacuum seal is connected to the sealed cavity 101, and the airtight cover plate 102 and the multi-channel airtight connector module 104 are a whole-surface detachable structure; The first-section flexible transmission line board Rigid-Flex PCB / FPC 106 installed through the mounting fixture 110 compensates for the path length difference caused by the installation of the airtight cover plate 102 by adjusting the installation height and the degree of internal and external bending, so that the signal transmission lengths of all channels are kept consistent.

[0026] As Figure 1As shown, the multi-channel airtight connector module 104 is connected to the integrated panel 105 or directly connected to the measurement and control chassis through the adapter joint and its tail coaxial cable 103.

[0027] As Figure 2 shown, it also includes an inter-board interconnection adapter 107. The upper and lower flexible lines are connected through the inter-board interconnection adapter 107. A radio frequency patch attenuator 108 is welded to the flexible board near the inter-board interconnection adapter 107, and the outer shielding cover 109 is closely attached to the radio frequency patch attenuator 108.

[0028] As Figure 1 shown, at the 10mK disk, the flexible line is fixed and conducts heat by being tightly clamped by the two-sided heat sinks 111; at the MC disk, a high-density coaxial bandpass attenuator group is installed along the X-axis and Z-axis.

[0029] As Figure 1 shown, the Rigid-Flex PCB / FPC is fabricated using the printing and lamination processes of ordinary flexible circuit boards. The Rigid-Flex PCB is composed of multi-layer / single-layer FPC and multi-layer / single-layer rigid board PCB. The radio frequency signal is mainly transmitted through the internal circuit structure of the FPC. The common transmission structure in the FPC is the stripline, and it can also use microstrip, coplanar waveguide, rectangular waveguide, and rectangular coaxial structures for transmission. The core board core material of the FPC is the high-frequency flexible board material 301.

[0030] As Figure 4 shown, the high-frequency flexible board material 301 includes MPI and LCP. The copper layer of the FPC is selected from one of pure copper, constantan, nickel copper, manganese copper, and aluminum foil. The PP is the bonding layer for bonding.

[0031] As Figure 4 shown, the rigid board PCB is used for reinforcement, impedance compensation, and heat conduction. The rigid board PCB can be replaced by a metal block. The metal block can increase the external heat conduction performance of the FPC. Windows or slots 302 are provided on the rigid board PCB or the metal block to cooperate with the FPC to achieve local radio frequency impedance compensation. The local radio frequency impedance compensation includes the line pad via 303, via hole 304, solder pad, and welding part 305; Among them, the line pad via 303 corresponds to a specific line connection position, the via hole 304 is used for inter-layer electrical connection, and the solder pad and the welding part 305 are the actual welding operation areas.

[0032] As Figure 1As shown, in the sealed environment composed of the sealed cavity 101, the airtight cover plate 102, and the multi-channel airtight connector module 104, the first-section flexible transmission circuit board Rigid-Flex PCB / FPC 106 is installed and adjusted in height and the degree of internal and external bending through the mounting fixture 110. While ensuring the isolation degree between adjacent radio frequency channels, through the dense arrangement of radio frequency lines, the maximum number of single-board channels is guaranteed. In the dilution refrigerator, the Z-axis direction of the connection parts of each board is stepped and misaligned to maximize the load utilization rate in the three-dimensional space.

[0033] As Figure 1 shown, in addition to the Rigid-Flex PCB / FPC, the transmission component also includes mounting parts for fixing / shielding / heat sinking and radio frequency components for realizing other radio frequency signal functions. On the basis that the first-section flexible transmission circuit board Rigid-Flex PCB / FPC 106 adjusts its height and bending degree through the mounting fixture 110 to compensate for the path length difference, these radio frequency components cooperate with the Rigid-Flex PCB / FPC to realize the signal transmission function; Among them, the radio frequency signal functions include attenuation, filtering, heat conduction, amplification, combining, mixing, unidirectional transmission, and isolation; based on the Rigid-Flex PCB / FPC transmission structure, the arrangement, combination, and application of relevant components in the field of quantum computing on the flexible transmission structure are protected; The arrangement, combination, and application include direct soldering and indirect interconnection. For example, soldering the radio frequency patch attenuator 108 on the flexible board near the inter-board interconnection adapter 107 section belongs to direct soldering, and the multi-channel airtight connector module 104 is connected to the integrated panel 105 or the measurement and control chassis through the adapter joint and its tail coaxial cable 103, which belongs to indirect interconnection.

[0034] The present invention discloses a usage method of a flexible transmission system for superconducting quantum computing, including the following steps: S1. Install the sealed cavity 101 on the normal-temperature mounting plate, install the multi-channel airtight connector module 104 according to requirements, and form a vacuum seal through the airtight cover plate 102; S2. Install the first-section flexible transmission circuit board Rigid-Flex PCB / FPC 106 and adjust its height and bending degree by using the mounting fixture 110; S3. Connect the upper and lower-section flexible lines through the inter-board interconnection adapter 107, and install the radio frequency patch attenuator 108 and the outer shielding cover 109; S4. Fix the flexible line with the two-side heat sink 111 at the 10mK disk, and install a high-density coaxial band-pass attenuator group on the MC disk; S5. Connect the integrated panel 105 or the measurement and control chassis through the adapter joint of the multi-channel airtight connector module 104 and its tail coaxial cable 103 to realize signal transmission.

[0035] The working principle and use process of the present invention: First, the installation process of the system is convenient and efficient. The sealed cavity 101 is installed on the room temperature installation plate, and 1-20 groups or more of multi-channel airtight connector modules 104 are flexibly installed according to actual needs, and then the airtight cover plate 102 is installed to form a vacuum seal. This whole-surface detachable structure facilitates the subsequent installation and fixation of the first section of the flexible transmission circuit board Rigid-Flex PCB / FPC106 on the back, reducing the difficulty of assembly; In the signal transmission link, the first section of the flexible transmission circuit board Rigid-Flex PCB / FPC106 adjusts the installation height and the degree of internal and external bending through the installation fixture 110, effectively compensating for the path length difference caused by the installation of the airtight cover plate 102, making the transmission length of each signal consistent, ensuring the consistency of the transmission loss of each channel, and meeting the strict requirements of the superconducting quantum computer for stable signal transmission. The system can also operate stably under different temperature environments. At the 10mK disk, the flexible line is clamped and fixed by the heat sinks 111 on both sides to conduct heat, reducing the number of RF switching and improving performance; on the MC disk, a high-density coaxial bandpass attenuator group is installed along the X-axis and Z-axis to achieve adaptation and support for more flexible modules and channels. In addition, the system performs well in space and heat load management. The sealed cavity 101 can be expanded in the Z-axis direction, and the number of multi-channel airtight connector modules 104 can be adjusted. Combined with the design of step-displacement in the Z-axis direction of the connection parts of each board in the dilution refrigerator, the load utilization rate in the three-dimensional space is maximized, which greatly increases the number of superconducting quantum computer bits in the same volume. At the same time, the RF patch attenuator 108 welded on the flexible board near the inter-board interconnection adapter 107, in conjunction with the outer shielding cover 109, effectively reduces the heat load on the next temperature disk and optimizes the thermal management of the system. Moreover, the system has powerful signal processing capabilities. In addition to the Rigid-Flex PCB / FPC, the transmission components also work together with the mounting components for fixing / shielding / heat sinking and the RF components that realize other RF signal functions. Based on the first section of the flexible transmission circuit board Rigid-Flex PCB / FPC106, it realizes multiple functions such as attenuation, filtering, heat conduction, amplification, combining, mixing, unidirectional transmission, and isolation, ensuring the accuracy and stability of signal transmission and control of the superconducting quantum computing chip, and fully meeting the complex needs of superconducting quantum computing.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible transmission system for superconducting quantum computing, comprising a room-temperature mounting plate, characterized in that: A seal cavity (101) that can be extended in the Z-axis direction is installed on the normal temperature mounting plate, and a multi-channel airtight connector module (104) is installed on the seal cavity (101). The actual installation number of the multi-channel airtight connector module (104) can be adjusted within the range of 1 - 20 or more, and is connected to the seal cavity (101) to form a complete vacuum-sealed airtight cover plate (102), and the airtight cover plate (102) and the multi-channel airtight connector module (104) are a whole-surface detachable structure. The first-stage flexible transmission line board Rigid-Flex PCB / FPC (106) installed by the installation fixture (110), the first-stage flexible transmission line board Rigid-Flex PCB / FPC (106) compensates for the path length difference caused by the installation of the airtight cover plate (102) by adjusting the installation height and the degree of internal and external bending, so that the signal transmission lengths of all paths are kept consistent.

2. The flexible transmission system for superconducting quantum computing according to claim 1, wherein: The multi-channel airtight connector module (104) is connected to the integrated panel (105) or directly connected to the measurement and control chassis through the adapter joint and its tail coaxial line (103).

3. The flexible transmission system for superconducting quantum computing according to claim 1, characterized in that: It also includes an inter-board interconnection adapter (107), the upper and lower sections of the flexible line are connected through the inter-board interconnection adapter (107), a radio frequency patch attenuator (108) is welded on the flexible board near the inter-board interconnection adapter (107), and the outer shielding cover (109) is closely attached to the radio frequency patch attenuator (108).

4. The flexible transmission system for superconducting quantum computing according to claim 1, characterized in that: At the 10mK disk, the flexible line is fixed and conducts heat by being tightly clamped by the two-side heat sinks (111); at the MC disk, a high-density coaxial band-pass attenuator group is installed along the X-axis and Z-axis directions.

5. A flexible transmission system for superconducting quantum computing according to claim 1, characterized in that: The Rigid-Flex PCB / FPC is manufactured by using the printing and lamination processes of ordinary flexible circuit boards. The Rigid-Flex PCB is composed of multi-layer / single-layer FPC and multi-layer / single-layer rigid board PCB. The radio frequency signal is mainly transmitted through the internal circuit structure of the FPC. The common transmission structure in the FPC is a strip line, and it can also adopt microstrip, coplanar waveguide, rectangular waveguide, and rectangular coaxial structures for transmission. The core board material of the FPC is a high-frequency flexible board material (301).

6. The flexible transmission system for superconducting quantum computing according to claim 5, wherein: The high-frequency flexible board material (301) includes MPI and LCP. The copper layer of the FPC selects one of pure copper, constantan, nickel copper, manganese copper, and aluminum foil, and the PP is an adhesive layer for bonding.

7. A flexible transmission system for superconducting quantum computing according to claim 5, characterized in that: The rigid board PCB is used for reinforcement, impedance compensation, and heat conduction. The rigid board PCB can be replaced by a metal pressing block. The metal pressing block can increase the external heat conduction performance of the FPC. Windows or slots (302) are provided on the rigid board PCB or the metal pressing block to cooperate with the FPC to achieve local radio frequency impedance compensation. The local radio frequency impedance compensation includes line pad vias (303), via holes (304), pads, and welding parts (305). Among them, the line pad vias (303) correspond to specific line connection positions, the via holes (304) are used for inter-layer electrical connection, and the pads and welding parts (305) are the actual welding operation areas.

8. A flexible transmission system for superconducting quantum computing according to claim 1, characterized in that: In a sealed environment composed of a sealed cavity (101), a gas-tight cover plate (102), and a multi-channel airtight connector module (104), the first-stage flexible transmission circuit board Rigid-Flex PCB / FPC (106) is installed and adjusted in height and the degree of internal and external bending through an installation fixture (110). While ensuring the isolation degree between adjacent radio frequency channels, the maximum number of single-board channels is guaranteed through the dense arrangement of radio frequency lines. In a dilution refrigerator, the Z-axis direction of each board connection part is stepped and misaligned to maximize the load utilization rate in three-dimensional space.

9. The flexible transmission system for superconducting quantum computing according to claim 1, characterized in that: In addition to the Rigid-Flex PCB / FPC, the transmission component further includes installation components for fixing / shielding / heat sinking and radio frequency components for realizing other radio frequency signal functions. Based on the adjustment of the height and bending degree of the first-stage flexible transmission circuit board Rigid-Flex PCB / FPC (106) through the installation fixture (110) to compensate for the path length difference, these radio frequency components cooperate with the Rigid-Flex PCB / FPC to realize the signal transmission function; Among them, the radio frequency signal functions include attenuation, filtering, heat conduction, amplification, combining, mixing, unidirectional transmission, and isolation; based on the Rigid-Flex PCB / FPC transmission structure, the arrangement, combination, and application of related components in the field of quantum computing on the flexible transmission structure are protected; The arrangement, combination, and application include direct soldering and indirect interconnection. The soldering of the radio frequency patch attenuator (108) on the flexible board near the inter-board interconnection adapter (107) belongs to direct soldering, and the connection of the multi-channel airtight connector module (104) to the integrated panel (105) or the measurement and control chassis through the adapter joint and its tail coaxial cable (103) belongs to indirect interconnection.

10. A method for using a flexible transmission system for superconducting quantum computing, characterized in that, It includes the following steps: S1. Install the sealed cavity (101) on a normal-temperature mounting plate, install the multi-channel airtight connector module (104) according to requirements, and form a vacuum seal through the gas-tight cover plate (102); S2. Install the first-stage flexible transmission circuit board Rigid-Flex PCB / FPC (106) and adjust its height and bending degree using the installation fixture (110); S3. Connect the upper and lower flexible lines through the inter-board interconnection adapter (107), and install the radio frequency patch attenuator (108) and the outer shielding cover (109); S4. Fix the flexible line with the two-side heat sink (111) at the 10mK plate, and install a high-density coaxial band-pass attenuator group on the MC plate; S5. Connect the integrated panel (105) or the measurement and control chassis through the adapter joint and its tail coaxial cable (103) of the multi-channel airtight connector module (104) to realize signal transmission.

Images