CN121055005A

CN121055005A - Antenna assembly and electronic equipment

Info

Publication number: CN121055005A
Application number: CN202410680132.7A
Authority: CN
Inventors: 杨江燕
Original assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Current assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Priority date: 2024-05-28
Filing date: 2024-05-28
Publication date: 2025-12-02

Abstract

This application provides an antenna assembly and an electronic device. The antenna assembly includes a feed source and a radiator. The feed source is used to generate a first excitation signal. The radiator includes a first radiating part, a second radiating part, and a third radiating part. The first radiating part has a first connecting end and a grounding end, the grounding end is used for grounding, and the first radiating part has a first electrical length. The second radiating part has a feed end and a first free end, a first gap is formed between the feed end and the grounding end, and the feed end and the grounding end are electrically connected. The first free end is further away from the grounding end than the feed end. The second radiating part has a second electrical length, which is smaller than the first electrical length. The third radiating part includes a second connecting end and a second free end, the second connecting end being connected to the first connecting end. The feed end is used to receive the first excitation signal. The first radiating part and the third radiating part are used together to generate a half-wavelength mode under the excitation of the first excitation signal to support a first target frequency band.

Description

Antenna assembly and electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to an antenna assembly and an electronic device.

Background

With the development of technology, electronic devices such as mobile phones with communication functions have become more and more popular and more powerful. An antenna assembly is typically included in an electronic device to enable communication functions of the electronic device. However, the antenna assembly in the electronic device in the related art is liable to have an SAR value exceeding the standard at the time of communication.

Disclosure of Invention

In a first aspect, an embodiment of the present application provides an antenna assembly, where the antenna assembly includes a feed source and a radiator, the feed source is used to generate a first excitation signal, and the radiator includes:

a first radiation part having a first connection end and a grounding end for grounding, the first radiation part having a first electrical length, and

A second radiation part having a feeding end and a first free end, a first gap between the feeding end and the grounding end, the feeding end and the grounding end being electrically connected, the first free end deviating from the grounding end compared with the feeding end, the second radiation part having a second electrical length smaller than the first electrical length, and

The third radiation part comprises a second connecting end and a second free end, and the second connecting end is connected with the first connecting end;

the feed end is used for receiving the first excitation signal, and the first radiation part and the third radiation part are jointly used for generating a half-wavelength mode under the excitation of the first excitation signal so as to support a first target frequency band.

In a second aspect, an embodiment of the present application provides an electronic device, including an antenna assembly according to the first aspect, where a radiator is located on top of the electronic device.

In summary, in the antenna assembly according to the embodiment of the present application, the structural form of the radiator is designed to design the connection relationship among the first radiating portion, the second radiating portion, and the third radiating portion of the radiator, and the grounding end of the first radiating portion and the feeding end of the second radiating portion have a first gap therebetween, so that the first radiating portion and the third radiating portion are used together to generate a half wavelength mode under the excitation of the first excitation signal so as to support the first target frequency band. The first radiating part has a first electric length, and the second radiating part has a second electric length, and the second electric length is smaller than the first electric length, so that the antenna component provided by the embodiment of the application can utilize the first radiating part with longer electric length and cooperate with the third radiating part to support the first target frequency band together, so that resonance current is dispersed when the radiator supports the first target frequency band, the maximum current of the resonance current when the radiator supports the first target frequency band is reduced, and SAR value when the antenna component supports the first target frequency band is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a radiator in a wire assembly provided in the related art;

Fig. 2 is a schematic diagram of another view of the radiator of the antenna assembly shown in fig. 1;

FIG. 3 is a schematic diagram illustrating a current distribution of the radiator shown in FIG. 1 supporting a first target frequency band;

FIG. 4 is a schematic diagram illustrating a current distribution of the radiator shown in FIG. 1 supporting a second target frequency band;

fig. 5 is a schematic diagram of an antenna assembly according to an embodiment of the present application;

fig. 6 is a schematic structural view of a radiator in the antenna assembly provided in fig. 5;

Fig. 7 is a schematic diagram of an antenna assembly according to another embodiment of the present application;

fig. 8 is a schematic structural view of a radiator in the antenna assembly provided in fig. 7;

FIG. 9 is a detailed identification schematic of the radiator of FIG. 8;

FIG. 10 is a schematic diagram illustrating a distribution of excitation current when the radiator of FIG. 8 supports a first target frequency band;

FIG. 11 is a schematic diagram illustrating a distribution of excitation current when the radiator of FIG. 8 supports a second target frequency band;

fig. 12 is a schematic diagram of an antenna assembly according to another embodiment of the present application;

fig. 13 is a detailed schematic diagram of the antenna assembly shown in fig. 12;

Fig. 14 is a schematic circuit diagram of the antenna assembly shown in fig. 13 according to an embodiment;

fig. 15 is a schematic view of an antenna assembly according to another embodiment of the present application;

Fig. 16 is a schematic view of an antenna assembly according to still another embodiment of the present application;

fig. 17 is a schematic diagram of S parameters of an antenna assembly and an antenna assembly according to an embodiment of the present application;

fig. 18 is a diagram showing comparison of parameters such as SAR values when the antenna assembly according to an embodiment of the present application supports various frequency bands with the antenna assembly according to the related art;

Fig. 19 is a schematic perspective view of an electronic device according to an embodiment of the present application;

fig. 20 is a schematic view of a part of the structure of the electronic apparatus shown in fig. 19.

Description of the main element reference numerals

The electronic device 1, the antenna assembly 10, the display screen 20, the shell 30 and the middle frame 40;

Feed source S0, radiator 100, first radiating portion 110, first connection end 111, ground end 112, first side 1121, second side 1122, first gap 110a, second gap 110b, and third gap 110c;

a second radiating portion 120, a feeding end 121, a first free end 122, a third side 1211, a fourth side 1212, a connection point P1;

a third radiating portion 130, a second connecting end 131, a second free end 132, a first slit 130a, a second slit 130b;

Hot spot area 100a, midpoint O1, connection 140;

A matching circuit 200, a first matching device 210, a second matching device 220;

a switching circuit 300, a switch 310, a matching branch 320;

a top edge 1a, a side edge 1b, a top end surface 1c, a first side surface 1d, and a second side surface 1e;

Front camera 510, rear camera 520, circuit board 530, battery 540, speaker 550, USB port 560, and earphone jack 570.

Detailed Description

The technical scheme of the present application will be clearly and completely described below with reference to the accompanying drawings. It should be apparent that the described embodiments of the application are only some embodiments, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the embodiments provided by the present application are within the scope of protection of the present application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will appreciate explicitly and implicitly that the described embodiments of the application may be combined with other embodiments.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, an assembly or device incorporating one or more components is not limited to the listed one or more components, but may alternatively include one or more components not listed but inherent to the illustrated product, or one or more components that may be present based on the illustrated functionality.

With the development of technology, electronic devices having a communication function are widely developed. An antenna assembly is typically included in an electronic device to transceive electromagnetic wave signals. When the antenna assembly emits an electromagnetic wave signal, energy can be radiated in the form of an electromagnetic wave signal, a phenomenon also known as electromagnetic radiation. Electromagnetic radiation refers to the phenomenon in which energy is emitted into space in the form of electromagnetic wave signals.

When electromagnetic radiation is too high, it may cause some harm to the human body. The problem of electromagnetic radiation of antenna assemblies in electronic devices has been a concern. The electromagnetic radiation size can be measured in terms of electromagnetic wave absorption ratio or specific absorption rate (SpecificAbsorption Rate, SAR). SAR is the electromagnetic power absorbed or consumed by human tissue per unit mass, and the unit is W/kg.

Different countries or regions have issued corresponding regulations for electromagnetic radiation. For example, national standard YD-T1644.1-2007 and European standard EN 62209-1, etc. In addition, more and more severe compliance forms are also presented for various countries or regions of electromagnetic radiation, so as to reduce or even avoid harm to human bodies when the antenna assembly of the electronic device receives and transmits electromagnetic wave signals.

To illustrate the advantages of the antenna assembly 10 provided by the embodiments of the present application, the antenna assembly 10 of the related art will be described first, and it should be understood that the antenna assembly 10 of the related art of the present application is a solution before the improvement of the antenna assembly 10 provided by the embodiments of the present application, and should not be construed as the antenna assembly 10 of the related art.

Referring to fig. 1 and 2, fig. 1 is a schematic perspective view of a radiator in a wire assembly provided in the related art, and fig. 2 is a schematic view of another view of the radiator of the antenna assembly shown in fig. 1. The radiator 100 of the related art antenna assembly 10 includes a first radiating portion 110, a second radiating portion 120, and a third radiating portion 130. The first radiating portion 110 has a first connection end 111 and a ground end 112. The second radiating portion 120 has a feeding end 121 and a first free end 122. The feeding end 121 is connected to the ground end 112, and the first free end 122 is opposite to the ground end 112 than the feeding end 121. The third radiating portion 130 has a second connecting end 131 and a second free end 132. The second connecting end 131 is connected to the first connecting end 111, the second free end 132 is adjacent to the first free end 122, and a gap 130t is formed between the third radiating portion 130 and the first radiating portion 110 and the second radiating portion 120, respectively.

In addition, the antenna assembly 10 further includes a feed source S0, and the feed source S0 is electrically connected to the feed end 121. In this embodiment, the antenna assembly 10 further includes a feeding member 610, and the feeding source S0 is electrically connected to the feeding terminal 121 through the feeding member 610. In addition, the antenna assembly 10 further includes a ground feed 620, and the ground 112 is grounded through the ground feed 620.

Referring to fig. 1, fig. 2 and fig. 3 together, fig. 3 is a schematic diagram of a current distribution when the radiator shown in fig. 1 supports a first target frequency band. Wherein (a) in fig. 3 is a color chart, and (b) in fig. 3 is a gray chart of (a) in fig. 3. As can be seen from fig. 3, the second radiating portion 120 supports the first target frequency band. In this embodiment, the first target frequency band includes a high frequency band as an example. The high frequency band may include a B40 band, or a B41 band. In the simulation diagram of the present embodiment, the simulation is performed taking the example that the first target frequency band includes a high frequency band and the high frequency band includes a B41 frequency band. For convenience of description, the second radiation portion 120 may also be referred to as a short arm. The quarter wavelength mode (also referred to as 1/4 wavelength mode) of the short arm supports the first target frequency band. In other words, the SAR hot spot when the radiator 100 supports the first target frequency band is mainly concentrated on the short arm. It can be seen that the SAR value is higher when the radiator 100 supports the first target frequency band.

Referring to fig. 1, fig. 2 and fig. 4 together, fig. 4 is a schematic diagram of a current distribution when the radiator shown in fig. 1 supports a second target frequency band. Wherein (a) in fig. 4 is a color chart, and (b) in fig. 4 is a gray chart of (a) in fig. 4. As can be seen in fig. 4, the first radiating portion 110 and the third radiating portion 130 support the second target frequency band together. Wherein the frequency of the second target frequency band is lower than the frequency of the first target frequency band. In this embodiment, the second target frequency band includes the intermediate frequency band is described as an example. The intermediate frequency band may include a B1 band, or a B3 band. In the simulation diagram of the present embodiment, the simulation is performed taking the example that the second target frequency band includes an intermediate frequency band and the intermediate frequency band includes a B1 frequency band. For convenience of description, the whole of the first radiating portion 110 and the third radiating portion 130 may also be referred to as a long arm. In this embodiment, the second target frequency band is supported by the one-half wavelength mode (also referred to as 1/2 wavelength mode) of the long arm. In other words, the SAR hot spot when the radiator 100 supports the second target frequency band is located in the long arm. It can be seen that the SAR value is higher when the radiator 100 supports the second target frequency band.

In summary, the SAR value of the antenna assembly 10 in the related art is high when supporting the first target frequency band. In addition, the SAR value is also high when the antenna assembly 10 in the related art supports the second target frequency band.

Next, description and simulation will be made on the antenna assembly 10 provided in the embodiment of the present application.

Referring to fig. 5 and fig. 6 together, fig. 5 is a schematic diagram of an antenna assembly according to an embodiment of the application, and fig. 6 is a schematic diagram of a radiator in the antenna assembly provided in fig. 5. The antenna assembly 10 includes a feed S0 and a radiator 100. The feed source S0 is used for generating a first excitation signal. The radiator 100 includes a first radiating portion 110, a second radiating portion 120, and a third radiating portion 130. The first radiation portion 110 has a first connection end 111 and a grounding end 112, and the grounding end 112 is used for grounding. The first radiating portion 110 has a first electrical length. The second radiating portion 120 has a feeding end 121 and a first free end 122. The feeding end 121 and the grounding end 112 have a first gap 110a therebetween, and the feeding end 121 is electrically connected to the grounding end 112. The first free end 122 faces away from the ground end 112 compared to the feed end 121, and the second radiating portion 120 has a second electrical length. The second electrical length is less than the first electrical length. The third radiating portion 130 includes a second connecting end 131 and a second free end 132, and the second connecting end 131 is connected to the first connecting end 111. The feeding end 121 is configured to receive the first excitation signal, and the first radiating portion 110 and the third radiating portion 130 are together configured to generate a half-wavelength mode under excitation of the first excitation signal to support a first target frequency band.

The radiator 100 may be a Laser Direct Structuring (LDS) radiator, or a flexible circuit board 530 (Flexible Printed Circuit, FPC) radiator, or a printed direct Structuring (PRINTDIRECT STRUCTURING, PDS) radiator, or a metal stub radiator, or a bezel radiator. In the present embodiment, the radiator 100 is illustrated and described as an FPC radiator.

The ground terminal 112 is configured to be grounded. The grounding terminal 112 may be, but is not limited to, a ground board of the electronic device 1 to which the antenna assembly 10 is applied, such as by a grounding member 620 (e.g., a conductive spring, or a conductive adhesive, or a conductive screw, etc.). The floor of the electronic device 1 may be, but is not limited to, a ground constituted by a middle frame, or a ground in the circuit board 530, or a ground of a shield of a display screen of the electronic device 1, or a ground of the housing 30.

The feed terminal 121 is configured to be electrically connected to the feed source S0 to receive the first excitation signal. The feeding end 121 may be electrically connected to the feed source S0 by, but not limited to, a feeding member 610 (such as a conductive spring, or conductive adhesive, or conductive screw, etc.).

The feeding end 121 and the grounding end 112 have a first gap 110a therebetween, and the feeding end 121 is electrically connected to the grounding end 112, so that the first radiating portion 110 and the second radiating portion 120 can be considered as being connected.

The first free end 122 is located at the right end from the view point as compared to the feed end 121 facing away from the ground end 112. As can be seen from the foregoing description of the first radiating portion 110 and the second radiating portion 120, the first connection end 111, the grounding end 112, the feeding end 121 and the first free end 122 are sequentially arranged.

The first radiating portion 110 has a first electrical length, the second radiating portion 120 has a second electrical length, and the second electrical length is smaller than the first electrical length, and thus, the electrical length of the first radiating portion 110 is smaller and the electrical length of the second radiating portion 120 is larger.

The third radiating portion 130 includes a second connecting end 131 and a second free end 132, where the second connecting end 131 is connected to the first connecting end 111, and in this embodiment, the second free end 132 is disposed adjacent to the first free end 122. In this way, the radiator 100 including the first radiating portion 110, the second radiating portion 120, and the third radiating portion 130 has a compact size in the arrangement direction of the first radiating portion 110 and the second radiating portion 120. It is understood that in other embodiments, the second free end 132 may be positioned at other locations, for example, the second free end 132 may be positioned away from the first free end 122 as compared to the second connecting end 131.

When the first radiating portion 110 and the third radiating portion 130 support the first target frequency band under the excitation of the first excitation signal, the excitation current corresponding to the first excitation signal is distributed between the first radiating portion 110 and the third radiating portion 130.

In this embodiment, the first radiating portion 110 and the third radiating portion 130 are used together to generate a half-wavelength mode to support a first target frequency band under the excitation of the first excitation signal, which means that the first radiating portion 110 and the third radiating portion 130 support the first target frequency band together, and the half-wavelength mode (also referred to as a 1/2-wavelength mode) of the first radiating portion 110 and the third radiating portion 130 support the first target frequency band.

The "wavelength" in the "half wavelength mode" in the first target frequency band "is referred to as a wavelength corresponding to a center frequency point of the first target frequency band by referring to" the half wavelength mode (also referred to as a 1/2 wavelength mode) of the first radiation portion 110 and the third radiation portion 130 "herein.

The first target frequency Band may be, but is not limited to, a High frequency Band (HB), or a wireless fidelity technology (WIRELESS FIDELITY, WIFI) 5G frequency Band, or an Ultra-High Band (UHB). In one embodiment, the first target frequency band includes a high frequency band. The high frequency band may include, but is not limited to, a B40 band or a B41 band.

As is apparent from the foregoing description of the antenna assembly 10 in the related art, the second radiating portion 120 supports the first target frequency band, and in the antenna assembly 10 provided in the embodiment of the present application, the first radiating portion 110 and the second radiating portion 120 together support the first target frequency band, while the antenna assembly 10 provided in the embodiment of the present application, the first radiating portion 110 has a first electrical length, the second radiating portion 120 has a second electrical length, the second electrical length is smaller than the first electrical length, and the first radiating portion 110 and the third radiating portion 130 together support the first target frequency band. Therefore, the sum of the electrical lengths of the first radiating portion 110 and the third radiating portion 130 in the radiator 100 in the antenna assembly 10 provided in the embodiment of the present application is necessarily greater than the electrical length of the second radiating portion 120. Accordingly, the first target frequency band is supported by the second shorter radiating portion 120 in the related art, and the antenna assembly 10 provided by the embodiment of the application uses the first radiating portion 110 and the third radiating portion 130 together to support the first target frequency band. That is, in the antenna assembly 10 provided in the embodiment of the present application, a longer radiation portion is used when the first target frequency band is supported, so that the resonant current generated when the antenna assembly 10 provided in the embodiment of the present application supports the first target frequency band is more dispersed, thereby reducing the maximum current of the resonant current corresponding to the first target frequency band, and further reducing the SAR value when the antenna assembly 10 supports the first target frequency band.

Specifically, the magnitude of the SAR value has an evaluation formula, specificallyWherein E represents the effective value of an electric field in the tissue and is related to the magnitude of a resonance current, sigma represents the electrical conductivity of the body tissue, and ρ represents the density of the body tissue. Accordingly, when the radiator 100 supports the resonance current dispersion of the first target frequency band and the maximum value of the resonance current is reduced, the SAR value of the antenna assembly 10 supporting the first target frequency band is reduced.

In summary, in the antenna assembly 10 according to the embodiment of the application, the structural configuration of the radiator 100 is designed to design the connection relationship among the first radiating portion 110, the second radiating portion 120 and the third radiating portion 130 of the radiator 100, and the first gap 110a is formed between the ground end 112 of the first radiating portion 110 and the feeding end 121 of the second radiating portion 120, so that the first radiating portion 110 and the third radiating portion 130 are used together to generate a half wavelength mode under the excitation of the first excitation signal to support the first target frequency band. The first radiating portion 110 has a first electrical length, and the second radiating portion 120 has a second electrical length, which is smaller than the first electrical length, so that the antenna assembly 10 provided in the embodiment of the application can utilize the first radiating portion 110 with a longer electrical length and cooperate with the third radiating portion 130 to support the first target frequency band together, so that the resonant current when the radiator 100 supports the first target frequency band is more dispersed, thereby reducing the maximum current of the resonant current when the radiator 100 supports the first target frequency band, and further reducing the SAR value when the antenna assembly 10 supports the first target frequency band.

Further, the second radiating portion 120 is configured to generate a quarter wavelength mode under excitation of the first excitation signal to support the first target frequency band.

When the first radiation portion 110 and the third radiation portion 130 support the first target frequency band under the excitation of the first excitation signal, the excitation current corresponding to the first excitation signal is distributed between the first radiation portion 110 and the third radiation portion 130. In addition, the second radiating portion 120 is further configured to support the first target frequency band, so that an excitation current corresponding to the first excitation signal is further distributed in the third radiating portion 130. In other words, the excitation current corresponding to the first excitation signal is distributed among the first radiating portion 110, the second radiating portion 120, and the third radiating portion 130.

The "wavelength" in the "quarter wavelength mode" mentioned herein refers to a wavelength corresponding to a center frequency point of the first target frequency band.

In this embodiment, the second radiating portion 120 is also configured to generate a quarter wavelength mode under excitation of the first excitation signal to support the first target frequency band, so in this embodiment, energy of the first excitation signal is dispersed not only to the second radiating portion 120 and the third radiating portion 130, but also to the second radiating portion 120, so that an excitation current corresponding to the first excitation signal when the radiator 100 supports the first target frequency band is further dispersed, and a SAR value when the antenna assembly 10 supports the first target frequency band is further reduced.

Referring to fig. 7, fig. 8 and fig. 9 together, fig. 7 is a schematic diagram of an antenna assembly according to another embodiment of the application, fig. 8 is a schematic diagram of a radiator in the antenna assembly provided in fig. 7, and fig. 9 is a detailed identification schematic diagram of the radiator in fig. 8. The grounding end 112 has a first edge 1121 and a second edge 1122 connected in a bent manner. The feed end 121 has a third side 1211. The third side 1211 is opposite to the first side 1121 and spaced apart to form the first gap 110a. The radiator 100 further has a connection portion 140, where an end of the connection portion 140 is connected to an end of the second side 1122 facing away from the first side 1121, so that a second gap 110b is formed between the connection portion 140 and the second side 1122 of the ground terminal 112, where the second gap 110b communicates with the first gap 110a.

In this embodiment, the first side 1121 faces the side of the feeding end 121, the second side 1122 is bent and connected to the first side 1121, and the second side 1122 is the top side 1a of the grounding end 112 in the view shown in the drawing. One end of the connection portion 140 is connected to an end of the second side 1122 facing away from the first side 1121, and thus, the other end of the connection portion 140 is also connected to the feeding end 121. Since one end of the connection portion 140 is connected to the end of the second side 1122 facing away from the first side 1121, the second gap 110b communicating with the first gap 110a is formed between the connection portion 140 and the second side 1122 of the ground terminal 112.

As can be seen from the foregoing description, in the antenna assembly 10 provided by the embodiment of the present application, since the first gap 110a exists between the ground end 112 of the first radiating portion 110 and the feeding end 121 of the second radiating portion 120 of the radiator 100, compared with the antenna assembly 10 of the prior art, the radiating portion supporting the first target frequency band in the radiator 100 can be changed, so that the radiating portion uses the first radiating portion 110 and the third radiating portion 130 with longer dimensions to jointly generate the supporting half-wavelength mode under the excitation of the first excitation signal to support the first target frequency band. Further, in the embodiment of the present application, since the second gap 110b is formed between the connection portion 140 and the second side 1122 of the ground terminal 112, the first excitation signal can better generate the half wavelength mode of the first target frequency band on the first radiating portion 110 and the second radiating portion 120, so that the first radiating portion 110 and the third radiating portion 130 can better support the first target frequency band.

Referring to fig. 9, the feeding end 121 further has a fourth side 1212, and the fourth side 1212 is bent and connected to the third side 1211. The other end of the connection portion 140 is connected to an end of the fourth side 1212 facing away from the third side 1211, so that a third gap 110c is formed between the connection portion 140 and the feeding end 121, wherein the third gap 110c communicates with the first gap 110a, and the third gap 110c communicates with the second gap 110b.

In this embodiment, the third side 1211 is a side of the feeding terminal 121 facing the ground terminal 112, the fourth side 1212 is bent and connected to the third side 1211, and the fourth side 1212 is a top side 1a of the feeding terminal 121 in the view shown in the drawing. The other end of the connection portion 140 is connected to an end of the fourth side 1212 facing away from the third side 1211, and thus a third gap 110c is formed between the connection portion 140 and the feeding terminal 121. The third gap 110c communicates with the first gap 110a, and the third gap 110c communicates with the second gap 110b. It can be seen that the first gap 110a, the second gap 110b, and the third gap 110c are formed as a whole like a letter "T", and thus, the first gap 110a, the second gap 110b, and the third gap 110c are formed as a whole as a T-shaped gap.

As can be seen from the foregoing description, in the antenna assembly 10 provided by the embodiment of the present application, since the first gap 110a exists between the ground end 112 of the first radiating portion 110 and the feeding end 121 of the second radiating portion 120 of the radiator 100, compared with the antenna assembly 10 of the prior art, the radiating portion supporting the first target frequency band in the radiator 100 can be changed, so that the radiating portion uses the first radiating portion 110 and the third radiating portion 130 with longer dimensions to jointly generate the supporting half-wavelength mode under the excitation of the first excitation signal to support the first target frequency band. Further, in the embodiment of the present application, since the second gap 110b is formed between the connection portion 140 and the second side 1122 of the ground terminal 112, the first excitation signal can generate a half wavelength mode supporting the first target frequency band on the first radiating portion 110 and the second radiating portion 120, so that the first radiating portion 110 and the third radiating portion 130 can better support the first target frequency band. Further, the third gap 110c is formed between the connection portion 140 and the fourth side 1212 of the feeding end 121, so that the first excitation signal can further generate a half wavelength mode supporting the first target frequency band on the first radiating portion 110 and the second radiating portion 120, so that the first radiating portion 110 and the third radiating portion 130 can better support the first target frequency band.

Next, current simulation is performed when the antenna assembly according to an embodiment of the present application supports the first target frequency band and the second target frequency band. The present simulation is illustrated by way of example as being incorporated into the antenna assembly provided in the embodiment of fig. 7-9, and it will be appreciated that it may also be incorporated into the antenna assembly shown in fig. 5-6.

Referring to fig. 7 to 9 and fig. 10 together, fig. 10 is a schematic diagram illustrating a distribution of excitation current when the radiator shown in fig. 8 supports the first target frequency band. Here, (a) in fig. 10 is a color chart, and (b) in fig. 10 is a gradation chart corresponding to (a) in fig. 10. As can be seen from fig. 7 to fig. 10, when the first radiating portion 110 and the third radiating portion 130 support the first target frequency band under the excitation of the first excitation signal, the excitation current corresponding to the first excitation signal is distributed between the first radiating portion 110 and the third radiating portion 130.

Referring to fig. 7 to fig. 9 and fig. 11 together, fig. 11 is a schematic diagram illustrating a distribution of excitation current when the radiator shown in fig. 8 supports the second target frequency band. Here, (a) in fig. 11 is a color chart, and (b) in fig. 11 is a gradation chart corresponding to (a) in fig. 11. As can be seen from fig. 7 to 9, and fig. 11, the feed S0 is also used to generate a second excitation signal. The feeding terminal 121 is further configured to receive the second excitation signal. The second radiating portion 120, the first radiating portion 110, and the third radiating portion 130 are configured to generate a half-wavelength mode under excitation of the second excitation signal, so as to support a second target frequency band, where a frequency of the second target frequency band is smaller than a frequency of the first target frequency band.

In the present embodiment, the second radiating portion 120, the first radiating portion 110, and the third radiating portion 130 are also referred to as the entire arm of the radiator 100. The second radiating portion 120, the first radiating portion 110 and the third radiating portion 130 are integrally used for generating a half-wavelength mode under the excitation of the second excitation signal to support the second target frequency band, in other words, the whole arm of the radiator 100 generates a half-wavelength mode under the excitation of the second excitation signal to support the second target frequency band.

It should be noted that, the "the second radiating portion 120, the first radiating portion 110, and the third radiating portion 130" mentioned herein are used to generate a half wavelength mode under the excitation of the second excitation signal, so as to support the "wavelength" in the "half wavelength mode" in the second target frequency band "and refer to the wavelength corresponding to the center frequency point of the second target frequency band.

The second target frequency band has a frequency that is less than the frequency of the first target frequency band, for example, the first target frequency band is a high frequency band (HB), and the second target frequency band is an intermediate frequency band (MB). When the second target frequency band is an intermediate frequency band, the intermediate frequency band may include a B1 frequency band or a B3 frequency band.

The second excitation signal excites the radiator 100 to produce a periodic current. As can be seen from fig. 11, in the current half-wavelength period, the current on the radiator 100 flows from the ground terminal 112 to the first connection terminal 111 in the first radiating portion 110, from the feed terminal 121 to the first free terminal 122 in the second radiating portion 120, and from the second free terminal 132 to the second connection terminal 131 in the third radiating portion 130.

It will be appreciated that in the next half-wavelength period, the currents on the first 110, second 120, and third 130 radiating portions of the radiator 100 are reversed. Specifically, in the next half-wavelength period, the current on the radiator 100 flows from the first connection terminal 111 to the ground terminal 112 in the first radiating portion 110, from the first free terminal 122 to the feed terminal 121 in the second radiating portion 120, and from the second connection terminal 131 to the second free terminal 132 in the third radiating portion 130.

In this embodiment, the feed source S0 is further configured to generate a second excitation signal, the feed end 121 receives the second excitation signal, and the second radiating portion 120, the first radiating portion 110, and the third radiating portion 130 are integrally configured to generate a half wavelength mode under excitation of the second excitation signal, so as to support a second target frequency band, so that the antenna assembly 10 can support both the first target frequency band and the second target frequency band, and therefore, the antenna assembly 10 can support more frequency bands, and meet the communication requirements of the antenna assembly 10 in the first target frequency band and the second target frequency band.

As can be seen from the foregoing description of the antenna assembly 10 in the related art, the first radiating portion 110 and the third radiating portion 130 (the first radiating portion 110 and the third radiating portion 130 may also be referred to as long arms of the radiator 100) in the related art jointly support the second target frequency band. In the antenna assembly 10 according to the embodiment of the present application, the first radiating portion 110, the second radiating portion 120, and the third radiating portion 130 of the radiator 100 support the second target frequency band together, that is, the whole arm of the radiator 100 supports the second target frequency band. That is, when the antenna assembly 10 provided in the embodiment of the present application supports the second target frequency band, a longer radiation portion is utilized, so that the resonant current generated when the antenna assembly 10 provided in the embodiment of the present application supports the second target frequency band is more dispersed, thereby reducing the maximum current of the resonant current corresponding to the second target frequency band, and reducing the SAR value when the antenna assembly 10 supports the first target frequency band.

Referring to fig. 7 to 9 again, in the present embodiment, the second free end 132 is adjacent to the first free end 122, and a first gap 130a is formed between the third radiating portion 130 and the first radiating portion 110, a second gap 130b is formed between the third radiating portion 130 and the second radiating portion 120, and the second gap 130b is in communication with the first gap 130 a.

In this embodiment, the second free end 132 is adjacent to the first free end 122, so that the dimension of the radiator 100 in the direction in which the first radiating portion 110 and the second radiating portion 120 are arranged is relatively small, so that the radiator 100 is relatively compact and can be well applied to the electronic device 1 to which the antenna assembly 10 is applied.

It will be appreciated that in other embodiments, the second free end 132 is opposite the first free end 122 compared to the second connection end 131, so long as the antenna assembly 10 is capable of supporting both the first and second target frequency bands described above.

Referring to fig. 4 and 11 together, when the radiator 100 supports the second target frequency band, the radiator 100 has a hot spot area 100a, and the whole of the second radiating portion 120, the first radiating portion 110 and the third radiating portion 130 has a middle point O1, where the middle point O1 is located in the hot spot area 100a.

Referring to fig. 4, as can be seen from the foregoing description of the antenna assembly 10 in the related art, the first radiating portion 110 and the third radiating portion 130 (the first radiating portion 110 and the third radiating portion 130 may also be referred to as long arms of the radiator 100) in the related art jointly support the second target frequency band. As can be seen from fig. 4, the hot spot of the related art antenna assembly 10 supporting the second target frequency band is located at the geometric centers of the feeding end 121, the first radiating portion 110 and the third radiating portion 130.

Referring to fig. 10, in the antenna assembly 10 provided by the embodiment of the present application, the first radiating portion 110, the second radiating portion 120 and the third radiating portion 130 of the radiator 100 support the second target frequency band together, that is, the whole arm of the radiator 100 supports the second target frequency band. As can be seen from fig. 10, the hot spot of the antenna assembly 10 according to the embodiment of the application when supporting the second target frequency band is located at the center of the second radiating portion 120, the first radiating portion 110, and the third radiating portion 130 (i.e., the whole arm). In other words, the hot spot area 100a when the radiator 100 supports the second target frequency band includes an area where the midpoint O1 of the whole arm is located.

Therefore, compared to the prior art, the hot spot of the radiator 100 of the antenna assembly 10 provided by the embodiment of the present application moves toward the center of the whole arm. Compared to the prior art, the hot spot of the radiator 100 of the antenna assembly 10 provided by the embodiment of the application is shifted to the right side (i.e. the side of the first connection end 111 in the view of the drawing) by 1mm to 10mm, optionally 3.5mm.

As can be seen, in the antenna assembly 10 provided in the embodiment of the application, the whole arm (i.e., the first radiating portion 110, the second radiating portion 120 and the third radiating portion 130) of the radiator 100 is used to support the second target frequency band, and the current when supporting the second target frequency band is dispersed to the whole arm. The current when supporting the second target frequency band is dispersed to the whole arm, so that the position of the hot spot when the radiator 100 of the antenna assembly 10 provided in the embodiment of the present application supports the second target frequency band is changed, and the hot spot area 100a includes the midpoint O1, so that the current can be well dispersed to the whole arm of the radiator 100, and the SAR value when the antenna assembly 10 supports the second target frequency band is further reduced.

Further, the first target frequency band includes a high frequency band, and the second target frequency band includes an intermediate frequency band. The dimension L of the electrical length of the second radiation portion 120 is L1. Ltoreq.L≤L2, wherein L1 is an electrical length corresponding to a quarter wavelength mode of 2.5GHz, and L2 is an electrical length corresponding to a quarter wavelength mode of 2.4 GHz.

The dimension L of the electrical length of the second radiation portion 120 is L1L 2, where L1 is an electrical length corresponding to a quarter wavelength mode of 2.5GHz, and L2 is an electrical length corresponding to a quarter wavelength mode of 2.4GHz, so that the second radiation portion 120 has a longer length, and the second radiation portion 120, the first radiation portion 110, and the third radiation portion 130 can be better excited to generate a half wavelength mode under the excitation of the second excitation signal, so as to support the second target frequency band.

In general, in the antenna assembly 10 provided in the related art, when the first target frequency band includes a high frequency band and the second target frequency band includes an intermediate frequency band, the dimension L ' of the electrical length of the second radiating portion 120 satisfies L1' L2', where L1' is an electrical length corresponding to a quarter wavelength mode of 2.7GHz and L2' is an electrical length corresponding to a quarter wavelength mode of 2.5 GHz.

When the second radiating part 120 supports two frequencies using the same wavelength pattern, the larger the frequency supported by the second radiating part 120, the smaller the electrical length of the second radiator 100. For example, when the second radiating part 120 supports 2.7GHz using the quarter wavelength mode, the electrical length is L1', and when the second radiating part 120 supports 2.5GHz using the quarter wavelength mode, the electrical length is L2', then L1'< L2'.

It can be seen that, in the antenna assembly 10 provided by the embodiment of the application, the dimension L of the electrical length of the second radiation portion 120 satisfies that L1 is equal to or less than L2, where L1 is an electrical length corresponding to a quarter wavelength mode of 2.5GHz, and L2 is an electrical length corresponding to a quarter wavelength mode of 2.4GHz, and then the electrical length of the second radiation portion 120 is greater than the length of the second radiation portion 120 in the related art. In other words, the short arm (i.e., the second radiating arm) of the radiator 100 of the antenna assembly 10 provided by the embodiment of the present application is lengthened. Therefore, the second radiating portion 120 has a longer length, so that the second radiating portion 120, the first radiating portion 110 and the third radiating portion 130 can be well excited, and the second radiating portion is used for generating a half-wavelength mode under the excitation of the second excitation signal so as to support the second target frequency band.

Referring to fig. 12 together, fig. 12 is a schematic diagram of an antenna assembly according to another embodiment of the application. In this embodiment, the antenna assembly 10 further includes a matching circuit 200. The matching circuit 200 is electrically connected between the feed source S0 and the feed end 121, and the matching circuit 200 is configured to adjust a resonance frequency point of the first target frequency band. It should be understood that, in the schematic diagram of the present embodiment, the antenna assembly 10 further includes the matching circuit 200, which is illustrated in fig. 7 by way of example, and should not be construed as limiting the antenna assembly 10 provided in the embodiment of the present application. The antenna assembly 10 further includes a matching circuit 200 that may be incorporated into the antenna assembly 10 provided in any of the previous embodiments of fig. 5, etc.

The matching circuit 200 is also referred to as a lumped element. Since the first target frequency band includes a high frequency band, the second target frequency band includes an intermediate frequency band. The dimension L of the electrical length of the second radiation portion 120 is L1L 2, where L1 is an electrical length corresponding to a quarter wavelength mode of 2.5GHz, and L2 is an electrical length corresponding to a quarter wavelength mode of 2.4GHz, so that the second radiation portion 120 has a longer length, and the second radiation portion 120, the first radiation portion 110, and the third radiation portion 130 can be better excited to generate a half wavelength mode under the excitation of the second excitation signal, so as to support the second target frequency band. Therefore, the resonance of the first target frequency band is lowered, for example, to 2.4 ghz-2.5 ghz. The antenna assembly 10 further includes the matching circuit 200, so that the resonance frequency point of the first target frequency band is the same as the first target frequency band. For example, the antenna assembly 10 further includes the matching circuit 200 to adjust the resonance frequency point of the first target frequency band, so that the first target frequency band better supports the high frequency band. For example, the first target frequency band is made to be 2.5 ghz-2.7 ghz.

It will be understood that when a range is exemplified in an embodiment of the application, then that range includes both endpoints, and numerical values between the two endpoints. For example, the range A-B includes an end point A, an end point B, and a value (i.e., a value greater than A and less than B) between the end point A and the end point B.

Referring to fig. 13 and 14 together, fig. 13 is a detailed schematic diagram of the antenna assembly shown in fig. 12, and fig. 14 is a specific circuit schematic diagram of the antenna assembly shown in fig. 13 according to an embodiment. The matching circuit 200 includes at least one of a first matching device 210 and a second matching device 220. When the matching circuit 200 includes a first matching device 210, one end of the first matching device 210 is electrically connected to the feed source S0, and the other end of the first matching device 210 is electrically connected to the feed terminal 121, wherein the first matching device 210 includes one of a capacitance and an inductance. When the matching circuit 200 includes a second matching device 220, one end of the second matching device 220 is electrically connected to the feeding terminal 121, and the other end of the second matching device 220 is grounded, wherein the second matching device 220 includes the other of the capacitance and the inductance.

Referring to fig. 13, in this embodiment, the matching circuit 200 includes a first matching device 210 and a second matching device 220. It will be appreciated that in other embodiments, the matching circuit 200 may include the first matching device 210 and not the second matching device 220. Or in other embodiments, the matching circuit 200 may include the second matching device 220 and not the first matching device 210.

Referring to fig. 14, the first matching device 210 includes an inductor, and the second matching device 220 includes a capacitor. In other embodiments, the first matching device 210 includes a capacitor and, correspondingly, the second matching device 220 includes an inductor.

In an embodiment of the present application, the matching circuit 200 includes at least one of a first matching device 210 and a second matching device 220. When the matching circuit 200 includes a first matching device 210, one end of the first matching device 210 is electrically connected to the feed source S0, and the other end of the first matching device 210 is electrically connected to the feed terminal 121, wherein the first matching device 210 includes one of a capacitance and an inductance. When the matching circuit 200 includes the second matching device 220, one end of the second matching device 220 is electrically connected to the feeding end 121, and the other end of the second matching device 220 is grounded, where the second matching device 220 includes the other one of the capacitor and the inductor, and the resonance frequency point of the first target frequency band can be better adjusted, so that the first target frequency band better supports the high frequency band.

Further, in one embodiment, when an inductance is included, the inductance value L0 of the inductance satisfies that L0 is 3nH or less. When the capacitor is included, the capacitance value C0 of the capacitor is equal to or less than 1.8pF.

When the inductor is included, the inductance value L0 of the inductor meets the condition that L0 is less than or equal to 3nH, so that the resonance frequency point of the first target frequency band can be well adjusted, and the first target frequency band can well support a high-frequency band.

When the capacitor is included, the capacitance value C0 of the capacitor is smaller than or equal to 1.8pF, so that the resonance frequency point of the first target frequency band can be well adjusted, and the first target frequency band can well support the high-frequency band.

Referring to fig. 15, fig. 15 is a schematic diagram of an antenna assembly according to another embodiment of the application. In this embodiment, the antenna assembly 10 further includes a matching circuit 200 and a switching circuit 300. The matching circuit 200 is electrically connected between the feed source S0 and the feed end 121, and the matching circuit 200 is configured to adjust a resonance frequency point of the first target frequency band. The matching circuit 200 is described above, and will not be described herein.

The first radiating portion 110 has a connection point P1, and the connection point P1 and the feeding end 121 are disposed at a distance. The connection point P1 is electrically connected to the switching circuit 300. The switch circuit 300 is configured to adjust the electrical length of the radiator 100 when the antenna assembly 10 supports the corresponding target frequency band, so that the antenna assembly 10 supports the sub-band of the corresponding target frequency band. For example, when the antenna assembly 10 supports the first target frequency band, the switch circuit 300 is configured to adjust the electrical length of the radiator 100 so that the antenna assembly 10 supports a different first sub-frequency band of the first target frequency band. Specifically, the switching circuit 300 includes a switch 310 and a plurality of matching branches 320. One end of the matching branch 320 is grounded, and the switch 310 is configured to electrically connect the other end of one of the matching branches 320 to the connection point P1. When the switch 310 is electrically connected to different matching branches 320, the antenna assembly 10 supports different first sub-bands of the first target band.

For another example, when the antenna assembly 10 supports the second target frequency band, the switch circuit 300 is configured to adjust the electrical length of the radiator 100 so that the antenna assembly 10 supports a different second sub-frequency band in the second target frequency band. Specifically, referring to fig. 16 together, fig. 16 is a schematic diagram of an antenna assembly according to another embodiment of the present application. In this embodiment, the antenna assembly 10 further includes a matching circuit 200 and a switching circuit 300. The matching circuit 200 is electrically connected between the feed source S0 and the feed end 121, and the matching circuit 200 is configured to adjust a resonance frequency point of the first target frequency band. The matching circuit 200 is described above, and will not be described herein.

In addition, the switching circuit 300 includes a switch 310 and a plurality of matching branches 320. One end of the matching branch 320 is grounded, and the switch 310 is configured to electrically connect the other end of one of the matching branches 320 to the connection point P1. When the switch 310 is electrically connected to a different matching branch 320, the antenna assembly 10 supports a different second sub-band of the second target frequency band.

When the switching circuit 300 includes four matching branches 320, the switch 310 may be, but is not limited to being, a single pole, four throw switch (SP 4T). Further, when the switching circuit 300 includes four matching branches 320, the switch 310 may include four sub-switches 310, each sub-switch 310 being electrically connected to one matching branch 320, and different sub-switches 310 being electrically connected to different matching branches 320. It will be appreciated that the number of matching branches 320 in the switching circuit 300 may be 2, or 3, or even more.

Referring to fig. 17, fig. 17 is a schematic diagram of S parameters of an antenna assembly and an antenna assembly according to an embodiment of the application. For convenience of illustration, (a) in fig. 17 is a color chart, and (b) in fig. 17 is a gray chart of (a) in fig. 17. In fig. 17, the abscissa is Frequency (Frequency) in GHz, and the ordinate is S parameter in dB. Three curves are included, each being an S11 parameter (S-Parameters) curve for the antenna assembly 10. Wherein curve ① is the blue curve in fig. 17 (a) and is the S11 parameter curve in the related art, curve ② is the green curve in fig. 17 (a) and is the S11 parameter curve of the antenna assembly 10 provided with the lengthened short arm but without the matching circuit 200 according to the embodiment of the application, and curve ③ is the red curve in fig. 17 (a) and is the S11 parameter curve of the antenna assembly 10 lengthened short arm and including the matching circuit 200 shown in fig. 14. As can be seen from the curves ① and ②, the first target frequency band supported by the antenna assembly 10, which is provided by the embodiment of the present application, is pulled down compared to the first target frequency band supported by the antenna assembly 10 of the related art, which is a short arm that is lengthened but does not include the matching circuit 200. As can be seen from the curves ② and ③, the matching circuit 200 of the antenna assembly 10 according to the embodiment of the present application can better adjust the resonant frequency point of the first target frequency band. Compared with the curve ②, the curve ③ pulls up the resonant frequency band of the first target frequency band, so that the resonant frequency point of the first target frequency band is pulled to a proper position, and the first target frequency band better supports the high frequency band.

Further, in combination with any of the preceding embodiments, the radiator 100 is further configured to support a third target frequency band, where a frequency of the third target frequency band is less than a frequency of the second target frequency band.

In the antenna assembly 10 provided in an embodiment, the antenna assembly 10 can support not only the first target frequency band and the second target frequency band, but also the third target frequency band, so that the antenna assembly 10 can meet the communication requirements in the first target frequency band, the second target frequency band and the third target frequency band.

In one embodiment, the first target frequency Band includes a High frequency Band (HB), the second target frequency Band includes a Middle frequency Band (MB), and the third target frequency Band includes a Low frequency Band (LB). In other words, the antenna assembly 10 supports the LB band+mb band+hb band, i.e., LMHB band. Thus, the antenna assembly 10 can meet the communication requirements in the LB band, MB band and HB band.

In one embodiment, the first target frequency band comprises a wireless fidelity technology (WIRELESS FIDELITY, WIFI) 5G frequency band (i.e., a WiFi 5G frequency band), the second target frequency band comprises a WiFi 2.4G frequency band, and the third target frequency band comprises a global positioning system (Global Positioning System, GPS) frequency band. In other words, the antenna assembly 10 may support the GPS band+WiFi 2.4G band+WiFi 5G band. Therefore, the antenna assembly 10 can meet the communication requirements of GPS band, wiFi 2.4G band, and WiFi 5G band.

In one embodiment, the first target frequency band comprises a UHB band, the second target frequency band comprises a medium and high frequency MHB band, and the third target frequency band comprises a LB band. In other words, the antenna assembly 10 may support LB band+MHB band+UHB band. Thus, the antenna assembly 10 is capable of meeting the communication requirements of the LB band, the MHB band, and the UHB band. Wherein when the first target frequency band comprises a UHB frequency band, the first target frequency band may comprise at least one of an N77 frequency band and an N78 frequency band. As can be seen from the foregoing description of the antenna assembly 10, the SAR value can be reduced when the antenna assembly 10 supports the first target frequency band, and thus, when the first target frequency band supported by the antenna assembly 10 includes a UHB frequency band, and the UHB frequency band includes at least one of an N77 frequency band and an N78 frequency band, the antenna assembly 10 can also reduce SAR for the N77 frequency band and the N78 frequency band.

Referring to fig. 18, fig. 18 is a diagram illustrating comparison of parameters such as SAR values when the antenna assembly according to an embodiment of the present application supports each frequency band with the antenna assembly according to the related art. In this table, "normalized back-off" means that when the SAR value of the antenna assembly 10 exceeds the standard, power back-off is required to be performed on the antenna assembly 10 so that the antenna assembly 10 satisfies the SAR safety regulations. The smaller the value corresponding to the "normalized back-off" field, the better the value, which indicates that the SAR value of the corresponding antenna assembly 10 is not excessive. "TRP" in "normalized TRP" means total radiated power (Total Radiatedpower). The "normalized TRP" specifically refers to an average value of external radiation power of the electronic device 1 applied by the antenna assembly 10 in a stereoscopic and omnidirectional direction, and can comprehensively measure the radiation performance of the whole machine of the electronic device 1. The larger the "normalized TRP" is, the better the radiation performance of the antenna assembly 10 is. The "benefit" in the table represents the value of the "normalized TRP" of the antenna assembly 10 of the present case minus the number of the "normalized TRP" of the antenna assembly 10 of the related art in dB. It should be noted that the "benefits" in the table are compared with the performance of the antenna assembly 10 according to the embodiment of the present application and the performance of the antenna assembly 10 in the related art under the same frequency band.

As can be seen from fig. 18, under the same SAR standard, compared with the related art, the performance of the electronic device 1 applied with the antenna assembly 10 according to the embodiment of the application in the transmission frequency band (Tx) of the intermediate frequency and the high frequency can be improved by 1dB or more.

It should be noted that, in fig. 18, only a portion of the long term evolution (Long Term Evolution, LTE) frequency band supported by the antenna assembly 10 is taken as an example for comparison, and it is understood that the method is also applicable to the 2G or 3G or 4G or 5G frequency band with the frequency range between 1.5ghz and 3 ghz. Accordingly, since the SAR value of the low frequency band is relatively low, the antenna assembly 10 provided in the embodiments of the present application does not describe the low frequency band much. Accordingly, the scheme for reducing the SAR value in the embodiment of the present application can also be used for reducing the SAR value in the low frequency band.

In summary, in the antenna assembly 10 provided in the embodiment of the present application, the SAR value is lower when the first target frequency band is supported. When the antenna assembly 10 provided in the embodiment of the present application supports the first target frequency band, no power back-off is required, or only a smaller power back-off is required. When the electronic device 1 to which the antenna assembly 10 is applied uses the first target frequency band for communication, the SAR standard is met. In addition, the transmission frequency band (Tx) performance of the first target frequency band may be improved. Therefore, the uploading rate and the downloading rate can be improved, the time delay when the first target frequency band is utilized for communication is reduced, and the traffic performance and the user experience are improved.

In summary, in The era of The development of antenna technology (such as 5G multi-band, multi-antenna, and Multiple Input Multiple Output (MIMO) technology), the antenna assembly 10 according to an embodiment of The present application can realize The requirements of low SAR and high Over The Air (OTA) on a small space requirement, so as to improve The transmission band (Tx) performance of The intermediate frequency band and The high frequency band, and obtain higher and better TRP performance.

The embodiment of the application also provides the electronic equipment 1. Referring to fig. 19 and 20, fig. 19 is a schematic perspective view of an electronic device according to an embodiment of the application, and fig. 20 is a schematic view of a part of the electronic device shown in fig. 19. Fig. 19 is a schematic diagram of the electronic device 1 in fig. 18 from the back view angle, which is a schematic diagram of the electronic device 1 from the housing 30 looking toward the display 20, and the housing 30 is omitted for the convenience of viewing the internal structure of the electronic device 1, and the radiator 100 is simplified, and only the position of the radiator 100 is shown. The electronic device 1 includes, but is not limited to, devices capable of transmitting and receiving electromagnetic wave signals such as a mobile phone, a telephone, a television, a tablet personal computer (Pad), a camera, a personal computer, a notebook computer (Personal Computer, PC), a vehicle-mounted device, an earphone, a wristwatch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (Customer Premise Equipment, CPE), a large screen terminal, and the like. In the present application, the electronic device 1 is taken as an example of a mobile phone, and other devices may refer to the specific description in the present application.

The electronic device 1 comprises an antenna assembly 10. The antenna assembly 10 is described in any of the foregoing embodiments, and will not be described in detail herein. In an embodiment, the radiator 100 in the antenna assembly 10 is located on top of the electronic device 1.

In the present embodiment, the top portion is a portion of the electronic apparatus 1 located above in the portrait mode. When the radiator 100 in the antenna assembly 10 is located at the top of the electronic device 1, shielding of the radiator 100 of the antenna assembly 10 by a human body can be reduced, so that antenna performance when the antenna assembly 10 supports each target frequency band (e.g., a first target frequency band, a second target frequency band, and a third target frequency band) is improved.

It will be appreciated that in other embodiments, the radiator 100 may also be located at the bottom, in the middle, etc. of the electronic device 1.

Further, with continued reference to fig. 19 and 20, the electronic device 1 includes a top edge 1a and a side edge 1b that are connected by bending. Wherein the length of the side edge 1b is greater than the length of the top edge 1 a. A portion of the radiator 100 is disposed corresponding to the top edge 1a and another portion of the radiator 100 is disposed corresponding to the side edge 1b.

The length of the side edge 1b is greater than the length of the top edge 1a, so that the top edge 1a is also referred to as a short side of the electronic device 1 and the side edge 1b is also referred to as a long side of the electronic device 1. When the electronic device 1 is in the vertical screen state, the top edge 1a is the top edge of the electronic device 1. The side edge 1b is bent to connect with the top edge 1a, and in the illustrated view, the side edge 1b is taken as the left side edge of the electronic device 1 as an example, it will be appreciated that in other embodiments, the side edge 1b may be the right side edge of the electronic device 1.

The part of the radiator 100 is arranged corresponding to the top edge 1a, and the other part of the radiator 100 is arranged corresponding to the side edge 1b, so that the position of the radiator 100 corresponding to the top edge 1a and the side edge 1b of the electronic device 1 can be fully utilized, the radiator 100 and other parts of the electronic device 1 can be conveniently assembled, on the other hand, shielding of a human body on the radiator 100 of the antenna assembly 10 can be reduced, and the antenna assembly 10 has better antenna performance when supporting each target frequency band.

In an embodiment, the electronic device 1 further includes a middle frame 40, a display 20, and a housing 30 (also referred to as a battery cover). The display 20 and the housing 30 are respectively disposed on two opposite sides of the middle frame 40.

In addition, in an embodiment, the middle frame 40 and at least one of the housing 30 and the display 20 further form a receiving space. The antenna assembly 10 is located in the accommodating space. The electronic device 1 further includes a device capable of implementing a basic function of the mobile phone, such as a functional device disposed in the accommodating space, which is not described in detail in this embodiment. It should be understood that the above description of the electronic device 1 is merely illustrative of one environment in which the antenna assembly 10 may be used, and the specific structure of the electronic device 1 should not be construed as limiting the antenna assembly 10 provided by the present application. In other embodiments, the electronic device 1 may not include at least one of the display 20 and the housing 30.

In an embodiment, the electronic device 1 further includes a front camera 510, a rear camera 520, a circuit board 530, a battery 540, a speaker 550, a universal serial bus interface (Universal Serial Bus, USB) also referred to as a USB port 560, a headphone jack 570, a sensor (REC) 580, and the like. The front camera 510, the sensor 580 and the rear camera 520 are all located on top of the electronic device 1, and in the schematic diagram of the present embodiment, the radiator 100 is illustrated as being adjacent to the front camera 510, and it should be understood that the embodiment of the present application is not limited thereto. The feed S0 of the antenna assembly 10 may be located on the circuit board 530. The speaker 550, the USB port 560, and the earphone jack 570 are all disposed corresponding to the bottom of the electronic device 1.

It will be appreciated that the electronic device 1 may include other antennas in addition to the antenna assembly 10 provided by the embodiments of the present application. Of course, the electronic device 1 may not comprise other antennas.

With continued reference to fig. 19, in one embodiment, the electronic device 1 has a top surface 1c and a first side surface 1d bent and connected to the top surface 1 c. The top end surface 1c may be an end surface of the electronic device 1 at the top, and the first side surface 1d may be an end surface of the electronic device 1 at the side. A portion of the radiator 100 is disposed corresponding to the tip end face 1c, and a portion of the radiator 100 is disposed corresponding to the first side face 1d. For example, a portion of the first radiating portion 110 and a portion of the third radiating portion 130 are disposed corresponding to the top end surface 1c, and the rest of the third radiator 100 is disposed corresponding to the first side surface 1d.

Furthermore, the electronic device 1 has a second side 1e. The second side surface 1e is respectively connected with the top end surface 1c and the first side surface 1d in a bending manner. In the schematic diagram of the present embodiment, the second side surface 1e may be a surface on the side of the display screen 20 of the electronic device 1, and it is understood that in other embodiments, the second side surface 1e may be a surface on the side of the housing 30 of the electronic device 1. The rest of the first radiation portion 110 and the second radiation portion 120 are disposed corresponding to the second side surface 1e.

In this way, the radiator 100 can make full use of the stereoscopic space of the electronic device 1, and is convenient to be disposed in the electronic device 1, so that the radiator 100 can be applied to the electronic device 1 having a small size.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the application, and such changes and modifications are intended to be included within the scope of the application.

Claims

1. The antenna assembly is characterized by comprising a feed source and a radiator, wherein the feed source is used for generating a first excitation signal, and the radiator comprises:

The second radiation part is provided with a feed end and a first free end, a first gap is reserved between the feed end and the grounding end, the feed end is electrically connected with the grounding end, and the first free end is away from the grounding end compared with the feed end and is provided with a second electric length which is smaller than the first electric length;

2. The antenna assembly of claim 1, wherein the second radiating portion is configured to generate a quarter wavelength mode under excitation of the first excitation signal to support the first target frequency band.

3. The antenna assembly of claim 1, wherein the ground terminal has a first side and a second side that are bent and connected;

the third edge is opposite to the first edge and is arranged at intervals to form the first gap;

The radiator is further provided with a connecting part, one end of the connecting part is connected to one end of the second side, which is away from the first side, so that a second gap is formed between the connecting part and the second side of the grounding end, and the second gap is communicated with the first gap.

4. The antenna assembly of claim 3 wherein said feed end further has a fourth side, said fourth side being folded and connected to said third side;

the other end of the connecting portion is connected to one end, deviating from the third side, of the fourth side, so that a third gap is formed between the connecting portion and the feeding end, wherein the third gap is communicated with the first gap, and the third gap is communicated with the second gap.

5. The antenna assembly of claim 1, wherein the feed is further configured to generate a second excitation signal, the feed is further configured to receive the second excitation signal, and the second radiating portion, the first radiating portion, and the third radiating portion are configured to generate a half wavelength mode upon excitation by the second excitation signal to support a second target frequency band, wherein the second target frequency band has a frequency that is less than a frequency of the first target frequency band.

6. The antenna assembly of claim 5, wherein the second free end is adjacent the first free end with a first gap between the third radiating portion and the first radiating portion and a second gap between the third radiating portion and the second radiating portion, the second gap being in communication with the first gap.

7. The antenna assembly of claim 5 wherein the radiator has a hot spot region when the radiator supports the second target frequency band, the entirety of the second radiating portion, the first radiating portion, and the third radiating portion having a midpoint, the midpoint being located in the hot spot region.

8. The antenna assembly of claim 5, wherein the first target frequency band comprises a high frequency band and the second target frequency band comprises an intermediate frequency band, and wherein the second radiating portion has an electrical length L of a dimension L1 L≤L≤L2, wherein L1 is an electrical length corresponding to a quarter wavelength mode of 2.5GHz and L2 is an electrical length corresponding to a quarter wavelength mode of 2.4 GHz.

9. The antenna assembly of claim 8, wherein the antenna assembly further comprises:

the matching circuit is electrically connected between the feed source and the feed end and is used for adjusting the resonance frequency point of the first target frequency band.

10. The antenna assembly of claim 9 wherein the matching circuit comprises at least one of a first matching device and a second matching device,

When the matching circuit comprises a first matching device, one end of the first matching device is electrically connected to the feed source, and the other end of the first matching device is electrically connected to the feed end, wherein the first matching device comprises one of a capacitor and an inductor;

When the matching circuit comprises a second matching device, one end of the second matching device is electrically connected to the feed end, and the other end of the second matching device is grounded, wherein the second matching device comprises the other one of a capacitor and an inductor.

11. The antenna assembly of claim 10, wherein when an inductance is included, an inductance value L0 of the inductance satisfies L0 < 3nH;

when the capacitor is included, the capacitance value C0 of the capacitor is equal to or less than 1.8pF.

12. The antenna assembly of claim 5, wherein the radiator is further configured to support a third target frequency band, the third target frequency band having a frequency that is less than the frequency of the second target frequency band.

13. The antenna assembly of claim 12, wherein the first target frequency band comprises an HB frequency band, the second target frequency band comprises an MB frequency band, and the third target frequency band comprises an LB frequency band;

or the first target frequency band comprises a WiFi 5G frequency band, the second target frequency band comprises a WiFi 2.4G frequency band, and the third target frequency band comprises a GPS frequency band;

Or the first target frequency band comprises a UHB frequency band, the second target frequency band comprises a MHB frequency band, and the third target frequency band comprises a LB frequency band.

14. An electronic device comprising an antenna assembly according to any of claims 1-13, wherein the radiator in the antenna assembly is located on top of the electronic device.

15. The electronic device of claim 14, wherein the electronic device comprises a top edge and a side edge connected by a bend, wherein the length of the side edge is greater than the length of the top edge, a portion of the radiator is disposed corresponding to the top edge, and another portion of the radiator is disposed corresponding to the side edge.