阅读说明：本技术 电子设备 (Electronic device ) 是由 朱建基 于 2021-08-31 设计创作，主要内容包括：本申请公开了一种电子设备,所公开的电子设备包括：PCB板、第一环形天线、第二环形天线,其中,所述第一环形天线和所述第二环形天线均设置于所述PCB板上,且所述第一环形天线和所述第二环形天线与所述PCB板电连接,所述第二环形天线设置于所述第一环形天线的外围,且所述第一环形天线的内侧填充有第一介质,所述第一环形天线与所述第二环形天线之间填充有第二介质,所述第一环形天线的厚度值为H1,所述第二环形天线的厚度值为H2,所述H1的值大于所述H2的值。(The application discloses electronic equipment, disclosed electronic equipment includes: the PCB comprises a PCB board, a first loop antenna and a second loop antenna, wherein the first loop antenna and the second loop antenna are arranged on the PCB board and are electrically connected with the PCB board, the second loop antenna is arranged on the periphery of the first loop antenna, a first medium is filled inside the first loop antenna, a second medium is filled between the first loop antenna and the second loop antenna, the thickness value of the first loop antenna is H1, the thickness value of the second loop antenna is H2, and the value of H1 is larger than the value of H2.)

1. An electronic device, comprising: PCB board, first loop antenna, second loop antenna, wherein,

the first loop antenna and the second loop antenna are arranged on the PCB, the first loop antenna and the second loop antenna are electrically connected with the PCB, the second loop antenna is arranged on the periphery of the first loop antenna, a first medium is filled in the inner side of the first loop antenna, a second medium is filled between the first loop antenna and the second loop antenna, the thickness value of the first loop antenna is H1, the thickness value of the second loop antenna is H2, and the value of H1 is larger than the value of H2.

2. The electronic device of claim 1, further comprising: the one end of first switch with first loop antenna connects, the other end with the ground end of PCB board is connected, set gradually on the first loop antenna: the PCB comprises a first feeding point, a first connecting point, a second connecting point and a third connecting point, wherein the first switch is used for controlling the on-off between at least one of the first connecting point, the second connecting point and the third connecting point and the ground end of the PCB.

3. The electronic device of claim 2, wherein the first loop antenna further comprises at least two breaks.

4. The electronic device of claim 3, wherein the break disposed on the first loop antenna comprises: first fracture, second fracture, third fracture and fourth fracture, electronic equipment still includes: a second switch; wherein the content of the first and second substances,

one end of the second switch is connected with the second loop antenna, the other end of the second switch is connected with the PCB, and the second loop antenna is provided with: a fourth connection point, a second feeding point, a fifth connection point and a sixth connection point;

the fourth connecting point passes through the clearance of first fracture with the PCB board is connected, the second feed point passes through the clearance of third fracture with the PCB board is connected, the fifth connecting point passes through the clearance of second fracture with the PCB board is connected, the sixth connecting point passes through the clearance of fourth fracture with the PCB board is connected, the second switch is used for controlling at least one in the fourth connecting point, the fifth connecting point and the sixth connecting point with break-make between the PCB board.

5. The electronic device of claim 3, wherein the break disposed on the first loop antenna comprises: the first connection line of the fifth fracture and the sixth fracture penetrates through the circle center of the first annular antenna, and the fifth fracture and the sixth fracture divide the first annular antenna into a first sub-antenna and a second sub-antenna.

6. The electronic device of claim 5, wherein a seventh discontinuity and an eighth discontinuity are disposed on the second loop antenna, a second connection line between the seventh discontinuity and the eighth discontinuity passes through a center of the second loop antenna, and the seventh discontinuity and the eighth discontinuity divide the second loop antenna into a third sub-antenna and a fourth sub-antenna.

7. The electronic device of claim 6, wherein the first line and the second line are perpendicular.

8. The electronic device of claim 7, further comprising: a third switch; wherein the content of the first and second substances,

one end of the third switch is connected with the first annular antenna, the other end of the third switch is connected with the PCB, and the first sub-antenna is provided with: a third feeding point and a seventh connection point;

the second sub-antenna is provided with: a third connecting line of the third feeding point and the fourth feeding point passes through the circle center of the first loop antenna, and the third connecting line is overlapped with the second connecting line;

the third switch is used for controlling the on-off between at least one of the third feeding point and the fourth feeding point and the PCB.

9. The electronic device of claim 7, further comprising: a fourth switch; wherein the content of the first and second substances,

one end of the fourth switch is connected with the second annular antenna, the other end of the fourth switch is connected with the PCB, and the third sub-antenna is provided with: the fifth feeding point is connected with the PCB through a gap of the fifth fracture;

the fourth sub-antenna is provided with: the sixth feeding point is connected with the PCB through a gap of the sixth fracture, a fourth connecting line of the fifth feeding point and the sixth feeding point penetrates through the circle center of the second loop antenna, and the fourth connecting line is superposed with the first connecting line;

the fourth switch is used for controlling the on-off between at least one of the fifth feeding point and the sixth feeding point and the PCB.

10. The electronic device of any of claims 6-9, further comprising: and the control module is used for controlling and switching a target sub-antenna which is currently in a non-working state into a working state, wherein the target sub-antenna is at least one of the first sub-antenna, the second sub-antenna, the third sub-antenna and the fourth sub-antenna.

Technical Field

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

Background

With the arrival of the 5G era, the concept of everything interconnection is gradually merged into the life of people, and different electronic devices can interact with each other, so that more functions can be realized.

Taking a smart watch as an example, if the smart watch wants to interact with other electronic devices, the most critical ring is a wireless communication system, and an antenna is an important part in the wireless communication system. However, the current smart watch has the characteristics of compact structure, miniaturization and the like, so that great challenges are brought to antenna design, the clearance environment is deteriorated, the wiring area of the antenna is reduced, the performance of the antenna is poor, and the use experience of a user is poor.

Disclosure of Invention

The application discloses electronic equipment to headroom environment among the present electronic equipment worsens the problem that influences antenna performance and leads to user experience not good.

In order to solve the above problems, the following technical solutions are adopted in the present application:

in a first aspect, an embodiment of the present application discloses an electronic device, including: the PCB comprises a PCB board, a first loop antenna and a second loop antenna, wherein the first loop antenna and the second loop antenna are arranged on the PCB board and are electrically connected with the PCB board, the second loop antenna is arranged on the periphery of the first loop antenna, a first medium is filled inside the first loop antenna, a second medium is filled between the first loop antenna and the second loop antenna, the thickness value of the first loop antenna is H1, the thickness value of the second loop antenna is H2, and the value of H1 is larger than the value of H2.

The embodiment of the application discloses technical scheme that this application adopted can reach following beneficial effect:

the embodiment of the application discloses an electronic device, a first loop antenna and a second loop antenna are arranged in an inner-outer loop structure and are arranged on a PCB, a first medium is filled to the inner side of the first loop antenna, a second medium is filled between the first loop antenna and the second loop antenna, the first medium with a smaller dielectric constant and the second medium with a relative dielectric constant close to 1 are selected, so that the structural length of the first loop antenna and the second loop antenna is reduced to a certain extent, a multi-antenna system can be realized in a limited space, the relative thickness of the first loop antenna and the second loop antenna is adjusted by adjusting the thickness value H1 of the first loop antenna and the thickness value H2 of the second loop antenna, and the interference of the second loop antenna to the first loop antenna is smaller under the condition that the ratio of H1 to H2 is smaller, the headroom environment of the antenna in the electronic device can be improved, and thus the antenna performance can be improved. That is to say, the electronic device disclosed in the embodiment of the present application adjusts the relative thickness of the first loop antenna and the second loop antenna through an antenna structure of the inner loop and the outer loop, and can improve the clearance environment of the antenna, so that the problem that the clearance environment in the current electronic device deteriorates and affects the performance of the antenna to cause poor user experience can be solved.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application;

fig. 2 is a side view of an electronic device disclosed in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another electronic device disclosed in the embodiment of the present application;

fig. 4 is a schematic structural diagram of another electronic device disclosed in the embodiment of the present application;

fig. 5 is a schematic diagram of a radiation direction of another electronic device disclosed in the embodiment of the present application when a fourth connection point on a second loop antenna and a second feeding point are turned on;

fig. 6 is a schematic diagram of a radiation direction of another electronic device disclosed in the embodiment of the present application when a fifth connection point on a second loop antenna and a second feeding point are turned on;

fig. 7 is a schematic diagram of a radiation direction of another electronic device disclosed in the embodiment of the present application when a sixth connection point on a second loop antenna and a second feeding point are turned on;

fig. 8 is a schematic structural diagram of another electronic device disclosed in the 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. 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.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

An electronic device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Fig. 1 is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application, and as shown in fig. 1, the embodiment of the present application discloses an electronic device, where the disclosed electronic device includes: PCB board 100, first loop antenna 200, second loop antenna 300, wherein,

the first loop antenna 200 and the second loop antenna 300 are both disposed on the PCB 100, the first loop antenna 200 and the second loop antenna 300 are electrically connected to the PCB 100, the second loop antenna 300 is disposed on the periphery of the first loop antenna 200, the first loop antenna 200 and the second loop antenna 300 may form an inner and outer ring structure, the radius of the first loop antenna 200 is R1, the radius of the second loop antenna 300 is R2, R1< R2, the larger the distance R2-R1 between the first loop antenna 200 and the second loop antenna 300, the smaller the interference of the second loop antenna 300 to the third loop antenna 400.

The first medium 400 is filled inside the first loop antenna 200, the second medium 500 is filled between the first loop antenna 200 and the second loop antenna 300, and the occupied areas of the first loop antenna 200 and the third loop antenna 300 can be reduced by filling the first medium 400 and the second medium 500. In a specific implementation manner, the first medium 400 and the second medium 500 may be filled into the electronic device by injection molding, the first medium 400 may be a medium with low loss, low dielectric constant and wide coverage frequency range, and the first medium 400 may preferably cover a millimeter wave frequency band, where it is noted that the larger the dielectric constant is, the stronger the binding capacity of the medium to charges is, the less easily the medium is polarized, so that the bandwidth of the antenna is correspondingly narrowed, and the longer the structural length required by the antenna is. And the second dielectric 500 may be selected as a dielectric material having a relative dielectric constant close to 1, in this way, the electric field intensity may be enhanced, the radiation frequency of the first loop antenna 200 and the second loop antenna 300 may be made wider, and the occupied areas of the first loop antenna 200 and the second loop antenna may be reduced in a limited space, so that a multi-antenna system may be implemented.

Further, the thickness value of the first loop antenna 200 is H1, the thickness value of the second loop antenna 300 is H2, and the value of H1 is greater than the value of H2. By adjusting the relative thickness between first loop antenna 200 and second loop antenna 300, the headroom of the electronic device can be improved, and the smaller the ratio of H2 to H1, the less interference of second loop antenna 300 on first loop antenna 200 can be caused, so that the headroom of the antenna can be improved.

The embodiment of the application discloses an electronic device, a first loop antenna and a second loop antenna are arranged in an inner and outer loop structure and are arranged on a PCB board, a first medium is filled to the inner side of the first loop antenna, a second medium is filled between the first loop antenna and the second loop antenna, the length of the first loop antenna and the second loop antenna is reduced to a certain extent by selecting the first medium with a smaller dielectric constant and the second medium with a relative dielectric constant close to 1, so that a multi-antenna system can be realized in a limited space, the relative thickness of the first loop antenna and the second loop antenna is adjusted by adjusting the thickness value H1 of the first loop antenna and the thickness value H2 of the second loop antenna, the interference of the second loop antenna to the first loop antenna is smaller under the condition that the ratio of H1 to H2 is smaller, the headroom environment of the antenna in the electronic device can be improved, and thus the antenna performance can be improved. That is to say, the electronic device disclosed in the embodiment of the present application adjusts the relative thickness of the first loop antenna and the second loop antenna through an antenna structure of the inner loop and the outer loop, and can improve the clearance environment of the antenna, so that the problem that the clearance environment in the current electronic device deteriorates and affects the performance of the antenna to cause poor user experience can be solved.

In an implementation manner, the first Loop Antenna 200 may be a patch Antenna, the main radiation electric field of the first Loop Antenna may be located in the longitudinal and transverse radiator edge regions, and the Antenna performance may be adjusted according to different feeding points and fracture positions on the first Loop Antenna 200, and the second Loop Antenna 300 may be arbitrarily configured as an Inverted F Antenna (IFA), a Monopole (Monopole) Antenna, or a Loop (Loop) Antenna, in which case, the first Loop Antenna 200 may serve as a partial structure, and the second Loop Antenna 300 is centrally designed, so that the electric field strength region of the edge may be avoided, and in a case that the ratio of H2 to H1 is smaller, the interference of the second Loop Antenna 300 to the first Loop Antenna is smaller, so that H1 and H2 may be adjusted, a clearance environment is improved, and the Antenna performance of the electronic device is more stable.

Fig. 2 is a side view of an electronic device, in fig. 2, a thickness of first loop antenna 200 is H1, a thickness of second loop antenna 300 is H2, and in order to reduce interference between first loop antenna 200 and second loop antenna 300, a ratio of thickness H1 of first loop antenna 200 to thickness H2 of second loop antenna 300 may be reasonably set, and the smaller the ratio, the smaller interference between the two antennas, so that the headroom of the antennas may be improved. In addition, the embodiment of the present application does not specifically limit the specific design of the thickness H1 of the first loop antenna 200 and the thickness H2 of the second loop antenna 300.

In an implementation manner, fig. 3 is a schematic structural diagram of another electronic device disclosed in the embodiment of the present application, and as shown in fig. 3, the electronic device disclosed in the embodiment of the present application further includes: first switch 600, the one end and the first loop antenna 200 of first switch 600 are connected, and the other end is connected with the ground end of PCB board 100, has set gradually on the first loop antenna 200: the first switch 600 is used for controlling the connection and disconnection between at least one of the first connection point 202, the second connection point 203 and the third connection point 204 and the ground terminal of the PCB board 100.

In the present embodiment, the second loop antenna 300 may act as a parasitic mechanism, and thus may function as an auxiliary radiation. The first loop antenna 200 can be fed with current in the PCB 100 through the first feeding point 201, and the first switch 600 can control on/off between at least one of the first connection point 202, the second connection point 203 and the third connection point 204 and the ground of the PCB 100, so that different paths can be controlled to be formed by different connection points with the first feeding point 201, the first loop antenna 200 and the PCB 100, and thus, multiple antenna modes can be excited to operate in multiple frequency bands, and thus, the performance of the antenna can be adjusted.

At least two breaks may also be provided on the first loop antenna 200. As shown in fig. 4, the break provided on the first loop antenna 200 may include: the first break 205, the second break 206, the third break 207, and the fourth break 208 can excite different antenna modes by adjusting the first switch 600, specifically, when the first switch 600 is in a closed state, the first loop antenna 200 is in a Monopole mode, the working mode of the first loop antenna is in a Monopole mode with a quarter wavelength, and the working frequency is f 1; in the case where the first switch 600 controls the first connection point 202 to be in the on state, at this time, the first loop antenna 200 is in the form of IFA, and the operation mode thereof is the IFA mode of quarter wavelength; when the first switch 600 controls the third connection point 204 to be in the on state, the first Loop antenna 200 is a Loop antenna, and the operation mode thereof is a Loop mode with a half wavelength, the operation frequency is f2, and in general, f2 is 2 × f 1.

It should be noted that the first switch 600 controls to connect different connection points, which is equivalent to the first loop antenna 200 connecting a small inductor in parallel to the ground of the PCB board 100, so as to adjust the initial impedance of the first loop antenna 200, that is, the first switch 600 controls to connect or disconnect different connection points and the ground of the PCB board 100, that is, the first switch 600 can load inductors at different positions, and then adjust the initial impedance of the first loop antenna 200, so as to adjust the operating mode of the antenna, and further obtain a multiband antenna.

In an implementation manner, fig. 4 is a schematic structural diagram of another electronic device, as shown in fig. 4, the number of fractures provided on the first loop antenna 200 may be 4, and the electronic device disclosed in the embodiment of the present application may further include: a second switch 700; wherein the content of the first and second substances,

one end of the second switch 700 is connected to the second loop antenna 300, and the other end is connected to the PCB board 100, and the second loop antenna 300 may be provided with: a fourth connection point 301, a second feeding point 302, a fifth connection point 303 and a sixth connection point 304, wherein the fourth connection point 301 may be connected to the PCB board 100 through a gap of the first break 205, the second feeding point 302 may be connected to the PCB board 100 through a gap of the third break 207, the fifth connection point 303 may be connected to the PCB board 100 through a gap of the second break 206, and the sixth connection point 304 may be connected to the PCB board 100 through a gap of the fourth break 208. The second switch 700 is used for controlling the on/off between at least one of the fourth connection point 301, the fifth connection point 303 and the sixth connection point 304 and the PCB 100, so that different antenna operation modes can be selected, and the free switching of multiple antenna modes can be realized.

In this embodiment, the second feeding point 302 and the loading device of the second loop antenna 300 are respectively introduced from four fractures of the first loop antenna 200, at this time, the second loop antenna 300 may serve as a radiator, and the first loop antenna 200 and the second loop antenna 300 operate simultaneously, so that coverable frequency bands of the first loop antenna 200 and the second loop antenna 300 may be increased, and the first switch 600 and the second switch 700 operate simultaneously, so that different connection points may be selected to be conducted with the PCB board 100, and thus, free switching of multiple antenna modes may be achieved.

Specifically, under the condition that the second switch 700 controls the second feeding point 302 to be conducted, the first loop antenna 200 and the second loop antenna 300 work simultaneously, at this time, the antenna is in a Monopole mode, and the working mode is a Monopole mode with a quarter wavelength and corresponds to the working frequency f 1; in a state where the second switch 700 controls the fourth connection point 301 and the second feeding point 302 to be conducted, as shown in fig. 5, the antenna form is switched to a Loop antenna, and the operation mode is a Loop mode, where the second Loop antenna 300 has two radiation arms: the radiation directions of the first radiation arm formed by the antenna from the fourth connection point 301 to the second feeding point 302 in the second loop antenna 300 in the counterclockwise direction and the second radiation arm formed by the antenna from the second feeding point 302 to the fourth connection point 301 in the second loop antenna 300 in the counterclockwise direction of the second loop antenna 300 in the remaining circumference of the second loop antenna 300 correspond to different operating frequencies f2 and f3, respectively (f3< f 2).

In the case where the second switch 700 controls the second feeding point 302 and the fifth connection point 303 to be in a conducting state, as shown in fig. 6, the antenna form is switched to a Loop antenna with different orientations, and the operation mode is a Loop mode. The second loop antenna 300 now has two radiating arms: a third radiation arm of the second loop antenna 300 and a fourth radiation arm with the remaining circumference, wherein the third radiation arm is formed by an antenna from the fifth connection point 303 to the second feeding point 302 in the second loop antenna 300 in the clockwise direction, the fourth radiation arm is formed by an antenna from the second feeding point 302 to the fifth connection point 303 in the second loop antenna 300 in the clockwise direction, the length of the third radiation arm is equal to the length of the first radiation arm, and thus the radiation frequency is unchanged, but the radiation direction is distributed in the mirror image direction of the x axis.

In the case where the second switch 700 controls the second feeding point 302 and the sixth connecting point 304 to be in the conducting state, as shown in fig. 7, the antenna form is switched to the Loop antenna with the y-axis orientation, and the operation mode is the Loop mode. In this case, the second loop antenna 300 has two equal-length radiating arms, that is, in the third loop antenna 300, the antenna from the sixth connection point 304 to the second feeding point 302 in the clockwise direction may form a fifth radiating arm, and the antenna from the second feeding point 302 to the sixth connection point 304 in the clockwise direction may form a sixth radiating arm, and the corresponding radiating frequencies are both f 4. Since the length of the first radiation arm < the length of the sixth radiation arm < the length of the second radiation arm, and thus the operating frequency f2> f4> f3, the radiation directions are distributed in the y-axis direction in this state.

In this way, various combinations can be developed through the first switch 600 and the second switch 700, and the free switching of the three antenna modes can be realized.

In an implementation manner, fig. 8 is a schematic structural diagram of another electronic device, and as shown in fig. 8, a break provided on the first loop antenna 200 includes: a fifth break 209 and a sixth break 210, a first connection line of the fifth break 209 and the sixth break 210 passing through a center of the first loop antenna 200, and the fifth break 209 and the sixth break 210 may divide the first loop antenna 200 into a first sub-antenna 211 and a second sub-antenna 212.

The second loop antenna 300 is provided with a seventh discontinuity 305 and an eighth discontinuity 306, a second connection line between the seventh discontinuity 305 and the eighth discontinuity 306 passes through a center of the second loop antenna 300, and the seventh discontinuity 305 and the eighth discontinuity 306 divide the second loop antenna 300 into a third sub-antenna 307 and a fourth sub-antenna 308.

In this case, each of the first loop antenna 200 and the second loop antenna 300 may include two independent antennas, and since the length of the radiating arm is determined by the width of the break, the width of the break provided in the first loop antenna 200 and the second loop antenna 300 may be adjusted to adjust the operating frequency band of the antennas.

In the embodiment of the present application, the first wire and the second wire are perpendicular, so that in the case where the first loop antenna 200 and the second loop antenna 300 operate simultaneously, the mutual interference therebetween is small.

In addition, the electronic device disclosed in the embodiment of the present application may further include: a third switch 800 and a fourth switch 900; wherein the content of the first and second substances,

one end of the third switch 800 is connected to the first loop antenna 200, and the other end is connected to the PCB board 100, and the first sub antenna 211 may have: the third feeding point 213 and the seventh connection point 214 may be provided on the second sub-antenna 212: a fourth feeding point 215 and an eighth connection point 216, and a third connection line of the third feeding point 213 and the fourth feeding point 215 passes through the center of the first loop antenna 200, and the third connection line coincides with the second connection line described above. The third switch 800 is used for controlling the on/off between at least one of the third feeding point 213 and the fourth feeding point 215 and the PCB board 100. By adjusting the position of the seventh connection point 214 and the eighth connection point 216, different antenna modes, e.g. IFA mode or Loop mode, may be excited.

One end of the fourth switch 900 is connected to the second loop antenna 300, and the other end is connected to the PCB board 100, and the third sub antenna 307 may be provided with: and a fifth feeding point 309, wherein the fifth feeding point 309 is connected with the PCB board 100 through the gap of the fifth discontinuity 209.

On the fourth sub-antenna 308, there may be disposed: a sixth feeding point 310, the sixth feeding point 310 is connected to the PCB board 100 through the gap of the sixth discontinuity 210, a fourth connecting line between the fifth feeding point 309 and the sixth feeding point 310 passes through the center of the second loop antenna 300, and the fourth connecting line coincides with the first connecting line.

In this case, the third feeding point 213, the fourth feeding point 215, the fifth feeding point 309 and the sixth feeding point 310 are orthogonally distributed, and in the case where the first loop antenna 200 and the second loop antenna 300 operate simultaneously, the mutual influence of the two can be reduced by this design.

In a specific implementation manner, as shown in fig. 8, the break provided on the first loop antenna 200 includes: the fifth discontinuity 209 and the sixth discontinuity 210, and the fifth discontinuity 209 and the sixth discontinuity 210 may divide the first loop antenna 200 into a first sub antenna 211 and a second sub antenna 212, the second loop antenna 300 is provided with a seventh discontinuity 305 and an eighth discontinuity 306, and the seventh discontinuity 305 and the eighth discontinuity 306 divide the second loop antenna 300 into a third sub antenna 307 and a fourth sub antenna 308. The third feeding point 213 and the fourth feeding point 215 of the first loop antenna 200 are disposed at the region with better clearance, that is, at both ends of the third connection line of the first loop antenna 200, in this state, since the feeding point of the first loop antenna 200 is designed at a position farther from the human body, the strong magnetic field of the first loop antenna 200 falls more at the region with better clearance, and thus the absorption by the human body can be reduced. Since the thickness of the first loop antenna 200 is H1, the thickness of the second loop antenna 300 is H2, and H1< H2, so that the headroom is approximately (H1-H2)/2, the headroom of the second loop antenna 300 increases as H1 increases. Although the fifth feeding point 309 and the sixth feeding point 310 of the second loop antenna 300 are designed at the area closer to the human body, i.e. at the two ends of the fourth connection line of the second loop antenna 300, the absorption of the human body is less because the clearance of the second loop antenna 300 is better, and at this time, the antennas of the third sub-antenna 307 and the fourth sub-antenna 308 are in the form of Monopole antennas, and the operation mode is a quarter-wavelength Monopole mode.

It should be noted that, because the field distribution of the antenna of the electronic device is a key factor determining the absorption of the human body, when the strong magnetic field is located in a region with better clearance on both sides (i.e. the position corresponding to the position of the seventh fracture 305 and the position corresponding to the position of the eighth fracture 306), the absorption of the energy by the human body is less, and further, the radiation performance of the antenna is better; when the strong magnetic field is located in a region close to the human body (i.e. the positions corresponding to the positions of the fifth fracture 209 and the sixth fracture 210), the clearance is poor, the human body absorbs more energy, and further the radiation performance of the antenna is poor.

In addition, through the third switch 800, the on/off between at least one of the third feeding point 213 and the fourth feeding point 214 provided on the first sub-antenna 211 and the second sub-antenna 212 and the PCB board 100 may be controlled; through the fourth switch 900, the on-off between at least one of the fifth feed point 309 and the sixth feed point 310 arranged on the third sub-antenna 307 and the fourth sub-antenna 308 and the PCB 100 can be controlled, so that the position of the strong magnetic field can be adjusted, the human body is avoided, the absorption of the human body is reduced, and the antenna performance is improved.

In this embodiment of the present application, in order to quickly switch the sub-antenna to one of the better environments, the electronic device disclosed in this embodiment of the present application may further include: and a control module, configured to control switching of a target sub-antenna currently in a non-operating state to enter an operating state, where the target sub-antenna is at least one of the first sub-antenna 211, the second sub-antenna 212, the third sub-antenna 307, and the fourth sub-antenna 308.

In an implementation manner, when the control module receives a detection signal sent by an antenna, it may determine whether a signal value of the detection signal reaches a certain value, and when the signal value is not greater than a preset threshold, that is, when the signal value of the detection signal is attenuated to a certain threshold, the control module may control to switch a target sub-antenna currently in a non-working state to enter a working state, where the target sub-antenna is at least one of the first sub-antenna 211, the second sub-antenna 212, the third sub-antenna 307, and the fourth sub-antenna 308. In this way, the change of the antenna headroom can be identified, and the antenna can be switched to another sub-antenna with better headroom environment, so that the use experience of the user can be improved.

Specifically, in the case that the hand orientation of the user is y-direction, the clearance environment of the second loop antenna 300 is better, so that the third sub-antenna 307 and the fourth sub-antenna 308 can form a two-unit MIMO, for example, in the case that the third sub-antenna 307 is operated, the third sub-antenna 307 can send a detection signal to the control module, and when the control module detects that the signal value of the detection signal is attenuated to a certain threshold value, the control module can currently set the fourth sub-antenna 308 in the non-operation state or enter the operation state. Similarly, the first sub-antenna 211 and the second sub-antenna 212 may also follow this manner, and perform dynamic identification for the wearing position of the electronic device, thereby implementing work scene discrimination, and only switching antennas, so as to improve user experience.

In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.