CN117276870A - Antenna assembly and electronic equipment - Google Patents

Abstract

Embodiments of the present invention disclose an antenna assembly and an electronic device, in which a main radiating part, a parasitic radiating part and a grounding part are arranged together on the same surface of a substrate, and at the same time, the main radiating part is arranged at intervals between the grounding part and the parasitic radiating part. between. Therefore, the parasitic radiation part is configured to correspond to the middle pattern, and the ground part is configured to correspond to both the first branch and the middle pattern, so that the parasitic radiation part cooperates with the ground part to broaden the operating frequency band of the antenna assembly. On the other hand, the parasitic radiation part is affected by the electromagnetic induction of the main radiation part, thereby generating an induced current. This induced current enables the electromagnetic signals radiated by the parasitic radiation part to be superimposed on the electromagnetic signals radiated by the main radiation part, thereby greatly increasing the radiation efficiency of the antenna assembly.

Description

Antenna components and electronic equipment

Technical field

The present invention relates to the field of communication technology, and in particular, to an antenna assembly and an electronic device.

Background technique

With the continuous popularization of communication technology, the performance requirements for antennas in communication equipment are becoming higher and higher. At the same time, the number of antenna arrangements in communication equipment has increased, resulting in the need to consider the antenna arrangement location and performance parameters when designing antennas. In addition, shielding covers in electronic equipment will also have an impact on the layout of the antenna. How to improve the performance of antennas and facilitate the arrangement of antennas in electronic devices has become a problem that needs to be solved.

Contents of the invention

In view of this, embodiments of the present invention provide an antenna assembly and an electronic device, which couple the main radiating part with the parasitic radiating part and the grounding part, so as to use the parasitic radiating part and the grounding part to broaden the working frequency band of the antenna assembly and increase the Radiation efficiency.

According to a first aspect of an embodiment of the present invention, an antenna assembly is provided. The antenna assembly includes:

substrate; and

The antenna unit is arranged on one side of the substrate and includes a main radiation part, a ground part and a parasitic radiation part. The main radiation part includes a middle pattern, a first branch and a feed point provided in the middle pattern. The ground part includes a ground point;

The ground part, the main radiation part and the parasitic radiation part are arranged in sequence and separated by gaps, and the main radiation part is coupled with the ground part and the parasitic radiation part;

In the arrangement direction of the ground part, the main radiation part and the parasitic radiation part, the intermediate pattern at least partially coincides with the projection of the parasitic radiation part and the ground part, and the projection of the first branch and the ground part at least partially overlaps and is offset from the parasitic radiation part.

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

The grounding part 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. , the other end extends parallel to the end of the first branch away from the middle pattern.

Further, the intermediate pattern includes a first sheet pattern, one end of the first sheet pattern is connected to the end of the first branch, and the other end extends in parallel with an end of the second branch away from the third branch.

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

The length of the third branch is less than the length of the first branch.

Further, the first branch has a first transverse edge, and the third branch has a second transverse edge;

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.

Further, the width of the first sheet pattern is consistent with the width of the second branch,

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

Further, the intermediate patterns include:

A first sheet pattern, the first sheet pattern is a rectangular sheet with adjacent sides of unequal lengths, one end of the first branch is connected to the short side of the first sheet pattern, and the other end extends in a direction away from the parasitic radiation part; as well as

The second sheet-like pattern has one end connected to the long side of the first sheet-like pattern, and the other end extends toward the parasitic radiation part.

Further, the extension direction of the second sheet-like pattern includes a first longitudinal edge and a second longitudinal edge, the short side of the first sheet-like pattern connected to the first branch is aligned with the first longitudinal edge, and the other short side is opposite to The second longitudinal edge is away from the first branch.

Further, the first branches are arranged at an oblique angle relative to the long sides of the first sheet-like pattern and the long sides of the second sheet-like pattern.

Further, the extension direction of the parasitic radiation part is consistent with the extension direction of the second sheet pattern;

The extension direction of the parasitic radiation part includes a third longitudinal edge and a fourth longitudinal edge. The third longitudinal edge is aligned with the first longitudinal edge, and the fourth longitudinal edge is aligned with the second longitudinal edge.

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 in parallel from the long side of the first sheet pattern toward the parasitic radiation portion, and the first rectangular pattern has The length is less than the length of the second rectangular pattern;

The parasitic radiation part includes a third rectangular pattern and a fourth rectangular pattern with adjacent sides of unequal length, the third rectangular pattern and the fourth rectangular pattern extend in parallel, and the ends of the third rectangular pattern and the fourth rectangular pattern away from the main radiation part are electrically Sexual connection, the third rectangular pattern corresponds to the first rectangular pattern, and the fourth rectangular pattern corresponds to the second rectangular pattern.

Further, the length of the third rectangular pattern is greater than the length of the fourth rectangular pattern, and the distance between the opposite side edges of the third rectangular pattern and the first rectangular pattern is smaller than the distance between the opposite side edges of the fourth rectangular pattern and the second rectangular pattern.

Further, the parasitic radiation part 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 away from the main radiation part. side alignment;

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

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

In a second aspect, embodiments of the present invention also provide an electronic device. The electronic device includes:

a circuit board including a first contact and a second contact; and

The antenna assembly includes a first electrical connector, a second electrical connector, a substrate and an antenna unit arranged on one side of the substrate. The antenna unit includes a main radiation part, a ground part and a parasitic radiation part. The main radiation part includes an intermediate pattern, a first branches and feed points arranged in the middle pattern, the ground portion includes a ground point, the feed point is electrically connected to the first contact through the first electrical connector, and the ground point is electrically connected to the second contact through the second electrical connector. sexual connection;

The ground part, the main radiation part and the parasitic radiation part are arranged in sequence, and the main radiation part is coupled with the ground part and the parasitic radiation part;

In the arrangement direction of the ground part, the main radiation part and the parasitic radiation part, the parasitic radiation part coincides with the projection of at least part of the intermediate pattern, and the ground part coincides with the projection of at least part of the intermediate pattern and at least part of the first branch.

Further, the electronic device further includes a first shielding plate and a second shielding plate;

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;

The grounding part 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. , the other end extends parallel to the end of the first branch away from the middle pattern;

The parasitic radiation part includes a third rectangular pattern and a fourth rectangular pattern with adjacent sides of unequal length, the third rectangular pattern and the fourth rectangular pattern extend in parallel, and the ends of the third rectangular pattern and the fourth rectangular pattern away from the main radiation part are electrically Sexuality connects and corresponds to the middle pattern;

In the thickness direction of the first shielding plate, the second branches, the third branches, part of the first branches, part of the third rectangular pattern and part of the intermediate pattern are staggered from the first shielding plate, and the parasitic radiation part, the third branch and The first branch corresponds to the second shielding plate.

In the antenna assembly and electronic device according to the embodiment of the present invention, the main radiating part, the parasitic radiating part and the ground part are arranged together on the same surface of the substrate, and the main radiating part is spaced between the ground part and the parasitic radiating part. Therefore, the parasitic radiation part is configured to correspond to the middle pattern, and the ground part is configured to correspond to both the first branch and the middle pattern, so that the parasitic radiation part cooperates with the ground part to broaden the operating frequency band of the antenna assembly. On the other hand, the parasitic radiation part is affected by the electromagnetic induction of the main radiation part, thereby generating an induced current. This induced current enables the electromagnetic signals radiated by the parasitic radiation part to be superimposed on the electromagnetic signals radiated by the main radiation part, thereby greatly increasing the radiation efficiency of the antenna assembly.

Description of the drawings

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

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

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

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

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

Figure 5 is a schematic structural diagram of the parasitic radiation part according to the embodiment of the present invention;

Figure 6 is a schematic structural diagram of the main radiation part according to the embodiment of the present invention;

Figure 7 is a schematic structural diagram of the grounding part according to the embodiment of the present invention;

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

Figure 9 is a simulation diagram of guided electromagnetic waves in the antenna unit according to the embodiment of the present invention;

Figure 10 is a schematic structural diagram of the antenna unit, the first shielding plate and the second shielding plate according to the embodiment of the present invention;

Figure 11 is a schematic diagram of the return loss simulation of the antenna unit according to the embodiment of the present invention;

Figure 12 is a schematic diagram of the total efficiency simulation of the antenna unit according to the embodiment of the present invention;

Figure 13 is a Smith simulation schematic diagram of the antenna unit according to the embodiment of the present invention.

Explanation of reference symbols:

1-Main radiation part;

11-the first branch; 111-the first transverse edge;

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;

13-Feeding point;

2-Parasitic radiation part;

21-The third rectangular pattern; 22-The fourth rectangular pattern; 23-The third vertical edge; 24-The fourth vertical edge; 25-The fifth rectangular pattern;

3-Grounding part;

31-Grounding point;

32-The second branch;

33-The third branch; 331-The second transverse edge;

4-antenna unit;

5-Substrate;

61-the first shielding plate; 62-the second shielding plate;

7-circuit board;

81-the first electrical connector; 82-the second electrical connector;

91-back plate; 92-accommodating rack; 921-carrying plate; 922-baffle; 93-display screen.

Detailed ways

The present invention will be described below based on examples, but the present invention is not limited only to these examples. In the following detailed description of the invention, specific details are set forth. It is possible for a person skilled in the art to fully understand the present invention without these detailed descriptions. In order to avoid obscuring the essence of the present invention, well-known methods, procedures, flows, components and circuits have not been described in detail.

Furthermore, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless the context clearly requires it, the words "including", "includes" and other similar words throughout the application documents shall be interpreted as having an inclusive meaning rather than an exclusive or exhaustive meaning; that is, the meaning of "including but not limited to".

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

Unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; It can be a direct connection or an indirect connection through an intermediate medium. It can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

For ease of explanation, spatially relative terms such as "inner", "outer", "under", "below", "lower", "above", "upper", etc. are used herein to describe one illustrated in the figures. The relationship of an element or feature to another element or feature. It will be understood that the spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Figure 1 is a schematic structural diagram of the electronic device of this embodiment. FIG. 2 is an exploded schematic diagram of the electronic device of this embodiment. The electronic device in the figure includes a receiving 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 receiving frame 92. The receiving rack 92 includes a bearing plate 921 and a baffle 922 arranged around the bearing plate 921 . In the figure, the antenna unit 4 is located between the back plate 91 and the baffle 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 mobile phones, watches or tablets.

FIG. 3 is a schematic structural diagram of the antenna assembly, the first shielding plate 61 and the circuit board 7 according to the embodiment of the present invention. Figure 4 is a schematic structural diagram of the antenna assembly and circuit board 7 according to the 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 .

FIG. 5 is a schematic structural diagram of the parasitic radiation part 2 according to the embodiment of the present invention. Figure 6 is a schematic structural diagram of the main radiation part 1 according to the embodiment of the present invention. FIG. 7 is a schematic structural diagram of the grounding part 3 according to the embodiment of the present invention. Figure 8 is a schematic structural diagram of the antenna unit 4 according to the embodiment of the present invention. The outline of antenna unit 4 in Figure 1-8 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, and the third rectangular pattern 21, the fifth rectangular pattern 25 and the fourth rectangular pattern 25 in the parasitic radiation part 2. The rectangular pattern 22 and the separated positions of the second and third branches 32 and 33 in the ground portion 3 are shown with dotted lines.

Figure 9 is a schematic diagram of a simulation of guided electromagnetic waves 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 electromagnetic waves in different areas.

In some implementations, as shown in FIGS. 1-8 , the antenna assembly in this embodiment includes a substrate 5 and an antenna unit 4 arranged on one side of the substrate 5 . The antenna unit 4 includes a main radiation part 1, a ground part 3 and a parasitic radiation part 2. The main radiation part 1 includes a middle pattern 12, a first branch 11 and a feed point 13 provided on the middle pattern 12. The ground part 3 includes a ground Location 31. The ground part 3, the main radiation part 1 and the parasitic radiation part 2 are arranged in sequence and separated by gaps (as shown by the arrows in Figure 8). The main radiation part 1 is coupled to the ground part 3 and the parasitic radiation part 2 . In the arrangement direction of the ground part 3, the main radiation part 1 and the parasitic radiation part 2, the intermediate pattern 12 at least partially overlaps the projection of the parasitic radiation part 2 and the ground part 3, and the projection of the first branch 11 and the ground part 3 at least partially overlaps. Coincident with and staggered from the parasitic radiation part 2.

The intermediate pattern 12 in this embodiment is located between the parasitic radiation part 2 and the ground part 3 . Setting the feed point 13 on the middle pattern 12 allows the guided electromagnetic waves fed into the main radiation part 1 to couple with the parasitic radiation part 2 and the ground part 3 respectively, thereby broadening the operating frequency band of the antenna unit 4. At the same time, the parasitic radiation part 2 only corresponds to a partial area of the main radiation part 1 and is staggered from the first branch 11 . It can be ensured that the guided electromagnetic waves in the specific frequency band in the parasitic radiation part 2 and the main radiation part 1 are coupled to each other. It is convenient for those skilled in the art to adjust the frequency band of the guided electromagnetic wave coupled by the parasitic radiation part 2 by changing the shape of the parasitic radiation part 2 .

In the antenna assembly in this embodiment, the main radiating part 1, the parasitic radiating part 2 and the grounding part 3 are arranged on the same surface of the substrate 5, and the main radiating part 1 is spaced apart from the grounding part 3 and the parasitic radiating part 2. between. Therefore, the parasitic radiation part 2 is configured to correspond to the middle pattern 12, and the ground part 3 is configured to correspond to both the first branches 11 and the middle pattern 12, so that the parasitic radiation part 2 cooperates with the ground part 3 to broaden the operating frequency band of the antenna assembly. . On the other hand, the parasitic radiation part 2 receives the electromagnetic induction from the main radiation part 1 and generates an induced current. This induced current allows the electromagnetic signal radiated by the parasitic radiation part 2 to be superposed with the electromagnetic signal radiated by the main radiation part 1, thereby greatly increasing the radiation efficiency of the antenna assembly.

In some embodiments, as shown in FIGS. 5-8 , one end of the first branch 11 is connected to the middle pattern 12 . The grounding part 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 .

This embodiment increases the length of the opposite side edges of the ground part 3 and the main radiation part 1 by arranging the extending directions of the first branch 11 and the third branch 33 . Further referring to FIG. 9 , it can be seen that the coupling effect between the first branch 11 and the third branch 33 has been improved, and the intensity of the guided electromagnetic waves at the opposite side edges of the ground part 3 and the main radiating part 1 is also relatively high. larger.

In some embodiments, as shown in FIGS. 5-8 , the intermediate 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 in parallel with an end of the second branch 32 away from the third branch 33 . Referring further to FIG. 9 , 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 part 1 and the ground part 3 and reduce the need for grounding. The layout area of Part 3.

Further, the first sheet pattern 121 is a rectangular sheet with adjacent sides having unequal lengths. The length of the first sheet pattern 121 is consistent with the length of the second branch 32 (shown as the distance L10 in FIG. 8 ), and 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 smaller than the length of the first branch 11 .

Specifically, the grounding point 31 is close to an end of the second branch 32 away from the third branch 33 . Referring further to FIG. 9 , in this embodiment, the guided electromagnetic waves at the edge of the main radiating part 1 close to the ground part 3 are all conducted toward the connection position between the first sheet pattern 121 and the first branch 11 . This makes it easier for the guided electromagnetic waves of the main radiation part 1 to be collected in the middle and then continue to be conducted to the parasitic radiation part 2 . On the other hand, the induced current at the edge of the grounding part 3 flows in the opposite direction to the current at the edge of the main radiating part 1, which can facilitate its flow to the grounding point 31, thereby broadening the operating frequency band of the antenna assembly.

Further, as shown in FIG. 8 , 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, in this embodiment, the shape of the main radiation part 1 close to the ground part 3 is similar to the ground part 3 , so as to improve the coupling effect between the ground part 3 and the main radiation part 1 . Those skilled in the art can adjust the coupling effect between the ground part 3 and the main radiation part 1 by changing the length of the third branch 33 . In addition, the ground part 3 is located on the side of the main radiation part 1 away from the parasitic radiation part 2, and uses the second branch 32 corresponding to the parasitic radiation part 2 to couple to the parasitic radiation part 2 in the direction indicated by the arrow in Figure 8 The potential should be kept as consistent as possible. This facilitates those skilled in the art to adjust the induced current on the parasitic radiation part 2 by changing the positional relationship between the parasitic radiation part 2 and the main radiation part 1 .

In some embodiments, as shown in Figures 6-8, 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 , 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 in contact with the first sheet pattern 121 The short sides are parallel to each other.

Specifically, further referring to FIG. 9 , 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 in the extension direction of the first branch 11 . the end of. 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 distance 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 is ensured to ensure that the guided electromagnetic wave can be conducted along its length direction.

In some embodiments, as shown in FIGS. 6-8 , the intermediate 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 away from the parasitic radiation part 2 . One end of the second sheet-like pattern 122 is connected to the long side of the first sheet-like pattern 121 , and the other end extends toward the parasitic radiation part 2 . In addition, the first branches 11 are arranged at an oblique angle relative to the long side of the first sheet-like pattern and the long side of the second sheet-like pattern (as shown by the two arrows in FIG. 6 ).

Referring further to FIG. 9 , in this embodiment, the second sheet pattern 122 can conduct the guided electromagnetic waves of the first sheet pattern 121 to the parasitic radiation part 2 to facilitate coupling with the parasitic radiation part 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 ( The potential at each position in the vertical direction (indicated by the arrow in FIG. 8 ) can be kept as consistent as possible to ensure that the parasitic radiation part 2 can generate a stable induced current.

In some embodiments, as shown in FIGS. 5-8 , the second sheet pattern 122 includes a first longitudinal edge 1221 and a second longitudinal edge 1222 in the 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 .

Specifically, further referring to FIGS. 6 and 9 , in this embodiment, the first longitudinal edge 1221 is connected to one side of the first branch 11 , so that the guided electromagnetic wave on the first branch 11 can be guided along the first branch 11 . The edge of one branch 11 is conducted to the first longitudinal edge 1221 . In contrast, the second longitudinal edge 1222 is closer to the first longitudinal edge 1221 relative to the feed point 13, so that the second sheet-like pattern 122 can better communicate with the conductive electromagnetic waves of the first sheet-shaped pattern 121 after collecting them. The parasitic radiation part 2 is coupled.

In some embodiments, as shown in FIGS. 5-8 , the extension direction of the parasitic radiation part 2 is consistent with the extension direction of the second sheet pattern 122 . The parasitic radiation part 2 includes a third longitudinal edge 23 and a fourth longitudinal edge 24 in the extending direction. 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 part 2 are adapted to the width and position of the second sheet pattern 122 , so that the electromagnetic signals can conduct each other more efficiently between the two and reduce the width of the parasitic radiation part 2 A potential difference occurs in the direction.

In some embodiments, as shown in FIGS. 5-8 , 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 toward the parasitic radiation part 2 , and the length of the first rectangular pattern 123 is shorter than the length of the second rectangular pattern 124 . In contrast, the parasitic radiation part 2 includes a third rectangular pattern 21 and a fourth rectangular pattern 22 with adjacent sides having unequal lengths. 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 part 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 .

Specifically, the sides of the third rectangular pattern 21 and the fourth rectangular pattern 22 that are far away from each other form a third longitudinal edge 23 and a fourth longitudinal edge 24 respectively. Partial regions of the opposite side edges of the third rectangular pattern 21 and the fourth rectangular pattern 22 away from the main radiating part 1 are electrically connected, and there is a certain distance between the partial regions close to the main radiating part 1 . The edges of the first rectangular pattern 123 and the second rectangular pattern 124 that are far away from each other form the first longitudinal edge 1221 and the second longitudinal edge 1222 respectively. Two-sheet pattern 122.

This embodiment makes the distances between the first rectangular pattern 123 and the second rectangular pattern 124 to the parasitic radiation part 2 different. When the main radiation part 1 couples electromagnetic signals to the third rectangular pattern 21 and the fourth rectangular pattern 22, the parasitic radiation can be reduced. A potential difference occurs on the parasitic radiation part 2 so that the induced current on the parasitic radiation part 2 can be transmitted along the extension direction of the parasitic radiation part 2 .

In some embodiments, as shown in FIGS. 5-8 , the length of the third rectangular pattern 21 is greater than the length of the fourth rectangular pattern 22 , and the distance between the opposite side edges of the third rectangular pattern 21 and the first rectangular pattern 123 is smaller than the length of the fourth rectangular pattern 21 . The distance between the opposite side edges of the pattern 22 and the second rectangular pattern 124 (as shown in FIG. 9 as the distance L1 is greater than the distance L4).

Referring further to FIG. 9 , when the second sheet pattern 122 transmits electromagnetic signals to the parasitic radiation part 2 , the third rectangular pattern 21 and the first rectangular pattern 123 that are close to each other cause the electromagnetic signal to preferentially pass from the third rectangular pattern 21 to the parasitic radiation part 2 . The open end passes 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 . This ensures that the parasitic radiation part 2 can generate an induced electric field that can be superimposed on the electromagnetic signal of the main radiation part 1 .

In some embodiments, as shown in FIGS. 5-8 , the parasitic radiation part 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 with the sides away from the main radiation part 1 . The third rectangular pattern 21 and the fifth rectangular pattern 25 correspond to the first rectangular pattern 123 in the length direction of the third rectangular pattern 21 . In the width direction of the third rectangular pattern 21, the open end of the third rectangular pattern 21 at least partially corresponds to the open end of the second rectangular pattern 124.

Area I in FIG. 8 shows a specific form. 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 . Referring further to FIG. 9 , the second sheet pattern 122 is arranged around a part of the open end of the third rectangular pattern 21 , which can increase the coupling effect between the main radiation part 1 and the parasitic radiation part 2 so that the induced current flows along the third rectangular pattern 21 . The length direction of the rectangular pattern 21 is conductive.

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

In some embodiments, as shown in FIGS. 5-8 , the distances from opposite side edges of the third to fourth rectangular patterns 21 to 22 , the second rectangular pattern 124 and the first rectangular pattern 123 are the same.

Referring further to FIG. 9 , the current intensity on the third rectangular pattern 21 in the figure is relatively high, especially at the edge positions on opposite sides of the third rectangular pattern 21 and the fourth rectangular pattern 22 . Therefore, the parasitic radiation part 2 can conduct the electromagnetic signal on the main radiation part 1 to the fourth rectangular pattern 22 through the third rectangular pattern 21, so that the parasitic radiation part 2 can generate an induced magnetic field.

In an optional implementation, the antenna assembly in the above embodiment can be applied to an electronic device. As shown in FIGS. 1-8 , the electronic device in this embodiment includes a circuit board 7 and an antenna unit 4 . The circuit board 7 includes first contacts and second contacts. 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 radiation part 1, a ground part 3 and a parasitic radiation part 2. The main radiation part 1 includes a middle pattern 12, a first branch 11 and a feed point 13 provided on the middle pattern 12. The ground part 3 includes a ground point. 31. The feed point 13 is electrically connected to the first contact through the first electrical connector 81, and the ground point 31 is electrically connected to the second contact through the second electrical connector 82. That is, the first contact point is used for the circuit board 7 to feed electromagnetic signals to the antenna unit 4 , and the second contact point is used for grounding the antenna unit 4 . The ground part 3 , the main radiation part 1 and the parasitic radiation part 2 are arranged in sequence, and the main radiation part 1 is coupled to the ground part 3 and the parasitic radiation part 2 . In the arrangement direction of the ground part 3, the main radiation part 1 and the parasitic radiation part 2, the parasitic radiation part 2 coincides with the projection of at least part of the intermediate pattern 12, and the ground part 3 overlaps with at least part of the intermediate pattern 12 and at least part of the first branch 11 The projections coincide.

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 through surface treatment processes such as laser engraving. Two via holes are opened on the plastic board, 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 .

In the electronic device of this embodiment, the main radiation part 1, the parasitic radiation part 2 and the ground part 3 are arranged together on the same surface of the substrate 5, and the main radiation part 1 is spaced between the ground part 3 and the parasitic radiation part 2. between. Therefore, the parasitic radiation part 2 is configured to correspond to the middle pattern 12, and the ground part 3 is configured to correspond to both the first branches 11 and the middle pattern 12, so that the parasitic radiation part 2 cooperates with the ground part 3 to broaden the operating frequency band of the antenna assembly. . On the other hand, the parasitic radiation part 2 receives the electromagnetic induction from the main radiation part 1 and generates an induced current. This induced current allows the electromagnetic signal radiated by the parasitic radiation part 2 to be superposed with the electromagnetic signal radiated by the main radiation part 1, thereby greatly increasing the radiation efficiency of the antenna assembly.

FIG. 10 is a schematic structural diagram of the antenna unit 4 and the first shielding plate 61 and the second shielding plate 62 in this embodiment. 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.

In some implementations, as shown in FIGS. 1-10 , the electronic device in this embodiment further includes a first shielding plate 61 and a second shielding plate 62 . The circuit board 7 is arranged between the first shielding plate 61 and the second shielding plate 62 , the substrate 5 is arranged 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 substrate 5 away from the first shielding plate. 61 on one side. The ground part 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. The third branch 33 One end 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 part 2 includes a third rectangular pattern 21 and a fourth rectangular pattern 22 with adjacent sides having unequal lengths. The third rectangular pattern 21 and the fourth rectangular pattern 22 extend in parallel, and the third rectangular pattern 21 and the fourth rectangular pattern 22 are far apart. The end of the main radiation part 1 is electrically connected and corresponds to the middle pattern 12 . In the thickness direction of the first shielding plate 61, the second branches 32, the third branches 33, part of the first branches 11, part of the third rectangular pattern 21 and part of the middle pattern 12 are staggered from the first shielding plate 61, causing parasitic radiation. Part 2, the third branch 33 and the first branch 11 correspond to the second shielding plate 62.

Specifically, in the thickness direction of the first shielding plate 61 , the ground portion 3 , part of the first branches 11 , part of the third rectangular pattern 21 , part of the first rectangular pattern 123 and part of the first sheet pattern 121 are in contact with the first shield. The edges of plate 61 are staggered. One long side of the first sheet pattern 121 partially overlaps the side of the first shielding plate 61 .

The first shielding plate 61 in this embodiment corresponds to part of the antenna unit 4, which can prevent the antenna unit 4 from causing interference to the internal components of the electronic device, and at the same time ensure 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 causing interference to the display screen 93 .

FIG. 11 is a schematic diagram of the return loss simulation of the antenna unit 4 in 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 when the antenna unit 4 of this embodiment is in the 3.5GHz-4GHz frequency band, curve I will produce a sagging area. Therefore, the parasitic radiation part 2 broadens the operating frequency band of the antenna assembly and increases the radiation efficiency.

Figure 12 is a schematic diagram of the total efficiency simulation of the antenna unit 4 in this embodiment. Curve III in the figure is the simulation result of the radiation efficiency of the antenna unit 4 in 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 in the 3.5GHz-4GHz frequency band of the antenna unit 4 of this embodiment, the radiation efficiency of curve III is significantly enhanced compared to curve IV.

Figure 13 is a Smith simulation schematic diagram of the antenna unit 4 of this embodiment. The 3.7GHz point in the figure is concentrated in the center of the Smith chart. It can be seen that the antenna unit 4 has a good impedance matching design.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (16)

1. An antenna assembly, characterized in that the antenna assembly includes: base plate (5); and The antenna unit (4) is arranged on one side of the substrate (5) and includes a main radiation part (1), a ground part (3) and a parasitic radiation part (2). The main radiation part (1) includes an intermediate pattern (12), the first branch (11) and the feed point (13) provided in the middle pattern (12), the ground part (3) includes a ground point (31); The ground part (3), the main radiation part (1) and the parasitic radiation part (2) are arranged in sequence and separated by gaps. The main radiation part (1) and the ground part (3) Coupled with the parasitic radiation part (2); Wherein, in the arrangement direction of the ground part (3), the main radiation part (1) and the parasitic radiation part (2), the intermediate pattern (12) and the parasitic radiation part (2) and The projection of the ground portion (3) at least partially coincides with the projection of the first branch (11) and the ground portion (3) and is offset from the parasitic radiation portion (2). 2. The antenna assembly according to claim 1, characterized in that one end of the first branch (11) is connected to the middle pattern (12); The grounding part (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) The first branch (11) is 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 is connected to the end of the second branch (32). One end of the first branch (11) away from the middle pattern (12) extends in parallel. 3. The antenna assembly according to claim 2, wherein the intermediate pattern (12) includes a first sheet pattern (121), and one end of the first sheet pattern (121) is connected to the first sheet pattern (121). The end of the branch (11) is connected, and the other end extends parallel to the end of the second branch (32) away from the third branch (33). 4. The antenna assembly according to claim 3, characterized in that the first sheet pattern (121) is a rectangular sheet with adjacent sides having unequal lengths, and the length of the first sheet pattern (121) is the same as the length of the first sheet pattern (121). The lengths of the second branches (32) are consistent, and 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 smaller than the length of the first branch (11). 5. The antenna assembly according to claim 4, characterized in that 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), the second transverse edge (331) is located at the open end of the third branch (33), and the third transverse edge (331) is located at the open end of the third branch (33). A transverse edge (111), the second transverse edge (331) and the short side of the first sheet pattern (121) are parallel to each other. 6. The antenna assembly according to claim 3, characterized in that the width of the first sheet pattern (121) is consistent with the width of the second branch (32), The width of the third branch (33) is consistent with the width of the first branch (11). 7. The antenna assembly according to any one of claims 1-6, characterized in that the intermediate pattern (12) includes: A first sheet-like pattern (121). The first sheet-like pattern (121) is a rectangular sheet with adjacent sides of unequal lengths. One end of the first branch (11) is in contact with the first sheet-like pattern (121). The short side of 121) is connected, and the other end extends in a direction away from the parasitic radiation part (2); and A second sheet-like pattern (122). One end of the second sheet-like pattern (122) is connected to the long side of the first sheet-like pattern (121), and the other end extends toward the parasitic radiation part (2). 8. The antenna assembly according to claim 7, wherein the first branch (11) is opposite to the long side of the first sheet pattern (121) and the second sheet pattern (122). The long side is set at a bevel. 9. The antenna assembly according to claim 7, wherein the second sheet pattern (122) includes a first longitudinal edge (1221) and a second longitudinal edge (1222) in an extending direction, and the second longitudinal edge (1222) is The short side of the sheet-like pattern (121) connected to the first branch (11) is aligned with the first longitudinal edge (1221), and the other short side is far away from the second longitudinal edge (1222). Describe the first branch (11). 10. The antenna assembly according to claim 9, wherein the extension direction of the parasitic radiation part (2) is consistent with the extension direction of the second sheet pattern (122); The parasitic radiation part (2) includes a third longitudinal edge (23) and a fourth longitudinal edge (24) in the extending direction, and the third longitudinal edge (23) is aligned with the first longitudinal edge (1221), The fourth longitudinal edge (24) is aligned with the second longitudinal edge (1222). 11. The antenna assembly according to claim 7, wherein the second sheet pattern (122) includes a first rectangular pattern (123) and a second rectangular pattern (124), and the first rectangular pattern (124) 123) and the second rectangular pattern (124) extend in parallel from the long side of the first sheet pattern (121) to the parasitic radiation part (2), and the length of the first rectangular pattern (123) Less than and the length of the second rectangular pattern (124); The parasitic radiation part (2) includes a third rectangular pattern (21) and a fourth rectangular pattern (22) with adjacent sides having unequal lengths. The third rectangular pattern (21) and the fourth rectangular pattern (22) Extend in parallel, and the third rectangular pattern (21) and the fourth rectangular pattern (22) are electrically connected to the ends far away from the main radiation part (1), the third rectangular pattern (21) and the The first rectangular pattern (123) corresponds to the fourth rectangular pattern (22) and the second rectangular pattern (124). 12. The antenna assembly according to claim 11, wherein the length of the third rectangular pattern (21) is greater than the length of the fourth rectangular pattern (22), and the third rectangular pattern (21) The distance between the opposite side edges of the first rectangular pattern (123) is smaller than the distance between the opposite side edges of the fourth rectangular pattern (22) and the second rectangular pattern (124). 13. The antenna assembly according to claim 11, characterized in that the parasitic radiation part (2) further includes a fifth rectangular pattern (25), the fifth rectangular pattern (25) is connected to the third rectangular pattern Between the pattern (21) and the fourth rectangular pattern (22), the fifth rectangular pattern (25), the fourth rectangular pattern (22) and the third rectangular pattern (21) are away from the main Align the sides of the radiating part (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 three rectangular patterns (21), the open end of the third rectangular pattern (21) at least partially corresponds to the open end of the second rectangular pattern (124). 14. The antenna assembly according to claim 13, wherein the third to fourth rectangular patterns (21) to (22), the second rectangular pattern (124) and the first The distance between opposite side edges of the rectangular pattern (123) is the same. 15. An electronic device, characterized in that the electronic device includes: a circuit board (7) including a first contact and a second contact; and An 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 radiation part (1), a ground part (3) and a parasitic radiation part (2). The main radiation part (1) includes a middle pattern (12), a first branch (11) and a parasitic radiation part disposed in the middle. The feed point (13) of the pattern (12), the ground portion (3) includes a ground point (31), the feed point (13) is connected to the first electrical connector (81) through the first electrical connector (81). The contacts are electrically connected, and the ground point (31) is electrically connected to the second contact through the second electrical connector (82); The ground part (3), the main radiation part (1) and the parasitic radiation part (2) are arranged in sequence, and the main radiation part (1), the ground part (3) and the parasitic radiation Part (2) coupling; In the arrangement direction of the ground part (3), the main radiation part (1) and the parasitic radiation part (2), the parasitic radiation part (2) and at least part of the intermediate pattern (12) The projections overlap, and the ground portion (3) coincides with the projections of at least part of the intermediate pattern (12) and at least part of the first branches (11). 16. The electronic device according to claim 15, characterized in that the electronic device further includes a first shielding plate (61) and a second shielding plate (62); The circuit board is disposed between the first shielding plate (61) and the second shielding plate (62), and the substrate is disposed away from the first shielding plate (61) and away from the second shielding plate (61). 62), and the antenna unit is located on the side of the substrate away from the first shielding plate (61); The grounding part (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) The first branch (11) is 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 is connected to the end of the second branch (32). One end of the first branch (11) away from the middle pattern (12) extends in parallel; The parasitic radiation part (2) includes a third rectangular pattern (21) and a fourth rectangular pattern (22) with adjacent sides having unequal lengths. 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 part (1) are electrically connected and correspond to the intermediate 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 branch The rectangular pattern (21) and part of the intermediate pattern (12) are staggered with the first shielding plate (61), the parasitic radiation part (2), the third branch (33) and the first branch The section (11) corresponds to the second shielding plate (62).