Antenna assembly and electronic equipment

Abstract

The present application discloses an antenna assembly and an electronic device. In the antenna assembly, two low-frequency antennas are located on the same side of the electronic device, and their ground ends are arranged close to each other, while their free ends are far away from each other. Such an antenna assembly structure greatly reduces the ECC between LB antennas, thereby improving the channel capacity and increasing the data transmission speed.

Description

Technical Field

[0001] The present application relates to but is not limited to communication technology, and in particular to an antenna assembly and an electronic device. Background Art

[0002] With the increasing demand for communication and the rapid development of science and technology, 5G communication technology has received unprecedented attention and development. Under the demand for high-speed data transmission, multiple input multiple output (MIMO) technology has received more and more attention, and MIMO wireless communication technology has become an important research topic in the field of communication. Its core idea is to use multiple antennas at the transmitter and multiple antennas to receive signals at the same time on the basis of traditional communication systems, making full use of multipath propagation of wireless channels, and relying on increased spatial freedom to improve signal transmission rate, reception quality and spectrum utilization, and under the condition of a certain bandwidth, the transmission rate can be increased exponentially.

[0003] Generally, the lower the frequency, the larger the envelope correlation coefficient (ECC). Therefore, how to reduce the ECC between low frequency band (LB) antennas is an urgent problem to be solved. Summary of the invention

[0004] The present application provides an antenna assembly and an electronic device, which can reduce the ECC between LB antennas, improve channel capacity, and increase data transmission speed.

[0005] An embodiment of the present application provides an antenna assembly, characterized in that it is applied to an electronic device, comprising: a first low-frequency antenna for supporting a first frequency band and a second low-frequency antenna for supporting a second frequency band, wherein part or all of the first low-frequency antenna and part or all of the second low-frequency antenna are located on the same side of the electronic device; wherein:

[0006] The first low-frequency antenna comprises a first radiator and a first signal source, the first radiator has a first ground end and a first free end, the first ground end is grounded, and the first signal source is electrically connected between the first ground end and the first free end;

[0007] The second low-frequency antenna comprises a second radiator and a second signal source, the second radiator has a second ground end and a second free end, the second ground end is grounded, and the second signal source is electrically connected between the second ground end and the second free end;

[0008] The first ground end is an end of the first radiator close to the second radiator, the second ground end is an end of the second radiator close to the first radiator, the first free end is an end of the first radiator away from the second radiator, and the second free end is an end of the second radiator away from the first radiator.

[0009] The antenna assembly provided in the embodiment of the present application includes two low-frequency antennas located on the same side of the electronic device, with their ground ends arranged close to each other and their free ends far away from each other. Such an antenna assembly structure greatly reduces the ECC between LB antennas, thereby improving the channel capacity and increasing the data transmission speed.

[0010] An embodiment of the present application also provides an electronic device, comprising any of the antenna assemblies described above.

[0011] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0013] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0014] Figure 2 for Figure 1 A schematic diagram of the structure of an electronic device is provided;

[0015] Figure 3 This is a schematic diagram of the composition structure of the first embodiment of the antenna assembly in the embodiments of the present application;

[0016] Figure 4 This is a schematic diagram of the structure of the second embodiment of the antenna assembly in the embodiments of the present application;

[0017] Figure 5 It is a schematic diagram of the composition structure of the third embodiment of the antenna assembly in the embodiments of the present application;

[0018] Figure 6 A schematic diagram of frequency response curves of a first low-frequency antenna and a second low-frequency antenna of an antenna assembly in a third embodiment of the present application;

[0019] Figure 7A schematic diagram of an ECC curve between the first low-frequency antenna and the second low-frequency antenna of the antenna assembly in the third embodiment of the present application;

[0020] Figure 8 It is a schematic diagram of the composition structure of a fourth embodiment of the antenna assembly in the embodiments of the present application;

[0021] Fig. 9 It is a schematic diagram of the composition structure of the fifth embodiment of the antenna assembly in the embodiments of the present application;

[0022] Fig.10 It is a schematic diagram of the structure of a sixth embodiment of the antenna assembly in the embodiments of the present application;

[0023] Fig.11 It is a schematic diagram of the composition structure of the seventh embodiment of the antenna assembly in the embodiments of the present application;

[0024] Fig.12 It is a schematic diagram of frequency response curves of four low-frequency antennas of the antenna assembly in the sixth embodiment of the present application;

[0025] Fig.13 Schematic diagram of the ECC curve between the four low-frequency antennas of the antenna assembly in the sixth embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0027] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0029] It is understood that the terms "first" and "second" used in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0031] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0032] Figure 1 A schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application. The electronic device 1000 can be a device capable of transmitting and receiving electromagnetic wave signals, such as a telephone, a television, a tablet computer, a mobile phone, a camera, a personal computer, a laptop computer, a vehicle-mounted device, a headset, a watch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (CPE, Customer Premise Equipment). Taking the electronic device 1000 as a mobile phone as an example, for the convenience of description, the electronic device 1000 is defined as a first viewing angle as a reference, the width direction of the electronic device 1000 is defined as the X direction, the length direction of the electronic device 1000 is defined as the Y direction, and the thickness direction of the electronic device 1000 is defined as the Z direction. The direction indicated by the arrow is the positive direction. The electronic device 1000 includes a first side 401 and a second side 402 arranged opposite to each other, and a third side 403 and a fourth side 404 connected between the first side 401 and the second side 402. The first side 401 and the third side 403 are a pair of short sides in the X direction, and the second side 402 and the fourth side 404 are a pair of long sides in the Y direction. Figure 1 The electronic device 1000 is described as a rectangle for example. In other implementations, the electronic device 1000 may also be a trapezoid, a diamond, or other shapes.

[0033] Figure 2 for Figure 1Provided electronic equipment exploded schematic diagram, combined with Figure 1 , Figure 2 As shown, the electronic device 1000 provided in the embodiment of the present application includes a display screen 300 and a shell 500 covering the display screen 300. The shell 500 includes a middle frame 501 and a back cover 502 covering each other. The back cover 502 is located on the side of the middle frame 501 away from the display screen 300. The middle frame 501 includes a middle plate and a frame surrounding the side of the middle plate. The middle plate is used to install electronic components such as a main board 200 and a battery 400. The edge of the display screen 300, the frame and the back cover 502 are connected in sequence. Among them, the frame and the back cover 502 can be integrally formed. The electronic device 1000 also includes an antenna assembly 600. At least a portion of the antenna assembly 600 is arranged on the main board 200 of the electronic device 1000 or is electrically connected to the main board 200 of the electronic device 1000. The antenna assembly 100 is used to send and receive radio frequency signals to realize the communication function of the electronic device 1000. It should be noted that, Figure 2 The setting position of the antenna assembly 100 in the figure is merely an illustrative example and is not used to limit the setting position of the antenna assembly of the present application, nor is it used to limit the protection scope of the present application.

[0034] Generally, the low-frequency main set (PRX) antenna and the diversity (DRX) antenna are distributed on different sides of the electronic device 1000. When more LB antennas are added, it is inevitable that the newly added LB antenna and the low-frequency PRX antenna or DRX antenna are distributed on the same side, and the ECC between the LB antennas on the same side will increase, resulting in poor channel capacity and reduced data transmission speed.

[0035] In order to reduce the ECC between LB antennas, combined Figure 1 , Figure 2 , an embodiment of the present application provides an antenna assembly, which is applied to an electronic device 1000, such as Figure 3 As shown, it at least includes: a first low-frequency antenna 10 for supporting a first frequency band and a second low-frequency antenna 20 for supporting a second frequency band, and part or all of the first low-frequency antenna 10 and part or all of the second low-frequency antenna 20 are located on the same side of the electronic device 1000;

[0036] The first low-frequency antenna 10 includes a first radiator 100 and a first signal source S1. The first radiator 100 has a first ground terminal 1012 and a first free terminal 1011. The first ground terminal 1012 is grounded. The first signal source S1 is electrically connected between the first ground terminal 1012 and the first free terminal 1011 of the first radiator 100.

[0037] The second low-frequency antenna 20 includes a second radiator 200 and a second signal source S2. The second radiator 200 has a second ground terminal 2012 and a second free terminal 2011. The second ground terminal 2012 is grounded. The second signal source S2 is electrically connected between the second ground terminal 2012 and the second free terminal 2011 of the second radiator 200.

[0038] The first grounding end 1012 is an end of the first radiator 100 close to the second radiator 200, the second grounding end 2012 is an end of the second radiator 200 close to the first radiator 100, the first free end 1011 is an end of the first radiator 100 away from the second radiator 200, and the second free end 2011 is an end of the second radiator 200 away from the first radiator 100.

[0039] In one embodiment, if Figure 3 As shown, in this embodiment, the first low-frequency antenna 10 and the second low-frequency antenna 20 are located on the same side of the electronic device 1000. Figure 3 In one embodiment, as Figure 4 As shown, in this embodiment, part of the second low-frequency antenna 20 and the first low-frequency antenna 10 are located on the same side of the electronic device 1000, that is, part of the second low-frequency antenna 20 is located on the third side 403, and the other part is located on the same side of the electronic device 1000 as the first low-frequency antenna 10. Figure 4 The fourth side 404 in the embodiment. It should be noted that the above are only some examples of the positional relationship between the two low-frequency antennas, and are not used to limit the positional relationship between the two low-frequency antennas, nor are they used to limit the protection scope of the present application.

[0040] In an exemplary embodiment, the first ground terminal 1012 of the first radiator 100 and the second ground terminal 2012 of the second radiator 200 may share a common ground, such as Figure 5 As shown, the first ground terminal 1012 and the second ground terminal 2012 are combined into a common ground.

[0041] In an exemplary embodiment, the first signal source S1 can be electrically connected to any position between the first ground terminal 1012 and the first free end 1011 of the first radiator 100, for example: it can be a capacitive high-impedance feed source close to the first free end 1011, it can also be a low-impedance feed source close to the first ground terminal 1012, or it can be any position between the first ground terminal 1012 and the first free end 1011.

[0042] In an exemplary embodiment, the second signal source S2 can be electrically connected to any position between the second ground terminal 2012 and the second free end 2011 of the second radiator 200, for example: it can be a capacitive high-impedance feed source close to the second free end 2011, or it can be a low-impedance feed source close to the second ground terminal 2012, or it can be any position between the second ground terminal 2012 and the second free end 2011.

[0043] In an exemplary embodiment, the first frequency band and the second frequency band may be the same or different. In an embodiment, the first frequency band may be a 4G low frequency band or a 5G low frequency band; the second frequency band may be a 4G low frequency band or a 5G low frequency band.

[0044] Figure 6 FIG. 1 is a schematic diagram of frequency response curves of the first low-frequency antenna and the second low-frequency antenna of the antenna assembly in the third embodiment of the present application. Figure 6 As shown, the horizontal axis represents frequency (in GHz), and the vertical axis represents return loss characteristics (in dB). In this embodiment, taking the first frequency band and the second frequency band as the N28 frequency band as an example, curve 61 is the reflection coefficient curve of the first low-frequency antenna 10, curve 62 is the reflection coefficient curve of the second low-frequency antenna 20, and curve 63 is the isolation curve between the first low-frequency antenna 10 and the second low-frequency antenna 20. Figure 6 It can be seen that the isolation between the first low-frequency antenna 10 and the second low-frequency antenna 20 is less than -13dB, that is, the first low-frequency antenna 10 and the second low-frequency antenna 20 of the antenna assembly provided by the embodiment of the present application have excellent spatial correlation. Figure 7 As shown, the horizontal axis represents frequency (unit: GHz), the vertical axis represents ECC, and curve 72 is a schematic diagram of the ECC curve between the first low-frequency antenna and the second low-frequency antenna of the antenna assembly in the third embodiment of the present application. Curve 71 is the ECC between the two low-frequency antennas in the related art. In the related art, the ECC between the two low-frequency antennas corresponding to the N28 frequency band is greater than 0.7. Compared with the related art, in the antenna assembly provided in the embodiment of the present application, the ECC between the first low-frequency antenna 10 and the second low-frequency antenna 20 corresponding to the entire LB frequency band is less than 0.2, which is far better than the related art. The ECC between the LB antennas is improved by more than 350%. In other words, the antenna assembly provided in the embodiment of the present application greatly reduces the ECC between the LB antennas, thereby improving the channel capacity and increasing the data transmission speed.

[0045] The antenna assembly provided in the embodiment of the present application includes two low-frequency antennas located on the same side of the electronic device, with their ground ends arranged close to each other and their free ends far away from each other. Such an antenna assembly structure greatly reduces the ECC between LB antennas, thereby improving the channel capacity and increasing the data transmission speed.

[0046] For low-frequency antennas, due to their low frequency and long wavelength, they need to occupy a large amount of radiation space in electronic devices. As electronic devices such as mobile phones are gradually becoming thinner and lighter, it is difficult to design multiple low-frequency antennas in electronic devices. Therefore, a dual low-frequency antenna design is usually adopted, but the dual low-frequency antenna cannot cover different handheld scenarios of the human body. Moreover, in the non-standalone networking (NSA, Non-StandAlone) scenario, when performing a low-frequency + low-frequency dual connection (EN-DC, EUTRA-NR DualConnection) combination, for LTE and NR, only one antenna performance meets the requirements, which is equivalent to LTE and NR degenerating into a single antenna design, which will inevitably lead to a decrease in the reception performance under NSA. Therefore, if Figure 8 As shown, the antenna assembly provided by the embodiment of the present application may also include: a third low-frequency antenna 30 for supporting a third frequency band and a fourth low-frequency antenna 40 for supporting a fourth frequency band, and part or all of the third low-frequency antenna 30 and part or all of the fourth low-frequency antenna 20 are located on the other same side of the electronic device 1000;

[0047] The third low-frequency antenna 30 includes a third radiator 300 and a third signal source S3. The third radiator 300 has a third ground terminal 3012 and a third free end 3011. The third ground terminal 3012 is grounded. The third signal source S3 is electrically connected between the third ground terminal 3012 and the third free end 3011 of the third radiator 300.

[0048] The fourth low-frequency antenna 40 includes a fourth radiator 400 and a fourth signal source S4. The fourth radiator 400 has a fourth ground terminal 4012 and a fourth free end 4011. The fourth ground terminal 4012 is grounded. The fourth signal source S4 is electrically connected between the fourth ground terminal 4012 and the fourth free end 4011 of the fourth radiator 400.

[0049] The third grounding end 3012 is an end of the third radiator 300 close to the fourth radiator 400, the fourth grounding end 4012 is an end of the fourth radiator 400 close to the third radiator 300, the third free end 3011 is an end of the third radiator 300 away from the fourth radiator 400, and the fourth free end 4011 is an end of the fourth radiator 400 away from the third radiator 300.

[0050] In one embodiment, if Figure 8 As shown, in this embodiment, the first low-frequency antenna 10 and the second low-frequency antenna 20 are located on the same side of the electronic device 1000. Figure 3 The third low frequency antenna 30 and the fourth low frequency antenna 40 are located on the same side of the electronic device 1000. Figure 8That is, in this embodiment, the first low frequency antenna 10 and the second low frequency antenna 20 are arranged on different sides of the electronic device 1000 from the third low frequency antenna 30 and the fourth low frequency antenna 40.

[0051] In one embodiment, if Fig. 9 As shown, in this embodiment, part of the second low-frequency antenna 20 and the first low-frequency antenna 10 are located on the same side of the electronic device 1000, that is, part of the second low-frequency antenna 20 is located on the third side 403, and the other part is located on the same side of the electronic device 1000 as the first low-frequency antenna 10. Fig. 9 The fourth side 404; part of the fourth low-frequency antenna 40 and the third low-frequency antenna 30 are located on the same side of the electronic device 1000, that is, part of the fourth low-frequency antenna 40 is located on the third side 403, and the other part is located on the same side of the electronic device 1000 as the third low-frequency antenna 30; Fig. 9 That is to say, in this embodiment, the first low-frequency antenna 10 and the second low-frequency antenna 20, and the third low-frequency antenna 30 and the fourth low-frequency antenna 40 are partially located on the same side of the electronic device 1000. It should be noted that these are only some examples of the positional relationship of the four low-frequency antennas, and are not used to limit the positional relationship of the two low-frequency antennas, nor are they used to limit the protection scope of this application.

[0052] In an exemplary embodiment, the third ground terminal 3012 of the third radiator 300 and the fourth ground terminal 4012 of the fourth radiator 400 may share a common ground, such as Fig.10 As shown, the third ground terminal 3012 and the fourth ground terminal 4012 are combined into a common ground. Fig.11 As shown, the positions of the first low frequency antenna 10 and the second low frequency antenna 20 and the third low frequency antenna 30 and the fourth low frequency antenna 40 on both sides of the electronic device can be staggered up and down.

[0053] In an exemplary instance, the third signal source S3 can be electrically connected to any position between the third ground terminal 3012 and the third free end 3011 of the third radiator 300, for example: it can be a capacitive high-impedance feed source close to the third free end 3011, or it can be a low-impedance feed source close to the third ground terminal 3012, or it can be any position between the third ground terminal 3012 and the third free end 3011.

[0054] In an exemplary instance, the fourth signal source S4 can be electrically connected to any position between the fourth ground terminal 4012 and the fourth free end 4011 of the fourth radiator 400, for example: it can be a capacitive high-impedance feed source close to the fourth free end 4011, or it can be a low-impedance feed source close to the fourth ground terminal 4012, or it can be any position between the fourth ground terminal 4012 and the fourth free end 4011.

[0055] In an exemplary embodiment, the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band may be the same, or different, or partly the same and partly different. In an embodiment, each frequency band may be a 4G low frequency band or a 5G low frequency band. In an embodiment, the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band are N28 frequency bands or N71 frequency bands.

[0056] Fig.12 FIG. 1 is a schematic diagram of frequency response curves of four low-frequency antennas of the antenna assembly in the sixth embodiment of the present application. Fig.12 As shown, the abscissa represents frequency (in GHz), and the ordinate represents return loss characteristics (in dB). In this embodiment, taking the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band as N28 frequency bands as an example, curves 121 to 123 are reflection coefficient curves of the first low-frequency antenna 10, the second low-frequency antenna 20, the third low-frequency antenna 30, and the fourth low-frequency antenna 40. The four curves are basically overlapped, and the dotted line curve represents the isolation curve between the four low-frequency antennas. Fig.12 It can be seen that the isolation between the four low-frequency antennas is less than -13dB, that is, the four low-frequency antennas of the antenna assembly provided in the embodiment of the present application have excellent spatial correlation. Fig.13 As shown, the horizontal axis represents frequency (unit: GHz), and the vertical axis represents ECC. Fig.10 In the sixth embodiment shown, the two groups of low-frequency antennas are symmetrical. Fig.13 It can be seen that the ECC between the four low-frequency antennas in the antenna assembly provided in the embodiment of the present application is less than 0.5 throughout the entire low-frequency band. Fig.13 ANT1 in Fig.10 The first low frequency antenna 10, Fig.13 ANT2 in Fig.10 The third low frequency antenna 30, Fig.13 ANT3 in Fig.10 The second low frequency antenna 20, Fig.13 ANT4 in Fig.10 The fourth low frequency antenna 40 in.

[0057] MIMO systems rely on the independence between received signals to achieve spatial diversity. A lower envelope correlation coefficient (ECC) reflects the low correlation between signals. The lower the ECC, the better the channel capacity and the faster the data transmission speed. The antenna assembly including four low-frequency antennas provided in the embodiment of the present application is an ultra-low ECC four-low-frequency antenna system, which greatly reduces the ECC between LB antennas, reduces the ECC of MIMO antennas, and improves the throughput of the MIMO system, thereby improving the channel capacity and increasing the data transmission speed.

[0058] An embodiment of the present application also provides an electronic device, which may at least include the antenna assembly provided by any embodiment of the present application.

[0059] Although the embodiments disclosed in this application are as above, the contents described are only embodiments adopted to facilitate understanding of this application and are not intended to limit this application. Any technician in the field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be based on the scope defined in the attached claims.

Claims

1. An antenna assembly, characterized in that: Applied to electronic equipment, comprising: a first low-frequency antenna for supporting a first frequency band and a second low-frequency antenna for supporting a second frequency band, wherein part or all of the first low-frequency antenna and part or all of the second low-frequency antenna are located on the same side of the electronic equipment; wherein, The first low-frequency antenna comprises a first radiator and a first signal source, the first radiator has a first ground end and a first free end, the first ground end is grounded, and the first signal source is electrically connected between the first ground end and the first free end; the first signal source is a capacitive high-impedance feed source close to the first free end, or a low-impedance feed source close to the first ground end; The second low-frequency antenna comprises a second radiator and a second signal source, the second radiator has a second ground end and a second free end, the second ground end is grounded, and the second signal source is electrically connected between the second ground end and the second free end; the second signal source is a capacitive high-impedance feed source close to the second free end, or a low-impedance feed source close to the second ground end; The first ground end is an end of the first radiator close to the second radiator, the second ground end is an end of the second radiator close to the first radiator, the first free end is an end of the first radiator away from the second radiator, and the second free end is an end of the second radiator away from the first radiator; Also included: a third low-frequency antenna for supporting a third frequency band and a fourth low-frequency antenna for supporting a fourth frequency band, wherein part or all of the third low-frequency antenna and part or all of the fourth low-frequency antenna are located on the other side of the electronic device; The third low-frequency antenna comprises a third radiator and a third signal source, wherein the third radiator has a third ground terminal and a third free terminal, the third ground terminal is grounded, and the third signal source is electrically connected between the third ground terminal and the third free terminal; the third signal source is a capacitive high-impedance feed source close to the third free terminal, or a low-impedance feed source close to the third ground terminal; The fourth low-frequency antenna comprises a fourth radiator and a fourth signal source, the fourth radiator has a fourth ground terminal and a fourth free end, the fourth ground terminal is grounded, and the fourth signal source is electrically connected between the fourth ground terminal and the fourth free end; the fourth signal source is a capacitive high-impedance feed source close to the fourth free end, or a low-impedance feed source close to the fourth ground terminal; The third grounding end is an end of the third radiator close to the fourth radiator, the fourth grounding end is an end of the fourth radiator close to the third radiator, the third free end is an end of the third radiator away from the fourth radiator, and the fourth free end is an end of the fourth radiator away from the third radiator.

2. The antenna assembly according to claim 1, wherein: The first ground terminal and the second ground terminal share a common ground.

3. The antenna assembly according to claim 1, wherein: The first frequency band and the second frequency band are the same or different.

4. The antenna assembly according to claim 1, wherein: The first frequency band and the second frequency band are a 4G low frequency band or a 5G low frequency band.

5. The antenna assembly according to claim 1, wherein: The first low frequency antenna and the second low frequency antenna located on the same side and the third low frequency antenna and the fourth low frequency antenna located on the other side are arranged on both sides of the electronic device in an up-down staggered manner.

6. The antenna assembly according to claim 1 or 5, wherein: The third ground terminal and the fourth ground terminal share a common ground.

7. The antenna assembly according to claim 1 or 5, wherein: The first frequency band, the second frequency band, the third frequency band and the fourth frequency band are the same, or different, or partially the same and partially different.

8. The antenna assembly according to claim 1 or 5, wherein: Any one or any combination of the first frequency band, the second frequency band, the third frequency band and the fourth frequency band is a 4G low frequency band or a 5G low frequency band.

9. The antenna assembly according to claim 1, wherein: The first frequency band, the second frequency band, the third frequency band and the fourth frequency band are N28 frequency band or N71 frequency band.

10. An electronic device, characterized in that: The invention comprises the antenna assembly as claimed in any one of claims 1 to 9.

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