Electronic devices

Abstract

The embodiment of the present application provides an electronic device, including an antenna assembly and a mainboard, wherein the frame of the antenna assembly is provided with a button, a first radiator and a second radiator, and there is a gap between the first radiator and the first radiator, wherein the first radiator is provided with a feeding point and a first grounding point, wherein the first grounding point is provided adjacent to the button, and the second radiator is provided with a second grounding point. The button is electrically connected to the mainboard, and the mainboard is provided with a feed source, which is electrically connected to the feeding point, and the first grounding point and the second grounding point are both grounded. The first radiator is fed with power by the feed source to form resonance, and the second radiator forms resonance as a parasitic branch, so the feeding point only needs to be provided on the first radiator, and the first grounding point of the first radiator is provided close to the button, so that the space of the electronic device can be more reasonably utilized, and the feeding point can be made to avoid the button, which is convenient for the setting of the feed source on the mainboard.

Description

Technical Field

[0001] The present application relates to the field of radio frequency technology, and in particular to an electronic device. Background Art

[0002] With the development of communication technology, people use mobile electronic devices such as mobile phones and tablet computers more widely in their daily lives.

[0003] Antennas are the main electronic components for realizing the communication function of electronic devices and are also one of the indispensable electronic components. Electronic devices in related technologies usually need to be equipped with multiple different types of antennas, such as 4G antennas, 5G antennas, WiFi antennas, GPS antennas, etc. At the same time, setting up multiple antennas has become a trend to ensure good communication of electronic devices, especially to keep the communication of electronic devices smooth in different communication environments.

[0004] In existing electronic devices, the radiator of the antenna is usually arranged on the outer frame of the electronic device. Since there are a large number of antennas and the outer frame of the electronic device also needs to be provided with various types of physical buttons, such as power buttons, volume buttons, etc., the space is very crowded. How to arrange the antenna in a smaller space so that it has better radiation performance has become a problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of this application is to provide an electronic device to at least partially solve the above technical problems.

[0006] The embodiment of the present application provides an electronic device, including an antenna assembly and a mainboard, the antenna assembly including a frame, the frame is provided with a key, a first radiator and a second radiator, the second radiator is provided on a side of the first radiator away from the second radiator, and there is a gap between the first radiator and the first radiator, the first radiator is provided with a feeding point and a first grounding point, the first grounding point is provided adjacent to the key, the second radiator is provided with a second grounding point, and the second grounding point is located at an end of the second radiator away from the first radiator. The key is electrically connected to the mainboard, the mainboard is provided with a feed source, the feed source is electrically connected to the feeding point, and is used to excite resonance on the first radiator and the second radiator, and the first grounding point and the second grounding point are both grounded.

[0007] The electronic device provided in the embodiment of the present application feeds the first radiator with power through a feed source to form resonance, and the second radiator forms resonance as a parasitic branch. Therefore, the feeding point only needs to be set on the first radiator, and the first grounding point of the first radiator is set close to the button. In this way, the space of the electronic device can be used more reasonably, and the feeding point can be kept away from the button, which is convenient for setting the feed source on the mainboard, so that the electronic device can use limited space to achieve multi-band RF radiation.

[0008] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 It is a structural schematic diagram of an electronic device proposed in an embodiment of the present application.

[0011] Figure 2 It is a schematic diagram of the structure of an electronic device proposed in an embodiment of the present application after the rear cover is removed.

[0012] Figure 3 yes Figure 1 Schematic diagram of the partially disassembled structure of the electronic device shown in FIG.

[0013] Figure 4 yes Figure 1 Schematic diagram of the structure of buttons in an electronic device shown in FIG.

[0014] Figure 5 It is a structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

[0015] Figure 6 It is a schematic diagram of the structure of another antenna assembly provided in an embodiment of the present application.

[0016] Figure 7 yes Figure 6 The S-parameter and efficiency curves of the antenna assembly are shown when the first switch circuit 360 is in the off state.

[0017] Figure 8 yes Figure 6 The S-parameter and efficiency curves of the antenna assembly are shown when the first switch circuit 360 is in the connected state.

[0018] Fig. 9 It is a structural schematic diagram of another antenna assembly provided in an embodiment of the present application.

[0019] Fig.10 It is a structural schematic diagram of another antenna assembly provided in an embodiment of the present application.

[0020] Fig.11 It is a circuit diagram of several frequency band switching circuits provided in the embodiments of the present application.

[0021] Fig.12 yes Fig.10The S-parameter curve diagram of the antenna assembly when fed by the first feed source is shown.

[0022] Fig.13 yes Fig.10 The S-parameter curve diagram of the antenna assembly when fed by the second feed source is shown.

[0023] Fig.14 yes Fig.10 A graph showing system efficiency when the antenna assembly is operating. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In the related art, the antenna of the electronic device is usually formed on the frame, mainly in the following ways:

[0026] One way is to use a metal frame, and then make a slit in the frame for injection molding to divide the frame into multiple antenna radiators as antennas. This implementation requires first forming a metal frame, and then making a slit in the frame according to the location of the antenna. After the slit is made, plastic is injected into the slit, and the slit is connected to other structures of the frame. Another way is to use non-metallic plastic to injection-mold the antenna into the frame. In addition, an FPC antenna can be directly attached to the inner wall of the frame.

[0027] In the related art, electronic devices need to be equipped with many buttons. In addition to the conventional power button, volume button, mute button and various shortcut keys, etc. In addition, when users use electronic devices, such as playing games and watching videos, they usually choose to hold the electronic device horizontally. At this time, the antenna on part of the frame will be blocked. At this time, only the antenna on the horizontal frame of the electronic device works, and the buttons are usually set on the horizontal frame of the electronic device. These buttons will interfere with the antenna, resulting in the limitation of the antenna setting position, which is not conducive to the antenna setting.

[0028] Based on this, the inventor of the present application has proposed an electronic device after long-term research, so that the settings of the antenna and the buttons will not interfere with each other and the radio frequency radiation performance of the antenna is guaranteed.

[0029] The content of this application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] It is to be understood that the electronic device in the present application may be a mobile phone or a smart phone (e.g., a phone based on iPhone TM, a phone based on Android TM), a portable gaming device (e.g., Nintendo DS TM, PlayStationPortable TM, Gameboy Advance TM, iPhone TM), a laptop computer, a PDA, a portable Internet device, a music player, and a data storage device, and the electronic device may also be other wearable devices.

[0031] Please also read Figure 1 and Figure 2 The electronic device 10 provided in this embodiment is described by taking a mobile phone as an example. The electronic device 10 includes an antenna assembly 100, a display screen 30, a mainboard 50, a battery 60, etc. The mainboard 50 and the battery 60 are both arranged inside the electronic device 10. The electronic device 10 may also be provided with a front camera, which is arranged on one side of the electronic device 10 where the display screen 30 is arranged.

[0032] Please combine Figure 2 and Figure 3 The antenna assembly 100 includes a frame 20, and the electronic device 10 may further include a front shell 25 and a rear shell 26. The front shell 25 and the rear shell 26 may be disposed on opposite sides of the frame 20 and assembled to the frame. In one embodiment, the frame 20 may be a middle frame of the electronic device 10. The frame 20 includes a middle plate 22 and a frame 23. The frame 23 is disposed around the edge of the middle plate 22, the frame 23 protrudes from the middle plate 22, and the frame 23 protrudes from the middle plate 22 on opposite sides of the middle plate 22. The front shell 25 and the rear shell 26 are respectively assembled on opposite sides of the middle plate 22, and the front shell 25 and the rear shell 26 are assembled and fixed to the frame 23; the rear shell 26, the frame 20 and the front shell 25 together form a cavity, the mainboard 50 is disposed in the cavity and fixed to the middle plate 22, and the cavity may also be used to set other components such as a rear camera, an antenna, and a processor. The main board 50 is disposed on the middle board 22, and the main board 50 may also be provided with various electronic components, including but not limited to processors, memories, antenna modules, speakers, receivers, etc., which are not specifically limited here. A soldering pad (not shown) is provided on the main board 50, and the electronic components are connected to the circuit on the main board 50 by soldering to the soldering pad. In some other embodiments, the frame 20 may also be other partial structures of the electronic device 10, which are not limited here.

[0033] The display screen 30 is mounted on the front shell 25. The display screen 30 may use an LCD (Liquid Crystal Display) screen to display information. The LCD screen may be a TFT (Thin Film Transistor) screen or an IPS (In-Plane Switching) screen or an SLCD (Splice Liquid Crystal Display) screen. In other embodiments, the display screen 30 may use an OLED (Organic Light-Emitting Diode) screen to display information. The OLED screen may be an AMOLED (Active Matrix Organic Light Emitting Diode) screen or a Super AMOLED (Super Active Matrix Organic Light Emitting Diode) screen or a SuperAMOLED Plus (Super Active Matrix Organic Light Emitting Diode Plus) screen, which will not be described in detail here.

[0034] The frame 20 may be an integrated frame, wherein the frame 23 and the middle plate 22 may be formed integrally, so that the frame 20 has sufficient structural strength. The middle plate 22 may be partially or entirely made of metal material, which is not limited here. The middle plate 22 may serve as the "ground" of the antenna assembly 24. For example, in a more specific embodiment, the middle plate 22 may use a metal plate made of a magnesium alloy as a substrate, and the frame 23 may also use a metal frame and be cast integrally with the middle plate 22. In some other embodiments, the frame 23 may also be a non-metal frame, which is not limited here.

[0035] The middle plate 22 has a first side and a second side opposite to each other, wherein the front shell 25 is mounted on the first side of the middle plate 22, and the rear shell 26 is mounted on the second side of the middle plate 22. The frame 23 is connected to the edge of the middle plate 22 and extends toward the first side and the second side of the middle plate 22 at the same time. The frame 23 has an outer surface and an inner surface opposite to each other, and the inner surface can be formed into a ring shape. The middle plate 22 is connected to the inner surface of the frame, that is, the inner surface is arranged around the middle plate 22.

[0036] Please refer again Figure 2, a button 80 is provided on the frame 23 of the frame body 20, and the button 80 includes but is not limited to a power button, a volume button, a mute button, and various shortcut keys. In this embodiment, the button 80 is exemplarily a volume button for adjusting the volume of the electronic device 10. Specifically, refer to Figure 4 The button 80 includes an elastic member 82 and a sliding portion 81. A sliding groove (not shown) is provided on the frame 20. The sliding portion 81 can be slidably embedded in the sliding groove and can be exposed from the sliding groove for user operation. In order to facilitate the user to operate the sliding portion 81, a protrusion 83 can also be provided on the sliding portion 81. A plurality of contact portions 811 are provided on the side of the sliding portion 81 facing the inside of the electronic device 10. One end of the elastic member 82 is electrically connected to the mainboard 50. When the sliding portion 81 slides, the end of the elastic member 82 away from the mainboard 50 is electrically contacted with a contact portion 811, so that the button 80 is enabled.

[0037] "Enable" means to enable the input or output of a control signal. More specifically, when the button 80310 is enabled, the control signal is output to the controller of the mainboard 50. The controller may be, for example, a central processing unit (CPU). The controller generates a control instruction according to the control signal generated by enabling the button 80, and controls the corresponding functional element to execute the control instruction. For example, when the sliding portion 81 slides in the first direction, the volume "+" instruction is executed, and when the sliding portion 81 slides in the first direction, the volume "-" instruction is executed. The first direction and the second direction are two opposite directions.

[0038] The contact portion 811 can be set in various forms so that the button 80 can be electrically connected with the elastic member 82. In one embodiment, the contact portion 811 includes a card slot 812 arranged on the side of the sliding portion 81 facing the inside of the electronic device 10, and the end of the elastic member 82 away from the mainboard 50 is selectively embedded in a card slot 812, at which time the elastic member 82 is connected to the sliding portion 81 and enabled, and multiple card slots 812 can correspond to multiple enabled states of the button 80, or correspond to different volumes of the electronic device 10. Exemplarily, in this embodiment, there are three card slots 812, and the three card slots 812 are arranged side by side, and the three card slots 812 correspond to functions such as "volume +", "volume -" and "volume hold" respectively. By setting the card slot 812, when the elastic member 82 contacts a contact portion 811, the card slot 812 can form a certain limiting effect on the elastic member 82, so that the position of the elastic member 82 can be fixed and always maintain electrical contact with the sliding portion 81. At the same time, since the elastic member 82 has a certain elastic force, during the sliding process of the sliding part 81, the sliding part 81 compresses the elastic member 82, and then switches in different slots 812. The slot 812 can be a rectangular slot, a strip slot, etc., which is not limited here.

[0039] In this embodiment, the elastic member 82 may include a spring 822 and a metal ball 821, one end of the spring 822 is electrically connected to the main board 50, and the other end is electrically connected to the metal ball 821, and the metal ball 821 may be embedded in the card slot 812. At this time, the card slot 812 may be set to be semicircular to fit the metal ball 821, so that the metal ball 821 may have a larger contact area with the sliding portion 81. Of course, in some other embodiments, the elastic member 82 may also be in other forms, for example, the elastic member 82 may directly adopt a spring sheet structure, which is not limited here.

[0040] To facilitate user operation, in this embodiment, the button 80 is arranged on the frame 23 of the frame 20 in the length direction, that is, on the frame 23 in the length direction of the electronic device 10, so that the button 80 will not be blocked when the user is performing games, videos, etc.

[0041] The structure of the button 80 provided in this embodiment is in a slidable form, which can facilitate user operation. However, since this type of button 80 structure requires a space for the button 80 to slide, the length of the frame 20 it occupies is longer, resulting in the compression of the setting space of the antenna assembly 100.

[0042] In this embodiment, the frame 23 is made of metal. Figure 2 and Figure 5 , a slit 350 is provided on the frame 23 of the frame body 20, and the slit 350 runs through the inner surface and the outer surface. The slit 350 separates the frame 23 to form a first radiator 310 and a second radiator 330. The first radiator 310 and the second radiator 330 serve as the radio frequency structure of the antenna assembly 100, and are used to radiate signals outward or receive signals sent by an external device. The first radiator 310 and the second radiator 330 are located on both sides of the slit 350. Depending on the number of antennas, the number of slits 350 can be multiple, which is not limited here. And according to the setting position of the antenna assembly 100, the slit 350 can be opened at any position of the frame 23. It is understandable that in some other embodiments, the first radiator 310 and the second radiator 330 may also be in the form of FPC, LDS, PDS, etc. In this case, the first radiator 310 and the second radiator 330 may be directly set on the inner wall of the frame 23 by bonding or clamping, or buried inside the frame 23, and the first radiator 310 and the second radiator 330 may be set at intervals. Specifically in this embodiment, the first radiator 310 and the second radiator 330 are both located on the same frame of the electronic device 10 as the button 80, that is, the first radiator 310 and the second radiator 330 are also set on the frame in the length direction of the electronic device 10. In this way, when the user is playing games, watching videos, etc., the antenna assembly 100 will not be blocked, and a good communication effect can be maintained.

[0043] The second radiator 330 is disposed on a side of the first radiator 310 away from the second radiator 330, and is spaced apart from the first radiator 310. In this embodiment, the space is a gap 350. The first radiator 310 is provided with a feeding point 311 and a first grounding point 312. The first grounding point 312 is disposed adjacent to the key 80. Specifically, the first grounding point 312 can be located at the end of the first radiator 310 away from the second radiator 330 and adjacent to the slide groove on the frame 20, that is, the first grounding point 312 is close to the end of the sliding stroke of the sliding portion 81. In this way, the length of the frame 20 other than the key 80 can be reasonably utilized to set the antenna radiator.

[0044] The second radiator 330 is provided with a second grounding point 331, which is located at the end of the second radiator 330 away from the first radiator 310, that is, the first grounding point 312 and the second grounding point 331 are respectively located at relatively far end positions of the first radiator 310 and the second radiator 330, which is conducive to fully utilizing the length of the first radiator 310 and the second radiator 330.

[0045] The main board 50 is provided with a feed source 51, which is electrically connected to the feed point 311 through a feed circuit, and is used to excite resonance on the first radiator 310 and the second radiator 330. The feed source 51 directly excites resonance on the first radiator 310, and the second radiator 330, as a parasitic branch of the first radiator 310, is also excited to resonate, thereby realizing the radio frequency function.

[0046] The feeding point 311 can use metal shrapnel, ejector pins and other components to achieve coupling between the feeding circuit and the first radiator 310. Exemplarily, the RF module and the feeding circuit are set on a printed circuit board (PCB). In the transmission scenario, the RF signal can be transmitted to the electrical connection component (such as the above-mentioned metal shrapnel, ejector pin, etc.) at the feeding point 311 through the feeding circuit on the PCB, and the RF signal can be transmitted to the antenna radiator through the rigid connection of the electrical connection component or through the welding of conductive materials such as electronic circuits on the FPC. In this way, the antenna radiator can transmit the RF signal (analog signal) in the form of electromagnetic waves in the working frequency band corresponding to the antenna. For example, the antenna radiator can operate in a low frequency band, so after receiving the RF signal from the feeding point 311, the antenna radiator can transmit the RF signal in the form of electromagnetic waves at a low frequency. Correspondingly, in the receiving scenario, the antenna radiator can receive low-frequency electromagnetic wave signals (i.e., low-frequency electromagnetic waves), and convert the low-frequency electromagnetic waves into analog signals, and feed them back to the RF module through the feeding point 311, thereby realizing the reception of low-frequency signals.

[0047] In order to enable the first radiator 310 to radiate more frequency bands and enable it to be used in different communication environments, the feeding circuit may also include a frequency band switching circuit, which is used to selectively switch the feeding frequency to achieve multiplexing of the antenna radiator. Exemplarily, the frequency band switching circuit can switch the feeding frequency so that the feeding circuit can feed various types of signals such as low-frequency 5G signals and low-frequency 4G signals to the feeding point 311. In some other embodiments, the feed source 51 can feed signals of other frequency bands through the feeding circuit, which is not limited here.

[0048] As just an example, in this embodiment, the feed source 51 is used to feed low-frequency signals. The feed circuit may include a frequency band switching circuit and a connection point, and the connection point is used to electrically connect to the feed source 51 of the mainboard 50. The frequency band switching circuit is used to feed signals of different frequency bands to the feed point 311.

[0049] The working principle of the antenna assembly 100 provided in this embodiment is that the feed source 51 feeds power to the first feeding point 311, thereby exciting resonance on the first radiator 310, and at the same time a parasitic unidirectional current is formed on the second radiator 330 to excite resonance, thereby realizing radio frequency radiation. By reasonably adjusting the lengths of the first radiator 310 and the second radiator 330 and the position of the feeding point 311, the frequency band of the radio frequency can be controlled, thereby realizing multi-band radio frequency radiation.

[0050] See also Figure 6 In order to better realize radio frequency radiation of more frequency bands, the electronic device 10 may also include a first switch circuit 360 for switching the radiation frequency band, one end of the first switch circuit 360 is electrically connected to the first radiator 310, and the other end is grounded, and the connection point e between the first switch circuit 360 and the first radiator 310 is located between the feeding point 311 and the first grounding point 312. Here, "ground" may refer to the middle frame of the frame 20. The first switch circuit 360 may be set in any form, which is not limited here. In one embodiment, a capacitor or an inductor may be set between the first switch circuit 360 and the ground, and the filter grounding is realized by utilizing the AC resistance DC characteristics of the capacitor, or utilizing the DC resistance AC characteristics of the inductor. Of course, in some other embodiments, the first switch circuit 360 may also be directly grounded. The first switch circuit 360 can switch the radiation frequency band of the first radiator 310.

[0051] For the sake of illustration, please refer again to Figure 6 , with the two ends of the second radiator 330 being a (a being the second grounding point 331) and b, the two ends of the first radiator 310 being c and f (f being the first grounding point 312), the feeding point 311 being d, and the connection point between the first switching circuit 360 and the first radiator 310 being e.

[0052] Exemplarily, when the first switch circuit 360 is in an off state, the antenna assembly 100 may have mode 1, mode 2, and mode 3. Figure 7 The S parameters and efficiency of the antenna assembly when the first switch circuit 360 is in the off state are shown, wherein the horizontal axis represents the radiation frequency and the vertical axis represents the radiation intensity. Curve A is the S parameter curve of the antenna assembly, curve B is the radiation efficiency curve of the antenna assembly, and curve C is the system efficiency curve of the antenna assembly. Figure 7 As shown, mode 1 is a quarter of the base film of the cf segment in the first radiator 310, which can cover the B3 frequency band, mode 2 is a quarter of the base film of the ab segment in the second radiator 330, accompanied by a strong quarter of the cd segment, which is used to cover the N41 and WIFI2.4G frequency bands, and mode 3 is a quarter of the cd segment in the first radiator 310, accompanied by a strong quarter of the ab segment, which is used to cover the N78 frequency band. The entire antenna covers the B3-N41-WIFI2.4G-N78 frequency band. The above is only an example of a specific implementation method, and is not a limitation on the working frequency bands of the first radiator 310 and the second radiator 330 in this embodiment. In some other implementation methods, the first radiator 310 and the second radiator 330 can also cover other working frequency bands, which are not limited in this embodiment.

[0053] Among them, mode 2 and mode 3 are two commonly used working modes of the matching antenna, in which the length of the ab segment can be greater than or equal to the length of the cd segment, that is, the length of the second radiator 330 between the second grounding point 331 and the interval is greater than or equal to the length of the first radiator 310 between the feeding point 311 and the interval. This implementation method can make mode 2 and mode 3 work in different frequency bands, such as mode 2 is mainly resonated by the ab segment, and the resonant frequency is in the relatively low frequency N41-WIFI2.4G frequency band, while mode 3 is mainly resonated by the cd segment, so the resonant frequency is in the relatively high frequency N78 frequency band. Of course, in some other implementation methods, the length of the second radiator 330 between the second grounding point 331 and the interval can be less than the length of the first radiator 310 between the feeding point 311 and the interval. At this time, the working frequency bands of mode 2 and mode 3 can be interchanged.

[0054] Figure 8 The S parameters and efficiency of the antenna assembly when the first switch circuit 360 is in the connected state are shown, wherein the horizontal axis represents the radiation frequency and the vertical axis represents the radiation intensity. Curve A is the S parameter curve of the antenna assembly, curve B is the radiation efficiency curve of the antenna assembly, and curve C is the system efficiency curve of the antenna assembly. Figure 8As shown, when the first switch circuit 360 is in a connected state, mode 1 is still mainly a quarter fundamental mode of the cf segment, but since the switch at point e is connected, there is also a strong current flowing from point e to the ground, so the frequency shifts from the original B3 band to the B1 band; mode 2 is mainly a quarter fundamental mode of the ab segment, accompanied by a strong cd segment quarter fundamental mode flowing to the ground, which is used to cover the N41 and WIFI2.4G bands, and mode 3 is mainly a quarter fundamental mode of the cd segment, accompanied by a strong ab segment quarter fundamental mode flowing to the ground, which is used to cover the N78 band. Since the branches mainly used in modes 2 and 3 are ab and cd segments, the current return path introduced by the switch connection at point e mainly affects the cf segment, and has almost no effect on the N41-WIFI2.4G-N78 band corresponding to modes 2 and 3. At this time, the entire antenna assembly 100 can cover the B1-N41-WIFI2.4G-N78 band.

[0055] Refer to Table 1, which shows the total efficiency values ​​in various operating frequency bands when the first switch circuit 360 is in the on / off state.

[0056]

[0057] It can be seen from the data in Table 1 that the antenna assembly 100 provided in this embodiment achieves multi-band resonance in a relatively narrow space and has good efficiency in each frequency band.

[0058] In another embodiment, see Fig. 9 The antenna assembly 100 may further include a second switch circuit 370, one end of the second switch circuit 370 is electrically connected to the second radiator 330, and the other end is grounded, and the connection point between the second switch circuit 370 and the second radiator 330 is located between the second grounding point 331 and the first radiator 310. The second switch circuit 370 may be arranged in the same manner as the first switch circuit 360, which is not limited here.

[0059] like Fig. 9As shown, the two ends of the second radiator 330 are g (g is the second grounding point 331) and b, the connection point between the second switch circuit 370 and the second radiator 330 is a, the two ends of the first radiator 310 are c and f (f is the first grounding point 312), the feeding point 311 is d, and the connection point between the first switch circuit 360 and the first radiator 310 is e. It is equivalent to extending the ab segment of the second radiator 330 away from the first radiator 310 to form a ga segment. By controlling the connection or disconnection of the second switch circuit 370, the quarter fundamental mode resonance of the gb segment can be achieved, thereby covering the LB frequency band (such as the N28 frequency band), and then cooperating with the first switch circuit 360, the resonance of N28-B3-N41-WIFI2.4G-N78 and N28-B1-N41-WIFI2.4G-N78 can be achieved.

[0060] The electronic device 10 may also have multiple SIM card slots so that the user can install multiple SIM cards, wherein the multiple SIM cards can be from the same operator or different operators. Some electronic devices can switch between different SIM cards according to the communication environment, and the user can also actively switch between different SIM cards. During the switching process, the signal of the antenna assembly 100 may be interrupted or weakened.

[0061] Therefore, in another embodiment, see Fig.10 , the feeding point 311 may include a first feeding point 3111 and a second feeding point 3112, the feed source 51 includes a first feed source 511 and a second feed source 512, the first feed source 511 is electrically connected to the first feeding point 3111, the second feed source 512 is electrically connected to the second feeding point 3112, and the first feeding point 3111 is located on a side of the second feeding point 3112 away from the first grounding point 312. The first feed source 511 may operate in the MHB frequency band, and the second feed source 512 may operate in the N78 frequency band.

[0062] The first feed source 511 is electrically connected to the first feed point 311 through a feed circuit, and the second feed source 512 is electrically connected to the second feed point 311 through a feed circuit. The feed circuit may include a frequency band switching circuit for switching different feeding frequency bands, so that the modes fed into the first feed point 311 and the second feed point 311 can be switched to stimulate resonances of different frequency bands. Exemplarily, the frequency band switching circuit may include adjustable devices such as switches, inductors, variable capacitors, or combinations thereof, which are not limited here. Fig.11 The circuit diagrams of several frequency band switching circuits are shown, wherein the frequency band switching circuits can be selected from Fig.11 Any circuit structure shown is not limited here. Of course, in other implementations, the frequency band switching circuit can also have other structures, which are not limited here.

[0063] For ease of description, please refer again to Fig.10 , with the two ends of the second radiator 330 being a (a being the second grounding point 331 ) and b, the two ends of the first radiator 310 being c and f (f being the first grounding point 312 ), the first feeding point 311 being d, and the second feeding point 311 being e for illustration.

[0064] The working principle of the antenna assembly 100 is introduced as follows:

[0065] For the first feed source 51, there are mainly two modes: Fig.12 The S parameter curve of the antenna assembly when fed by the first feed source is shown, wherein the horizontal axis represents the radiation frequency and the vertical axis represents the radiation intensity. Fig.12 Mode 1 is the 1 / 4 wavelength mode of the ab segment, accompanied by a strong reverse current of the cd segment, and mode 2 is the 1 / 4 wavelength mode of the cd segment. For the second feed source 51, there are mainly three working modes: Fig.13 The S parameter curve of the antenna assembly when fed by the second feed source is shown, wherein the horizontal axis represents the radiation frequency and the vertical axis represents the radiation intensity. Fig.13 Mode 1 is the 1 / 4 wavelength mode of the cf segment, mode 2 is mainly the 1 / 4 wavelength mode of the ce segment, accompanied by a strong unidirectional current of the ab segment flowing to the ground from point a, mode 3 is mainly the 1 / 4 wavelength mode of the ab segment, accompanied by a strong reverse current of the ce segment, where the length of the ab segment can be 1 / 4 wavelength of mode 3.

[0066] Fig.14 The system efficiency curve of the antenna assembly 100 when it is working is shown, wherein the horizontal axis represents the radiation frequency and the vertical axis represents the radiation intensity. Curve A and curve C are respectively the radiation efficiency curve and the system efficiency curve of the first feed source 51 when it is working, and curve B and curve D are respectively the radiation efficiency curve and the system efficiency curve of the second feed source 51 when it is working. Fig.14 It can be seen that the first feed source 51 and the second feed source 51 can achieve dual-wave coverage in the B41 band and the WiFi2.4G band, and have a wide bandwidth and high sideband efficiency. In the dual SIM card mode, in different SIM switching processes, the B41 band and the WiFi2.4G band can both ensure good communication effects, allowing users to play games, watch videos, etc. The N78 band and the B41 band can be generated separately with dual feeds, and the intermodulation interference is small in the dual SIM card mode, and no combiner is required, further reducing costs.

[0067] In one embodiment, please refer again to Fig.10The antenna assembly 100 may further include a third switch circuit 380, one end of the third switch circuit 380 is electrically connected to the first radiator 310, and the other end is grounded, and the connection point between the third switch circuit 380 and the second radiator 330 is located between the second grounding point 331 and the first radiator 310. The structure of the third switch circuit 380 may be the same as that of the first switch circuit 360 or the second switch circuit 370, or may be the same as that of the first switch circuit 360 or the second switch circuit 370. Fig.11 Any of the multiple switch circuit structures shown is not limited here. By setting the third switch circuit 380, a bandpass return to ground of the N78 frequency band can be added to the second radiator 330. In a more specific embodiment, a 6.8nH inductor and a 0.3pF capacitor can be set in series to ground, which is a short-circuit return path for N78 and has a large impedance to MHB, so the radiation of the MHB frequency band has little effect.

[0068] In the electronic device 10 provided in this embodiment, the antenna assembly 100 can be arranged on the same side frame 23 as the button 80, so that the space of the electronic device 10 can be better utilized and radiation of more frequency bands can be achieved, which is beneficial for users to play games, watch videos and other operations.

[0069] It should be noted that, in the present application, the descriptions involving "first", "second", "third" and "fourth" are only used for distinction and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0070] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electronic device, characterized in that: include: An antenna assembly, the antenna assembly comprising a frame, the frame being provided with a button, a first radiator and a second radiator, the button, the first radiator and the second radiator being located on the same frame of the frame, the second radiator being arranged on a side of the first radiator away from the second radiator and having a gap between the first radiator and the first radiator, the first radiator being provided with a feeding point and a first grounding point, the first grounding point being arranged adjacent to the button, the second radiator being provided with a second grounding point, and the second grounding point being located at an end of the second radiator away from the first radiator; and The button is electrically connected to the mainboard, the mainboard is provided with a feed source, the feed source is electrically connected to the feeding point, and is used to excite resonance on the first radiator and the second radiator, and the first grounding point and the second grounding point are both grounded.

2. The electronic device according to claim 1, characterized in that: The antenna assembly also includes a first switching circuit for switching the radiation frequency band, one end of the first switching circuit is electrically connected to the first radiator, the other end is grounded, and the connection point between the first switching circuit and the first radiator is located between the feeding point and the first grounding point.

3. The electronic device according to claim 2, characterized in that: The antenna assembly also includes a second switch circuit, one end of the second switch circuit is electrically connected to the second radiator, and the other end is grounded, and the connection point between the second switch circuit and the second radiator is located between the second grounding point and the first radiator.

4. The electronic device according to claim 2, characterized in that: A length of the second radiator between the second ground point and the interval is greater than or equal to a length of the first radiator between the feeding point and the interval.

5. The electronic device according to claim 1, characterized in that: The feeding point includes a first feeding point and a second feeding point, the feed source includes a first feed source and a second feed source, the first feed source is electrically connected to the first feeding point, the second feed source is electrically connected to the second feeding point, and the first feeding point is located on a side of the second feeding point away from the first grounding point.

6. The electronic device according to claim 5, characterized in that: The first feeding point is electrically connected to the first feeding point through a feeding circuit, and the second feeding point is electrically connected to the second feeding point through a feeding circuit. The feeding circuit includes a frequency band switching circuit, and the frequency band switching circuit is used to switch different feeding frequency bands.

7. The electronic device according to claim 5, characterized in that: The antenna assembly also includes a third switch circuit, one end of the third switch circuit is electrically connected to the first radiator, and the other end is grounded, and the connection point between the third switch circuit and the second radiator is located between the second grounding point and the first radiator.

8. The electronic device according to any one of claims 1 to 7, characterized in that: The button includes an elastic member and a sliding portion, a sliding groove is provided on the frame, the sliding portion can be slidably embedded in the sliding groove, a side of the sliding portion facing the inside of the electronic device is provided with multiple contact portions, one end of the elastic member is electrically connected to the mainboard, and when the sliding portion slides, the end of the elastic member away from the mainboard is electrically contacted with one of the contact portions.

9. The electronic device according to claim 8, characterized in that: The contact portion comprises a slot arranged on a side of the sliding portion facing the inside of the electronic device, and an end of the elastic member away from the mainboard is selectively embedded in one of the slots.

10. The electronic device according to claim 9, characterized in that: The elastic member comprises a spring and a metal ball. One end of the spring is electrically connected to the mainboard, and the other end of the spring is electrically connected to the metal ball. The metal ball can be embedded in the card slot.

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