Antennas and automobiles

Abstract

The application discloses an antenna and a car, comprising an antenna main body. The antenna main body comprises a first branch, a second branch, a third branch, a seventh branch, an eighth branch, a tenth branch and an eleventh branch located in a first plane, and a connecting part, a fourth branch, a fifth branch, a sixth branch, a ninth branch and a twelfth branch located in a second plane, wherein the first plane is perpendicular to the second plane. Through the layout of each branch of the antenna, the antenna has good working performance in a limited space. The antenna can excite multiple resonance frequency points, and the compact layout can meet the performance requirements of the antenna in the limited space.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more particularly to an antenna and an automobile. Background Technology

[0002] With the development of vehicle-to-everything (V2X) technology, vehicle antennas provide strong support for intelligent transportation in terms of communication, navigation, and entertainment. Vehicle antennas, based on requirements such as high temperature resistance and robustness, are typically designed for all-metal environments. Furthermore, they need to operate at different frequency bands (LTE antennas) to achieve intelligent communication. However, most current all-metal vehicle antennas have complex structures, occupy a large amount of space, and suffer from poor bandwidth and gain within limited space. Summary of the Invention

[0003] This application aims to provide an antenna that improves antenna efficiency within a limited space.

[0004] In a first aspect, this application proposes an antenna, including an antenna body. The antenna body includes a first segment, a second segment, a third segment, a seventh segment, an eighth segment, a tenth segment, and an eleventh segment located on a first plane, and a connecting portion, a fourth segment, a fifth segment, a sixth segment, a ninth segment, and a twelfth segment located on a second plane, wherein the first plane is perpendicular to the second plane. The first segment and the second segment are disposed opposite to each other along a first direction, and the third segment is connected between the first segment and the second segment. The connecting portion includes a first part and a second part, wherein the first part is connected to the first segment, and the fourth segment is connected to the second segment, and the first part and the fourth segment are disposed opposite to each other along the first direction. The fifth segment is connected to the fourth segment and extends toward the second part; the sixth segment is connected to the second part and extends toward the fifth segment, and a first gap exists between the fifth segment and the sixth segment. The seventh segment and the eighth segment are both disposed between the first segment and the second segment, and the seventh segment and the eighth segment are disposed opposite to each other along the first direction. The ninth branch is disposed between the first portion and the fourth branch, with one end connected to the seventh branch and the other end connected to the eighth branch, and the ninth branch is also connected to the second portion. The tenth branch is connected to the end of the seventh branch furthest from the ninth branch, and extends toward the eighth branch. The eleventh branch is connected to the end of the eighth branch furthest from the sixth branch, extends toward the seventh branch, and has a second gap with the tenth branch. The twelfth branch is connected to the end of the ninth branch furthest from the fourth branch, and extends toward the second portion.

[0005] In the above technical solution, by arranging the layout of each branch of the antenna, the antenna can achieve good operating performance within a limited space. Specifically, the connecting parts can be grounded to form a grounding layer. The first, second, third, seventh, eighth, tenth, eleventh, fourth, fifth, sixth, ninth, and twelfth branches are distributed on the first and second planes respectively, reducing the antenna area on the same plane and improving adaptability in a limited space. Simultaneously, the arrangement plane of each branch distributed on the two planes remains unchanged, allowing the antenna to maintain good performance. To meet the performance requirements within a limited space, the twelve branches of the antenna would form corners at the connecting points. In this solution, the connecting points of each branch are connected end-to-end, resulting in only one corner at the connection point. Reducing the number of corners improves the antenna's bandwidth and gain performance.

[0006] Furthermore, the eighth, eleventh, and a portion of the ninth stub affect the high-frequency resonant frequency; the seventh, tenth, and another portion of the ninth stub affect the intermediate-frequency resonant frequency; and the second, third, fourth, and fifth stubs affect the low-frequency resonant frequency. The sixth stub affects high-frequency impedance matching, and the twelfth stub affects impedance matching in the mid-to-high frequencies. The antenna body can thus be excited to multiple resonant frequency points.

[0007] Meanwhile, the seventh, eighth, ninth, tenth, eleventh, and twelfth branches are positioned between the first and second branches, and between the third and sixth branches. The first branch is connected to the connecting part, which is grounded. This grounding part surrounds the high-frequency branch, providing electromagnetic shielding, reducing external interference, controlling current distribution, and optimizing radiation characteristics.

[0008] In summary, the antenna in this scheme can be excited to multiple resonant frequencies, and its compact layout can meet the antenna performance requirements within a limited space, which is beneficial to improving the antenna's bandwidth and gain.

[0009] In some embodiments, the ninth stub includes a first sub-stub, a second sub-stub, and a third sub-stub. The third sub-stub is connected between the first and second sub-stubs. The first sub-stub is connected to the seventh stub, the second sub-stub is connected to the eighth stub, and the third sub-stub is connected to the second portion. By dividing the ninth stub into three sub-stubs, it is easier to arrange the antenna layout.

[0010] In some embodiments, the antenna body includes a first arc-shaped chamfered stub, a second arc-shaped chamfered stub, a seventh arc-shaped chamfered stub, and an eighth arc-shaped chamfered stub. The first arc-shaped chamfered stub connects the first portion and the first stub. The second arc-shaped chamfered stub connects the fourth stub and the second stub. The seventh arc-shaped chamfered stub connects the ninth stub and the seventh stub. The eighth arc-shaped chamfered stub connects the ninth stub and the eighth stub. Setting the corner between the first plane and the second plane as an arc-shaped chamfer allows for a smoother transition of current at the corner, reducing current abrupt changes and reflections, and improving the antenna's radiation performance.

[0011] In some embodiments, on the side of the first arc-shaped chamfered stub away from the second arc-shaped chamfered stub, the first portion, the first arc-shaped chamfered stub, and the first stub together form a first notch. Providing the first notch can reduce the stress on the antenna during antenna installation, reduce antenna wrinkles, and alleviate the performance degradation problem caused by antenna wrinkles.

[0012] In some embodiments, the second portion has a positioning hole that penetrates through the second portion. Providing the positioning hole allows for more convenient installation of the antenna body.

[0013] In some embodiments, the antenna further includes a metal housing and conductive foam. The metal housing has a first groove, and the antenna body is disposed within the first groove. The connecting portion is connected to the metal housing via the conductive foam. Containing the antenna body within the metal housing allows it to adapt to more working environments, such as in a vehicle environment where temperatures are high. The metal housing protects the antenna body and reduces the impact of high temperatures on the antenna. Simultaneously, the metal housing is robust and not easily damaged, providing good support and protection for the antenna body.

[0014] In some embodiments, the antenna further includes a substrate and a coaxial cable. The metal housing has a second groove and a third groove, the second groove communicating with the third groove, and both the second groove and the third groove communicating with the first groove. The substrate is disposed within the third groove. The coaxial cable includes a first segment, a second segment, and a third segment. One end of the first segment is connected to the substrate, and the other end extends into the second groove. One end of the third segment is connected to the connecting portion, and the other end extends into the second groove. The first segment and the third segment are disposed opposite to each other, the second segment is disposed in the second groove, and the second segment connects the first segment and the third segment. The substrate can provide an integration platform for other circuit components, connecting and assembling the antenna with other circuit components, thereby improving the antenna's functionality. The coaxial cable can efficiently transmit the radio frequency signals received by the antenna to the receiver, or transmit the radio frequency signals generated by the transmitter to the antenna for transmission.

[0015] In some embodiments, the antenna further includes a plastic cover disposed on the metal housing and covering the first groove and the second groove. The plastic cover includes a first wall surface and a second wall surface, the first wall surface being perpendicular to the second wall surface. The first, second, third, seventh, eighth, tenth, and eleventh segments located on the first plane are all adhered to the first wall surface. The connecting portion, fourth, fifth, sixth, ninth, and twelfth segments located on the second plane are all adhered to the second wall surface. By providing the plastic cover and attaching the antenna body to it, the antenna body can be supported, and the plastic material can reduce the impact on antenna radiation.

[0016] In some embodiments, the distance between the eleventh stub and the third stub is less than the distance between the tenth stub and the third stub. Adjusting the distance between the stubs can improve antenna performance, such as antenna return loss rate and antenna efficiency.

[0017] Secondly, this application also proposes a vehicle including an antenna as described in any of the embodiments of the first aspect above.

[0018] Additional aspects and advantages of the embodiments of this application will be described, shown, or illustrated in part by way of implementation of the embodiments of this application in the following description. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are not intended to limit the embodiments, and elements having the same reference numerals in the drawings are designated as similar elements.

[0020] Figure 1 This is a structural diagram of the antenna body according to some embodiments of this application;

[0021] Figure 2 This is a structural diagram of the antenna body, metal housing, and conductive foam of some embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the metal casing structure of some embodiments of this application;

[0023] Figure 4 This is a structural diagram of the antenna body, coaxial cable, metal housing, and substrate according to some embodiments of this application;

[0024] Figure 5 This is a structural diagram of the metal casing, plastic cover, and substrate of some embodiments of this application;

[0025] Figure 6 This is a structural diagram of the plastic cover and antenna body according to some embodiments of this application;

[0026] Figure 7 These are exploded views of some embodiments of this application;

[0027] Figure 8 Here are return loss rate test diagrams for antennas in some embodiments of this application;

[0028] Figure 9 These are efficiency test diagrams for antennas in some embodiments of this application;

[0029] Figure 10 This is a gain test diagram of an antenna according to some embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Antenna body; 10. Connecting part; 101. First part; 102. Second part; 1021. Positioning hole; 11. First branch; 12. Second branch; 13. Third branch; 14. Fourth branch; 15. Fifth branch; 16. Sixth branch; 17. Seventh branch; 18. Eighth branch; 19. Ninth branch; 191. First sub-branch; 192. Second sub-branch; 193. Third sub-branch; 110. Tenth branch; 111. Eleventh branch; 112. Twelfth branch; 113. First arc-shaped chamfered branch; 114. Second arc-shaped chamfered branch; 115. Seventh arc-shaped chamfered branch; 116. Eighth arc-shaped chamfered branch; 117. First notch;

[0031] 2. Metal casing; 21. First groove; 22. Second groove; 23. Third groove;

[0032] 3. Conductive foam;

[0033] 4. Substrate;

[0034] 5. Coaxial line; 51. First line segment; 52. Second line segment; 53. Third line segment;

[0035] 6. Plastic cover; 61. First wall surface; 62. Second wall surface. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0037] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0038] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0040] The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0041] Firstly, this application proposes an antenna, including an antenna body 1. Specifically, please refer to... Figure 1 The antenna body 1 includes a first branch 11, a second branch 12, a third branch 13, a seventh branch 17, an eighth branch 18, a tenth branch 110, and an eleventh branch 111 located in a first plane (not shown in the figure), and a connecting portion 10, a fourth branch 14, a fifth branch 15, a sixth branch 16, a ninth branch 19, and a twelfth branch 112 located in a second plane (not shown in the figure). The first plane is perpendicular to the second plane.

[0042] The first branch 11 and the second branch 12 are arranged opposite each other along a first direction (not shown in the figure), and the third branch 13 is connected between the first branch 11 and the second branch 12.

[0043] The connecting part 10 includes a first part 101 and a second part 102. The first part 101 is connected to the first branch 11, and the fourth branch 14 is connected to the second branch 12. The first part 101 and the fourth branch 14 are arranged opposite to each other along a first direction.

[0044] The fifth branch 15 is connected to the fourth branch 14, and the fifth branch 15 extends toward the second part 102. The sixth branch 16 is connected to the second part 102, and the sixth branch 16 extends toward the fifth branch 15, with a first gap (not shown in the figure) between the fifth branch 15 and the sixth branch 16.

[0045] The seventh branch 17 and the eighth branch 18 are both located between the first branch 11 and the second branch 12, and the seventh branch 17 and the eighth branch 18 are arranged opposite each other along the first direction.

[0046] The ninth branch 19 is disposed between the first part 101 and the fourth branch 14. One end of the ninth branch 19 is connected to the seventh branch 17, the other end is connected to the eighth branch 18, and the ninth branch 19 is connected to the second part 102.

[0047] The tenth branch 110 is connected to the end of the seventh branch 17 that is away from the ninth branch 19, and the tenth branch 110 extends toward the eighth branch 18.

[0048] Eleventh branch 111 is connected to the end of eighth branch 18 away from sixth branch 16, eleventh branch 111 extends toward seventh branch 17, and there is a second gap between eleventh branch 111 and tenth branch.

[0049] The twelfth branch 112 is connected to the end of the ninth branch 19 that is away from the fourth branch 14, and the twelfth branch 112 extends toward the second part 102.

[0050] In the above scheme, by arranging the layout of each branch of the antenna, the antenna can achieve good operating performance within a limited space. Specifically, the connecting part 10 can be grounded to form a grounding layer. The first branch 11, the second branch 12, the third branch 13, the seventh branch 17, the eighth branch 18, the tenth branch 110, the eleventh branch 111, the fourth branch 14, the fifth branch 15, the sixth branch 16, the ninth branch 19, and the twelfth branch 112 are respectively distributed on the first plane and the second plane, which reduces the area of ​​the antenna on the same plane and improves the adaptability of the antenna in a limited space. At the same time, the arrangement plane of each branch distributed on the two planes does not change, so that the antenna can have good performance. To meet the performance requirements within a limited space, the twelve branches of the antenna will form corners at the connection points. The number and angle of the corners will affect the energy transmission efficiency of the antenna. In the antenna layout, corners and the bending angle of the corners should be minimized as much as possible. The larger the bending angle of the corner, the smaller the angle of the corner, and the two are complementary angles. In this design, the connections between the various branches are made end-to-end, resulting in only one corner at each connection point. However, if the bend angle is too large, the antenna loss will increase; if the bend angle is too small, the space requirements will not be met. This design allows the corner to be set to 90°, achieving good antenna efficiency and bandwidth while still meeting space requirements.

[0051] In this design, the eighth branch 18, the eleventh branch 111, and a portion of the ninth branch 19 affect the high-frequency resonant frequency; the seventh branch 17, the tenth branch 110, and another portion of the ninth branch 19 affect the intermediate-frequency resonant frequency; and the second branch 12, the third branch 13, the fourth branch 14, and the fifth branch 15 affect the low-frequency resonant frequency. The sixth branch 16 affects high-frequency impedance matching, and the twelfth branch 112 affects mid-to-high-frequency impedance matching. The antenna body 1 can be excited to multiple resonant frequencies. It is understood that high frequency, mid-to-high frequency, intermediate frequency, and low frequency are relative concepts. For example, in the operating frequency bands of 700MHz-960MHz and 1710MHz-2690MHz, the high frequency could be 2350MHz, the intermediate frequency could be 1710MHz, and the low frequency could be 700MHz.

[0052] In this design, the seventh branch 17, the eighth branch 18, the ninth branch 19, the tenth branch 110, the eleventh branch 111, and the twelfth branch 112 are positioned between the first branch 11 and the second branch 12, and between the third branch 13 and the sixth branch 16. The first branch 11 is connected to the connecting part 10, which is grounded. This grounding part surrounds the high-frequency branch, providing electromagnetic shielding, reducing external interference, controlling current distribution, and optimizing radiation characteristics.

[0053] In summary, the antenna in this scheme can be excited to multiple resonant frequencies, and its compact layout can meet the antenna performance requirements within a limited space.

[0054] In some embodiments, please refer to Figure 1 The ninth stub 19 includes a first sub-stub 191, a second sub-stub 192, and a third sub-stub 193. The third sub-stub 193 connects between the first sub-stub 191 and the second sub-stub 192. The first sub-stub 191 is connected to the seventh stub 17, the second sub-stub 192 is connected to the eighth stub 18, and the third sub-stub 193 is connected to the second part 102. By dividing the ninth stub 19 into three sub-stubs, the antenna layout can be arranged more conveniently. For example, the sum of the lengths of the second sub-stub 192, the eighth sub-stub 18, and the tenth stub 110 is one-quarter of the wavelength of a high-frequency band (e.g., 2350MHz). The sum of the lengths of the first sub-stub 191, the seventh sub-stub, and the tenth stub 110 is one-quarter of the wavelength of a low-frequency band (e.g., 850MHz). The sum of the lengths of the second branch 12, the third branch 13, the fourth branch 14, and the fifth branch 15 is one-quarter the length of the low-frequency band (such as 700MHz).

[0055] In some embodiments, please refer to Figure 1 The antenna body 1 includes a first arc-shaped chamfered stub 113, a second arc-shaped chamfered stub 114, a seventh arc-shaped chamfered stub 115, and an eighth arc-shaped chamfered stub 116. The first arc-shaped chamfered stub 113 connects the first part 101 and the first stub 11. The second arc-shaped chamfered stub 114 connects the fourth stub 14 and the second stub 12. The seventh arc-shaped chamfered stub 115 connects the ninth stub 19 and the seventh stub 17. The eighth arc-shaped chamfered stub 116 connects the ninth stub 19 and the eighth stub 18. Setting the corner between the first and second planes as an arc-shaped chamfer allows for a smoother transition of current at the corner, reducing current abrupt changes and reflections, and improving the antenna's radiation performance.

[0056] In some embodiments, please refer to Figure 1 On the side of the first arc-shaped chamfered stub 113 away from the second arc-shaped chamfered stub 114, the first part 101, the first arc-shaped chamfered stub 113, and the first stub 11 together form a first notch 117. Providing the first notch 117 can reduce the stress on the antenna during antenna installation, reduce antenna wrinkles, and alleviate the performance degradation caused by antenna wrinkles.

[0057] In some embodiments, please refer to Figure 1 The second part 102 has a positioning hole 1021 that penetrates through the second part 102. The positioning hole 1021 makes it easier to install the antenna body 1.

[0058] In some embodiments, please refer to Figure 2 and Figure 3 The antenna also includes a metal housing 2 and conductive foam 3. The metal housing 2 has a first groove 21, and the antenna body 1 is disposed within the first groove 21. The connecting part 10 is connected to the metal housing 2 through the conductive foam 3. Placing the antenna within the metal housing 2 allows it to adapt to more working environments, such as in a vehicle environment where temperatures are high. The metal housing protects the antenna body 1 and reduces the impact of high temperatures on the antenna. At the same time, the metal housing 2 is sturdy and not easily damaged, providing good support and protection for the antenna body 1. It is understandable that, to better improve antenna performance, the first groove 21 can be connected to the outside.

[0059] In some embodiments, please refer to Figure 4 The antenna also includes a substrate 4 and a coaxial cable 5. The metal housing 2 has a second groove 22 and a third groove 23, which communicate with each other and are both connected to a first groove 21. The substrate 4 is disposed within the third groove 23. The coaxial cable 5 includes a first segment 51, a second segment 52, and a third segment 53. One end of the first segment 51 is connected to the substrate 4, and the other end extends into the second groove 22. One end of the third segment 53 is connected to the connecting portion 10, and the other end extends into the second groove 22. The first segment 51 and the third segment 53 are disposed opposite each other, and the second segment 52 is disposed in the second groove 22 and connects the first segment 51 and the third segment 53. The substrate 4 can contain circuitry for other modules, improving the antenna's functionality. The coaxial cable 5 can transmit energy to the antenna. The substrate 4 can provide an integration platform for other circuit components such as capacitors, resistors, and inductors, connecting and assembling the antenna body 1 with other circuit components, thereby improving the antenna's functionality. The coaxial cable 5 can efficiently transmit the radio frequency signals received by the antenna to the receiver, or transmit the radio frequency signals generated by the transmitter to the antenna for transmission.

[0060] In some embodiments, please refer to Figure 5 and Figure 6The antenna also includes a plastic cover 6, which is disposed on the metal housing 2 and covers the first groove 21 and the second groove 22. The plastic cover 6 includes a first wall 61 and a second wall 62, with the first wall 61 perpendicular to the second wall 62. The first branch 11, the second branch 12, the third branch 13, the seventh branch 17, the eighth branch 18, the tenth branch 110, and the eleventh branch 111, located on the first plane, are all adhered to the first wall 61. The connecting portion 10, the fourth branch 14, the fifth branch 15, the sixth branch 16, the ninth branch 19, and the twelfth branch 112, located on the second plane, are all adhered to the second wall 62. By providing the plastic cover 6 and attaching the antenna body 1 to it, the antenna body 1 can be supported, and the plastic material can reduce the impact on antenna radiation.

[0061] In some embodiments, the distance between the eleventh stub 111 and the third stub 13 is less than the distance between the tenth stub 110 and the third stub 13. By adjusting the distance between the stubs, the antenna's return loss rate, efficiency, and other performance characteristics can be improved.

[0062] To better illustrate this solution, test result graphs for some embodiments are provided. Please refer to them. Figure 8 , Figure 8 These are antenna return loss rate test graphs for some embodiments. As can be seen from the graphs, the antenna bandwidth is relatively wide, covering the frequency bands of 700MHz-960MHz and 1710MHz-2690MHz.

[0063] Please refer to Figure 9 , Figure 9 These are antenna efficiency test graphs for some embodiments. The graphs show that the antenna efficiency is good. Within the operating frequency band, the minimum efficiency is not less than 30%, and the average efficiency is not less than 44%.

[0064] Please refer to Figure 10 , Figure 10 These are antenna gain test graphs for some embodiments. As can be seen from the graphs, the antenna gain range is quite wide.

[0065] Secondly, this application also proposes a vehicle that includes an antenna as described in any of the embodiments of the first aspect.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An antenna, characterized in that, The antenna body includes a first stub, a second stub, a third stub, a seventh stub, an eighth stub, a tenth stub, and an eleventh stub located on a first plane, and a connecting portion, a fourth stub, a fifth stub, a sixth stub, a ninth stub, and a twelfth stub located on a second plane, wherein the first plane is perpendicular to the second plane. The connecting part is used for grounding; the first branch and the second branch are arranged opposite to each other along a first direction, and the third branch is connected between the first branch and the second branch; The connecting portion includes a first part and a second part, the first part is connected to the first branch, the fourth branch is connected to the second branch, and the first part and the fourth branch are arranged opposite to each other along the first direction; The fifth branch is connected to the fourth branch, and the fifth branch extends toward the second part; The sixth branch is connected to the second part, the sixth branch extends toward the fifth branch, and there is a first gap between the fifth branch and the sixth branch; The seventh branch and the eighth branch are both located between the first branch and the second branch, and the seventh branch and the eighth branch are arranged opposite to each other along the first direction; The ninth branch is disposed between the first part and the fourth branch, one end of the ninth branch is connected to the seventh branch, the other end is connected to the eighth branch, and the ninth branch is connected to the second part; The tenth branch is connected to the end of the seventh branch that is away from the ninth branch, and the tenth branch extends toward the eighth branch; The eleventh branch is connected to the end of the eighth branch away from the sixth branch, the eleventh branch extends toward the seventh branch, and there is a second gap between the eleventh branch and the tenth branch; The twelfth branch is connected to the end of the ninth branch that is away from the fourth branch, and the twelfth branch extends toward the second portion.

2. The antenna according to claim 1, characterized in that, The ninth branch includes a first sub-branch, a second sub-branch, and a third sub-branch. The third sub-branch is connected between the first sub-branch and the second sub-branch. The first sub-branch is connected to the seventh branch. The second sub-branch is connected to the eighth branch. The third sub-branch is connected to the second part.

3. The antenna according to claim 1, characterized in that, The antenna body includes a first arc-shaped chamfered stub, a second arc-shaped chamfered stub, a seventh arc-shaped chamfered stub, and an eighth arc-shaped chamfered stub; The first arc-shaped chamfered branch connects the first part and the first branch; The second arc-shaped chamfered branch connects the fourth branch to the second branch; The seventh arc-shaped chamfered branch is connected between the ninth branch and the seventh branch; The eighth arc-shaped chamfered branch connects the ninth branch and the eighth branch.

4. The antenna according to claim 3, characterized in that, On the side of the first arc-shaped chamfered branch away from the second arc-shaped chamfered branch, the first part, the first arc-shaped chamfered branch, and the first branch together form a first gap.

5. The antenna according to claim 1, characterized in that, The second part has a positioning hole that penetrates through the second part.

6. The antenna according to claim 1, characterized in that, The antenna also includes a metal housing and conductive foam. The metal housing has a first groove, and the antenna body is disposed in the first groove. The connecting part is connected to the metal housing through the conductive foam.

7. The antenna according to claim 6, characterized in that, The antenna also includes a substrate and a coaxial cable. The metal housing has a second groove and a third groove, the second groove and the third groove are connected, and both the second groove and the third groove are connected to the first groove. The substrate is disposed within the third groove; The coaxial cable includes a first segment, a second segment, and a third segment; One end of the first line segment is connected to the substrate, and the other end extends into the second groove; One end of the third line segment is connected to the connecting part, and the other end extends into the second groove; The first line segment is disposed opposite to the third line segment, the second line segment is disposed in the second groove, and the second line segment connects the first line segment and the third line segment.

8. The antenna according to claim 7, characterized in that, The antenna also includes a plastic cover disposed on the metal housing, and the plastic cover covers the first groove and the second groove; The plastic cover includes a first wall surface and a second wall surface, wherein the first wall surface is perpendicular to the second wall surface; The first branch, the second branch, the third branch, the seventh branch, the eighth branch, the tenth branch, and the eleventh branch located on the first plane are all adhered to the first wall surface; The connecting portion, the fourth branch, the fifth branch, the sixth branch, the ninth branch, and the twelfth branch located on the second plane are all adhered to the second wall surface.

9. The antenna according to claim 1, characterized in that, The distance between the eleventh branch and the third branch is less than the distance between the tenth branch and the third branch.

10. A car, characterized in that, The antenna includes any one of claims 1 to 9.

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