Multilayer millimeter wave radar antenna structure capable of reducing internal and external temperature difference

Abstract

The utility model belongs to the technical field of antenna connection, and particularly provides a multilayer millimeter-wave radar antenna structure capable of reducing internal and external temperature difference, which comprises an antenna body, and the antenna body comprises a plurality of layers of antenna units and a cover plate, every two adjacent layers of antenna units are connected through SMT welding, the antenna units and the cover plate are connected through SMT welding, a plurality of grooves are formed in the surfaces of the antenna units, welding areas are formed in the edges of the grooves, a plurality of cavities are formed between every two adjacent layers of antenna units and between the antenna units and the cover plate, and the welding areas are formed in the cavities. And the cavity is communicated with the outside through an air inlet. According to the utility model, through the arrangement of the plurality of grooves, glue reduction can be carried out on the antenna unit, the weight of a product can be reduced, and hot air can better enter the product through the combination of the arrangement of the plurality of cavities and the air inlets, so that the internal and external temperature difference between the surface layer temperature and the internal temperature can be reduced, the voidage can be effectively reduced, and the reliability of the welded product can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna connection, and relates to a multi-layer millimeter wave radar antenna structure capable of reducing the temperature difference between inside and outside. Background Art

[0002] There are the following problems in the SMT welding of the multi-layer millimeter wave radar antenna: a. During welding, the temperature difference between the surface layer and the inside is large, which is likely to cause the central solder area to be unable to melt the solder or easily form voids. If a higher temperature is used, it is likely to cause solder overflow; b. Due to the large temperature difference between the surface layer and the inside, only low-temperature welding materials can be used, which affects the reliability of the product after welding. Content of the Utility Model

[0003] In view of the technical problems in the prior art, the utility model provides a multi-layer millimeter wave radar antenna structure capable of reducing the temperature difference between inside and outside, which includes an antenna body. The antenna body includes multiple layers of antenna units and a cover plate stacked in sequence. The cover plate is installed at the top of the multiple layers of antenna units. The adjacent two layers of antenna units and between the antenna unit and the cover plate are all connected by SMT welding. A plurality of grooves are formed on the surface of the antenna unit, and the edges of the grooves form welding areas. A plurality of cavities are formed between the adjacent two layers of antenna units and between the antenna unit and the cover plate. The cavities are communicated with the outside through air inlets.

[0004] Further, adjacent two cavities are communicated through an air inlet.

[0005] Further, the air inlets for the cavities to communicate with the outside are one or more.

[0006] Further, the multiple cavities are distributed in a dislocation manner with the waveguide.

[0007] Further, the shapes and positions of the adjacent two layers of cavities can be the same or different.

[0008] Beneficial Effects:

[0009] 1. In the utility model, through the arrangement of a plurality of grooves, the glue of the antenna unit can be reduced, thereby reducing the weight of the product. Combined with the arrangement of a plurality of cavities and air inlets, hot air can better enter the interior of the product, thereby reducing the temperature difference between the surface layer and the inside, effectively reducing the void ratio, and improving the reliability of the product after welding.

[0010] 2. In the utility model, through the arrangement that adjacent two cavities are communicated through an air inlet, the flow performance of the hot air can be improved, ensuring the uniformity of the temperature inside the product.

[0011] 3. In the present utility model, the intake port communicating with the outside through the cavity is provided as one or more, which can improve the rate of hot air entering the product interior and accelerate the time to reduce the temperature difference between inside and outside.

[0012] 4. In the present utility model, the misaligned distribution of multiple cavities and the waveguide can avoid affecting the function of the antenna; combined with the setting that the shapes and positions of the cavities in adjacent two layers can be the same or different, it is possible to minimize the glue for the antenna unit according to the actual situation, so that the weight of the product is minimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the disassembled state of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the assembled state of the overall structure of the present utility model.

[0016] Description of the reference numerals:

[0017] 1. Antenna unit; 2. Cover plate; 3. Groove; 4. Welding area; 5. Intake port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the above objects, features and advantages of the present application more obvious and understandable, the following will give a detailed description of the specific embodiments of the present application with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as a limitation to the present application.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0021] In the present application, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0023] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0024] The present utility model provides a multi-layer millimeter-wave radar antenna structure capable of reducing the internal and external temperature difference, as Figure 1 and Figure 2 shown, including an antenna body, the antenna body includes a plurality of antenna units 1 and a cover plate 2 stacked in sequence, and adjacent two layers of antenna units 1 and between the antenna unit 1 and the cover plate 2 are all connected by SMT soldering. A plurality of grooves 3 are formed on the surface of the antenna unit 1, and a welding area 4 is formed at the edge of the groove 3. A plurality of cavities are formed between adjacent two layers of the antenna units 1 and between the antenna unit 1 and the cover plate 2, and the cavities are communicated with the outside through an air inlet 5.

[0025] In this embodiment, through the setting of a plurality of grooves 3, the glue of the antenna unit 1 can be reduced, thereby reducing the weight of the product. Combining the setting of a plurality of cavities and the air inlet 5, hot air can better enter the interior of the product, thereby reducing the internal and external temperature difference between the surface temperature and the internal temperature, effectively reducing the void ratio, and improving the reliability of the product after welding.

[0026] In the present utility model, preferably, as Figure 1 and Figure 2 shown, adjacent two of the cavities are communicated through the air inlet 5.

[0027] In this embodiment, through the setting that adjacent two of the cavities are communicated through the air inlet 5, the flow performance of the hot air can be improved, ensuring the uniformity of the internal temperature of the product.

[0028] In the present utility model, preferably, as Figure 1 shown, the air inlet 5 for the cavity to communicate with the outside is one or more.

[0029] In this embodiment, through the setting that the air inlet 5 for the cavity to communicate with the outside is one or more, the rate of hot air entering the interior of the product can be improved, accelerating the time for reducing the internal and external temperature difference.

[0030] In the present utility model, preferably, as Figure 1 shown, a plurality of the cavities are distributed in a staggered manner with the waveguide; the shapes and positions of adjacent two layers of the cavities can be the same or different.

[0031] In this embodiment, by arranging a plurality of the cavities to be misaligned with the waveguide, the function of the antenna can be prevented from being affected; combined with the setting that the shapes and positions of the adjacent two layers of the cavities can be the same or different, the glue of the antenna unit 1 can be minimized as much as possible according to the actual situation, so that the weight of the product is minimized.

[0032] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0033] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A multi-layer millimeter wave radar antenna structure capable of reducing the temperature difference between inside and outside, comprising an antenna body, the antenna body comprising a plurality of antenna units (1) and a cover plate which are sequentially stacked, the cover plate being mounted on the top of the multi-layer antenna unit (1), two adjacent layers of antenna units (1) and the antenna unit (1) and the cover plate being connected by SMT welding, characterized in that: The surface of the antenna unit (1) is provided with a plurality of grooves (2), the edges of the grooves (2) form welding areas (3), and a plurality of cavities are formed between two adjacent layers of the antenna unit (1) and between the antenna unit (1) and the cover plate, and the cavities are connected to the outside through air inlets (4).

2. A multi-layer millimeter wave radar antenna structure capable of reducing internal and external temperature difference according to claim 1, characterized in that: Two adjacent cavities are connected via an air inlet (4).

3. The multi-layer millimeter wave radar antenna structure capable of reducing the internal and external temperature difference according to claim 2, characterized in that: The cavity is provided with one or more air inlets (4) communicating with the outside.

4. A multi-layer millimeter wave radar antenna structure capable of reducing internal and external temperature differences according to any one of claims 1 to 3, characterized in that: The plurality of cavities and waveguides are distributed in a staggered manner.

5. The multi-layer millimeter wave radar antenna structure capable of reducing the internal and external temperature difference according to claim 4, characterized in that: The shapes and positions of the cavities in two adjacent layers are the same as or different from each other.

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