Antenna structure and electronic device

Abstract

The application provides an antenna structure and an electronic device. The antenna structure comprises: a dielectric substrate comprising a first surface and a second surface; a radiation part; a grounding part, the radiation part and the grounding part being arranged on the first surface, and the radiation part and the grounding part being coupled to each other; and a circuit unit connected to the radiation part, the circuit unit comprising a first circuit and a second circuit, the first circuit being arranged around the radiation part and the grounding part, and the second circuit being arranged on the second surface, and the first circuit and the second circuit each comprising a plurality of radio frequency chokes. Thus, the coupling of the radiation part and the grounding part expands the bandwidth of the antenna unit; the first circuit and the second circuit shield direct current signals and noise of the circuits around the antenna unit, reduce the influence of the direct current signals in the surrounding circuits on the antenna structure, and improve the radiation efficiency of the antenna structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, and in particular to an antenna structure and an electronic device. BACKGROUND

[0002] With the continuous development of science and technology, electronic technology is also changing rapidly, and the requirements in various aspects are becoming more and more precise. Various electronic devices, such as electronic watches, mobile phones, augmented reality (AR) glasses, tablet computers, notebook computers, and the like, are developing towards the direction of functional diversification, light and thin volume, and faster and more efficient data transmission. This requires higher working efficiency of the antenna, and the design space for the antenna is becoming smaller and smaller. Due to the close arrangement of the components of the circuit board, mutual interference exists between the components, which affects the noise of the antenna. SUMMARY

[0003] Therefore, it is necessary to provide an antenna structure and an electronic device to solve the above problems.

[0004] The present application provides an antenna structure, which comprises: a dielectric substrate comprising a first surface and a second surface; a radiation part; a grounding part, the radiation part and the grounding part being arranged on the first surface, and the radiation part and the grounding part being coupled to each other; and a circuit unit connected to the radiation part, the circuit unit comprising a first circuit and a second circuit, the first circuit being arranged around the radiation part and the grounding part, and the second circuit being arranged on the second surface, the first circuit and the second circuit each comprising a plurality of radio frequency chokes.

[0005] Further, the radiation part comprises a first radiation part, a second radiation part, a third radiation part, and a connecting part; the first radiation part, the second radiation part, and the third radiation part are arranged in sequence with intervals and are connected to the connecting part, and the connecting part is connected to the grounding part.

[0006] Further, the length of the second radiation part is greater than the length of the first radiation part, and the length of the first radiation part is greater than the length of the third radiation part.

[0007] Further, the connecting part comprises a first connecting part, a second connecting part, and a third connecting part; the first connecting part is connected perpendicularly to a first end of the second connecting part, and the third connecting part is connected perpendicularly to a second end of the second connecting part. The first end of the first radiation part, the first end of the second radiation part, and the first end of the third radiation part are connected to the first connecting part, and the third connecting part is connected to the grounding part.

[0008] Further, the ground part comprises a first ground part and a second ground part; the length of the second ground part is less than the length of the first ground part, and one end of the second ground part is connected to one end of the first ground part; the third connecting part is connected to the first ground part, and the third connecting part is spaced apart from the second ground part. The second radiating part is arranged on the side of the second ground part away from the first ground part, and part of the second end of the second radiating part is spaced apart from the second ground part; the third radiating part is arranged flush with the side of the second ground part away from the first ground part, and the second end of the third radiating part is spaced apart from the second ground part.

[0009] Further, the first radiating part and the second radiating part are coupled with the second ground part, and the first radiating frequency band is excited. The third radiating part is coupled with the first ground part, and the second radiating frequency band is excited.

[0010] Further, the first end of the first circuit is connected to the positive pole of the voltage source through the first radio frequency choke, and the first end of the first circuit is also connected to the ground part through the second radio frequency choke; the second end of the first circuit is connected to the ground part through the third radio frequency choke.

[0011] Further, the first end of the second circuit is connected to the negative pole of the voltage source through the fourth radio frequency choke, and the first end of the second circuit is also connected to the ground part through the fifth radio frequency choke; the second end of the second circuit is connected to the ground part through the sixth radio frequency choke.

[0012] Further, the first radio frequency choke, the second radio frequency choke, the third radio frequency choke, the fourth radio frequency choke, the fifth radio frequency choke, and the sixth radio frequency choke are arranged on the first surface, and the first end of the second circuit is connected to the fourth radio frequency choke through the first metal through hole; the second end of the second circuit is connected to the sixth radio frequency choke through the second metal through hole.

[0013] The application also provides an electronic device comprising the antenna structure, and the electronic device communicates with other communication devices through the antenna structure.

[0014] The antenna structure provided by the application expands the bandwidth of the antenna structure by coupling the radiating part and the ground part. In addition, the first circuit and the second circuit are arranged around the radiating part and the ground part, and the first circuit and the second circuit comprise a plurality of radio frequency chokes to shield the direct current signals and noise of the circuits around the antenna structure, reduce the influence of the direct current signals in the surrounding circuits on the antenna structure, and improve the radiation efficiency of the antenna structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 、 Figure 2 and Figure 3is a structural schematic diagram of an antenna structure proposed by an embodiment of the present application;

[0016] Figure 4 is another structural schematic diagram of an antenna structure proposed by an embodiment of the present application;

[0017] Figure 5 is a field pattern effect diagram of an antenna structure proposed by an embodiment of the present application;

[0018] Figure 6 is a return loss parameter curve diagram of an antenna structure proposed by an embodiment of the present application;

[0019] Figure 7 is a structural schematic diagram of an electronic device proposed by an embodiment of the present application.

[0020] Main element symbol explanation

[0021] Antenna structure 100

[0022] Antenna unit 10

[0023] Radiating part 11

[0024] First radiating part 111

[0025] Second radiating part 112

[0026] Third radiating part 113

[0027] Connecting part 114

[0028] First connecting part 1141

[0029] Second connecting part 1142

[0030] Third connecting part 1143

[0031] Grounding part 12

[0032] First grounding part 121

[0033] Second grounding part 122

[0034] Dielectric substrate 13

[0035] Circuit unit 20

[0036] First circuit 21

[0037] Second circuit 22

[0038] Radio frequency choke coil 23

[0039] First radio frequency choke coil 231

[0040] Second radio frequency choke coil 232

[0041] Third radio frequency choke coil 233

[0042] Fourth radio frequency choke coil 234

[0043] Fifth radio frequency choke coil 235

[0044] Sixth radio frequency choke coil 236

[0045] First metal via hole A1

[0046] Second metal via hole A2

[0047] Metal via hole A3

[0048] Electronic device 200

[0049] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0052] The terms "first" and "second" and the like in the description of the specification and the above drawings are used to distinguish different objects, and are not intended to describe a particular order. In addition, the term "comprising" and any variation thereof is intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or modules is not limited to the listed steps or modules, but can optionally include steps or modules that are not listed, or can optionally include other steps or modules inherent to the process, method, product or device.

[0053] Some embodiments of the present application will be described in detail below in conjunction with the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0054] Nowadays, various electronic devices (for example, electronic watches, mobile phones, augmented reality (AR) glasses, tablet computers, notebook computers) develop towards the direction of diversified functions, light and thin volume, and faster and more efficient data transmission, while the working efficiency of the antenna is required to be higher and higher, and the design space given to the antenna is smaller and smaller. Due to the close arrangement of the components of the circuit board, mutual interference exists between the components, which is easy to cause noise influence on the antenna.

[0055] The present application provides an antenna structure to solve the above problems. By setting the radiation part and the ground part to be coupled to generate a new antenna frequency band, thereby increasing the bandwidth of the antenna structure; and by setting a plurality of radio frequency choke coils around the antenna unit to shield the influence of the direct current signal of the surrounding circuit on the antenna structure.

[0056] Please refer to Figure 1 , the structure diagram of the antenna structure 100 provided by the embodiment of the present application. The antenna structure 100 includes an antenna unit 10. In some embodiments, the antenna structure 100 can be arranged in various electronic devices (for example, electronic watches, mobile phones, augmented reality (AR) glasses, tablet computers, notebook computers) for use.

[0057] The antenna unit 10 includes a radiation part 11, a ground part 12 and a dielectric substrate 13. Wherein, the dielectric substrate 13 includes a first surface 131 and a second surface 132 (see Figure 4 ). In some embodiments, the shape of the dielectric substrate 13 is rectangular. Of course, in other embodiments, the shape of the dielectric substrate 13 is not limited.

[0058] Please refer to Figure 2 , the radiation part 11 and the ground part 12 are arranged on the first surface 131 of the dielectric substrate 13. Specifically, the radiation part 11 includes a first radiation part 111, a second radiation part 112, a third radiation part 113 and a connecting part 114. Wherein, the first radiation part 111, the second radiation part 112 and the third radiation part 113 are arranged in sequence and are spaced apart, and are all connected to the connecting part 114, and the connecting part 114 is connected to the ground part 12. Wherein, the first radiation part 111, the second radiation part 112 and the third radiation part 113 are arranged substantially parallel to each other, and are all connected substantially perpendicular to the connecting part 114. In some embodiments, the length of the second radiation part 112 is greater than the length of the first radiation part 111, and the length of the first radiation part 111 is greater than the length of the third radiation part 113.

[0059] Specifically, the connecting part 114 includes a first connecting part 1141, a second connecting part 1142 and a third connecting part 1143. The first connecting part 1141 is vertically arranged at a first end of the second connecting part 1142, and the third connecting part 1143 is vertically arranged at a second end of the second connecting part 1142. The first end of the first radiating part 111, the first end of the second radiating part 112 and the first end of the third radiating part 113 are all connected to the first connecting part 1141, and the third connecting part 1143 is connected to the grounding part 12.

[0060] The grounding part 12 includes a first grounding part 121 and a second grounding part 122. The length of the second grounding part 122 is less than the length of the first grounding part 121, and one end of the second grounding part 122 is connected to the first grounding part 121 in alignment. Specifically, the third connecting part 1143 is connected to the first grounding part 121, and the third connecting part 1143 is arranged in a spaced-apart manner with the second grounding part 122.

[0061] The second radiating part 112 is arranged on the side of the second grounding part 122 away from the first grounding part 121, and part of the second end of the second radiating part 112 is arranged in a spaced-apart manner with the second grounding part 122. The third radiating part 113 is arranged in a flush manner on the side of the second grounding part 122 away from the first grounding part 121, and the second end of the third radiating part 113 is arranged in a spaced-apart manner with the second grounding part 122. In some embodiments, the grounding part 12 can be a printed circuit board (PCB).

[0062] In the embodiments of the present application, a feeding point (not shown in the figure) is arranged on the third connecting part, so as to feed current to the radiating part 11 through the feeding point.

[0063] Specifically, the first radiating part 111 and the second radiating part 112 are coupled with the second grounding part 122, so as to excite a first radiating frequency band. The third radiating part 113 is coupled with the first grounding part 121, so as to excite a second radiating frequency band. Therefore, through the above structure, the antenna unit 10 can form multiple current paths, so as to excite multiple radiating frequency bands, expand the frequency width of the antenna unit 10, and improve the signal transmission rate of the antenna unit 10.

[0064] Please refer to Figure 3 and Figure 4The antenna structure 100 further comprises a circuit unit 20. Specifically, the circuit unit 20 comprises a first circuit 21 and a second circuit 22. The first circuit 21 is disposed on the first surface 131 of the dielectric substrate 13 and distributed around the antenna unit 10. The second circuit 22 is disposed on the second surface 132 of the dielectric substrate 13 and distributed at the edge of the dielectric substrate 13. In the embodiments of the present application, a plurality of radio frequency chokes 23 are disposed on the first circuit 21 and the second circuit 22 to isolate the direct current signal and noise of the circuit around the antenna unit 10. In some embodiments, the inductance value of each radio frequency choke 23 is less than or equal to 100 nanohenry (nH).

[0065] Specifically, the first end of the first circuit 21 is connected with the positive pole V+ of the voltage source through a first radio frequency choke 231 and connected with the ground part 12 through a second radio frequency choke 232. The second end of the first circuit 21 is connected with the ground part 12 through a third radio frequency choke 233. The first end of the second circuit 22 is connected with the negative pole V- of the voltage source through a fourth radio frequency choke 234 and connected with the ground part 12 through a fifth radio frequency choke 235. The second end of the second circuit 22 is connected with the ground part 12 through a sixth radio frequency choke 236. The first radio frequency choke 231 is formed by welding with the second radio frequency choke 232.

[0066] The first radio frequency choke 231, the second radio frequency choke 232, the third radio frequency choke 233, the fourth radio frequency choke 234, the fifth radio frequency choke 235 and the sixth radio frequency choke 236 are all disposed on the first surface 131. The first end of the second circuit 22 is connected with the fourth radio frequency choke 234 through a first metal via hole A1, and the second end of the second circuit 22 is connected with the sixth radio frequency choke 236 through a second metal via hole A2. The first metal via hole A1 and the second metal via hole A2 are disposed on the dielectric substrate 13 and distributed beside the second circuit 22.

[0067] In some embodiments, a plurality of metal via holes A3 are further disposed on the dielectric substrate 13 and distributed around the first circuit 21 and the second circuit 22. The first circuit 21 and the second circuit 22 can be electrically connected with each other by being connected to the metal via holes A3.

[0068] It can be understood that a plurality of radio frequency chokes are connected in series between the first end and the second end of the first circuit 21. A plurality of radio frequency chokes are connected in series between the first end and the second end of the second circuit 22. The present application does not limit the number and connection mode of the radio frequency chokes in the first circuit 21 and the second circuit 22.

[0069] In the embodiment of the present application, the first circuit 21 and the second circuit 22 isolate the direct current signal of the circuit source and the electronic element around the antenna unit 10 from the plurality of radio frequency chokes 23 arranged around the antenna unit 10, so as to ensure that the signal transmission of the antenna unit 10 is not affected by the direct current signal in the surrounding circuit.

[0070] Please refer to Figure 5 the field pattern effect diagram of the antenna structure 100 provided in the embodiment of the present application. It can be obviously seen from Figure 5 that the antenna signal of the antenna structure 100 radiates to each direction, and it can be seen that the radiation signal of the antenna structure 100 has better omnidirectionality.

[0071] Please refer to Figure 6 the return loss parameter curve diagram of the antenna structure 100 provided in the embodiment of the present application. Obviously, it can be seen from Figure 6 that the return loss of the antenna structure 100 is less than 0 (decibel) dB in each radiation frequency band, which indicates that the return loss of the antenna structure 100 is low, the signal reflected by the antenna structure 100 itself is small, and the radiation frequency is high. It can also be seen from Figure 6 that, due to the coupling between the first radiation part 111 and the second radiation part 112 and the second ground part 122, the return loss of the antenna structure 100 in the first radiation frequency band (1.6 gigahertz (GHz)-1.8 GHz band) is obviously decreased. Due to the coupling between the third radiation part 113 and the first ground part 121, the return loss of the antenna structure 100 in the second radiation frequency band (4.75 GHz-5.75 GHz) is also obviously decreased.

[0072] The antenna structure 100 provided in the present application expands the bandwidth of the antenna structure 100 by arranging the coupling between the radiation part 11 and the ground part 12, so that the radiation part 11 and the ground part 12 are coupled. In addition, the first circuit 21 and the second circuit 22 are arranged around the radiation part 11 and the ground part 12, wherein the first circuit 21 and the second circuit 22 include a plurality of radio frequency chokes, so as to shield the direct current signal of the circuit around the antenna unit 10, reduce the influence of the direct current signal in the surrounding circuit on the antenna structure 100, and improve the radiation efficiency of the antenna structure 100.

[0073] Please refer to Figure 7Fig. 1 shows a schematic diagram of an electronic device 200 according to an embodiment of the present application. In the embodiment, the electronic device 200 comprises a memory (not shown), a processor (not shown) and an antenna structure 100. In some embodiments, the electronic device 200 can be an electronic watch, a mobile phone, an augmented reality (AR) glass, a tablet computer, a notebook computer. Specifically, the electronic device 200 communicates with other communication devices by transmitting signals through the antenna structure 100.

[0074] Those skilled in the art should understand that the above-described embodiments are only used to explain the present application, but not to limit the present application, and any modification and change made within the spirit and principle of the present application should fall into the scope of the present application.

Claims

1. An antenna structure, characterized by The antenna structure comprises: a dielectric substrate comprising a first surface and a second surface; a radiation portion; a ground portion, the radiation portion and the ground portion being disposed on the first surface, and the radiation portion and the ground portion being coupled to each other; a circuit unit connected to the radiation portion, the circuit unit comprising a first circuit and a second circuit, the first circuit being disposed around the radiation portion and the ground portion, and the second circuit being disposed on the second surface, the first circuit and the second circuit each comprising a plurality of radio frequency chokes; wherein a first end of the first circuit is connected to a positive pole of a voltage source through a first radio frequency choke, and the first end of the first circuit is also connected to the ground portion through a second radio frequency choke; a second end of the first circuit is connected to the ground portion through a third radio frequency choke; a first end of the second circuit is connected to a negative pole of the voltage source through a fourth radio frequency choke, and the first end of the second circuit is also connected to the ground portion through a fifth radio frequency choke; a second end of the second circuit is connected to the ground portion through a sixth radio frequency choke; the first radio frequency choke, the second radio frequency choke, the third radio frequency choke, the fourth radio frequency choke, the fifth radio frequency choke and the sixth radio frequency choke are all disposed on the first surface, the first end of the second circuit is connected to the fourth radio frequency choke through a first metal via, and the second end of the second circuit is connected to the sixth radio frequency choke through a second metal via.

2. The antenna structure of claim 1, wherein, The radiation portion comprises a first radiation portion, a second radiation portion, a third radiation portion and a connecting portion; wherein the first radiation portion, the second radiation portion and the third radiation portion are sequentially and spacedly disposed and are all connected to the connecting portion, and the connecting portion is connected to the ground portion.

3. The antenna structure of claim 2, wherein, The length of the second radiation portion is greater than the length of the first radiation portion, and the length of the first radiation portion is greater than the length of the third radiation portion.

4. The antenna structure of claim 2, wherein, The connecting portion comprises a first connecting portion, a second connecting portion and a third connecting portion; the first connecting portion is perpendicularly connected to a first end of the second connecting portion, and the third connecting portion is perpendicularly connected to a second end of the second connecting portion; first ends of the first radiation portion, the second radiation portion and the third radiation portion are all connected to the first connecting portion, and the third connecting portion is connected to the ground portion.

5. The antenna structure of claim 4, wherein, The ground portion comprises a first ground portion and a second ground portion; wherein the length of the second ground portion is less than the length of the first ground portion, one end of the second ground portion is aligned and connected to one end of the first ground portion; the third connecting portion is connected to the first ground portion, and the third connecting portion is spacedly disposed from the second ground portion; the second radiation portion is disposed on a side of the second ground portion away from the first ground portion, and a part of a second end of the second radiation portion is spacedly disposed from the second ground portion; the third radiation portion is disposed in parallel with the side of the second ground portion away from the first ground portion, and a second end of the third radiation portion is spacedly disposed from the second ground portion.

6. The antenna structure of claim 5, wherein, The first radiation part and the second radiation part are coupled with the second ground part, and a first radiation frequency band is excited; The third radiation part is coupled with the first ground part, and a second radiation frequency band is excited.

7. An electronic device, comprising: The electronic device comprises the antenna structure as claimed in any one of claims 1 to 6, and the electronic device communicates with other communication devices by transmitting signals through the antenna structure.

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