Sealing structure and millimeter wave radar

Abstract

The utility model provides a sealing structure and a millimeter wave radar. The sealing structure comprises a rear shell and an antenna housing. One end, close to the rear shell, of the antenna housing is provided with a first annular groove which is recessed inwards, and the first annular groove is formed by enclosing a first protruding part on the inner side and a second protruding part on the outer side; wedge-shaped clamping blocks are arranged on the inner side wall of the first protruding part at intervals. One end, close to the antenna housing, of the rear shell is provided with a second annular groove which is recessed inwards. The second annular groove is formed by a third protruding part on the inner side and a fourth protruding part on the outer side in a surrounding mode. The wedge-shaped clamping block and the first protruding part are inserted into the second annular groove, the third protruding part is inserted into the first annular groove, an air cavity is reserved between the end of the third protruding part and the bottom of the first annular groove, and sealant is arranged in the air cavity. The wedge-shaped clamping block is inserted into the second annular groove and used for forcing the first protruding part and the fourth protruding part to abut against each other for sealing. The sealing structure and the millimeter wave radar provided by the utility model have good sealing and waterproof performance and are easy to disassemble, assemble and maintain.

Description

Technical Field

[0001] The present application relates to the field of radar technology, and in particular to a sealing structure and a millimeter-wave radar. Background Art

[0002] 4D millimeter-wave radar is a new radar system based on millimeter-wave technology. It transmits and receives millimeter-wave electromagnetic waves to measure four-dimensional information about a target, including distance, speed, horizontal angle, and vertical angle, generating high-density 4D point cloud data. Compared to traditional radar, 4D millimeter-wave radar offers higher resolution, a wider field of view, and a longer detection range, enabling more precise characterization of the target's shape, position, and motion.

[0003] During the development of this application, the inventors discovered that the housings of existing millimeter-wave radar systems often suffer from poor sealing and inconvenient assembly and maintenance. This compromises the stability of the millimeter-wave radar and hinders its use in complex operating scenarios. Even though some millimeter-wave radar systems have excellent housing sealing, the need for additional sealing structures complicates the housing structure. Furthermore, these sealing structures can be difficult to install, resulting in low housing assembly efficiency and impacting overall production efficiency. Summary of the Invention

[0004] Based on this, the present application provides a sealing structure and a millimeter-wave radar to improve the problems of poor sealing and inconvenient disassembly and assembly in the prior art.

[0005] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0006] On the one hand, an embodiment of the present application provides a sealing structure for a millimeter wave radar, comprising a rear shell and a radome covering the rear shell;

[0007] The antenna cover is provided with a first annular groove recessed inwardly at one end close to the rear shell, the first annular groove being surrounded by a first protruding portion on the inner side and a second protruding portion on the outer side; a plurality of wedge-shaped blocks are provided at intervals on the inner side wall of the first protruding portion;

[0008] The rear shell is provided with a second annular groove recessed inwardly at one end close to the antenna cover, and the second annular groove is surrounded by a third protruding portion on the inner side and a fourth protruding portion on the outer side;

[0009] The wedge-shaped block and the first protrusion are both inserted into the second annular groove, the third protrusion is inserted into the first annular groove, and an air cavity is left between the end of the third protrusion and the bottom of the first annular groove, and a sealant is installed in the air cavity; the wedge-shaped block is inserted into the second annular groove to force the first protrusion to abut and seal against the fourth protrusion.

[0010] In one embodiment, the rear shell is a rectangular box structure, including a rear cover and a rear cover side wall arranged around the edge of the rear cover, and the rear cover side wall is provided with the second annular groove at one end close to the antenna cover;

[0011] The antenna cover is a rectangular cover structure, including a front cover and a front cover side wall arranged around the edge of the front cover. The front cover side wall is provided with the first annular groove at one end close to the rear shell, and the height of the front cover side wall is less than the height of the rear cover side wall.

[0012] In one embodiment, at least one wedge-shaped block is provided on each of the four surrounding walls of the first protruding portion of the front cover side wall, and at least four wedge-shaped blocks are provided in total.

[0013] In one embodiment, a wedge-shaped block is provided at least at both ends and in the middle of the side wall in each direction of the first protrusion, and at least three wedge-shaped blocks are provided on the side wall in each direction of the first protrusion.

[0014] In one embodiment, the wedge-shaped block includes a main body and a wedge-shaped portion, and the wedge-shaped portion is arranged at one end close to the rear shell; the wedge-shaped portion is used to avoid the third protrusion, so that the wedge-shaped block can easily enter the second annular groove; the main body is used to squeeze the first protrusion when inserted into the second annular groove.

[0015] In one embodiment, a fixing hole is opened on the back cover of the rear shell, an external connector is installed at the fixing hole, and a sealing ring is provided between the external connector and the rear shell.

[0016] On the other hand, an embodiment of the present application provides a millimeter wave radar, including the sealing structure as described above.

[0017] In one embodiment, a plurality of heat dissipation fins are provided on the outer surface of the rear shell.

[0018] In one embodiment, mounting slots are respectively provided at opposite ends of the outer wall of the rear shell, and a plurality of heat dissipation slots are provided at the bottom of the mounting slots.

[0019] In one embodiment, it also includes a radio frequency substrate assembly, a shielded heat conductive plate and a signal processing substrate assembly which are sequentially arranged in the accommodation space formed by the rear shell and the antenna cover, and the radio frequency substrate assembly is arranged close to the antenna cover, and the radio frequency substrate assembly includes a substrate, a radio frequency chip arranged on the substrate, and a shielding cover covering the radio frequency chip; an avoidance groove is provided on the inner wall of the antenna cover, and the avoidance groove is used to partially accommodate the shielding cover.

[0020] The present application has at least the following beneficial effects: The sealing structure provided by the embodiments of the present application comprises annular grooves (first and second annular grooves) and protrusions (first, second, third, and fourth protrusions) respectively disposed on the housing formed by the back shell and radome. A wedge-shaped block is provided on the sidewall of the first protrusion. When the wedge-shaped block enters the second annular groove, it causes the first protrusion to abut against the fourth protrusion, forming a seal. This allows the sealant in the air cavity between the third protrusion and the first annular groove to function as a seal while preventing it from entering the internal accommodating cavities of the back shell and radome. Assembling the back shell and radome requires only injecting sealant into the air cavity and then inserting the protrusions into the corresponding annular grooves, significantly simplifying the assembly process while ensuring a secure seal. If the back shell and radome need to be disassembled, they can be easily removed by softening the sealant with hot air. The sealing structure of the embodiments of the present application is simple in overall structure, easy to install, and convenient for subsequent assembly and disassembly. The millimeter-wave radar provided in the embodiment of the present application includes the above-mentioned sealing structure, and therefore also has the above-mentioned beneficial effects. Moreover, due to the good sealing performance, it is beneficial for the millimeter-wave radar to broaden the scope of application scenarios, improve working stability, and extend service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front structure of the millimeter-wave radar according to an embodiment of the present application.

[0022] Figure 2 for Figure 1 Schematic diagram of the back structure of the millimeter-wave radar.

[0023] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the millimeter-wave radar.

[0024] Figure 4 This is a schematic diagram of the inner structure of the antenna cover of this application.

[0025] Figure 5 This is a schematic diagram of the inner structure of the rear shell of this application.

[0026] Figure 6 for Figure 3 A magnified schematic diagram of the structure at point A.

[0027] Figure 7 A schematic diagram of the decomposed structure of the millimeter-wave radar according to an embodiment of the present application from one perspective.

[0028] Figure 8 This is a schematic diagram of the decomposition structure of the millimeter wave radar according to an embodiment of the present application from another perspective.

[0029] The meanings of the reference numerals in the accompanying drawings are as follows:

[0030] 1. Radome; 11. Front cover side wall; 111. First protrusion; 112. First annular groove; 113. Second protrusion; 114. Wedge-shaped block; 1141. Main body; 1142. Wedge-shaped portion; 12. Avoidance groove; 13. Front cover;

[0031] 2. Rear housing; 21. Mounting slot; 211. Heat dissipation slot; 22. Horizontal heat dissipation fins; 23. Vertical heat dissipation fins; 24. Fan mounting hole; 25. Second boss; 26. Second heat conduction portion; 27. Rear cover; 271. Process slot; 28. Rear cover sidewall; 281. Third protrusion; 282. Second annular groove; 283. Fourth protrusion; 29. Fixing hole;

[0032] 3. RF substrate assembly; 31. Shielding cover; 32. Second substrate; 33. RF chip; 34. Plug;

[0033] 4. Shielding heat conducting plate; 41. First boss; 42. Via hole; 43. Layering structure; 44. First heat conducting portion;

[0034] 5. Signal processing substrate assembly; 51. Heat conducting layer; 52. First substrate; 53. Inter-board connector socket; 54. Substrate hole; 55. Signal processing chip;

[0035] 6. Sealant;

[0036] 7. External connector; 71. Pin. DETAILED DESCRIPTION

[0037] The technical solution of this application is further elaborated in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit the implementation of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] In the description of this application, it should be understood that the terms "center," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0041] An embodiment of the present application provides a millimeter-wave radar, which may be, for example, a 4D millimeter-wave radar, which can be used in scenarios such as automobiles to assist automobiles in achieving functions such as automatic driving and unmanned driving.

[0042] like Figures 1 to 3 As shown, the millimeter-wave radar of this embodiment includes a sealed structure comprising a connected radome 1 and a rear housing 2. The radome 1 and rear housing 2 are connected to form a storage space for accommodating internal components. The millimeter-wave radar of this embodiment also includes a radio frequency substrate assembly 3, a shielding and heat conducting plate 4, and a signal processing substrate assembly 5, which are sequentially arranged within this storage space. The radio frequency substrate assembly 3 is positioned adjacent to the radome 1.

[0043] like Figure 4 As shown, the antenna cover 1 of this embodiment can be made of a material with good high-frequency millimeter wave transmittance, low price, and easy mold forming, such as PBT (polybutylene terephthalate). The antenna cover 1 of this embodiment is a rectangular cover structure, including a front cover 13 and a front cover side wall 11 arranged around the edge of the front cover 13. The front cover side wall 11 is provided with a first annular groove 112 that is recessed inward at one end close to the rear shell 2. The first annular groove 112 is formed by the inner first protrusion 111 and the outer second protrusion 113 (that is, the first annular groove 112 is opened between the two protrusions). A plurality of wedge-shaped blocks 114 are provided on the inner side wall of the first protrusion 111. For example, a wedge-shaped block 114 can be provided on the inner side wall of the first protrusion 111 of the front cover side wall 11 in four directions, respectively, for a total of four wedge-shaped blocks 114. Preferably, three wedge-shaped blocks 114 can be provided on the inner sidewall of the first protrusion 111 in each direction, with the three wedge-shaped blocks 114 located at both ends and the middle of the inner sidewall. Alternatively, more wedge-shaped blocks 114 can be provided on the inner sidewall of the first protrusion 111 in each direction, with no specific limit on the number. The connection between the front cover 13 and the front cover sidewall 11 of the radome 1 is provided with a step, meaning that the outer wall surface of the front cover sidewall 11 at the end where it connects to the front cover 13 is concave relative to the outer wall surface of the front cover 13. This design ensures that the overall wall thickness of the radome 1 is similar, facilitating the molding of the radome 1 through a mold.

[0044] like Figure 5 As shown, the rear housing 2 of this embodiment has a box-like structure with a rectangular cross-section. To facilitate heat dissipation, the rear housing 2 can be made of a metal material, such as a die-cast aluminum alloy. The rear housing 2 includes a rear cover 27 and a rear cover sidewall 28 surrounding the edge of the rear cover 27. The rear cover sidewall 28 has an inwardly recessed second annular groove 282 at one end near the radome 1. The second annular groove 282 is formed by an inner third protrusion 281 and an outer fourth protrusion 283.

[0045] The height of the front cover sidewall 11 is less than that of the rear cover sidewall 28. The second annular groove 282 is provided corresponding to the first protrusion 111, and the fourth protrusion 283 is provided corresponding to the first annular groove 112. When the radome 1 and the rear shell 2 are assembled, the wedge-shaped block 114 and the first protrusion 111 are inserted into the second annular groove 282, and the third protrusion 281 is inserted into the first annular groove 112. An air cavity is left between the end of the third protrusion 281 and the bottom of the first annular groove 112. The air cavity is filled with sealant 6, which is used to seal and secure the radome 1 and the rear shell 2.

[0046] Specifically, if Figure 4 and Figure 6 As shown, the wedge-shaped block 114 includes a main body 1141 and a wedge-shaped portion 1142. The wedge-shaped portion 1142 is disposed at one end proximal to the rear housing 2. The inclined surface of the wedge-shaped portion 1142 is disposed proximal to the third protrusion 281, configured to avoid the third protrusion 281 when entering the second annular groove 282, thereby facilitating the entry of the wedge-shaped block 114 into the second annular groove 282. The main body 1141 is configured to push against the first protrusion 111 when inserted into the second annular groove 282, thereby forcing the first protrusion 111 into contact with the fourth protrusion 283, thereby closing the gap between the first protrusion 111 and the fourth protrusion 283 (this state is not shown in the figures). For example, when the wedge-shaped portion 1142 enters the second annular groove 282, the main body 1141 also enters the second annular groove 282, pushing the first protrusion 111 toward the fourth protrusion 283, so that a portion of the wall surface of the bottom free end of the first protrusion 111 is close to the fourth protrusion 283, and multiple wedge-shaped blocks 114 push the first protrusion 111 on the corresponding side respectively, so that the circumference of the first protrusion 111 is close to the fourth protrusion 283, forming a circumferential seal to prevent the sealant 6 from entering the second annular groove 282 when filling.

[0047] Sealant 6 is pre-applied to the air cavity. Once the radome 1 and rear housing 2 are snapped together, the sealant 6 is trapped within the air cavity. Once the sealant 6 dries in the shade, it adheres to the radome 1 and rear housing 2, sealing them. When the wedge-shaped block 114 is inserted into the second annular groove 282, it compresses the first protrusion 111, causing it to deform outward and contact the fourth protrusion 283, preventing the sealant 6 from flowing into the device.

[0048] The sealing by the sealant 6 can enhance

[0049] like Figure 5 As shown, the rear shell 2 of this embodiment is provided with a circle of process grooves 271 on the circumferential direction of the inner side of the third protrusion 281. The process grooves 271 are reserved for the rear shell 2 during die-casting. The design of the process grooves 271 is to enable the aluminum alloy die-casting to maintain balanced heat dissipation of various parts during the molding process.

[0050] like Figure 5 and Figure 7 As shown, the rear cover 27 of the rear housing 2 also has a fixing hole 29 for mounting the external connector 7. To ensure the overall sealing and waterproof performance of the device, a sealing ring can be installed between the external connector 7 and the rear housing 2. The external connector 7 is located on the side of the rear housing 2 away from the antenna cover 1 and is fixed to the outer wall of the rear housing 2 using screws and other fasteners. During installation, the external connector 7 is first fixed to the rear housing 2. The pins 71 of the external connector 7 are then inserted through the substrate holes 54 provided in the first substrate 52 and soldered to the first substrate 52 for power and signal transmission.

[0051] like Figure 1 and Figure 8 As shown, mounting slots 21 are provided at opposite ends of the outer surface of the rear housing 2. These slots 21 are used to secure the 4D millimeter-wave radar to its intended location. The bottom of these slots 21 is provided with multiple inwardly recessed heat dissipation grooves 211, which increase the heat dissipation area. In this embodiment, the mounting slots 21 are located at both ends of the rear housing 2 along its length. In some installation environments, the 4D millimeter-wave radar can be conveniently installed by simply snapping the mounting slots 21 onto the user's mounting plate.

[0052] like Figure 2As shown, several heat dissipation fins are also provided on the outer wall of the rear housing 2 to increase the heat dissipation area. The heat dissipation fins include transverse heat dissipation fins 22 and longitudinal heat dissipation fins 23. The transverse heat dissipation fins 22 extend along the width of the rear housing 2. The longitudinal heat dissipation fins 23 are respectively provided near the ends of the rear housing 2 in the longitudinal direction and extend along the length of the rear housing 2. Longitudinal heat dissipation fins 23 are also provided at both ends of the transverse heat dissipation fins 22, further increasing the heat dissipation area of the rear housing 2. The outer wall of the rear housing 2 is also provided with fan mounting holes 24 to facilitate the quick installation of a heat dissipation fan in situations such as equipment testing.

[0053] like Figure 7 and Figure 8 As shown, the RF substrate assembly 3 includes a substrate, an RF chip 33 mounted on the substrate, and a shielding cover 31 covering the RF chip 33. A relief groove 12 is provided on the inner wall of the radome 1 to partially accommodate the shielding cover 31. Specifically, the relief groove 12 is formed by an inward depression in the inner surface of the radome 1. The relief groove 12 can reduce the thickness of the entire radar unit, ensuring that the shielding cover 31 can be installed while ensuring that the distance between the antenna and the radome 1 meets the transmission requirements of electromagnetic waves.

[0054] First bosses 41 are provided at the corresponding locations of the heat-shielding plate 4 and the RF chip 33 and other heating elements. A first heat-conducting portion 44 is provided between the first boss 41 and the RF chip 33. The first heat-conducting portion 44 may be, for example, thermal grease, a thermal pad, or a thermal gel. A protruding bead structure 43 is provided at the corresponding locations of the heat-shielding plate 4 and the thermally conductive layer 51. The bead structure 43 is designed to directly contact the thermally conductive layer 51 and is detachably connected to the first substrate 52 via connectors such as screws.

[0055] The signal processing substrate assembly 5 includes a first substrate 52 and a heat-conducting layer 51 wrapped around the edge of the first substrate 52. The heat-conducting layer 51 is made of a heat-conducting material, such as a layer of copper, or other high-thermal-conductivity material layer that is easy to combine with the first substrate 52. The two ends of the heat-conducting layer 51 are respectively located on the side of the first substrate 52 close to the rear shell 2 and the side close to the shielded heat-conducting plate 4. The middle part connects the two ends so that the heat from one end can be transferred to the other end to facilitate heat conduction. An inter-board connector socket 53 is also welded on the first substrate 52 for transmitting power and signals to the RF substrate assembly 3. A plug 34 is welded at the corresponding position of the second substrate 32 and the inter-board connector socket 53 for plugging into the inter-board connector socket 53. A through hole 42 is provided at the corresponding position of the shielded heat-conducting plate 4 and the inter-board connector socket 53. The plug 34 passes through the through hole 42 and is plugged into the inter-board connector socket 53 to achieve power and signal transmission. The first substrate 52 is fixed on the rear shell 2, and one end of the heat-conducting layer 51 is in direct contact with the rear shell 2, and the other end is in direct contact with the shielding heat-conducting plate 4, so that the heat on the shielding heat-conducting plate 4 can be transferred to the rear shell 2 and then dissipated from the rear shell 2. Figure 8 As shown, a signal processing chip 55 and other heat-generating components are also provided on the first substrate 52. The signal processing chip 55 may be, for example, an FPGA chip. Figure 5 and Figure 7 As shown, second bosses 25 are provided on the inner wall of the back cover 27 of the back shell 2 at positions corresponding to the positions of the signal processing chip 55, and a second heat-conducting part 26 is provided between the second boss 25 and the signal processing chip 55. The second heat-conducting part 26 can be, for example, thermal grease, a thermal gasket or a thermal gel.

[0056] The sealing structure and millimeter-wave radar of the present invention are easy to assemble with their rear housing and radome, while offering excellent sealing and waterproofing. Furthermore, they are also very convenient for assembly, disassembly, and maintenance. While improving the radar's overall waterproofing, they also enhance its heat dissipation through various means, contributing to improved radar performance and operational stability.

[0057] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0058] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A sealing structure for millimeter wave radar, characterized in that: It comprises a rear shell (2) and an antenna cover (1) covering the rear shell (2); The antenna cover (1) is provided with a first annular groove (112) recessed inwardly at one end close to the rear shell (2), the first annular groove (112) being formed by an inner first protrusion (111) and an outer second protrusion (113); a plurality of wedge-shaped blocks (114) are provided at intervals on the inner side wall of the first protrusion (111); An inwardly recessed second annular groove (282) is provided at one end of the rear shell (2) close to the antenna cover (1), and the second annular groove (282) is surrounded by an inner third protrusion (281) and an outer fourth protrusion (283); The wedge-shaped block (114) and the first protrusion (111) are both inserted into the second annular groove (282), the third protrusion (281) is inserted into the first annular groove (112), and an air cavity is left between the end of the third protrusion (281) and the bottom of the first annular groove (112), and a sealant (6) is installed in the air cavity; the wedge-shaped block (114) is inserted into the second annular groove (282) to force the first protrusion (111) and the fourth protrusion (283) to abut and seal.

2. The sealing structure according to claim 1, wherein: The rear shell (2) is a rectangular box structure, comprising a rear cover (27) and a rear cover side wall (28) arranged around the edge of the rear cover (27), and the rear cover side wall (28) is provided with the second annular groove (282) at one end close to the antenna cover (1); The antenna cover (1) is a rectangular cover structure, comprising a front cover (13) and a front cover side wall (11) arranged around the edge of the front cover (13), the front cover side wall (11) is provided with the first annular groove (112) at one end close to the rear shell (2), and the height of the front cover side wall (11) is less than the height of the rear cover side wall (28).

3. The sealing structure according to claim 2, wherein: At least one wedge-shaped clamping block (114) is respectively provided on the four surrounding walls of the first protruding portion (111) of the front cover side wall (11), and at least four wedge-shaped clamping blocks (114) are provided in total.

4. The sealing structure according to claim 3, wherein: A wedge-shaped block (114) is provided at least at both ends and in the middle of the side wall in each direction of the first protruding portion (111), and at least three wedge-shaped blocks (114) are provided on the side wall in each direction of the first protruding portion (111).

5. The sealing structure according to claim 1, wherein: The wedge-shaped clamping block (114) comprises a main body (1141) and a wedge-shaped portion (1142), wherein the wedge-shaped portion (1142) is provided at one end close to the rear shell (2); the wedge-shaped portion (1142) is used to avoid the third protrusion (281), so that the wedge-shaped clamping block (114) can easily enter the second annular groove (282); and the main body (1141) is used to press the first protrusion (111) when inserted into the second annular groove (282).

6. The sealing structure according to claim 2, wherein: A fixing hole (29) is provided on the rear cover (27) of the rear shell (2), an external connector (7) is installed at the fixing hole (29), and a sealing ring is provided between the external connector (7) and the rear shell (2).

7. A millimeter wave radar, characterized in that: Comprising the sealing structure according to any one of claims 1 to 6.

8. The millimeter wave radar according to claim 7, wherein: The outer surface of the rear shell (2) is provided with a plurality of heat dissipation fins.

9. The millimeter wave radar according to claim 7 or 8, characterized in that Mounting slots (21) are respectively provided at opposite ends of the outer wall of the rear shell (2), and a plurality of heat dissipation slots (211) are provided at the bottom of the mounting slots (21).

10. The millimeter wave radar according to claim 7, wherein: The invention also includes a radio frequency substrate assembly (3), a shielding heat conducting plate (4), and a signal processing substrate assembly (5) which are sequentially arranged in a receiving space formed by the rear shell (2) and the antenna cover (1), and the radio frequency substrate assembly (3) is arranged close to the antenna cover (1). The radio frequency substrate assembly (3) includes a substrate, a radio frequency chip (33) arranged on the substrate, and a shielding cover (31) covering the radio frequency chip (33); an avoidance groove (12) is provided on the inner wall of the antenna cover (1), and the avoidance groove (12) is used to partially accommodate the shielding cover (31).

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