CN115441159A - Electronic device - Google Patents

Abstract

The embodiment of the application provides an electronic device, including antenna module and mainboard, the framework of antenna module is provided with the button, first irradiator and second irradiator, and with have the interval between the first irradiator, first irradiator is provided with feed point and first ground point, and first ground point is close to the button setting, and the second irradiator is provided with the second ground point. The button is connected with the mainboard electricity, and the mainboard is provided with the feed, and the feed is connected with the feed point electricity, and first ground point and second ground point are all grounded. Feed through the feed and form the resonance to first irradiator, the second irradiator forms the resonance as parasitic minor matters simultaneously, consequently the feed point only need set up on first irradiator can, the first ground point of first irradiator is close to the button setting, can be more reasonable like this utilize electronic equipment's space, and can make the feed point avoid the button, the setting of the feed on the mainboard of being convenient for.

Description

Electronic device

Technical Field

The application relates to the technical field of radio frequency, in particular to an electronic device.

Background

With the development of communication technology, people use mobile electronic devices such as mobile phones and tablet computers more widely in daily life.

The antenna is a main electronic component for realizing the communication function of the electronic device, and is one of indispensable electronic components, and the electronic device in the related art generally needs to be provided with a plurality of different types of antennas, such as a 4G antenna, a 5G antenna, a WiFi antenna, a GPS antenna, etc., and the provision of a plurality of antennas at the same time tends to ensure good communication of the electronic device, especially to keep communication of the electronic device smooth in different communication environments.

In the existing electronic device, a radiator of an antenna is usually arranged on an outer frame of the electronic device, and because the number of the antennas is large, and the outer frame of the electronic device needs to be provided with various types of physical keys, such as a switch key, a volume key, and the like, the space is very crowded, and how to arrange the antenna in a small space makes the antenna have better radiation performance, which becomes a problem to be solved urgently.

Disclosure of Invention

It is an object of the present application to provide an electronic device to at least partially solve the above technical problem.

The embodiment of the application provides an electronic device, including antenna module and mainboard, the antenna module includes the framework, the framework is provided with the button, first irradiator and second irradiator, the second irradiator sets up in the one side of keeping away from the second irradiator of first irradiator, and have the interval between the first irradiator, the first irradiator is provided with feed point and first ground point, first ground point is close to the button setting, the second irradiator is provided with the second ground point, the second ground point is located the one end of keeping away from the first irradiator of second irradiator. The key is electrically connected with the main board, the main board is provided with a feed source, the feed source is electrically connected with the feed point and used for exciting resonance on the first radiating body and the second radiating body, and the first grounding point and the second grounding point are both grounded.

The electronic equipment that this application embodiment provided, form the resonance to first irradiator feed through the feed, the second irradiator forms the resonance as parasitic branch knot simultaneously, consequently the feed point only need set up on first irradiator can, the first ground point of first irradiator is close to the button setting, the space of utilizing electronic equipment that can be more reasonable like this, and can make the feed point avoid the button, the setting of the feed on the mainboard of being convenient for, make electronic equipment can utilize limited space, realize the radio frequency radiation of multifrequency section.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present application after a rear case is removed.

Fig. 3 is a partially disassembled structural schematic diagram of the electronic device shown in fig. 1.

Fig. 4 is a schematic structural diagram of a key in the electronic device shown in fig. 1.

Fig. 5 is a schematic structural diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 6 is a schematic structural diagram of another antenna assembly provided in the embodiments of the present application.

Fig. 7 is a graph of S-parameter and efficiency for the antenna assembly shown in fig. 6 in the open state of the first switching circuit 360.

Fig. 8 is a graph of S-parameter and efficiency for the antenna assembly shown in fig. 6 in the first switching circuit 360 on state.

Fig. 9 is a schematic structural diagram of another antenna assembly provided in the embodiments of the present application.

Fig. 10 is a schematic structural diagram of another antenna assembly provided in the embodiment of the present application.

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

Fig. 12 is a graph of S-parameters at the first feed in the antenna assembly shown in fig. 10.

Fig. 13 is a graph of S-parameters at the second feed in the antenna assembly shown in fig. 10.

Fig. 14 is a graph of system efficiency for the antenna assembly shown in fig. 10 in operation.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the related art, an antenna of an electronic device is usually formed on a frame, and there are mainly the following ways:

one mode is to adopt a metal frame, and the frame is divided into a plurality of sections of antenna radiators as an antenna by slotting the frame for injection molding. The other mode is to adopt non-metallic plastic, mould plastics the rubber coating with the antenna in the frame, in addition, can also adopt FPC antenna direct paste to locate the inner wall of frame etc..

In the related art, the electronic device needs to be provided with more keys. Except for conventional switch keys, volume keys, mute keys, various shortcut keys and the like. In addition, when a user uses the electronic device, for example, in application scenes such as playing games, watching videos, and the like, the user usually selects to hold the electronic device in a horizontal manner, at this time, the antenna on a part of the frame is shielded, at this time, the electronic device only has the antenna on the horizontal frame to work, and usually the keys are also arranged on the horizontal frame of the electronic device, and interference is generated between the keys and the antenna, so that the arrangement position of the antenna is limited, and the arrangement of the antenna is not favorable.

Based on this, the inventors of the present application have made a long-term study and have proposed an electronic device that ensures radio frequency radiation performance of an antenna without interference between the arrangement of the antenna and the key.

The present disclosure will now be described in detail with reference to the drawings and specific embodiments thereof.

It is understood that the electronic device in the present application may be a mobile phone or smart phone (e.g., iPhone (TM) based, android (TM) based phone), a Portable game device (e.g., nintendo DS (TM), playStation Portable (TM), game Advance (TM), iPhone (TM)), a laptop, a PDA, a Portable Internet device, a music player, and a data storage device, and may also be other wearable devices.

Referring to fig. 1 and fig. 2 together, the electronic device 10 provided in the present embodiment is described by taking a mobile phone as an example. The electronic device 10 includes an antenna assembly 100, a display 30, a motherboard 50, a battery 60, and the like, where the motherboard 50 and the battery 60 are disposed inside the electronic device 10. The electronic device 10 may also be provided with a front-facing camera, which is disposed on the side of the electronic device 10 where the display screen 30 is disposed.

Referring to fig. 2 and 3 together, 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, where 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 an embodiment, the frame body 20 may be a middle frame of the electronic device 10, the frame body 20 includes a middle plate 22 and a frame 23, the frame 23 surrounds an edge of the middle plate 22, the frame 23 protrudes out of the middle plate 22, and the frame 23 protrudes out of the middle plate 22 on two opposite sides of the middle plate 22. The front shell 25 and the rear shell 26 are respectively assembled on two opposite sides of the middle plate 22, and the front shell 25 and the rear shell 26 are fixedly assembled with the frame 23; the rear case 26, the frame 20 and the front case 25 together form a cavity, the main board 50 is disposed in the cavity and fixed on the middle plate 22, and the cavity may be further provided with various 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 further be disposed with various electronic components, including but not limited to a processor, a memory, an antenna module, a speaker, a receiver, and the like, which are not limited herein. The main board 50 is provided with pads (not shown) through which the electronic components are connected to the circuit on the main board 50 by soldering. In other embodiments, the frame 20 may be another part structure of the electronic device 10, and is not limited herein.

The Display screen 30 is assembled on the front case 25, the Display screen 30 may be a Liquid Crystal Display (LCD) screen for displaying information, and the LCD screen may be a Thin Film Transistor (TFT) screen, an In-Plane Switching (IPS) screen, or a Liquid Crystal Display (SLCD) screen. In other embodiments, the display screen 30 may adopt an OLED (Organic Light-Emitting Diode) screen for displaying information, and 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 Super AMOLED Plus (Super Active Matrix Organic Light-Emitting Diode, smart screen), which will not be described herein again.

The frame 20 may be a one-piece frame, wherein the frame 23 and the middle plate 22 may be integrally formed, so that the frame 20 has sufficient structural strength. The middle plate 22 may be made of a metal material partially or entirely, and is not limited herein. Midplane 22 may serve as a "ground" for antenna assembly 24. For example, in a more specific embodiment, the middle plate 22 may be formed by casting a metal plate made of a magnesium alloy material as a substrate, and the frame 23 may be formed by casting a metal frame integrally with the middle plate 22. In other embodiments, the frame 23 may also be a non-metal frame, which is not limited herein.

The middle plate 22 has opposite first and second sides, wherein a front shell 25 is mounted to the first side of the middle plate 22 and a rear shell 26 is mounted to the second side of the middle plate 22. The frame 23 is connected to an edge of the middle plate 22 and extends toward both the first side and the second side of the middle plate 22, the frame 23 has an outer surface and an inner surface, which are opposite to each other and may form a ring shape, and the middle plate 22 is connected to the inner surface of the frame, that is, the inner surface is disposed around the middle plate 22.

Referring to fig. 2 again, the frame 23 of the frame 20 is provided with keys 80, and the keys 80 include, but are not limited to, a switch key, a volume key, a mute key, and various shortcut keys. In the present embodiment, the key 80 is illustratively a volume key for adjusting the volume of the electronic device 10. Specifically, referring to fig. 4, the key 80 includes an elastic member 82 and a sliding portion 81, a sliding slot (not shown) is disposed on the frame 20, the sliding portion 81 is slidably inserted into the sliding slot and can be exposed from the sliding slot for user operation, in order for the user to operate the sliding portion 81, a protrusion 83 may be disposed on the sliding portion 81, a plurality of contact portions 811 are disposed on a 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 main board 50, and when the sliding portion 81 slides, one end of the elastic member 82 away from the main board 50 is electrically contacted with one contact portion 811, so that the key 80 is enabled.

"enable" refers to causing a control signal to be input or output. More specifically, when the button 80310 is enabled, the control signal is output to a controller of the motherboard 50, the controller may be, for example, a Central Processing Unit (CPU), and the controller generates a control command according to the control signal that is enabled and generated by the button 80, and controls the corresponding functional element to execute the control command, for example, when the sliding portion 81 slides in a first direction, the volume "+" command is executed, and when the sliding portion 81 slides in the first direction, the volume "-" command is executed, where the first direction and the second direction are opposite directions.

The contact portion 811 may be configured in various forms so that the key 80 can be electrically connected to the elastic member 82. In one embodiment, the contact portion 811 includes a card slot 812 disposed on a side of the sliding portion 81 facing the inside of the electronic device 10, and an end of the elastic member 82 away from the main board 50 is selectively inserted into one card slot 812, at which the elastic member 82 and the sliding portion 81 are enabled to be in conduction, and the plurality of card slots 812 may correspond to a plurality of enabled states of the keys 80 or different sound volumes of the electronic device 10. Illustratively, in this embodiment, three card slots 812 are provided, the three card slots 812 are arranged side by side, and the three card slots 812 respectively correspond to functions of "volume +", "volume-" and "volume hold". By providing the locking groove 812, when the elastic member 82 contacts one of the contact portions 811, the locking groove 812 can limit the elastic member 82 to a certain extent, so that the position of the elastic member 82 can be fixed and kept in electrical contact with the sliding portion 81 all the time. Meanwhile, since the elastic member 82 has a certain elastic force, during the sliding process of the sliding portion 81, the sliding portion 81 compresses the elastic member 82, so as to switch between different card slots 812. The card slot 812 may be a rectangular slot, a strip slot, etc., and is not limited herein.

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, the other end of the spring 822 is electrically connected to the metal ball 821, and the metal ball 821 may be inserted into the slot 812, in which the slot 812 may be configured to be semicircular and adapted to the metal ball 821, so that the metal ball 821 may have a larger contact area with the sliding part 81. Of course, in other embodiments, the elastic element 82 may also be in other forms, for example, the elastic element 82 may directly adopt a spring structure, which is not limited herein.

In the present embodiment, the keys 80 are disposed on the frame 23 of the housing 20 in the longitudinal direction, that is, on the frame 23 of the electronic device 10 in the longitudinal direction, so that the keys 80 are not blocked when a user performs operations such as games and videos.

The structure of the key 80 provided in this embodiment is in a slidable form, which can facilitate the operation of the user, but the structure of the key 80 needs to provide a space for the key 80 to slide, so that the length of the frame 20 occupied by the structure is longer, which results in the arrangement space of the antenna assembly 100 being compressed.

In this embodiment, the frame 23 is made of a metal material, and referring to fig. 2 and fig. 5, a broken seam 350 is formed on the frame 23 of the frame 20, the broken seam 350 penetrates through the inner surface and the outer surface, the broken seam 350 separates the frame 23 into a first radiator 310 and a second radiator 330, and the first radiator 310 and the second radiator 330 are used as radio frequency structures of the antenna assembly 100 and are configured to radiate signals outwards or receive signals sent by an external device. The first radiator 310 and the second radiator 330 are located at both sides of the break 350. The number of the slits 350 may be plural according to the number of the antennas, and is not limited herein. And the break 350 may be opened at any position of the bezel 23 depending on the position where the antenna assembly 100 is disposed. It is understood 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 which case the first radiator 310 and the second radiator 330 may be directly disposed on the inner wall of the frame 23 by bonding or clipping, or embedded inside the frame 23, in which case the first radiator 310 and the second radiator 330 may be disposed at intervals. Specifically, in the present embodiment, the first radiator 310 and the second radiator 330 are both located on the same frame of the electronic device 10 as the key 80, that is, the first radiator 310 and the second radiator 330 are also located on the frame of the electronic device 10 in the length direction. Therefore, when a user plays games, watches videos and the like, the antenna assembly 100 is not shielded, and a good communication effect can be kept.

The second radiator 330 is disposed on a side of the first radiator 310 away from the second radiator 330, and has a gap with the first radiator 310, in this embodiment, the gap is a broken seam 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 may be located at an end of the first radiator 310 away from the second radiator 330 and adjacent to the sliding slot 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, so that the length of the frame 20 except the key 80 can be reasonably utilized to dispose the antenna radiator.

The second radiator 330 is provided with a second grounding point 331, and the second grounding point 331 is located at an end of the second radiator 330 far from an end of the first radiator 310, that is, the first grounding point 312 and the second grounding point 331 are respectively located at end positions of the first radiator 310 and the second radiator 330 far from each other, which is beneficial to fully utilizing lengths of the first radiator 310 and the second radiator 330.

The board 50 is provided with a feed 51, and the feed 51 is electrically connected to a feed point 311 through a feed circuit, and is used for exciting resonance on the first radiator 310 and the second radiator 330. The feed source 51 directly excites the first radiator 310 to resonate, and the second radiator 330 is excited to resonate as a parasitic stub of the first radiator 310, thereby implementing a radio frequency function.

The feeding point 311 may be implemented by a metal dome, a thimble, or the like, to couple the feeding circuit and the first radiator 310. For example, the radio frequency module and the feeding circuit are disposed on a Printed Circuit Board (PCB). In a transmitting scenario, the radio frequency signal may be transmitted to an electrical connection component (such as the metal spring, the thimble, etc.) at the feeding point 311 through a feeding circuit on the PCB, and the radio frequency signal may be transmitted to the antenna radiator through rigid connection of the electrical connection component or through welding of a conductive material such as an electronic circuit on the FPC. Therefore, the antenna radiator can transmit radio frequency signals (analog signals) in an electromagnetic wave mode according to the working frequency band corresponding to the antenna. For example, the antenna radiator may operate in a low frequency band, and after receiving the rf signal from the feeding point 311, the antenna radiator may transmit the rf signal in the form of an electromagnetic wave at a low frequency. Correspondingly, in a receiving scenario, the antenna radiator may receive a low-frequency electromagnetic wave signal (i.e., a low-frequency electromagnetic wave), convert the low-frequency electromagnetic wave into an analog signal, and feed the analog signal back to the radio frequency module through the feeding point 311, thereby receiving the low-frequency signal.

In order to enable the first radiator 310 to radiate more frequency bands and thus be applicable to different communication environments, the feed circuit may further include a frequency band switching circuit, where the frequency band switching circuit is configured to selectively switch the feed frequency, so as to implement multiplexing of the antenna radiators. Illustratively, the band switching circuit may switch the feeding frequency so that the feeding circuit may feed various types of signals such as a low-frequency 5G signal, a low-frequency 4G signal, and the like to the feeding point 311. In other embodiments, the feed source 51 may feed signals in other frequency bands through a feed circuit, which is not limited herein.

As just one example, in the present embodiment, the feed 51 is used to feed a low frequency signal. The feed circuit may comprise a band switching circuit and a connection point for electrical connection with a feed 51 of the main board 50. The band switching circuit is used to feed signals of different bands to the feeding point 311.

The working principle of the antenna assembly 100 provided in this embodiment is that the feed source 51 feeds to the first feed point 311, so as to excite resonance on the first radiator 310, and meanwhile, a parasitic equidirectional current is formed on the second radiator 330, so as to excite resonance, so as to realize radio frequency radiation.

Referring to fig. 6, in order to better implement radio frequency radiation in more frequency bands, the electronic device 10 may further include a first switch circuit 360 for switching a radiation frequency band, one end of the first switch circuit 360 is electrically connected to the first radiator 310, the other end of the first switch circuit 360 is grounded, and a 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 a middle frame of the frame body 20. The first switch circuit 360 may be provided in any form, and is not limited herein. In one embodiment, a capacitor or an inductor may be disposed between the first switch circuit 360 and the ground, and the filter grounding is implemented by using the ac-dc characteristic of the capacitor or the ac-dc characteristic of the inductor. Of course, in other embodiments, the first switch circuit 360 may be directly connected to ground. The first switching circuit 360 may switch the radiation band of the first radiator 310.

For convenience of description, referring to fig. 6 again, the two ends of the second radiator 330 are a (a is the second grounding point 331) and b, 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.

Illustratively, when the first switching circuit 360 is in the open state, the antenna assembly 100 may have mode 1, mode 2, and mode 3. Fig. 7 shows the S-parameter and efficiency of the antenna assembly in the open state of the first switching circuit 360, with the abscissa representing the radiation frequency and the ordinate representing 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. As shown in fig. 7, the pattern 1 is a quarter-base film of the cf section in the first radiator 310, which can cover the B3 band, the pattern 2 is a quarter-base film of the ab section in the second radiator 330, which is accompanied by a stronger quarter-base mode of the cd section, and is used to cover the N41 and WIFI2.4G bands, the pattern 3 is a quarter-base mode of the cd section in the first radiator 310, which is accompanied by a stronger quarter-base mode of the ab section, and is used to cover the N78 band, and the whole antenna covers the B3-N41-WIFI2.4G-N78 band. The above is merely an example of a specific embodiment, and is not limited to the operating frequency bands of the first radiator 310 and the second radiator 330 in this embodiment, and in some other embodiments, the first radiator 310 and the second radiator 330 may also cover other operating frequency bands, which is not limited in this embodiment.

The mode 2 and the mode 3 are two common operating modes of the dual antenna, where the length of the ab segment may be greater than or equal to the length of the cd segment, that is, the length of the second radiator 330 between the second ground point 331 and the gap is greater than or equal to the length of the first radiator 310 between the feeding point 311 and the gap, and this embodiment may enable the mode 2 and the mode 3 to operate in different frequency bands, for example, the mode 2 is mainly resonated by the ab segment, the resonant frequency is in the N41-WIFI2.4G frequency band with relatively low frequency, and the mode 3 is mainly resonated by the cd segment, so the resonant frequency is in the N78 frequency band with relatively high frequency. Of course, in some other embodiments, the length of the second radiator 330 between the second ground point 331 and the space may be smaller than the length of the first radiator 310 between the feeding point 311 and the space, and the operating bands of the mode 2 and the mode 3 may be interchanged.

Fig. 8 illustrates the S-parameter and efficiency of the antenna assembly when the first switching circuit 360 is in a connected state, with the abscissa representing the radiation frequency and the ordinate representing 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. As shown in fig. 8, when the first switch circuit 360 is in the connected state, the mode 1 is still mainly the quarter-base mode of the cf band, but since the e-point switch is connected, there is a strong current from e to ground, so the frequency is shifted from the original B3 band to the B1 band; the mode 2 is mainly a quarter-base mode of an ab segment, and is accompanied by a stronger quarter-base mode of a cd segment, and is used for covering N41 and WIFI2.4G frequency bands, the mode 3 is mainly a quarter-base mode of a cd segment, and is accompanied by a stronger quarter-base mode of an ab segment, and is used for covering an N78 frequency band, because the mode 2 and the mode 3 mainly use minor nodes as ab and cd segments, a current return path introduced by the e-point switch communication mainly has an influence on a cf segment, and has almost no influence on the N41-WIFI2.4G-N78 frequency bands corresponding to the mode 2 and the mode 3, and at this time, the whole antenna assembly 100 can cover the B1-N41-WIFI2.4G-N78 frequency bands.

Referring to table 1, table 1 shows the total efficiency values at each operating frequency band when the first switching circuit 360 is in the on/off state.

As can be seen from the data in table 1, the antenna assembly 100 provided in this embodiment achieves multi-band resonance in a relatively narrow space, and has relatively good efficiency in each frequency band.

In another embodiment, referring to 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 a connection point of the second switch circuit 370 and the second radiator 330 is located between the second ground point 331 and the first radiator 310. The second switch circuit 370 may be configured in the same manner as the first switch circuit 360, which is not limited herein.

As shown in fig. 9, 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. Equivalent to that a ga section is formed by extending the side of the ab section of the second radiator 330 far away from the first radiator 310, the quarter fundamental mode resonance of the gb section can be realized by controlling the connection or disconnection of the second switch circuit 370, and then the LB section (such as the N28 section) is covered, and the resonance of N28-B3-N41-WIFI2.4G-N78 and N28-B1-N41-WIFI2.4G-N78 can be realized by matching with the first switch circuit 360.

The electronic device 10 may further have a plurality of SIM card slots, so that a user may install a plurality of SIM cards, where the plurality of SIM cards may be the same carrier or different carriers, part of the electronic device may be switched among different SIM cards according to a communication environment, and the user may also actively switch different SIM cards, which may cause signal interruption or attenuation of the antenna assembly 100 during the switching process.

Thus, in another embodiment, referring to fig. 10, the feed point 311 may include a first feed point 3111 and a second feed point 3112, the feed 51 includes a first feed 511 and a second feed 512, the first feed 511 is electrically connected to the first feed point 3111, the second feed 512 is electrically connected to the second feed point 3112, and the first feed point 3111 is located on a side of the second feed point 3112 away from the first ground point 312. The first feed 511 may operate in the MHB band, and the second feed 512 may operate in the N78 band.

The first feed 511 is electrically connected to the first feed point 311 through a feed circuit, and the second feed 512 is electrically connected to the second feed point 311 through a feed circuit. The feeding circuit may comprise a band switching circuit for switching different feeding bands such that the modes fed to the first feeding point 311 and the second feeding point 311 may be switched to excite resonances forming different bands. For example, the frequency band switching circuit may include an adjustable device such as a switch, an inductor, a variable capacitor, or a combination thereof, which is not limited herein. Fig. 11 shows a circuit diagram of several frequency band switching circuits, wherein the frequency band switching circuit may be selected from any one of the circuit structures shown in fig. 11, which is not limited herein, and of course, in other embodiments, the frequency band switching circuit may also have other structures, which are not limited herein.

For convenience of description, please refer to fig. 10 again, which illustrates that two ends of the second radiator 330 are a (a is the second grounding point 331) and b, two ends of the first radiator 310 are c and f (f is the first grounding point 312), the first feeding point 311 is d, and the second feeding point 311 is e.

The operation of the antenna assembly 100 is described below:

there are mainly two modes for the first feed 51 and figure 12 shows the S-parameter curve of the antenna assembly when fed by the first feed, with the abscissa representing the radiation frequency and the ordinate representing the radiation intensity. Referring to fig. 12, mode 1 is a 1/4 wavelength mode of the ab-band with strong reverse current of the cd-band, and mode 2 is a 1/4 wavelength mode of the cd-band. There are mainly 3 modes of operation for the second feed 51 and figure 13 shows the S-parameter curve of the antenna assembly when fed by the second feed, with the abscissa representing the radiation frequency and the ordinate representing the radiation intensity. Referring to fig. 13, mode 1 is a 1/4 wavelength mode of cf band, mode 2 is mainly a 1/4 wavelength mode of ce band accompanied by stronger equidirectional current of ab band from a to bottom, mode 3 is mainly a 1/4 wavelength mode of ab band accompanied by stronger opposite current of ce band, wherein the length of ab band can be 1/4 wavelength of mode 3.

Fig. 14 shows a system efficiency curve for the operation of the antenna assembly 100, wherein the abscissa represents radiation frequency and the ordinate represents radiation intensity. Curves a and C are a radiation efficiency curve and a system efficiency curve of the first feed 51 in operation, respectively, and curves B and D are a radiation efficiency curve and a system efficiency curve of the second feed 51 in operation, respectively. As can be seen from fig. 14, the first feed source 51 and the second feed source 51 can implement dual-wave coverage in the B41 frequency band and the wifi2.4g frequency band, and have wider bandwidth and higher sideband efficiency, and in the dual SIM card mode, in different SIM switching processes, the B41 frequency band and the wifi2.4g frequency band can both ensure good communication effect, and users can perform operations such as games and videos. The N78 frequency band and the B41 frequency band can be respectively generated by double feeding, the intermodulation interference is small in the double SIM card mode, and meanwhile, a combiner is not required to be arranged, so that the cost is further reduced.

In one embodiment, referring to fig. 10 again, the 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 a connection point of the third switch circuit 380 and the second radiator 330 is located between the second ground point 331 and the first radiator 310. The third switch circuit 380 may have the same structure as the first switch circuit 360 or the second switch circuit 370, or may have any one of a plurality of switch circuit structures as shown in fig. 11, which is not limited herein. By providing the third switch circuit 380, the band-pass ground of the N78 band can be added to the second radiator 330, and in a more specific embodiment, a 6.8nH inductor and a 0.3pF capacitor can be connected in series, which is a short-circuit ground path for N78, and has a large impedance to MHB, and thus has a small radiation effect on the MHB band.

In the electronic device 10 provided in this embodiment, the antenna assembly 100 may be disposed on the same side frame 23 of the key 80, so that the space of the electronic device 10 may be better utilized, and radiation in more frequency bands may be realized. The method is beneficial to the user to carry out operations such as games and videos.

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

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. An electronic device, comprising:

the antenna assembly comprises a frame body, wherein the frame body is provided with a key, a first radiator and a second radiator, the second radiator is arranged on one side, far away from the second radiator, of the first radiator, a gap is formed between the second radiator and the first radiator, the first radiator is provided with a feed point and a first grounding point, the first grounding point is arranged adjacent to the key, the second radiator is provided with a second grounding point, and the second grounding point is located at one end, far away from the first radiator, of the second radiator; and

the main board is provided with a feed source which is electrically connected with the feed point and used for exciting resonance on the first radiator and the second radiator, and the first grounding point and the second grounding point are grounded.

2. The electronic device according to claim 1, wherein the antenna assembly further comprises a first switch circuit for switching a radiation band, one end of the first switch circuit is electrically connected to the first radiator, the other end is grounded, and a connection point of the first switch circuit and the first radiator is located between the feed point and the first ground point.

3. The electronic device of claim 2, wherein the antenna assembly further comprises a second switch circuit having one end electrically connected to the second radiator and another end grounded, and wherein a connection point of the second switch circuit to the second radiator is located between a second ground point and the first radiator.

4. The electronic device of claim 2, wherein a length of the second radiator between the second ground point and the space is greater than or equal to a length of the first radiator between the feed point and the space.

5. The electronic device of claim 1, wherein the feed point comprises a first feed point and a second feed point, wherein the feed comprises a first feed and a second feed, wherein the first feed is electrically connected to the first feed point, wherein the second feed is electrically connected to the second feed point, and wherein the first feed point is located on a side of the second feed point remote from the first ground point.

6. The electronic device according to claim 5, wherein the first feeding point is electrically connected to the first feeding point through a feeding circuit, the second feeding point is electrically connected to the second feeding point through a feeding circuit, and the feeding circuit comprises a band switching circuit for switching different feeding bands.

7. The electronic device of claim 5, wherein the antenna assembly further comprises a third switch circuit, wherein one end of the third switch circuit is electrically connected to the first radiator, and the other end of the third switch circuit is grounded, and wherein a connection point of the third switch circuit to the second radiator is located between a second ground point and the first radiator.

8. The electronic device according to any one of claims 1 to 7, wherein the key includes an elastic member and a sliding portion, the frame is provided with a sliding slot, the sliding portion is slidably inserted into the sliding slot, one side of the sliding portion facing the inside of the electronic device is provided with a plurality of contact portions, one end of the elastic member is electrically connected to the main board, and when the sliding portion slides, one end of the elastic member away from the main board is electrically connected to one of the contact portions.

9. The electronic device according to claim 8, wherein the contact portion includes a slot disposed on a side of the sliding portion facing an inside of the electronic device, and an end of the elastic member away from the main board is selectively inserted into one of the slots.

10. The electronic device of claim 9, wherein the elastic member comprises a spring and a metal ball, one end of the spring is electrically connected to the main board, the other end of the spring is electrically connected to the metal ball, and the metal ball can be inserted into the slot.

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