CN112736454B

CN112736454B - Antenna assembly and electronic equipment

Info

Publication number: CN112736454B
Application number: CN202011564599.3A
Authority: CN
Inventors: 林思颖
Original assignee: Realme Chongqing Mobile Communications Co Ltd
Current assignee: Realme Chongqing Mobile Communications Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2023-04-07
Anticipated expiration: 2040-12-25
Also published as: CN112736454A

Abstract

The embodiment of the application provides an antenna assembly and electronic equipment, the antenna assembly includes a ground plane, a first radiator and a signal source, the signal source is used for accessing a radio frequency signal, the first radiator includes a ground point and a feed point, the ground point is used for connecting the ground plane, the feed point is used for connecting the signal source, the first radiator further includes a first branch, a second branch and a third branch, the first branch surrounds the second branch and the third branch through a bending structure, wherein the first branch is used for exciting a low-frequency resonance mode, and covers a first 5G frequency band through frequency doubling excited by the low-frequency resonance mode, the second branch is used for exciting a first high-frequency resonance mode to cover a second 5G frequency band, and the third branch is used for exciting a second high-frequency resonance mode to cover a third 5G frequency band. The antenna module that this application embodiment provided can be through the signal of three different frequency channels of three minor matters radiation of first radiation section, can effectively promote the antenna radiation performance of equipment.

Description

Antenna assembly and electronic equipment

Technical Field

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

Background

With the rapid development of communication technology, communication devices have become an indispensable tool in people's lives, and great convenience is brought to various aspects of user lives. A plurality of antennas generally exist on a communication device, and particularly, the frequency bands and the number of antennas of a 5G device are increased in the future. However, in the prior art, if more antennas are to be implemented or more frequency bands are to be covered, a more complex circuit structure needs to be arranged on the communication device to implement more antenna coverage, which also results in a more complex and compact overall antenna layout and a larger mutual coupling effect between the antennas.

Disclosure of Invention

The embodiment of the application provides an antenna module and an electronic device, and the radiation performance of an antenna can be improved.

An embodiment of the present application provides an antenna assembly, includes:

a ground plane;

the signal source is used for accessing a radio frequency signal;

the first radiator comprises a grounding point and a feeding point, the grounding point is used for being connected with the grounding plane, the feeding point is used for being connected with the signal source, the first radiator further comprises a first branch, a second branch and a third branch, the first branch surrounds the second branch and the third branch through a bending structure, the first branch is used for exciting a low-frequency resonance mode and covers a first 5G frequency band through frequency doubling excited by the low-frequency resonance mode, the second branch is used for exciting a first high-frequency resonance mode to cover a second 5G frequency band, and the third branch is used for exciting a second high-frequency resonance mode to cover a third 5G frequency band.

An embodiment of the present application further provides an electronic device, where the electronic device includes a housing and an antenna assembly, where the antenna assembly is located inside the housing, and the antenna assembly includes:

a ground plane;

the signal source is used for accessing a radio frequency signal;

The antenna assembly and the electronic device provided by the embodiment of the application, the antenna assembly comprises a ground plane, a first radiator and a signal source, the signal source is used for accessing a radio frequency signal, the first radiator comprises a ground point and a feed point, the ground point is used for connecting the ground plane, the feed point is used for connecting the signal source, the first radiator further comprises a first branch, a second branch and a third branch, the first branch surrounds the second branch and the third branch through a bending structure, the first branch is used for exciting a low-frequency resonance mode and covers a first 5G frequency band through frequency doubling excited by the low-frequency resonance mode, the second branch is used for exciting a first high-frequency resonance mode to cover a second 5G frequency band, and the third branch is used for exciting a second high-frequency resonance mode to cover a third 5G frequency band. The antenna module that this application embodiment provided can be through the signal of three different frequency channels of three minor matters radiation of first radiation section, can effectively promote the antenna radiation performance of equipment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a first radiator according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a second structure of the first radiator according to an embodiment of the present disclosure.

Fig. 5 is a schematic view of a third structure of the first radiator according to the embodiment of the present application.

Fig. 6 is a schematic structural diagram of a second electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The embodiment of the application provides a display screen assembly and electronic equipment. The details will be described below, respectively. The display screen assembly can be arranged in the electronic device, and the electronic device can be a smart phone, a tablet computer and the like.

Referring to fig. 1, fig. 1 is a schematic view of a first structure of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 includes a display 11, a housing 12, a circuit board 13, and a battery 14.

The display screen 11 is disposed on the casing 12 to form a display surface of the electronic device 100, and is used for displaying images, texts, and other information. The Display 11 may include a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display.

A cover plate may also be mounted on the display screen 11 to cover the display screen 11. The cover plate can be a transparent glass cover plate, so that the display screen can display through the transparent cover plate. In some embodiments, the cover plate may be a glass cover plate made of a material such as sapphire.

The display screen 11 may include a display area and a non-display area. The display area may be used to display a screen of the electronic device 100 or provide a user with touch control. The top area of the non-display area is provided with an opening for conducting sound and light, and the bottom of the non-display area can be provided with functional components such as a fingerprint module, a touch key and the like.

The structure of the display panel 11 is not limited to this. For example, the display screen 11 may be a full-screen or an odd-screen. It should be further noted that, in some embodiments, the display screen 11 may not include the non-display area, but is configured as a full-screen structure, and functional components such as a distance sensor, an ambient light sensor, and the like may be disposed below the display screen or at other positions. Wherein, the apron is fit for the size setting of display screen.

The housing 12 is used to form an outer contour of the electronic apparatus 100 so as to accommodate electronic devices, functional components, and the like of the electronic apparatus 100, while providing sealing and protecting functions for the electronic devices and functional components inside the electronic apparatus. For example, the camera, the circuit board, and the vibration motor of the electronic device 100 may be disposed inside the housing 12.

The case 12 may include a middle frame and a rear cover combined with each other to form the case 12, and the middle frame and the rear cover may form a receiving space to receive the circuit board 13, the display screen 11, the battery 14, and the like. Further, a cover plate may be fixed to the case 12, the cover plate and the case 12 forming a closed space to accommodate the circuit board 13, the display screen 11, the battery 14, and the like. In some embodiments, a cover plate is attached to the center frame, a rear cover is attached to the center frame, the cover plate and the rear cover are located on opposite sides of the center frame, and the cover plate and the rear cover are located opposite each other.

In some embodiments, the housing 12 may be a metal housing, such as a metal such as magnesium alloy, stainless steel, and the like. It should be noted that the material of the housing 12 according to the embodiment of the present application is not limited thereto, and other manners may also be adopted, such as: the housing 12 may be a plastic housing. Further examples are: the housing 12 is a ceramic housing. For another example: the housing 12 may include a plastic part and a metal part, and the housing 12 may be a housing structure in which metal and plastic are matched with each other, specifically, the metal part may be formed first, for example, a magnesium alloy substrate is formed by injection molding, and then plastic is injected on the magnesium alloy substrate to form a plastic substrate, so as to form a complete housing structure.

A circuit board 13 is disposed inside the housing 12. The circuit board 13 may be a main board of the electronic device 100. One or more functional components such as a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, and a motor may be integrated on the circuit board 13. Meanwhile, the display screen 11 may be electrically connected to the circuit board 13 to control the display of the display screen 11 by a processor on the circuit board 13.

In some embodiments, the circuit board 13 may be secured within the housing 12. Specifically, the circuit board 13 may be screwed to the middle frame by screws, or may be snap-fitted to the middle frame by means of fasteners. It should be noted that the way in which the circuit board 13 is specifically fixed to the middle frame in the embodiment of the present application is not limited to this, and other ways such as a way of jointly fixing through a snap and a screw may also be used.

The battery 14 is disposed inside the housing 12. Meanwhile, the battery 14 is electrically connected to the circuit board 13 to enable the battery 14 to power the electronic device 100. Wherein, the circuit board 13 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by battery 14 to the various electronic devices in electronic apparatus 100.

Wherein, an antenna assembly 200 is further provided in the electronic device 100. The antenna assembly 200 is used for implementing a wireless Communication function of the electronic device 100, for example, the antenna assembly 200 may be used for implementing a Near Field Communication (NFC) function. The antenna assembly 200 is disposed inside the housing 20 of the electronic device 100. It is understood that some components of the antenna assembly 200 may be integrated on the circuit board 13 inside the housing 12, for example, the signal processing chip and the signal processing circuit in the antenna assembly 200 may be integrated on the circuit board 13. Furthermore, some components of the antenna assembly 200 may also be disposed directly inside the housing 12. An antenna, such as the antenna assembly 200, may be disposed directly inside the housing 12.

In the prior art, 5G mobile phones are actively introduced by various manufacturers, and for antennas, for the research and development of 5G mobile phones, the speed of uploading and downloading can be increased only by multiple transmissions and multiple receptions based on a radio frequency scheme, and then multiple antennas are designed for support. In the current 5G frequency band, schemes such as 1T2R, 1T4R, or 2T4R are designed, which requires more antennas to implement the receiving function. The size of the mobile phone is large, multiple antennas need to be designed in a limited space, mutual coupling influence among the antennas needs to be considered, difficulty challenges are large, and therefore matching of antennas in various frequency ranges is achieved. According to the antenna scheme design, in a limited complex environment space, the N1 frequency band frequency multiplication is realized by using the unused low frequency, and the combination of the eigenmodes of the N41 frequency band and the N78 frequency band is added, so that the 5G MIMO antenna with high radiation efficiency is designed.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an antenna assembly according to an embodiment of the present disclosure. The antenna assembly 100 may include a ground plane 21, a first radiator 22, and a signal source 26. The signal source 26 is configured to feed an excitation signal to the first radiator 22, and the first radiator 22 may be connected to the ground plane 21 through a connection element, where the number of the connection elements may be one or two, for example, the first radiator 22 includes two grounding points and a feeding point, the two grounding points are configured to be connected to the ground plane, the feeding point is configured to be connected to the signal source, where the two grounding points may be respectively disposed on two sides of the feeding point, as shown in fig. 2, where the two grounding points of the first radiator 22 are respectively connected to two connection elements for grounding, and are respectively a first connection element and a second connection element.

Specifically, the connecting member for connecting the ground plane 21 may be a connecting wire, one end of which is electrically connected to the ground point on the first radiator 22, and the other end of which is electrically connected to the ground plane 21. In other embodiments, the connecting member may be a thin sheet metal. For example, the first and second connectors may be magnesium alloy sheets, aluminum alloy sheets, or the like. The first and second connectors are respectively disposed at two ground points on the first radiator 22 and coupled to the ground plane 21. For example, when a metal bezel is used as the first radiator 22, the first and second connectors may be attached to the metal bezel of the electronic device, so that the first and second connectors are coupled to the metal bezel. After coupling, the first connecting piece and the second connecting piece can be conducted with the metal frame through electric signals.

In an embodiment, the antenna assembly may further include a second radiator 23, the second radiator 23 is provided with a grounding point and a feeding point, the grounding point is used for connecting to the grounding plane, the feeding point is used for connecting to a signal source, the second radiator 23 is used for receiving and transmitting 5G (5 th generation mobile networks or 5th generation wireless systems, fifth generation mobile communication technology) radio frequency signals, and the first radiator 22 is used for receiving the 5G radio frequency signals.

In an embodiment, the antenna assembly may further include a third radiator 24 and a fourth radiator 25, where the third radiator 24 and the fourth radiator 25 are both provided with a grounding point and a feeding point, the grounding point is used for connecting to the grounding plane, the feeding point is used for connecting to a signal source, the third radiator 24 may be used for receiving and transmitting 4G (the 4th generation mobile communication technology) radio frequency signals, and the fourth radiator 25 may be used for receiving and transmitting WiFi radio frequency signals. It should be noted that the frequency band corresponding to the 4G radio frequency signal may include B1/B2/B3/B4/B5/B6/B7/B8/B9/B12/B17/B18/B19/B20/B26/B28, etc., and the frequency band corresponding to the 5G radio frequency signal may include N1/N3/N5/N8/N28/N77/N78/N79, etc., which is not further limited in this embodiment.

In an embodiment, the first radiator 22, the second radiator 23, the third radiator 24 and the fourth radiator 25 may be a part of a metal frame of an electronic device, and a gap is disposed between the first radiator 22 and the third radiator 24, a gap is disposed between the third radiator 24 and the fourth radiator 25, and a gap is disposed between the fourth radiator 25 and the second radiator 23. In this embodiment, the gap may be filled with air or a non-conductive material, such as plastic. The gap between two radiators is equivalent to a coupling capacitor, and the size of the coupling capacitor is mainly related to the end surface area of the radiators on two sides, the width of the gap and the medium filled in the gap. The gap is filled with the non-conductive material, so that the structural strength of the antenna structure can be improved, and the antenna structure can be more attractive.

It should be noted that the ground plane 21 can be regarded as a reference ground of the whole device. The grounding points arranged on the first radiator 22, the second radiator 23, the third radiator 24 and the fourth radiator 25 can be fixedly connected to the whole machine reference ground by welding, and the grounding points can also be fixedly connected to the whole machine reference ground by screwing and locking screws. In other embodiments, the plurality of grounding points may be further connected to the complete machine reference ground through a connecting wire.

In an embodiment, the grounding may also be performed by providing a grounding branch, for example, when the first radiator 22 includes two grounding points, which are a first grounding point and a second grounding point, respectively, a grounding branch may be provided at each of the first grounding point and the second grounding point, and a control switch may be further provided on the grounding branch to control a grounding state. It should be noted that both of the above-mentioned grounding points can be grounded by means of a connecting piece or a grounding branch, for example, a first grounding point can be grounded by connecting the connecting piece to the grounding plane 21, and a second grounding point can be grounded by means of a grounding branch.

In an embodiment, such as an electronic device comprising a rectangular bezel, the metal bezel further comprises a top side and two side edges, a left side edge and a right side edge, preferably, the first radiator 22 can be disposed on the left side edge, the second radiator 23 can be disposed on the right side edge, the third radiator 24 can be disposed at the junction of the left side edge and the top side, and the fourth radiator 25 can be disposed at the junction of the right side edge and the top side.

Continuing to refer to fig. 3, fig. 3 is a schematic structural diagram of a first radiator according to an embodiment of the present disclosure. The first radiator 22 includes a grounding point 222 and a feeding point 221, the grounding point 222 is used for connecting to a grounding plane, and the feeding point 221 is used for connecting to a signal source. The first radiator 22 further includes a first branch 223, a second branch 224, and a third branch 225, the first branch 223 surrounds the second branch 224 and the third branch 225 through a bent structure, wherein the first branch 223 is used for exciting a low-frequency resonance mode, and covers a first 5G frequency band by frequency doubling excited by the low-frequency resonance mode, the second branch 224 is used for exciting a first high-frequency resonance mode to cover a second 5G frequency band, and the third branch 225 is used for exciting a second high-frequency resonance mode to cover a third 5G frequency band.

The electrical lengths of the first branch 223, the second branch 224 and the third branch 225 are from the feeding point 221 to the end of the branch, and in one embodiment, the electrical length of the first branch 223 is greater than that of the second branch 224, and the electrical length of the second branch 224 is greater than that of the third branch 225.

For example, the electrical length of the first branch 223 is 45.25mm, the electrical length of the second branch 224 is 18.15mm, and the electrical length of the third branch 225 is 8.05mm. The intrinsic mode of the first branch 223 is 1000MHz, and the frequency band N1 is adjusted by using the frequency multiplication, i.e. 2000MHz, excited by the intrinsic mode; the second branch 224 realizes an N41 eigenmode, and the coverage frequency is 2500-2690MHz; the third branch 225 realizes an N78 eigenmode, and the coverage frequency is 3.3-4GHz; the frequency band bandwidth of the three branches is covered by N1/N41/N78, and a 5G MIMO antenna frequency band is realized.

Specifically, in this embodiment, the first branch 223, the second branch 224, and the third branch 225 are located on the same plane, and the second branch 224 is parallel to and faces the third branch 225 in an opposite direction. The first branch 223 includes a first extending portion, a second extending portion, a third extending portion, a fourth extending portion and a fifth extending portion, which are connected in sequence, wherein the first extending portion and the third branch 225 are parallel and face the same direction, the second extending portion is perpendicular to the first extending portion, the third extending portion is perpendicular to the second extending portion and face the same direction as the second branch 224, the fourth extending portion is perpendicular to the third extending portion, and the fifth extending portion is perpendicular to the fourth extending portion and face the same direction as the third branch 225. In this embodiment, the resonant mode of the first antenna radiator 22 is an inverted F antenna resonant mode.

In an embodiment, the antenna assembly may further comprise a circuit board, the antenna assembly further comprises a circuit board, and the first radiator 22 may be a printed antenna printed on the circuit board.

In another embodiment, please refer to fig. 4, wherein the second branch 224 is parallel to the third branch 225 and is oriented in an opposite direction. The first branch 223 includes a first extension, a second extension, a third extension, a fourth extension and a fifth extension connected in sequence, the first extension is parallel to and faces the same as the second branch 224, the second extension is perpendicular to the first extension, the third extension is perpendicular to the second extension and faces the same as the third branch 225, the fourth extension is perpendicular to the third extension, and the fifth extension is perpendicular to the fourth extension and faces the same as the second branch 224.

In another embodiment, please refer to fig. 5, wherein the second branches 224 and the third branches 225 are parallel and oriented in the same direction. The first branch 223 includes a first extension portion, a second extension portion, and a third extension portion connected in sequence, the first extension portion is parallel to the second branch 224 and the third branch 225 and has the same orientation, the length of the first extension portion is greater than the second branch 224 and the third branch 225, the second extension portion is perpendicular to the first extension portion, and the third extension portion is perpendicular to the second extension portion and has an opposite orientation to the second branch 224 and the third branch 225.

In an embodiment, the antenna assembly may further include a fifth radiator 27, as shown in fig. 6, wherein the fifth radiator 27 is provided with a ground point and a feeding point, the ground point is used for connecting to the ground plane, the feeding point is used for connecting to a signal source, in this embodiment, the second radiator 23 is used for receiving and transmitting 5G radio frequency signals, and the first radiator 22 and the fifth radiator 27 are used for receiving 5G radio frequency signals.

An embodiment of the present invention further provides an electronic device, including a housing and an antenna assembly, where the antenna assembly is located inside the housing, and the antenna assembly includes:

a ground plane;

the signal source is used for accessing a radio frequency signal;

the first radiator comprises a grounding point and a feeding point, the grounding point is used for being connected with the grounding plane, the feeding point is used for being connected with the signal source, the first radiator further comprises a first branch knot, a second branch knot and a third branch knot, the first branch knot surrounds the second branch knot and the third branch knot through a bending structure, the first branch knot is used for exciting a low-frequency resonance mode, a first 5G frequency band is covered by frequency multiplication excited by the low-frequency resonance mode, the second branch knot is used for exciting a first high-frequency resonance mode to cover a second 5G frequency band, and the third branch knot is used for exciting a second high-frequency resonance mode to cover a third 5G frequency band.

In one embodiment, the housing includes a metal bezel and a bottom shell, the metal bezel forms a receiving space around the bottom shell, and the antenna assembly is disposed in the receiving space.

In an embodiment, the electronic device further includes a carrier plate 21, and the carrier plate 21 is connected to the metal frame and serves as a ground plane.

In an embodiment, the electronic device further includes a receiver 28, a battery 29 and a circuit board 30, the battery 29 and the circuit board 30 are both disposed on the carrier plate 21, the signal source is disposed on the circuit board 30, and the receiver 28 is disposed on the circuit board 30 and located on the top of the electronic device, as shown in fig. 6. In addition, it can be understood that, when the material of the frame includes a metal, for example, a metal such as a magnesium alloy, an aluminum alloy, etc., the metal frame may be used to form a system ground, which is a complete machine ground of the electronic device.

In this embodiment, the electronic Device may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or the like.

The antenna assembly 100 includes a ground plane, a first radiator, and a signal source, where the signal source is used to access a radio frequency signal, the first radiator includes a ground point and a feed point, the ground point is used to connect the ground plane, and the feed point is used to connect the signal source, the first radiator further includes a first branch, a second branch, and a third branch, the first branch surrounds the second branch and the third branch through a bent structure, where the first branch is used to excite a low-frequency resonance mode and cover a first 5G frequency band by a frequency multiplication excited by the low-frequency resonance mode, the second branch is used to excite a first high-frequency resonance mode to cover a second 5G frequency band, and the third branch is used to excite a second high-frequency resonance mode to cover a third 5G frequency band. The antenna module that this application embodiment provided can be in the signal of three different frequency channels of three minor matters radiation play through first radiation section, can effectively promote the antenna radiation performance of equipment.

The antenna assembly and the electronic device provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are described herein using specific examples, which are provided only to help understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An antenna assembly, comprising:

a ground plane;

the signal source is used for accessing a radio frequency signal;

the first radiator comprises a grounding point and a feeding point, the grounding point is used for being connected with the grounding plane, the feeding point is used for being connected with the signal source, the first radiator further comprises a first branch, a second branch and a third branch, the first branch surrounds the second branch and the third branch through a bent structure, and the tail end of the first branch surrounds the second branch and/or the third branch; the first branch knot, the second branch knot and the third branch knot are connected in parallel with the signal source;

the first branch is used for exciting a low-frequency intrinsic resonance mode, a first 5G frequency band is covered by frequency multiplication excited by the low-frequency intrinsic resonance mode, the second branch is used for exciting a first high-frequency resonance mode to cover a second 5G frequency band, the third branch is used for exciting a second high-frequency resonance mode to cover a third 5G frequency band, and the third 5G frequency band is different from the second 5G frequency band and is not frequency multiplication of the second 5G frequency band.

2. The antenna assembly of claim 1, wherein the first, second, and third branches are in a common plane, and wherein the second branch is parallel to and in an opposite orientation from the third branch.

3. The antenna assembly of claim 2, wherein the first stub comprises a first extension, a second extension, a third extension, a fourth extension, and a fifth extension connected in sequence, wherein the first extension is parallel to and facing the same as the third stub, the second extension is perpendicular to the first extension, the third extension is perpendicular to the second extension and facing the same as the second stub, the fourth extension is perpendicular to the third extension, and the fifth extension is perpendicular to the fourth extension and facing the same as the third stub.

4. The antenna assembly of claim 2, wherein the first leg has an electrical length greater than the second leg, and wherein the second leg has an electrical length greater than the third leg.

5. The antenna assembly of claim 4, wherein the electrical length of the first leg is 45.25mm, the electrical length of the second leg is 18.15mm, and the electrical length of the third leg is 8.05mm.

6. The antenna assembly of any one of claims 1-5, wherein the resonant mode of the first radiator is an inverted-F antenna resonant mode.

7. The antenna assembly according to any one of claims 1-5, characterized in that the antenna assembly further comprises a circuit board, and the first radiator is a printed antenna printed on the circuit board.

8. The antenna assembly of claim 1, further comprising: a second radiator;

the second radiator is provided with a grounding point and a feeding point, the grounding point is used for being connected with the grounding plane, the feeding point is used for being connected with a signal source, the second radiator is used for receiving and sending 5G radio frequency signals, and the first radiator is used for receiving the 5G radio frequency signals.

9. The antenna assembly of claim 1, further comprising: a third radiator and a fourth radiator;

the third radiator and the fourth radiator are respectively provided with a grounding point and a feeding point, the grounding points are used for being connected with the grounding plane, the feeding points are used for being connected with a signal source, the third radiator is used for receiving and sending 4G radio frequency signals, and the fourth radiator is used for receiving and sending WiFi radio frequency signals.

10. An electronic device comprising a housing and an antenna assembly, the antenna assembly located inside the housing, the antenna assembly comprising:

a ground plane;

the signal source is used for accessing a radio frequency signal;

the first radiator comprises a grounding point and a feeding point, the grounding point is used for being connected with the grounding plane, the feeding point is used for being connected with the signal source, the first radiator further comprises a first branch, a second branch and a third branch, the first branch surrounds the second branch and the third branch through a bent structure, the tail end of the first branch surrounds the second branch and/or the third branch, and the first branch, the second branch and the third branch are connected with the signal source in parallel; the first branch is used for exciting a low-frequency intrinsic resonance mode, and covers a first 5G frequency band by frequency multiplication excited by the low-frequency intrinsic resonance mode, the second branch is used for exciting a first high-frequency resonance mode to cover a second 5G frequency band, the third branch is used for exciting a second high-frequency resonance mode to cover a third 5G frequency band, and the third 5G frequency band is different from the second 5G frequency band and is not frequency multiplication of the second 5G frequency band.