Antenna system

Abstract

The utility model provides an antenna system, comprising a vacuum chamber assembly comprising a vacuum chamber body with a vacuum pump interface on the side wall; the cold plate is arranged in the vacuum cavity, and the cold plate is used for forming a mounting plane of an antenna; one end of the cold head is connected with the cold plate; the antenna body is arranged on the cold plate; and the refrigerator assembly is connected with the other end of the cold head, and the refrigerator assembly is configured to reduce the temperature of the cold plate. Aiming at a special working environment, the parts of the system are quickly disassembled, the device expansibility is realized, the refrigerating assembly and the vacuum cavity which are indirectly connected can replace a fault assembly on the premise that the vacuum environment in the vacuum cavity is not damaged, and the fault time is shortened; the performance of the antenna can be finely adjusted in real time in the test, and the performance of the antenna is optimized; the system is compact in overall structure and stable in operation, greatly promotes the practical process of the low-temperature antenna, and is good in application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature engineering, in particular to an antenna system suitable for low-temperature environments. Background Art

[0002] The microwave surface resistance of high-temperature superconducting materials is much lower than that of conventional conductors. The superconducting antennas prepared by them have the advantages of high radiation efficiency and high signal-to-noise ratio, and have broad application prospects in the fields of electronic countermeasures, wireless communications, weather radar, radio astronomy, and space technology. At the same time, with the improvement of equipment integration, the size of communication equipment is also required to be smaller and smaller. It is a difficult task to reduce the size of the antenna without reducing the gain and efficiency of the antenna. The emergence of superconducting antennas provides a way to reduce the size of the antenna and improve the performance of the antenna.

[0003] Cryogenic antennas can significantly improve the antenna signal-to-noise ratio, but they need to work in a cryogenic vacuum environment, which requires that the cryogenic antenna test device can provide a low temperature and vacuum environment, and the wave-transmitting window must also have excellent electromagnetic transparency. For example, in the patent for "Liquid nitrogen cooling device for high-temperature superconducting antennas" disclosed in CN93239553.8, the radiation window uses foam material and a double-layer structure to give it excellent electromagnetic transparency. However, the cooling method using liquid nitrogen has poor temperature control ability, complex operation, and poor practicality; the "superconducting filter system with integrated antenna" disclosed in CN201810108256.2 integrates the antenna into the vacuum cavity of the superconducting filter system, which can reduce the volume of the entire system and reduce the complexity of vacuum cavity processing, but it has no scalability and maintenance convenience for special working environments, and the troubleshooting is difficult. It is also impossible to tune and optimize the cryogenic antenna under test in real time, which is not conducive to the testing and improvement of device performance. Utility Model Content

[0004] In order to solve the above technical problems, an embodiment of the utility model provides an antenna system, which is suitable for the field of low-temperature antennas, can provide a low-temperature and vacuum environment for stable operation of low-temperature antennas, can optimize the antenna performance, and tap the ultimate performance of the antenna, so that the actual effect is as close to the design indicators as possible.

[0005] According to the inventive concept of one aspect of the utility model, there is provided an antenna system, comprising:

[0006] Vacuum chamber assembly, including:

[0007] The vacuum chamber body has a vacuum pump interface on its side wall;

[0008] A cold plate, disposed in the vacuum chamber body, the cold plate being used to form a mounting plane for the antenna;

[0009] A cold head, one end of which is connected to the cold plate;

[0010] An antenna body is arranged on the cold plate;

[0011] A refrigerator assembly is connected to the other end of the cold head, and the refrigerator assembly is configured to reduce the temperature of the cold plate.

[0012] According to some embodiments of the present utility model, a first opening is provided on the vacuum chamber body, the first opening is arranged opposite to the cold head, and a first flange is provided on the first opening;

[0013] The vacuum chamber assembly further comprises:

[0014] First quick release flange interface;

[0015] A connecting flange connected to the first quick-release flange interface;

[0016] A bellows, two ends of which are respectively connected to the first quick-release flange interface and the cold head to form a seal between the cold head and the first opening;

[0017] The refrigerator assembly comprises:

[0018] A cold finger passes through the bellows and abuts against the cold head;

[0019] The second quick-release flange interface is quickly connected and disassembled with the first quick-release flange interface through a clamp.

[0020] According to some embodiments of the present utility model, a second opening is provided on the vacuum chamber body, and the vacuum chamber assembly further comprises:

[0021] A wave-transparent cover is arranged on the second opening, and the wave-transparent cover is made of a material with good electromagnetic transparency;

[0022] Wherein, the front side of the antenna body faces the wave-transmitting cover.

[0023] According to some embodiments of the present invention, a third opening is provided on the vacuum chamber body at a position opposite to the second opening, the antenna body is perpendicular to the mounting plane, and the vacuum chamber assembly further includes:

[0024] a first blind flange, disposed on the third opening;

[0025] The antenna system further comprises:

[0026] An antenna feeding network is connected to the antenna body, and the antenna feeding network is parallel to the first blind plate flange.

[0027] According to some embodiments of the present invention, the antenna system further includes:

[0028] A low noise amplifier is mounted on the cold plate, and the low noise amplifier is connected to the antenna body.

[0029] According to some embodiments of the present invention, the refrigerator assembly comprises:

[0030] A box body, the cold finger is arranged on the outer surface of the box body, the box body is provided with a heat dissipation component of a refrigerator component, and a vent is opened on the side of the box body;

[0031] A heat dissipation fan is arranged in the box body, and the heat dissipation fan is used to cool the heat dissipation component.

[0032] According to some embodiments of the present invention, the wave-transparent cover is sealed to the second opening via a vacuum O-ring and an indium ring.

[0033] According to some embodiments of the present utility model, a fourth opening is provided on the vacuum chamber body at a position opposite to the mounting plane, and a second blind flange is provided on the fourth opening;

[0034] The antenna system further comprises:

[0035] A microwave connector is arranged on the inner side of the second blind flange, and the microwave connector is connected to the antenna body through a coaxial line.

[0036] According to some embodiments of the present invention, the antenna system further includes:

[0037] A connector is arranged on the inner side of the second blind flange, and the connector is connected to the microwave connector and the antenna body through a cable.

[0038] According to some embodiments of the present invention, the inner wall of the vacuum chamber body is coated with a wave-absorbing coating to reduce the influence of reflected waves on the antenna.

[0039] The antenna system according to the embodiment of the utility model can provide a good working environment for the normal operation of the cryogenic antenna. The modular design and quick detachable connection greatly shorten the failure time. The antenna can be tuned in real time during the test. The overall structure of the system is compact and the operation is stable, which greatly promotes the practical application process of the cryogenic antenna and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0041] Figure 1 is a perspective view of an antenna system according to an exemplary embodiment of the present invention;

[0042] Figure 2 is a cross-sectional view of an antenna system according to an exemplary embodiment of the present utility model;

[0043] Figure 3 is a cross-sectional view of an antenna system according to an exemplary embodiment of the present invention at another angle.

[0044] In the above drawings, the meanings of the reference numerals are as follows:

[0045] 1- Antenna body;

[0046] 2-Low noise amplifier 2;

[0047] 3- Vacuum chamber assembly;

[0048] 31-connector;

[0049] 32-microwave connector;

[0050] 33-second blind flange;

[0051] 34-upper flange;

[0052] 35-front flange;

[0053] 36-wave-transparent cover;

[0054] 37-rear flange;

[0055] 38-first blind flange;

[0056] 39-cold plate;

[0057] 310-cold head;

[0058] 311- bellows;

[0059] 312-lower flange;

[0060] 313-first quick-release flange interface;

[0061] 314-connecting flange;

[0062] 315-vacuum pump interface;

[0063] 4-Refrigerator assembly;

[0064] 41-clamp;

[0065] 42-Refrigerator;

[0066] 43- box body;

[0067] 44- cooling fan;

[0068] 45-power supply;

[0069] 46-Refrigerator controller. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0071] However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, the description of the known technology is omitted to avoid unnecessary confusion of the concept of the present invention.

[0072] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The term "comprising" used herein indicates the existence of features, steps, operations, but does not exclude the existence or addition of one or more other features.

[0073] In the case of using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0074] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0075] Figure 1 is a perspective view of an antenna system according to an exemplary embodiment of the present invention; Figure 2 is a cross-sectional view of an antenna system according to an exemplary embodiment of the present utility model; Figure 3 is a cross-sectional view of an antenna system according to an exemplary embodiment of the present invention at another angle.

[0076] According to the inventive concept of one aspect of the utility model, an antenna system is provided, such as Figures 1 to 3 As shown, it includes: a vacuum chamber assembly 3, an antenna body 1 and a refrigerator assembly 4. The vacuum chamber assembly 3 includes: a vacuum chamber body, a cold plate 39 and a cold head 310. A vacuum pump interface 315 is provided on the side wall of the vacuum chamber body; the cold plate 39 is arranged in the vacuum chamber body, and the cold plate 39 is used to form a mounting plane for the antenna; one end of the cold head 310 is connected to the cold plate 39. The antenna body 1 is arranged on the cold plate 39. The refrigerator assembly 4 is connected to the other end of the cold head 310, and the refrigerator assembly 4 is configured to reduce the temperature of the cold plate 39.

[0077] In this embodiment, a vacuum and low-temperature sealed place is provided by the vacuum chamber assembly 3, thereby providing a good working environment for the normal operation of the cryogenic antenna. The modular design and quick detachable connection greatly shorten the failure time, and the antenna can be tuned in real time during the test. The overall structure of the system is compact and the operation is stable, which greatly promotes the practical application process of the cryogenic antenna and has a good application prospect.

[0078] According to some embodiments of the present invention, one or more mounting holes are provided on the cold plate 39, and the antenna body 1 is fixed on the cold plate 39 through the mounting holes. Optionally, the antenna body 1 and the cold plate 39 are screwed or riveted.

[0079] According to some embodiments of the utility model, a first opening is provided on the vacuum chamber body, the first opening is arranged opposite to the cold head 310, and a first flange is provided on the first opening. The vacuum chamber assembly 3 also includes a first quick-release flange interface 313, a connecting flange 314 and a bellows 311. The first quick-release flange interface 313 can be a KF50 interface flange. The connecting flange 314 is connected to the first quick-release flange interface 313. The two ends of the bellows 311 are respectively connected to the first quick-release flange interface 313 and the cold head 310 to form a seal between the cold head 310 and the first opening. The refrigerator assembly 4 includes a cold finger and a second quick-release flange interface. The cold finger passes through the bellows 311 and abuts against the cold head 310. The second quick-release flange interface and the first quick-release flange interface 313 are quickly connected and disassembled through a clamp 41.

[0080] According to some embodiments of the utility model, before the performance test of the low-temperature antenna system is performed, first, the antenna body 1 is fixed on the cold plate 39 and connected to the low-noise amplifier 2 and the microwave connector 32. Secondly, the second blind flange 33 is covered on the upper flange 34 and fastened with bolts, and the vacuum chamber assembly 3 forms an accommodating space. At this time, the front of the antenna body 1 faces the wave-transparent cover 36, and the back of the antenna body 1 faces the first blind flange 38. Subsequently, the vacuum chamber assembly 3 is plugged into the cold finger of the refrigerator 42, the vacuum pump interface 315 is connected to the vacuum pump, the vacuum pump is turned on, and the vacuum chamber body enters a vacuum environment. After the vacuum requirement is met, the refrigerator 42 is turned on, and the cold plate 39 begins to cool down. After a period of time (about one hour), the temperature of the antenna body 1 drops to the working temperature. Finally, the device is powered, and the low-temperature antenna system starts to work.

[0081] According to some embodiments of the utility model, when it is necessary to quickly replace a part, turn off the power supply 45 of the refrigeration assembly, open the clamp 41 (for example, KF50 clamp), separate the first quick-release flange interface 313 (for example, KF50 interface) and the second quick-release flange interface of the refrigerator 42, and pull out the cold finger of the refrigerator 42 inserted into the accommodation space formed by the cold head 310, the connecting flange 314, the quick-release flange interface, the clamp 41 and the bellows 311. At this time, the vacuum chamber is not connected to the outside world, which is convenient for replacing the faulty part. After the replacement is completed, align the first quick-release flange interface 313 and the second quick-release flange interface, insert the cold finger back into the accommodation space, fix the clamp 41, and the replacement is completed.

[0082] According to some optional embodiments of the utility model, the vacuum chamber body is a cylindrical structure. Optionally, the outer dimensions of the vacuum chamber body can be length: 160mm, inner diameter: 100mm, outer diameter: 104.4mm; the outer dimensions of the second blind flange 33 and the first blind flange 38 can be diameter: 108mm, height: 5mm; the flange outer dimensions of the wave-transparent cover 36 can be outer diameter: 138mm, inner diameter: 100mm, hemispherical diameter of the wave-transparent cover 36: 100mm.

[0083] According to some optional embodiments of the present invention, the antenna body 1 has various sizes and types, and the antenna body 1 is detachably connected to the cold plate 39. Different types of antenna bodies 1 are adapted to different low temperature and vacuum environment requirements.

[0084] According to some optional embodiments of the present invention, the materials of the cold head 310 and the cold plate 39 are both metals with high thermal conductivity, such as copper.

[0085] According to some optional embodiments of the present invention, the material of the vacuum chamber body is 304 stainless steel. Further optionally, the material of the first blind flange 38, the second blind flange 33, the upper flange 34, the lower flange 312, the front flange 35, the rear flange 37, the interface, the clamp 41 and other parts is the same as the material of the vacuum chamber body, which is 304 stainless steel to ensure the reliability of the system.

[0086] According to some embodiments of the utility model, a second opening is provided on the vacuum chamber body, and the vacuum chamber assembly 3 also includes a wave-transparent cover 36, which is arranged on the second opening and is made of a material with good electromagnetic transparency; wherein the front side of the antenna body 1 faces the wave-transparent cover 36.

[0087] According to some embodiments of the utility model, a third opening is provided on the vacuum chamber body at a position opposite to the second opening, and the antenna body 1 is perpendicular to the mounting plane. The vacuum chamber assembly 3 further includes a first blind flange 38, which is disposed on the third opening. The antenna system further includes an antenna feeding network, which is linked to the antenna body 1, and the antenna feeding network is parallel to the first blind flange 38.

[0088] According to some embodiments of the present invention, the antenna system further includes a low noise amplifier 2 . The low noise amplifier 2 is mounted on the cold plate 39 , and the low noise amplifier 2 is connected to the antenna body 1 .

[0089] According to some embodiments of the utility model, the refrigerator assembly 4 includes a box body 43 and a cooling fan 44, the cold finger is arranged on the outer surface of the box body 43, the box body 43 is provided with a cooling assembly of the refrigerator assembly 4, and a ventilation hole is opened on the side of the box body 43; the cooling fan 44 is arranged in the box body 43, and the cooling fan 44 is used to cool the cooling assembly.

[0090] According to some optional embodiments of the present invention, the refrigerator 42 is a 30W high-performance hybrid pulse tube cryogenic refrigerator 42 .

[0091] According to some embodiments of the present invention, the wave-transparent cover 36 is sealed to the second opening via a vacuum O-ring and an indium ring.

[0092] According to some embodiments of the present invention, the wave-transparent cover 36 is installed at the front end of the vacuum chamber assembly 3, and can also be installed at the rear end of the vacuum chamber assembly 3 as needed.

[0093] According to some embodiments of the present invention, a fourth opening is provided on the vacuum chamber body at a position opposite to the mounting plane, and a second blind flange 33 is provided on the fourth opening. The antenna system further includes a microwave connector 32, which is provided on the inner side of the second blind flange 33 and connected to the antenna body 1 via a coaxial line.

[0094] According to some optional embodiments of the present invention, the microwave connector 32 may be an SMA connector 31 .

[0095] According to some embodiments of the present invention, the antenna system further includes a connector 31 , which is disposed on the inner side of the second blind flange 33 , and the connector 31 is connected to the microwave connector 32 and the antenna body 1 through a cable.

[0096] According to some embodiments of the present invention, the inner wall of the vacuum chamber body is coated with a wave-absorbing coating to reduce the influence of reflected waves on the antenna.

[0097] According to some embodiments of the present invention, the box body 43 of the refrigeration assembly 4 includes four side panels and a bottom panel, a fan mounting seat is inserted on the side, a power supply mounting seat and a controller mounting seat are inserted on the bottom, and a through hole is provided in the mounting seat, and the cooling fan 44, the power supply 45 and the refrigerator controller 46 are respectively inserted in the corresponding through holes.

[0098] So far, the embodiments of the utility model have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each component are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0099] It should also be noted that, in the specific embodiments of the present invention, unless otherwise indicated, the numerical parameters in the specification and the appended claims are approximate values ​​and can be changed according to the desired characteristics obtained through the content of the present invention. Specifically, all numbers used in the specification and claims to indicate the size, range conditions, etc. of the composition should be understood to be modified by the term "about" in all cases. In general, the meaning of the expression refers to the change of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments by a specific number.

[0100] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0101] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An antenna system, characterized in that: include: Vacuum chamber assembly, including: The vacuum chamber body has a vacuum pump interface on its side wall; A cold plate, disposed in the vacuum chamber body, the cold plate being used to form a mounting plane for the antenna; A cold head, one end of which is connected to the cold plate; An antenna body is arranged on the cold plate; A refrigerator assembly is connected to the other end of the cold head, and the refrigerator assembly is configured to reduce the temperature of the cold plate.

2. The antenna system according to claim 1, characterized in that The vacuum chamber body is provided with a first opening, the first opening is arranged opposite to the cold head, and the first opening is provided with a first flange; The vacuum chamber assembly further comprises: First quick release flange interface; A connecting flange connected to the first quick-release flange interface; A bellows, two ends of which are respectively connected to the first quick-release flange interface and the cold head to form a seal between the cold head and the first opening; The refrigerator assembly comprises: A cold finger passes through the bellows and abuts against the cold head; The second quick-release flange interface is quickly connected and disassembled with the first quick-release flange interface through a clamp.

3. The antenna system according to claim 1, characterized in that The vacuum chamber body is provided with a second opening, and the vacuum chamber assembly further comprises: A wave-transparent cover is arranged on the second opening, and the wave-transparent cover is made of a material with good electromagnetic transparency; Wherein, the front side of the antenna body faces the wave-transmitting cover.

4. The antenna system according to claim 3, characterized in that A third opening is provided on the vacuum chamber body at a position opposite to the second opening, the antenna body is perpendicular to the mounting plane, and the vacuum chamber assembly further comprises: a first blind flange, disposed on the third opening; The antenna system further comprises: An antenna feeding network is connected to the antenna body, and the antenna feeding network is parallel to the first blind plate flange.

5. The antenna system according to claim 4, characterized in that: The antenna system further comprises: A low noise amplifier is mounted on the cold plate, and the low noise amplifier is connected to the antenna body.

6. The antenna system according to claim 2, characterized in that The refrigerator assembly comprises: A box body, the cold finger is arranged on the outer surface of the box body, the box body is provided with a heat dissipation component of a refrigerator component, and a vent is opened on the side of the box body; A heat dissipation fan is arranged in the box body, and the heat dissipation fan is used to cool the heat dissipation component.

7. The antenna system according to claim 3, characterized in that: The wave-transparent cover is sealed and connected to the second opening via a vacuum O-ring and an indium ring.

8. The antenna system according to claim 3, characterized in that: A fourth opening is provided on the vacuum chamber body at a position opposite to the mounting plane, and a second blind flange is provided on the fourth opening; The antenna system further comprises: A microwave connector is arranged on the second blind flange, and the microwave connector is connected to the antenna body through a coaxial line.

9. The antenna system according to claim 8, characterized in that: The antenna system further comprises: A connector is arranged on the second blind flange, and the connector is connected to the microwave connector and the antenna body through a cable.

10. The antenna system according to claim 1, characterized in that The inner wall of the vacuum chamber body is coated with a wave absorbing coating to reduce the influence of reflected waves on the antenna.

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