CN210092344U

CN210092344U - Antenna assembly and electronic equipment

Info

Publication number: CN210092344U
Application number: CN201921006459.7U
Authority: CN
Inventors: 姚坤
Original assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Current assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2020-02-18
Anticipated expiration: 2029-06-29

Abstract

The application discloses antenna module and electronic equipment, antenna module are applied to electronic equipment, and electronic equipment includes the casing, and this antenna module includes: the first circuit board is provided with a first radiator and a second radiator; the first circuit board is arranged on the inner side of the shell; the first radiator comprises a first segment, a second segment and a first feeder line, the first feeder line comprises a first end and a second end, and one end of the first segment, one end of the second segment and the second end of the first feeder line are connected with each other; the second circuit board is arranged in the shell and comprises a feed source and a second feeder line, and the feed source is connected with the first end of the first feeder line through the second feeder line; the second radiator and the first radiator are arranged at intervals, and a gap is formed between the second radiator and the tail end of the second section. The application provides an antenna module and electronic equipment can not only realize better antenna radiation performance, can reduce the specific absorption rate moreover, reduces the radiation influence that causes the human body.

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 continuous development of screen technologies, the screen occupation ratio of a mobile phone is larger and larger in the future, and the antenna clearance is smaller and smaller, so that the antenna debugging space is compressed to a great extent, and the debugging of the mobile phone antenna faces huge challenges. In order to provide better radiation performance for users, the antenna is generally arranged on the top of the mobile phone or on the front shell of the screen side, but this often results in higher Specific Absorption Rate (SAR), which has a bad influence on the human body.

SUMMERY OF THE UTILITY MODEL

The application provides an antenna assembly and an electronic device, so as to overcome the defects.

In a first aspect, an embodiment of the present application provides an antenna assembly applied to an electronic device, where the electronic device includes a housing, and the antenna assembly includes: the circuit comprises a first circuit board and a second circuit board, wherein the first circuit board is provided with a first radiator and a second radiator; the first circuit board is arranged on the inner side of the shell; the first radiator comprises a first segment, a second segment and a first feed line, the first feed line comprises a first end and a second end, and one end of the first segment, one end of the second segment and the second end of the first feed line are connected with each other; the second circuit board is arranged inside the shell and comprises a feed source and a second feed line, and the feed source is connected with the first end of the first feed line through the second feed line; the second radiator and the first radiator are arranged at intervals, and a gap is formed between the second radiator and the tail end of the second segment.

Further, the first segment is longer than the second segment.

Furthermore, the antenna assembly further comprises a metal elastic sheet, and the first end of the first feeder line is connected with the second end of the second feeder line through the metal elastic sheet.

Further, the ground terminal of the first radiator is connected to the reference ground terminal of the second circuit board.

Further, the antenna assembly further includes a frequency modulation device, the frequency modulation device is connected to the first radiator, and the frequency modulation device is configured to set a frequency band of a signal radiated by the first radiator.

Furthermore, the frequency modulation device comprises a switch module and a plurality of matching modules, wherein the electrical parameters of each matching module are different, and each electrical parameter corresponds to one frequency band; the switch module comprises a plurality of input contacts and at least one output contact, each input contact is connected with one matching module, and the output contact is connected with the first radiator.

Further, the matching modules include inductors, and the inductance value of the inductor of each matching module is different. In a second aspect, an embodiment of the present application further provides an electronic device, including: a housing and an antenna assembly as described above in relation to the first aspect.

Further, the first circuit board is arranged on the inner side of the top of the shell.

Further, the second radiator includes a third segment, and the third segment is disposed on the bending portion of the top of the housing.

For prior art, the scheme that this application provided, the line is walked in first circuit board and second circuit board simultaneously to the antenna module, specifically, is applied to electronic equipment, and electronic equipment includes the casing, and the antenna module includes: the first circuit board is provided with a first radiator and a second radiator; the first circuit board is arranged on the inner side of the shell; the first radiator comprises a first segment, a second segment and a first feeder line, the first feeder line comprises a first end and a second end, and one end of the first segment, one end of the second segment and the second end of the first feeder line are connected with each other; the second circuit board is arranged in the shell and comprises a feed source and a second feeder line, and the feed source is connected with the first end of the first feeder line through the second feeder line; the second radiator and the first radiator are arranged at intervals, and a gap is formed between the second radiator and the tail end of the second section. Therefore, through walk the line simultaneously on first circuit board and second circuit board, the requirement of walking the line on the first circuit board that is located the casing inboard has been reduced on the one hand, and make the width and the length of walking the line on the second circuit board easily adjust, thereby can conveniently debug antenna radiation performance, on the other hand can adjust the distance of antenna and main ground through walking the line on the second circuit board, make the distance closer, not only can strengthen with the ground wire coupling, realize better backward flow, and can be apart from the screen, metal particle is more close, reduce the specific absorption rate, and then can not only realize better antenna radiation performance, but also can reduce the radiation influence to the human body.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of an antenna assembly provided by an embodiment of the present application;

FIG. 2 shows an enlarged partial view of region A of the antenna assembly shown in FIG. 1;

fig. 3 is a schematic structural diagram illustrating a trace in the antenna assembly shown in fig. 1;

figure 4 shows a schematic circuit diagram of the frequency modulation means of the antenna assembly of figure 3;

fig. 5 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, 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.

With the continuous development of screen technologies, the screen occupation ratio is larger and larger, so that the antenna clearance is smaller and smaller, the antenna debugging space is compressed to a great extent, and the debugging of the mobile phone antenna faces huge challenges. At present, in order to provide better antenna radiation performance for users, engineers can walk the antenna to the front shell on the top or one side of the screen, but the better antenna radiation performance will bring higher Specific Absorption Rate (SAR) and cause larger radiation influence on human body.

And with the development of 5G technology, the number of subsequent antennas will be more and more, and the selectable place of the antenna trace will be more and more limited under the limited structural space. Meanwhile, with the continuous development of society, people pay more and more attention to adverse effects brought by radiation, and the requirement on the SAR value is higher and higher.

Therefore, in order to overcome the above defects, the present application provides a new antenna assembly and an electronic device, so as to achieve a better antenna radiation performance, and also achieve a lower SAR value, and reduce adverse effects of radiation on a human body.

Referring to fig. 1, an antenna assembly 100 provided in the present embodiment is shown, which is applied to an electronic device, including but not limited to a mobile phone, a tablet computer, a notebook computer, a wearable device (such as a smart band, a smart watch, a pedometer, etc.), or other terminal devices capable of being provided with an antenna. In this embodiment, the electronic device is described by taking a mobile phone as an example. Wherein, electronic equipment includes the casing.

The antenna assembly includes: the first circuit board is provided with a first radiator and a second radiator; the first circuit board is arranged on the inner side of the shell; the first radiator comprises a first segment, a second segment and a first feeder line, the first feeder line comprises a first end and a second end, and one end of the first segment, one end of the second segment and the second end of the first feeder line are connected with each other; the second circuit board is arranged in the shell and comprises a feed source and a second feeder line, and the feed source is connected with the first end of the first feeder line through the second feeder line; the second radiator and the first radiator are arranged at intervals, and a gap is formed between the second radiator and the tail end of the second segment.

Please refer to fig. 1 and fig. 2, wherein fig. 2 is an enlarged schematic view of a region a of the antenna element shown in fig. 1.

As shown in fig. 1, the antenna assembly 100 is applied to an electronic device, and the electronic device includes a housing, where the housing includes a body and a frame surrounding the body, the body is substantially rectangular plate-shaped, and the frame surrounds the periphery of the body. In some embodiments, the bezel is also bent with respect to the body. The body forms accommodating space in the frame jointly, and accommodating space is used for holding circuit board and other electronic device, such as receiver, camera module, audio interface, battery etc. of electronic equipment. The circuit board can be provided with a radio frequency transceiver circuit and other functional devices. Wherein, the shell is a nonmetal shell, such as a plastic shell and a ceramic shell. In some embodiments, the housing may further include a plastic portion and a metal portion, and may also be a housing structure in which metal and plastic are mated.

In the present embodiment, the antenna assembly 100 includes the first circuit board 20 and the second circuit board 30, the first circuit board 20 being disposed inside the housing, and the second circuit board 30 being disposed inside the housing.

The first Circuit board 20 is a Flexible Printed Circuit (FPC). In one embodiment, the first circuit board 20 is disposed on the inner side of the top of the housing, and is bent at the housing bending portion to be elastically deformed. Compared with the traditional method of arranging the circuit board on the inner side of the side wall of the shell of the electronic device, because the top of the shell is farther from the human body than the side wall of the shell in the antenna radiation process, for example, when a user answers a call, the side wall of the shell is closer to the human body, and the top of the shell is farther from the human body. Therefore, the first circuit board 20 is disposed on the inner side of the top of the housing, so that the SAR value is reduced and the adverse effect of the antenna radiation on the human body is reduced compared to the conventional circuit board disposed on the side wall of the housing of the electronic device.

In another embodiment, the housing may further include a plastic support, which may be integrally formed with the housing, or may be separately formed, and then fixedly disposed inside the housing in a screwing or adhering manner, and the first circuit board 20 is disposed on one side of the plastic support close to the housing, as a manner, the first circuit board 20 may be adhered to the plastic support by an adhesive or a glue, and inwardly bent at the bending portion, and then adhered to the plastic support.

The second circuit board 30 is a Printed Circuit Board (PCB). In one embodiment, the second circuit board 30 is a motherboard of an electronic device. The second circuit board 30 is disposed inside the housing and near the top of the housing.

Referring to fig. 3, the antenna assembly 100 includes a first radiator 21 and a second radiator 22, the first radiator 21 includes a first segment 211, a second segment 212, and a first feed line 213, and the first feed line 213 includes a first end 2131 and a second end 2132. Wherein one end of the first segment 211, one end of the second segment 212, and the second end 2132 of the first feed line 213 are connected to each other.

The second circuit board 30 comprises a feed 215 and a second feed 214, the feed 215 is connected to the first end 2131 of the first feed 213 via the second feed 214, and the feed 215 feeds current to the first segment 2131 of the first feed 213 via the second feed 214, such that the first segment 211 and the second segment 212 radiate the first signal and the second signal, respectively. The second radiator 22 is spaced apart from the first radiator 20, the second radiator 22 forms a gap with an end of the second segment 212, and the second segment 212 couples an electrical signal to the second radiator 22 through the gap. In other words, the third segment 221 is a parasitic segment, and the second segment 212 generates a secondary radiation by a coupling effect, thereby forming a resonance and radiating the third signal outwards.

Specifically, the feed 215 feeds an electrical signal to the first end 2141 of the second feed line 214, and the second end 2142 of the second feed line 214 feeds an electrical signal to the first feed line 213, so that the first segment 211, the second segment 212 and the third segment 221 are brought into resonance and radiate the signal outwards. Since the routing process on the second circuit board 30 is simpler than that on the first circuit board 20, the tuning of the antenna can be conveniently realized by changing the equivalent electrical length of the width and/or length of the second feed line 214 on the second circuit board 30, for example, the wider the routing, the higher the antenna efficiency and the better the radiation performance, thereby facilitating the debugging on the second feed line 214 on the second circuit board 30 to obtain the better radiation performance of the antenna. Therefore, by arranging part of the routing wires of the antenna assembly 100, i.e., the second feeder line 214, on the second circuit board 30, the debugging difficulty can be reduced, and better antenna radiation performance can be realized conveniently. Moreover, part of the routing wires are disposed on the second circuit board 30, and the SAR value of the antenna assembly 100 can be adjusted by adjusting the distance between the antenna assembly 100 and the main ground, for example, the distance between the second feeder line 214 and the main ground is reduced, so that the signal can flow back better, and further the SAR value is reduced, thereby reducing the influence of radiation on the human body.

In addition, in an embodiment, the first circuit board 20 is disposed on the inner side of the top of the casing, and the adhesive is attached to the inner side of the top of the casing, because the space inside the top of the casing is small, and many electronic devices are provided with the lifting camera module, the area of the inner side of the top of the casing, which can be wired, is reduced, the wiring space is limited, and great challenges are created to the wiring and debugging of the antenna on the first circuit board 20, and therefore, the requirement for the wiring of the circuit board on the casing can be reduced by disposing part of the wiring, such as the second feeder line 214, on the second circuit board 30.

In some embodiments, the signals radiated by the first segment 211, the second segment 212, and the third segment 221 may cover the same frequency band, or may cover different frequency bands, and the specific frequency band covered is not specifically limited. Since the length of different segments is inversely proportional to the wavelength corresponding to the frequency band covered by the segment, i.e. the longer the segment length, the lower the frequency band corresponding to the signal radiated by the segment. Therefore, by adjusting the length dimensions of the first segment 211, the second segment 212 and the third segment 221, the first segment 211, the second segment 212 and the third segment 221 can respectively work in different frequency bands of low, medium and high without changing positions, i.e. low, medium and high frequency signals can be respectively radiated.

Specifically, in one embodiment, the first segment 211 is longer than the second segment 212, and the feed 215 feeds current into the first end 2131, such that a first signal radiated by the first segment 211 covers a low frequency band, i.e., radiates a low frequency signal, and a second signal radiated by the second segment 212 covers a medium frequency band, i.e., radiates a medium frequency signal. The end of the second segment 212 feeds an electrical signal to the second radiator 22 through a gap with the second radiator 22. The second radiator 22 includes a third segment 221, the third segment 221 is disposed on the bending portion of the top of the housing, a gap is formed between one end of the third segment 221 and the end of the second segment 212, so that the second segment 212 couples the electrical signal to the third segment 221 through the gap, and the third segment 221 radiates the high-frequency signal, thereby expanding the radiation and receiving directions of the wireless signal and effectively improving the antenna performance. One end of the third segment 221 is further grounded through a ground line, and as a mode, the third segment 221 is connected to the main ground through a ground hole formed in the first circuit board 20 to realize grounding. Therefore, by setting three segments of resonance in different frequency bands, the antenna assembly 100 can work in three different frequency bands, and the communication performance of the electronic device using the antenna assembly 100 is improved.

In the present embodiment, the first segment 211, the second segment 212, and the third segment 213 cover different preset frequency bands, so that the antenna assembly 100 transmits and receives Long Term Evolution (LTE) signals. The LTE signal is an LTE signal transmitted based on UMTS (Universal Mobile Telecommunications System) technical standard established by 3GPP (The 3rd Generation Partnership Project) organization, and is used for accessing a wireless communication network to implement wireless communication. LTE signals can be classified into Low Band (LB), Medium Band (MB), and High Band (HB). Wherein LB comprises a frequency range of 700MHz to 960MHz, MB comprises a frequency range of 1710MHz to 2170MHz, and HB comprises a frequency range of 2300MHz to 2690 MHz. In one embodiment, the frequency ranges may correspond to the low frequency signal radiated by the first segment 211, the intermediate frequency signal radiated by the second segment 212, and the high frequency signal radiated by the third segment 221, respectively, in sequence, thereby ensuring that the antenna assembly 100 can achieve coverage of signals in high, intermediate, and low frequency bands.

In another embodiment, the first segment 211 and the second segment 212 may have the same length and are used for radiating signals of the same frequency band, and the second segment 212 couples the electrical signal to the third segment 221 through the gap, so that the third segment 221 radiates signals of a higher frequency band.

In this embodiment, the antenna assembly 100 further includes a metal dome 23, and the first end 2131 of the first feed line 213 is connected to the second end 2142 of the second feed line 214 through the metal dome 23. The metal elastic piece 23 is a conductive metal piece made of an elastic metal material, and the second end 2142 of the second feed line 214 feeds an electrical signal to the first end 2131 of the first feed line 213 through the metal elastic piece 23, so that the first radiator 21 and the second radiator 22 radiate signals of different frequency bands. Since the second feeding line 214 is disposed on the second circuit board 30, by adjusting the trace width and/or length of the second feeding line 214 on the second circuit board 30, the radiation performance of the antenna assembly 100 can be changed, for example, the second feed line 214 can be arranged to be thinner, the impedance can be reduced, the radiation performance of the antenna can be improved, and the second feed line 214 is connected to the second circuit board 30 by adjusting its position on the second circuit board 30, such as adjusting its distance from the main ground, the SAR value may be reduced, for example, by placing the second feeder 214 at a location that is predominantly closer, increasing the echo consumption, to reduce the SAR value, therefore, by adjusting the second feeding line 214 arranged on the second circuit board 30, the antenna can be conveniently adjusted to achieve better antenna radiation performance, and a lower SAR value can be realized, the influence of signal quality and radiation on a human body is considered, the integral quality of the antenna is further improved, and better communication experience is provided.

The ground terminal of the first radiator 21 is connected to the reference ground terminal of the second circuit board 30. In one embodiment, the ground terminal of the first radiator 21 may be grounded through a ground hole provided in the first circuit board 20; in another embodiment, the ground terminal of the first radiator 21 may be grounded in the form of a spring or a wire.

In this embodiment, the antenna assembly 100 further includes a frequency modulation device 24, the frequency modulation device 24 is connected to the first radiator 21, and the frequency modulation device 24 is configured to set a frequency band of a signal radiated by the first radiator 21. In one embodiment, the frequency modulation device 24 is connected to the first segment 211, and the first segment 211 can radiate the first signal according to the state of the frequency modulation device 24 by the frequency modulation device 24 to cover the first frequency band. In some embodiments, the first segment 211 radiates low frequency signals to cover a low frequency band, and the first segment 211 operates in different secondary bands of the first frequency band by different states of the frequency modulation device 24. The secondary frequency band refers to a plurality of sub-frequency bands included in the low frequency band. For example, in the low frequency band with a frequency range of 700MHz to 960MHz, the secondary frequency band may include, but is not limited to: a low frequency band in the frequency range of 703MHz to 803MHz, a low frequency band in the frequency range of 824MHz to 894MHz, and a low frequency band in the frequency range of 880MHz to 890 MHz.

Further, referring to fig. 4, the frequency modulation device 24 includes a switch module 241 and a plurality of matching modules 242. The matching modules 242 have different electrical parameters, and each electrical parameter corresponds to one frequency band. The matching module 242 includes a plurality of input contacts each connected to one matching module 242 and at least one output contact connected to the first radiator 21, so that the switching module 241 can be selectively connected to at least one of the plurality of matching modules 242, respectively. The matching module 242 may be a capacitor, an inductor, an LC circuit (i.e., a circuit in which an inductor and a capacitor are connected in parallel), or an LC circuit.

Specifically, the different matching modules 242 are connected to the switch module 241, so that the first segment 211 generates different resonant frequencies through different electrical parameters, so as to cover signals of different frequency bands, and further, the first segment 211 operates in different secondary frequency bands. Because the wavelength corresponding to the low frequency band is long, the low frequency band needs to be covered by a segment with a long length. The frequency modulation device 24 enables the first segment 211 to operate in different secondary frequency bands, so that the first segment 211 can cover the low frequency band with a smaller length, thereby enabling the antenna assembly 100 to realize switching of different frequency bands under the condition of smaller headroom, improving the radiation performance of the antenna assembly 100, and enhancing the communication performance of the electronic device.

In some embodiments, the switch module 241 may selectively connect a plurality of different matching modules 242 at the same time. For example, the switching module 241 may simultaneously connect the first matching module 242 and the second matching module 242 to operate the first segment 211 in the first secondary frequency band; or, the first matching module 242 and the third matching module 242 are connected simultaneously to make the first segment 211 operate in the second secondary frequency band; alternatively, the first matching module 242, the second matching module 242, and the third matching module 242 are connected simultaneously to make the first segment 211 operate in the third secondary frequency band. It should be noted that the number of the matching modules 242 may be set according to actual situations, and the number may not correspond to the number of the secondary frequency bands to be switched, and is not limited herein.

As an embodiment, the main board may be used to control the on and off of the switch module 241. Specifically, the main board is provided with a control signal output terminal, which is connected with the control terminal of the switch module 241. For example, the switch module 241 is a multi-way switch chip, and the control terminal of the switch module 241 is the selection terminal of the multi-way switch chip. For example, a 4-by-one multiplexer chip, the selection terminals of which are terminals a1 and a 0. The control signal output end of the main control outputs different control signals to the control end of the switch module 241, and the control end of the switch module 241 controls the on/off between the input contact and the output contact of the switch module 241 according to the received control signals. The control signal may be a pulse signal, i.e., a high level or a low level signal. As one way, the second circuit board 30 may be a main board, or may be another PCB outside the main board.

As another embodiment, the switch module 241 may be a single-pole double-throw switch, and the plurality of matching modules 242 includes a first capacitor and a second capacitor, where capacitance values of the first capacitor and the second capacitor are different, a moving end of the single-pole double-throw switch is connected to the first radiator 21, and two stationary ends of the single-pole double-throw switch are grounded through the first capacitor and the second capacitor, respectively. It will be appreciated that one or both of the first and second capacitors may be replaced by an inductor, or one or both of the first and second capacitors may be replaced by an LC circuit (i.e., a parallel circuit of an inductor and a capacitor), i.e., in one manner, the matching modules 242 include an inductor, and the inductance of the inductor of each matching module 242 is different. The capacitance values of the first capacitor and the second capacitor are set according to the frequency bands corresponding to the antenna structure, and similarly, the values of the inductor and the LC circuit can also be set according to the frequency bands corresponding to the antenna structure. For example, the larger the inductance, the lower the corresponding frequency band. Therefore, the frequency modulation device 24 can adjust the antenna assembly 100 to cover different frequency bands by selecting the matching module 242 through the switching module 241.

In yet another embodiment, the switch module 241 is a single-pole four-throw switch, a moving end of the single-pole four-throw switch is connected to the first radiator 21, and a stationary end of the single-pole four-throw switch is selectively connected to the plurality of matching modules 242. Further, the matching modules 242 are a plurality of parallel inductors with different inductance values, and the inductors with different values are connected through the single-pole four-throw switch to determine different electrical parameters, so that the first segment 211 generates different resonant frequencies to cover different secondary frequency bands. In some embodiments, the matching modules 242 may also be a plurality of capacitors with different values connected in parallel, and the first segment 211 generates different resonant frequencies by switching different capacitance values, so as to cover different secondary frequency bands. It is understood that the switch module 241 can be determined according to actual requirements, for example, the switch module 241 can also be composed of a single-pole double-throw switch and a single-pole four-throw switch together, or a plurality of single-pole four-throw switches, or a plurality of single-pole double-throw switches.

The antenna module that this application embodiment provided includes: the first circuit board is provided with a first radiator and a second radiator; the first circuit board is arranged on the inner side of the shell; the first radiator comprises a first segment, a second segment and a first feeder line, the first feeder line comprises a first end and a second end, and one end of the first segment, one end of the second segment and the second end of the first feeder line are connected with each other; the second circuit board is arranged in the shell and comprises a feed source and a second feeder line, and the feed source is connected with the first end of the first feeder line through the second feeder line; the second radiator and the first radiator are arranged at intervals, and a gap is formed between the second radiator and the tail end of the second section. Therefore, through walk the line simultaneously on first circuit board and second circuit board, the requirement of walking the line on the first circuit board that is located the casing inboard has been reduced on the one hand, and make the width and the length of walking the line on the second circuit board easily adjust, thereby can conveniently debug antenna radiation performance, on the other hand can adjust the distance of antenna and main ground through walking the line on the second circuit board, make the distance closer, not only can strengthen with the ground wire coupling, realize better backward flow, and can be apart from the screen, metal particle is more close, reduce the specific absorption rate, and then can not only realize better antenna radiation performance, but also can reduce the radiation influence to the human body.

Referring to fig. 4, based on the antenna assembly 100, the present application further provides an electronic device 200, where the electronic device 200 includes a housing 210 and the antenna assembly 100.

The electronic apparatus 200 includes a display panel 211 and other devices. The display panel 211 may be a touch display panel, the display panel 211 is connected with the housing 210 to form an accommodating cavity, and the second circuit board 30 is disposed in the accommodating cavity. In one embodiment, the second circuit board 30 has rf transceiver circuitry, a feed, ground, and other functional modules disposed thereon. The display panel 211 is electrically connected to the functional modules of the second circuit board 211 to implement the display function of the display panel 211.

The first circuit board 20 is disposed on the inner side of the top of the housing 210, the second radiator 22 includes a third segment 221, and the third segment 221 is disposed on a bent portion of the top of the housing 210.

The electronic device provided by the embodiment of the application comprises a shell and an antenna assembly, wherein a first circuit board is arranged on the inner side of the top of the shell, and a third segment of a second radiator is arranged on a bent part of the top of the shell. Because the antenna module sets up in casing top inboard, compare in the scheme that sets up in the casing lateral wall, can reduce the specific absorption rate, reduce the injury that the radiation caused to the human body, and, through walk the line simultaneously on first circuit board and second circuit board, reduced the requirement of walking the line on the first circuit board that lies in the casing inboard on the one hand, and make the width and the length of walking the line on the second circuit board easily adjust, thereby can conveniently debug antenna radiation performance, on the other hand can adjust the distance of antenna and main ground through walking the line on the second circuit board, make the distance closer, not only can strengthen with the ground wire coupling, realize better backward flow, and can be apart from the screen, metal particle is nearer, reduce the specific absorption rate, and then can not only realize better antenna radiation performance, but also can reduce the radiation influence to the human body.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. An antenna assembly, applied to an electronic device including a housing, the antenna assembly comprising: the circuit comprises a first circuit board and a second circuit board, wherein the first circuit board is provided with a first radiator and a second radiator;

the first circuit board is arranged on the inner side of the shell;

the first radiator comprises a first segment, a second segment and a first feed line, the first feed line comprises a first end and a second end, and one end of the first segment, one end of the second segment and the second end of the first feed line are connected with each other;

the second circuit board is arranged inside the shell and comprises a feed source and a second feed line, and the feed source is connected with the first end of the first feed line through the second feed line;

the second radiator and the first radiator are arranged at intervals, and a gap is formed between the second radiator and the tail end of the second segment.

2. The antenna assembly of claim 1, wherein the first segment is longer than the second segment.

3. The antenna assembly of claim 1, further comprising a metal dome, wherein the first end of the first feed line and the second end of the second feed line are connected by the metal dome.

4. The antenna assembly of claim 1, wherein a ground terminal of the first radiator is connected to a reference ground terminal of the second circuit board.

5. The antenna assembly of claim 4, further comprising a frequency tuning device connected to the first radiator, the frequency tuning device configured to set a frequency band of a signal radiated by the first radiator.

6. The antenna assembly of claim 5, wherein said frequency tuning device comprises a switching module and a plurality of matching modules, each of said matching modules having different electrical parameters, each of said electrical parameters corresponding to a frequency band; the switch module comprises a plurality of input contacts and at least one output contact, each input contact is connected with one matching module, and the output contact is connected with the first radiator.

7. The antenna assembly of claim 6, wherein the matching modules include inductors, and wherein the inductance values of the inductors of each of the matching modules are different.

8. An electronic device comprising a housing and the antenna assembly of any one of claims 1-7.

9. The electronic device of claim 8, wherein the first circuit board is disposed inside a top portion of the housing.

10. The electronic device of claim 9, wherein the second radiator comprises a third segment disposed at a bent portion of the top of the housing.