Waveguide antenna and radar system

Abstract

The utility model belongs to antenna technical field discloses a waveguide antenna and radar system, including first body, second body, antenna module and barrier component. Second body is connected in first body, antenna module is equipped with multiple groups interval, and each antenna module of group includes first cavity of being located in first body and second cavity of being located in second body, and first cavity is linked with second cavity, barrier component sets up between first body and second body, and barrier component is configured as in the communication of first cavity and second cavity and each antenna module is mutually blocked. The utility model provides waveguide antenna can reduce the crosstalk between antenna module, has good signal transmission stability.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a waveguide antenna and radar system. Background Technology

[0002] Waveguide antennas are an indispensable and important component in radar systems. They are devices that propagate and receive electromagnetic waves and determine the radar's detection direction.

[0003] In existing technologies, waveguide antennas have waveguide cavities, which are typically irregularly shaped. To facilitate the formation of the waveguide cavity, waveguide antennas are usually assembled from multiple bodies. Since some errors inevitably occur when connecting the bodies, gaps exist in the formed waveguide cavity except for the radiation port. When the waveguide antenna has a multi-antenna structure, the presence of these gaps leads to significant electromagnetic coupling between the antennas, which easily causes crosstalk and affects the stability of signal transmission. Utility Model Content

[0004] The first objective of this invention is to provide a waveguide antenna to solve the technical problem of crosstalk between antenna modules in the prior art.

[0005] The second objective of this utility model is to provide a radar system with high anti-crosstalk performance.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows: Waveguide antenna, including: first ontology; The second body is connected to the first body; The antenna module is provided in multiple groups at intervals. Each group of antenna modules includes a first cavity disposed in the first body and a second cavity disposed in the second body. The first cavity and the second cavity are connected. An isolation component is disposed between the first body and the second body, the isolation component being configured to isolate each of the antenna modules from each other at the connection between the first cavity and the second cavity.

[0007] In one embodiment, the barrier component includes a first barrier structure, the first barrier structure being annular, and the communication portion between the first cavity and the second cavity being located within the annular region of the first barrier structure.

[0008] In one embodiment, the first barrier structure includes a first boss and a first groove, the first boss being connected to one of the first body and the second body, the first groove being disposed on the other, and at least a portion of the first boss being located in the first groove.

[0009] In one embodiment, each antenna module is provided with a plurality of first blocking structures, and the plurality of first blocking structures are arranged at intervals from the inside to the outside along the direction close to the antenna module and away from the antenna module.

[0010] In one embodiment, the blocking component further includes a second blocking structure disposed between adjacent antenna modules; On the surfaces of the first and second bodies that are opposite each other, the line connecting any two of the antenna modules intersects the second barrier structure.

[0011] In one embodiment, the second barrier structure includes a second boss and a second groove, with at least a portion of the second boss located in the second groove; The second protrusion is disposed on the surface of the first body facing the second body, and the second groove is disposed on the surface of the second body facing the first body; or, the second protrusion is disposed on the surface of the second body facing the first body, and the second groove is disposed on the surface of the first body facing the second body.

[0012] In one embodiment, a plurality of second barrier structures are provided between two adjacent antenna modules, and the plurality of second barrier structures are arranged at intervals along the line connecting the two adjacent antenna modules.

[0013] In one embodiment, the blocking component is spaced apart from the antenna module.

[0014] In one embodiment, the first cavity has a first opening on the surface of the first body facing the second body, and the second cavity has a second opening on the surface of the second body facing the first body; the first opening and the second opening form the connecting portion.

[0015] The radar system includes the aforementioned antenna device.

[0016] The beneficial effects of this utility model are: The waveguide antenna has multiple antenna modules, enabling it to have rich functionality. An isolation component connects the first and second bodies, isolating the antenna modules at the connection between the first and second cavities. This effectively blocks the propagation of electromagnetic waves from adjacent antenna modules through the gap between the first and second bodies, thereby altering the propagation path and distribution of the electromagnetic field between the radiation cavities of adjacent antenna modules. This significantly reduces electromagnetic coupling between antenna modules, greatly minimizing crosstalk, improving signal transmission accuracy and stability, and ultimately enhancing communication quality. The radar system exhibits high anti-crosstalk performance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the waveguide antenna provided in one embodiment of the present invention; Figure 2 This is a first exploded view of a waveguide antenna provided in an embodiment of the present invention; Figure 3 This is a second exploded view of a waveguide antenna provided in one embodiment of the present invention; Figure 4 This is a third exploded view of a waveguide antenna provided in one embodiment of the present invention; Figure 5 This is a perspective view of a waveguide antenna provided in an embodiment of the present invention; Figure 6 This is a partially enlarged cross-sectional view of a waveguide antenna provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the first body provided in an embodiment of the present utility model; Figure 8 This is a schematic diagram of the structure of the second type of first body provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the third type of first body provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the fourth type of first body provided in one embodiment of the present utility model; Figure 11 This is a fourth exploded view of the waveguide antenna provided in one embodiment of the present invention; Figure 12 This is a fifth exploded view of a waveguide antenna provided in one embodiment of the present invention; Figure 13 To illustrate the radiation patterns of two waveguide antennas with different numbers of blocking components according to one embodiment of this application; Figure 14 Phase diagrams for adding different numbers of blocking components to two waveguide antennas according to one embodiment of this application; Figure 15 A comparison diagram showing the coupling degree of two waveguide antennas with different numbers of blocking components added according to one embodiment of this application.

[0019] In the picture: 1. First body; 2. Second body; 3. Antenna module; 31. First cavity; 311. First cavity port; 32. Second cavity; 321. Second cavity port; 33. Radiation element; 331. Radiation port; 332. Feed port; 10. Isolation component; 4. First barrier structure; 41. First boss; 42. First groove; 43. Annular area; 5. Second barrier structure; 51. Second boss; 52. Second groove. Detailed Implementation

[0020] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0021] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0025] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0026] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] This embodiment provides a waveguide antenna that can significantly reduce crosstalk between antenna modules and improve the stability of signal transmission.

[0029] It should be noted that a waveguide antenna is an antenna that transmits radio frequency energy bidirectionally between the air medium and the waveguide structure. Its core function is to efficiently conduct electromagnetic waves through a waveguide or coaxial interface, and it is commonly used in microwave communications, radar, and satellite systems. For example, such as Figures 1 to 10 As shown, the waveguide antenna includes a first body 1, a second body 2, an antenna module 3, and an isolation component 10. The second body 2 is connected to the first body 1.

[0030] For example, the first body 1 is connected to one side of the second body 2 in the thickness direction, and the second body 2 is connected to one side of the first body 1 in the thickness direction. Figure 1 or Figure 2 As shown, both the first body 1 and the second body 2 can be plate-shaped. Of course, it is understood that the first body 1 and the second body 2 can also be block-shaped, etc., and this embodiment does not limit this. Both the first body 1 and the second body 2 are conductors. For example, the materials of the first body 1 and the second body 2 are both metal materials, such as aluminum, copper, etc., and this embodiment does not limit this.

[0031] like Figure 1 As shown, in this embodiment, multiple antenna modules 3 are spaced apart. The arrangement of these multiple antenna modules 3 can be varied. For example, the multiple antenna modules 3 can be arranged sequentially at intervals along the length direction of the first body 1; or, the multiple antenna modules 3 can be arranged sequentially at intervals along the width direction of the first body 1; or, the multiple antenna modules 3 include multiple antenna modules spaced apart along both the length and width directions of the first body 1, for example, multiple antenna modules 3 can be arranged in an array along both the length and width directions of the first body 1. The specific arrangement of the antenna modules 3 can be selected according to requirements.

[0032] like Figure 2 and Figure 3 As shown, each antenna module 3 includes a first cavity 31 located in the first body 1 and a second cavity 32 located in the second body 2. The first cavity 31 and the second cavity 32 are connected and together form the radiation cavity of the antenna module 3, in which electromagnetic waves propagate.

[0033] In at least one possible implementation, a first cavity 31 is disposed on the surface of the first body 1 facing the second body 2, and a second cavity 32 is disposed on the surface of the second body 2 facing the first body 1. The first cavity 31 and the second cavity 32 are connected by a connecting portion (not shown in the figure).

[0034] In this embodiment, the isolation component 10 is disposed between the first body 1 and the second body 2. The blocking component 10 is configured to block each antenna module 3 from each other at the connecting part of the first cavity 31 and the second cavity 32, so that when the electromagnetic waves in the radiation cavity of each antenna module 3 propagate to other antenna modules 3, they can be completely blocked by the blocking component 10, thereby preventing mutual interference between two adjacent antenna modules 3.

[0035] It should be noted that the antenna module 3 is not limited to any specific direction of its adjacent antenna module 3. In this embodiment, the antenna module 3 is shielded from any adjacent antenna module 3 in any direction perpendicular to the thickness of the first body 1 by a blocking component 10.

[0036] It should be noted that after the first body 1 and the second body 2 are connected, there is still a gap between the surface of the first body 1 facing the second body 2 and the surface of the second body 2 facing the first body 1. When the electromagnetic waves in the radiation cavities of two adjacent antenna modules 3 propagate between the first cavity 31 and the second cavity 32, some of them will enter the gap between the first body 1 and the second body 2. If the isolation component 10 is not provided, the electromagnetic waves of one antenna module 3 will propagate through the gap between the first body 1 and the second body 2 to the radiation cavity of the other adjacent antenna module 3, thereby interfering with the electromagnetic waves of the other antenna module 3 and affecting its directivity, gain and other performance.

[0037] The waveguide antenna provided in this embodiment has multiple antenna modules 3, enabling the waveguide antenna to have rich functionality. An isolation component 10 is connected between the first body 1 and the second body 2. The isolation component 10 is used to block each antenna module 3 from each other at the connection between the first cavity 31 and the second cavity 32. This allows the isolation component 10 to effectively block the propagation of electromagnetic waves from adjacent antenna modules 3 through the gap between the first body 1 and the second body 2, thereby effectively changing the propagation path and distribution state of the electromagnetic field between the radiation cavities of adjacent antenna modules 3. This significantly weakens the electromagnetic coupling between antenna modules 3, thereby greatly reducing crosstalk, improving the accuracy and stability of signal transmission, and ultimately improving communication quality.

[0038] In at least one implementation, such as Figures 2 to 3 As shown, the blocking component includes a first blocking structure 4. The first blocking structure 4 is connected between the first body 1 and the second body 2. The first blocking structure 4 is annular, and the connecting portion between the first cavity 31 and the second cavity 32 is located within the annular region 43 of the first blocking structure 4. With this configuration, electromagnetic waves leaking from the connecting portion between the first cavity 31 and the second cavity 32 can be blocked by the first blocking structure 4, thus preventing them from propagating to other antenna modules 3. This alters the propagation path and distribution of the electromagnetic field between the radiating cavities of adjacent antenna modules 3, thereby significantly weakening the electromagnetic coupling between the antenna modules 3. In one embodiment, the first barrier structure 4 includes a first boss 41 and a first groove 42. At least a portion of the first boss 41 is located within the first groove 42. Figure 5As shown, the first protrusion 41 and the first groove 42 together form an annular region 43. That is, both the first protrusion 41 and the first groove 42 are annular. This arrangement allows the cooperation of the first protrusion 41 and the first groove 42 to form an effective electromagnetic barrier outside the connecting portion of the first cavity 31 and the second cavity 32, effectively reducing the amount of electromagnetic waves leaking through the first body 1 and the second body 2, thereby reducing the amount of electromagnetic energy escaping. This results in little or no leakage of electromagnetic waves escaping through the gap between the first body 1 and the second body 2, ensuring the signal strength of the waveguide antenna, thereby ensuring the signal stability of the waveguide antenna, improving the phase fluctuation of the waveguide antenna, and also increasing the zero-degree gain.

[0039] By setting the first blocking structure 4, the crosstalk problem between antenna modules 3 can be reduced, the coupling between antenna modules 3 can be improved, and the coupling between antenna modules 3 can be suppressed to a greater extent.

[0040] In some alternative embodiments, the annular region 43 can be a three-dimensional region, with the height of the annular region 43 being the height of the first boss 41, the length of the annular region 43 being the length of the first boss 41, and the width of the annular region 43 being the width of the first boss 41.

[0041] It should be noted that one or more first blocking structures 4 may be provided. When there is one first blocking structure 4, the periphery of one of the multiple antenna modules 3 is provided with the first blocking structure 4. When there are multiple first blocking structures 4, the periphery of at least two antenna modules 3 or all of the multiple antenna modules 3 is provided with the first blocking structure 4 in a corresponding manner.

[0042] In at least one embodiment, the first protrusion 41 is annular, and at least one first protrusion 41 is disposed around the periphery of the first cavity 311 and the second cavity 321 of each antenna module 3. That is, as shown in the figure... Figure 7 As shown, each antenna module 3 is provided with multiple first blocking structures 4. The multiple first blocking structures 4 are arranged at intervals from the inside to the outside along the direction close to the antenna module 3 and away from the antenna module 3. That is, each antenna module 3 is provided with multiple first protrusions 41, and the multiple first protrusions 41 are arranged at intervals from the inside to the outside along the direction close to the antenna module 3 and away from the antenna module 3. The first grooves 42 are provided in a one-to-one correspondence with the first protrusions 41.

[0043] With this configuration, multiple first protrusions 41 can be provided, arranged in a ring shape at intervals along the direction away from the antenna module 3. In this case, multiple first grooves 42 are provided in a one-to-one correspondence with the first protrusions 41, with each first protrusion 41 placed in its corresponding first groove 42. By providing multiple first blocking structures 4, energy leakage can be further reduced, thereby further improving the radiation efficiency of the waveguide antenna, ensuring signal strength, and simultaneously improving the phase fluctuation of the waveguide antenna and increasing zero-degree gain.

[0044] In this embodiment, as Figure 2 As shown, the first boss 41 is a rectangular ring structure.

[0045] In other embodiments, the first protrusion 41 can also be other polygonal ring structures (such as triangular ring structures, trapezoidal ring structures, etc.), circular ring structures, elliptical ring structures, fan-shaped ring structures, etc. The specific shape of the first protrusion 41 can be flexibly adjusted according to actual needs, and this embodiment does not limit the shape of the first protrusion 41.

[0046] In this embodiment, the shape of the first groove 42 matches the shape of the first boss 41.

[0047] Optionally, among two adjacent first protrusions 41, the annular region 43 formed by the first protrusion 41 and the first groove 42 closer to the antenna module 3 is located within the annular region 43 formed by the first protrusion 41 and the first groove 42 farther away from the antenna module 3.

[0048] In one embodiment, the multiple first protrusions 41 can be concentrically arranged, which makes the waveguide antenna structure more regular and facilitates the processing and manufacturing of the multiple first protrusions 41. Of course, it is understood that the multiple first protrusions 41 can also be eccentrically arranged, and this embodiment does not limit this.

[0049] In this embodiment, the first boss 41 is connected to one of the first body 1 and the second body 2, and the first groove 42 is disposed in the other, with at least a portion of the first boss 41 located in the first groove 42.

[0050] It should be noted that "at least a portion of the first protrusion 41 is located in the first groove 42" can be understood as at least a portion of the first protrusion 41 in the height direction being located in the first groove 42. For example, the entire first protrusion 41 may be located in the first groove 42, meaning the entire first protrusion 41 is located in the first groove 42. In this case, the first protrusion 41 does not have any portion located outside the first groove 42. The gap between the first body 1 and the second body 2 is then smaller, ensuring that the arrangement of the first protrusion 41 does not affect the surface contact between the first body 1 and the second body 2, thereby reducing the amount of electromagnetic waves leaking between the first body 1 and the second body 2. As another example, a portion of the first protrusion 41 in the height direction may be located in the first groove 42.

[0051] In order for all the annular first protrusions 41 to extend into the first groove 42, such as Figure 3 As shown, the first groove 42 is annular. The shape of the first groove 42 matches the shape of the first boss 41, allowing the first boss 41 to extend into the first groove 42. When the first groove 42 is provided on the first body 1, the first groove 42 is arranged around the periphery of the first cavity 31. When the first groove 42 is provided on the second body 2, the first groove 42 is arranged around the periphery of the second cavity 32.

[0052] In some optional embodiments, when the first protrusion 41 is provided on the first body 1, the first protrusion 41 and the first body 1 are an integral structure. This improves the integrity and connection strength of the first protrusion 41 and the first body 1, and reduces the risk of separation.

[0053] Similarly, when the first protrusion 41 is provided on the second body 2, the first protrusion 41 and the second body 2 form an integral structure.

[0054] To improve the shielding effect of the cooperating first protrusion 41 and first groove 42 on electromagnetic waves, in this embodiment, the surface of the first protrusion 41 abuts against the groove wall of the first groove 42. For example, the side wall of the first protrusion 41 facing the first cavity 31 abuts against the side wall of the first groove 42 facing the second cavity 32. The side wall of the first protrusion 41 away from the first cavity 31 abuts against the side wall of the first groove 42 away from the second cavity 32. The top surface of the first protrusion 41 abuts against the bottom surface of the first groove 42. With this configuration, there is a very small gap between the side wall of the first protrusion 41 and the side wall of the first groove 42, so that electromagnetic waves propagating to the first protrusion 41 through the gap between the first body 1 and the second body 2 will not re-enter the space between the groove walls of the first protrusion 41 and the first groove 42, but will instead be redistributed under the guidance of the first protrusion 41 and the first groove 42, thus reducing the energy leakage between the first body 1 and the second body 2.

[0055] In some alternative embodiments, the blocking component 10 is spaced apart from the antenna module 3. This ensures that the arrangement of the blocking component 10 does not affect the specific structure of the antenna module 3.

[0056] For example, the first barrier structure 4 is spaced apart from the antenna module 3, so that the arrangement of the first protrusion 41 and the first groove 42 does not affect the specific structure of the radiation cavity of the antenna module 3.

[0057] It should be noted that one or more first blocking structures 4 may be provided. When there is one first blocking structure 4, the periphery of one of the two adjacent antenna modules 3 is provided with the first blocking structure 4. When there are multiple first blocking structures 4, the periphery of at least two antenna modules 3 or all antenna modules 3 are provided with the first blocking structure 4 in a corresponding manner.

[0058] For example, such as Figure 2 or Figure 3 As shown, there are two first barrier structures 4 and two antenna modules 3 corresponding to each other, with the first barrier structure 4 surrounding the corresponding antenna module 3.

[0059] In at least one embodiment, the number of first blocking structures 4 is the same as the number of antenna modules 3, and they correspond one-to-one. Each first blocking structure 4 surrounds the periphery of the corresponding antenna module 3. In this way, crosstalk between antenna modules 3 can be further reduced.

[0060] In one embodiment, such as Figure 2 As shown, the two adjacent first blocking structures 4 are independent of each other. That is, the first blocking structure 4 is not connected to the adjacent first blocking structure 4, but is arranged at intervals. In this way, there can be at least two strip protrusions for blocking between two adjacent antenna modules 3, which can further improve the blocking effect of electromagnetic waves, reduce the coupling and crosstalk between antenna modules 3, and suppress the jitter amplitude of the radiation pattern.

[0061] In other embodiments, two adjacent first barrier structures 4 are connected, that is, two adjacent first barrier structures 4 are connected into a whole.

[0062] In at least one embodiment, the isolation component 10 includes a second barrier structure 5, such as Figure 11 and Figure 12As shown, the second barrier structure 5 is disposed between the first body 1 and the second body 2. Specifically, on the opposing surfaces of the first body 1 and the second body 2, the line connecting any two antenna modules 3 at any point intersects the second barrier structure 5. This arrangement allows the second barrier structure 5 to block the propagation of electromagnetic waves between the two antenna modules 3 through the gap between the first body 1 and the second body 2, reducing crosstalk between adjacent antenna modules 3 and weakening electromagnetic coupling between the antenna modules 3.

[0063] It should be noted that the line connecting any point on any two adjacent antenna modules 3 refers to the line connecting any point on one antenna module 3 to any point on the other antenna module 3. This line is not a real line, but a virtual line used to describe the relative positional relationship.

[0064] In one embodiment, such as Figure 11 and Figure 12 As shown, the second barrier structure 5 includes a second protrusion 51 and a second groove 52. At least a portion of the second protrusion 51 is located in the second groove 52. The second protrusion 51 can be disposed on the surface of the first body 1 facing the second body 2, and the second groove 52 can be disposed on the surface of the second body 2 facing the first body 1. Alternatively, the second protrusion 51 can be connected to the surface of the second body 2 facing the first body 1, and the second groove 52 can be disposed on the surface of the first body 1 facing the second body 2.

[0065] Electromagnetic waves propagating between the first body 1 and the second body 2 can be blocked by the second protrusion 51, reducing the crosstalk between electromagnetic waves in the two adjacent radiation cavities and achieving the purpose of weakening the electromagnetic coupling between the antenna modules 3. Furthermore, the specific structure of the second blocking structure 5 in this embodiment is relatively simple, requiring no large-scale modification to the overall structure of the waveguide antenna, reducing the difficulty and cost of processing and manufacturing, and having good economic benefits and practical application value.

[0066] In at least one implementation, such as Figure 11 As shown, the second protrusion 51 between two adjacent antenna modules 3 extends along a first direction, which intersects the line connecting the centers of the two adjacent antenna modules 3. The line connecting any point of the first cavity opening 311 of two adjacent antenna modules 3 intersects the second protrusion 51, and the line connecting any point of the second cavity opening 321 of two adjacent antenna modules 3 intersects the second protrusion 51. With this configuration, the second protrusion 51 can effectively block crosstalk between the antenna modules 3. Furthermore, the structure of the second protrusion 51 is relatively simple, facilitating the manufacturing of both the second protrusion 51 and the second groove 52.

[0067] A line connecting any point on the first cavity 311 of two adjacent antenna modules 3 intersects the second protrusion 51, and a line connecting any point on the second cavity 321 of two adjacent antenna modules 3 intersects the second protrusion 51. It should be noted that the line connecting any point on the first cavity 311 of two adjacent antenna modules 3 refers to the line connecting any point on one of the two adjacent first cavity 311 to any point on the other. This line is not a real line, but a virtual line drawn to describe the relative positional relationship.

[0068] It should be noted that the first direction only needs to intersect with the line connecting the centers of the two adjacent antenna modules 3, and this embodiment does not limit how the first direction is extended.

[0069] In one embodiment, the first direction can be Figure 5 The X-direction shown is the first direction, which is perpendicular to the line connecting the centers of the two antenna modules 3.

[0070] In other embodiments, the first direction can also be an inclined straight line, in which case one end of the second protrusion 51 is close to one of the antenna modules 3 and the other end is close to the other antenna module 3.

[0071] In other embodiments, the first direction may also be curved, for example, the first direction is the extension direction of the arc segment. In this case, the second protrusion 51 may be arc-shaped and bend toward one of the antenna modules 3.

[0072] In other embodiments, the first direction may also be the extension direction of a square wave, the extension direction of a wavy line, etc., which will not be listed one by one in this embodiment.

[0073] In at least one embodiment, the second boss 51 has a rectangular cross-section and a rectangular longitudinal section. In other embodiments, the longitudinal section of the second boss 51 may also be semi-circular, T-shaped, or other polygonal, etc., and this embodiment is not limited thereto. The shape of the second groove 52 matches the shape of the second boss 51 so that the second boss 51 can be engaged or inserted into the second groove 52. Alternatively, such as Figure 11 As shown, the shape of the second boss 51 can be a straight line. Alternatively, the shape of the second boss 51 can also be curved (e.g., arc, wavy line), and this embodiment does not limit this.

[0074] Optionally, in order to reduce the gap between the first body 1 and the second body 2, the second protrusion 51 is located as completely as possible in the second groove 52, that is, the first body 1 and the second body 2 are fitted together as closely as possible.

[0075] In one possible implementation, when the blocking component includes the second blocking structure 5, the surface of the second protrusion 51 abuts against the groove wall of the second groove 52. This configuration, while ensuring the second protrusion 51 is smoothly positioned in the second groove 52, further reduces the gap between the second protrusion 51 and the groove wall of the second groove 52. This further reduces the risk of electromagnetic wave leakage through the gap between the second protrusion 51 and the groove wall of the second groove 52, thereby reducing the probability of crosstalk and electromagnetic coupling between two adjacent antenna modules 3 through the gap between the second protrusion 51 and the groove wall of the second groove 52. This further improves the accuracy and stability of signal transmission, and ultimately enhances communication quality.

[0076] It should be noted that the surface of the second protrusion 51 refers to the surface of the second protrusion 51 located in the second groove 52. The number of surfaces of the second protrusion 51 is the same as the number of groove wall surfaces of the second groove 52 and they correspond to each other to improve the fit between the second protrusion 51 and the second groove 52.

[0077] To reduce the impact of the second protrusion 51 on the antenna module 3, in at least one embodiment, the second barrier structure 5 is spaced apart from the antenna module 3. When the isolation assembly 10 includes the second barrier structure 5, the second protrusion 51 and the antenna module 3 are independent of each other; that is, the second protrusion 51 is independent of the first cavity 31 and the first cavity opening 311, and the two are not connected or in contact. The second protrusion 51 is not used to form the first cavity 31. This arrangement can reduce the impact of the second protrusion 51 on the propagation of electromagnetic waves within the first cavity 31.

[0078] Optionally, the second groove 52 is independent of the antenna module 3. That is, the second groove 52 is not connected to the second cavity 32 and the second cavity opening 321. Electromagnetic waves in the second cavity 32 will not directly propagate to the second groove 52 to prevent the second groove 52 from affecting the structure of the second cavity 32.

[0079] In one embodiment, such as Figure 11 As shown, a second barrier structure 5 is provided between two adjacent antenna modules 3, that is, a second protrusion 51 is provided between two adjacent antenna modules 3. At this time, the second barrier structure 5 can be centrally located between the two antenna modules 3.

[0080] Optionally, when a second blocking structure 5 is provided between two adjacent groups of antenna modules 3, such as Figure 11As shown, two adjacent sets of antenna modules 3 can be symmetrically arranged with the second blocking structure 5 as the center of symmetry. This arrangement ensures that the distance between the second blocking structure 5 and the two antenna modules 3 is the same, and their relative positional relationship is also consistent. This allows the propagation path and distribution state of the electromagnetic field of the two antenna modules 3 to remain the same or have very little difference after being altered by the second blocking structure 5, thereby guaranteeing the consistency of the transmitted signals of the two antenna modules 3, reducing the amplitude of phase jitter of the antenna modules 3, and improving the signal transmission quality.

[0081] It is understandable that the distance between the second blocking structure 5 and the two antenna modules 3 may not be the same, and can be flexibly set according to requirements. It is also understandable that the two adjacent sets of antenna modules 3 may not be symmetrically arranged; this embodiment does not limit this.

[0082] In other embodiments, such as Figure 8 As shown, multiple second blocking structures 5 are provided between two adjacent antenna modules 3, that is, multiple second protrusions 51 are provided between two adjacent antenna modules 3. The multiple second protrusions 51 are arranged at intervals along the line connecting the two adjacent antenna modules 3. By providing multiple second protrusions 51, the electromagnetic coupling between the antenna modules 3 can be further weakened, thereby reducing or preventing crosstalk, ensuring the accuracy and stability of signal transmission, and improving communication quality. Furthermore, by providing multiple second blocking structures 5, the radiation pattern of the waveguide antenna can also be improved; specifically, the waveguide antenna's radiation pattern jitter can be reduced, and the 0-degree gain can be increased.

[0083] Alternatively, the distance between two adjacent second protrusions 51 is greater than or equal to 0.5 mm. This satisfies the processing requirements and minimizes the impact of the second barrier structure 5 on the structural strength of the first body 1 and the second body 2.

[0084] It should be noted that the distance between two adjacent second grooves 52 is greater than or equal to 0.5 mm. For example, the distance between two adjacent second protrusions 51 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, etc., and this embodiment does not limit this.

[0085] For example, Figure 8 A schematic diagram is shown showing three second blocking structures 5 between two adjacent antenna modules 3. The three second blocking structures 5 are equally spaced between the two antenna modules 3.

[0086] In at least one embodiment, such as Figure 4As shown, the first cavity 31 includes a first cavity opening 311 disposed on the surface of the first body 1 facing the second body 2. The projection of the first cavity opening 311 of each antenna module 3 onto the first cavity opening 311 of any adjacent antenna module 3 is completely blocked by at least one second blocking structure 5. By setting the relative position of the first cavity opening 311 and the second blocking structure 5 to meet the above requirements, the electromagnetic waves propagating from the first cavity opening 31 to the adjacent antenna module 3 are blocked by the second blocking structure 5 after propagating out from the first cavity opening 311, thereby reducing crosstalk.

[0087] In one embodiment, such as Figure 3 As shown, the second cavity 32 includes a second cavity opening 321 disposed on the surface of the second body 2 facing the first body 1. In this embodiment, the first cavity opening 311 and the second cavity opening 321 form a connecting portion. The projection of the second cavity opening 321 of each antenna module 3 onto the second cavity opening 321 of any adjacent antenna module 3 is completely blocked by the second blocking structure 5. With this configuration, after the electromagnetic waves in the second cavity 32 propagate out from the second cavity opening 321, part of the electromagnetic waves propagating towards the adjacent antenna module 3 will be blocked by the second blocking structure 5, thereby reducing the occurrence of crosstalk.

[0088] In one embodiment, when both the first barrier structure 4 and the second barrier structure 5 are present, the second barrier structure 5 can be disposed within the first barrier structure 4. In this embodiment, the first barrier structure 4 is annular, and the second barrier structure 5 is disposed within the annular region 43 formed by the first barrier structure 4. For example, as... Figure 4 As shown, the first boss 41 and the second boss 51 are both disposed on the first body 1, and the second boss 51 is located inside the annular first boss 41.

[0089] In other embodiments, the second barrier structure 5 is disposed outside the first barrier structure 4; that is, the second barrier structure 5 may also be located within the area enclosed by the first barrier structure 4, but rather spaced apart from the first barrier structure 4. For example, as Figure 7 As shown, the first boss 41 and the second boss 51 are both provided on the first body 1, and the second boss 51 is located outside the annular first boss 41.

[0090] Whether the second protrusion 51 is located inside the first protrusion 41 or outside the first protrusion 41, it can further improve the coupling and crosstalk between antenna modules 3, and also reduce the leakage flux.

[0091] It should be noted that when both adjacent antenna modules 3 are surrounded by a first blocking structure 4, such as Figure 7 As shown, the second protrusion 51 of the second barrier structure 5 can be located between the first protrusions 41 of the two first barrier structures 4. In other embodiments, such as Figure 9As shown, the second protrusion 51 can also be located within the annular area formed by any one of the two first protrusions 41, but this embodiment does not limit this.

[0092] When one of the two adjacent antenna modules 3 has a first blocking structure 4 around its periphery, such as Figure 10 As shown, the second protrusion 51 of the second barrier structure 5 can be located outside the first protrusion 41 of the first barrier structure 4. Of course, it can be understood that the second protrusion 51 of the second barrier structure 5 can also be located inside the first protrusion 41 of the first barrier structure 4, and this embodiment does not limit this.

[0093] Optionally, one or more second blocking structures 5 are provided between two adjacent antenna modules 3. The relative positional relationship between each second blocking structure 5 and the first blocking structure 4 is selected according to requirements based on the above description, and will not be repeated here in this embodiment.

[0094] In at least one implementation, such as Figures 4 to 6 As shown, the waveguide antenna also includes multiple radiating elements 33. These multiple radiating elements 33 are disposed on the second body 2. Furthermore, as... Figure 4 As shown, the radiating element 33 forms a radiation port 331 on the surface of the second body 2 opposite to the first body 1, and the antenna module 3 forms a feed port 332 on the surface of the first body 1 opposite to the second body. Electromagnetic waves in the second cavity 32 of the second body 2 are radiated out through the radiating element 33 and the radiation port 331, or electromagnetic waves received by the radiation port 331 are propagated into the second cavity 32 through the radiating element 33. In this embodiment, the second body 2 has a relatively large thickness, which facilitates the manufacture of the radiating element 33.

[0095] In other alternative embodiments, the radiating unit 33 may also be disposed on the first body 1. In this case, the radiating unit 33 forms a radiating port 331 on the surface of the first body 1 facing away from the second body 2, and the antenna module 3 forms a feed port 332 on the surface of the second body 2 facing away from the first body 1.

[0096] For example, the waveguide antenna in this embodiment has a double-layer plate structure, such as... Figures 2 to 4 As shown, the waveguide antenna in this embodiment includes a first body 1 and a second body 2. The first body 1 has a first protrusion 41 on the side facing the second body 2, and the second body 2 has a second groove 52 on the side facing the first body 1.

[0097] Alternatively, the waveguide antenna can also be a multi-layer board structure.

[0098] The waveguide antenna provided in this embodiment has the advantages of reducing crosstalk between antenna modules 3, improving energy leakage, and high cost efficiency.

[0099] Specifically, reducing crosstalk between antenna modules 3 is mainly reflected in the following: by rationally designing the structural parameters and arrangement of the first protrusion 41, the first groove 42, the first protrusion 41 and the second groove 52, the propagation path and distribution state of the electromagnetic field between the radiation intensity of antenna modules 3 can be effectively changed, significantly weakening the electromagnetic coupling between antenna modules 3, thereby greatly reducing crosstalk, improving the accuracy and stability of signal transmission, and enhancing communication quality.

[0100] The improvement in energy leakage is mainly reflected in the following aspects: For energy leakage caused by processing errors in the first body 1 and the second body 2, the mating structure of the first boss 41 and the first groove 42, and the mating structure of the second boss 51 and the second groove 52, can form a special electromagnetic barrier at the connection interface between the first cavity 31 and the second cavity 32. When energy leakage tends to occur due to processing errors, the first barrier structure 4 and the second barrier structure 5 can guide the redistribution of leaked energy, reduce energy escape, improve the radiation efficiency of the waveguide antenna, enhance signal strength, and ensure the normal operation of the system.

[0101] The high cost-effectiveness is mainly reflected in the fact that, compared with the traditional methods of solving crosstalk and energy leakage problems through high-precision processing technology or complex structural optimization, the waveguide antenna provided in this embodiment only needs to add a relatively simple first blocking structure 4 and second blocking structure 5 between the first body 1 and the second body 2. The first blocking structure 4 includes a simple first protrusion 41 and a first groove 42, and the second blocking structure 5 includes a simple second groove 52 and a second protrusion 51. There is no need to make large-scale modifications to the overall structure of the waveguide antenna, which reduces the processing difficulty and cost, and has good economic benefits and practical application value.

[0102] Figure 13 The radiation patterns of two waveguide antennas with different numbers of blocking components added according to one embodiment of this application are shown; wherein, the horizontal axis is the observation angle in degrees, and the vertical axis is the gain value in dB. From Figure 13 As can be seen, when a 0.1mm gap appears between the first body 1 and the second body 2, the 0-degree gain of the waveguide antenna drops significantly, and the overall radiation pattern shifts to a negative angle of about 5 degrees. Two noticeable dips appear at small angles. Adding the blocking components effectively mitigates this radiation pattern shift and the appearance of the dips. The simulation results show that the number of blocking components affects the degree of radiation pattern improvement. The more blocking components there are, the less the waveguide antenna's radiation pattern jitter is, the higher the 0-degree gain is, and the closer it is to the ideal seamless situation.

[0103] Figure 14 Phase diagrams for adding different numbers of blocking components to two waveguide antennas according to one embodiment of this application; wherein the horizontal axis is the observation angle in degrees, and the vertical axis is the phase difference in degrees. From Figure 14As can be seen, when a 0.1mm gap appears between the first body 1 and the second body 2 of the waveguide antenna, the phase of the waveguide antenna experiences severe jitter, ranging from -20° to 25°. After adding the blocking components, the phase jitter can be effectively controlled within -15° to 5°. Furthermore, the more blocking components there are, the smoother the phase curve becomes.

[0104] Figure 15 This is a comparison diagram showing the coupling degree of two waveguide antennas with different numbers of blocking components added according to one embodiment of this application. The horizontal axis represents frequency in Hz, and the vertical axis represents coupling degree in dB. Figure 15 As can be seen, based on the premise of no gap between the first body 1 and the second body 2, when a gap of 0.1mm appears between the first body 1 and the second body 2, the coupling deteriorates significantly, by nearly 30dB. Adding an isolation component 10 between the first body 1 and the second body 2 effectively improves the coupling between the antenna modules 3. Furthermore, whether a first isolation structure 4 or a second isolation structure 5 is used between the first body 1 and the second body 2, the improvement in coupling is very noticeable. Figure 15 As shown by the dotted and dashed lines, the more second blocking structures 5 there are, the more significant the improvement in coupling. As the results show, the first protrusion 41 can suppress coupling between antenna modules 3 to a greater extent. For antenna arrays, this type of structure can also effectively improve electromagnetic wave leakage.

[0105] In summary, by adding an obstruction component 10 between the first body 1 and the second body 2 of the waveguide antenna, and by changing the number, height, and arrangement of the obstruction component, the performance of the waveguide antenna (such as radiation pattern, phase, and coupling) caused by the gap between the first body 1 and the second body 2 can be effectively mitigated, thereby improving radar detection performance.

[0106] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A waveguide antenna, characterized by include: first ontology; The second body is connected to the first body; The antenna module is provided in multiple groups at intervals. Each group of antenna modules includes a first cavity disposed in the first body and a second cavity disposed in the second body. The first cavity and the second cavity are connected. An isolation component is disposed between the first body and the second body, the isolation component being configured to isolate each of the antenna modules from each other at the connection between the first cavity and the second cavity.

2. The waveguide antenna of claim 1, wherein, The barrier component includes a first barrier structure, which is annular, and the connecting portion between the first cavity and the second cavity is located within the annular region of the first barrier structure.

3. The waveguide antenna of claim 2, wherein, The first barrier structure includes a first boss and a first groove. The first boss is connected to one of the first body and the second body, and the first groove is disposed in the other body. At least a portion of the first boss is located in the first groove.

4. The waveguide antenna of claim 2, wherein, Each antenna module is provided with a plurality of first blocking structures, which are arranged at intervals from the inside to the outside along the direction close to the antenna module and away from the antenna module.

5. The waveguide antenna according to any one of claims 1-4, wherein, The blocking component further includes a second blocking structure, which is disposed between adjacent antenna modules; On the surfaces of the first and second bodies that are opposite each other, the line connecting any two of the antenna modules intersects the second barrier structure.

6. The waveguide antenna according to claim 5, characterized in that, The second barrier structure includes a second boss and a second groove, with at least a portion of the second boss located in the second groove; The second protrusion is disposed on the surface of the first body facing the second body, and the second groove is disposed on the surface of the second body facing the first body; or, the second protrusion is disposed on the surface of the second body facing the first body, and the second groove is disposed on the surface of the first body facing the second body.

7. The waveguide antenna of claim 5, wherein, A plurality of second barrier structures are provided between two adjacent antenna modules, and the plurality of second barrier structures are arranged at intervals along the line connecting the two adjacent antenna modules.

8. The waveguide antenna of claim 1, wherein, The blocking component is spaced apart from the antenna module.

9. The waveguide antenna of claim 1, wherein, The first cavity has a first opening on the surface of the first body facing the second body, and the second cavity has a second opening on the surface of the second body facing the first body; the first opening and the second opening form the connecting portion.

10. A radar system characterized by, Including the waveguide antenna as described in any one of claims 1-9.

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