Infrared filter

Abstract

The utility model discloses an infrared ray filter, comprising an input end, an output end and a filter body, the input end and the output end are SMA joints and are respectively arranged at two ends of the filter body, the filter body comprises an inner conductor, an infrared ray absorbing material, an infrared wave absorbing material and an attenuator, the filter has the beneficial effects that the copper material is adopted, so that the heat of the filter can be quickly transferred out in an extreme low-temperature non-magnetic environment; the selected infrared ray absorbing material is used as a filter medium carrier, the microwave performance of the filter is achieved, meanwhile, infrared rays can be absorbed, and a certain proportion of silicon carbide is introduced into the infrared ray absorbing material to adjust the out-of-band attenuation value of the filter; the attenuators are introduced to the two ends of the filter for matching optimization, so that the port standing wave index of the filter in the microwave frequency band is good, and the effect of filtering environmental noise can be achieved. The infrared filter is easy to produce, assemble and debug and stable in performance.

Description

Technical Field

[0001] This utility model relates to the field of quantum computing technology, and in particular to an infrared filter. Background Technology

[0002] Quantum technology is one of the key areas of contention in the new round of technological revolution and industrial transformation. Quantum computing is an important part of quantum technology, and research progress in this field has been increasing since the construction of quantum computers. Research on quantum computing relies on quantum states on superconducting quantum chips, but these quantum states are susceptible to environmental factors and require cryogenic environments created using dilution refrigerators to maintain their original state.

[0003] Infrared filters are essential components in microwave links. During the operation of the dilution refrigerator, the infrared radiation inside the refrigerator can not only have a great impact on the components, but also cause aluminum to lose its quench and generate a lot of heat, making it impossible for the refrigerator to maintain a low temperature environment of 10mK, and thus unable to guarantee the low temperature environment required for the quantum bits.

[0004] Therefore, an infrared filter is needed to solve the above problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems of the aforementioned infrared filter, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide an infrared filter to solve the problem that "during the operation of the dilution refrigerator, the infrared radiation inside the refrigerator not only has a great impact on the components, but also causes aluminum to lose its quench and generate a lot of heat, making it impossible for the refrigerator to maintain a low temperature environment of 10mK, and thus unable to guarantee the low temperature environment required for the quantum bits".

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an infrared filter, including an input end, an output end, and a filter body;

[0009] The input and output terminals are SMA connectors and are respectively located at both ends of the filter body. The filter body includes an inner conductor, an infrared absorbing material, an infrared absorbing material, and an attenuator. The inner conductor is located inside the filter body and is fixed and supported by the insulating medium inside the filter body. The infrared absorbing material fills the inside of the filter body and is located on the inner side of the infrared absorbing material. The attenuator is located at both ends of the infrared absorbing material.

[0010] In a preferred embodiment of the infrared filter described in this utility model, the inner conductor inside the filter body is made of beryllium bronze.

[0011] In a preferred embodiment of the infrared filter described in this utility model, the insulating medium inside the filter body is made of polytetrafluoroethylene.

[0012] In a preferred embodiment of the infrared filter described in this utility model, the infrared absorbing material is composed of CR124 infrared adhesive.

[0013] In a preferred embodiment of the infrared filter described in this utility model, the infrared absorbing material is composed of a certain proportion of silicon carbide, the proportion of which can be adjusted according to requirements.

[0014] In a preferred embodiment of the infrared filter described in this utility model, the outer shell of the filter body is made of copper.

[0015] In a preferred embodiment of the infrared filter described in this utility model, the SMA connector is made of copper.

[0016] The beneficial effects of this utility model are:

[0017] The copper material used in this application enables the filter to rapidly transfer heat away in an extremely low-temperature, non-magnetic environment of 10 mK. An infrared-absorbing material is selected as the filter's dielectric carrier, which absorbs infrared radiation while achieving microwave performance. A certain proportion of silicon carbide is incorporated into the infrared-absorbing material to adjust the filter's out-of-band attenuation. Attenuators are introduced at both ends of the filter for matching optimization, resulting in good port VSWR performance in the microwave frequency band and effectively filtering out environmental noise. The use of infrared-absorbing material enables the filter to achieve an out-of-band attenuation of 70 dB in the 10 GHz-80 GHz range, protecting the coherent states of the manipulated superconducting qubits from noise interference in quantum computers. This infrared filter is easy to manufacture, assemble, and debug, and exhibits stable performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the structure of an infrared filter according to the present invention.

[0020] Figure descriptions: 1. Input terminal; 2. Output terminal; 3. Filter body; 4. Infrared absorbing material; 5. Insulating medium; 6. Attenuator; 7. Inner conductor; 8. Infrared absorbing material. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0025] This invention addresses the measurement and control link and readout link of a low-temperature superconducting quantum computing system. Its key objective is to effectively absorb and suppress infrared radiation and environmental noise in the measurement and control link, and to rapidly transfer heat to the heat sink of the refrigerator for heat dissipation, ensuring that the measurement and control link operates stably and efficiently at low temperatures.

[0026] Reference Figure 1This invention provides an infrared filter comprising an input terminal 1, an output terminal 2, and a filter body 3. The input terminal 1 and the output terminal 2 are SMA connectors and are respectively disposed at both ends of the filter body 3. The filter body 3 includes an inner conductor 7, an infrared absorbing material 4, an infrared absorbing material 8, and an attenuator 6. The inner conductor 7 is disposed inside the filter body 3 and is fixedly supported by an insulating medium 5 inside the filter body 3. The infrared absorbing material 4 is filled inside the filter body 3 and is disposed inside the infrared absorbing material 8. The attenuator 6 is disposed at both ends of the infrared absorbing material 8. The inner conductor 7 inside the filter body 3 is made of beryllium bronze. The insulating medium 5 inside the filter body 3 is made of polytetrafluoroethylene. The infrared absorbing material 4 is made of CR124 infrared adhesive. The infrared absorbing material 8 is made of silicon carbide in a certain proportion, the proportion of which can be adjusted according to requirements. The outer shell of the filter body 3 is made of copper, and the SMA connector is made of copper.

[0027] The filter body 3 has SMA connectors at both its input terminal 1 and output terminal 2. Input terminal 1 and output terminal 2 are fixedly supported to the inner conductor 7 via an insulating medium 5. Inside the filter body 3, there is an infrared absorbing material 8 doped with a certain proportion of silicon carbide. Infrared absorbing material 4 is fixed within the infrared absorbing material 8 via the insulating medium 5. Attenuators 6 are installed between the two ends of the infrared absorbing material 8 and the SMA connectors, thus forming the entire infrared filter.

[0028] Due to the application of the above technical solution, the present invention has the following advantages:

[0029] The use of copper material allows the filter body 3 to rapidly transfer heat away in an extremely low-temperature, non-magnetic environment of 10mK. The selected infrared absorbing material 4 serves as the dielectric carrier for the filter body 3, achieving microwave performance while also absorbing infrared radiation. A certain proportion of silicon carbide is incorporated into the infrared absorbing material to adjust the out-of-band attenuation of the filter body 3. Attenuators 6 are introduced at both ends of the filter body 3 for matching optimization, resulting in good port VSWR performance in the microwave band and effective filtering of environmental noise. The overall structural design of the infrared filter body 3 meets the requirements of relevant systems and is easy to manufacture, assemble, and debug. Content not described in detail herein is prior art known to those skilled in the art.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An infrared filter, comprising an input end (1), an output end (2) and a filter body (3), characterized in that: the input end (1) and the output end (2) are SMA connectors and are arranged at two ends of the filter body (3) respectively, the filter body (3) comprises an inner conductor (7), an infrared absorbing material (4), an infrared absorbing material (8) and an attenuator (6), the inner conductor (7) is arranged inside the filter body (3) and is fixed and supported by an insulating medium (5) inside the filter body (3), the infrared absorbing material (4) is filled inside the filter body (3), the infrared absorbing material (4) is arranged inside the infrared absorbing material (8), and the attenuator (6) is arranged at two ends of the infrared absorbing material (8).

2. The infrared filter of claim 1, wherein: The inner conductor (7) inside the filter body (3) is composed of beryllium bronze material.

3. The infrared filter of claim 1, wherein: The insulating medium (5) inside the filter body (3) is composed of polytetrafluoroethylene.

4. The infrared filter of claim 1, wherein: The infrared absorbing material (4) is composed of CR124 infrared glue.

5. The infrared filter of claim 1, wherein: The infrared absorbing material (8) is composed of a certain proportion of silicon carbide, and the proportion can be adjusted according to requirements.

6. The infrared filter of claim 1, wherein: The shell of the filter body (3) is composed of copper material.

7. The infrared filter of claim 1, wherein, The SMA connector is composed of copper material.

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