CN114865306A

CN114865306A - Electronic equipment

Info

Publication number: CN114865306A
Application number: CN202210442587.6A
Authority: CN
Inventors: 程孝奇
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-08-05
Also published as: WO2023207714A1

Abstract

The application discloses electronic equipment belongs to electronic equipment technical field. The electronic equipment comprises a metal frame body, a metal piece and a first circuit board; the metal frame body is provided with a first broken joint and a second broken joint, the metal frame body is separated into a first frame body and a second frame body by the first broken joint and the second broken joint, the first frame body is provided with at least one feeding point and at least one grounding point, and the second frame body is provided with at least one feeding point and at least one grounding point; the metal piece is positioned in the enclosed area of the metal frame body and is adjacent to the at least one antenna, and a metal piece grounding point is arranged on the metal piece and is electrically connected with the grounding part of the first circuit board through an antenna tuning network.

Description

Electronic equipment

Technical Field

The application belongs to the technical field of electronic equipment, and particularly relates to electronic equipment.

Background

With the development of communication technology, the frequency band and the number of the terminal antenna are increased rapidly, and on the other hand, the number of rear cameras of the terminal is increased, the size of a camera module is correspondingly increased, so that a rear-view metal decoration part is enlarged, and finally, the space for the antenna layout is smaller and smaller; the metal decoration of taking the photograph after is in the grow, and is also more and more near apart from the antenna body, and this just leads to the metal decoration of taking the photograph after to the influence of antenna radiation performance more and more big, and how to reduce the influence of metal decoration to the antenna is a difficult problem that awaits the solution urgently.

Disclosure of Invention

The embodiment of the application aims to provide electronic equipment, and the problem that metal parts have excessive influence on the performance of an antenna in the related technology can be solved.

In a first aspect, an embodiment of the present application provides an electronic device, including:

the circuit board comprises a metal frame body, a metal piece and a first circuit board;

the metal frame body is provided with a first broken joint and a second broken joint, the metal frame body is separated into a first frame body and a second frame body by the first broken joint and the second broken joint, the first frame body is provided with at least one feeding point and at least one grounding point, and the second frame body is provided with at least one feeding point and at least one grounding point;

the metal piece is positioned in the enclosed area of the metal frame body and is adjacent to the at least one antenna, and a metal piece grounding point is arranged on the metal piece and is electrically connected with the grounding part of the first circuit board through an antenna tuning network.

In the embodiment of the application, a metal frame body of an electronic device is divided into a first frame body and a second frame body, and at least one feeding point and a grounding point are respectively arranged on the first frame body and the second frame body.

Drawings

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

fig. 2 is a schematic diagram of radiation efficiency of a first antenna provided in an embodiment of the present application in the presence of a metal part, and in both the case of grounding and the case of no metal part;

fig. 3 is a schematic diagram of radiation efficiency of a third antenna provided in an embodiment of the present application in the presence of a metal part, and in both the case of grounding and the case of no metal part;

fig. 4 is a schematic view of a connection structure between a metal grounding point and a grounding portion of a first circuit board according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of an antenna tuning network according to an embodiment of the present application;

fig. 6 is a schematic diagram of the S parameter of the third antenna provided in the embodiment of the present application in the case where the metal part is grounded directly and grounded through the antenna tuning network;

fig. 7 is a schematic diagram of radiation efficiency of a third antenna provided in an embodiment of the present application in both cases where a metal part is directly grounded and grounded through an antenna tuning network;

FIG. 8 is a schematic view of a slit provided in an embodiment of the present application;

fig. 9 is a schematic current flow diagram before and after a gap is formed in a metal part according to an embodiment of the present disclosure;

fig. 10 is a schematic view of radiation efficiency of a third antenna before and after a gap is formed in a metal part according to an embodiment of the present application;

fig. 11 is a schematic view of another connection structure between a metal grounding part and a grounding part of a first circuit board according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram of another antenna tuning network provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly 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 that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.

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.

The 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.

The embodiment of the application provides an electronic device, and the electronic device comprises a metal frame body, a metal piece and a first circuit board: the metal frame body can be in a closed ring shape, a first broken seam and a second broken seam are formed in the metal frame body, the first broken seam and the second broken seam separate the metal frame body into two mutually independent parts, namely the first frame body and the second frame body are discontinuous, at least one feeding point and at least one grounding point are arranged on the first frame body, at least one feeding point and at least one grounding point are also arranged on the second frame body, at least part of the first frame body is used as a radiation arm of a corresponding antenna, and similarly, at least part of the second frame body is used as a radiation arm of a corresponding antenna; the metal piece is positioned in the enclosed area of the metal frame body, the metal piece is adjacent to the first frame body and the second frame body, namely the distance between the first frame body and the second frame body is relatively short, a certain gap is formed between the first frame body and the second frame body, and the first frame body and the second frame body can be coupled through a broken seam gap; in order to reduce the influence of the metal piece on the nearby antenna, the metal piece grounding point is arranged on the metal piece and is electrically connected with the grounding part arranged on the first circuit board through the antenna tuning network, so that the metal piece grounding point presents different on-off characteristics to the corresponding antenna frequency band by utilizing the tuning function of the antenna tuning network, and the performance influence of the metal piece on the frequency band of the nearby antenna part is weakened.

In this embodiment, optionally, the metal frame may be a metal frame of the electronic device.

In this embodiment of the application, optionally, the first broken seam and the second broken seam may be opened on the same frame of the metal frame body, or may be opened on two frames of the metal frame body respectively.

In the embodiment of the application, the antenna tuning network can perform impedance matching, so that different impedance characteristics are realized.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. As shown in fig. 1, in some embodiments of the present application, an electronic apparatus includes a metal frame, a metal member 5 and a first circuit board 7, wherein the metal frame is provided with a first broken seam 1 and a second broken seam 2, the first broken seam 1 and the second broken seam 2 divide the metal frame into a first frame 3 and a second frame 4, and the metal member 5 is located in a surrounding area of the metal frame. Wherein the first frame 3 is provided with a first feeding point E and a first grounding point F of the first antenna, the arrow pointing to the first feeding point E in fig. 1 represents the feeding signal input of the first antenna, at least part of the first housing 3 acts as the antenna radiating arm of the first antenna, the first housing 3 is further provided with a second feeding point D and a second grounding point G of the second antenna, the arrow in fig. 1 pointing to the second feeding point D represents the feeding signal input of the second antenna, at least part of the first frame 3 also acts as the antenna radiating arm of the second antenna, the second frame 4 is provided with a third feeding point B and a third grounding point a of the third antenna, an arrow pointing to the third feeding point B in fig. 1 represents a feeding signal input of the third antenna, at least a part of the second frame 4 also serves as an antenna radiation arm of the third antenna, and optionally, at least a part of the first frame may also serve as a parasitic radiation arm of the third antenna.

In some embodiments of the present application, optionally, the first grounding point F is grounded through the sixth capacitor C6, and the second grounding point G and the third grounding point a may be directly grounded. The second feeding point D and the second grounding point G are respectively located at two ends of the first frame 3 in the length direction, the first feeding point E and the first grounding point F are located between the second feeding point D and the second grounding point G, and the third feeding point B is located at one end of the second frame 4 close to the first broken seam 1.

In some embodiments of the present application, a length DE between the second feeding point D and the first feeding point E is 13mm to 15mm, a length DF between the second feeding point D and the first ground point F is 30mm to 33mm, a length DG between the second feeding point D and the second ground point G is 43mm to 46mm, a length AC between the third ground point a and an end point of the second frame 4 near the first slit 1 is 14mm to 15mm, and a length BC between the third feeding point B and an end point of the second frame 4 near the first slit 1 is 3mm to 4 mm.

In some embodiments of the present application, the sixth capacitor C6 has a size of 10pF, and the feed of the first antenna may be connected in series with a capacitor to isolate the second antenna, and the feed of the second antenna may be connected in series with an inductor to isolate the first antenna.

In some embodiments of the application, one of the first antenna, the second antenna, and the third antenna is a GPS antenna, the operating frequency band supports GPS L1 and GPS L5 frequency bands, one is an NFC antenna, the operating frequency band supports a frequency band corresponding to NFC, the remaining one is a WiFi antenna, and the operating frequency band supports WiFi 2.4G and WiFi5G frequency bands. Specifically, the first antenna may be a GPS antenna, the second antenna may be an NFC antenna, and the third antenna may be a WiFi antenna. Of course, it can be understood that the antenna type in the embodiment of the present application is not limited to the above type, and may also be an antenna supporting 4G and 5G operating frequency bands, which is not described herein again.

In some embodiments of the present application, the metal piece 5 is made of aluminum alloy or the like, the distance L1 between the shape of the metal piece 5 and the first frame 3 of the metal frame is 4mm to 6mm, and the distance L2 between the shape of the metal piece 5 and the second frame 4 of the metal frame is 2.2mm to 3.3mm, which means that the distance between the metal piece 5 and the metal frame is relatively short, i.e. the distance between the metal piece 5 and the antenna is relatively short. Optionally, the metal piece 5 is rectangular.

In other embodiments of the present application, the electronic device further includes a camera module 6, and a mounting hole 16 is correspondingly formed in the metal piece 5, the camera module 6 is disposed in the mounting hole 16, wherein the camera module 6 is the rear camera module 6, that is, the metal device of the rear camera is the metal device of the metal piece 5.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic diagram of radiation efficiency of a first antenna in the presence of a metal element and grounding and in the absence of the metal element according to an embodiment of the present application, and fig. 3 is a schematic diagram of radiation efficiency of a third antenna in the presence of a metal element and grounding and in the absence of the metal element according to an embodiment of the present application. In fig. 2, the dotted line is the radiation efficiency of the first antenna when the metal part 5 does not exist, and the solid line is the radiation efficiency of the first antenna when the metal part 5 exists and the first antenna is grounded, so that after the metal part 5 is additionally installed and grounded, the influence on the L1/L5 frequency band of the first antenna is relatively small, and is about 0.3 dB; in fig. 3, the dotted line is the radiation efficiency of the third antenna when the metal piece 5 is absent, the solid line is the radiation efficiency of the third antenna when the metal piece 5 is present and the third antenna is grounded, as can be seen from fig. 3, after the metal piece 5 is additionally installed and grounded, the influence on the WiFi 2.4G frequency band of the third antenna is about 0.5dB, while the influence on WiFi 5.1G is 0.9dB at most, and the influence on WiFi 5.8G is 1.3dB at most, generally, the influence on the performance of the third antenna is large under the condition that the metal piece 5 is additionally installed and the third antenna is grounded, and if the second antenna is an NFC antenna, the influence on the second antenna can be disregarded because the working frequency is low. The above-described grounding is a direct grounding, and is not grounded via the antenna tuning network 11.

In the related art, for the antenna on the metal frame, the traditional optimization scheme is based on the antenna itself, and the size and the clearance are optimized, but when the antenna scheme is fixed, the space which can be optimized by the antenna itself is little due to the limitation of the whole layout stack. In the embodiment of the present application, starting from the surrounding environment that affects the performance of the antenna, that is, considering that the grounding of the metal piece 5 is changed, the metal piece 5 is grounded through the antenna tuning network 11, and the tuning function of the antenna tuning network 11 is utilized to enable the grounding point of the metal piece to present different on-off characteristics to the corresponding antenna frequency band, so as to weaken the performance impact of the metal piece 5 on the frequency band of the nearby antenna part.

In the embodiment of the present application, the number of the metal grounding points on the metal part 5 is at least one, and at least one metal grounding point is connected to the grounding portion 72 of the first circuit board 7 through the antenna tuning network 11. That is, the number and the position of the antennas can be flexibly improved according to actual needs, a metal grounding point is arranged at a position adjacent to the metal 5, the metal grounding point is grounded through the antenna tuning network 11, and the effect of improving the performance of the antenna can be realized through the tuning function of the antenna tuning network 11. Optionally, an antenna tuning network 11 is correspondingly connected to one metal grounding point.

In some embodiments of the present application, optionally, the number of the metal grounding points is 4, where one metal grounding point is electrically connected to the grounding portion 72 of the first circuit board 7 through the antenna tuning network 11, and the other three metal grounding points are directly electrically connected to the grounding portion 72 of the first circuit board 7. It is found through analysis that the metal part ground point close to the antenna is more critical to the performance of the antenna, and therefore, optionally, the metal part ground point connected to the antenna tuning network 11 is located in an area on the metal part 5 close to the first antenna and/or the third antenna, specifically, the metal part ground point connected to the antenna tuning network 11 is disposed near the first gap 1, or the distance between the metal part ground point connected to the antenna tuning network 11 and the first gap 1 is smaller than a predetermined threshold, so as to ensure the effect of reducing the influence of the metal part 5. That is to say, the grounding point of the metal component connected to the antenna tuning network 11 is generally close to the first broken joint 1, and this scheme generally has a better improvement effect on high frequency than on low frequency, because the high frequency has strong directivity, under a specific condition, such as near the first broken joint 1, the coupling (shown as performance absorption) between the radiation field of the antenna and the metal component 5 in some frequency bands is changed by changing the grounding state, the frequency band of the first antenna is L1+ L5, which is farther from the metal frame, the overall influence (about 0.3 dB) is small after the metal component 5 is directly grounded, the coupling and absorption of energy is also small, and then, the grounding state is changed by a certain point on the metal component 5, which generally has a certain effect.

As shown in fig. 1, the metal grounding points include a first metal grounding point G1, a second metal grounding point G2, a third metal grounding point G3 and a fourth metal grounding point G4, the metal grounding point connected to the antenna tuning network 11 is a first metal grounding point G1, and the first metal grounding point G1 is disposed near the first gap 1.

Referring to fig. 4, fig. 4 is a schematic view of a connection structure between a metal grounding part and a grounding part of a first circuit board according to an embodiment of the present disclosure. As shown in fig. 4, in the embodiment of the present invention, the first circuit board 7 is located below the metal element 5, the first antenna clearance area 70 is disposed on the first circuit board 7, the grounding elastic sheet 10 is disposed on the first antenna clearance area 70, the metal element grounding point is electrically connected to the grounding elastic sheet 10, the grounding elastic sheet 10 is electrically connected to the first end 110 of the antenna tuning network 11, and the second end 111 of the antenna tuning network 11 is electrically connected to the grounding portion 72 of the first circuit board 7. The specific connection mode between the metal piece grounding point and the grounding elastic sheet 10 is as follows: the grounding point of the metal piece is connected with a steel sheet 9 through a locking screw 8, and the steel sheet 9 is connected with a grounding elastic sheet 10. Optionally, the first circuit board 7 is further provided with a second antenna clearance area 71, and the first antenna clearance area 70 and the second antenna clearance area 71 cannot be completely copper-plated, and may be made of FR4 or the like; the grounding portion 72 of the first circuit board 7 is formed by a copper-clad area.

In some embodiments of the present application, the electronic apparatus further includes a second circuit board 101, and the grounding portion 72 of the first circuit board 7 is electrically connected to the grounding portion 72 of the second circuit board 101 through the connector 12.

In some embodiments of the present application, the antenna tuning network 11 is an LC circuit, i.e. a tuning circuit composed of a capacitor and an inductor.

Referring to fig. 5, fig. 5 is a schematic diagram of an antenna tuning network according to an embodiment of the present application. As shown in fig. 5, the antenna tuning network 11 in the embodiment of the present application is an LC circuit, and the LC circuit includes a first inductor L1, a first capacitor C1, and a second capacitor C2, where the first inductor L1 and the first capacitor C1 are connected in series and then connected in parallel with the second capacitor C2. Specifically, the first terminal 110 of the antenna tuning network 11 is connected to the first terminal of the first inductor L1 and the first terminal of the second capacitor C2, respectively, the second terminal of the first inductor L1 is connected to the first terminal of the first capacitor C1, and the second terminal 111 of the antenna tuning network 11 is connected to the second terminal of the first capacitor C1 and the second terminal of the second capacitor C2, respectively. One end of the first end 110 and the second end of the antenna tuning network 11 is connected to the grounding elastic sheet 10, and the other end is connected to the grounding part 72 of the first circuit board 7.

In some embodiments of the present application, optionally, the size of the first inductor L1 is 2nH to 3nH, the size of the first capacitor C1 is 3.9pF to 4.7pF, and the size of the second capacitor C2 is 2.4pF to 3 pF.

Referring to fig. 6 and 7, fig. 6 is a schematic diagram of the S parameter of the third antenna provided in this embodiment of the present application in the case where the metal part is directly grounded and the third antenna is grounded through the antenna tuning network, and fig. 7 is a schematic diagram of the radiation efficiency of the third antenna provided in this embodiment of the present application in the case where the metal part is directly grounded and the third antenna is grounded through the antenna tuning network. The dotted line in fig. 6 is the S-parameter curve of the third antenna in the case where the metallic article 5 is directly grounded, and the solid line is the S-parameter curve of the third antenna in the case where the metallic article 5 is grounded through the antenna tuning network 11; the dotted line in fig. 7 is the radiation efficiency curve of the third antenna in the case where the metallic piece 5 is directly grounded, and the solid line is the radiation efficiency curve of the third antenna in the case where the metallic piece 5 is grounded through the antenna tuning network 11.

The operation of the antenna tuning network 11 is described below with reference to fig. 6 and 7.

In the embodiment of the present application, the antenna tuning network 11 presents a large capacitance to the L1/L5 frequency band of the first antenna, which is similar to a short circuit, and at this time, the influence on the first antenna is small, and at this time, compared with a scheme in which a metal grounding point is directly grounded, the efficiency of the first antenna under the two schemes is almost the same; the antenna tuning network 11 presents a large inductance to the WiFi 2.4G of the third antenna, which is approximately open-circuit, and presents a small capacitance of 2pF to 3pF to the WiFi5G of the third antenna, at this time, compared with the scheme of directly grounding the metal piece grounding point, the difference of the S parameter of the third antenna is not large, but the scheme of grounding the antenna tuning network 11 is adopted to improve the average efficiency of the WiFi 2.4G of the third antenna by about 0.5dB, the bandwidth is widened, and the efficiency of the WiFi5.15 to 5.55G is improved by about 0.6 dB. Therefore, in the embodiment of the present application, the metal piece grounding point is arranged in the area close to the antenna on the metal piece 5, and is grounded through the antenna tuning network 11, so that different frequency bands of different antennas have different capacitance or inductance characteristics, thereby reducing the influence of the metal piece 5 on the surrounding specific antenna frequency band, and achieving the purpose of optimizing the antenna performance.

In some embodiments of the present application, a gap 13 is provided in a region of the metal member 5 adjacent to the third antenna, or a portion of the metal member 5 adjacent to the third grounding point a of the second frame 4 to the first broken seam 1 and a region of the metal member 5 adjacent to the first frame 3 are provided with gaps 13, and a shape of the gap 13 corresponds to a shape formed by the portion of the second frame 4 from the third grounding point a to the first broken seam 1 and the second frame 2. That is, a slit 13 penetrating the plane of the metal member 5 is opened in a region of the metal member 5 close to the third antenna, and the cross-sectional shape of the slit 13 is determined according to the shape of the third antenna. Optionally, the third antenna is an L-shaped antenna, that is, the third antenna includes a radiating arm AC section and a parasitic radiating arm DG section, which together form an L-shape, and the shape of the slot 13 may be correspondingly set to an L-shape. Optionally, the gap 13 is further filled with an insulating medium, which may be plastic or the like, and the outer surface of the metal piece 5 is covered with a decorative glass or ceramic material.

Referring to fig. 8, fig. 8 is a schematic view of a slit according to an embodiment of the present disclosure. As shown in fig. 8, in the embodiment of the present application, the shape of the slit 13 may be an L shape, where the L shape includes two sections, namely a narrow section and a wide section, the narrow section has a width W1 of 1mm to 1.5mm and a length of 9mm to 11mm, and the wide section has a width W2 of 2mm to 2.5mm and a length of 9mm to 11 mm.

Referring to fig. 9, fig. 9 is a schematic current flow diagram before and after the metal piece 5 is provided with the gap 13 according to the embodiment of the present application. As shown in fig. 9, through research and analysis by the inventors, it is found that the wifi 5.15-5.55G frequency bands of the third antenna have strong electric field coupling in the area (i.e., the portion enclosed by the dashed line frame in fig. 9) on the metal piece 5 close to the antenna, so that a part of the antenna radiation energy is bound at this position, and the radiation efficiency of the corresponding frequency band of the third antenna is low. In the embodiment of the present application, the gap 13 is formed in the region of the metal piece 5 that generates strong electric field coupling to some frequency bands of the antenna, so that the current and electric field distribution at the region can be changed. In fig. 9, the dashed arrows represent the current directions, and for example, with the resonant frequency of 5.25GHz, before the slot 13 is opened, there are reverse currents at the first position E1 and the second position E2 on the metal piece 5, that is, there are two large electric field couplings; after the slot 13 is opened, only the reverse current exists at the third position E3, that is, only one large electric field coupling point exists, that is, after the slot 13 is opened, the electric field coupling of the third antenna and the metal piece 5 in the frequency band is correspondingly weakened, so that the influence of the metal piece 5 on the performance of the antenna in the specific frequency band is weakened.

Referring to fig. 10, fig. 10 is a schematic view of the radiation efficiency of the third antenna before and after the metal element is provided with the slot according to the embodiment of the present application. As shown in fig. 10, it can be seen from the comparative radiation efficiency curve that after the slot 13 is opened, the radiation efficiency of the wifi 5.15-5.55G frequency band of the third antenna can be improved by 0.5dB on average.

In some embodiments of the present application, optionally, the shape of the slot 13 may be determined according to the shape of the antenna with stronger coupling effect on the metal piece 5 in all antennas. For example, if the third antenna is formed by branches of an L shape, the slot 13 may be shaped to correspond to the third antenna, i.e., to present an L shape.

In other embodiments of the present application, the antenna tuning network 11 is an antenna tuner.

Referring to fig. 11 and 12, fig. 11 is a schematic view of a connection structure between a ground point of another metal element and a ground point of a first circuit board according to an embodiment of the present disclosure, and fig. 12 is a schematic view of another antenna tuning network according to an embodiment of the present disclosure. The connection between the metal grounding part and the grounding part 72 of the first circuit board 7 in fig. 11 is different from that in fig. 4 only in the structure of the antenna tuning network 11, and reference may be made to the above description for details, which is not repeated herein.

As shown in fig. 12, the antenna tuning network 11 includes a switch 112, a second inductor L2, a third inductor L3, a fourth inductor L4, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5, wherein the first end 110 of the antenna tuning network 11 is electrically connected to the first end of the second inductor L2, the first end of the third inductor L3, the first end of the fourth inductor L4, the first end of the fourth capacitor C4, and the first end of the fifth capacitor C5 through the switch 112, the second end of the second inductor L2 is connected to the first end of the third capacitor C3, and the second end 111 of the antenna tuning network 11 is connected to the second end of the third capacitor C3, the second end of the third inductor L3, the second end of the fourth inductor L4, the second end of the fourth capacitor C4, and the second end of the fifth capacitor C5. In the embodiment of the present application, the antenna tuning network 11 can be switched to different LC circuits, L circuits, C circuits, or a parallel combination of the above circuits through the switch 112, so that the ground state of the metal grounding point on the metal piece 5 can be flexibly adjusted, and not only the function of optimizing the performance of a specific antenna frequency band can be achieved, but also the function of tuning noise generated by the metal piece 5 can be achieved. That is to say, when the antenna works in a specific frequency band, different capacitance or inductance characteristics are constructed by switching the switch 112, and noise waves are shifted out of the frequency band of the interference antenna, so that the performance of a part of the frequency band of the antenna is optimized. Moreover, the impedance matching adjustment range is wider, so that the antenna capable of improving the performance is not limited to a GPS frequency band, an NFC operating frequency band, a WiFi frequency band, and the like, and the improvement of frequency bands such as MHB, N78, N79, and the like can be realized.

In the embodiment of the application, a metal frame body of the electronic device is divided into a first frame body and a second frame body, and at least one feeding point and a grounding point are respectively arranged on the first frame body and the second frame body, because the metal piece is positioned in a surrounding area of the metal frame body and is adjacent to at least one antenna, the grounding point of the metal piece is arranged on the metal piece, and the grounding point of the metal piece is electrically connected with the grounding part of the first circuit board through an antenna tuning network, so that the tuning function of the antenna tuning network can be utilized to enable the grounding point of the metal piece to present different on-off characteristics to the corresponding antenna frequency band, and the performance influence of the metal piece on the frequency dividing section of the nearby antenna part is weakened; moreover, holes are formed in the metal piece at proper positions to change the distribution of current and electric field in a partial area close to the antenna, so that the influence of the metal piece body on a specific frequency band of the antenna can be weakened, and the performance of the antenna is improved.

The electronic device in the embodiment of the present application may be a terminal, or may be other devices besides the terminal. The electronic Device may be, for example, a Mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic Device, a Mobile Internet Device (MID), an Augmented Reality (AR)/Virtual Reality (VR) Device, a robot, a wearable Device, an ultra-Mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and may also be a personal computer (personal computer, PC), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not particularly limited.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An electronic device is characterized by comprising a metal frame body, a metal piece and a first circuit board;

the metal frame body is provided with a first broken joint and a second broken joint, the first broken joint and the second broken joint separate the metal frame body into a first frame body and a second frame body, the first frame body is provided with at least one feeding point and at least one grounding point, and the second frame body is provided with at least one feeding point and at least one grounding point;

the metal piece is positioned in the enclosed area of the metal frame body and is adjacent to the first frame body and the second frame body, and a metal piece grounding point is arranged on the metal piece and is electrically connected with the grounding part of the first circuit board through an antenna tuning network.

2. The electronic device according to claim 1, wherein the first chassis is provided with a first feeding point and a first grounding point of the first antenna, the first chassis is further provided with a second feeding point and a second grounding point of the second antenna, and the second chassis is provided with a third feeding point and a third grounding point of the third antenna.

3. The electronic device according to claim 2, wherein the first grounding point is grounded via a sixth capacitor, the second feeding point and the second grounding point are respectively located at two ends of the first frame body in the length direction, the first feeding point and the first grounding point are located between the second feeding point and the second grounding point, and the third feeding point is located at one end of the second frame body close to the first slit.

4. The electronic apparatus according to claim 3, wherein a region of the metal member adjacent to the third antenna is provided with a slit having a shape corresponding to a shape of a combination of a portion of the second frame body from the third ground point to the first broken line and the first frame body.

5. The electronic device of claim 4, wherein the slot is L-shaped.

6. The electronic device of claim 4, wherein the slot is filled with an insulating medium.

7. The electronic device of claim 1, wherein an antenna clearance area is disposed on the first circuit board, a ground spring is disposed on the antenna clearance area, the metal grounding point is electrically connected to the ground spring, the ground spring is electrically connected to a first end of the antenna tuning network, and a second end of the antenna tuning network is electrically connected to a ground of the first circuit board.

8. The electronic device of claim 1, wherein the antenna tuning network is an LC circuit, the LC circuit comprising a first inductor, a first capacitor, and a second capacitor, the first inductor and the first capacitor being connected in series and then connected in parallel with the second capacitor.

9. The electronic device of claim 1, wherein the antenna tuning network comprises a switch, a second inductor, a third inductor, a fourth inductor, a third capacitor, a fourth capacitor, and a fifth capacitor, wherein a first end of the antenna tuning network is electrically connected to a first end of the second inductor, a first end of the third inductor, a first end of the fourth capacitor, and a first end of the fifth capacitor through the switch, a second end of the second inductor is connected to a first end of the third capacitor, and a second end of the antenna tuning network is connected to a second end of the third capacitor, a second end of the third inductor, a second end of the fourth capacitor, and a second end of the fifth capacitor.

10. The electronic device of claim 2, wherein the first antenna is a GPS antenna, the second antenna is an NFC antenna, and the third antenna is a WiFi antenna.

11. The electronic device of claim 1, further comprising a camera module, wherein the metal member has a mounting hole, and the camera module is disposed in the mounting hole.