High-density phased array radar antenna cold plate

Abstract

The invention provides a high-density phased array radar antenna cold plate, and relates to the technical field of phased array radar antenna heat dissipation. A cold plate main body of the antenna cold plate is provided with a T / R module slot and a waveguide cavity; waveguide ports communicated with the waveguide cavities are formed in the sides, away from the cold plate body, of the cold plate bosses, the length direction of the cold plate bosses is the same as the length direction of the T / R module slots, the cold plate bosses are arranged in the center area of the cold plate body, and the cold plate bosses can exchange heat with T / R modules arranged in the adjacent T / R module slots. The mode of arranging the cold plate boss can effectively increase the contact area between the cold plate boss and the T / R module arranged in the T / R module slot, and can effectively improve the heat dissipation efficiency of the center of the cold plate main body, thereby improving the temperature uniformity of the cold plate main body. According to the cold plate boss, radio frequency signal transmission can be carried out by arranging the waveguide port, so that the radio frequency signal transmission loss of the antenna module is reduced.

Description

Technical Field

[0001] This specification relates to the field of heat dissipation technology for phased array radar antennas, and more specifically, to a high-density phased array radar antenna cold plate. Background Technology

[0002] A phased array radar antenna refers to a type of radar that changes the beam scanning direction by altering the way the beam emitted from the antenna surface array is synthesized. Its main components include: antenna modules, heat sinks, T / R module modules, power supplies, and array frame. With the increasing integration of phased array antennas, on the one hand, the integrated chips in the antenna modules and the high-power components in the T / R modules generate a large amount of heat in a very small space, with heat dissipation reaching the kilowatt level and exhibiting high heat flux density. On the other hand, high integration means full utilization of space, resulting in a reduction in heat sinks, and each module simultaneously performs different functions. The integrated chips in the antenna modules and the high-power components in the T / R modules are particularly sensitive to temperature; if heat cannot be dissipated in time, it will seriously affect the performance of the phased array antenna. Therefore, thermal design is a critical issue in phased array design.

[0003] Existing heat dissipation methods (such as CN114325590A and CN107732405A) mainly involve changing the combination of microchannel networks and the direction of cooling medium flow. Their ability to enhance the uniformity of cold plate temperature distribution in high heat flux density environments is limited, and they may also suffer from high thermal resistance and small effective contact area. Furthermore, as the integration of phased array antennas increases, the cold plate plays increasingly complex functions, leaving very limited space for arranging flow channels. Existing heat dissipation methods do not consider the issue of cold plate space being occupied by other modules. Summary of the Invention

[0004] The purpose of this specification is to provide a high-density phased array radar antenna cold plate that can overcome the above-mentioned defects of existing heat dissipation methods.

[0005] The embodiments described in this specification are implemented as follows:

[0006] A high-density phased array radar antenna cold plate includes a cold plate body and a cold plate boss disposed on the cold plate body;

[0007] The cold plate body is provided with a T / R module slot and a waveguide cavity, and the T / R module slot and the waveguide cavity are independent of each other;

[0008] The cold plate protrusion has a waveguide port communicating with the waveguide cavity on the side away from the cold plate body. The length direction of the cold plate protrusion is the same as the slot length direction of the T / R module slot. The cold plate protrusion is located at the center of the cold plate body. The cold plate protrusion can exchange heat with the T / R module installed in the adjacent T / R module slot.

[0009] The embodiments described in this specification have at least the following advantages or beneficial effects:

[0010] Compared to existing technologies, this high-density phased array radar antenna cold plate effectively increases the contact area between itself and the T / R module in the T / R module slot by setting cold plate protrusions on the cold plate body, thereby improving heat dissipation. Furthermore, placing the cold plate protrusions in the central region of the cold plate body effectively improves the heat dissipation efficiency at the center of the cold plate body, thus significantly enhancing the temperature uniformity of the cold plate body. In addition, the cold plate protrusions can transmit radio frequency signals through their waveguide ports, reducing the radio frequency signal transmission loss of the antenna module (including the radar antenna cold plate). Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this specification, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this specification and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of the cold plate for the high-density phased array radar antenna provided in this specification.

[0013] Figure 2 This is a schematic diagram showing the location of the liquid cooling channel provided in this manual;

[0014] Icons: 1. Cold plate body; 2. Antenna module wiring channel; 3. Liquid cooling channel; 301. Liquid inlet; 302. Liquid outlet; 4. Antenna connector through hole; 5. T / R module slot; 6. Antenna module mounting through hole; 7. Cold plate boss; 701. Waveguide port; 702. Fixing part; Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments in this specification clearer, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Generally, the components of the embodiments of this specification described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments provided in the accompanying drawings is not intended to limit the scope of the claimed specification, but merely represents selected embodiments of the specification. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without inventive effort are within the scope of protection of this specification.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of the embodiments in this specification, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These are used only for the convenience of describing this specification and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this specification. Furthermore, the terms "first," "second," and "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0019] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In the description of the embodiments in this specification, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0021] Please refer to Figure 1 and Figure 2 The high-density phased array radar antenna cold plate provided in one embodiment of this specification mainly includes a cold plate body 1 and a cold plate boss 7 disposed on the cold plate body 1.

[0022] The cold plate body 1 has a T / R module slot 5 and a waveguide cavity, and the T / R module slot 5 and the waveguide cavity are independent of each other;

[0023] The cold plate protrusion 7 has a waveguide port 701 communicating with the waveguide cavity on the side away from the cold plate body 1. The length direction of the cold plate protrusion 7 is the same as the length direction of the slot of the T / R module slot 5. The cold plate protrusion 7 is located in the central area of ​​the cold plate body 1. The cold plate protrusion 7 can exchange heat with the T / R module installed in the adjacent T / R module slot 5.

[0024] In this embodiment, multiple cold plate protrusions 7 can be arranged in parallel on the cold plate body 1, and each cold plate protrusion 7 is arranged between two adjacent T / R module slots 5 along the slot length direction of the T / R module slot 5, so as to increase the heat dissipation area between the T / R module sidewall and the cold plate protrusion 7, thereby reducing the highest temperature at the center of the antenna array and thus achieving the effect of improving the temperature uniformity of the antenna array.

[0025] Furthermore, the aforementioned cold plate boss 7 is disposed on the upper side wall of the cold plate body 1 (to... Figure 1 The "up" and "down" shown in this embodiment refer to the upper and lower sections, which also facilitates the downward transmission of radio frequency signals from the antenna array.

[0026] In this embodiment, the tolerance value of the T / R module slot 5 is +0.05mm.

[0027] As can be seen, by setting the cold plate protrusion 7 on the cold plate body 1, the above-mentioned antenna cold plate can effectively increase its contact area with the T / R module set in the T / R module slot 5, thereby improving the heat dissipation effect. Moreover, setting the cold plate protrusion 7 in the central area of ​​the cold plate body 1 can effectively improve the heat dissipation efficiency at the center of the cold plate body 1, thereby effectively improving the temperature uniformity of the cold plate body 1. In addition, the cold plate protrusion 7 can transmit radio frequency signals through its waveguide cavity and waveguide port 701, thereby reducing the radio frequency signal transmission loss of the antenna module (including the radar antenna cold plate).

[0028] In this embodiment, a fixing part 702 is provided on the side of the cold plate boss 7 away from the cold plate body 1, and the fixing part 702 can connect the cold plate boss 7 and the T / R module.

[0029] In this embodiment, the fixing part 702 is a fixing through hole, which is provided at both ends of the cold plate boss 7 along its length direction. The cold plate boss 7 and the T / R module can be connected through the fixing through hole to improve the rigidity and strength of the radar antenna cold plate.

[0030] In this embodiment, the cold plate body 1 has an antenna connector through-hole 4 and an antenna module fixing through-hole 6. The antenna connector through-hole 4 is used to install the RF connector of the antenna module, and its size can be determined according to the shape of the actual RF connector used. The tolerance value of the antenna connector through-hole 4 is +0.1mm. The antenna module fixing through-hole 6 is used to fix the antenna module.

[0031] In this embodiment, there are multiple antenna connector through holes 4 and antenna module fixing through holes 6, and the positions of the antenna connector through holes 4 and antenna module fixing through holes 6 can be determined according to the requirements of the antenna array.

[0032] In this embodiment, the cold plate body 1 is also provided with a liquid cooling channel 3. The liquid cooling channel 3 is independent of the antenna connector through hole 4, the antenna module fixing through hole 6 and the T / R module slot 5, and the liquid cooling channel 3 is distributed between the hole walls of the antenna connector through hole 4 and the antenna module fixing through hole 6.

[0033] Considering both the space occupied by other modules within the main body 1 of the cold plate and the application of radar antenna engineering, setting up a liquid cooling channel 3 inside a highly integrated radar antenna can improve the heat dissipation efficiency of the highly integrated antenna array, while not affecting the integration of other modules, thus making it more practical.

[0034] In this embodiment, the distance between the sidewall of the hole in the liquid cooling channel 3 and the sidewall of the through hole in the antenna connector 4 is not less than 1 mm, and the distance between the sidewall of the hole in the liquid cooling channel 3 and the sidewall of the fixing through hole in the antenna module 6 is not less than 1 mm. Specifically, this arrangement avoids the impact on the wall surface caused by excessive fluid pressure within the liquid cooling channel 3.

[0035] In other embodiments, the length direction of the liquid cooling channel is the same as the length direction of the slot in the T / R module slot 5. This arrangement further improves heat dissipation efficiency.

[0036] In this embodiment, the liquid cooling channel 3 can be an S-shaped channel.

[0037] In this embodiment, considering engineering implementation, the length direction of the liquid cooling channel 3 is perpendicular to the slot length direction of the T / R module slot 5.

[0038] Specifically, the main body 1 of the aforementioned cold plate is also provided with a liquid outlet 302 and a liquid inlet 301. The liquid outlet 302 and the liquid inlet 301 are respectively connected to the liquid cooling channel 3. The liquid inlet 301 and the liquid outlet 302 can be connected to an external liquid cooling equipment / device to provide liquid cooling working fluid for heat dissipation.

[0039] In this embodiment, the liquid cooling channel, the T / R module slot 5, and the waveguide cavity are arranged in layers along the height direction of the cold plate body 1. It can be seen that the liquid cooling channel 3 and the T / R module slot 5 are arranged in layers, while the liquid cooling channel 3, the antenna connector through-hole 4, and the antenna module fixing through-hole 6 are arranged in separate sections, which can greatly improve the space utilization of the antenna cold plate.

[0040] In this embodiment, an antenna module wiring groove 2 is provided on the side of the cold plate body 1 away from the cold plate protrusion 7, and the antenna module wiring groove 2 can carry the low-frequency cable of the antenna module. The above arrangement can further improve the space utilization of the antenna cold plate.

[0041] In this embodiment, thermal grease is provided between the slot sidewall of the T / R module slot 5 and the T / R module, which can reduce the thermal resistance between the T / R module and the T / R module slot 5 and improve the heat transfer efficiency.

[0042] In this embodiment, the T / R module slot 5 is equidistant from the antenna module fixing through holes 6 on both sides, and the T / R module slot 5 is equidistant from the antenna connector through holes 4 on both sides.

[0043] In this embodiment, the antenna cold plate can be manufactured by welding or metal 3D printing.

[0044] The above are merely preferred embodiments of this specification and are not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. A cold plate for a high-density phased array radar antenna, characterized in that, It includes a cold plate body and a cold plate boss disposed on the cold plate body; The cold plate body is provided with a T / R module slot and a waveguide cavity, and the T / R module slot and the waveguide cavity are independent of each other; The cold plate protrusion has a waveguide port communicating with the waveguide cavity on the side away from the cold plate body. The length direction of the cold plate protrusion is the same as the slot length direction of the T / R module slot. The cold plate protrusion is located in the central area of ​​the cold plate body. The cold plate protrusion can exchange heat with the T / R module installed in the adjacent T / R module slot.

2. The high-density phased array radar antenna cold plate according to claim 1, characterized in that, A fixing part is provided on the side of the cold plate boss away from the cold plate body, and the fixing part can connect the cold plate boss and the T / R module.

3. The high-density phased array radar antenna cold plate according to claim 1 or 2, characterized in that, The main body of the cold plate has an antenna connector through hole and an antenna module fixing through hole.

4. The high-density phased array radar antenna cold plate according to claim 3, characterized in that, The main body of the cold plate is also provided with a liquid cooling channel. The liquid cooling channel is independent of the antenna connector through hole, the antenna module fixing through hole and the T / R module slot, and the liquid cooling channel is distributed between the hole walls of the antenna connector through hole and the antenna module fixing through hole.

5. The high-density phased array radar antenna cold plate according to claim 4, characterized in that, The distance between the sidewall of the liquid cooling channel hole and the sidewall of the antenna connector through hole is not less than 1mm, and the distance between the sidewall of the liquid cooling channel hole and the sidewall of the antenna module fixing through hole is not less than 1mm.

6. The high-density phased array radar antenna cold plate according to claim 4, characterized in that, The length direction of the liquid cooling channel is the same as the length direction of the slot of the T / R module.

7. The high-density phased array radar antenna cold plate according to claim 4, characterized in that, The liquid cooling channel, the T / R module slot, and the waveguide cavity are arranged in layers along the height direction of the cold plate body.

8. The high-density phased array radar antenna cold plate according to claim 1, characterized in that, An antenna module wiring channel is provided on the side of the cold plate body away from the cold plate boss, and the antenna module wiring channel can carry the low frequency cable of the antenna module.

9. The high-density phased array radar antenna cold plate according to claim 1, characterized in that, Thermal grease is applied between the slot sidewall of the T / R module slot and the T / R module.

10. The high-density phased array radar antenna cold plate according to claim 3, characterized in that, The T / R module slot is equidistant from the mounting holes of the antenna modules on both sides, and the T / R module slot is equidistant from the mounting holes of the antenna connectors on both sides.

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