Antenna components

Abstract

The embodiment of the present invention discloses an antenna assembly, which uses a common grounding portion to provide grounding for a first radiating portion and a second radiating portion, and arranges the second radiator and the first grounding pattern on the same side of a substrate. Thus, on the one hand, the second radiator and the first grounding pattern are arranged at intervals to form a first coupling gap, and the first feeding branch node and the second feeding branch node are arranged in the first coupling gap. Thereby, the coupling strength between the first grounding pattern and the main radiating unit, the diversity radiating unit and the second radiator is improved. On the other hand, the distances between the feeding point and the first side edge and the second side edge are configured to be different, and the first side edge and the second side edge have an angle. This causes a potential difference to be generated in the guided electromagnetic waves on the first side edge and the second side edge, and at the same time, after the two are superimposed on each other, they are coupled to the second radiator to generate a circularly polarized electromagnetic signal. The communication requirements between the antenna assembly and the satellite are met, so that the first radiating portion can be used to position the antenna assembly.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an antenna assembly. Background Art

[0002] MIMO system is also called multiple-input multiple-output system. MIMO antenna can effectively suppress signal fading, increase the utilization rate of antenna to the working frequency band, and reduce the error rate of information transmission. With the continuous development of Internet of Vehicles technology, the vehicle system needs to meet the needs of users for remote control of vehicles and satellite communications, so as to realize the system upgrade of the vehicle or locate the current position. How to integrate multiple antennas while reducing the space occupied by the antenna and improving the radiation efficiency has become a problem that needs to be solved. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides an antenna assembly that uses a common grounding portion to ground the first radiating portion and the second radiating portion at the same time, thereby reducing the space occupied by the antenna assembly and improving the radiation efficiency of the first radiating portion and the second radiating portion.

[0004] The antenna assembly of the embodiment of the present invention comprises:

[0005] substrate;

[0006] The first radiating portion includes a first radiator and a second radiator arranged opposite to each other, the first radiator is spaced apart from the substrate and coupled with the second radiator, the first radiator has a first side, a second side and a feeding point, the distances from the feeding point to the first side and the second side are set differently, and the first side and the second side have different extension directions;

[0007] a second radiating portion, arranged on the substrate and comprising a main radiating unit and a diversity radiating unit opposite to each other, wherein the main radiating unit comprises a first feeding branch, and the diversity radiating unit comprises a second feeding branch; and

[0008] A common grounding portion includes a first grounding pattern, wherein the first grounding pattern and the second radiator are arranged on the same side of the substrate, the first grounding pattern and the second radiator are spaced apart and a first coupling gap is formed on the opposite sides, at least part of the first feed branch and at least part of the second feed branch are arranged in the first coupling gap, wherein the first feed branch, the second feed branch and the second radiator are coupled to the first grounding pattern through the first coupling gap.

[0009] Furthermore, the main radiating unit further includes a third radiator, and the diversity radiating unit further includes a fourth radiator, and the third radiator and the fourth radiator are respectively located on both sides of the common grounding portion;

[0010] One end of the first feeding branch extends to the outside of the first coupling slot and is connected to the third radiator, and one end of the second feeding branch extends to the outside of the first coupling slot and is connected to the fourth radiator.

[0011] Further, the first coupling slot includes two first extension segments and two second extension segments, the two second extension segments are located on both sides of the first radiator, and the two first extension segments extend from the two second extension segments to the third radiator and the fourth radiator respectively;

[0012] The first extension section and the second extension section are parallel to the first side edge and the second side edge respectively, and the first extension section and the second extension section are vertically connected.

[0013] Further, the first radiator is rectangular and has two first sides and two second sides, and the feeding point is staggered from the center of the first radiator;

[0014] The first coupling slot also includes a third extension segment, which is connected between the two second extension segments and is parallel to the first side. The first coupling slot is arranged around a portion of the first radiator.

[0015] Further, the first feeding branch has a first feeding end and a first connecting end, and the second feeding branch has a second feeding end and a second connecting end;

[0016] The first feeding end and the second feeding end are located in the third extension section and are spaced apart from each other. The first connecting end and the second connecting end extend to the outside of the first extension section and are connected to the third radiator and the fourth radiator respectively.

[0017] Furthermore, the common grounding portion further includes a second grounding pattern, the second grounding pattern has a second coupling gap and is arranged on a side of the substrate away from the first grounding pattern;

[0018] The first radiating portion further includes a third feeding branch, which is arranged on a side of the substrate away from the first ground pattern and located in the second coupling slot. The third feeding branch is coupled to the second coupling slot and is electrically connected to the first radiator.

[0019] Furthermore, the third feeding branch has a third feeding end and a third connecting end, the third connecting end is electrically connected to the first radiator, and at least a portion of the third feeding end corresponds to the third extension section and is located between the first feeding branch and the second feeding branch.

[0020] Further, the first feeding branch has a first feeding end, the second feeding branch has a second feeding end, the first feeding end and the second feeding end are arranged on the third extension section, and the first feeding end and the second feeding end are located on both sides of the third feeding end and close to the third feeding end;

[0021] The first ground pattern includes a ground branch, and the ground branch and the opposite side of the second radiator form a third extension section;

[0022] The second grounding pattern includes a grounding area, the grounding area is located at an edge of the second grounding pattern, the grounding area corresponds to the third feeding terminal, and an edge of the grounding area forms a portion of the second coupling gap.

[0023] Furthermore, the antenna assembly further comprises a first transmission line, a second transmission line and a third transmission line, wherein the first transmission line, the second transmission line and the third transmission line each comprise an inner conductor and an outer conductor, wherein the inner conductor of the third transmission line is fixedly connected to the third feeding terminal and the outer conductor is connected to the grounding area;

[0024] The inner conductors of the first transmission line and the second transmission line are fixedly connected to the first feeding end and the second feeding end respectively, and the outer conductors of the first transmission line and the second transmission line are fixedly connected to the grounding branch.

[0025] Further, the third radiator includes a first conductive branch node, and the first conductive branch node includes a first middle segment and two first bending segments;

[0026] The fourth radiator includes a second conductive branch node, and the second conductive branch node includes a second middle segment and two second bending segments;

[0027] The two first bending sections are connected to the two ends of the first middle section, the two second bending sections are connected to the two ends of the second middle section, and the two first bending sections and the two second bending sections are all bent toward the common grounding portion.

[0028] Furthermore, the first conductive branch node further includes a first connecting segment, and the second conductive branch node further includes a second connecting segment;

[0029] The extension direction of the first connecting section and the second connecting section is consistent with the extension direction of the first extending section. The first connecting section is located between the two first bending sections, and the second connecting section is located between the two second bending sections. One end of the first connecting section is connected to the first middle section, and the other end is connected to the first feeding branch node. One end of the second connecting section is connected to the second middle section, and the other end is connected to the second feeding branch node.

[0030] Further, the third radiator includes a first conductive sheet and a second conductive sheet, the first conductive sheet and the second conductive sheet are located on both sides of the first connecting section and connected to an end of the first connecting section close to the first feeding branch, the first conductive sheet and the first middle section and the opposite side of the first connecting section form a third coupling gap, and the second conductive sheet and the first middle section and the opposite side of the first connecting section form a fourth coupling gap;

[0031] The fourth radiator includes a third conductive plate and a fourth conductive plate, which are located on both sides of the second connecting segment and connected to an end of the second connecting segment close to the second feeding branch. The third conductive plate and the opposite sides of the second middle segment and the second connecting segment form a fifth coupling gap, and the fourth conductive plate and the opposite sides of the second middle segment and the second connecting segment form a sixth coupling gap.

[0032] Further, the first conductive sheet, the third conductive sheet and the fourth conductive sheet are all rectangular;

[0033] The first conductive sheet and the opposite side of the second radiator form a seventh coupling gap, the third conductive sheet and the opposite side of the second radiator form an eighth coupling gap, and the fourth conductive sheet and the opposite side of the first ground pattern form a ninth coupling gap;

[0034] The second conductive sheet has a bevel, which is located on a side of the second conductive sheet close to the first ground pattern, and is away from one end of the first connecting section and is inclined in a direction away from the first ground pattern.

[0035] Furthermore, the antenna assembly also includes:

[0036] The dielectric block is arranged between the first radiator and the second radiator. The thickness of the dielectric block is greater than the thickness of the substrate and the dielectric constant of the dielectric block is greater than the dielectric constant of the substrate.

[0037] Furthermore, the antenna assembly also includes:

[0038] A plurality of conductive members are connected between the first radiator and the third feeding branch, between the second radiator and the second ground pattern, and between the first ground pattern and the second ground pattern.

[0039] Further, the substrate is provided with a plurality of first through holes;

[0040] The antenna assembly also includes:

[0041] A dielectric block is provided with a second through hole, the dielectric block is arranged between the first radiator and the second radiator, and the second through hole corresponds to a first through hole;

[0042] The plurality of conductive members are respectively disposed in the plurality of first through holes and the second through holes.

[0043] The antenna assembly of the embodiment of the present invention uses a common grounding portion to provide grounding for the first radiating portion and the second radiating portion, and the second radiator and the first grounding pattern are arranged on the same side of the substrate. Thus, on the one hand, the second radiator and the first grounding pattern are arranged at intervals to form a first coupling gap, and the first feed branch node and the second feed branch node are arranged in the first coupling gap. Thus, the coupling strength between the first grounding pattern and the main radiating unit, the diversity radiating unit and the second radiator is improved, and the first radiating portion and the second radiating portion are respectively sent and received for electromagnetic signals of a predetermined frequency band. At the same time, it is avoided that the main radiating unit, the diversity radiating unit and the first radiating portion are separately provided with grounding, which increases the space occupied by the antenna assembly. On the other hand, the distances between the feeding point and the first side and the second side are configured to be different, and the first side and the second side have an angle. So that the guided electromagnetic waves on the first side and the second side generate a potential difference, and at the same time, after the two are superimposed on each other, they are coupled to the second radiator to generate a circularly polarized electromagnetic signal. The communication requirements between the antenna assembly and the satellite are met, so that the first radiating portion can be used to position the antenna assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0045] Figure 1 is a schematic structural diagram of an antenna assembly according to an embodiment of the present invention;

[0046] Figure 2 is an exploded schematic diagram of one side of an antenna assembly according to an embodiment of the present invention;

[0047] Figure 3 is an exploded schematic diagram of the other side of the antenna assembly of an embodiment of the present invention;

[0048] Figure 4 is a partial cross-sectional schematic diagram of an antenna assembly according to an embodiment of the present invention;

[0049] Figure 5 is a schematic structural diagram of a first radiating portion, a second radiating portion and a common grounding portion according to an embodiment of the present invention;

[0050] Figure 6 is a schematic structural diagram of a third feeding branch and a common grounding portion in an embodiment of the present invention;

[0051] Figure 7 is a schematic diagram of the structure of a coupling gap according to an embodiment of the present invention;

[0052] Figure 8 is a schematic diagram of electromagnetic signal simulation of an antenna assembly according to an embodiment of the present invention in some implementation modes;

[0053] Fig. 9Schematic diagram of electromagnetic signal simulation of the antenna assembly of the embodiment of the present invention in other implementations

[0054] Fig.10 is a schematic diagram of electromagnetic signal simulation of the antenna assembly of the embodiment of the present invention in some other implementation modes;

[0055] Fig.11 is a simulation test diagram of the radiation efficiency and gain of the main radiation unit of an embodiment of the present invention;

[0056] Fig.12 is a simulation test diagram of the radiation efficiency and gain of the diversity radiation unit according to an embodiment of the present invention;

[0057] Fig.13 is a simulation test diagram of the radiation efficiency and gain of the first radiating portion of an embodiment of the present invention;

[0058] Fig.14 is a Smith simulation test diagram of the main radiation unit of an embodiment of the present invention;

[0059] Fig.15 is a Smith simulation test diagram of a diversity radiation unit according to an embodiment of the present invention;

[0060] Fig.16 is a Smith simulation test diagram of the first radiating portion of an embodiment of the present invention;

[0061] Fig.17 This is a simulation diagram of the efficiency of the first radiating portion at 1.575 GHz according to an embodiment of the present invention.

[0062] Description of reference numerals:

[0063] 1- first radiation part;

[0064] 11-first radiator; 111-first side; 112-second side; 113-feeding point;

[0065] 12- second radiator;

[0066] 13-third feeding branch; 131-third feeding terminal; 132-third connecting terminal;

[0067] 2- second radiation part;

[0068] 21-main radiation unit; 211-first feeding branch; 2111-first feeding end; 2112-first connecting end; 212-third radiator; 2121-first conductive branch; 2122-first middle section; 2123-first bending section; 2124-first connecting section; 2125-first conductive sheet; 2126-second conductive sheet; 2127-hypotenuse;

[0069] 22-diversity radiation unit; 221-second feeding branch; 2211-second feeding end; 2212-second connecting end; 222-fourth radiator; 2221-second conductive branch; 2222-second middle section; 2223-second bending section; 2224-second connecting section; 2225-third conductive sheet; 2226-fourth conductive sheet;

[0070] 3- Public grounding part;

[0071] 31-first ground pattern; 311-ground branch;

[0072] 32-second ground pattern; 321-ground area;

[0073] 4-Substrate;

[0074] 41-first through hole;

[0075] 51-first coupling gap; 511-first extension section; 512-second extension section; 513-third extension section; 52-second coupling gap; 53-third coupling gap; 54-fourth coupling gap; 55-fifth coupling gap; 56-sixth coupling gap; 57-seventh coupling gap; 58-eighth coupling gap; 59-ninth coupling gap;

[0076] 6- Cables;

[0077] 61-first transmission line; 62-second transmission line; 63-third transmission line;

[0078] 7- medium block;

[0079] 71- second through hole;

[0080] 8- conductive parts;

[0081] 9- Shell. DETAILED DESCRIPTION

[0082] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. It is possible for a person skilled in the art to fully understand the present invention without the description of these details. In order to avoid confusing the essence of the present invention, known methods, processes, flows, components and circuits are not described in detail.

[0083] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0084] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0085] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0086] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, an element described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0088] Figure 1 Schematic diagram of the structure of the antenna assembly of this embodiment. Figure 2 and Figure 3 : is an exploded schematic diagram of the antenna assembly of this embodiment. The antenna assembly in the figure is provided with a shell 9, a first radiating portion 1 provided on both the substrate 4 and the dielectric block 7, a second radiating portion 2 provided on the substrate 4, and a common grounding portion 3. The first radiating portion 1, the second radiating portion 2, and the common grounding portion 3 are provided in the shell 9 and connected to the cable 6.

[0089] Figure 4: is a partial cross-sectional schematic diagram of the antenna assembly of this embodiment. The figure shows the connection method of the first transmission line 61 and the second transmission line 62. The ends of the inner conductors of the first transmission line 61 and the second transmission line 62 are fixedly connected to the second radiating portion 2, and the outer conductors of the first transmission line 61 and the second transmission line 62 are fixedly connected to the grounding branch 311 at the same time. The outer conductor in this embodiment is used to achieve grounding of the common grounding portion 3.

[0090] In this embodiment, the first transmission line 61, the second transmission line 62 and the third transmission line 63 can be coaxial cables. The core of the coaxial cable is the inner conductor, the braided layer is the outer conductor, and an insulating layer is provided between the core and the braided layer to avoid short circuit between the core and the braided layer.

[0091] Figure 5 and Figure 6 It is a schematic structural diagram of the common grounding portion 3 and the first radiating portion 1 and the second radiating portion 2 of this embodiment. Figure 7 Schematic diagram of the structure of the coupling gap of this embodiment. Figure 5 and Figure 7 It is a schematic diagram of the structure of the antenna assembly at the top. Figure 6 Schematic diagram of the structure of the antenna assembly from the bottom (the substrate 4, the third radiator 212 and the fourth radiator 222 are not shown in the figure). In the figure above, the outlines of the first radiating portion 1 and the second radiating portion 2 are shown with thick solid lines, and the outline of the common ground portion 3 is shown with thin solid lines, and Figure 5 The main radiation unit 21, the diversity radiation unit 22, the first radiator 11 and the second radiator 12 and Figure 6 The third feed branch 13 in FIG. 1 is provided with a hatching line. Figure 7 The outline of the second coupling slot 52 is shown with a dashed line.

[0092] In some embodiments, Figure 1-Figure 2 As shown, the antenna assembly in this embodiment includes a first radiating portion 1 , a second radiating portion 2 , a common ground portion 3 and a substrate 4 .

[0093] Further reference Figure 3 , Figure 5 and Figure 7 As shown, the first radiating portion 1 includes a first radiator 11 and a second radiator 12 arranged opposite to each other. The first radiator 11 is spaced apart from the substrate 4, and the first radiator 11 is coupled to the second radiator 12. The first radiator 11 has a first side 111, a second side 112 and a feeding point 113, and the distances from the feeding point 113 to the first side 111 and the second side 112 are set differently ( Figure 7The distance L1 is greater than the distance L2), and the first side 111 and the second side 112 extend in different directions. That is, the distances from the feeding point 113 to the first side 111 and the second side 112 are different, and the first side 111 and the second side 112 extend in different directions.

[0094] In this embodiment, the first radiator 11 and the second radiator 12 are spaced apart from each other, so that the first radiator 11 and the second radiator 12 are coupled to each other. Thus, the electromagnetic signal on the first radiator 11 can be coupled to the second radiator 12.

[0095] Specifically, Figure 7 As shown, the first side 111 is connected to one end of the second side 112 and is perpendicular to each other. As a result, the guided electromagnetic waves fed from the feeding point 113 can be conducted along the first side 111 and the second side 112, respectively, and the distances from the feeding point 113 to the first side 111 and the second side 112 are set differently, that is, the distances are different, so that the guided electromagnetic waves conducted to the first side 111 and the second side 112 have a phase difference. For example, the distance L1 differs from the distance L2 by one quarter λ. Wherein, λ is the working wavelength of the first radiating portion 1, so that the guided electromagnetic waves on the first side 111 and the second side 112 differ by 90 degrees, thereby ensuring that the first radiating portion 1 can transmit circularly polarized electromagnetic signals.

[0096] The second radiating portion 2 in this embodiment is disposed on the substrate 4 and includes a main radiating unit 21 and a diversity radiating unit 22 opposite to each other. The main radiating unit 21 includes a first feeding branch 211 , and the diversity radiating unit 22 includes a second feeding branch 221 .

[0097] Specifically, the second radiating portion 2 in this embodiment transmits electromagnetic signals in a spatial diversity manner. Figure 5 As shown in the middle distance L3, a certain distance is maintained between the main radiation unit 21 and the diversity radiation unit 22, and the distance L3 can be 0.5 to 0.8 times the working wavelength of the second radiation unit 2. The diversity reception of the antenna enables the antenna to perform distributed transmission and centralized processing of electromagnetic signals. Among them, distributed transmission enables the receiving end to obtain multiple independent fading signals carrying the same information. Centralized processing is to combine multiple independent fading signals received to reduce the impact of fading.

[0098] The attenuation of electromagnetic signals, that is, when electromagnetic signals propagate in a transmission medium, part of the energy will be converted into heat energy or absorbed by the transmission medium, thereby causing the signal strength to continuously weaken. In this embodiment, the main radiation unit 21 and the diversity radiation unit 22 in the second radiation part 2 are used to transmit the same electromagnetic signal respectively to ensure the accuracy of the antenna assembly in sending and receiving signals.

[0099] The common grounding portion 3 in this embodiment includes a first grounding pattern 31. The first grounding pattern 31 and the second radiator 12 are arranged on the same side of the substrate 4. The first grounding pattern 31 and the second radiator 12 are arranged at intervals and a first coupling slot 51 is formed on the opposite side. At least part of the first feed branch 211 and at least part of the second feed branch 221 are arranged in the first coupling slot 51. The first feed branch 211, the second feed branch 221 and the second radiator 12 are coupled to the first grounding pattern 31 through the first coupling slot 51.

[0100] The first coupling slot 51 in this embodiment can improve the coupling strength between the first ground pattern 31 and the second radiator 12, and can also provide grounding for the main radiating unit 21 and the diversity radiating unit 22. The grounding requirements of the first radiating portion 1 and the second radiating portion 2 are met, and the working frequency band of the antenna assembly is widened.

[0101] In summary, the antenna assembly of this embodiment uses the common grounding portion 3 to provide grounding for the first radiating portion 1 and the second radiating portion 2, and the second radiator 12 and the first grounding pattern 31 are arranged on the same side of the substrate 4. Therefore, on the one hand, the second radiator 12 and the first grounding pattern 31 are arranged to form a first coupling gap 51, and the first feeding branch 211 and the second feeding branch 221 are arranged in the first coupling gap 51. Thereby, the coupling strength between the first grounding pattern 31 and the main radiating unit 21, the diversity radiating unit 22 and the second radiator 12 is improved, and the first radiating portion 1 and the second radiating portion 2 are respectively sent and received for electromagnetic signals of a predetermined frequency band. At the same time, it is avoided that the main radiating unit 21, the diversity radiating unit 22 and the first radiating portion 1 are separately provided with grounding, which increases the space occupied by the antenna assembly. On the other hand, the distances between the feeding point 113 and the first side 111 and the second side 112 are configured to be different, and the first side 111 and the second side 112 have an angle. The guided electromagnetic waves on the first side 111 and the second side 112 generate a potential difference, and after the two are superimposed on each other, they are coupled to the second radiator 12 to generate a circularly polarized electromagnetic signal. The communication requirements between the antenna assembly and the satellite are met, so that the first radiating portion 1 can be used to locate the antenna assembly.

[0102] Preferably, the working frequency band of the second radiating unit 2 in this embodiment, that is, the working frequency band of the main radiating unit 21 and the diversity radiating unit 22 can be configured to 0.82-0.96 GHz and 1.7-2.7 GHz at the same time, so that the second radiating unit 2 can transmit 2G, 3G or 4G signals. The working frequency band of the first radiating unit 1 in this embodiment is configured to 1.575 GHz or 1.176 GHz. That is, it corresponds to the L1 and L5 frequency bands of the GPS satellite. Thus, the first radiating unit 1 can be used to transmit GPS signals. As a result, the antenna assembly in this embodiment can simultaneously meet the signal transmission requirements of mobile communications and satellite communications.

[0103] Preferably, the first radiating portion 1 is configured to transmit an electromagnetic signal in the L5 frequency band, so that the operating frequency bands of the first radiating portion 1 and the second radiating portion 2 are staggered, thereby avoiding mutual interference between the first radiating portion 1 and the second radiating portion 2. In the form that the first radiating portion 1 and the second radiating portion 2 share a common grounding portion 3, the isolation between the first radiating portion 1 and the second radiating portion 2 is increased.

[0104] In some embodiments, Figure 5-Figure 6 As shown, the main radiation unit 21 further includes a third radiation body 212. The diversity radiation unit 22 further includes a fourth radiation body 222. The third radiation body 212 and the fourth radiation body 222 are located at two sides of the common ground portion 3, respectively.

[0105] One end of the first feeding branch 211 extends to the outside of the first coupling slot 51 and is connected to the third radiator 212 , and one end of the second feeding branch 221 extends to the outside of the first coupling slot 51 and is connected to the fourth radiator 222 .

[0106] In this embodiment, when the main radiation unit 21 and the diversity radiation unit 22 perform diversity reception, a certain distance (such as Figure 6 As shown in the figure, the second radiating portion 2 is arranged between the main radiating unit 21 and the diversity radiating unit 22, so that the overall structure of the antenna assembly is more compact. At the same time, the first feeding branch 211 and the second feeding branch 221 are used to couple the guided electromagnetic waves with the first ground pattern 31 before the guided electromagnetic waves are transmitted to the main radiating unit 21 and the diversity radiating unit 22, thereby widening the frequency band of the electromagnetic signal of the second radiating portion 2 and improving the overall performance of the antenna assembly.

[0107] In some embodiments, Figure 7 As shown, the first coupling slot 51 includes two first extension segments 511 and two second extension segments 512. The two second extension segments 512 are located on both sides of the first radiator 11, and the two first extension segments 511 extend from the two second extension segments 512 to the third radiator 212 and the fourth radiator 222, respectively.

[0108] The first extension section 511 and the second extension section 512 are parallel to the first side edge 111 and the second side edge 112 respectively, and the first extension section 511 and the second extension section 512 are vertically connected.

[0109] In this embodiment, the two first extension sections 511 and the two second extension sections 512 are arranged one by one, and the first extension sections 511 and the second extension sections 512 are arranged vertically and respectively extend in the same direction as the first side edge 111 and the second side edge 112. That is, the first side edge 111 and the second side edge 112 are also in a vertical state.

[0110] Therefore, the second radiator 12 in this embodiment is coupled with the first radiator 11 through the first extension section 511 and the second extension section 512. Thus, the second radiator 12 can cooperate with the first radiator 11 to transmit and receive circularly polarized electromagnetic signals.

[0111] In some embodiments, Figure 5 and Figure 7 As shown, the first radiator 11 is rectangular and has two first sides 111 and two second sides 112. The feeding point 113 is offset from the center of the first radiator 11.

[0112] The first coupling slot 51 further includes a third extension segment 513. The third extension segment 513 is connected between the two second extension segments 512 and is parallel to the first side edge 111. The first coupling slot 51 is disposed around a portion of the first radiator 11.

[0113] In this embodiment, the two second extension sections 512 are respectively disposed opposite to partial regions of the two first side edges 111. Thus, the coupling strength between the first radiator 11 and the second radiator 12 can be increased.

[0114] Figure 8 , Fig. 9 and Fig.10 They are schematic diagrams of electromagnetic signal simulation of the antenna assembly of this embodiment at 0.9 GHz, 2 GHz and 2.5 GHz respectively.

[0115] Figure 8 A specific conduction form of the guided electromagnetic wave in the first coupling slot 51 is shown in FIG. In the first coupling slot 51 (area I) near the main radiation unit 21 in the figure, the guided electromagnetic wave on it is conducted to the left in the first extension section 511 and to the upper side in the second extension section 512, so that the guided electromagnetic waves can be superimposed on each other on the second radiator 12. That is, when the working frequency band is 0.9 GHz, a clockwise circularly polarized electromagnetic signal is generated on the first coupling slot 51.

[0116] In some embodiments, Figure 5-Figure 7 As shown, the first feeding branch 211 has a first feeding end 2111 and a first connecting end 2112 . The second feeding branch 221 has a second feeding end 2211 and a second connecting end 2212 .

[0117] The first feeding end 2111 and the second feeding end 2211 are located in the third extension section 513 and are spaced apart from each other. The first connecting end 2112 and the second connecting end 2212 extend to the outside of the first extension section 511 and are connected to the third radiator 212 and the fourth radiator 222 respectively.

[0118] In this embodiment, the first feeding branch 211 and the second feeding branch 221 are utilized so that the main radiating unit 21 and the diversity radiating unit 22 are staggered with the second radiator 12. When the first radiating portion 1 sends a GPS signal in the direction of the first radiator 11, the influence of the GPS signal on the main radiating unit 21 and the diversity radiating unit 22 can be reduced, thereby improving the isolation of the antenna assembly.

[0119] In some embodiments, Figure 3 , Figure 5 and Figure 6 As shown, the common grounding portion 3 further includes a second grounding pattern 32. The second grounding pattern 32 has a second coupling slot 52 and is disposed on a side of the substrate 4 away from the first grounding pattern 31.

[0120] The first radiating portion 1 further includes a third feeding branch 13 , which is disposed on a side of the substrate 4 away from the first ground pattern 31 and located in the second coupling slot 52 . The third feeding branch 13 is coupled to the second coupling slot 52 and electrically connected to the first radiator 11 .

[0121] Specifically, in this embodiment, the second ground pattern 32 is rectangular. A second coupling slot 52 is provided at a position of the second ground pattern 32 close to the first ground pattern 31. The second coupling slot 52 is close to the edge of the second ground pattern 32 and is perpendicular to the extension direction of the third extension section 513.

[0122] In this embodiment, the third feeding branch 13 can be used to feed the guided electromagnetic wave into the first radiator 11 . Meanwhile, the cooperation between the third feeding branch 13 and the second coupling slot 52 can further broaden the working frequency band of the first radiating portion 1 and ensure the radiation efficiency of the first radiating portion 1 .

[0123] Specifically, Fig. 9 As shown, the second ground pattern 32 in this embodiment includes a first area and a second area, and the first area is arranged opposite to the second radiator 12. The second area is arranged opposite to the first ground pattern 31. As a result, the electromagnetic signal in the middle area of ​​the second radiator 12 can be coupled to the first area (area IV). The electromagnetic signal of the first ground pattern 31 can be coupled to the second area (area V). To meet the transmission requirements of electromagnetic signals.

[0124] In some embodiments, Figure 5-Figure 7 As shown, the third feeding branch 13 has a third feeding end 131 and a third connecting end 132. The third connecting end 132 is electrically connected to the first radiator 11. At least part of the third feeding end 131 corresponds to the third extension section 513 and is located between the first feeding branch 211 and the second feeding branch 221.

[0125] In this embodiment, the first feeding terminal 2111, the second feeding terminal 2211 and the third feeding terminal 131 are close to each other. When the guided electromagnetic wave is fed from the first feeding terminal 2111, the second feeding terminal 2211 and the third feeding terminal 131, the potential of the same area of ​​the antenna component can be kept consistent, so that in the conduction direction of the guided electromagnetic wave, the potential difference of each area of ​​the first feeding branch 211, the second feeding branch 221 and the third feeding branch 13 relative to the second ground pattern 32 remains relatively consistent.

[0126] In some embodiments, Figure 5-Figure 7 As shown, the first feeding branch 211 has a first feeding end 2111. The second feeding branch 221 has a second feeding end 2211. The first feeding end 2111 and the second feeding end 2211 are disposed on the third extension section 513, and are located on both sides of the third feeding end 131 and close to the third feeding end 131.

[0127] The first ground pattern 31 includes a ground branch 311 , and the ground branch 311 and the side opposite to the second radiator 12 form a third extension section 513 .

[0128] The second ground pattern 32 includes a ground region 321 . The ground region 321 is located at an edge of the second ground pattern 32 . The ground region 321 corresponds to the third feeding terminal 131 . The edge of the ground region 321 forms a portion of the second coupling gap 52 .

[0129] In this embodiment, the grounding region 321 and the grounding branch 311 are arranged adjacent to the first feeding terminal 2111, the second feeding terminal 2211 and the third feeding terminal 131. When the guided electromagnetic wave is transmitted along the first feeding branch 211, the second feeding branch 221 and the third feeding branch 131, the potential difference of the guided electromagnetic wave relative to the common ground portion 3 can be kept consistent as much as possible. Thus, the radiation performance of the antenna assembly is met.

[0130] In some embodiments, further reference is made to Figure 3 and Figure 4 As shown, the antenna assembly also includes a first transmission line 61, a second transmission line 62 and a third transmission line 63. The first transmission line 61, the second transmission line 62 and the third transmission line 63 each include an inner conductor and an outer conductor. The inner conductor of the third transmission line 63 is fixedly connected to the third feeding terminal 131 and the outer conductor is connected to the grounding area 321.

[0131] The inner conductor of the first transmission line 61 and the inner conductor of the second transmission line 62 are fixedly connected to the first feeding terminal 2111 and the second feeding terminal 2211 respectively, and the outer conductor of the first transmission line 61 and the outer conductor of the second transmission line 62 are fixedly connected to the ground branch 311 .

[0132] The arrangement positions of the grounding branch 311 and the grounding area 321 in this embodiment can simplify the connection mode of the cable 6 with the first radiating portion 1, the second radiating portion 2 and the common grounding portion 3. The cable 6 includes a first transmission line 61, a second transmission line 62 and a third transmission line 63. On the other hand, the first transmission line 61, the second transmission line 62 and the third transmission line 63 have the same potential on the common grounding portion 3, so that the common grounding portion 3 can provide grounding for the first radiating portion 1 and the second radiating portion 2 at the same time.

[0133] Specifically, the antenna assembly includes a shell 9. The shell 9 includes an upper shell and a lower shell. The upper shell is buckled with the lower shell to accommodate the antenna body. The antenna body includes a first radiating portion 1, a second radiating portion 2, a common ground portion 3, a substrate 4 and a dielectric block 7. One end of the cable 6 is connected to the antenna body, and the other end extends to the outside of the shell 9 through the wire hole on the shell 9, and is connected to the vehicle-mounted system through a FAKRA connector. This embodiment greatly simplifies the connection method between the cable 6 and the antenna body, and reduces the difficulty of installing the antenna assembly.

[0134] In some embodiments, Figure 5 As shown, the third radiator 212 includes a first conductive branch 2121 . The first conductive branch 2121 includes a first middle segment 2122 and two first bending segments 2123 .

[0135] In contrast, the fourth radiator 222 includes a second conductive branch 2221 . The second conductive branch 2221 includes a second middle segment 2222 and two second bent segments 2223 .

[0136] The two first bending sections 2123 are connected to two ends of the first middle section 2122 , and the two second bending sections 2223 are connected to two ends of the second middle section 2222 . Both the two first bending sections 2123 and the two second bending sections 2223 are bent toward the common ground portion 3 .

[0137] In this embodiment, the first conductive branch 2121 and the second conductive branch 2221 are arranged substantially symmetrically with respect to the first radiating portion 1, so that the second radiating portion 2 can transmit electromagnetic signals in a spatial diversity manner, so that the attenuation of the antenna components transmitted and received by the main radiating unit 21 and the diversity radiating unit 22 has a certain difference, thereby ensuring the signal transmission and reception performance of the second radiating portion 2.

[0138] In some embodiments, Figure 5 As shown, the first conductive branch 2121 further includes a first connecting segment 2124 . The second conductive branch 2221 further includes a second connecting segment 2224 .

[0139] Meanwhile, the extension direction of the first connecting section 2124 and the second connecting section 2224 is consistent with the extension direction of the first extending section 511. The first connecting section 2124 is located between the two first bending sections 2123, and the second connecting section 2224 is located between the two second bending sections 2223, and one end of the first connecting section 2124 is connected to the first middle section 2122, and the other end is connected to the first feeding branch 211. One end of the second connecting section 2224 is connected to the second middle section 2222, and the other end is connected to the second feeding branch 221.

[0140] Specifically, the first connecting segment 2124 is consistent with the extension direction of the first feeding branch node 211 located in the first extension segment 511, and the second connecting segment 2224 is consistent with the extension direction of the second feeding branch node 221 located in the first extension segment 511, so that the electromagnetic signal is transmitted to the first conductive branch node 2121 and the second conductive branch node 2221 respectively through the first connecting segment 2124 and the second connecting segment 2224.

[0141] Further, refer to Figure 7 As shown, the third radiator 212 includes a first conductive plate 2125 and a second conductive plate 2126. The first conductive plate 2125 and the second conductive plate 2126 are located on both sides of the first connecting section 2124 and connected to an end of the first connecting section 2124 close to the first feeding branch 211. The first conductive plate 2125 and the opposite sides of the first middle section 2122 and the first connecting section 2124 form a third coupling gap 53. The second conductive plate 2126 and the opposite sides of the first middle section 2122 and the first connecting section 2124 form a fourth coupling gap 54.

[0142] The fourth radiator 222 includes a third conductive plate 2225 and a fourth conductive plate 2226, which are located on both sides of the second connecting section 2224 and connected to an end of the second connecting section 2224 close to the second feeding branch 221. The third conductive plate 2225 forms a fifth coupling gap 55 with the second middle section 2222 and the second connecting section 2224 on the opposite side. The fourth conductive plate 2226 forms a sixth coupling gap 56 with the second middle section 2222 and the second connecting section 2224 on the opposite side.

[0143] The third radiator 212 and the fourth radiator 222 in this embodiment can be equivalent to the first slot antenna and the second slot antenna, respectively. The first slot antenna has a first radiation slot and a second radiation slot, that is, a third coupling slot 53 and a fourth coupling slot 54. The second slot antenna has a third radiation slot and a fourth radiation slot, that is, a fifth coupling slot 55 and a sixth coupling slot 56.

[0144] Figure 8 and Fig.102 respectively show the conduction forms of the electromagnetic waves guided by the second radiating portion 2 in the 0.9 GHz and 2.5 GHz frequency bands.

[0145] Figure 8 When the second radiation part 2 is at 0.9 GHz, the guided electromagnetic wave has a relatively high electromagnetic intensity in both the third coupling slot 53 and the fourth coupling slot 54 on the main radiation unit 21 (region II).

[0146] Fig.10 When the second radiation part 2 is at 2.5 GHz, the guided electromagnetic wave has a higher electromagnetic intensity (region III) in the third coupling slot 53 on the main radiation unit 21. That is, the third coupling slot 53, the fourth coupling slot 54, the fifth coupling slot 55 and the sixth coupling slot 56 can play different roles in different frequency bands of mobile communication.

[0147] In some embodiments, refer to Figure 7 As shown, the first conductive sheet 2125 , the third conductive sheet 2225 , and the fourth conductive sheet 2226 are all rectangular.

[0148] The first conductive plate 2125 and the second radiator 12 form a seventh coupling slot 57 on the opposite side thereof. The third conductive plate 2225 and the second radiator 12 form an eighth coupling slot 58 on the opposite side thereof. The fourth conductive plate 2226 and the first ground pattern 31 form a ninth coupling slot 59 on the opposite side thereof.

[0149] The second conductive sheet 2126 has a bevel 2127. The bevel 2127 is located on a side of the second conductive sheet 2126 close to the first ground pattern 31. The bevel 2127 is away from one end of the first connecting section 2124 and is inclined in a direction away from the first ground pattern 31.

[0150] Specifically, the second radiator 12 and the first ground pattern 31 are directly connected to the second ground pattern 32 through the conductive member 8. As a result, the first conductive sheet 2125, the third conductive sheet 2225 and the fourth conductive sheet 2226 are coupled to the common ground portion 3 through the seventh coupling slot 57, the eighth coupling slot 58 and the ninth coupling slot 59, respectively. Further, the two sides of the first conductive sheet 2125, the third conductive sheet 2225 and the fourth conductive sheet 2226 have a large potential difference, thereby improving the radiation intensity of the main radiation unit 21 and the diversity radiation unit 22. On the other hand, the hypotenuse 2127 of the second conductive sheet 2126 forms a cut angle, which reduces the coupling performance between the second conductive sheet 2126 and the first ground pattern 31, so that part of the guided electromagnetic wave of the main radiation unit 21 is coupled to the first ground pattern 31 through the end of the first bending section 2123. Thus, the conduction distance of the guided electromagnetic wave on the first conductive branch 2121 is increased. Especially when the frequency is high, the main radiation unit 21 radiates electromagnetic signals only through the third coupling slot 53 .

[0151] In some embodiments, Figure 2-Figure 3 As shown, the antenna assembly further includes a dielectric block 7. The dielectric block 7 is disposed between the first radiator 11 and the second radiator 12, and the thickness of the dielectric block 7 is greater than the thickness of the substrate 4 and the dielectric constant of the dielectric block 7 is greater than the dielectric constant of the substrate 4.

[0152] The material of the substrate 4 in this embodiment includes epoxy resin. In contrast, the material of the dielectric block 7 is ceramic.

[0153] In this embodiment, the dielectric block 7 is disposed between the first radiator 11 and the second radiator 12, thereby increasing the dielectric constant therebetween, improving the impedance matching characteristics of the first radiating portion 1, and at the same time, making the distance between the first radiator 11 and the second radiator 12 smaller, thereby reducing the overall thickness of the antenna assembly.

[0154] Specifically, the material of the substrate 4 can be RF4, and its dielectric constant is 4.2-4.7. The dielectric constant of the dielectric block 7 can be configured to be 10-35. Those skilled in the art can select it according to the operating frequency of the antenna assembly. The material of the dielectric block 7 includes but is not limited to components such as aluminum oxide, titanium dioxide, glass powder, and adhesive.

[0155] This embodiment uses materials with different dielectric constants to change the coupling performance between the first radiator 11 and the second radiator 12. Especially when the operating frequency of the first radiating portion 1 is low, the coupling performance between the first radiator 11 and the second radiator 12 can be improved and the impedance of the first radiating portion 1 can be adjusted.

[0156] In some embodiments, Figure 3-Figure 4As shown, the antenna assembly further includes a plurality of conductive members 8. The plurality of conductive members 8 are connected between the first radiator 11 and the third feeding branch 13, between the second radiator 12 and the second ground pattern 32, and between the first ground pattern 31 and the second ground pattern 32.

[0157] In this embodiment, the second radiator 12 is directly connected to the first ground pattern 31 through the conductive member 8, and the first ground pattern 31 is directly connected to the second ground pattern 32 through the conductive member 8. Thus, the operating frequency of the first radiating portion 1 is increased, so that the low-frequency signal in the first radiating portion 1 that does not meet the requirements is fed into the common ground portion 3.

[0158] In some embodiments, Figure 3-Figure 4 As shown, the substrate 4 is provided with a plurality of first through holes 41. The antenna assembly further includes a dielectric block 7. The dielectric block 7 is provided with a second through hole 71. When the dielectric block 7 is disposed between the first radiator 11 and the second radiator 12, the second through hole 71 is disposed corresponding to one of the first through holes 41. The plurality of conductive members 8 are respectively disposed in the plurality of first through holes 41 and the second through holes 71.

[0159] Preferably, the conductive member 8 is directly formed on the inner wall of the plurality of first through holes 41 staggered from the second through hole 71 of the substrate 4 by a laser direct forming process, and the second radiator 12, the first ground pattern 31, the main radiation unit 21 and the diversity radiation unit 22 are directly formed on one side of the substrate 4. The second ground pattern 32 and the third feeding branch 13 are directly formed on the other side of the substrate 4. Thus, the manufacturing process of the substrate 4 is simplified.

[0160] The conductive member 8 disposed in both the first through hole 41 and the second through hole 71 is a connecting screw. The connecting screw is made of metal, and a thread is disposed in the first through hole 41 corresponding to the second through hole 71. Thus, the connecting screw is used to fix the dielectric block 7 and the substrate 4 together, and the head of the connecting screw is connected to the first radiator 11, and the tail of the connecting screw is connected to the third connecting end 132. Thus, the electrical connection between the first radiator 11 and the third feeding branch 13 is realized at the same time.

[0161] Fig.11 It is a simulation test diagram of the radiation efficiency and gain of the main radiation unit 21 of this embodiment. Fig.12 It is a simulation test diagram of the radiation efficiency and gain of the diversity radiation unit 22 in this embodiment. Fig.13 It is a simulation test diagram of the radiation efficiency and gain of the first radiating portion 1 of this embodiment.

[0162] As can be seen from the figure, the radiation efficiency of the main radiation unit 21 is basically between -2.5dB and -3.5dB in the two frequency bands of 0.82-0.96GHz and 1.7-2.7GHz, and the gain is basically between 1 and 2.5dBi. The radiation efficiency of the diversity radiation unit 22 is basically between -1dB and -3.5dB in the two frequency bands of 0.82-0.96GHz and 1.7-2.7GHz, and the gain is basically between 1 and 2.5dBi. Therefore, the second radiation unit 2 has good radiation performance.

[0163] At the same time, the first radiating unit 1 has a gain between 18.25 and 23.87 dBi in the 1.55-1.6 GHz frequency band, so that the first radiating unit 1 can better meet the radiation performance of the GPS signal in the L1 frequency band.

[0164] Fig.14 It is a Smith simulation test diagram of the main radiation unit 21 of this embodiment. Fig.15 This is a Smith simulation test diagram of the diversity radiation unit 22 of this embodiment. In the figure, the 0.9 GHz point and the 1.70 GHz point are both concentrated in the center of the Smith chart. The 2.5 GHz point and the 2.69 GHz point are relatively close to the center of the Smith chart. It can be seen that the second radiation part 2 has a good impedance matching design.

[0165] Fig.16 This is a Smith simulation test diagram of the first radiating portion 1 of this embodiment. In the diagram, the points at 1.575 GHz are concentrated at the center of the Smith chart, and it can be seen that the first radiating portion 1 has a good impedance matching design.

[0166] Fig.17 1 is an efficiency simulation diagram of the first radiating portion 1 of the embodiment of the present invention at 1.575 GHz. As can be seen from the figure, the first radiating portion 1 is a directional antenna, which has less distortion in the pitch plane (vertical plane). Therefore, the antenna assembly of this embodiment can meet the performance requirements of the antenna assembly for receiving and transmitting electromagnetic signals in the direction in which the first radiator 11 is set.

[0167] In an optional implementation, the above antenna assembly is arranged in a vehicle system to improve the communication capability of the vehicle system.

[0168] In another optional implementation, the above vehicle system is installed in a vehicle to meet the vehicle network requirements of the vehicle, which includes functions such as vehicle positioning, navigation, voice calls or vehicle remote control.

[0169] In summary, the vehicle system and vehicle of this embodiment use the common grounding portion 3 of the antenna assembly to provide grounding for the first radiating portion 1 and the second radiating portion 2, and the second radiator 12 and the first grounding pattern 31 are arranged on the same side of the substrate 4. Therefore, on the one hand, the second radiator 12 and the first grounding pattern 31 are arranged to form a first coupling gap 51, and the first feeding branch 211 and the second feeding branch 221 are arranged in the first coupling gap 51. Thereby, the coupling strength between the first grounding pattern 31 and the main radiating unit 21, the diversity radiating unit 22 and the second radiator 12 is improved, and the first radiating portion 1 and the second radiating portion 2 are respectively sent and received for electromagnetic signals of a predetermined frequency band. At the same time, it is avoided that the main radiating unit 21, the diversity radiating unit 22 and the first radiating portion 1 are separately provided with grounding, which increases the space occupied by the antenna assembly. On the other hand, the distances between the feeding point 113 and the first side 111 and the second side 112 are configured to be different, and the first side 111 and the second side 112 have an angle. The guided electromagnetic waves on the first side 111 and the second side 112 generate a potential difference, and after the two are superimposed on each other, they are coupled to the second radiator 12 to generate a circularly polarized electromagnetic signal. The communication requirements between the antenna assembly and the satellite are met, so that the first radiating portion 1 can be used to locate the antenna assembly.

[0170] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An antenna assembly, characterized in that: The antenna assembly comprises: base(4); A first radiating portion (1), comprising a first radiator (11) and a second radiator (12) arranged opposite to each other, the first radiator (11) being spaced apart from the substrate (4) and coupled to the second radiator (12), the first radiator (11) having a first side edge (111), a second side edge (112) and a feeding point (113), the distances from the feeding point (113) to the first side edge (111) and the second side edge (112) being arranged at different distances, and the first side edge (111) and the second side edge (112) extending in different directions; a second radiating portion (2), arranged on the substrate (4) and comprising a main radiating unit (21) and a diversity radiating unit (22) opposite to each other, the main radiating unit (21) comprising a first feeding branch node (211), and the diversity radiating unit (22) comprising a second feeding branch node (221); and A common grounding portion (3), comprising a first grounding pattern (31), wherein the first grounding pattern (31) and the second radiator (12) are arranged on the same side of the substrate (4), the first grounding pattern (31) and the second radiator (12) are arranged at intervals and a first coupling slot (51) is formed on the opposite sides, at least part of the first feeding branch node (211) and at least part of the second feeding branch node (221) are arranged in the first coupling slot (51), wherein the first feeding branch node (211), the second feeding branch node (221) and the second radiator (12) are coupled to the first grounding pattern (31) via the first coupling slot (51); The main radiating unit (21) further comprises a third radiator (212), and the diversity radiating unit (22) further comprises a fourth radiator (222), wherein the third radiator (212) and the fourth radiator (222) are respectively located on two sides of the common grounding portion (3); One end of the first feeding branch (211) extends to the outside of the first coupling slot (51) and is connected to the third radiator (212), and one end of the second feeding branch (221) extends to the outside of the first coupling slot (51) and is connected to the fourth radiator (222).

2. The antenna assembly according to claim 1, characterized in that: The first coupling slot (51) comprises two first extension sections (511) and two second extension sections (512), the two second extension sections (512) are located on both sides of the first radiator (11), and the two first extension sections (511) extend from the two second extension sections (512) to the third radiator (212) and the fourth radiator (222), respectively; The first extension section (511) and the second extension section (512) are respectively parallel to the first side edge (111) and the second side edge (112), and the first extension section (511) and the second extension section (512) are vertically connected.

3. The antenna assembly according to claim 2, characterized in that: The first radiator (11) is rectangular and has two first side edges (111) and two second side edges (112); the feeding point (113) is offset from the center of the first radiator (11); The first coupling slot (51) further comprises a third extension segment (513), wherein the third extension segment (513) is connected between two of the second extension segments (512) and is parallel to the first side edge (111), and the first coupling slot (51) is arranged around a portion of the first radiator (11).

4. The antenna assembly according to claim 3, characterized in that: The first feeding branch (211) has a first feeding end (2111) and a first connecting end (2112), and the second feeding branch (221) has a second feeding end (2211) and a second connecting end (2212); The first feeding end (2111) and the second feeding end (2211) are located in the third extension section (513) and are arranged at intervals, and the first connecting end (2112) and the second connecting end (2212) extend to the outside of the first extension section (511) and are respectively connected to the third radiator (212) and the fourth radiator (222).

5. The antenna assembly according to claim 3, characterized in that: The common grounding portion (3) further comprises a second grounding pattern (32), wherein the second grounding pattern (32) has a second coupling gap (52) and is arranged on a side of the substrate (4) away from the first grounding pattern (31); The first radiating portion (1) further comprises a third feeding branch (13), the third feeding branch (13) being arranged on a side of the substrate (4) away from the first ground pattern (31) and being located within the second coupling slot (52), the third feeding branch (13) being coupled to the second coupling slot (52) and being electrically connected to the first radiator (11).

6. The antenna assembly according to claim 5, characterized in that: The third feeding branch (13) has a third feeding end (131) and a third connecting end (132), the third connecting end (132) being electrically connected to the first radiator (11), and at least a portion of the third feeding end (131) corresponding to the third extension section (513) and located between the first feeding branch (211) and the second feeding branch (221).

7. The antenna assembly according to claim 6, characterized in that: The first feeding branch (211) has a first feeding end (2111), the second feeding branch (221) has a second feeding end (2211), the first feeding end (2111) and the second feeding end (2211) are arranged on the third extension section (513), and the first feeding end (2111) and the second feeding end (2211) are located on both sides of the third feeding end (131) and close to the third feeding end (131); The first grounding pattern (31) comprises a grounding branch (311), and the grounding branch (311) and the side opposite to the second radiator (12) form the third extension section (513); The second grounding pattern (32) comprises a grounding area (321), the grounding area (321) is located at the edge of the second grounding pattern (32), the grounding area (321) corresponds to the third feeding terminal (131), and the edge of the grounding area (321) forms part of the second coupling gap (52).

8. The antenna assembly according to claim 7, characterized in that: The antenna assembly further comprises a first transmission line (61), a second transmission line (62) and a third transmission line (63), wherein the first transmission line (61), the second transmission line (62) and the third transmission line (63) all comprise an inner conductor and an outer conductor, wherein the inner conductor of the third transmission line (63) is fixedly connected to the third feeding end (131) and the outer conductor is connected to the grounding area (321); The inner conductors of the first transmission line (61) and the second transmission line (62) are fixedly connected to the first feeding end (2111) and the second feeding end (2211), respectively, and the outer conductors of the first transmission line (61) and the second transmission line (62) are fixedly connected to the grounding branch (311).

9. The antenna assembly according to claim 2, characterized in that: The third radiator (212) comprises a first conductive branch (2121), and the first conductive branch (2121) comprises a first middle section (2122) and two first bending sections (2123); The fourth radiator (222) comprises a second conductive branch (2221), and the second conductive branch (2221) comprises a second middle section (2222) and two second bending sections (2223); The two first bending sections (2123) are connected to the two ends of the first middle section (2122), the two second bending sections (2223) are connected to the two ends of the second middle section (2222), and the two first bending sections (2123) and the two second bending sections (2223) are both bent toward the common grounding portion (3).

10. The antenna assembly according to claim 9, characterized in that: The first conductive branch node (2121) further includes a first connecting segment (2124), and the second conductive branch node (2221) further includes a second connecting segment (2224); The extension direction of the first connecting section (2124) and the second connecting section (2224) is consistent with the extension direction of the first extending section (511); the first connecting section (2124) is located between the two first bending sections (2123); the second connecting section (2224) is located between the two second bending sections (2223); one end of the first connecting section (2124) is connected to the first middle section (2122), and the other end is connected to the first feeding branch node (211); one end of the second connecting section (2224) is connected to the second middle section (2222), and the other end is connected to the second feeding branch node (221).

11. The antenna assembly according to claim 10, characterized in that: The third radiator (212) comprises a first conductive plate (2125) and a second conductive plate (2126), wherein the first conductive plate (2125) and the second conductive plate (2126) are located on both sides of the first connecting section (2124) and are connected to an end of the first connecting section (2124) close to the first feeding branch (211), the first conductive plate (2125) and the first middle section (2122) and the first connecting section (2124) form a third coupling gap (53) on the opposite side thereof, and the second conductive plate (2126) and the first middle section (2122) and the first connecting section (2124) form a fourth coupling gap (54) on the opposite side thereof; The fourth radiator (222) comprises a third conductive plate (2225) and a fourth conductive plate (2226), wherein the third conductive plate (2225) and the fourth conductive plate (2226) are located on both sides of the second connecting segment (2224) and are connected to one end of the second connecting segment (2224) close to the second feeding branch (221), the third conductive plate (2225) and the second middle segment (2222) and the second connecting segment (2224) form a fifth coupling gap (55) on the opposite sides thereof, and the fourth conductive plate (2226) and the second middle segment (2222) and the second connecting segment (2224) form a sixth coupling gap (56) on the opposite sides thereof.

12. The antenna assembly according to claim 11, characterized in that: The first conductive sheet (2125), the third conductive sheet (2225) and the fourth conductive sheet (2226) are all rectangular; The first conductive sheet (2125) and the second radiator (12) form a seventh coupling slot (57) on the opposite side thereof, the third conductive sheet (2225) and the second radiator (12) form an eighth coupling slot (58) on the opposite side thereof, and the fourth conductive sheet (2226) and the first ground pattern (31) form a ninth coupling slot (59) on the opposite side thereof; The second conductive sheet (2126) has a bevel (2127), and the bevel (2127) is located on a side of the second conductive sheet (2126) close to the first ground pattern (31). The bevel (2127) is away from an end of the first connecting section (2124) and is inclined in a direction away from the first ground pattern (31).

13. The antenna assembly according to any one of claims 1 to 12, characterized in that: The antenna assembly further comprises: A dielectric block (7) is arranged between the first radiator (11) and the second radiator (12); the thickness of the dielectric block (7) is greater than the thickness of the substrate (4) and the dielectric constant of the dielectric block (7) is greater than the dielectric constant of the substrate (4).

14. The antenna assembly according to claim 7, characterized in that: The antenna assembly further comprises: A plurality of conductive members (8), wherein the plurality of conductive members (8) are connected between the first radiator (11) and the third feeding branch (13), between the second radiator (12) and the second ground pattern (32), and between the first ground pattern (31) and the second ground pattern (32).

15. The antenna assembly according to claim 14, characterized in that: The substrate (4) is provided with a plurality of first through holes (41); The antenna assembly further comprises: A dielectric block (7) provided with a second through hole (71), the dielectric block (7) being arranged between the first radiator (11) and the second radiator (12), the second through hole (71) corresponding to one of the first through holes (41); The plurality of conductive members (8) are respectively arranged in the plurality of first through holes (41) and the second through holes (71).

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