Antenna device and radar system

Abstract

The invention belongs to the technical field of antennas, and discloses an antenna device and a radar system, and the antenna device comprises a first body, a second body, an antenna module and an isolation assembly. A plurality of antenna modules are arranged at intervals, each antenna module comprises a first cavity formed in the first body and a second cavity formed in the second body, and the first cavity is communicated with the second cavity; the isolation assembly comprises a ridge structure and a groove structure matched with the ridge structure, and the ridge structure and the groove structure are arranged between the first body and the second body; and in an area between the first body and the second body, the projection of each antenna module to any adjacent antenna module is completely shielded by the ridge structure. According to the antenna device and the radar system provided by the invention, crosstalk between the antenna modules can be reduced, the accuracy and stability of signal transmission are improved, and the communication quality is further improved.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to an antenna device and a radar system. Background Art

[0002] The antenna device is one of the indispensable and important components in the radar system. It is a device that transmits and receives electromagnetic waves and determines the direction of radar detection.

[0003] In the prior art, antenna devices have waveguide cavities, which are typically shaped. To facilitate the formation of the waveguide cavity, antenna devices are typically assembled from multiple bodies. Due to the inevitable errors in the connection of the bodies, the resulting waveguide cavity contains gaps beyond the radiation port. When the antenna device has multiple antennas, the presence of these gaps can lead to significant crosstalk between the antennas, resulting in poor antenna performance. Summary of the Invention

[0004] A first object of the present invention is to provide an antenna device to solve the technical problems of large crosstalk and poor performance in the prior art.

[0005] A second object of the present invention is to provide a radar system with high anti-crosstalk performance.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] An antenna device comprising:

[0008] first ontology;

[0009] a second body connected to the first body;

[0010] A plurality of antenna modules are arranged at intervals, each of the antenna modules including a first cavity provided in the first body and a second cavity provided in the second body, the first cavity being in communication with the second cavity;

[0011] The isolation component includes a ridge structure and a groove structure cooperating with the ridge structure, and the ridge structure and the groove structure are arranged between the first body and the second body; in the area between the first body and the second body, the projection of each antenna module onto any adjacent antenna module is completely blocked by the ridge structure.

[0012] In one embodiment, the first cavity includes a first cavity opening provided on a surface of the first body facing the second body, and a projection of the first cavity opening of each antenna module onto the first cavity opening of any adjacent antenna module is completely blocked by at least one ridge structure;

[0013] The second cavity includes a second cavity opening provided on a surface of the second body facing the first body, and a projection of the second cavity opening of each antenna module onto the second cavity opening of any adjacent antenna module is completely blocked by at least one ridge structure.

[0014] In one embodiment, the isolation component includes a first isolation structure, the first isolation structure includes a first ridge and a first groove; at least a portion of the first ridge is located in the first groove; the first ridge is arranged between adjacent antenna modules, the first cavities of two adjacent antenna modules are isolated from each other by the first ridge, and the second cavities of two adjacent antenna modules are isolated from each other by the first ridge.

[0015] In one embodiment, the first ridge between two adjacent antenna modules extends along a first direction, and the first direction intersects with a line connecting the centers of the two adjacent antenna modules; a line connecting any of the first cavities of the two adjacent antenna modules intersects with the first ridge, and a line connecting any of the second cavities of the two adjacent antenna modules intersects with the first ridge.

[0016] In one embodiment, the first ridge is provided on a surface of the first body facing the second body, and the first groove is provided on a surface of the second body facing the first body;

[0017] Alternatively, the first ridge is provided on a surface of the second body facing the first body, and the first groove is provided on a surface of the first body facing the second body.

[0018] In one embodiment, a plurality of first ridges are provided between two adjacent antenna modules, and the plurality of first ridges are arranged at intervals along a line connecting the two adjacent antenna modules.

[0019] In one embodiment, the distance between two adjacent first ridges is greater than or equal to 0.5 mm.

[0020] In one embodiment, the isolation component includes a second isolation structure, the second isolation structure includes a second ridge and a second groove, at least a portion of the second ridge is located in the second groove, the second ridge and the second groove together form a closed area, and the first cavity opening and the second cavity opening are located in the closed area.

[0021] In one embodiment, the second ridge is annular, and at least one first ridge is disposed around the first cavity and the second cavity of each antenna module.

[0022] In one embodiment, the second ridge is disposed on one of the first body and the second body, and the second groove is disposed on the other one.

[0023] In one embodiment, each antenna module is correspondingly provided with a plurality of second ridges, and the plurality of second ridges are spaced apart from the inside to the outside along a direction close to the antenna module to a direction away from the antenna module, and the second grooves are provided in a one-to-one correspondence with the second ridges.

[0024] In one embodiment, the ridge structure is spaced apart from the antenna module.

[0025] In one embodiment, the surface of the ridge structure abuts against the groove wall surface of the groove structure.

[0026] In one embodiment, the height of the ridge structure is less than or equal to the groove depth of the groove structure.

[0027] In one embodiment, the antenna module further includes a radiation unit disposed on the second body, the radiation unit forming a radiation port on the surface of the second body facing away from the first body, and the antenna module forming a feeding port on the surface of the first body facing away from the second body.

[0028] A radar system includes the above antenna device.

[0029] Beneficial effects of the present invention:

[0030] In the antenna device, multiple antenna modules are provided, so that the antenna device can have richer functions. An isolation component is connected between the first body and the second body. The isolation component includes a ridge structure and a groove structure that cooperate with each other. In the area between the first body and the second body, the projection of each antenna module onto any adjacent antenna module is completely blocked by the ridge structure, so that the ridge structure can effectively block the electromagnetic waves of adjacent antenna modules from propagating through the gap between the first body and the second body, thereby effectively changing the propagation path and distribution state of the electromagnetic field between the radiation cavities of adjacent antenna modules, thereby significantly weakening the electromagnetic coupling between the antenna modules, thereby greatly reducing crosstalk, improving the accuracy and stability of signal transmission, and thus improving communication quality.

[0031] In addition, the ridge structure can also form an electromagnetic barrier between the antenna modules, thereby reducing the energy escape of each antenna module, thereby improving the radiation efficiency of the antenna module and enhancing the signal strength.

[0032] The radar system has high anti-crosstalk performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0034] Figure 1 is a structural diagram of a first antenna device provided by an embodiment of the present invention;

[0035] Figure 2 is a first exploded view of a first antenna device provided by one embodiment of the present invention;

[0036] Figure 3 is a second exploded view of the first antenna device provided by one embodiment of the present invention;

[0037] Figure 4 is a structural schematic diagram of a first body of a first antenna device provided by an embodiment of the present invention;

[0038] Figure 5 is a partially enlarged view of a cross-sectional view of the first antenna device provided by an embodiment of the present invention;

[0039] Figure 6 is a perspective view of a first antenna device provided by one embodiment of the present invention;

[0040] Figure 7 is a structural schematic diagram of a first body of a second antenna device provided by an embodiment of the present invention;

[0041] Figure 8 is an exploded view of a second antenna device provided by an embodiment of the present invention;

[0042] Figure 9 is a perspective view of a second antenna device provided by one embodiment of the present invention;

[0043] Figure 10 is a partially enlarged view of a cross-sectional view of a second antenna device provided by one embodiment of the present invention;

[0044] Figure 11 is a first exploded view of a third antenna device provided by an embodiment of the present invention;

[0045] Figure 12 is a second exploded view of a third antenna device provided by an embodiment of the present invention;

[0046] Figure 13 is a perspective view of a third antenna device provided by an embodiment of the present invention;

[0047] Figure 14 is a partially enlarged cross-sectional view of a third antenna device provided by one embodiment of the present invention;

[0048] Figure 15 Directional patterns of two antenna devices according to one embodiment of the present application with different numbers of ridge structures added;

[0049] Figure 16 Phase diagrams for adding different numbers of ridge structures to two antenna devices according to one embodiment of the present application;

[0050] Figure 17 The figure is a comparison diagram of coupling degrees of two antenna devices according to one embodiment of the present application with different numbers of ridge structures added.

[0051] In the picture:

[0052] 1. First body; 2. Second body; 3. Antenna module; 31. First cavity; 311. First cavity opening; 32. Second cavity; 321. Second cavity opening; 33. Radiating element; 331. Radiating opening;

[0053] 10. Isolation assembly; 4. First isolation structure; 41. First ridge; 42. First groove; 5. Second isolation structure; 51. Second ridge; 52. Second groove; 53. Enclosed area. DETAILED DESCRIPTION

[0054] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0055] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Therefore, appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0057] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0058] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0059] In the description of this embodiment, terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate description and simplify operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used only to distinguish in the description and have no special meaning.

[0060] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be an element located in the middle.

[0061] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0062] This embodiment provides an antenna device that can reduce crosstalk between antenna modules and has good performance.

[0063] The antenna device in this embodiment can be an antenna device, which is an antenna that transmits radio frequency energy bidirectionally between an air medium and a waveguide structure. Its core function is to efficiently conduct electromagnetic waves through a waveguide or coaxial interface, and is commonly used in microwave communications, radar and satellite systems.

[0064] For example, Figure 1 and Figure 2 As shown, the antenna device 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. 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, the first body 1 and the second body 2 can both be plate-shaped. Of course, it is understandable that the first body 1 and the second body 2 can also be block-shaped, etc., and this embodiment does not limit this. The first body 1 and the second body 2 are both conductors. For example, the first body 1 and the second body 2 are both made of metal materials, such as aluminum, copper, etc., and this embodiment does not limit this.

[0065] like Figure 1 As shown, in this embodiment, multiple antenna modules 3 are spaced apart. The multiple antenna modules 3 can be arranged in various ways. For example, the multiple antenna modules 3 can be spaced apart along the length of the first body 1; alternatively, the multiple antenna modules 3 can be spaced apart along the width of the first body 1; alternatively, the multiple antenna modules 3 can include both multiple antenna modules 3 spaced apart along the length of the first body 1 and multiple antenna modules 3 spaced apart along the width of the first body 1, for example, multiple antenna modules 3 can be arranged in an array along both the length and width of the first body 1. The specific arrangement of the antenna modules 3 can be selected based on needs.

[0066] like Figure 2 and Figure 3 As shown, each antenna module 3 includes a first cavity 31 provided in the first body 1 and a second cavity 32 provided in the second body 2. The first cavity 31 is connected to the second cavity 32 to form a radiation cavity of the antenna module 3, and electromagnetic waves propagate in the radiation cavity.

[0067] In at least one embodiment, the first cavity 31 is arranged on the surface of the first body 1 facing the second body 2, and the second cavity 32 is arranged on the surface of the second body 2 facing the first body 1. The first cavity 31 and the second cavity 32 are connected through openings on the first body 1 and the second body 2.

[0068] In this embodiment, the isolation assembly 10 is disposed between the first body 1 and the second body 2. Furthermore, the isolation assembly 10 includes a ridge structure (not shown) and a groove structure (not shown) that cooperates with the ridge structure. Specifically, the ridge structure and the groove structure are disposed between the first body 1 and the second body 2. Within the region between the first body 1 and the second body 2, the projection of each antenna module 3 onto any adjacent antenna module 3 is completely blocked by the ridge structure. Specifically, the projection of the portion of each antenna module 3 located between the first body 1 and the second body 2 (specifically, the portion connecting the first cavity 31 and the second cavity 32) onto other adjacent antenna modules 3 is completely blocked by the ridge structure and does not project onto other antenna modules 3. With this arrangement, the electromagnetic waves within the radiation cavity of each antenna module 3 are completely blocked by the ridge structure when propagating between the first body 1 and the second body 2 toward other antenna modules 3, thereby preventing mutual interference between adjacent antenna modules 3.

[0069] It should be noted that the direction in which an antenna module 3 is aligned with any adjacent antenna module 3 is not limited. In this embodiment, a ridge structure shields the antenna module 3 from any adjacent antenna module 3 in any direction perpendicular to the thickness of the first body 1. It should also be noted that the ridge structure and the groove structure can cooperate in various ways. In this embodiment, the ridge structure and the groove structure can cooperate in such a way that at least a portion of the ridge structure is located within the groove structure.

[0070] It should be noted that in the related art, 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 the two adjacent antenna modules 3 propagate between the first cavity 31 and the second cavity 32, they will partially 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 another adjacent antenna module 3, thereby interfering with the electromagnetic waves of the other antenna module 3, affecting the directivity, gain and other performance.

[0071] The antenna device provided in this embodiment is provided with multiple antenna modules 3, so that the antenna device can have richer functions. An isolation component 10 is connected between the first body 1 and the second body 2. The isolation component 10 includes a ridge structure and a groove structure that cooperate with each other. In the area between the first body 1 and the second body 2, the projection of each antenna module 3 onto any adjacent antenna module 3 is completely blocked by the ridge structure, so that the ridge structure can effectively block the electromagnetic waves of adjacent antenna modules 3 from propagating 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, thereby significantly weakening the electromagnetic coupling between the antenna modules 3, thereby greatly reducing crosstalk, improving the accuracy and stability of signal transmission, and thus improving communication quality.

[0072] Furthermore, the ridge structure can also form an electromagnetic barrier between the antenna modules 3, thereby reducing the energy escape of each antenna module 3, thereby improving the radiation efficiency of the antenna module 3 and enhancing the signal strength.

[0073] In at least one embodiment, Figure 4 As 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 ridge structure. By setting the relative position of the first cavity opening 311 and the ridge structure of the isolation assembly 10 to meet the above requirements, after the electromagnetic waves within the first cavity 31 propagate out of the first cavity opening 311, the electromagnetic waves propagating toward the adjacent antenna module 3 are blocked by the ridge structure, thereby reducing the occurrence of crosstalk.

[0074] In one embodiment, the second cavity 32 includes a second cavity opening 321 disposed on the surface of the second body 2 facing the first body 1. 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 at least one ridge structure. With this arrangement, after electromagnetic waves within the second cavity 32 propagate out of the second cavity opening 321, the portion of the electromagnetic waves that propagate toward the adjacent antenna module 3 is blocked by the ridge structure, thereby reducing crosstalk.

[0075] In at least one embodiment, the isolation assembly 10 includes a first isolation structure 4. Figure 5As shown, the first isolation structure 4 includes a first ridge 41 and a first groove 42. At least a portion of the first ridge 41 is located in the first groove 42. That is, the first ridge 41 is equivalent to the ridge structure described above, and the first groove 42 is equivalent to the groove structure described above. The first ridge 41 can be connected to the surface of the first body 1 facing the second body 2, and the first groove 42 is provided on the surface of the second body 2 facing the first body 1. Of course, it is understandable that the first ridge 41 can also be connected to the surface of the second body 2 facing the first body 1, and the first groove 42 can be provided on the surface of the first body 1 facing the second body 2. This is not limited to this in this embodiment.

[0076] Electromagnetic waves propagating between the first body 1 and the second body 2 are blocked by the first ridge 41, reducing crosstalk between electromagnetic waves in two adjacent radiation cavities and weakening electromagnetic coupling between antenna modules 3. Furthermore, the specific structure of the first isolation structure 4 in this embodiment is relatively simple, eliminating the need for large-scale modifications to the overall structure of the antenna device. This reduces manufacturing difficulty and cost, resulting in excellent economic benefits and practical application value.

[0077] In at least one embodiment, the first ridge 41 between two adjacent antenna modules 3 extends along a first direction that intersects a line connecting the centers of the two adjacent antenna modules 3. A line connecting any of the first openings 311 of two adjacent antenna modules 3 intersects the first ridge 41, and a line connecting any of the second openings 321 of two adjacent antenna modules 3 intersects the first ridge 41. This arrangement allows the first ridge 41 to block crosstalk between the antenna modules 3 while maintaining a simple structure, facilitating the fabrication of the first ridge 41 and the first groove 42.

[0078] It should be noted that the first direction only needs to intersect with the line connecting the centers of two adjacent antenna modules 3 , and this embodiment does not limit how the first direction specifically extends.

[0079] In one embodiment, the first direction may be Figure 4 The Z direction shown, ie, the first direction, is perpendicular to the line connecting the centers of the two antenna modules 3 .

[0080] In other embodiments, the first direction may also be an inclined straight line. In this case, one end of the first ridge 41 is close to one of the antenna modules 3 , and the other end is close to the other antenna module 3 .

[0081] 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 first ridge 41 may be arc-shaped and bend toward one of the antenna modules 3 .

[0082] 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 are not listed one by one in this embodiment.

[0083] It should be noted that the line connecting any point of the first openings 311 of two adjacent antenna modules 3 refers to the line connecting any point on one first opening 311 and any point on the other first opening 311 of the two adjacent first openings 311. The connecting line is not a real line but a virtual line drawn to describe the relative positional relationship.

[0084] In at least one embodiment, Figure 4 As shown, the cross section of the first ridge 41 is rectangular. Figure 5 As shown, the longitudinal cross-section of the first ridge 41 is rectangular. In other embodiments, the longitudinal cross-section of the first ridge 41 can also be semicircular, T-shaped, or other polygonal, and this embodiment is not limited thereto. The shape of the first groove 42 matches the shape of the first ridge 41 so that the first ridge 41 can be snapped into or inserted into the first groove 42.

[0085] Alternatively, if Figure 4 As shown, the shape of the first ridge 41 can be a straight line. Alternatively, the shape of the first ridge 41 can also be a curved line (such as an arc or a wavy line), which is not limited in this embodiment.

[0086] Optionally, in order to reduce the size of the gap between the first body 1 and the second body 2 , the first ridge 41 is located as completely as possible in the first groove 42 , that is, the first body 1 and the second body 2 fit together as closely as possible.

[0087] In one embodiment, the surface of the ridge structure abuts against the wall surface of the groove structure. When the isolation component 10 includes the first isolation structure 4, the surface of the first ridge 41 abuts against the wall surface of the first groove 42. With such an arrangement, while ensuring that the first ridge 41 is smoothly located in the first groove 42, the gap between the first ridge 41 and the wall surface of the first groove 42 can be further reduced, thereby further reducing the risk of electromagnetic waves leaking through the gap between the first ridge 41 and the wall surface of the first groove 42, thereby reducing the probability of crosstalk and electromagnetic coupling between two adjacent antenna modules 3 through the gap between the first ridge 41 and the wall surface of the first groove 42, further improving the accuracy and stability of signal transmission, and further improving the communication quality.

[0088] It should be noted that the surface of the first ridge 41 refers to the surface of the first ridge 41 located in the first groove 42. The number of surfaces of the first ridge 41 is the same as the number of groove wall surfaces of the first groove 42 and they are in one-to-one correspondence to improve the fit between the first ridge 41 and the first groove 42.

[0089] To reduce the impact of the ridge structure on antenna module 3, in at least one embodiment, the ridge structure is spaced apart from antenna module 3. When isolation assembly 10 includes first isolation structure 4, first ridge 41 is spaced apart from antenna module 3. That is, first ridge 41 is independent of first cavity 31 and first cavity opening 311, and is not connected or in contact with them. Therefore, first ridge 41 does not contribute to forming first cavity 31. This arrangement can reduce the impact of first ridge 41 on electromagnetic wave propagation within first cavity 31.

[0090] Optionally, the first groove 42 is independent of the antenna module 3, that is, the first groove 42 is not connected to the second cavity 32 and the second cavity opening 321, and the electromagnetic waves in the second cavity 32 will not directly propagate to the first groove 42 to prevent the first groove 42 from affecting the structure of the second cavity 32.

[0091] In one embodiment, Figures 1 to 6 As shown, a first isolation structure 4 is provided between two adjacent antenna modules 3 , that is, a first ridge 41 is provided between two adjacent antenna modules 3 . In this case, the first isolation structure 4 can be centrally provided between the two antenna modules 3 .

[0092] Optionally, when a first isolation structure 4 is provided between two adjacent groups of antenna modules 3, as shown in FIG. Figure 6 As shown, two adjacent groups of antenna modules 3 can be symmetrically arranged with the first isolation structure 4 as the center of symmetry. This arrangement ensures that the distance between the first isolation structure 4 and the two antenna modules 3 is the same, and the relative position relationship is also consistent. This ensures that the propagation paths and distribution states of the electromagnetic fields of the two antenna modules 3, after being modified by the first isolation structure 4, are the same or have very little difference. This ensures the consistency of the signals transmitted by the two antenna modules 3, reduces the amplitude of phase jitter of the first antenna module 3, and improves signal transmission quality.

[0093] In other embodiments, Figures 7 to 10 As shown, multiple first isolation structures 4 are provided between two adjacent antenna modules 3. That is, multiple first ridges 41 are provided between two adjacent antenna modules 3. The multiple first ridges 41 are arranged at intervals along the line connecting the two adjacent antenna modules 3. By providing multiple first ridges 41, the electromagnetic coupling between the antenna modules 3 can be further weakened to reduce or prevent crosstalk, ensure the accuracy and stability of signal transmission, and improve communication quality. In addition, by providing multiple first isolation structures 4, the degree of the antenna device's directivity pattern can be improved. Specifically, the degree of antenna device directivity pattern jitter can be reduced and the 0-degree gain can be increased.

[0094] Further optionally, the distance between two adjacent first ridges 41 is greater than or equal to 0.5 mm. In this way, processing requirements can be met, and the arrangement of the first isolation structure 4 has little effect on the structural strength of the first body 1 and the second body 2 .

[0095] It should be noted that the distance between two adjacent first grooves 42 is greater than or equal to 0.5 mm. For example, the distance between two adjacent first ridges 41 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, etc., which is not limited in this embodiment.

[0096] For example, Figures 7 to 10 A schematic diagram is given of three first isolation structures 4 provided between two adjacent antenna modules 3. The three first isolation structures 4 are provided between the two antenna modules 3 at equal intervals.

[0097] In at least one embodiment, Figures 11 to 14 As shown, the isolation assembly 10 includes a second isolation structure 5. The second isolation structure 5 is connected between the first body 1 and the second body 2. The second isolation structure 5 includes a second ridge 51 and a second groove 52. At least a portion of the second ridge 51 is located in the second groove 52. Figure 13 As shown, the second ridge 51 and the second groove 52 together form a closed area 53, and the first cavity 311 and the second cavity 321 are located within the closed area 53. This arrangement enables the cooperation of the second ridge 51 and the second groove 52 to form an effective electromagnetic barrier outside the first cavity 311 and the second cavity 321, 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. As a result, there is little or no leakage of electromagnetic waves escaping through the gap between the first body 1 and the second body 2, thereby ensuring the signal strength of the antenna device and thus ensuring the signal stability of the antenna device, improving the phase fluctuation of the antenna device, and also improving the zero-degree gain.

[0098] By providing the second isolation structure 5 , the crosstalk problem between the antenna modules 3 can be reduced, the coupling between the antenna modules 3 can be improved, and the coupling between the antenna modules 3 can even be suppressed to a greater extent.

[0099] In this embodiment, the closed area 53 formed by the second ridge 51 and the second groove 52 means that both the second ridge 51 and the second groove 52 are annular, and the closed area 53 may be closed at least in a direction perpendicular to the first body 1. In some optional embodiments, the closed area 53 may be a three-dimensional area, with the height of the closed area 53 being the height of the second ridge 51, the length of the closed area 53 being the length of the second ridge 51, and the width of the closed area 53 being the width of the second ridge 51.

[0100] In this embodiment, if Figure 11As shown, the second ridge 51 is a rectangular ring structure.

[0101] In other embodiments, the second ridge 51 may also be other polygonal ring structures (e.g., a triangular ring structure, a trapezoidal ring structure, etc.), a circular ring structure, an elliptical ring structure, a fan-shaped ring structure, etc. The specific shape of the second ridge 51 can be flexibly adjusted according to actual needs, and this embodiment does not limit the shape of the second ridge 51.

[0102] In this embodiment, the shape of the second groove 52 matches the shape of the second ridge 51 .

[0103] It should be noted that one or more second ridges 51 may be provided. When there is only one second ridge 51, a second isolation structure 5 is provided around the periphery of one antenna module 3 among the multiple antenna modules 3. When there are multiple second isolation structures 5, a second isolation structure 5 is provided around the periphery of at least two antenna modules 3 among the multiple antenna modules 3, or all antenna modules 3.

[0104] In one embodiment, each antenna module 3 is provided with multiple second isolation structures 5, that is, multiple second ridges 51 are provided. The multiple second ridges 51 are spaced apart from each other from the inside out, in a direction close to the antenna module 3 to the outside in a direction away from the antenna module 3. The second grooves 52 are provided in a one-to-one correspondence with the second ridges 51, and adjacent second ridges 51 are spaced apart from each other. In this arrangement, multiple second ridges 51 can be provided, with multiple annular second ridges 51 spaced apart in a direction away from the antenna module 3. In this case, multiple second grooves 52 are provided in a one-to-one correspondence with the second ridges 51, with each second ridge 51 being placed in its corresponding second groove 52. By providing multiple second isolation structures 5, energy escape can be further reduced, thereby further improving the radiation efficiency of the antenna device and ensuring signal strength. At the same time, the phase fluctuation of the antenna device is further improved, thereby increasing the zero-degree gain.

[0105] Optionally, in two adjacent second ridges 51 , the closed area 53 formed by the second ridge 51 and the second groove 52 close to the antenna module 3 is located within the closed area 53 formed by the second ridge 51 and the second groove 52 away from the antenna module 3 .

[0106] In one embodiment, the plurality of second ridges 51 may be concentrically arranged, in which case the antenna device has a more regular structure and facilitates the processing and manufacturing of the plurality of second ridges 51. Of course, it is understandable that the plurality of second ridges 51 may also be eccentrically arranged, and this embodiment does not limit this.

[0107] In this embodiment, the second ridge 51 is connected to one of the first body 1 and the second body 2 , and the second groove 52 is disposed in the other one. At least a portion of the second ridge 51 is located in the second groove 52 .

[0108] It should be noted that at least a portion of the second ridge 51 being located in the second groove 52 can be understood as at least a portion of the second ridge 51 being located in the second groove 52 in the height direction. For example, the entire second ridge 51 is located in the second groove 52, that is, the second ridge 51 is entirely located in the second groove 52. In this case, the second ridge 51 has no portion located outside the second groove 52. In this case, the gap between the first body 1 and the second body 2 is small, so that the provision of the second ridge 51 does not affect the surface-to-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. For another example, a portion of the second ridge 51 in the height direction is located in the second groove 52.

[0109] In order to make the second ridge 51 in the shape of an annular shape be able to extend into the second groove 52, as shown in FIG. Figure 12 As shown, the second groove 52 is annular. The shape of the second groove 52 matches the shape of the second ridge 51, allowing the second ridge 51 to extend into the second groove 52. When the second groove 52 is provided in the first body 1, the second groove 52 is provided around the periphery of the first cavity 31. When the second groove 52 is provided in the second body 2, the second groove 52 is provided around the periphery of the second cavity 32.

[0110] In one embodiment, Figure 11 As shown, when the second ridge 51 is annular, the second ridge 51 may be provided with one.

[0111] In some optional embodiments, when the second ridge 51 is provided on the first body 1, the second ridge 51 and the first body 1 are an integrated structure, thereby improving the integrity and connection strength of the second ridge 51 and the first body 1 and reducing the risk of separation.

[0112] Similarly, when the second ridge 51 is provided on the second body 2 , the second ridge 51 and the second body 2 are integrally formed into an integrated structure.

[0113] To enhance the electromagnetic wave shielding effect of the second ridge 51 and the second groove 52, in this embodiment, the surface of the second ridge 51 abuts against the groove wall of the second groove 52. For example, the side wall of the second ridge 51 facing the first cavity 31 abuts against the side wall of the second groove 52 facing the second cavity 32. The side wall of the second ridge 51 facing away from the first cavity 31 abuts against the side wall of the second groove 52 facing away from the second cavity 32. The top surface of the second ridge 51 abuts against the bottom surface of the second groove 52. This arrangement creates a very small gap between the side wall of the second ridge 51 and the side wall of the second groove 52, preventing electromagnetic waves that propagate through the gap between the first body 1 and the second body 2 from reentering the space between the second ridge 51 and the groove wall of the second groove 52. Instead, the leakage energy is redistributed under the guidance of the second ridge 51 and the second groove 52, thereby reducing the energy that escapes from between the first body 1 and the second body 2.

[0114] In some optional embodiments, the ridge structure is spaced apart from the antenna module 3. When the isolation assembly 10 includes a second isolation structure 5, the second ridge 51 is spaced apart from the antenna module 3, so that the setting of the second ridge 51 does not affect the specific structure of the radiation cavity of the antenna module 3.

[0115] In one embodiment, Figure 13 As shown, when the annular second ridge 51 and the linear first ridge 41 are both provided on the first body 1, the first ridge 41 may be located outside the annular region formed by the second ridge 51. Of course, it is understandable that the first ridge 41 may also be located within the annular region formed by the second ridge 51, and this embodiment is not limited thereto.

[0116] It should be noted that when the peripheries of two adjacent antenna modules 3 are both provided with a second isolation structure 5, as shown in FIG. Figure 13 As shown, the first ridge 41 of the first isolation structure 4 can be located between the second ridges 51 of the two second isolation structures 5. In other embodiments, the first ridge 41 can also be located in the annular region formed by any one of the two second ridges 51, which is not limited in this embodiment.

[0117] In at least one embodiment, Figure 5 、 Figure 10 or Figure 14 As shown, the antenna device further includes a plurality of radiation units 33. The plurality of radiation units 33 are provided on the second body 2. Figure 6 As shown, the radiation unit 33 forms a radiation port 331 on the surface of the second body 2 facing away from the first body 1, and the antenna module 3 forms a feed port 332 on the surface of the first body 1 facing away from the second body 2. Electromagnetic waves within the second cavity 32 of the second body 2 are radiated through the radiation unit 33 and the radiation port 331, or electromagnetic waves received by the radiation port 331 are propagated into the second cavity 32 through the radiation unit 33.

[0118] In other optional embodiments, the radiation unit 33 can also be set on the first body 1. In this case, the radiation unit 33 forms a radiation port 331 on the surface of the first body 1 facing away from the second body 2, and the antenna module 3 forms a feeding port 332 on the surface of the second body 2 facing away from the first body 1.

[0119] The antenna device provided in this embodiment has the advantages of reducing crosstalk between antenna modules 3, improving energy leakage, and high cost efficiency.

[0120] Specifically, the reduction of crosstalk between antenna modules 3 is mainly reflected in: by reasonably designing the structural parameters and arrangement of the first ridge 41, the first groove 42, the second ridge 51 and the second groove 52, the propagation path and distribution state of the electromagnetic field between the radiation strong points of the antenna modules 3 can be effectively changed, and the electromagnetic coupling between the antenna modules 3 can be significantly weakened, thereby greatly reducing the crosstalk phenomenon, improving the accuracy and stability of signal transmission, and enhancing the communication quality.

[0121] Energy leakage is primarily addressed by the following: The coordinated structure of the first ridge 41 and first groove 42, as well as the coordinated structure of the second ridge 51 and second groove 52, creates a special electromagnetic barrier at the interface between the first cavity 31 and the second cavity 32 to prevent energy leakage caused by machining errors between the first and second bodies 1 and 2. When energy leaks due to machining errors, the first and second isolation structures 4 and 5 redirect the leaked energy, reducing its escape, improving the antenna device's radiation efficiency, and enhancing signal strength, thus ensuring the system's normal operation.

[0122] The high cost-effectiveness is mainly reflected in the following: compared with the traditional method of solving the crosstalk and energy leakage problems through high-precision processing technology or complex structure optimization, the antenna device provided in this embodiment only needs to add a relatively simple first isolation structure 4 and second isolation structure 5 between the first body 1 and the second body 2, and the first isolation structure 4 includes a simple first ridge 41 and a first groove 42, and the second isolation structure 5 includes a simple second groove 52 and a second ridge 51. There is no need to make large-scale changes to the overall structure of the antenna device, which reduces the processing difficulty and cost, and has good economic benefits and practical application value.

[0123] Figure 15 The directional diagrams of two antenna devices according to one embodiment of the present application with different numbers of ridge structures added are shown below. The horizontal axis is the observation angle in degrees, and the vertical axis is the gain value in dB. Figure 15 As can be seen in the figure, when a 0.1mm gap appears between the first body 1 and the second body 2, the antenna device's 0-degree gain decreases significantly, and the overall pattern shifts approximately 5 degrees toward negative angles, with two noticeable dips appearing at small angles. The addition of ridge structures effectively mitigates this pattern shift and the appearance of these dips. Simulation results show that varying the number of ridge structures improves the pattern to varying degrees. A greater number of ridge structures reduces the antenna device's pattern jitter, increases its 0-degree gain, and approaches an ideal gap-free state.

[0124] Figure 16 Phase diagram of two antenna devices according to one embodiment of the present application with different numbers of ridge structures added; wherein the horizontal axis is the observation angle in degrees, and the vertical axis is the phase difference in degrees. Figure 16As can be seen in the figure, when a 0.1mm gap appears between the first body 1 and the second body 2 of the antenna device, the phase of the antenna device fluctuates violently, ranging from -20° to 25°. After adding the ridge structure, the phase jitter can be effectively controlled to -15° to 5°. Furthermore, the more ridge structures there are, the flatter the phase curve becomes.

[0125] Figure 17 This is a comparison diagram of the coupling degree of two antenna devices with different numbers of ridge structures added according to an embodiment of the present application. The horizontal axis is the frequency in Hz, and the vertical axis is the coupling degree in dB. Figure 17 As can be seen from the figure, when there is no gap between the first body 1 and the second body 2, the coupling degree deteriorates seriously, by nearly 30dB, when there is a 0.1mm gap between the first body 1 and the second body 2. The ridge structure between the first body 1 and the second body 2 can effectively improve the coupling degree between the antenna modules 3. Whether the first isolation structure 4 or the second isolation structure 5 is set between the first body 1 and the second body 2, the coupling degree is significantly improved. Figure 17 From the dotted lines and dashed lines in FIG, the more the number of the first isolation structures 4 is, the more obvious the effect of improving the coupling degree is; and, as shown in FIG. Figure 17 As shown, the second isolation structure 5 can suppress the coupling between antenna modules 3 to a greater extent. For antenna arrays, such a structure can also effectively improve the leakage of electromagnetic waves.

[0126] In summary, by adding a ridge structure between the first body 1 and the second body 2 of the antenna device and changing the number, height and arrangement of the ridge structure, the deterioration of the performance of the antenna device (such as the radiation pattern, phase and coupling degree, etc.) caused by the gap between the first body 1 and the second body 2 can be effectively alleviated, thereby improving the radar detection performance.

[0127] This embodiment further provides a radar system including the above antenna device. The radar system has high anti-crosstalk performance.

[0128] Note that the above are only preferred embodiments 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 that various obvious changes, readjustments, and substitutions can be made by those skilled in the art 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. An antenna device, characterized in that include: first ontology; a second body connected to the first body; A plurality of antenna modules are arranged at intervals, each of the antenna modules including a first cavity provided in the first body and a second cavity provided in the second body, the first cavity being in communication with the second cavity; The isolation component includes a ridge structure and a groove structure cooperating with the ridge structure, and the ridge structure and the groove structure are arranged between the first body and the second body; in the area between the first body and the second body, the projection of each antenna module onto any adjacent antenna module is completely blocked by the ridge structure.

2. The antenna device according to claim 1, wherein The first cavity includes a first cavity opening provided on a surface of the first body facing the second body, and a projection of the first cavity opening of each antenna module onto the first cavity opening of any adjacent antenna module is completely blocked by at least one ridge structure; The second cavity includes a second cavity opening provided on a surface of the second body facing the first body, and a projection of the second cavity opening of each antenna module onto the second cavity opening of any adjacent antenna module is completely blocked by at least one ridge structure.

3. The antenna device according to claim 2, wherein: The isolation component includes a first isolation structure, which includes a first ridge and a first groove; at least a portion of the first ridge is located in the first groove; the first ridge is arranged between adjacent antenna modules, and the first cavities of two adjacent antenna modules are isolated from each other by the first ridge, and the second cavities of two adjacent antenna modules are isolated from each other by the first ridge.

4. The antenna device according to claim 3, wherein: The first ridge between two adjacent antenna modules extends along a first direction, and the first direction intersects with a line connecting the centers of the two adjacent antenna modules; a line connecting any of the first cavity openings of two adjacent antenna modules intersects with the first ridge, and a line connecting any of the second cavity openings of two adjacent antenna modules intersects with the first ridge.

5. The antenna device according to claim 3, wherein The first ridge is provided on a surface of the first body facing the second body, and the first groove is provided on a surface of the second body facing the first body; Alternatively, the first ridge is provided on a surface of the second body facing the first body, and the first groove is provided on a surface of the first body facing the second body.

6. The antenna device according to claim 3, wherein: A plurality of first ridges are provided between two adjacent antenna modules, and the plurality of first ridges are arranged at intervals along a direction of a connection line between the two adjacent antenna modules.

7. The antenna device according to claim 6, wherein: The distance between two adjacent first ridges is greater than or equal to 0.5 mm.

8. The antenna device according to any one of claims 2 to 7, characterized in that: The isolation component includes a second isolation structure, which includes a second ridge and a second groove. At least a portion of the second ridge is located in the second groove. The second ridge and the second groove together form a closed area, and the first cavity opening and the second cavity opening are located in the closed area.

9. The antenna device according to claim 8, wherein: The second ridge is annular, and at least one second ridge is arranged around the first cavity and the second cavity of each antenna module.

10. The antenna device according to claim 8, wherein The second ridge is disposed on one of the first body and the second body, and the second groove is disposed on the other one.

11. The antenna device according to claim 8, wherein Each antenna module is correspondingly provided with a plurality of second ridges, and the plurality of second ridges are spaced apart from the inside to the outside along a direction close to the antenna module to a direction away from the antenna module, and the second grooves are provided in a one-to-one correspondence with the second ridges.

12. The antenna device according to claim 1, wherein The ridge structure is spaced apart from the antenna module.

13. The antenna device according to claim 1, wherein The surface of the ridge structure abuts against the groove wall surface of the groove structure.

14. The antenna device according to claim 1, wherein The height of the ridge structure is less than or equal to the groove depth of the groove structure.

15. The antenna device according to claim 1, wherein The antenna module further includes a radiation unit disposed on the second body. The radiation unit forms a radiation port on a surface of the second body facing away from the first body. The antenna module forms a feed port on a surface of the first body facing away from the second body.

16. A radar system, characterized in that The invention comprises the antenna device according to any one of claims 1 to 15.

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