Antenna device and radar system
By setting a first protrusion assembly on the antenna body, the problem of insufficient isolation in the antenna device is solved by utilizing the mutual cancellation phenomenon of electromagnetic waves between the protrusions. This achieves low coupling and improved signal crosstalk between antenna elements, thereby enhancing the performance of the radar system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 立晟智能科技(成都)有限公司
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-24
AI Technical Summary
Insufficient isolation between antennas in existing antenna devices leads to severe signal crosstalk, and existing improvement methods increase design and manufacturing costs and are difficult to implement effectively.
Multiple first protrusion assemblies are set on the antenna body, and first protrusion assemblies are set between adjacent radiating parts. Through phenomena such as reflection, refraction, and diffraction, electromagnetic waves cancel each other out between multiple first protrusions, reducing interference to other radiating parts and improving isolation.
It effectively improves the isolation between antenna elements, reduces signal crosstalk, and enhances the accuracy and reliability of the radar system.
Smart Images
Figure CN224554710U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of antenna technology, and in particular to an antenna device and radar system. Background Technology
[0002] An antenna device 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. It is commonly used in microwave communication systems, radar systems, and satellite systems.
[0003] In multi-antenna structures, insufficient isolation between antennas can cause signal crosstalk, severely interfering with the normal operation of the system. Related technologies require adjustments to the complex internal structure or feeding network of the antennas to reduce crosstalk. However, this approach increases design and manufacturing costs and is difficult to implement effectively, resulting in antenna devices still suffering from insufficient isolation and severe crosstalk. Utility Model Content
[0004] The first objective of this application is to provide an antenna device to solve the technical problems of insufficient isolation and severe crosstalk in the prior art.
[0005] The second objective of this application is to provide a radar system with high reliability and accuracy.
[0006] Based on the above concept, the technical solution adopted in this application is:
[0007] Antenna device, including:
[0008] An antenna body, wherein a plurality of antenna elements are spaced apart, and each antenna element forms a radiating part on the surface of the antenna body;
[0009] A first protrusion assembly is connected to the antenna body. The first protrusion assembly is provided between any two adjacent radiating parts. The first protrusion assembly includes a plurality of first protrusions arranged at intervals.
[0010] In one embodiment, the antenna device further includes a second boss assembly, the area on the periphery of the radiating portion where the first boss assembly is disposed is a first region, and the area on the periphery of the radiating portion other than the first region is a second region, and the second boss assembly is disposed in the second region;
[0011] The second boss assembly includes a plurality of spaced-apart second bosses, which are connected to the antenna body.
[0012] In one embodiment, the top surface of the second boss is flush with the plane where the radiating part is located; or, the top surface of the second boss is lower than the plane where the radiating part is located.
[0013] In one embodiment, the top surface of the first boss is flush with the plane where the radiating part is located; or, the top surface of the first boss is lower than the plane where the radiating part is located.
[0014] In one embodiment, a plurality of the first protrusions on one side of the radiating portion are arranged at equal intervals.
[0015] In one embodiment, a plurality of the first protrusions on one side of the radiating portion are arranged in multiple rows and columns, and the density of the first protrusions gradually decreases along the direction away from the radiating portion.
[0016] In one embodiment, at least a portion of a plurality of first bosses located on the same side of the radiating portion in the length direction are spaced apart along the width direction of the radiating portion;
[0017] And / or,
[0018] At least a portion of the plurality of first bosses located on the same side of the radiating portion in the width direction are spaced apart along the length direction of the radiating portion.
[0019] In one embodiment, the antenna body includes a body portion and a plurality of protrusions spaced apart on the same side of the body portion. The antenna elements correspond one-to-one with the protrusions, and the antenna elements form the radiating portion on the surface of the corresponding protrusion opposite to the body portion.
[0020] The first boss assembly is provided between two adjacent protrusions, and the first boss is spaced apart from the protrusions;
[0021] The first boss is connected to the body portion.
[0022] In one embodiment, the area where the first boss assembly is located between two adjacent radiating portions blocks the two adjacent radiating portions from each other.
[0023] A radar system, including the antenna assembly described above.
[0024] The beneficial effects of this application are:
[0025] The antenna body of the antenna device is provided with multiple radiating parts. A first protrusion assembly is provided between the radiating parts and adjacent radiating parts. Each first protrusion of the first protrusion assembly is connected to the antenna body, and the multiple first protrusions are spaced apart. When the electromagnetic waves radiated by the radiating parts propagate along a surface of the antenna body, they will come into contact with the first protrusions. Then, reflection, refraction, diffraction and other phenomena will occur between the multiple first protrusions. The arrangement of the first protrusions can effectively improve the electromagnetic environment around the radiating parts, so that the electromagnetic waves propagating between the multiple first protrusions can cancel each other out. There are very few or no electromagnetic waves reaching other radiating parts, thereby reducing the interference to the electromagnetic waves emitted by other radiating parts. This improves the isolation between radiating parts, that is, the coupling between antenna elements will be significantly reduced, effectively improving the problem of signal crosstalk, and also reducing the distribution of surface current.
[0026] Radar systems can achieve high accuracy and reliability. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the structure of the first antenna device provided in an embodiment of this application;
[0029] Figure 2 This is a top view of a second antenna device provided in an embodiment of this application;
[0030] Figure 3 This is a schematic diagram of the structure of a second antenna device provided in an embodiment of this application;
[0031] Figure 4 This is a first structural schematic diagram of a third antenna device provided in an embodiment of this application;
[0032] Figure 5 This is a top view of a fourth antenna device provided in an embodiment of this application;
[0033] Figure 6 This is a cross-sectional view of a third antenna device provided in an embodiment of this application;
[0034] Figure 7 This is a second structural schematic diagram of a third antenna device provided in an embodiment of this application;
[0035] Figure 8This is a phase simulation comparison diagram of an antenna device provided in one embodiment of this application;
[0036] Figure 9 This is a directional simulation comparison diagram of an antenna device provided in one embodiment of this application;
[0037] Figure 10 This is a simulation comparison diagram of the coupling degree of an antenna device provided in one embodiment of this application.
[0038] In the picture:
[0039] 1. Antenna body; 11. Body part; 12. Protrusion; 2. Antenna element; 21. Radiating part; 211. Radiating port; 22. Feed port; 3. First boss assembly; 31. First boss; 4. Second boss assembly; 41. Second boss. Detailed Implementation
[0040] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.
[0041] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in one embodiment" appearing throughout the specification does 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.
[0042] 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.
[0043] In the description of this application, unless otherwise expressly 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 application based on the specific circumstances.
[0044] In this application, unless otherwise expressly 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.
[0045] 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 the convenience 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 application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0046] 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.
[0047] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.
[0048] This embodiment provides an antenna device that can reduce crosstalk between antenna elements and improve the isolation between antenna elements.
[0049] Optionally, the antenna device can be an antenna device, which can be used in electronic devices such as radar systems. This embodiment does not limit this.
[0050] For example, such as Figure 1 As shown, the antenna device includes an antenna body and a first boss assembly. The first boss assembly is disposed on the antenna body.
[0051] The antenna body can be a plate-shaped structure, and the material of the antenna body can be metal, non-metal, etc. This embodiment does not limit this.
[0052] In this embodiment, as Figure 1As shown, multiple antenna elements 2 are spaced apart on the antenna body 1, and each antenna element 2 forms a radiating part 21 on one surface of the antenna body 1. The antenna elements 2 radiate electromagnetic waves into the air through the radiating part 21. By setting multiple antenna elements 2, the functionality of the antenna device can be enriched, and the application scenarios of the antenna device can be expanded.
[0053] In some alternative embodiments, the radiating element 21 may be composed of one or more radiating ports 211, each capable of radiating electromagnetic waves into the air. For example... Figure 1 As shown, each radiating element includes 6 radiating ports. Of course, it is understood that the radiating element 21 may also include 4, 5, 7, 8, etc., and this embodiment does not limit this.
[0054] In some optional embodiments, multiple radiating elements 21 are spaced apart on one surface of the antenna body 1. Each radiating element 21 has an adjacent radiating element 21, meaning that at least one side of a radiating element 21 will have another radiating element 21. In this embodiment, these two radiating elements 21 are referred to as adjacent radiating elements 21. It should be noted that the adjacent radiating elements 21 are arranged opposite each other in a specific direction, and are not limited to being arranged opposite each other in the length or width direction of the antenna body. The arrangement of the multiple radiating elements 2 can be flexibly adjusted according to actual needs, and this embodiment does not limit this.
[0055] For a given radiating part 21, there may be one or more radiating parts 21 adjacent to that radiating part 21, and this embodiment does not limit this.
[0056] like Figure 1 or Figure 2 As shown, in this embodiment, the first protrusion assembly 3 is connected to the antenna body 1. A first protrusion assembly 3 is provided between any two adjacent radiating portions 21. The first protrusion assembly 3 is used to reduce crosstalk between electromagnetic waves radiated from two adjacent radiating portions 21, thereby improving the isolation between antenna elements 2 and reducing the coupling between antenna elements 2.
[0057] In this embodiment, the first protrusion assembly 3 includes a plurality of spaced-apart first protrusions 31. All the first protrusions 31 are connected to the antenna body 1. When electromagnetic waves radiated from the radiating part 21 propagate to other radiating parts 21 along a direction perpendicular to the thickness of the antenna body 1, they can be blocked by the first protrusions 31, thereby improving the isolation between the radiating part 21 and other radiating parts 21.
[0058] The antenna device provided in this embodiment has an antenna body 1 with multiple radiating parts 21. A first protrusion assembly 3 is provided between each radiating part 21 and an adjacent radiating part 21. Each first protrusion 31 of the first protrusion assembly 3 is connected to the antenna body 1, and the multiple first protrusions 31 are spaced apart. When the electromagnetic waves radiated by the radiating parts 21 propagate along a surface of the antenna body 1, they will come into contact with the first protrusions 31. Reflection, refraction, diffraction and other phenomena will occur between the multiple first protrusions 31. The arrangement of the first protrusions 31 can effectively improve the electromagnetic environment around the radiating parts 21, so that the electromagnetic waves propagating between the multiple first protrusions 31 can cancel each other out. There are very few or no electromagnetic waves reaching other radiating parts 21, thereby reducing the interference to the electromagnetic waves emitted by other radiating parts 21. This improves the isolation between radiating parts 21, that is, the coupling between antenna elements 2 will be significantly reduced, effectively improving the problem of signal crosstalk, and also reducing the distribution of surface current.
[0059] In at least one embodiment, the area where the first boss assembly 3 is located between two adjacent radiating parts 21 blocks the two adjacent radiating parts 21 from each other, so that electromagnetic waves propagating from any position of one of the two adjacent radiating parts 21 can be blocked by the first boss assembly 3, thereby allowing a small amount or no electromagnetic waves to propagate to the other radiating part 21, thereby achieving the purpose of improving the isolation.
[0060] It should be noted that the region where the first protrusion assembly 3 is located between two adjacent radiating sections 21 isolates the two adjacent radiating sections 21 from each other can also be understood as the orthographic projection of the line connecting any point on one radiating section 21 to any point on the other radiating section 21 onto the antenna body 1 intersecting the region where the first protrusion assembly 3 is located. In this embodiment, the region where the first protrusion assembly 3 is located can refer to the closed region formed by the interconnection of the first protrusions 31 located at the edge of the first protrusion assembly 3.
[0061] In this embodiment, two adjacent radiating portions 21 can be arranged facing each other (e.g., opposite each other in the length or width direction of the antenna body 1) or they can be arranged diagonally opposite each other (e.g., opposite each other in the diagonal direction of the antenna body 1).
[0062] In at least one embodiment, when two adjacent radiating sections 21 are arranged facing each other, such as Figure 1As shown, the length of the longest of the two adjacent radiating portions 21 in the width direction is L1, and the length of the first boss assembly 3 located between the two adjacent radiating portions 21 is L2, where L2 is greater than or equal to L1, so as to ensure that the first boss assembly 3 can completely block the two adjacent radiating portions 21. When the two adjacent radiating portions 21 are aligned, the lengths of the two radiating portions 21 are equal.
[0063] In one possible implementation, when two adjacent radiating sections 21 are arranged facing each other, such as Figure 5 As shown, the width of the radiating part 21 with the largest width among two adjacent radiating parts 21 along its length is D1, and the width of the first boss assembly 3 located between the two adjacent radiating parts 21 is D2, where D2 is greater than or equal to D1, to ensure that the first boss assembly 3 can completely block the two adjacent radiating parts 21. When the two adjacent radiating parts 21 are aligned, the widths of the two radiating parts 21 are equal.
[0064] It should be noted that the area where the antenna body 1 is provided with the first protrusion assembly 3 can be referred to as the first region Q1. The first region Q1 can also be considered as the area around the radiating part 21 where the first protrusion assembly 3 is provided. In this embodiment, the first region Q1 can be understood as the area formed by the interconnection of the edges of the first protrusions 31 located at the edge.
[0065] In at least one possible implementation, such as Figures 1 to 4 As shown, the antenna body 1 includes a body portion 11 and a plurality of protrusions 12 disposed on the same side of the body portion 11. Antenna elements 2 correspond one-to-one with the protrusions 12, and the antenna elements 2 form a radiating portion 21 on the surface of the corresponding protrusion 12 facing away from the body portion 11.
[0066] like Figure 1 As shown, a first boss assembly 3 is provided between two adjacent protrusions 12, and the radiating part 21 is located on the protrusion 12, thus realizing that a first boss assembly 3 is provided between two adjacent radiating parts 21.
[0067] In this embodiment, the first boss 31 is connected to the body portion 11, that is, the first boss 31 is connected to the area of the body portion 11 where the protrusion 12 is not provided.
[0068] Since electromagnetic waves from the radiating part 21 have a certain effect when propagating in a direction perpendicular to the plane where the radiating part 21 is located and in a direction with a certain angle to the radiating part 21, the first protrusion 31 exceeding the plane where the radiating part 21 is located too high will affect the propagation of this part of the electromagnetic waves, thereby affecting the phase of the antenna element 2 and causing the sound phase to deteriorate.
[0069] In this embodiment, by providing the protrusion 12 and the radiating part 21 disposed on the protrusion 12, the difference between the top surface of the first protrusion 31 and the plane where the radiating part 21 is located is not too large. That is, the first protrusion 31 will not extend too far beyond the plane where the radiating port 211 is located. Therefore, the risk of complex reflections of electromagnetic waves above and diagonally above the radiating part 21 can be reduced, and the phase will not be severely degraded. This ensures that the radiation pattern of the antenna device will not fluctuate significantly and can also improve the zero-degree gain of the antenna device. It can be seen that the cooperation between the protrusion 12 and the first protrusion 31 can improve the antenna phase to a certain extent while ensuring the antenna gain and radiation pattern.
[0070] In at least one embodiment, the first protrusion 31 and the protrusion 12 are spaced apart. This arrangement allows a resonant cavity to be formed between the first protrusion 31 and the protrusion 12, which is beneficial for suppressing surface current and also for the reflection cancellation effect when electromagnetic waves propagate between the protrusion 12 and the protrusion. The spacing between the first protrusion 31 and the protrusion 12 can be set according to actual needs, and this embodiment does not limit it.
[0071] In at least one implementation, such as Figure 6 As shown, the top surface of the first protrusion 31 is flush with the plane where the radiating part 21 is located; that is, the height of the first protrusion 31 is the same as the height of the protrusion 12. With this arrangement, the protrusion 12 can make the plane where the radiating part 21 is located and the top surface of the first protrusion 31 the same level. Without deteriorating the antenna pattern, the protrusion 12 and the first protrusion 31 together form a resonant cavity, so that the surface current is confined within the first protrusion 31. At the same time, the electromagnetic waves reflect and cancel each other between the first protrusions 31 and between the first protrusion 31 and the protrusion 12, thereby improving the phase of the antenna device to a certain extent. Furthermore, due to the arrangement of the protrusion 12, the isolation between the antenna elements 2 can be further improved and the coupling between the antenna elements 2 can be reduced.
[0072] In other possible implementations, the top surface of the first boss 31 may be lower than the plane where the radiating part 21 is located; this embodiment does not limit this.
[0073] It should be noted that having the top surface of the first protrusion 31 flush with or lower than the plane of the radiating part 21 can improve the isolation between antenna elements 2 without reducing the antenna device gain, thus meeting diverse application requirements. Furthermore, after the antenna device gains are improved through other means, the interaction between the protrusion 12 and the first protrusion 31 can also mitigate phase degradation of the antenna device by using the first protrusion 31. If the top surface of the first protrusion 31 is higher than the plane of the radiating part 21, the phase of the antenna device will significantly deteriorate.
[0074] Alternatively, the shape of the protrusion 12 can be matched with the shape of the radiating part 21 so that the size of the protrusion 12 does not occupy a large space.
[0075] In some embodiments, such as Figure 1 As shown, the cross-sectional shape of the protrusion 12 is rectangular. In other embodiments, the cross-sectional shape of the protrusion 12 can also be a square, triangle, trapezoid, or other polygon, or a regular shape such as a circle or ellipse, or an irregular shape such as a fan. This embodiment does not limit this.
[0076] In one embodiment, the plurality of first protrusions 31 on one side of the radiating portion 21 are arranged in multiple rows and columns, that is, the plurality of first protrusions 31 on the same side of the radiating portion 21 are arranged in multiple layers. Furthermore, the plurality of first protrusions 31 on the same side of the radiating portion 21 are arranged at equal intervals. Thus, the arrangement of the first protrusions 31 is relatively regular, and by adjusting the spacing between the first protrusions 31, the phase cancellation of electromagnetic waves propagating between the first protrusions 31 can be maximized, thereby improving crosstalk between the ground units. Optionally, in this embodiment, the equal-interval arrangement of the plurality of first protrusions 31 can also be referred to as the periodic arrangement of the first protrusions 31, that is, the first protrusions 31 are repeatedly arranged at a certain period.
[0077] It should be noted that the equal spacing of the plurality of first protrusions 31 in the first protrusion assembly 3 can mean that they are equally spaced along the length of the radiating part 21, or equally spaced along the width of the radiating part 21, or equally spaced along both the length and width of the radiating part 21. This embodiment does not limit this.
[0078] It is understandable that the multiple first protrusions 31 located on the same side of the radiating part 21 can also be arranged in a single layer, and this embodiment does not limit this.
[0079] In one implementation, such as Figures 1 to 4 As shown, the plurality of first protrusions 31 of the first protrusion assembly 3 are arranged in an array along the length and width directions of the antenna body 1. This arrangement aligns the plurality of first protrusions 31 along the length and width directions of the antenna body 1, resulting in a neater arrangement of the protrusions 31. This reduces crosstalk between antenna elements 2 and facilitates the manufacturing of the first protrusions 31. For example, the spacing between the first protrusions 31 is 1.4mm, 1.5mm, 1.3mm, etc., and can be adjusted according to the application scenario.
[0080] In other embodiments, the first protrusions 31 may not be evenly spaced, but rather unequally spaced. Optionally, the plurality of first protrusions 31 on one side of the radiating portion 21 are arranged in multiple rows and columns, and the density of the first protrusions 31 gradually decreases along the direction away from the radiating portion 21, that is, the spacing between two adjacent first protrusions 31 gradually increases along the direction away from the radiating portion 21. Here, the density of the first protrusions 31 refers to the number of first protrusions 31 per unit area. This arrangement makes the first protrusions 31 more densely packed closer to the radiating portion 21, so as to better confine the surface current within the first protrusions 31, and the reflection cancellation effect of electromagnetic waves between the first protrusions 31 is better, thereby improving the isolation between antenna elements 2 and reducing the crosstalk and coupling between adjacent antenna elements 2.
[0081] In one embodiment, the gradual increase in the spacing between two adjacent first protrusions 31 along the direction away from the radiating portion 21 can be: the spacing between two adjacent first protrusions 31 gradually increases along the direction away from the radiating portion 21 in a direction perpendicular to the axis of the radiating portion 21.
[0082] In other embodiments, the interval between two adjacent first protrusions 31 gradually increases along the direction away from the radiating portion 21, which can be: the interval between two adjacent first protrusions 31 gradually increases along the length or width direction of the radiating portion 21.
[0083] In another embodiment, the interval between two adjacent first protrusions 31 gradually increases along the direction away from the radiating portion 21, which can be as follows: along the direction away from the radiating portion 21, the interval between two adjacent first protrusions 31 gradually increases in the direction perpendicular to the axis of the radiating portion 21, and the interval between two adjacent first protrusions 31 gradually increases in the length or width direction of the radiating portion 21.
[0084] It is understandable that the multiple first protrusions 31 can be arranged non-uniformly according to a specific radiation pattern optimization algorithm. Combined with the setting of the protrusions 12, this can improve the phase, increase the gain, change the radiation pattern shape, and optimize other performance aspects. In the structure of multiple antenna elements 2, the arrangement of the first protrusions 31 can also be optimized according to the relative position and interference situation between the antenna elements 2 to improve the isolation between the antenna elements 2.
[0085] Optionally, the first protrusion 31 and the antenna body 1 can be an integral structure. Both the antenna body 1 and the first protrusion 31 can be made of metal, and the first protrusion 31 can be formed on the antenna body 1 by machining. Of course, it is understood that the first protrusion 31 and the antenna body 1 can also be a separate structure, that is, the first protrusion 31 can be formed on the antenna body 1 by welding or riveting, etc., and this embodiment does not limit this.
[0086] In one embodiment, such as Figure 5 or Figure 6 As shown, the first boss 31 is in the shape of a cuboid.
[0087] In other embodiments, the shape of the first boss 31 can also be a cube, cone, cylinder, pyramid, prism, frustum, sphere, etc. In this embodiment, the shape of the first boss 31 is not limited and can be selected according to the requirements.
[0088] In at least one possible implementation, such as Figure 3 As shown, the radiating port 211 can be stepped, that is, the aperture of the radiating port 211 varies along the axial direction. This arrangement can effectively increase the radiation gain of the antenna device.
[0089] In other embodiments, the radiating port 211 may also be flared, which can also increase the radiation gain of the antenna device.
[0090] Optionally, a waveguide cavity (not shown in the figure) is provided inside the antenna body 1, and the waveguide cavity extends to one surface of the antenna body 1 to form a radiating part 21, such as... Figure 7 As shown, the waveguide cavity extends to another surface of the antenna body 1 to form a feed port 22. Energy is transferred from the feed port 22 into the waveguide cavity and then radiated into the air through the radiation port 211 of the radiating part 21. It can be understood that each antenna element 2 consists of a waveguide cavity, and each waveguide cavity may include a power divider feed line. The power divider feed line has multiple ends, each of which corresponds one-to-one with a plurality of radiation ports 211 of the radiating part 21. Electromagnetic waves at each end can be radiated into the air through the corresponding radiation port 211.
[0091] When the radiating part 21 is located at the edge of the antenna body 1, or when the radiating part 21 is designed, there is a situation where the radiating part 21 is not adjacent to other radiating parts 21, the second boss assembly 4 can also be provided.
[0092] In at least one possible implementation, such as Figure 2 As shown, the antenna assembly also includes a second protrusion assembly 4. The area surrounding the radiating portion 21, excluding the first region Q1, is the second region Q2, and the second protrusion assembly 4 is disposed in the second region. Figure 2 The thick dashed line in the diagram represents the first region Q1, and the thin dashed line represents the second region Q2.
[0093] It is understood that the periphery of the radiating part 2 may also be provided with multiple first regions Q1, and this embodiment does not limit this. The periphery of the radiating part 2 may be provided with one or more second regions Q2, or it may not be provided with second regions Q2. The specific choice can be made according to the requirements, and this embodiment does not limit this.
[0094] In one embodiment, such as Figure 2 As shown, a first region Q1 and a second region Q2 are provided on the periphery of the radiating part 21, and the second region Q2 can be in a semi-enclosed structure.
[0095] Please continue reading Figure 2 The second protrusion assembly 4 includes multiple spaced-apart second protrusions 41, each connected to the antenna body 1. In this embodiment, the second protrusions 41 and the first protrusions 31 are located on the same side of the antenna body 1. By providing the second protrusion assembly 4, in conjunction with the first protrusion assembly 3 and the protrusion 12, the phase fluctuation of the antenna device can be further reduced, thereby further improving the phase of the antenna device. Furthermore, this does not affect the gain of the antenna device, ensuring that the phase is further improved while maintaining the same gain. This results in better improvement of the angular measurement performance of the radar using the antenna device. Additionally, it also allows the antenna device to have better coupling.
[0096] It should be noted that when the radiating part 21 is surrounded by the first boss assembly 3 on all its periphery, the radiating part 21 may not have a second region Q2 on its periphery, that is, the radiating part 21 may not have a corresponding second boss assembly 4. Therefore, not all radiating parts 21 include the second region Q2 on their periphery; this embodiment does not impose this limitation.
[0097] In one possible implementation, such as Figure 2 As shown, the shape of the second region Q2 can be a horizontal U-shape, a long strip, a square, etc., and can be adjusted according to the setting position. This embodiment does not limit this.
[0098] Optionally, each second region Q2 is provided with at least one second boss assembly 4, but this embodiment is not limited to this. For ease of understanding, in this embodiment, each second region Q2 is provided with one second boss assembly 4.
[0099] In one embodiment, the first region Q1 and the second region Q2 can be adjacent or spaced apart; this embodiment does not limit this. Figure 2 This is a schematic diagram showing the spacing between the first region Q1 and the second region Q2.
[0100] It should be noted that the first boss assembly 3 and the second boss assembly 4 cooperate with each other and with the protrusion 12 to improve the phase of the antenna device. However, the first boss assembly 3 also has the function of improving the isolation between the antenna elements 2 compared with the second boss assembly 4.
[0101] In this embodiment, the specific structure of the second protrusion 41 can be exactly the same as the specific structure of the first protrusion 31. That is, the shape of the second protrusion 41 is a cuboid, cube, cone, cylinder, pyramid, prism, frustum, sphere, etc.
[0102] In this embodiment, the arrangement of the plurality of second protrusions 41 can be in the same direction as the arrangement of the plurality of first protrusions 31. For example, the plurality of second protrusions 41 can be arranged at equal intervals in the second region Q2, or they can be arranged at unequal intervals in the second region Q2. When the plurality of second protrusions 41 are arranged at unequal intervals, the second protrusions 41 can be more densely packed closer to the radiating part 21, and the density of the second protrusions 41 gradually decreases along the direction away from the radiating part 21.
[0103] In at least one implementation, such as Figure 6 As shown, the top surface of the second protrusion 41 is flush with the plane where the radiating part 21 is located. That is, the height of the second protrusion 41 can be equal to the height of the protrusion 12. With this arrangement, the protrusion 12 can make the plane where the radiating part 21 is located and the top surface of the first protrusion 31 the same level. Without deteriorating the antenna pattern, the protrusion 12 and the first protrusion 31 together form a resonant cavity, so that the surface current is confined within the first protrusion 31. At the same time, electromagnetic waves are reflected and canceled between the first protrusions 31 and between the first protrusion 31 and the protrusion 12.
[0104] In at least one embodiment, at least a portion of the plurality of protrusions located on the same side of the radiating portion 21 in the length direction are spaced apart along the width direction of the radiating portion 21. That is, the protrusions located on one side of the radiating portion 21 in the length direction are not a continuous structure, but a discontinuous structure, so that when electromagnetic waves propagating from the radiating portion 21 propagate along the length direction of the radiating portion 21, reflection, refraction, diffraction, and other phenomena can occur between the protrusions, thereby reducing the impact on other adjacent radiating portions 21 in the length direction. In this embodiment, the length direction of the radiating portion 21 can be understood as the arrangement direction of the plurality of radiation ports 211 of the radiating portion 21, and the width direction of the radiating portion 21 is perpendicular to the length direction of the radiating portion 21 and perpendicular to the depth direction of the radiation ports 211.
[0105] It should be noted that the multiple bosses located on the same side of the radiating portion 21 in the longitudinal direction specifically refer to the same side of the radiating portion 21, not the same side in the longitudinal direction. For example, in Figure 2 In the orientation shown, the length direction of the radiating part 21 is the vertical direction, and the multiple protrusions located on the same side of the radiating part 21 in the length direction specifically refer to the protrusions located on the upper or lower side of the radiating part 21.
[0106] In one embodiment, all bosses located on the same side of the radiating portion 21 in the length direction can be spaced apart along the width direction of the radiating portion 21. In other embodiments, some bosses located on the same side of the radiating portion 21 in the length direction can be spaced apart along the width direction of the radiating portion 21, and other bosses can be spaced apart along the length direction of the radiating portion 21. The specific arrangement can be adjusted according to requirements, and this embodiment does not limit this.
[0107] It should be noted that the plurality of protrusions located on the same side of the radiating portion 21 in the length direction can refer to either the first protrusion 31 or the second protrusion 41. For example, at least a portion of the plurality of first protrusions 31 located on the same side of the radiating portion 21 in the length direction are spaced apart along the width direction of the radiating portion 21. At least a portion of the plurality of second protrusions 41 located on the same side of the radiating portion 21 in the length direction are spaced apart along the width direction of the radiating portion 21.
[0108] In one possible implementation, at least a portion of the plurality of protrusions located on the same side of the radiating portion 21 in the width direction are spaced apart along the length direction of the radiating portion 21. That is, the protrusions located on one side of the radiating portion 21 in the width direction are not a continuous structure, but a discontinuous structure, so that when the electromagnetic waves propagating from the radiating portion 21 propagate along the width direction of the radiating portion 21, reflection, refraction, diffraction and other phenomena can occur between the protrusions, thereby reducing the impact on other adjacent radiating portions 21 in the width direction.
[0109] It should be noted that the multiple bosses located on the same side of the radiating portion 21 in the width direction specifically refer to the same side of the radiating portion 21, not the same side in the width direction. For example, in Figure 2 In the orientation shown, the width direction of the radiating part 21 is the left-right direction, and the multiple protrusions located on the same side of the radiating part 21 in the width direction specifically refer to the protrusions located on the left or right side of the radiating part 21.
[0110] Similarly, the plurality of protrusions located on the same side in the width direction of the radiating portion 21 can be either first protrusions 31 or second protrusions 41. For example, at least a portion of the plurality of first protrusions 31 located on the same side in the width direction of the radiating portion 21 are spaced apart along the length direction of the radiating portion 21; at least a portion of the plurality of second protrusions 41 located on the same side in the width direction of the radiating portion 21 are spaced apart along the length direction of the radiating portion 21.
[0111] It should be noted that, in one embodiment, all the protrusions located on the same side of the radiating portion 21 in the width direction can be spaced apart along the length direction of the radiating portion 21. In other embodiments, some of the protrusions located on the same side of the radiating portion 21 in the width direction can be spaced apart along the length direction of the radiating portion 21, and other protrusions can be spaced apart along the width direction of the radiating portion 21. The specific arrangement can be adjusted according to requirements, and this embodiment does not limit this.
[0112] This embodiment also provides a radar system, including the antenna device described above. The radar system provided in this embodiment has a simpler structure and improves the reliability and accuracy of the signal.
[0113] Figure 8 This is a phase comparison diagram of the antenna device provided in this embodiment. Figure 8 The horizontal axis represents the observation angle in degrees, and the vertical axis represents the phase difference in degrees. Figure 8 The solid lines in the diagram represent the phase simulation diagram when the antenna device has a first boss assembly 3, a second boss assembly 4, and a protrusion 12. Figure 8 The dotted lines in the diagram represent the phase simulation diagram when the antenna device has a first boss assembly 3, a second boss assembly 4, and no protrusion 12. Figure 8 The short dashed line in the diagram represents the phase simulation diagram when the antenna device has the first protrusion assembly 3, has no second protrusion assembly 4, and has no protrusion 12. Figure 8 The long dashed line in the diagram represents the phase simulation diagram when the antenna device has no first protrusion assembly 3, no second protrusion assembly 4, and no protrusion 12.
[0114] from Figure 8 As can be seen, the phase curve is worst when the antenna device does not have the first protrusion assembly 3, the second protrusion assembly 4, and the protrusion 12. The phase curve is best when the antenna body 1 includes both the protrusion 12 and the first protrusion assembly 3 and the second protrusion assembly 4, especially within ±60°. The phase curve of the antenna device with the first protrusion assembly 3 is better than that without it. Figure 8 It can also be seen that the second boss component 4 has a relatively small impact on the phase.
[0115] Figure 9 A comparison of the radiation patterns of the antenna device provided in this embodiment. Among them, Figure 9 The horizontal axis represents the observation angle in degrees, and the vertical axis represents the gain value in dB. Figure 9 The solid lines in the diagram represent the radiation pattern of the antenna device when it has a first boss assembly 3, a second boss assembly 4, and a protrusion 12. Figure 9 The dotted lines in the diagram represent the radiation pattern of the antenna device when it has a first boss assembly 3, a second boss assembly 4, and no protrusion 12. Figure 9 The short dashed line in the diagram represents the radiation pattern of the antenna device when it has the first boss assembly 3, has no second boss assembly 4, and has no protrusion 12. Figure 9 The long dashed line in the diagram represents the radiation pattern of the antenna device when there is no first boss assembly 3, no second boss assembly 4, and no protrusion 12.
[0116] from Figure 9 As can be seen, the arrangement of the first boss assembly 3, the second boss assembly 4, and the protrusion 12 has little impact on the shape of the radiation pattern and the 0-degree gain, and will not cause the radiation pattern to deteriorate.
[0117] Figure 10 This section compares the coupling degree of the antenna device provided in this embodiment. The horizontal axis represents frequency in Hz, and the vertical axis represents coupling degree in dB. Figure 10 The solid lines in the diagram represent the coupling degree when the antenna device has a first boss assembly 3, a second boss assembly 4, and a protrusion 12. Figure 10 The dotted lines in the diagram represent the coupling degree when the antenna device has a first boss assembly 3, a second boss assembly 4, and no protrusion 12. Figure 10 The short dashed line in the diagram represents the coupling degree when the antenna device has the first boss assembly 3, has no second boss assembly 4, and has no protrusion 12. Figure 10 The long dashed line in the diagram represents the coupling degree when the antenna device has no first boss assembly 3, no second boss assembly 4, and no protrusion 12.
[0118] from Figure 10 As can be seen, the coupling is best when the antenna device has the first protrusion assembly 3, the second protrusion assembly 4, and the protrusion 12; the coupling is high but the isolation is poor when there is no first protrusion assembly 3, no second protrusion assembly 4, and no protrusion 12. The coupling is better when the antenna device has the first protrusion assembly 3 than when it does not. Furthermore, the coupling is better when the antenna device has the first protrusion assembly 3 and the second protrusion assembly 4 is provided than when it does not.
[0119] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application 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 this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application. The scope of this utility model is determined by the scope of the appended claims.
Claims
1. An antenna device, characterized in that, include: An antenna body, wherein a plurality of antenna elements are spaced apart, and each antenna element forms a radiating part on the surface of the antenna body; A first protrusion assembly is connected to the antenna body. The first protrusion assembly is provided between any two adjacent radiating parts. The first protrusion assembly includes a plurality of first protrusions arranged at intervals.
2. The antenna device according to claim 1, characterized in that, The antenna device further includes a second protrusion assembly. The area around the radiating part where the first protrusion assembly is disposed is a first region, and the area around the radiating part other than the first region is a second region. The second protrusion assembly is disposed in the second region. The second boss assembly includes a plurality of spaced-apart second bosses, which are connected to the antenna body.
3. The antenna device according to claim 2, characterized in that, The top surface of the second protrusion is flush with the plane where the radiating part is located; or, the top surface of the second protrusion is lower than the plane where the radiating part is located.
4. The antenna device according to claim 1, characterized in that, The top surface of the first protrusion is flush with the plane where the radiating part is located; or, the top surface of the first protrusion is lower than the plane where the radiating part is located.
5. The antenna device according to claim 1, characterized in that, The first protrusions on one side of the radiating part are arranged at equal intervals.
6. The antenna device according to claim 1, characterized in that, The first protrusions on one side of the radiating part are arranged in multiple rows and columns, and the density of the first protrusions gradually decreases along the direction away from the radiating part.
7. The antenna device according to claim 1, characterized in that, At least a portion of the plurality of first bosses located on the same side of the radiating portion in the length direction are spaced apart along the width direction of the radiating portion; And / or, At least a portion of the plurality of first bosses located on the same side of the radiating portion in the width direction are spaced apart along the length direction of the radiating portion.
8. The antenna device according to claim 1, characterized in that, The antenna body includes a body portion and a plurality of protrusions spaced apart on the same side of the body portion. The antenna elements correspond one-to-one with the protrusions, and the antenna elements form the radiating portion on the surface of the corresponding protrusion that is away from the body portion. The first boss assembly is provided between two adjacent protrusions, and the first boss is spaced apart from the protrusions; The first boss is connected to the body portion.
9. The antenna device according to claim 8, characterized in that, The area where the first boss assembly is located between two adjacent radiating sections isolates the two adjacent radiating sections from each other.
10. A radar system, characterized in that, Includes the antenna device as described in any one of claims 1-9.