Antenna System

Abstract

The present application relates to the technical field of SAR antennas, and in particular to an antenna system, comprising a plurality of working equipment groups arranged at intervals along a first direction; any working equipment group comprises a plurality of working equipment, the working equipment is an active equipment or a passive equipment, and the plurality of working equipment is arranged at intervals along a second direction; at least one side of at least some of the working equipment is equipped with a first heating device; in the case where the same working equipment group comprises active equipment and passive equipment, and for the same working equipment group, the total number of first heating devices equipped with all passive equipment is greater than or equal to the total number of first heating devices equipped with all active equipment; for different working equipment groups, the number of first heating devices equipped with a working equipment group containing a larger number of passive equipment is greater than or equal to the number of first heating devices equipped with a working equipment group containing a smaller number of passive equipment. This solution solves the problem of thermal uniformity of SAR antennas.

Description

Technical Field

[0001] The present application relates to the technical field of SAR antennas, and in particular to an antenna system. Background Art

[0002] At present, the planar array SAR antenna is concentrated on the antenna plate. The equipment on the plate is very sensitive to temperature and has high temperature index requirements, so it puts forward high requirements for thermal control. In order to ensure the imaging instructions of the antenna, the temperature of the antenna electronic equipment needs to be controlled within the temperature range of -25℃ to +45℃.

[0003] In order to facilitate transmission, SAR antennas are mostly composed of multiple independent sub-arrays, with the most common number being 4 to 6. During the operation of the SAR antenna, there are both temperature stability requirements and maximum temperature difference requirements between each unit. During operation, the maximum change in the average temperature difference of the corresponding devices between the sub-arrays is ≤5°C; at a certain moment, the maximum temperature difference between a certain unit on the entire array is ≤10°C. It can be seen that how to ensure thermal uniformity is the main problem that SAR antennas need to solve at present. Summary of the invention

[0004] The purpose of the present application is to provide an antenna system, which to a certain extent solves the technical problem existing in the prior art, that is, how to ensure thermal uniformity, which is the main problem to be solved by current SAR antennas.

[0005] The present application provides an antenna system, comprising: a plurality of working device groups, wherein the plurality of working device groups are arranged at intervals along a first direction; any of the working device groups comprises a plurality of working devices, wherein the working devices are active devices or passive devices, and the plurality of working devices are arranged at intervals along a second direction;

[0006] wherein at least one side of at least part of the working equipment is provided with a first heating device;

[0007] In the case where the same working device group includes active devices and passive devices, and for the same working device group, the total number of first heating devices equipped with all the passive devices is greater than or equal to the total number of first heating devices equipped with all the active devices;

[0008] For different working device groups, the number of first heating devices provided for a working device group including a larger number of passive devices is greater than or equal to the number of first heating devices provided for a working device group including a smaller number of passive devices.

[0009] In the above technical solution, further, the multiple working devices included in at least one of the multiple working equipment groups are all active devices, and when the active device is a transmitting / receiving device, the first heating device is arranged between any two adjacent transmitting / receiving devices.

[0010] In any of the above technical solutions, further, the number of the working equipment groups is five, and they are respectively a first working equipment group, a second working equipment group, a third working equipment group, a fourth working equipment group and a fifth working equipment group.

[0011] In any of the above technical solutions, further, all the working devices included in the second working device group are the transmitting / receiving devices;

[0012] All the working devices included in the fourth working device group are the transmitting / receiving devices.

[0013] In any of the above technical solutions, further, the number of working equipment included in the first working equipment group is less than the number of working equipment included in the second working equipment group, and the first working equipment group is not provided with the first heating device;

[0014] The number of working equipment included in the fifth working equipment group is less than the number of working equipment included in the fourth working equipment group, and the fifth working equipment group is not provided with the first heating device;

[0015] The plurality of working devices included in the third working device group include the active device and the passive device.

[0016] In any of the above technical solutions, further, the plurality of working devices included in the third working device group include the active device and the passive device.

[0017] In any of the above technical solutions, further, the antenna system also includes an active mounting plate and an antenna array surface, the plurality of working equipment groups and the first heating device are arranged on one side of the active mounting plate, and the antenna array surface is arranged on the other side of the active mounting plate.

[0018] In any of the above technical solutions, further, the surface of the antenna array is provided with an anodized coating.

[0019] In any of the above technical solutions, further, a second heating device is provided on a side of the antenna array surface close to the active mounting plate.

[0020] In any of the above technical solutions, further, the number of the second heating devices is multiple, and the multiple second heating devices are divided into multiple groups of second heating devices, and each group of second heating devices includes the same number of second heating devices;

[0021] The multiple groups of second heating devices are arranged at equal intervals along the width direction of the antenna array surface, and the multiple second heating devices in each group of second heating devices are arranged at equal intervals along the length direction of the antenna array surface.

[0022] In any of the above technical solutions, further, multiple first heating devices in the same working equipment group are connected to the power supply through the same electrical transmission line.

[0023] Compared with the prior art, the beneficial effects of this application are:

[0024] The antenna system provided in this embodiment performs zoned temperature control on the active mounting plate. Specifically, the working equipment is first arranged in zones. For the working equipment in the same area, that is, in the same working equipment group, the number of first heating devices arranged at the passive equipment is greater than the number of first heating devices arranged at the active equipment, thereby solving the problem of excessive temperature difference between the two.

[0025] In addition, for different areas, that is, different working equipment groups, for the working equipment group containing fewer active devices, that is, the working group containing more passive equipment, more first heating devices are arranged to ensure the temperature uniformity of two different areas. Through the above two aspects of control, the temperature uniformity of the entire antenna is guaranteed.

[0026] It can be seen that in the antenna system provided in this embodiment, the active mounting board performs zoned temperature control, that is, the working equipment is arranged in zones, and the first heating device is arranged in the area with lower temperature, thereby eliminating the influence of the different heat consumption of the active equipment and the passive equipment on the temperature distribution of the active mounting board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the structure of the antenna system provided in an embodiment of the present application at a first viewing angle;

[0029] Figure 2A schematic diagram of the structure of the antenna system provided in an embodiment of the present application at a second viewing angle;

[0030] Figure 3 A schematic diagram of a portion of the structure of the antenna system provided in an embodiment of the present application at a third viewing angle.

[0031] Reference numerals:

[0032] 1-working equipment group, 11-first working equipment group, 12-second working equipment group, 13-third working equipment group, 14-fourth working equipment group, 15-fifth working equipment group, 16-working equipment, 161-active equipment, 162-passive equipment, 2-first heating device, 3-active mounting plate, 4-antenna array surface, 5-second heating device, 6-electric transmission line, a-first direction, b-second direction. DETAILED DESCRIPTION

[0033] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0034] The components of the embodiments of the present application generally described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0035] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Refer to the following Figures 1 to 3 An antenna system according to some embodiments of the present application is described.

[0039] See also Figure 1 As shown, an embodiment of the present application provides an antenna system, comprising: a plurality of working device groups 1, and the plurality of working device groups 1 are arranged at intervals along a first direction a; any working device group 1 comprises a plurality of working devices 16, the working devices 16 are active devices 161 or passive devices 162, and preferably, the plurality of working devices 16 are arranged at intervals along a second direction b perpendicular to the first direction a;

[0040] At least one side of at least part of the working equipment 16 is provided with a first heating device 2;

[0041] In the case where the same working device group 1 includes active devices 161 and passive devices 162, and for the same working device group 1, the total number of first heating devices 2 equipped with all passive devices 162 is greater than or equal to the total number of first heating devices 2 equipped with all active devices 161, and preferably, the number of first heating devices 2 can be increased by arranging first heating devices 2 on opposite sides of the passive device 162;

[0042] For different working equipment groups 1, the number of first heating devices 2 equipped with the working equipment group 1 containing a larger number of passive devices 162 is greater than or equal to the number of first heating devices 2 equipped with the working equipment group 1 containing a smaller number of passive devices 162. Note that the number of passive devices 162 mentioned here is greater than or equal to zero.

[0043] Note: Multiple first heating devices 2 located in the same working equipment group 1 can be connected to a power source through the same electrical transmission line 6. The power source here can be a battery, such as a solar panel, etc., which avoids line confusion and saves space.

[0044] In the antenna system provided in this embodiment, the active mounting plate 3 performs zoned temperature control. Specifically, the working equipment 16 is first arranged in zones. For the working equipment 16 in the same area, that is, in the same working equipment group 1, the number of the first heating devices 2 arranged at the passive equipment 162 is greater than the number of the first heating devices 2 arranged at the active equipment 161, thereby solving the problem of excessive temperature difference between the two.

[0045] In addition, for different areas, that is, for different working equipment groups 1, for the working equipment group 1 containing more active devices 161, that is, for the working group containing fewer passive devices 162, more first heating devices 2 need to be arranged to ensure the temperature uniformity of the two different areas. Through the above two aspects of control, the temperature uniformity of the entire antenna is guaranteed.

[0046] It can be seen that in the antenna system provided in this embodiment, the active mounting board 3 performs zoned temperature control, that is, the working equipment 16 is arranged in zones, and the first heating device 2 is arranged in the area with lower temperature, thereby eliminating the influence of the active device 161 and the passive device 162 on the temperature distribution of the active mounting board 3 due to the different heat consumption.

[0047] Among them, preferably, the first working equipment group 1, i.e., the first working equipment group 11, and the penultimate working equipment group 1, i.e., the fifth working equipment group 15 among the multiple working equipment groups 1 distributed along the first direction a may not be equipped with the first heating device 2, because the number of working equipment 16 included in these two places is relatively small, and the temperature uniformity requirement can be met by relying on the heating of the remaining working equipment groups 1.

[0048] In one embodiment of the present application, preferably, Figure 1 As shown, the multiple working devices 16 included in at least one working device group 1 among the multiple working device groups 1 are all active devices 161, and when the active device 161 is a transmitting / receiving device, a first heating device 2 is provided between any two adjacent transmitting / receiving devices.

[0049] According to the structure described above, since the transmitting / receiving device has a high requirement for thermal uniformity, a first heating device 2 is installed between two adjacent transmitting / receiving devices to ensure uniform temperature distribution in the entire area where the first heating device 2 is located.

[0050] In one embodiment of the present application, preferably, Figure 1 As shown, the number of the working device groups 1 is five, which are respectively a first working device group 11 , a second working device group 12 , a third working device group 13 , a fourth working device group 14 and a fifth working device group 15 .

[0051] Further, preferably, Figure 1As shown, all the working devices 16 included in the second working device group 12 are transmitting / receiving devices.

[0052] According to the structure described above, the working equipment 16 included in the second working equipment group 12 are all transmitting / receiving equipment, so this area has high requirements for thermal uniformity. Therefore, a first heating device 2 is arranged between any two adjacent transmitting / receiving equipment to ensure that the temperature of each transmitting / receiving equipment is the same to ensure the thermal uniformity requirements.

[0053] In one embodiment of the present application, preferably, Figure 1 As shown, all the working devices 16 included in the fourth working device group 14 are transmitting / receiving devices.

[0054] According to the structure described above, all the working equipment 16 included in the fourth working equipment group 14, that is, the second to last working equipment group, are transmitting / receiving devices, and a first heating device 2 is arranged between any two adjacent transmitting / receiving devices to ensure that the temperature of each transmitting / receiving device is the same to ensure the uniformity of heat.

[0055] In one embodiment of the present application, preferably, Figure 1 As shown, the number of working devices 16 included in the first working device group 11 is smaller than the number of working devices 16 included in the second working device group 12 , and the first working device group 11 is not provided with a first heating device 2 .

[0056] According to the structure described above, it can be known that since the second working equipment group 12 is provided with multiple first heating devices 2, while the first heating device 2 heats the working equipment 16 in the second working equipment group 12, the residual heat can also be diffused to the working equipment 16 of the adjacent first working equipment group 11. And it should be noted that the first working equipment group 11 has fewer working equipment 16, so the residual heat of the multiple first heating devices 2 provided in the second working equipment group 12 can fully heat the working equipment 16 of the first working equipment group 11.

[0057] In one embodiment of the present application, preferably, Figure 1 As shown, the number of working devices 16 included in the fifth working device group 15 is smaller than the number of working devices 16 included in the fourth working device group 14 , and the fifth working device group 15 is not provided with the first heating device 2 .

[0058] According to the structure described above, it can be known that since the fourth working equipment group 14 is provided with multiple first heating devices 2, while the first heating devices 2 heat the working equipment 16 in the fourth working equipment group 14, the residual heat can also be diffused to the working equipment 16 of the adjacent fifth working equipment group 15. And it should be noted that the fifth working equipment group 15 has fewer working equipment 16, so the residual heat of the multiple first heating devices 2 provided in the fourth working equipment group 14 can completely heat the working equipment 16 of the fifth working equipment group 15.

[0059] In one embodiment of the present application, preferably, Figure 1 As shown, the plurality of working devices 16 included in the third working device group 13 include active devices 161 and passive devices 162 .

[0060] According to the structure described above, the layout rules of the first heating device 2 in this area, that is, the same group, that is, the third working equipment group 13, are as follows. More first heating devices 2 can be arranged at the passive device 162, and fewer first heating devices 2 can be arranged at the active device 161, or no first heating device 2 can be arranged to ensure the temperature difference between the active device 161 and the passive device 162. It should also be noted that the layout rules of the first heating devices 2 in different areas, that is, different groups, are as follows. Specifically, the number of passive devices 162 included in the third working equipment group 13 is greater than that in the second working equipment group 12 and the third working equipment group 13. Therefore, the number of first heating devices 2 equipped therein must be at least greater than or equal to four to meet the requirements. The four used in this embodiment can meet the requirements, so that the adjacent areas, that is, the working equipment 16 in different groups, maintain temperature uniformity.

[0061] In one embodiment of the present application, preferably, Figure 2 As shown, the antenna system also includes an active mounting plate 3 and an antenna array surface 4. Multiple working equipment groups 1 and a first heating device 2 are arranged on one side of the active mounting plate 3, and the antenna array surface 4 is arranged on the other side of the active mounting plate 3.

[0062] According to the structure described above, it can be seen that the first heating device 2 fully utilizes the empty space formed between two adjacent working devices 16, which is conducive to integration.

[0063] Preferably, the active mounting plate 3 is a square plate, and its length direction is parallel to the first direction a, and its width direction is parallel to the second direction b, and a plurality of working equipment groups 1 are regularly arranged on the square active mounting plate 3 .

[0064] In one embodiment of the present application, preferably, Figure 2 As shown, the surface of the antenna array 4 is provided with an anodic oxidation coating.

[0065] According to the structure described above, the SAR load heating devices in the plurality of working devices 16 transfer heat to the antenna array surface 4 through the active mounting plate 3 by means of heat conduction, and finally radiate heat through the antenna array surface 4 .

[0066] The antenna array surface 4 is used as a heat dissipation surface, and no heat dissipation coating needs to be sprayed on the antenna waveguide surface. Only the anodized coating of the antenna array surface 4 is used, and the absorption-emission ratio of the antenna waveguide surface is adjusted by reasonably designing the ratio of the electrochemical solution, so that the antenna array surface 4 is controlled at a lower basic temperature, and the production process is reduced, thereby reducing the production cost.

[0067] Notice, Figure 2 In the process, the antenna array side absorbs energy from solar radiation, earth reflection and earth infrared.

[0068] In one embodiment of the present application, preferably, Figure 2 and Figure 3 As shown, a second heating device 5 is provided on one side of the antenna array surface 4 close to the active mounting board 3 .

[0069] According to the structure described above, the reasons for setting the second heating device 5 are as follows:

[0070] The antenna subarray area is generally large, and the anodizing treatment needs to be carried out in batches. Due to batch reasons, it is inevitable that the absorption-emission ratios of different subarrays are different. Different absorption-emission ratios between subarrays will cause different radiation heat dissipation capabilities of the subarrays, and then cause different temperatures of the subarrays, and ultimately cause the devices on the active mounting board 3 to work at different starting temperatures. Different starting temperatures aggravate the instability and maximum temperature difference of the temperature between each single unit during the operation of the SAR antenna.

[0071] Therefore, in order to offset the influence caused by the different absorption-emission ratios between antenna subarrays, a heating circuit is arranged on the back of the antenna subarray surface, that is, a second heating device 5 is provided on the side of the antenna surface 4 close to the active mounting plate 3. By controlling the duty cycle of the heating device, the antenna surface 4 is controlled at the same reference temperature, which is then used to offset the different absorption-emission ratios between subarrays caused by process errors, so that each SAR antenna can operate at the same starting temperature.

[0072] Among them, preferably, the waveguide cavity originally existing on the antenna array surface 4 can be used as a space for installing the second heating device 5, so that the second device and the antenna array surface 4 can be assembled more stably without affecting the assembly of the antenna array surface 4 and the active mounting plate 3, and on this basis, further, the second heating device 5 is evenly arranged on the side of the antenna array surface 4 close to the active mounting plate 3.

[0073] Among them, preferably, the antenna system includes multiple groups of second heating devices 5, and the multiple groups of second heating devices 5 are evenly spaced along the width direction of the antenna array surface 4, each group of second heating devices 5 has multiple second heating devices 5, and the multiple second heating devices 5 are evenly spaced along the length direction of the antenna array surface 4, thereby achieving uniform distribution of the second heating devices 5 on the antenna array surface 4, ensuring thermal uniformity, and then controlling the antenna array surface 4 at the same reference temperature, which is further used to offset the different absorption-emission ratios between sub-arrays caused by process errors, so that each SAR antenna unit operates at the same starting temperature.

[0074] In summary, the antenna system has the following structure and advantages:

[0075] The second heating device 5 is arranged on the antenna array surface 4 to offset the influence caused by the different absorption-emission ratios between antenna sub-arrays, so that each SAR antenna can work at the same starting temperature;

[0076] The active mounting board 3 is subjected to zoned temperature control, that is, the working equipment 16 is arranged in zones, and the first heating device 2 is arranged in the area with lower temperature, so as to eliminate the influence of the difference in heat consumption of the active equipment 161 and the passive equipment 162 on the temperature distribution of the active mounting board 3, and jointly ensure that the maximum change of the average temperature difference of the corresponding devices between the sub-arrays during the operation of the SAR load and the maximum temperature difference between a certain type of single machine on the array at a certain moment are within the required range.

[0077] Only the anodized electrochemical coating of the antenna waveguide array surface, that is, the antenna array surface 4, is used for heat dissipation, thereby reducing the time and cost of spraying the thermal control coating.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna system, characterized in that: include: A plurality of working device groups, wherein the plurality of working device groups are arranged at intervals along a first direction; any of the working device groups comprises a plurality of working devices, wherein the working devices are active devices or passive devices, and the plurality of working devices are arranged at intervals along a second direction; wherein at least one side of at least part of the working equipment is provided with a first heating device; In the case where the same working device group includes active devices and passive devices, and for the same working device group, the total number of first heating devices equipped with all the passive devices is greater than or equal to the total number of first heating devices equipped with all the active devices; For different working device groups, the number of first heating devices provided for a working device group including a larger number of passive devices is greater than or equal to the number of first heating devices provided for a working device group including a smaller number of passive devices.

2. The antenna system according to claim 1, characterized in that The multiple working devices included in at least one of the multiple working device groups are all active devices, and when the active devices are transmitting / receiving devices, the first heating device is arranged between any two adjacent transmitting / receiving devices.

3. The antenna system according to claim 2, characterized in that: The number of the working equipment groups is five, which are respectively a first working equipment group, a second working equipment group, a third working equipment group, a fourth working equipment group and a fifth working equipment group.

4. The antenna system according to claim 3, characterized in that All the working devices included in the second working device group are the transmitting / receiving devices; All the working devices included in the fourth working device group are the transmitting / receiving devices.

5. The antenna system according to claim 4, characterized in that: The number of working equipment included in the first working equipment group is less than the number of working equipment included in the second working equipment group, and the first working equipment group is not provided with the first heating device; The number of working equipment included in the fifth working equipment group is less than the number of working equipment included in the fourth working equipment group, and the fifth working equipment group is not provided with the first heating device; The plurality of working devices included in the third working device group include the active device and the passive device.

6. The antenna system according to claim 1, characterized in that The antenna system also includes an active mounting plate and an antenna array surface. The plurality of working equipment groups and the first heating device are arranged on one side of the active mounting plate, and the antenna array surface is arranged on the other side of the active mounting plate.

7. The antenna system according to claim 6, characterized in that: The surface of the antenna array is provided with an anodic oxidation coating.

8. The antenna system according to claim 6, characterized in that A second heating device is provided on one side of the antenna array surface close to the active mounting plate.

9. The antenna system according to claim 8, characterized in that: There are multiple second heating devices, and the multiple second heating devices are divided into multiple groups of second heating devices, and each group of second heating devices includes the same number of second heating devices; The multiple groups of second heating devices are arranged at equal intervals along the width direction of the antenna array surface, and the multiple second heating devices in each group of second heating devices are arranged at equal intervals along the length direction of the antenna array surface.

10. The antenna system according to any one of claims 1 to 9, characterized in that: The plurality of first heating devices in the same working equipment group are connected to a power source via the same electrical transmission line.

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