Liquid metal based radar antenna array non-uniform heat flux density heat dissipation structure

Abstract

The application discloses a liquid metal-based radar antenna array surface non-uniform heat flux density heat dissipation structure, which comprises an antenna array surface, a radiation unit is installed on the front surface of the antenna array surface, a liquid cooling plate is installed on the back surface of the antenna array surface, and a T / R component on the antenna array surface is connected with the liquid cooling plate; a gradient porous structure formed based on a three-period minimal surface is welded at the bottom of the liquid cooling plate, and the liquid cooling plate is sealed with a liquid cooling shell through a sealing element; the liquid cooling shell comprises a liquid inlet channel, a liquid outlet channel and a liquid cooling cavity; and liquid metal is used as a cooling liquid, flows into the liquid inlet channel, exchanges heat with the liquid cooling plate in the liquid cooling cavity, and then flows out through the liquid outlet channel. The liquid metal with high thermal conductivity is used as the cooling liquid, and the gradient porous structure formed based on the three-period minimal surface is combined, so that the problem of the non-uniform heat flux density of the seeker detection radar of a hypersonic aircraft in the flight process is effectively solved, and compared with the conventional gas-liquid two-phase flow heat dissipation, the stability is better, the heat exchange is strengthened, the metal consumption is saved, and the amount of the coolant is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radar antenna array surface heat dissipation, in particular to a radar antenna array surface non-uniform heat flux density heat dissipation structure based on liquid metal. BACKGROUND

[0002] In the field of aerospace, the hypersonic vehicle can fly at a speed of even more than 5 times the speed of sound in the atmosphere. During flight, the protective cover and the air rub violently to produce several hundred or even thousands of degrees Celsius temperature, which may cause the internal electronic equipment performance to change or even be damaged. The traditional protective cover-guide head mode can only improve the heat insulation capacity by increasing the thickness of the protective cover, which will lead to the increase of the transmission loss of the guide head detection radar, and shorten the action distance. The heat dissipation of the guide head detection radar not only needs to consider the heat generated by the transceiver assembly, but also needs to consider the heat transmitted to the radar array surface by the protective cover. The heat flux of the front end of the vehicle is high, and the middle and rear parts are relatively low, which leads to the corresponding change of the heat flux of the radar array surface. Therefore, a radar antenna array surface non-uniform heat flux density heat dissipation structure based on liquid metal is proposed. SUMMARY

[0003] In view of the above technical problems, the present application provides a radar antenna array surface non-uniform heat flux density heat dissipation structure based on liquid metal, which can effectively solve the problem of non-uniform heat flux density of the guide head detection radar of the hypersonic vehicle during flight, and can also ensure the transmission action distance.

[0004] To achieve the above purpose, the technical scheme of the present application is as follows:

[0005] A radar antenna array surface non-uniform heat flux density heat dissipation structure based on liquid metal, comprising:

[0006] An antenna array surface, the front surface of which is provided with a radiation unit, and the back surface of which is provided with a liquid cooling plate, a T / R assembly on the antenna array surface is connected with the upper surface of the liquid cooling plate, and the lower part of the liquid cooling plate is connected with a liquid cooling shell, and the liquid cooling plate is sealed with the liquid cooling shell through a sealing element;

[0007] The liquid cooling shell comprises an inlet channel, a liquid cooling cavity and an outlet channel arranged in sequence along the flow direction of the cooling liquid, wherein a first flow dividing baffle is arranged between the inlet channel and the liquid cooling cavity, and a second flow dividing baffle is arranged between the liquid cooling cavity and the outlet channel;

[0008] A gradient porous structure based on a three-period minimal surface is welded at the bottom of the liquid cooling plate, and the liquid metal as the cooling liquid exchanges heat through the inlet channel, the expansion channel, the first flow dividing baffle, the liquid cooling cavity and the gradient porous structure based on the three-period minimal surface at the bottom of the liquid cooling plate, and then flows out through the second flow dividing baffle, the contraction channel and the outlet channel in sequence;

[0009] The gradient porous structure formed based on the triply periodic minimal surface is a triply periodic minimal surface unit array, comprising a plurality of triply periodic minimal surface units with different bias amounts and being connected to each other, the triply periodic minimal surface unit is formed based on a Gyroid type surface, and an implicit expression of the Gyroid type surface is:

[0010] ;

[0011] wherein a is a size of a unit body, C is a bias constant, r=(x,y,z), x, y and z are coordinate variables in a three-dimensional space;

[0012] The triply periodic minimal surface unit expression is: Φ(r)≤C;

[0013] The gradient porous structure formed based on the triply periodic minimal surface gradually reduces the porosity from the liquid inlet channel to the liquid outlet channel, and gradually increases the heat flux density, and the bias constant changes in the range of -1 to 0;

[0014] wherein the gradient porosity ε satisfies the following linear relationship: ε=-0.328C+0.5, the porosity at the liquid metal cooling liquid inlet is 82.8%, and the porosity at the liquid metal cooling liquid outlet is 50%;

[0015] The bias constant C satisfies the following linear relationship: C=(1 / L)x-1, x is the distance from the bias to the liquid metal cooling liquid inlet, and L is the distance from the liquid metal cooling liquid outlet to the liquid metal cooling liquid inlet;

[0016] The specific surface area of the triply periodic minimal surface unit satisfies the following relationship: S1=2.289C 2 -5.001C+6.102, 1 / mm -1 ;

[0017] The surface area of the triply periodic minimal surface unit satisfies the following relationship: for a G type unit body with a volume of 1*1*1mm 3 , the surface area S2=-0.79C 2 +3.10.

[0018] Beneficial effects: the present application adopts liquid metal with thermal conductivity dozens of times of water as cooling liquid and combines with the gradient porous structure formed based on the three-period minimal surface, the porosity of the gradient porous structure formed based on the three-period minimal surface linearly decreases from the liquid inlet channel to the liquid outlet channel, the heat flow density gradually increases, the porosity is larger at the cooling liquid inlet, the resistance is smaller and the specific surface area is maximized, so that the solid-liquid ratio in the low heat flow area is as small as possible, the metal consumption is greatly saved and the heat dissipation demand near the inlet is met; the cooling liquid temperature is increased at the outlet, the low porosity and the higher specific surface area realize the maximization of the total surface area on the outlet side, so that more heat in the high heat flow area can be taken away in time, and then the uniform temperature control of the radar antenna array surface is realized.

[0019] In addition, the three-period minimal surface unit is formed based on the Gyroid type surface, the porous structure has only one internal flow channel and reduces the difficulty of thickness processing, and is more simple and easy to process.

[0020] The gradient porous structure formed based on the three-period minimal surface adopts the neutral surface bias structure, the gradient change range of the bias amount is-1~0, the high specific surface area of the whole gradient porous structure formed based on the three-period minimal surface can be ensured, the structure heat dissipation is beneficial, and the amount of metal cooling liquid is saved to the greatest extent.

[0021] In an optional embodiment, the T / R components on the antenna array surface are connected with the liquid cooling plate through the boss, and interface material is applied between the T / R components and the boss to reduce the contact thermal resistance.

[0022] Beneficial effects: in the heat dissipation system of the present application, the T / R components are tightly attached to the boss through the interface material, heat is efficiently conducted to the liquid cooling plate. The size of the boss can be flexibly adjusted according to the size of the T / R components and the height of the device, which not only has strong adaptability, but also can effectively reduce the contact thermal resistance, facilitate heat transfer and guarantee the heat dissipation effect.

[0023] In an optional embodiment, the boss and the liquid cooling plate are designed in an integrated manner to reduce the contact thermal resistance.

[0024] In an optional embodiment, the interface material is liquid metal or heat-conducting silicone grease.

[0025] In an optional embodiment, the liquid inlet channel comprises a first straight pipe section and a diameter expansion section connected at the end of the first straight pipe section, the end of the diameter expansion section is connected with one end of the liquid cooling cavity, and the first flow distribution baffle is arranged at the connection between the diameter expansion section and the liquid cooling cavity.

[0026] The liquid outlet channel comprises a diameter reduction section and a second straight pipe section connected at the end of the diameter reduction section, wherein the front end of the diameter reduction section is connected with the other end of the liquid cooling cavity, and the second flow distribution baffle is arranged at the connection between the diameter reduction section and the liquid cooling cavity.

[0027] Beneficial effects: the liquid inlet channel comprises a first straight pipe section and a diameter expansion section connected at the end of the straight pipe section, the cooling liquid is diffused in the diameter expansion section, the flow rate is reduced, the cooling liquid uniformly flows into the liquid cooling cavity through multiple distribution channels on the first distribution baffle, the uniform flow of the cooling liquid into the liquid cooling cavity is ensured, the local cooling liquid flow imbalance is avoided, the heat dissipation of each area of the liquid cooling cavity is balanced, the overall heat dissipation efficiency is improved, and the stable operation of the equipment is ensured.

[0028] The liquid outlet channel comprises a diameter reduction section and a second straight pipe section connected at the end of the diameter reduction section, and the cooling liquid after heat exchange is compressed in the diameter reduction section, and the flow rate is increased, so that the heat is removed in time in the high heat flow area.

[0029] In an optional embodiment, the liquid metal is gallium, gallium-indium alloy or gallium-indium-tin alloy in liquid state at room temperature; and the material of the liquid cooling plate is copper.

[0030] Beneficial effects: the liquid metal is gallium, gallium-indium alloy or gallium-indium-tin alloy in liquid state at room temperature, the thermal conductivity is tens of times that of water, the antenna array surface temperature can be quickly reduced, and the liquid metal has good fluidity and adaptability, can automatically fill small gaps and complex channels, and better adapts to irregular heat dissipation surfaces. Taking the gallium-indium-tin alloy as an example, the melting point can be as low as -19 DEG C, and the boiling point can reach about 1300 DEG C, so that a wide working temperature range is obtained, and different working environments and array heating conditions can be adapted.

[0031] The material of the liquid cooling plate is copper, the high thermal conductivity of the copper material can quickly transfer heat from the liquid cooling plate to the cooling liquid, and the possible corrosion phenomenon is avoided, the service life of the liquid cooling plate is prolonged, and the maintenance cost is reduced.

[0032] In an optional embodiment, the same number of distribution channels are formed on the first distribution baffle and the second distribution baffle, and the number of the distribution channels is an even number not less than 10.

[0033] Compared with the prior art, the radar antenna array surface non-uniform heat flux density heat dissipation structure based on liquid metal of the present application adopts liquid metal with thermal conductivity tens of times that of water as cooling liquid, and combines the gradient porous structure formed based on three-period minimal surface to effectively solve the problem of non-uniform heat flux density of the seeker detection radar of a hypersonic aircraft during flight, and ensure the transmission action distance. Compared with the steam blocking effect and oscillation phenomenon of the gas-liquid two-phase flow heat dissipation, the present application has better stability. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is an explosion view of the radar antenna array surface non-uniform heat flux density heat dissipation structure based on liquid metal of the embodiment of the present application.

[0035] Figure 2 is a schematic view of the side of a liquid cooling plate according to an embodiment of the application;

[0036] Figure 3 is a schematic view of a shunt baffle according to an embodiment of the application;

[0037] Figure 4 is a schematic view of a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to an embodiment of the application;

[0038] Figure 5 is a schematic view of a gradient porous structure based on a Gyroid three-periodic minimal surface according to an embodiment of the application;

[0039] Figure 6 is a graph of the relationship between the parameters of a Gyroid unit and the offset C according to an embodiment of the application.

[0040] Reference signs:

[0041] 1, antenna array; 2, liquid cooling plate; 3, liquid cooling shell; 4, radiating unit; 5, T / R component; 6, boss; 7, gradient porous structure based on a three-periodic minimal surface; 8, sealing element; 9, liquid inlet channel; 10, liquid outlet channel; 11-1, first shunt baffle; 11-2, second shunt baffle; 12, liquid cooling cavity; 13, interface material; 14, Gyroid unit; 15, Gyroid surface. DETAILED DESCRIPTION

[0042] The specific embodiments of the application will be further described below with reference to the accompanying drawings and examples. The following examples are only used to make the technical solutions of the application clearer, and cannot be used to limit the protection scope of the application. All other examples obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the application.

[0043] Example 1

[0044] Referring to Figure 1 , a liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to the application comprises: an antenna array 1, the front surface of the antenna array 1 is provided with a radiating unit 4, the back surface is provided with a liquid cooling plate 2, and a T / R component 5 on the antenna array 1 is connected to the liquid cooling plate 2.

[0045] Referring to Figure 2 , the liquid cooling plate 2 is welded at the bottom with a gradient porous structure 7 based on a Gyroid three-periodic minimal surface, is integrally formed, and the liquid cooling plate 2 realizes sealing with a liquid cooling shell 3 through a sealing element 8.

[0046] Referring to Figure 1 and Figure 4The liquid cooling shell comprises a liquid inlet channel 9, a liquid cooling cavity 12 and a liquid outlet channel 10 arranged in sequence along the flow direction of the cooling liquid, wherein a first flow dividing baffle 11-1 is arranged between the liquid inlet channel 9 and the liquid cooling cavity 12, a second flow dividing baffle 11-2 is arranged between the liquid cooling cavity 12 and the liquid outlet channel 10, and a gradient porous structure 7 formed based on a triply periodic minimal surface is welded at the bottom of the liquid cooling plate 2. The liquid metal as the cooling liquid exchanges heat through the liquid inlet channel 9, the first flow dividing baffle 11, the liquid cooling cavity 12 and the gradient porous structure 7 formed based on the triply periodic minimal surface at the bottom of the liquid cooling plate 2 in sequence, and then flows out through the second flow dividing baffle and the liquid outlet channel 10, thereby taking away the non-uniform heat generated by the protective cover and the T / R module 5.

[0047] Please refer to Figure 2 , Figure 5 and Figure 6 In the embodiment, the gradient porous structure 7 formed based on the triply periodic minimal surface is a triply periodic minimal surface unit array, which comprises a plurality of triply periodic minimal surface units 14 having different biasing amounts and being connected to each other. The triply periodic minimal surface unit 14 is formed based on a Gyroid-type surface 15. Specifically, the implicit expression of the Gyroid-type surface 15 is as follows:

[0048] ;

[0049] Wherein, a is the size of the unit body, C is the biasing constant, and r=(x,y,z) is the coordinate variable in the three-dimensional space.

[0050] Specifically, the expression of the triply periodic minimal surface unit 14 is as follows:

[0051] ;

[0052] The porosity of the gradient porous structure 7 formed based on the triply periodic minimal surface gradually decreases from the liquid inlet channel 9 to the liquid outlet channel 10, and the heat flux density gradually increases. The biasing amount changes in the range of -1 to 0.

[0053] Wherein, the gradient porosity ε satisfies the following linear relationship: ε=-0.328C+0.5. The porosity at the inlet of the liquid metal cooling liquid is 82.8%, and the porosity at the outlet is 50%. The biasing amount C satisfies the following linear relationship: C=(1 / L)x-1, wherein x is the distance from the biasing position to the inlet, and L is the distance from the outlet to the inlet.

[0054] The specific surface area of the triply periodic minimal surface unit 14 satisfies the following relationship: S1=2.289C 2 -5.001C+6.102, 1 / mm -1When C is in [-1, 1], S1 gradually decreases, the specific surface area at the liquid metal cooling liquid inlet is 13.392, 1 / mm -1 , and the specific surface area at the outlet is 6.102, 1 / mm -1 .

[0055] The surface area of the triperiodic minimal surface unit 14 satisfies the following relationship: for a G-type unit body with a volume of 1*1*1 mm 3 , S2=-0.79C+3.10, when C is in [-1, 1], S2 reaches the maximum value at C=0. 2

[0056] As a preferred embodiment of embodiment 1, the liquid metal is gallium, a gallium-indium alloy or a gallium-indium-tin alloy in a liquid state at room temperature.

[0057] The material of the liquid cooling plate 2 is copper.

[0058] In this embodiment, liquid metal with thermal conductivity dozens of times of that of water is used as the cooling liquid, and a gradient porous structure based on a triperiodic minimal surface is combined, the porosity of the gradient porous structure based on the triperiodic minimal surface linearly decreases from the liquid inlet channel to the liquid outlet channel, the heat flux gradually increases, the porosity is large at the cooling liquid inlet, the resistance is small, and the specific surface area is maximized, so that the solid-liquid ratio in the low heat flux area is as small as possible, the metal consumption is greatly saved, and the heat dissipation requirement near the inlet is met; the cooling liquid temperature is high at the outlet, and the low porosity and high specific surface area maximize the total surface area on the outlet side, so that more heat in the high heat flux area can be taken away in time, and thus the uniform temperature control of the radar antenna array surface is realized.

[0059] In addition, the triperiodic minimal surface unit is formed based on a Gyroid-type surface, the porous structure has only one internal flow channel and reduces the difficulty of thickness processing, and is more simple and easy to process.

[0060] The gradient porous structure based on the triperiodic minimal surface adopts a neutral surface bias structure, the gradient change range of the bias amount is -1~0, the high specific surface area of the gradient porous structure based on the triperiodic minimal surface as a whole can be ensured, the structure heat dissipation is facilitated, and the amount of metal cooling liquid is maximally saved.

[0061] Embodiment 2

[0062] The difference between this embodiment and embodiment 1 is that, in the heat dissipation system of the application, in order to make the T / R module efficiently conduct heat to the liquid cooling plate, the T / R module 5 on the antenna array surface 1 is connected with the liquid cooling plate 2 through the boss 6, and the interface material 13 is applied between the T / R module 5 and the boss 6 to reduce the contact thermal resistance.

[0063] ​On the other hand, the boss 6 can be adjusted in size according to the size of the T / R module 5, and the height can be adjusted according to the height of different devices, so it has strong adaptability.

[0064] As a preferred technical solution of embodiment 2, the interface material 13 is a liquid metal or a heat-conducting silicone grease.

[0065] Embodiment 3

[0066] This embodiment is a further optimization of embodiment 2, and the boss 6 is designed in an integrated manner with the liquid cooling plate 2 to reduce the contact thermal resistance.

[0067] Embodiment 4

[0068] The liquid inlet channel 9 includes a first straight pipe section and a diameter expansion section connected to the end of the first straight pipe section, the end of the diameter expansion section is connected to one end of the liquid cooling cavity, and the first flow distribution baffle is arranged at the connection between the diameter expansion section and the liquid cooling cavity.

[0069] The liquid outlet channel 10 includes a diameter reduction section and a second straight pipe section connected to the end of the diameter reduction section, wherein the front end of the diameter reduction section is connected to the other end of the liquid cooling cavity, and the second flow distribution baffle is arranged at the connection between the diameter reduction section and the liquid cooling cavity.

[0070] The liquid inlet channel includes a first straight pipe section and a diameter expansion section connected to the end of the straight pipe section, the cooling liquid is diffused in the diameter expansion section, the flow rate is reduced, the cooling liquid uniformly flows into the liquid cooling cavity through the plurality of flow distribution channels on the first flow distribution baffle, which ensures that the cooling liquid uniformly flows into the liquid cooling cavity, avoids local cooling liquid flow unevenness, balances the heat dissipation of each area of the liquid cooling cavity, improves the overall heat dissipation efficiency, and guarantees stable operation of the equipment.

[0071] The liquid outlet channel includes a diameter reduction section and a second straight pipe section connected to the end of the diameter reduction section, the cooling liquid after heat exchange is compressed in the diameter reduction section, the flow rate is increased, and the heat is timely removed in the high heat flow area.

[0072] Please refer to Figure 3 , the first flow distribution baffle and the second flow distribution baffle are provided with the same number of flow distribution channels, the number of the flow distribution channels is an even number not less than 10, in this embodiment, the first flow distribution baffle and the second flow distribution baffle are respectively provided with 16 branch channels, so that the cooling liquid uniformly flows into the liquid cooling cavity 12.

[0073] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or equipment.

[0074] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure, characterized in that: include: An antenna array surface (1) has a radiation unit (4) mounted on its front side and a liquid cooling plate (2) mounted on its back side, a T / R assembly on the antenna array surface being connected to the upper surface of the liquid cooling plate, a liquid cooling housing (3) being connected to the lower portion of the liquid cooling plate (2), and the liquid cooling plate (2) being sealed to the liquid cooling housing (3) via a sealing member (8); The liquid cooling housing (3) comprises a liquid inlet channel (9), a liquid cooling cavity (12), and a liquid outlet channel (10) sequentially arranged along the flow direction of the cooling liquid, wherein a first diversion baffle is provided between the liquid inlet channel (9) and the liquid cooling cavity, and a second diversion baffle is provided between the liquid cooling cavity and the liquid outlet channel (10); The bottom of the liquid cooling plate (2) is welded with a gradient porous structure (7) formed based on a three-period minimal surface, and the liquid metal as a coolant passes through the liquid inlet channel (9), the first diversion baffle (11), the liquid cooling cavity (12), and the gradient porous structure (7) formed based on a three-period minimal surface at the bottom of the liquid cooling plate (2), and then flows out through the second diversion baffle and the liquid outlet channel (10) in sequence; The gradient porous structure (7) formed based on the three-periodic minimal surface is a three-periodic minimal surface unit array, including a plurality of three-periodic minimal surface units (14) with different offsets and interconnected. The three-periodic minimal surface units (14) are formed based on the Gyroid surface (15). The implicit expression of the Gyroid surface (15) is: ， Among them, a is the size of the unit body, C is the bias constant; The expression of the three-periodic minimal surface unit (14) is: Φ(r)≤C; The porosity of the gradient porous structure (7) formed based on the three-periodic minimal surface gradually decreases from the liquid inlet channel (9) to the liquid outlet channel (10), and the heat flux density gradually increases, and the range of the bias constant is -1 to 0; Among them, the gradient porosity ε satisfies the following linear relationship: ε=-0.328C+0.5, the porosity at the liquid metal coolant inlet is 82.8%, and the porosity at the liquid metal coolant outlet is 50%; The bias constant C satisfies the following linear relationship: C=(1 / L)x-1, where x is the distance from the bias point to the liquid metal coolant inlet, and L is the distance from the liquid metal coolant outlet to the liquid metal coolant inlet; The specific surface area of ​​the three-periodic minimal surface unit (14) satisfies the following relationship: ; The surface area of ​​the three-periodic minimal surface unit (14) satisfies the following relationship: for 1×1×1mm 3 The surface area of ​​the G-type unit volume is S2=-0.79C 2 +3.

10.

2. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The T / R component (5) on the antenna array surface (1) is connected to the liquid cooling plate (2) via a boss (6), and an interface material (13) is applied between the T / R component (5) and the boss (6) to reduce contact thermal resistance.

3. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: In order to reduce the contact thermal resistance, the boss (6) and the liquid cooling plate (2) are designed to be integrated.

4. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 2, characterized in that: The interface material (13) is liquid metal or thermally conductive silicone grease.

5. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The liquid metal is gallium, gallium-indium alloy or gallium-indium-tin alloy that is liquid at room temperature.

6. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The liquid inlet channel (9) comprises a first straight pipe section and an expanded diameter section connected to the end of the first straight pipe section, the end of the expanded diameter section is connected to one end of the liquid cooling chamber, and the first diversion baffle is provided at the connection between the expanded diameter section and the liquid cooling chamber; The liquid outlet channel (10) comprises a reduced diameter section and a second straight pipe section connected to the end of the reduced diameter section, wherein the front end of the reduced diameter section is connected to the other end of the liquid cooling chamber, and the second diversion baffle is provided at the connection between the reduced diameter section and the liquid cooling chamber.

7. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The material of the liquid cooling plate (2) is copper.

8. The liquid metal-based radar antenna array non-uniform heat flux density heat dissipation structure according to claim 1, characterized in that: The first diversion baffle and the second diversion baffle are provided with the same number of diversion channels, and the number of the diversion channels is an even number not less than 10.

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