Antenna assembly and electronic equipment

Abstract

The embodiment of the invention discloses an antenna assembly and electronic equipment, a main radiation part, a parasitic radiation part and a grounding part are arranged on the same plate surface of a substrate together, and meanwhile, the main radiation part is arranged between the grounding part and the parasitic radiation part at intervals. Therefore, the first branch knot and the third branch knot extend in parallel, and the open circuit end of the first branch knot is obliquely arranged in the direction away from the parasitic radiation part, so that the coupling strength between the main radiation part and the grounding part can be increased. The coupling effect of the grounding part and the main radiation part can be adjusted by changing the length of the third branch knot.

Description

[0001] This application is a divisional application of the Chinese patent application with the application date of September 25, 2023, application number "202311244626.2", and name "Antenna Assembly and Electronic Device" Technical Field

[0002] The present invention relates to the field of communication technology, and in particular to an antenna component and an electronic device. Background Art

[0003] With the increasing popularity of communication technology, the performance requirements for antennas in communication equipment are becoming higher and higher. At the same time, the number of antennas in communication equipment has increased, which means that the antenna layout and performance parameters need to be considered when designing the antenna. In addition, the shielding cover in electronic equipment will also affect the layout of the antenna. How to improve the performance of the antenna and facilitate the layout of the antenna in electronic equipment has become a problem that needs to be solved. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides an antenna assembly and an electronic device, in which a main radiating portion is coupled together with a parasitic radiating portion and a grounding portion, so as to utilize the parasitic radiating portion and the grounding portion to broaden the operating frequency band of the antenna assembly and increase radiation efficiency.

[0005] According to a first aspect of an embodiment of the present invention, an antenna assembly is provided, the antenna assembly comprising:

[0006] substrate; and

[0007] The antenna unit is arranged on one side of the substrate and includes a main radiating portion, a grounding portion and a parasitic radiating portion, wherein the main radiating portion includes a middle pattern, a first branch and a feeding point arranged on the middle pattern, and the grounding portion includes a grounding point;

[0008] The grounding part, the main radiating part and the parasitic radiating part are arranged in sequence and separated by gaps, and the main radiating part is coupled with the grounding part and the parasitic radiating part;

[0009] In the arrangement direction of the ground portion, the main radiation portion and the parasitic radiation portion, the projections of the intermediate pattern, the parasitic radiation portion and the ground portion at least partially overlap, and the projection of the first branch node, the ground portion at least partially overlaps and is staggered with the parasitic radiation portion.

[0010] Further, one end of the first branch is connected to the middle pattern;

[0011] The grounding portion includes a second branch and a third branch, the second branch corresponds to the middle pattern, the third branch and the first branch are located on the same side of the antenna unit, one end of the third branch is connected to the end of the second branch, and the other end extends parallel to the end of the first branch away from the middle pattern.

[0012] Further, the middle pattern includes a first sheet-like pattern, one end of which is connected to the end of the first branch, and the other end of which extends parallel to an end of the second branch away from the third branch.

[0013] Further, the first sheet pattern is a rectangular sheet with adjacent sides of unequal lengths, the length of the first sheet pattern is consistent with the length of the second branch, and the open end of the first sheet pattern is aligned with the open end of the second branch;

[0014] The length of the third branch is shorter than the length of the first branch.

[0015] Further, the first branch node has a first transverse edge, and the third branch node has a second transverse edge;

[0016] The first transverse edge is located at the open end of the first branch, the second transverse edge is located at the open end of the third branch, and the first transverse edge and the second transverse edge are parallel to the short side of the first sheet pattern.

[0017] Furthermore, the width of the first sheet pattern is consistent with the width of the second branch.

[0018] The width of the third branch is the same as that of the first branch.

[0019] Further, the intermediate pattern includes:

[0020] a first sheet pattern, wherein the first sheet pattern is a rectangular sheet with adjacent sides of unequal lengths, one end of the first branch is connected to a short side of the first sheet pattern, and the other end extends in a direction away from the parasitic radiation portion; and

[0021] The second sheet pattern has one end connected to the long side of the first sheet pattern and the other end extending toward the parasitic radiation portion.

[0022] Furthermore, the second sheet pattern includes a first longitudinal edge and a second longitudinal edge in the extension direction, the short side of the first sheet pattern connected to the first branch is aligned with the first longitudinal edge, and the other short side is farther away from the first branch than the second longitudinal edge.

[0023] Furthermore, the first branch is disposed at an oblique angle relative to the long side of the first sheet-shaped pattern and the long side of the second sheet-shaped pattern.

[0024] Further, the extension direction of the parasitic radiation portion is consistent with the extension direction of the second sheet pattern;

[0025] The parasitic radiation portion includes a third longitudinal edge and a fourth longitudinal edge in an extending direction. The third longitudinal edge is aligned with the first longitudinal edge, and the fourth longitudinal edge is aligned with the second longitudinal edge.

[0026] Further, the second sheet pattern includes a first rectangular pattern and a second rectangular pattern, the first rectangular pattern and the second rectangular pattern extend parallel to the parasitic radiation portion from the long side of the first sheet pattern, and the length of the first rectangular pattern is less than the length of the second rectangular pattern;

[0027] The parasitic radiation portion includes a third rectangular pattern and a fourth rectangular pattern with adjacent sides of unequal lengths. The third rectangular pattern and the fourth rectangular pattern extend in parallel, and the third rectangular pattern and the fourth rectangular pattern are electrically connected at ends away from the main radiation portion. The third rectangular pattern corresponds to the first rectangular pattern, and the fourth rectangular pattern corresponds to the second rectangular pattern.

[0028] Furthermore, the length of the third rectangular pattern is greater than that of the fourth rectangular pattern, and the distance between the opposite side edges of the third rectangular pattern and the first rectangular pattern is less than the distance between the opposite side edges of the fourth rectangular pattern and the second rectangular pattern.

[0029] Further, the parasitic radiation portion further includes a fifth rectangular pattern, the fifth rectangular pattern is connected between the third rectangular pattern and the fourth rectangular pattern, and the fifth rectangular pattern, the fourth rectangular pattern and the third rectangular pattern are aligned away from the side of the main radiation portion;

[0030] In the length direction of the third rectangular pattern, the third rectangular pattern and the fifth rectangular pattern correspond to the first rectangular pattern, and in the width direction of the third rectangular pattern, an open end of the third rectangular pattern at least partially corresponds to an open end of the second rectangular pattern.

[0031] Further, the distances from the third rectangular pattern to the fourth rectangular pattern, the distances from the second rectangular pattern to the opposite side edges of the first rectangular pattern are the same.

[0032] In a second aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0033] a circuit board including a first contact and a second contact; and

[0034] An antenna assembly, comprising a first electrical connector, a second electrical connector, a substrate, and an antenna unit arranged on one side of the substrate, the antenna unit comprising a main radiating portion, a grounding portion, and a parasitic radiating portion, the main radiating portion comprising an intermediate pattern, a first branch, and a feeding point arranged on the intermediate pattern, the grounding portion comprising a grounding point, the feeding point being electrically connected to the first contact through the first electrical connector, and the grounding point being electrically connected to the second contact through the second electrical connector;

[0035] The grounding part, the main radiating part and the parasitic radiating part are arranged in sequence and spaced apart from each other, and the main radiating part is coupled with the grounding part and the parasitic radiating part;

[0036] In the arrangement direction of the ground portion, the main radiation portion and the parasitic radiation portion, the parasitic radiation portion overlaps with a projection of at least a portion of the middle pattern, and the ground portion overlaps with a projection of at least a portion of the middle pattern and at least a portion of the first branch.

[0037] Further, the electronic device further comprises a first shielding plate and a second shielding plate;

[0038] The circuit board is arranged between the first shielding plate and the second shielding plate, the substrate is arranged on a side of the first shielding plate away from the second shielding plate, and the antenna unit is located on a side of the substrate away from the first shielding plate;

[0039] The grounding portion includes a second branch and a third branch, the second branch corresponds to the middle pattern, the third branch and the first branch are located on the same side of the antenna unit, one end of the third branch is connected to the end of the second branch, and the other end extends parallel to the end of the first branch away from the middle pattern;

[0040] The parasitic radiation portion includes a third rectangular pattern and a fourth rectangular pattern with adjacent sides of unequal lengths, the third rectangular pattern and the fourth rectangular pattern extend in parallel, and ends of the third rectangular pattern and the fourth rectangular pattern away from the main radiation portion are electrically connected and correspond to the middle pattern;

[0041] In the thickness direction of the first shielding plate, the second branch, the third branch, part of the first branch, part of the third rectangular pattern and part of the middle pattern are staggered with the first shielding plate, and the parasitic radiation part, the third branch and the first branch correspond to the second shielding plate.

[0042] The antenna assembly and electronic device of the embodiment of the present invention arrange the main radiating part, the parasitic radiating part and the grounding part together on the same board surface of the substrate, and at the same time, the main radiating part is arranged between the grounding part and the parasitic radiating part. Thus, the parasitic radiating part is configured to correspond to the middle pattern, and the grounding part is configured to correspond to the first branch and the middle pattern at the same time, so that the parasitic radiating part cooperates with the grounding part to broaden the working frequency band of the antenna assembly. On the other hand, the parasitic radiating part is subjected to the electromagnetic induction effect of the main radiating part, thereby generating an induced current. The induced current enables the electromagnetic signal radiated by the parasitic radiating part to be superimposed on the electromagnetic signal radiated by the main radiating part, thereby greatly increasing the radiation efficiency of the antenna assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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:

[0044] Figure 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;

[0045] Figure 2 is an exploded schematic diagram of an electronic device according to an embodiment of the present invention;

[0046] Figure 3 is a schematic structural diagram of an antenna assembly, a first shielding plate, and a circuit board according to an embodiment of the present invention;

[0047] Figure 4 is a schematic structural diagram of an antenna assembly and a circuit board according to an embodiment of the present invention;

[0048] Figure 5 is a schematic structural diagram of a parasitic radiation unit according to an embodiment of the present invention;

[0049] Figure 6 is a schematic structural diagram of a main radiation unit according to an embodiment of the present invention;

[0050] Figure 7 is a schematic structural diagram of a grounding portion according to an embodiment of the present invention;

[0051] Figure 8 is a schematic structural diagram of an antenna unit according to an embodiment of the present invention;

[0052] Fig. 9 is a schematic diagram of simulation of guided electromagnetic waves in an antenna unit according to an embodiment of the present invention;

[0053] Fig.10 is a schematic structural diagram of an antenna unit and a first shielding plate and a second shielding plate according to an embodiment of the present invention;

[0054] Fig.11 is a schematic diagram of return loss simulation of an antenna unit according to an embodiment of the present invention;

[0055] Fig.12 is a schematic diagram of total efficiency simulation of an antenna unit according to an embodiment of the present invention;

[0056] Fig.13 Schematic diagram of Smith simulation of the antenna unit according to the embodiment of the present invention.

[0057] Description of reference numerals:

[0058] 1- Main radiation part;

[0059] 11- first branch; 111- first horizontal edge;

[0060] 12-middle pattern; 121-first sheet pattern; 122-second sheet pattern; 1221-first longitudinal edge; 1222-second longitudinal edge; 123-first rectangular pattern; 124-second rectangular pattern;

[0061] 13-feeding point;

[0062] 2- Parasitic radiation unit;

[0063] 21- third rectangular pattern; 22- fourth rectangular pattern; 23- third longitudinal edge; 24- fourth longitudinal edge; 25- fifth rectangular pattern;

[0064] 3- grounding part;

[0065] 31- grounding point;

[0066] 32-Second branch;

[0067] 33-third branch; 331-second horizontal edge;

[0068] 4- Antenna unit;

[0069] 5-Substrate;

[0070] 61-first shielding plate; 62-second shielding plate;

[0071] 7- Circuit board;

[0072] 81-first electrical connection member; 82-second electrical connection member;

[0073] 91 - back panel; 92 - storage frame; 921 - load-bearing plate; 922 - baffle; 93 - display screen. DETAILED DESCRIPTION

[0074] 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.

[0075] 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.

[0076] Unless the context clearly requires otherwise, the words "include", "including" 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".

[0077] 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.

[0078] 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.

[0079] 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.

[0080] Figure 1 Schematic diagram of the structure of the electronic device of this embodiment. Figure 2 : is an exploded schematic diagram of the electronic device of this embodiment. The electronic device in the figure includes a housing frame 92 and an antenna unit 4, a substrate 5, a circuit board 7, a first shielding plate 61, a back plate 91, a display screen 93 and a second shielding plate 62 arranged on the housing frame 92. The housing frame 92 includes a carrier plate 921 and a baffle plate 922 arranged around the carrier plate 921. The antenna unit 4 in the figure is located between the back plate 91 and the baffle plate 922, and the display screen 93 is located on the side of the carrier plate 921 away from the antenna unit 4. The electronic device includes but is not limited to a mobile phone, a watch or a tablet computer.

[0081] Figure 3 Schematic diagram of the structure of the antenna assembly, the first shielding plate 61 and the circuit board 7 according to an embodiment of the present invention. Figure 4 1 is a schematic diagram of the structure of the antenna assembly and the circuit board 7 according to an embodiment of the present invention. The antenna unit 4 in the figure is electrically connected to the circuit board 7 through the second electrical connector 82 and the first electrical connector 81.

[0082] Figure 5 Schematic diagram of the structure of the parasitic radiation unit 2 according to an embodiment of the present invention. Figure 6 It is a schematic structural diagram of the main radiation part 1 according to an embodiment of the present invention. Figure 7 3 is a schematic structural diagram of the grounding portion 3 according to an embodiment of the present invention. Figure 84 is a schematic diagram of the structure of the antenna unit 4 according to an embodiment of the present invention. Figure 1-8 The outline of the antenna unit 4 is shown with a thick solid line. The first branch 11, the first sheet pattern 121, the first rectangular pattern 123 and the second rectangular pattern 124 in the main radiation part 1, the third rectangular pattern 21, the fifth rectangular pattern 25 and the fourth rectangular pattern 22 in the parasitic radiation part 2, and the second branch 32 and the third branch 33 in the ground part 3 are shown with dotted lines.

[0083] Fig. 9 1 is a simulation diagram of the guided electromagnetic wave in the antenna unit 4 of this embodiment. The direction indicated by the arrow in the figure is the conduction direction of the guided electromagnetic wave in the antenna unit 4. The size and density of the arrows are used to show the intensity of the electromagnetic wave in different areas.

[0084] In some embodiments, Figure 1-8 As shown, in this embodiment, the antenna assembly includes a substrate 5 and an antenna unit 4 arranged on one side of the substrate 5. The antenna unit 4 includes a main radiating portion 1, a grounding portion 3 and a parasitic radiating portion 2. The main radiating portion 1 includes an intermediate pattern 12, a first branch 11 and a feeding point 13 arranged on the intermediate pattern 12. The grounding portion 3 includes a grounding point 31. The grounding portion 3, the main radiating portion 1 and the parasitic radiating portion 2 are arranged in sequence and separated by gaps (such as Figure 8 ). The main radiating portion 1 is coupled with the ground portion 3 and the parasitic radiating portion 2. In the arrangement direction of the ground portion 3, the main radiating portion 1 and the parasitic radiating portion 2, the intermediate pattern 12 at least partially overlaps with the projection of the parasitic radiating portion 2 and the ground portion 3, and the first branch 11 at least partially overlaps with the projection of the ground portion 3 and is staggered with the parasitic radiating portion 2.

[0085] The middle pattern 12 in this embodiment is located between the parasitic radiation part 2 and the ground part 3. The feeding point 13 is provided on the middle pattern 12, so that the guided electromagnetic wave fed into the main radiation part 1 can be coupled with the parasitic radiation part 2 and the ground part 3, respectively, so as to broaden the working frequency band of the antenna unit 4. At the same time, the parasitic radiation part 2 only corresponds to a part of the main radiation part 1, and is staggered with the first branch 11. It can ensure that the parasitic radiation part 2 is coupled with the guided electromagnetic waves of a specific frequency band in the main radiation part 1. It is convenient for technicians in this field to adjust the frequency band of the parasitic radiation part 2 coupling the guided electromagnetic waves by changing the shape of the parasitic radiation part 2.

[0086] In the antenna assembly of this embodiment, the main radiating part 1, the parasitic radiating part 2 and the grounding part 3 are arranged together on the same board surface of the substrate 5, and the main radiating part 1 is arranged between the grounding part 3 and the parasitic radiating part 2. Therefore, the parasitic radiating part 2 is configured to correspond to the intermediate pattern 12, and the grounding part 3 is configured to correspond to the first branch 11 and the intermediate pattern 12 at the same time, so that the parasitic radiating part 2 cooperates with the grounding part 3 to broaden the working frequency band of the antenna assembly. On the other hand, the parasitic radiating part 2 is subjected to the electromagnetic induction effect of the main radiating part 1, thereby generating an induced current. The induced current enables the electromagnetic signal radiated by the parasitic radiating part 2 to be superimposed on the electromagnetic signal radiated by the main radiating part 1, thereby greatly increasing the radiation efficiency of the antenna assembly.

[0087] In some embodiments, Figure 5-8 As shown, one end of the first branch 11 is connected to the middle pattern 12. The ground portion 3 includes a second branch 32 and a third branch 33. The second branch 32 corresponds to the middle pattern 12, and the third branch 33 and the first branch 11 are located on the same side of the antenna unit 4. One end of the third branch 33 is connected to the end of the second branch 32, and the other end extends parallel to the end of the first branch 11 away from the middle pattern 12.

[0088] In this embodiment, by configuring the extending directions of the first branch 11 and the third branch 33, the length of the opposite side edges of the grounding portion 3 and the main radiation portion 1 is increased. Fig. 9 As shown, it can be seen that the coupling effect between the first branch 11 and the third branch 33 is improved, and the intensity of the guided electromagnetic waves at the opposite side edges of the ground portion 3 and the main radiation portion 1 is relatively large.

[0089] In some embodiments, Figure 5-8 As shown, the middle pattern 12 includes a first sheet pattern 121. One end of the first sheet pattern 121 is connected to the end of the first branch 11, and the other end extends parallel to the end of the second branch 32 away from the third branch 33. Fig. 9 As shown, in this embodiment, the lengths of the opposite side edges of the first sheet pattern 121 and the second branch 32 are increased to improve the coupling effect between the main radiation portion 1 and the ground portion 3 and reduce the layout area of ​​the ground portion 3 .

[0090] Furthermore, the first sheet pattern 121 is a rectangular sheet with unequal lengths of adjacent sides. The length of the first sheet pattern 121 is consistent with the length of the second branch 32 (eg Figure 8 The open end of the first sheet pattern 121 is aligned with the open end of the second branch 32. The length of the third branch 33 is less than the length of the first branch 11.

[0091] Specifically, the grounding point 31 is close to an end of the second branch 32 that is away from the third branch 33. Fig. 9 As shown, in this embodiment, the guided electromagnetic waves at the edge of the main radiating portion 1 close to the grounding portion 3 are all conducted toward the connection position between the first sheet pattern 121 and the first branch 11. As a result, it is convenient for the guided electromagnetic waves of the main radiating portion 1 to be gathered in the middle and then continue to be conducted to the parasitic radiating portion 2. On the other hand, the induced current at the edge of the grounding portion 3 flows in the opposite direction to the current at the edge of the main radiating portion 1, which can facilitate it to flow to the grounding point 31 to broaden the working frequency band of the antenna assembly.

[0092] Furthermore, if Figure 8 As shown, the width of the first sheet pattern 121 is consistent with the width of the second branch 32 (that is, the distance L11 is equal to the distance L12). The width of the third branch 33 is consistent with the first branch 11 (that is, the distance L13 is equal to the distance L14). Therefore, this embodiment makes the shape of the side of the main radiating portion 1 close to the ground portion 3 similar to the ground portion 3, so as to improve the coupling effect between the ground portion 3 and the main radiating portion 1. Those skilled in the art can adjust the coupling effect between the ground portion 3 and the main radiating portion 1 by changing the length of the third branch 33. In addition, the ground portion 3 is located on the side of the main radiating portion 1 away from the parasitic radiating portion 2, and uses the second branch 32 corresponding to the parasitic radiating portion 2, so that Figure 8 In the direction indicated by the middle arrow, the potential coupled to the parasitic radiating portion 2 is kept as consistent as possible, so that those skilled in the art can adjust the induced current on the parasitic radiating portion 2 by changing the positional relationship between the parasitic radiating portion 2 and the main radiating portion 1 .

[0093] In some embodiments, Figure 6-8 As shown, the first branch 11 has a first transverse edge 111, and the third branch 33 has a second transverse edge 331. The first transverse edge 111 is located at the open end of the first branch 11, and the second transverse edge 331 is located at the open end of the third branch 33, and the first transverse edge 111 and the second transverse edge 331 are parallel to the short side of the first sheet pattern 121.

[0094] Specifically, refer to Fig. 9 As shown, in this embodiment, the open end of the third branch 33 is located at the end of the extension direction of the third branch 33, and the open end of the first branch 11 is located at the end of the extension direction of the first branch 11. The length direction of the first transverse edge 111 and the second transverse edge 331 is consistent with the arrangement direction of the ground portion 3, the main radiation portion 1 and the parasitic radiation portion 2. Further, the distances from each point on the first transverse edge 111 and the second transverse edge 331 to the first sheet pattern 121 and the second branch 32 are the same, ensuring that the guided electromagnetic wave can be conducted along its length direction.

[0095] In some embodiments, Figure 6-8As shown, the middle pattern 12 includes a first sheet pattern 121 and a second sheet pattern 122. The first sheet pattern 121 is a rectangular sheet with adjacent sides of unequal lengths. One end of the first branch 11 is connected to the short side of the first sheet pattern 121, and the other end extends in a direction away from the parasitic radiation portion 2. One end of the second sheet pattern 122 is connected to the long side of the first sheet pattern 121, and the other end extends toward the parasitic radiation portion 2. In addition, the first branch 11 is arranged at an oblique angle relative to the long side of the first sheet pattern and the long side of the second sheet pattern (such as Figure 6 The two arrows in the figure indicate the direction of the rotation.

[0096] Further reference Fig. 9 As shown, in this embodiment, the second sheet pattern 122 can conduct the guided electromagnetic wave of the first sheet pattern 121 to the parasitic radiation portion 2, so as to couple with the parasitic radiation portion 2. At the same time, the first sheet pattern 121 and the second branch 32 are in a corresponding state. Therefore, the guided electromagnetic wave transmitted from the first sheet pattern 121 to the second sheet pattern 122 is in the width direction of the second sheet pattern 122 ( Figure 8 The electric potential at each position (in the vertical direction indicated by the arrow in the middle) can be kept as consistent as possible to ensure that the parasitic radiation portion 2 can generate a stable induced current.

[0097] In some embodiments, Figure 5-8 As shown, the second sheet pattern 122 includes a first longitudinal edge 1221 and a second longitudinal edge 1222 in its extending direction. The short side of the first sheet pattern 121 connected to the first branch 11 is aligned with the first longitudinal edge 1221 , and the other short side is away from the first branch 11 relative to the second longitudinal edge 1222 .

[0098] Specifically, refer to Figure 6 and Fig. 9 As shown, in this embodiment, the first longitudinal edge 1221 is connected to a side edge of the first branch 11, so that the guided electromagnetic wave on the first branch 11 can be conducted to the first longitudinal edge 1221 along the edge of the first branch 11. In contrast, the second longitudinal edge 1222 is closer to the first longitudinal edge 1221 relative to the feeding point 13, so that the second sheet pattern 122 can better couple with the parasitic radiation portion 2 after collecting the guided electromagnetic wave of the first sheet pattern 121.

[0099] In some embodiments, Figure 5-8As shown, the extension direction of the parasitic radiation portion 2 is consistent with the extension direction of the second sheet pattern 122. The extension direction of the parasitic radiation portion 2 includes a third longitudinal edge 23 and a fourth longitudinal edge 24. The third longitudinal edge 23 is aligned with the first longitudinal edge 1221, and the fourth longitudinal edge 24 is aligned with the second longitudinal edge 1222. In this embodiment, the width and position of the parasitic radiation portion 2 are adapted to the width and position of the second sheet pattern 122, so that the efficiency of mutual conduction of electromagnetic signals between the two is higher, and the potential difference generated in the width direction of the parasitic radiation portion 2 is reduced.

[0100] In some embodiments, Figure 5-8 As shown, the second sheet pattern 122 includes a first rectangular pattern 123 and a second rectangular pattern 124. The first rectangular pattern 123 and the second rectangular pattern 124 extend in parallel from the long side of the first sheet pattern 121 to the parasitic radiation portion 2, and the length of the first rectangular pattern 123 is less than the length of the second rectangular pattern 124. In contrast, the parasitic radiation portion 2 includes a third rectangular pattern 21 and a fourth rectangular pattern 22 whose adjacent sides are unequal in length. The third rectangular pattern 21 and the fourth rectangular pattern 22 extend in parallel, and the ends of the third rectangular pattern 21 and the fourth rectangular pattern 22 away from the main radiation portion 1 are electrically connected. The third rectangular pattern 21 corresponds to the first rectangular pattern 123, and the fourth rectangular pattern 22 corresponds to the second rectangular pattern 124.

[0101] Specifically, the sides of the third rectangular pattern 21 and the fourth rectangular pattern 22 that are away from each other form a third longitudinal edge 23 and a fourth longitudinal edge 24, respectively. Partial areas of the opposite side edges of the third rectangular pattern 21 and the fourth rectangular pattern 22 that are away from the main radiation portion 1 are electrically connected, and there is a certain interval between the partial areas close to the main radiation portion 1. The edges of the first rectangular pattern 123 and the second rectangular pattern 124 that are away from each other form a first longitudinal edge 1221 and a second longitudinal edge 1222, respectively, and the first rectangular pattern 123 and the second rectangular pattern 124 are assembled into a second sheet pattern 122 through the sides that are close to each other.

[0102] In this embodiment, the distances from the first rectangular pattern 123 and the second rectangular pattern 124 to the parasitic radiation portion 2 are different. When the main radiation portion 1 couples electromagnetic signals to the third rectangular pattern 21 and the fourth rectangular pattern 22, an electric potential difference can be generated on the parasitic radiation portion 2 so that the induced current on the parasitic radiation portion 2 can be transmitted along the extension direction of the parasitic radiation portion 2.

[0103] In some embodiments, Figure 5-8 As shown, the length of the third rectangular pattern 21 is greater than the length of the fourth rectangular pattern 22, and the distance between the third rectangular pattern 21 and the first rectangular pattern 123 is less than the distance between the fourth rectangular pattern 22 and the second rectangular pattern 124 (as shown in FIG. Fig. 9 The middle distance L1 is greater than the distance L4 (as shown).

[0104] Further reference Fig. 9 As shown, when the second sheet pattern 122 transmits an electromagnetic signal to the parasitic radiation portion 2, the third rectangular pattern 21 and the first rectangular pattern 123 that are close to each other make the electromagnetic signal preferentially transmitted from the open end of the third rectangular pattern 21 to the fourth rectangular pattern 22. That is, the potential of the open end of the third rectangular pattern 21 is greater than the potential of the open end of the fourth rectangular pattern 22. Thus, it is ensured that the parasitic radiation portion 2 can generate an induced electric field that can be superimposed on the electromagnetic signal of the main radiation portion 1.

[0105] In some embodiments, Figure 5-8 As shown, the parasitic radiation portion 2 further includes a fifth rectangular pattern 25. The fifth rectangular pattern 25 is connected between the third rectangular pattern 21 and the fourth rectangular pattern 22, and the fifth rectangular pattern 25, the fourth rectangular pattern 22 and the third rectangular pattern 21 are aligned away from the side of the main radiation portion 1. In the length direction of the third rectangular pattern 21, the third rectangular pattern 21 and the fifth rectangular pattern 25 correspond to the first rectangular pattern 123. In the width direction of the third rectangular pattern 21, the open end of the third rectangular pattern 21 corresponds at least partially to the open end of the second rectangular pattern 124.

[0106] Figure 8 Area I in the figure shows a specific form, and the difference between the distance L5 and the distance L4 in the figure is the size corresponding to the open end of the third rectangular pattern 21 and the open end of the second rectangular pattern 124. Fig. 9 As shown, the second sheet pattern 122 is arranged around a portion of the open end of the third rectangular pattern 21 , which can increase the coupling effect between the main radiation portion 1 and the parasitic radiation portion 2 so that the induced current is conducted along the length direction of the third rectangular pattern 21 .

[0107] Specifically, Figure 8 The middle distance L1 is 5.5 mm, the distance L2 is 7 mm, the distance L3 is 10.2 mm, the distance L4 is 0.6 mm, the distance L5 is 3.4 mm, the distance L6 is 5.2 mm, the distance L7 is 18.5 mm, the distance L8 is 1.6 mm, and the distance L9 is 1.8 mm.

[0108] In some embodiments, Figure 5-8 As shown, the distances between the opposite side edges of the third rectangular pattern 21 to the fourth rectangular pattern 22 , the second rectangular pattern 124 and the first rectangular pattern 123 are the same.

[0109] Further reference Fig. 9As shown in the figure, the current intensity on the third rectangular pattern 21 is relatively high, especially at the edge position on the opposite side of the third rectangular pattern 21 and the fourth rectangular pattern 22. Therefore, the parasitic radiation portion 2 can conduct the electromagnetic signal on the main radiation portion 1 to the fourth rectangular pattern 22 through the third rectangular pattern 21, so that the parasitic radiation portion 2 generates an induced magnetic field.

[0110] In an optional implementation, the antenna assembly in the above embodiment may be applied to an electronic device, such as Figure 1-8 As shown, the electronic device in this embodiment includes a circuit board 7 and an antenna unit 4. The circuit board 7 includes a first contact and a second contact. The antenna assembly includes a first electrical connector 81, a second electrical connector 82, a substrate 5, and an antenna unit 4 arranged on one side of the substrate 5. The antenna unit 4 includes a main radiating portion 1, a grounding portion 3, and a parasitic radiating portion 2. The main radiating portion 1 includes an intermediate pattern 12, a first branch 11, and a feeding point 13 arranged on the intermediate pattern 12. The grounding portion 3 includes a grounding point 31. The feeding point 13 is electrically connected to the first contact through the first electrical connector 81, and the grounding point 31 is electrically connected to the second contact through the second electrical connector 82. That is, the first contact is used for the circuit board 7 to feed electromagnetic signals to the antenna unit 4, and the second contact is used for grounding the antenna unit 4. The grounding portion 3, the main radiating portion 1, and the parasitic radiating portion 2 are arranged in sequence, and the main radiating portion 1 is coupled with the grounding portion 3 and the parasitic radiating portion 2. In the arrangement direction of the ground portion 3 , the main radiating portion 1 and the parasitic radiating portion 2 , the parasitic radiating portion 2 overlaps with the projection of at least part of the middle pattern 12 , and the ground portion 3 overlaps with the projection of at least part of the middle pattern 12 and at least part of the first branch 11 .

[0111] Preferably, the substrate 5 in this embodiment is a plastic plate, and the antenna unit 4 is formed on the surface of the plastic plate by a surface treatment process such as laser engraving. Two via holes are provided on the plastic plate, and the first electrical connector 81 and the second electrical connector 82 can be disposed in the two via holes to achieve electrical connection between the antenna unit 4 and the circuit board 7.

[0112] In the electronic device of this embodiment, the main radiating part 1, the parasitic radiating part 2 and the grounding part 3 are arranged together on the same board surface of the substrate 5, and the main radiating part 1 is arranged between the grounding part 3 and the parasitic radiating part 2. Thus, the parasitic radiating part 2 is configured to correspond to the intermediate pattern 12, and the grounding part 3 is configured to correspond to the first branch 11 and the intermediate pattern 12 at the same time, so that the parasitic radiating part 2 cooperates with the grounding part 3 to broaden the working frequency band of the antenna assembly. On the other hand, the parasitic radiating part 2 is subjected to the electromagnetic induction effect of the main radiating part 1, thereby generating an induced current. The induced current enables the electromagnetic signal radiated by the parasitic radiating part 2 to be superimposed on the electromagnetic signal radiated by the main radiating part 1, thereby greatly increasing the radiation efficiency of the antenna assembly.

[0113] Fig.101 is a schematic diagram of the structure of the antenna unit 4 of this embodiment and the first shielding plate 61 and the second shielding plate 62. In the figure, the edges of the first shielding plate 61 and the second shielding plate 62 are shown with thick solid lines, and the outline of the antenna unit 4 is shown with dotted lines.

[0114] In some embodiments, Figure 1-10 As shown, in this embodiment, the electronic device further includes a first shielding plate 61 and a second shielding plate 62. The circuit board 7 is disposed between the first shielding plate 61 and the second shielding plate 62, the substrate 5 is disposed on the side of the first shielding plate 61 away from the second shielding plate 62, and the antenna unit 4 is located on the side of the substrate 5 away from the first shielding plate 61. The grounding portion 3 includes a second branch 32 and a third branch 33, the second branch 32 corresponds to the middle pattern 12, the third branch 33 and the first branch 11 are located on the same side of the antenna unit 4, one end of the third branch 33 is connected to the end of the second branch 32, and the other end extends parallel to the end of the first branch 11 away from the middle pattern 12. The parasitic radiation portion 2 includes a third rectangular pattern 21 and a fourth rectangular pattern 22 with adjacent sides of unequal length, the third rectangular pattern 21 and the fourth rectangular pattern 22 extend in parallel, and the ends of the third rectangular pattern 21 and the fourth rectangular pattern 22 away from the main radiation portion 1 are electrically connected and correspond to the middle pattern 12. In the thickness direction of the first shielding plate 61, the second branch 32, the third branch 33, part of the first branch 11, part of the third rectangular pattern 21 and part of the middle pattern 12 are staggered with the first shielding plate 61, and the parasitic radiation part 2, the third branch 33 and the first branch 11 correspond to the second shielding plate 62.

[0115] Specifically, in the thickness direction of the first shielding plate 61, the grounding portion 3, part of the first branch 11, part of the third rectangular pattern 21, part of the first rectangular pattern 123 and part of the first sheet pattern 121 are staggered from the edge of the first shielding plate 61. One long side of the first sheet pattern 121 partially overlaps with the side edge of the first shielding plate 61.

[0116] The first shielding plate 61 in this embodiment corresponds to a part of the antenna unit 4, which can prevent the antenna unit 4 from interfering with the internal components of the electronic device, while ensuring that the antenna unit 4 can radiate electromagnetic signals to the outside of the electronic device. The second shielding plate 62 can prevent the antenna unit 4 from interfering with the display screen 93.

[0117] Fig.11 : is a schematic diagram of the return loss simulation of the antenna unit 4 of this embodiment. Curve I in the figure is the simulation result of the return loss of the antenna unit 4 in this embodiment. Curve II is the simulation result of the return loss of the antenna unit 4 after removing the parasitic radiation part 2. It can be seen from the figure that the antenna unit 4 of this embodiment is in the 3.5GHz-4GHz frequency band, and curve I will produce a sunken area. Therefore, the parasitic radiation part 2 broadens the operating frequency band of the antenna assembly and increases the radiation efficiency.

[0118] Fig.12 : is a schematic diagram of the total efficiency simulation of the antenna unit 4 of this embodiment. Curve III in the figure is the simulation result of the radiation efficiency of the antenna unit 4 of this embodiment. Curve IV is the simulation result of the radiation efficiency of the antenna unit 4 after removing the parasitic radiation part 2. It can be seen from the figure that the radiation efficiency of the antenna unit 4 of this embodiment in the 3.5GHz-4GHz frequency band is significantly enhanced compared with curve IV.

[0119] Fig.13 3.7 GHz points in the figure are concentrated at the center of the Smith chart. It can be seen that the antenna unit 4 has a good impedance matching design.

[0120] 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: a substrate (5); and An antenna unit (4) is arranged on one side of the substrate (5) and comprises a main radiating portion (1), a grounding portion (3) and a parasitic radiating portion (2), wherein the main radiating portion (1) comprises an intermediate pattern (12), a first branch (11) and a feeding point (13) arranged on the intermediate pattern (12), and the grounding portion (3) comprises a grounding point (31); The grounding portion (3), the main radiating portion (1) and the parasitic radiating portion (2) are arranged in sequence and separated by gaps, and the main radiating portion (1) is coupled with the grounding portion (3) and the parasitic radiating portion (2); The intermediate pattern (12) comprises a first sheet-shaped pattern (121), the first sheet-shaped pattern (121) being a rectangular sheet with adjacent sides of unequal lengths, and the short side of the first sheet-shaped pattern (121) being connected to the first branch (11); The grounding portion (3) comprises a third branch (33), the third branch (33) and the first branch (11) are located on the same side of the antenna unit (4), the first branch (11) extends parallel to the third branch (33), and the open end of the first branch (11) is inclined in a direction away from the parasitic radiation portion (2).

2. The antenna assembly according to claim 1, characterized in that: The grounding portion (3) further comprises a second branch node (32), the second branch node (32) being rectangular and having the same width and length as the first sheet pattern (121), and the short side of the second branch node (32) being connected to the short side of the third branch node (33).

3. The antenna assembly according to claim 2, characterized in that: The length of the third branch node (33) is shorter than the length of the first branch node (11), and the width of the third branch node (33) is the same as that of the first branch node (11).

4. The antenna assembly according to claim 3, characterized in that: The first branch node (11) has a first transverse edge (111), and the third branch node (33) has a second transverse edge (331); The first transverse edge (111) is located at the open end of the first branch node (11), the second transverse edge (331) is located at the open end of the third branch node (33), and the first transverse edge (111) and the second transverse edge (331) are parallel to the short side of the first sheet pattern (121).

5. The antenna assembly according to claim 2, characterized in that: The grounding point (31) is located on the second branch node (32), and in the width direction of the second branch node (32), the grounding point (31) is located at the center of the second branch node (32), and the grounding point (31) is far away from the third branch node (33).

6. An electronic device, characterized in that: The electronic device comprises: A circuit board (7) comprising a first contact and a second contact; and An antenna assembly, comprising a first electrical connector (81), a second electrical connector (82), a substrate (5), and an antenna unit (4) arranged on one side of the substrate (5); the antenna unit (4) comprises a main radiating portion (1), a grounding portion (3), and a parasitic radiating portion (2); the main radiating portion (1) comprises an intermediate pattern (12), a first branch (11), and a feeding point (13) arranged on the intermediate pattern (12); the grounding portion (3) comprises a grounding point (31); the feeding point (13) is electrically connected to the first contact through the first electrical connector (81); and the grounding point (31) is electrically connected to the second contact through the second electrical connector (82); The grounding portion (3), the main radiating portion (1) and the parasitic radiating portion (2) are arranged in sequence and spaced apart from each other, and the main radiating portion (1) is coupled with the grounding portion (3) and the parasitic radiating portion (2); The intermediate pattern (12) comprises a first sheet-shaped pattern (121), the first sheet-shaped pattern (121) being a rectangular sheet with adjacent sides of unequal lengths, and the short side of the first sheet-shaped pattern (121) being connected to the first branch (11); The grounding portion (3) comprises a third branch (33), the third branch (33) and the first branch (11) are located on the same side of the antenna unit (4), the first branch (11) extends parallel to the third branch (33), and the open end of the first branch (11) is inclined in a direction away from the parasitic radiation portion (2).

7. The electronic device according to claim 6, characterized in that: The electronic device further comprises a first shielding plate (61) and a second shielding plate (62); The circuit board is arranged between the first shielding plate (61) and the second shielding plate (62).

8. The electronic device according to claim 7, characterized in that: The substrate (5) has two via holes, and the first electrical connector (81) and the second electrical connector (82) are respectively arranged in the two via holes; The substrate (5) is arranged on a side of the first shielding plate (61) away from the second shielding plate (62), and the antenna unit is located on a side of the substrate (5) away from the first shielding plate (61).

9. The electronic device according to claim 8, characterized in that: The grounding portion (3) further comprises a second branch node (32), the second branch node (32) is rectangular and has the same width and length as the first sheet pattern (121), and the short side of the second branch node (32) is connected to the short side of the third branch node (33); In the thickness direction of the first shielding plate (61), the second branch node (32) and the third branch node (33) are staggered from the first shielding plate (61) and partially correspond to the second shielding plate (62).

10. The electronic device according to claim 9, characterized in that: In the thickness direction of the first shielding plate (61), part of the first branch nodes (11) is staggered from the first shielding plate (61) and corresponds to the second shielding plate (62); One long side of the first sheet pattern (121) partially overlaps with a side edge of the first shielding plate (61).

Images