Electronic device

Abstract

The utility model discloses an electronic device. The electronic equipment comprises a middle frame, a circuit board, a first radiator, a second radiator and a parasitic branch knot. The circuit board is located in the middle frame. The first radiator is arranged on the middle frame, and the first radiator is provided with a first feeding point and a first grounding point; the second radiator is arranged on the middle frame, the second radiator and the first radiator are arranged at an interval, the second radiator is provided with a second feeding point and a second grounding point, and a breaking joint is formed between one end, close to the first feeding point, of the second radiator and one end, close to the first feeding point, of the first radiator; the parasitic branch is arranged on the surface, deviating from the screen of the electronic equipment, of the circuit board and is coupled with the second radiator. According to the electronic equipment provided by the invention, the current distribution is dispersed through the current guiding function of the parasitic branch knot, the SAR value of the antenna is effectively reduced, and the working performance of the antenna of the electronic equipment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to an electronic equipment. Background Art

[0002] With the continuous development of communication technology, the antennas of electronic devices need to cover more and more frequency bands, which means that the number of antennas of electronic devices is increasing, and at the same time, users' communication experience with mobile phones is getting higher and higher. The antennas of electronic devices usually transmit electromagnetic waves at a higher power. The electromagnetic radiation energy absorbed by the user can be measured by the SAR (Specific Absorption Rate) value. The SAR value can be used to quantify and measure the radiation of electronic devices such as smartphones. By measuring the SAR value of electronic devices, it can be determined whether the impact of the radiation of electronic devices on the human body meets the standards. The larger the SAR value, the greater the impact of the radiation of the electronic device on the human body, and vice versa.

[0003] In the related technologies, since excessive SAR values ​​will have certain impacts on human health, governments and telecommunications regulatory agencies of various countries have issued corresponding regulations on SAR values. Among them, the size of the SAR value is closely related to the transmission power of the electronic device. In order to make the SAR value comply with the regulations, the current solution to reduce the SAR value is usually to directly reduce the conducted power to achieve the purpose of reducing SAR. However, this will sacrifice more antenna performance, thus affecting the user experience.

[0004] Therefore, it is particularly important to have an antenna shape that can control the SAR value within a reasonable range while ensuring the antenna performance of the electronic device. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide an electronic device, aiming to solve the technical problem in the prior art that the antenna performance cannot be guaranteed while reducing SAR.

[0006] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0007] An embodiment of the present application provides an electronic device, including:

[0008] Middle frame;

[0009] A circuit board, located in the middle frame;

[0010] A first radiator is disposed on the middle frame, wherein the first radiator has a first feeding point and a first grounding point;

[0011] a second radiator, disposed on the middle frame and spaced apart from the first radiator, the second radiator having a second feeding point and a second grounding point, and a gap formed between an end of the second radiator close to the first feeding point and an end of the first radiator close to the first feeding point;

[0012] A parasitic branch is arranged on a side of the circuit board away from the screen of the electronic device, and the parasitic branch is coupled to the second radiator.

[0013] The present application proposes an electronic device, in which a first radiator and a second radiator are spaced apart on a middle frame, and the first radiator and the second radiator are arranged opposite to each other, that is, a first feeding point and a second feeding point are arranged opposite to each other. At the same time, a parasitic branch is arranged on a side away from a screen of the electronic device, and the parasitic branch is coupled to the second radiator. The current guiding function of the parasitic branch is used to disperse the distribution of the current, thereby effectively reducing the SAR value of the antenna and improving the working performance of the antenna of the electronic device.

[0014] In one of the embodiments, the parasitic branch is arranged on a side close to the back cover, and the parasitic branch can be reused as an NFC antenna or a light strip.

[0015] In one of the embodiments, the electronic device further includes: a light strip, at least a portion of which is located in a region close to the NFC antenna, and the light strip is electrically connected to the circuit board.

[0016] In one embodiment, the light strip is arranged on the circuit board in a ring shape along the circumference of the NFC antenna.

[0017] In one of the embodiments, a magnetic isolation portion is provided on the circuit board, and the magnetic isolation portion is provided between the light strip and the NFC antenna.

[0018] In one of the embodiments, a switch circuit is provided on the circuit board, and the switch circuit is electrically connected to the parasitic branch. When the light strip is in operation, the switch circuit is configured to increase the signal receiving and transmitting power of the parasitic branch.

[0019] In one of the embodiments, the electronic device further comprises: a ground plane, wherein a current direction of the ground plane is opposite to a current direction of the parasitic branch.

[0020] In one embodiment, the first radiator is a coupling branch, the second radiator is a feeding branch, and the gap is formed between the coupling branch and the feeding branch.

[0021] In one embodiment, the electronic device further includes: a matching circuit, the matching circuit being electrically connected to the parasitic branch and being used to adjust the resonance generated by the parasitic branch.

[0022] In one embodiment, the parasitic branch is electrically connected to the circuit board through a flexible circuit board.

[0023] In one embodiment, the electronic device further includes: an NFC chip, which is disposed on the circuit board and electrically connected to the NFC antenna, the NFC chip including a first differential signal terminal and a second differential signal terminal, the first differential signal terminal is electrically connected to the first radiator, and the second differential signal terminal is electrically connected to the parasitic branch.

[0024] In one embodiment, the light strip and the first radiator are separated from each other by a first dielectric isolation portion, and the light strip and the second radiator are separated from each other by a second dielectric isolation portion.

[0025] In one embodiment, there is a distance D between the light strip and the second radiator;

[0026] Satisfies the relationship: 0<D≤3mm.

[0027] In one of the embodiments, the electronic device further includes a transparent back cover, wherein the transparent back cover is connected to the middle frame, the transparent back cover integrally covers a side of the electronic device facing away from the screen, and the light strip is visible through the transparent back cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the exploded structure of an electronic device in one embodiment of the present application is shown;

[0030] Figure 2 The antenna structure of an electronic device in one embodiment of the present application is shown in FIG. Figure 1 ;

[0031] Figure 3 The antenna structure of an electronic device in one embodiment of the present application is shown in FIG. Figure 2 ;

[0032] Figure 4 The antenna structure of the electronic device in another embodiment of the present application is shown in FIG. Figure 1 ;

[0033] Figure 5The antenna structure of the electronic device in another embodiment of the present application is shown in FIG. Figure 2 ;

[0034] Figure 6 Shows Figure 2 A schematic diagram comparing the S-parameter simulation effects of the antenna of the electronic device in the figure and the antenna in the related art;

[0035] Figure 7 Shows Figure 2 A schematic diagram comparing the efficiency simulation results of the antenna of the electronic device in the figure with those of the antenna in the related art;

[0036] Figure 8 A schematic diagram of the antenna structure of an electronic device in another embodiment of the present application is shown;

[0037] Fig. 9 Shows Figure 8 Schematic diagram of current flow in the medium;

[0038] Fig.10 A schematic diagram showing a contact terminal network in one embodiment of the present application Figure 1 ;

[0039] Fig.11 A schematic diagram showing a contact terminal network in one embodiment of the present application Figure 2 ;

[0040] Fig.12 A schematic diagram showing a contact terminal network in one embodiment of the present application Figure 3 ;

[0041] Fig.13 A schematic diagram showing a contact terminal network in one embodiment of the present application Figure 4 ;

[0042] Fig.14 A schematic diagram of a feeding network in one embodiment of the present application is shown;

[0043] Fig.15 A schematic diagram of a PCB routing network in one embodiment of the present application is shown;

[0044] Fig.16 A schematic diagram of antenna signal current distribution of a conventional electronic device in the related art is shown;

[0045] Fig.17 A schematic diagram of antenna signal current distribution of an electronic device in one embodiment of the present application is shown;

[0046] Fig.18 A schematic diagram of antenna signal current distribution of an electronic device in another embodiment of the present application is shown;

[0047] Fig.19 Shows Figure 8 A schematic diagram comparing the S-parameter simulation effects of the antenna of the electronic device in the figure and the antenna in the related art;

[0048] Fig. 20 Shows Figure 8 A schematic diagram comparing the efficiency width simulation effect of the antenna of the electronic device in the figure and the antenna in the related art;

[0049] Fig.21 Shows Figure 8 A schematic diagram comparing the radiation efficiency simulation results of the antenna of the electronic device in the figure and the antenna in the related art;

[0050] Fig. 22 Shows Figure 8 A schematic diagram of the simulation effect when the feed matching circuit of the antenna of the electronic device is used without matching;

[0051] Fig.23 Shows Figure 8 A schematic diagram of the simulation effect when the ground matching circuit of the antenna of the electronic device is used without matching;

[0052] Fig.24 A schematic diagram of the structure of an electronic device in an embodiment of the present application is shown.

[0053] Description of main component symbols:

[0054] 10-electronic device; 110-middle frame; 111-break; 120-first radiator; 120a-coupling branch; 121-first feeding point; 122-first grounding point; 130-second radiator; 130a-feeding branch; 131-second feeding point; 132-second grounding point; 140-parasitic branch; 1401-third grounding point; 150-circuit board; 151-bracket; 160-NFC chip; 161-NFC antenna; 162-first differential signal end; 163-second differential signal end; 164-first bracket wiring; 165-second bracket wiring; 170-light strip; 180-screen; 190-transparent back cover;

[0055] 200-feeding network; 2001-antenna matching network; 2002-RF circuit; 2003-RF chip; 201-contact terminal; 202-contact terminal network; 2021-cellular matching circuit; 203-PCB routing network; 2031-first matching network; 2032-second matching network; 2033-PCB routing. DETAILED DESCRIPTION

[0056] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] As used herein, "electronic device 10" (or simply "terminal") includes, but is not limited to, a device configured to receive / send communication signals via a wireline connection (such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and / or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communication capabilities; PDAs (personal digital assistants) that can include radio telephones, pagers, Internet / intranet access, web browsers, notepads, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radio telephone transceivers. A mobile phone is an electronic device 10 configured with a cellular communication module. The form of the electronic device 10 is not specifically limited in the embodiments of the present application.

[0062] In the related art, since an excessive SAR value will have a certain impact on human health, government departments, telecommunication regulatory agencies, etc. of various countries have issued corresponding regulations on SAR values. Among them, the size of the SAR value is closely related to the transmission power of the electronic device 10. In order to make the SAR value comply with the regulations, the current solution to reduce the SAR value is usually to directly reduce the conducted power to achieve the purpose of reducing SAR. However, this will sacrifice more antenna performance, thereby affecting the user experience.

[0063] like Figure 1 As shown, in order to solve the above technical problems, an embodiment of the present application provides an electronic device 10, which is not limited to a mobile phone, a tablet computer, a laptop computer, a wearable device, etc.

[0064] like Figure 2 and Figure 4 As shown, the electronic device 10 includes a middle frame 110 , a circuit board 150 , a first radiator 120 , a second radiator 130 and a parasitic branch 140 .

[0065] Combination Figure 3 and Figure 5As shown, the circuit board 150 is located in the middle frame 110. The first radiator 120 is arranged on the middle frame 110, and the first radiator 120 has a first feeding point 121 and a first grounding point 122; the second radiator 130 is arranged on the middle frame 110 and is spaced apart from the first radiator 120, and the second radiator 130 has a second feeding point 131 and a second grounding point 132, and a gap 111 is formed between an end of the second radiator 130 close to the first feeding point 121 and an end of the first radiator 120 close to the first feeding point 121. In this way, the first radiator 120 and the second radiator 130 are arranged opposite to each other, and the first feeding point and the second feeding point are opposite to each other, so that the first radiator 120 and the second radiator 130 form a mouth-to-mouth slot antenna.

[0066] The parasitic branch 140 is disposed on a side of the circuit board 150 away from the screen 180 of the electronic device 10 , and the parasitic branch 140 is coupled to the second radiator 130 .

[0067] Exemplarily, the parasitic branch 140 has a third grounding point 1401 , and the third grounding point 1401 is disposed close to an end of the second radiator 130 away from the first radiator 120 .

[0068] Combination Figure 6 , Figure 7 As shown, in the related art, the current distribution of the antenna signal of the traditional electronic device is as follows Fig.16 As shown, the current of the antenna signal only has the current path 4001. In the embodiment of the present application, after adding the parasitic branch 140, the current path distribution of the antenna signal is as follows: Fig.17 and Fig.18 As shown, there are current paths 4001 and 4002 , which are more numerous and have a wider current distribution than in the related art, thus achieving a better SAR reduction effect.

[0069] Combination Figures 19 to 21 As shown, in this embodiment, a parasitic branch 140 is provided on a side facing away from the screen 180 of the electronic device 10, so that the parasitic branch 140 is coupled to the second radiator 130. The current guiding function of the parasitic branch 140 is used to disperse the current distribution, thereby effectively reducing the antenna SAR value and improving the working performance of the antenna of the electronic device 10.

[0070] It should be noted that the middle frame 110 mainly plays a supporting role for the entire electronic device 10. The middle frame 110 may include a frame, and the frame may be formed of a conductive material such as metal. The frame may extend around the periphery of the electronic device 10 and the display screen, and the frame may specifically surround the four sides of the display screen to help fix the display screen. In one implementation, the frame made of a metal material may be directly used as a metal frame of the electronic device 10, forming the appearance of a metal frame. In other embodiments, the outer surface of the frame may also be a non-metallic material, such as a plastic frame, to form the appearance of a non-metallic frame.

[0071] like Figure 8 As shown, in one embodiment, the electronic device 10 further includes an NFC (Near Field Communication, NFC) antenna, and the NFC antenna 161 is disposed on a side of the circuit board 150 away from the screen 180. By disposing the NFC antenna 161, the electronic device 10 has an NFC function.

[0072] The parasitic branch 140 is disposed on a side close to the back cover, and the parasitic branch 140 can be reused as an NFC antenna 161 or a light strip 170. Exemplarily, the back cover can be a transparent back cover 190.

[0073] Exemplarily, the parasitic branch 140 is the NFC antenna 161. In this way, the NFC antenna 161 is used as the parasitic branch 140 to further disperse the distribution of the current, and the two cooperate with each other to effectively reduce the antenna SAR.

[0074] In one embodiment, the electronic device 10 further includes a light strip 170, at least a portion of which is located in a region close to the NFC antenna and the light strip 170 is electrically connected to the circuit board 150. In this embodiment, the light strip 170 can be used to display the state of the NFC antenna 161, that is, the control circuit of the circuit board 150 controls the circuits connected to the light strip 170 and the NFC antenna 161.

[0075] It should be noted that if Fig.24 As shown, the NFC antenna and the light strip 170 are both Fig.24 The upper right corner area shown, therefore, the light strip should maintain a certain distance from the antenna.

[0076] like Figure 3 and Figure 4 As shown, exemplarily, the parasitic branch 140 is the light strip 170. By using the light strip 170 as the radiation branch of the antenna, that is, the parasitic branch 140 of the antenna, a reverse current is formed on the ground plane, thereby achieving local current cancellation, reducing the total electric field of the antenna of the electronic device 10, and making the antenna have low SAR characteristics while ensuring the antenna efficiency.

[0077] In one embodiment, a magnetic isolation portion is provided on the circuit board 150, and the magnetic isolation portion is provided between the light strip 170 and the NFC antenna 161. In this embodiment, the light strip 170 and the NFC antenna 161 are separated by the provision of the magnetic isolation portion, so as to avoid the influence of the electromagnetic field on the light strip 170 and the NFC antenna 161, thereby affecting the antenna performance of the electronic device 10.

[0078] In one embodiment, a switch circuit is provided on the circuit board 150, and the switch circuit is electrically connected to the parasitic branch 140. When the light strip 170 is in operation, the switch circuit is configured to increase the signal receiving and transmitting power of the parasitic branch 140. In this way, the antenna performance of the electronic device 10 is improved, and the influence of the light strip 170 on the antenna performance is avoided.

[0079] In one embodiment, the electronic device 10 further includes a ground plane, and the current direction of the ground plane is opposite to the current direction of the parasitic branch 140. A current opposite to the current of the parasitic branch 140 is formed on the ground plane to achieve local current cancellation and reduce the total electric field of the antenna of the electronic device 10. In this way, the SAR of the antenna is reduced while ensuring the antenna efficiency.

[0080] like Figure 8 As shown, in one embodiment, the first radiator 120 is a coupling branch 120a, the second radiator 130 is a feeding branch 130a, and the coupling branch 120a and the feeding branch 130a form the break 111. The radiator is fixed in the electronic device 10 by filling with plastic particles, so that it forms a complete structural part with the middle frame 110. Of course, in other embodiments, the break 111 can also be filled with an air layer or a vacuum layer, or other non-metallic material layers.

[0081] like Fig.14 As shown, the antenna feeding network 200 includes an antenna matching network 2001, a radio frequency circuit 2002, and a radio frequency chip 2003. The antenna matching network 2001, the radio frequency circuit 2002, and the radio frequency chip 2003 are all located on the circuit board 150, and the cellular signal is fed into the feeding branch 130a through the contact terminal 201.

[0082] In one embodiment, the electronic device 10 further includes a matching circuit, which is electrically connected to the parasitic branch 140 and is used to adjust the resonance generated by the parasitic branch 140. In this embodiment, the matching circuit is used to match the impedance of the antenna. Exemplarily, the matching circuit can use capacitors and inductors, or can use radio frequency switches plus capacitors and inductors. The matching circuit adjusts the shunting effect of the parasitic branch 140 and the frequency of the parasitic resonance, and can be a static matching network composed of only capacitors and inductors, or a dynamic matching network composed of radio frequency switches plus capacitors and inductors.

[0083] The matching circuit of the parasitic branch 140 may be a static matching network or a dynamic matching network, which is connected to the coupling branch 120 a via the contact terminal 201 to adjust the state of the coupling branch 120 a.

[0084] like Fig. 22 and Fig.23 As shown, when the matching circuit uses different matching, the resonance generated by the feeding branch 130a can move to a low frequency or a high frequency, while the resonance generated by the coupling branch 120a does not move substantially.

[0085] In one embodiment, illustratively, the parasitic stub 140 may be electrically connected to the circuit board 150 via a flexible circuit board.

[0086] like Figure 8 and Fig. 9 As shown, in one embodiment, the electronic device 10 further includes an NFC chip 160, which is disposed on the circuit board 150 and electrically connected to the NFC antenna 161, and the NFC chip 160 includes a first differential signal terminal 162 and a second differential signal terminal 163, wherein the first differential signal terminal 162 is electrically connected to the first radiator 120, and the second differential signal terminal 163 is electrically connected to the parasitic branch 140.

[0087] Specifically, the NFC chip 160 is located on the circuit board 150, and the NFC chip 160 includes a first differential signal terminal 162 and a second differential signal terminal 163. The first differential signal terminal 162 can be a positive (+) port of the NFC chip 160, or a negative (-) port of the NFC chip 160. The first differential signal terminal 162 and the second differential signal terminal 163 provide a differential excitation current. That is, when the first differential signal terminal 162 is a positive (+) port, the second differential signal terminal 163 is a negative (-) port; and vice versa. The differential signal generated by the NFC chip 160 can be output via the first differential signal terminal 162, and then flow back to the NFC chip 160 via the second differential signal terminal 163, forming an NFC signal current loop.

[0088] like Figures 10 to 13As shown, after the NFC chip 160 is output through the first differential signal terminal 162, it is connected to the first bracket trace 164 through the PCB trace 2033, through the contact terminal network 202, and connected to the coupling branch 120a through the contact terminal network 202, and then connected to the PCB trace network 203 through the contact terminal 201, connected to the feeding branch 130a through the contact terminal 201, connected to the second bracket trace 165 through the contact terminal network 202, and returned to the second differential signal terminal 163 through the trace of the circuit board 150 through the contact terminal network 202. Wherein, I is the excitation current. The second differential signal terminal 163 of the NFC is output and returns to the first differential signal terminal 162 through the opposite path of the first differential signal terminal 162.

[0089] The first bracket wiring 164 and the second bracket wiring 165 are respectively located on the bracket 151 of the circuit board 150 and may be LDS (Laser-Direct-structuring, LDS) or FPC (Flexible Printed Circuit, FPC).

[0090] like Figures 10 to 13 As shown, the contact terminal network 202 includes a contact terminal 201 and a cellular matching circuit 2021 acting on a cellular frequency band.

[0091] like Fig.15 As shown, the PCB (printed circuit board, PCB) routing network 203 includes a first matching network 2031, a second matching network 2032 and a PCB routing 2033, wherein the first matching network 2031 and the second matching network 2032 are used to reduce the impact on the cellular signal, and the PCB routing 2033 provides a path for the NFC signal.

[0092] Each cellular matching network is used to adjust the shunting effect of the first bracket wiring 164 and the second bracket wiring 165 on the feeding branch 130a, and reduce the mutual interference between the NFC signal and the cellular signal and the influence of the NFC circuit on the cellular antenna impedance.

[0093] On the basis of the parasitic branch 140, each contact terminal 201 is used to adjust the current distribution after the NFC bracket 151 is routed. Fig.18 As shown, the current paths 4001, 4002, 4003, and 4004 further increase the current paths, further disperse the current, and can more effectively reduce the antenna SAR value.

[0094] In one embodiment, the light strip 170 and the first radiator 120 are separated from each other by a first dielectric isolation portion, and the light strip 170 and the second radiator 130 are separated from each other by a second dielectric isolation portion.

[0095] In one embodiment, there is a distance D between the light strip 170 and the second radiator 130, satisfying the relationship: 0<D≤3mm. In this embodiment, by forming a certain distance D between the light strip 170 and the second radiator 130, and making the distance D no more than 3mm, it is ensured that the second radiator 130 can radiate current, and avoid the distance D being too large to affect the current radiation of the second radiator 130, so that the light strip 170, as a parasitic branch 140, can disperse the hot spots and play a role in reducing SAR. Exemplarily, the distance D is 2mm. Of course, in other embodiments, the distance D can also be 1mm, 1.2mm, 1.3mm, 1.5mm, 2.2mm, 2.6mm, or 3mm.

[0096] like Figure 1 As shown, in one embodiment, the electronic device 10 further includes a transparent back cover 190, the transparent back cover 190 is connected to the middle frame 110, the transparent back cover 190 integrally covers the side of the electronic device 10 away from the screen 180 (display screen), and the light strip 170 is visible through the transparent back cover 190. In this way, by setting the transparent back cover 190, it is convenient to display the light generated by the light strip 170 to the user for interactive use, thereby improving the user's experience.

[0097] Exemplarily, when one end of the light strip 170 (parasitic branch 140) is connected to the circuit board 150 by means of a shrapnel or FPC, at this time, when the signal grid display of the electronic device 10 changes, through Soc processing, the light strip 170 displays different patterns flashing to represent the changes in the current signal. The processor can be a Soc (System on chip) processor. Among them, the Soc processor is the core processor in the electronic device 10. The Soc processor has strong computing power. The above-mentioned signal source can be a cellular signal for communication, or it can be a positioning signal for positioning, such as a Global Positioning System (GPS) signal or a Beidou satellite navigation system signal, or other signals, and the embodiments of the present application are not limited to this.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electronic device, characterized in that: include: Middle frame; A circuit board is located in the middle frame; A first radiator is disposed on the middle frame, wherein the first radiator has a first feeding point and a first grounding point; a second radiator, disposed on the middle frame and spaced apart from the first radiator, the second radiator having a second feeding point and a second grounding point, and a gap formed between an end of the second radiator close to the first feeding point and an end of the first radiator close to the first feeding point; A parasitic branch is arranged on a side of the circuit board away from the screen of the electronic device, and the parasitic branch is coupled to the second radiator.

2. The electronic device according to claim 1, characterized in that: The parasitic branch is arranged on a side close to the back cover, and the parasitic branch can be reused as an NFC antenna or a light strip.

3. The electronic device according to claim 1, characterized in that: Also includes: A light strip, at least a portion of which is located in a region close to the NFC antenna, and the light strip is electrically connected to the circuit board.

4. The electronic device according to claim 3, characterized in that: The light strip is arranged on the circuit board in a ring shape along the circumference of the NFC antenna.

5. The electronic device according to claim 3, characterized in that: A magnetic isolation portion is provided on the circuit board, and the magnetic isolation portion is provided between the light strip and the NFC antenna.

6. The electronic device according to claim 3, characterized in that: A switch circuit is provided on the circuit board, and the switch circuit is electrically connected to the parasitic branch. When the light strip is in a working state, the switch circuit is configured to increase the signal receiving and transmitting power of the parasitic branch.

7. The electronic device according to claim 3, characterized in that: Also includes: A grounding plate, wherein the current direction of the grounding plate is opposite to the current direction of the parasitic branch.

8. The electronic device according to any one of claims 1 to 7, characterized in that: The first radiator is a coupling branch, the second radiator is a feeding branch, and the gap is formed between the coupling branch and the feeding branch.

9. The electronic device according to any one of claims 1 to 7, characterized in that: Also includes: A matching circuit is electrically connected to the parasitic branch and is used to adjust the resonance generated by the parasitic branch.

10. The electronic device according to any one of claims 3 to 7, characterized in that: Also includes: An NFC chip is disposed on the circuit board and electrically connected to the NFC antenna, wherein the NFC chip includes a first differential signal terminal and a second differential signal terminal, wherein the first differential signal terminal is electrically connected to the first radiator, and the second differential signal terminal is electrically connected to the parasitic branch.

11. The electronic device according to any one of claims 3 to 7, characterized in that: There is a distance D between the light strip and the second radiator; Satisfies the relationship: 0<D≤3mm.

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