CN111463576A

CN111463576A - Antenna assembly and electronic equipment

Info

Publication number: CN111463576A
Application number: CN202010297086.4A
Authority: CN
Inventors: 吴小浦
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-28
Anticipated expiration: 2040-04-15
Also published as: CN111463576B

Abstract

The embodiment of the application provides an antenna assembly and electronic equipment, wherein the antenna assembly is arranged on the electronic equipment and comprises a metal frame, a first signal source and a second signal source, the metal frame comprises a first side edge, a second side edge and a third side edge which are sequentially connected, a first gap is formed in the first side edge, a second gap is formed in the third side edge, a first feeding point, a second feeding point and a third feeding point are arranged on the second side edge, the first feeding point is close to the first side edge, the third feeding point is close to the third side edge, and the second feeding point is located between the first feeding point and the third feeding point; the first signal source is selectively connected with the first feeding point or the third feeding point through the switch; the second signal source is electrically connected with the second feed point. The antenna assembly provided by the embodiment of the application can realize the resonant modes of a plurality of frequency bands, can improve the space reuse rate of the metal frame antenna, and is favorable for realizing a carrier aggregation technology, a 4G wireless access network and a 5G-NR dual-connection technology.

Description

Antenna assembly and electronic equipment

Technical Field

The present application relates to the field of antenna technologies, and in particular, to an antenna assembly and an electronic device.

Background

With the development of communication technology, electronic devices such as smart phones are becoming more and more popular. The electronic equipment performs signal transmission through the built-in antenna assembly to realize functions of voice communication, navigation positioning, wireless internet access and the like. The radiator is an important component of the antenna assembly, and the design form and the position layout of the radiator in the mobile phone directly influence the communication performance of the antenna assembly.

In the related art, one or more slits are formed in the metal frame to divide the metal frame into a plurality of metal branches, so that a plurality of metal frame antennas can be formed, however, more metal branches are needed for signal radiation of a plurality of frequency bands, and the space reuse rate of the metal frame antennas is low.

Disclosure of Invention

The embodiment of the application provides an antenna assembly and electronic equipment, which can improve the space reuse rate of a metal frame antenna.

An embodiment of the present application provides an antenna assembly, includes:

the metal frame comprises a first side edge, a second side edge and a third side edge which are sequentially connected, wherein a first gap is formed in the first side edge, a second gap is formed in the third side edge, a first feeding point, a second feeding point and a third feeding point are arranged on the second side edge, the first feeding point is close to the first side edge, the third feeding point is close to the third side edge, and the second feeding point is located between the first feeding point and the third feeding point;

a first signal source for generating a first excitation current, the first signal source being selectively connected to the first feeding point or the third feeding point through a switch; when the first signal source is connected with the first feeding point, the first excitation current is used for exciting the first side edge and the second side edge to jointly realize a resonant mode of a first frequency band; when the first signal source is connected with the third feeding point, the first excitation current is used for exciting the second side edge and the third side edge to jointly realize a resonant mode of a first frequency band; and

and the second signal source is used for generating a second excitation current, the second signal source is electrically connected with the second feeding point, and the second excitation current is used for exciting the first side edge, the second side edge and the third side edge to jointly realize a resonance mode of a second frequency band.

An embodiment of the present application further provides an electronic device, including the antenna assembly and the circuit board as described above, where the first signal source, the second signal source, and the switch are disposed on the circuit board.

The antenna assembly provided by the embodiment of the application enables two signal sources to share one part of a metal frame to perform signal radiation so as to realize a resonance mode of multiple frequency bands by connecting the two signal sources with different feed points, can improve the space multiplexing rate of the metal frame antenna, and is beneficial to the realization of a carrier aggregation technology, a 4G wireless access network and a 5G-NR dual-connection technology.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

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 a metal bezel in the electronic device shown in fig. 1.

Fig. 3 is a first structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 4 is a first schematic diagram of the antenna assembly of fig. 3 in a free-space mode of operation.

Fig. 5 is a schematic diagram of a first switching circuit in the antenna assembly shown in fig. 3.

Fig. 6 is a second schematic diagram of the antenna assembly of fig. 3 in a free-space mode of operation.

Fig. 7 is a third schematic diagram of the antenna assembly of fig. 3 in a free-space mode of operation.

Fig. 8 is a schematic diagram of the antenna assembly of fig. 3 in a right-hand grip mode of operation.

Fig. 9 is a schematic diagram of the antenna assembly of fig. 3 in a left-handed operating mode.

Fig. 10 is a graph of S parameters for the antenna assembly of fig. 9 in a left-handed grip mode of operation.

Fig. 11 is a schematic diagram of a first matching circuit in the antenna assembly shown in fig. 3.

Fig. 12 is a second structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few 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.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. An electronic device such as electronic device 20 of fig. 1 may include a housing such as housing 200, circuit board 400, and antenna assembly 600. Circuit board 400 and antenna assembly 600 may be disposed on housing 200, and antenna assembly 600 may be used to receive and/or transmit global positioning signals, wireless fidelity signals, mobile communication signals such as 3G signals, 4G signals, or 5G signals, etc. It should be noted that the structure of the electronic device 20 is not limited to this, for example, the electronic device may further include a camera, a display screen, a sensor assembly, and the like.

The electronic device 20 may be a computing device such as a laptop computer, a computer monitor containing an embedded computer, a tablet computer, a cellular telephone, a media player, or other handheld or portable electronic devices, smaller devices (such as a wristwatch device, a hanging device, a headset or earpiece device, a device embedded in eyeglasses, or other device worn on the head of a user, or other wearable or miniature devices), a television, a computer display not containing an embedded computer, a gaming device, a navigation device, an embedded system (such as a system in which an electronic device with a display is installed in a kiosk or automobile), a device that implements the functionality of two or more of these devices, or other electronic devices. In the exemplary configuration of fig. 1, the electronic device 20 is a portable device, such as a cellular telephone, media player, tablet, or other portable computing device. It should be noted that fig. 1 is only an exemplary example.

The electronic device 20 may communicate using one or more communication technologies, for example, the electronic device 20 may communicate using one or more of Bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, wireless fidelity (Wi-Fi) communication technology, global system for mobile communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, long term evolution (L TE) communication technology, 5G communication technology, SUB-6G communication technology, and future other communication technologies.

The housing 200 is used to form the outer contour of the electronic device 20, and the housing 200 may have a regular shape, such as a rectangular parallelepiped structure or a rounded rectangular structure, or the housing 200 may have an irregular shape. The housing 200 may be formed from plastic, glass, ceramic, fiber composite, metal (e.g., stainless steel, aluminum, etc.), other suitable materials, or a combination of any two or more of these materials. The housing 200 may be integrally formed such that the housing 200 may be machined or molded as a single structure, or may be formed using a combination of structures (e.g., an inner frame structure forming one or more structures of an outer shell surface, etc.).

Referring to fig. 2, fig. 2 is a schematic structural diagram of a metal bezel in the electronic device shown in fig. 1. The case 200 may include a metal bezel such as the metal bezel 210, and the metal bezel 210 may be formed of a metal material such as stainless steel, aluminum, or the like. The metal frame 210 may include a plurality of sides, such as the metal frame 210 may include four sides, it should be noted that the number of the sides of the metal frame 210 is not limited thereto, and other numbers, such as five or six sides of the metal frame 210, may be provided.

The metal bezel 210 may be a regular shape, such as the metal bezel 210 being a rounded rectangular structure. As shown in fig. 2, the metal bezel 210 may include a first side 211, a second side 212, a third side 213 and a fourth side 214 connected in sequence, wherein the first side 211 is disposed opposite to the third side 213, and the second side 212 is disposed opposite to the fourth side 214. The first side 211 and the third side 213 are located at the side of the electronic device 20, the second side 212 is located at the top of the electronic device 20, and the fourth side 214 is located at the bottom of the electronic device 20.

The metal bezel 210 may be configured as part of the antenna assembly 600. The metal frame 210 may be provided with a slit structure with a small width, and the small width of the slit structure (e.g., 1 mm to 1.5 mm) may be equivalent to connecting a small capacitor in series between the metal frames at two sides of the slit. The gap structure may be filled with a material such as a polymer, ceramic, glass, or a combination of these materials. For example, the first side 211 may be provided with a first slit such as the first slit 215, the third side 213 may be provided with a second slit such as the second slit 216, and the first slit 215 and the second slit 216 may be symmetrically and separately disposed on the first side 211 and the third side 213, so that the metal frame 210 achieves the aesthetic requirement of symmetric slits in appearance. The second side 212 is not provided with a slit structure. Of course, in other embodiments, the second side 212 may also be provided with a slit structure.

As shown in fig. 3, fig. 3 is a first structural schematic diagram of an antenna assembly provided in the present application. The metal bezel 210 may be provided with one or more feed points, which may be used to feed an excitation current into the metal bezel 210 to cause the metal bezel 210 to implement one or more resonant modes. For example, the second side 212 may be provided with a first feeding point such as a first feeding point 212a, a second feeding point 212b and a third feeding point 212c, wherein the first feeding point 212a is disposed near the first side 211, the third feeding point 212c is disposed near the third side 213, and the second feeding point 212b is located between the first feeding point 212a and the third feeding point 212 c.

The antenna assembly 600 may also include one or more signal sources, for example the antenna assembly 600 may include a first signal source, such as the first signal source 610, and a second signal source, such as the second signal source 620, with both the first signal source 610 and the second signal source 620 disposed on the circuit board 400. The first signal source 610 may be configured to generate a first excitation current, the second signal source 620 may be configured to generate a second excitation current, the second signal source 620 is connected to the second feeding point 212b, and the second excitation current generated by the second signal source 620 is fed into the second side edge 212 through the second feeding point 212b, so that the second side edge 212 is sufficiently excited, and the second side edge 212 implements a resonant mode of the second frequency band. For example, the second side 212 may be excited by the second excitation current to implement a long term evolution mode of a low frequency band, wherein the low frequency band may include multiple frequency bands of 698MHz to 960 MHz.

The antenna assembly 600 may also include a switch such as switch 630, the switch 630 being disposed on the circuit board 400, the switch 630. The switch 630 may be a Single Pole Double Throw (SPDT) switch, and may have a movable end such as a movable end 631 and two fixed ends such as a first fixed end 632 and a second fixed end 633, where the movable end 631 is electrically connected to the first signal source 610, the first fixed end 631 may be connected to the first feeding point 212a through a cable or a microstrip line, and the second fixed end 633 may be connected to the third feeding point 212c through a cable or a microstrip line. The switch 630 may selectively connect the first signal source 610 to the first feeding point 212a or to the third feeding point 212c by connecting different stationary terminals through the movable terminal 631.

As shown in fig. 4, fig. 4 is a first structural schematic diagram of the antenna assembly shown in fig. 3 in a free space operating mode. In the free space operating mode, the electronic device 20 may control the movable end 631 of the switch 630 to be connected to the first stationary end 632, so that the first signal source 610 is connected to the first feeding point 212a, at this time, a first excitation current generated by the first signal source 610 is fed to the second side 212 through the first feeding point 212a, so that the second side 212 and the first side 211 are sufficiently excited, and thus the second side 212 and the first side 211 jointly implement a resonant mode of the first frequency band. For example, the first excitation current may excite the second side 212 and the first side 211 to jointly implement a long term evolution mode of a medium-high frequency band, where the medium-high frequency band includes multiple frequency bands of 1450-1500MHz, 1710MHz-2700MHz, 3300MHz-5000MHz, and the like. At this time, the second signal source 620 feeds the second excitation current from the second feeding point 212b, so that the portion from the first slot 215 to the second slot 216 in the metal bezel 210 realizes the resonance mode of the second frequency band. It is understood that the antenna assembly 600 may implement a resonance mode of the second frequency band, such as a long term evolution mode of the low frequency band, through the first side 211, the second side 212, and the third side 213.

Of course, the electronic device 20 may also control the movable end 631 of the switch 630 to be connected to the second fixed end 633, so that the first signal source 610 is connected to the third feeding point 212c, and at this time, the first excitation current generated by the first signal source 610 is fed to the second side 212 through the third feeding point 212c, so that the second side 212 and the third side 213 are sufficiently excited, and the second side 212 and the first side 211 jointly implement the resonant mode of the first frequency band. It can be understood that, in the free space operating mode, the electronic device 20 can select the first side 211 and the third side 213 to radiate signals with better performance according to the performance of the signal radiation of the first side 211 and the third side 213.

In the embodiment of the present application, the free space operation mode may refer to a scene in which the electronic device 20 is not held by a hand of a user. In this scenario, the side metal frames, especially the gaps on the side metal frames, are not touched by human body (e.g. hand-held touch).

The embodiment of the application connects the two signal sources with different feed points, so that the two signal sources can share one part of the metal frame to perform signal radiation to realize a resonance mode of multiple frequency bands, the space reuse rate of the metal frame antenna can be improved, and the implementation of a carrier aggregation technology, a 4G radio access network and a 5G-NR dual-connection technology is facilitated.

As shown in fig. 3, the second side 212 is further provided with a first connection point such as a first connection point 212d and a second connection point such as a second connection point 212e, the first connection point 212d is located between the first feeding point 212a and the second feeding point 212b, and the second connection point 212e is located between the second feeding point 212b and the third feeding point 212c, wherein the first connection point 212d is connected to one end of a first switching circuit such as the first switching circuit 640, and the other end of the first switching circuit 640 is grounded, the first switching circuit 640 can be switched between a grounded state and a non-grounded state, when the first switching circuit 640 is in a grounded state, the first connection point 212d corresponds to a grounded point, when the first switching circuit 640 is in a non-grounded state, the first connection point 212d is not grounded, the first switching circuit 640 can be used for switching the frequency band of the second frequency band, for example, the low frequency band switching circuit may be switched between the connection points of the second switching circuit 650, the second switching circuit may be switched between the low frequency band 650, the low frequency band switching circuit 650, the second switching circuit may be switched between the low frequency band 650, the second switching circuit 650, the non-grounded state, the second switching circuit 650, the second switching circuit may be switched between the low frequency band 650, the second switching circuit 7336 b, the non-grounded state, the second switching circuit 650, the non-grounded state, the non-grounded.

As shown in fig. 5, fig. 5 is a schematic structural diagram of a first switching circuit in the antenna assembly shown in fig. 3. The first switching circuit 640 may include a control switch such as the control switch 641 and a plurality of lumped elements, which may include a resistor, a capacitor, and an inductor. The control switch 641 may be a single-pole multi-throw switch, the control switch 641 may include a selection terminal such as the selection terminal 641a and two fixing terminals such as a first fixing terminal 641b and a second fixing terminal 641b, the two fixing terminals are respectively connected to two lumped elements, for example, the first fixing terminal 641b is electrically connected to the first lumped element 642a, the second fixing terminal 641b is electrically connected to the second lumped element 642b, and the electronic device 20 may control the connection of the first connection point 212d to one of the first lumped element 642a and the second lumped element 642b through the control switch 641, so that the first switching circuit 640 may be switched between the grounding state and the non-grounding state. The structure of the second switching circuit 650 may be the same as that of the first switching circuit 640.

The antenna assembly 600 may also include control circuitry, such as control circuitry, which may be disposed on the circuit board 400. The control circuit is connected to the switch 630 to control the switch 630, and thus to control the switch 630 to be electrically connected to one of the first feeding point 212a and the second feeding point 212 b. For example, the control circuit may be configured to control the movable terminal 631 of the switch 630 to be connected to the first stationary terminal 632 or may control the movable terminal 631 of the switch 630 to be connected to the second stationary terminal 633, so as to selectively connect the first signal source 610 to the first feeding point 212a or the third feeding point 212 c.

The control circuit is further electrically connected to the first switching circuit 640 and the second switching circuit 650, respectively, and the control circuit can control the first switching circuit 640 and the second switching circuit 650 so that the first switching circuit 640 and the second switching circuit 650 are in different states. For example, the control circuit may control the first switching circuit 640 to be connected to the 0 ohm resistor in the lumped elements, so that the first switching circuit 640 switches to the low resistance state to the ground, and the first connection point 212d connected to the first switching circuit 640 corresponds to the ground point. Of course, the control circuit may also control the first switching circuit 640 to be connected to the capacitor or the inductor so that the first switching circuit 640 switches to the low impedance state to the ground. It is understood that the present embodiment does not limit the device types in the lumped elements connected to the first switching circuit 640 as long as the first switching circuit 640 can be switched to the low resistance state to the ground. The control circuit may also be connected to other devices in the plurality of lumped elements by controlling the first switching circuit 640 such that the first switching circuit 640 is in a non-ground state. When the first switching circuit 640 is in the non-grounded state, the frequency adjustment of the first frequency band can be realized.

As shown in fig. 3, the first side 211 may be provided with one or more grounding points, e.g. the first side 211 may be provided with a first grounding point such as a first grounding point 211a, the first grounding point 211a being arranged away from the second side 212 with respect to the first slot 215. It is understood that the first ground point 211a is spaced from the end of the second side 212 near the first side 211 by a distance greater than the distance between the first slot 215 and the end of the second side 212 near the first side 211, so as to define a metal branch on the first side 211, which can be used to extend the bandwidth of the antenna. . For example, the first side 211 is divided by a first slot 215 into a first section connected to the second side 212 and a second section facing away from the second side 212, the first ground point 211a is disposed on the second section, and the first ground point 211a is disposed spaced apart from the first slot 215. The third side 213 may be provided with one or more grounding points, for example the third side 213 may be provided with a second grounding point such as a second grounding point 213a, the second grounding point 213a being arranged remote from the second side 212 with respect to the second slot 216. It will be appreciated that the second ground point 213a is spaced further from the end of the second side 212 adjacent the first side 211 than the second slot 216 is spaced further from the end of the second side 212 adjacent the first side 211, thereby defining a metal stub on the third side 213 that can be used to extend the antenna bandwidth. For example, the third side 213 is divided by the second slit 216 into a third section and a fourth section, the third section is connected to the second side 212, the fourth section is away from the second side 212, the second ground point 213a is disposed on the fourth section, and the second ground point 213a is disposed at a distance from the second slit 216.

Wherein the control circuit may be configured to acquire occlusion state information of the first slit 215 and the second slit 261, and control connection states of the first signal source 610, the first switching circuit 640, and the second switching circuit 650 according to the occlusion state information. The shielding state information of the first slot 215 and the second slot 261 may be obtained by obtaining a Received Signal Strength Indication (RSSI) of the metal branch radiator adjacent to the corresponding slot, and when the RSSI is less than a preset threshold, it may be determined that the corresponding slot is shielded, for example, the position of the slot is held by a hand, so as to obtain the corresponding shielding state information.

Fig. 6 is a second schematic diagram of the antenna assembly of fig. 3 in a free-space mode of operation, as shown in fig. 6. In the free space operation mode, the control circuit can control the movable terminal 631 of the switch 630 to be connected to the first stationary terminal 632, so that the first signal source 610 is connected to the first feeding point 212 a. The control circuit also controls the first switching circuit 640 to be switched to the grounded state, and the second switching circuit 650 to be switched to the non-grounded state, for example, the first switching circuit 640 may be grounded by connecting a resistor of 0 ohm (or grounded by connecting a large capacitor or a small inductor to make the first switching circuit 640 in a low-resistance state), and the second switching circuit 650 may be connected to a predetermined lumped element to make the non-grounded state. At this time, the first signal source 610 feeds the first excitation current from the first feeding point 212a to the second side 212 and forms a complete current loop to the first grounding point 211a through the first slot 215, so that the portion from the first feeding point 212a to the first connecting point 212d in the metal frame 210 is sufficiently excited. And the second signal source 620 is connected to the second feeding point 212b, and the second driving current generated by the second signal source 620 is fed from the second feeding point 212b and grounded from the first connection point 212d to form a complete current loop, so that the portion from the second feeding point 212b to the first connection point 212d in the metal bezel 210 is fully driven. Meanwhile, the second excitation current is fed from the second feeding point 212b and flows through the second slot 216 to the second grounding point 213a to form another complete current loop, so that the portion from the second feeding point 212b to the second grounding point 213a in the metal frame 210 is sufficiently excited, and the resonance mode of the second frequency band is realized together with the portion from the second feeding point 212b to the first connecting point 212d in the metal frame 210. It is to be understood that the control circuit may be configured to control the first signal source 610 to be electrically connected with the first feeding point 212a, the first switching circuit 640 to be switched to the ground state and the second switching circuit 650 to be switched to the non-ground state if the occlusion state information indicates that neither the first slot 215 nor the first slot 216 is occluded.

The control circuit may be further configured to control the first signal source 610 to be electrically connected with the third feeding point 212c, the first switching circuit 640 to be switched to the non-grounded state and the second switching circuit 650 to be switched to the grounded state if the shielding state information indicates that neither the first slot 215 nor the first slot 216 is shielded. For example, as shown in fig. 7, fig. 7 is a third structural diagram of the antenna assembly shown in fig. 3 in a free space mode of operation. In the free space operation mode, the control circuit may control the movable terminal 631 of the switch 630 to be connected with the second stationary terminal 633, so that the first signal source 610 is connected with the third feeding point 212 c. The control circuit also controls the first switching circuit 640 to switch to the non-grounded state and the second switching circuit 650 to switch to the grounded state, for example, the first switching circuit 640 may be connected to a predetermined lumped element to realize non-grounded state and the second switching circuit 650 may be connected to a 0 ohm resistor to realize grounded state, or connected to a large capacitor or a small inductor to make the second switching circuit 650 in a low-impedance state to realize grounded state. At this time, the first signal source 610 feeds the first excitation current from the third feeding point 212c to the second side 212 and is grounded via the second connection point 212e to form a complete current loop, so that the portion from the third feeding point 212c to the second connection point 212e in the metal bezel 210 is sufficiently excited. Meanwhile, the first excitation current is fed from the third feeding point 212c and flows through the second slot 216 to the second grounding point 213a to form another complete current loop, so that the portions from the second connection point 212e to the second grounding point 213a in the metal frame 210 jointly implement the resonant mode of the first frequency band. And the second signal source 620 is connected to the second feeding point 212b, and the second driving current generated by the second signal source 620 is fed from the second feeding point 212b and grounded to the first grounding point 211a through the first slot 215 to form a complete current loop, so that the portion of the metal frame 210 from the second feeding point 212b to the first grounding point 211a is fully driven. Meanwhile, a second excitation current generated by the second signal source 620 is fed from the second feeding point 212b and grounded through the second connection point 212e to form another complete current loop, so that the portion from the second feeding point 212b to the second connection point 212e in the metal frame is sufficiently excited to realize a resonant mode of the second frequency band together with the portion from the second feeding point 212b to the first ground point 211a in the metal frame 210.

The control circuit may be further configured to control the first signal source 610 to be electrically connected with the first feeding point 212a, the first switching circuit 640 to be switched to the non-grounded state and the second switching circuit 650 to be switched to the grounded state if the shielding state information indicates that the first slot 215 is shielded and the first slot 216 is not shielded. For example, as shown in fig. 8, fig. 8 is a schematic diagram of the antenna assembly of fig. 3 in a right-hand grip mode of operation. When the antenna assembly 600 is in the right-hand-held operation mode, the second slot 216 on the third side 213 is blocked by the palm, and the first slot 215 on the first side 211 is open, so that the radiation efficiency of the antenna assembly 600 is significantly reduced if the third side 213 is used as a radiator for signal radiation. When the antenna assembly 600 is in the right-hand grip operation mode, the control circuit can control the movable end 631 of the switch 630 to connect with the first stationary end 632, so that the first signal source 610 is connected with the first feeding point 212 a. The control circuit also controls the first switching circuit 640 to switch to the non-grounded state and the second switching circuit 650 to switch to the grounded state, for example, the non-grounded state can be realized by connecting the first switching circuit 640 with a predetermined lumped element, and the grounded state can be realized by connecting the second switching circuit 650 with a 0 ohm resistor. At this time, the first signal source 610 feeds the first excitation current from the first feeding point 212a to the second side 212 and connects to the second grounding point 213a through the first slot 215 to form a complete current loop, so that the portion from the first feeding point 212a to the first grounding point 211a in the metal frame 210 is sufficiently excited. Meanwhile, the first excitation current is fed from the first feeding point 212a and grounded through the second connection point 212e to form another complete current loop, so that the first feeding point 212a in the metal bezel 210 is fed and sufficiently excited through the second connection point 212e, and a resonant mode of the first frequency band is realized together with a portion from the first feeding point 212a to the first ground point 211a in the metal bezel 210. And the second signal source 620 is connected to the second feeding point 212b, and the second driving current generated by the second signal source 620 is fed from the second feeding point 212b and grounded through the second connection point 212e to form a complete current loop, so that the portion of the metal bezel 210 from the second feeding point 212b to the second connection point 212e is fully driven. Meanwhile, a second excitation current generated by the second signal source 620 is fed from the second feeding point 212b and grounded to the first ground point 211a through the first slot 215 to form another complete current loop, so that a portion from the second feeding point 212b to the first ground point 211a in the metal frame is sufficiently excited to realize a resonant mode of the second frequency band together with a portion from the second feeding point 212b to the second connection point 212e in the metal frame 210.

The control circuit may be further configured to control the first signal source 610 to be electrically connected with the third feeding point 212c, the first switching circuit 640 to be switched to the grounded state and the second switching circuit 650 to be switched to the non-grounded state if the shielding state information indicates that the first slot 215 is not shielded and the first slot 216 is shielded. For example, as shown in fig. 9, fig. 9 is a schematic structural diagram of the antenna assembly shown in fig. 3 in a left-handed operation mode. When the antenna assembly 600 is in the left-hand holding mode, the first slot 215 on the first side 211 is blocked by the palm, and the second slot 216 on the third side 213 is open, so that the radiation efficiency of the antenna assembly 600 is significantly reduced if the first side 211 is used as a radiator for signal radiation. When the antenna assembly 600 is in the left-hand holding mode of operation, the control circuit can control the movable terminal 631 of the switch 630 to be connected to the second stationary terminal 633, so that the first signal source 610 is connected to the third feeding point 212 c. The control circuit also controls the first switching circuit 640 to be switched to a grounded state and the second switching circuit 650 to be switched to an ungrounded state, for example, by connecting the first switching circuit 640 to a 0 ohm resistor for grounding and connecting the second switching circuit 650 to a predetermined lumped element for ungrounded. At this time, the first signal source 610 feeds the first excitation current from the third feeding point 212c to the second side 212 and is grounded via the second connection point 212e to form a complete current loop, so that the portion from the third feeding point 212c to the second ground point 213a in the metal bezel 210 is sufficiently excited. Meanwhile, the first excitation current is fed from the third feeding point 212c and grounded through the first connection point 212d to form another complete current loop, so that the portion from the third feeding point 212c to the first connection point 212d in the metal frame 210 is sufficiently excited, and the resonant mode of the first frequency band is realized together with the portion from the third feeding point 212c to the second ground point 213a in the metal frame 210. And the second signal source 620 is connected to the second feeding point 212b, and the second driving current generated by the second signal source 620 is fed from the second feeding point 212b and grounded through the first connection point 212d to form a complete current loop, so that the portion from the second feeding point 212b to the first connection point 212d in the metal bezel 210 is fully driven. Meanwhile, a second excitation current generated by the second signal source 620 is fed from the second feeding point 212b and grounded to the second ground point 213a through the second slot 216 to form another complete current loop, so that a portion from the second feeding point 212b to the second connection point 212e in the metal bezel is sufficiently excited to realize a resonant mode of the second frequency band together with a portion from the second feeding point 212b to the second connection point 212e in the metal bezel 210.

As shown in fig. 10, fig. 10 is a graph of S parameters of the antenna assembly of fig. 9 in a left-handed grip mode of operation. A curve S11 in fig. 10 represents a resonance mode of the second band, a curve S22 represents a resonance mode of the first band, and a curve S12 represents an isolation of the second feeding point 212b from the first feeding point 212 a. As can be seen from the curve S12, the isolation from the second feeding point 212b to the first feeding point 212a is below-18 dB, and the specification shows that the first frequency band and the second frequency band have relatively good isolation therebetween, and the resonant mode of the first frequency band and the resonant mode of the second frequency band have relatively strong interference rejection capability.

Referring to fig. 3 and 11, fig. 11 is a schematic structural diagram of a first matching circuit in the antenna assembly shown in fig. 3. The antenna assembly 600 further includes a first matching circuit such as a first matching circuit 660, a second matching circuit such as a second matching circuit 670, and a third matching circuit such as a third matching circuit 680, the first matching circuit 660 is connected between the first feeding point 212a and the switch 630, the first matching circuit 660 is configured to implement impedance matching between the metal bezel 210 and the first signal source 610, and may also be configured to block interference signals other than the first frequency band, for example, signals in the second frequency band. The second matching circuit 670 is connected between the second feeding point 212b and the second signal source 620, and the second matching circuit 670 may be used to implement impedance matching between the metal bezel 210 and the first signal source 610, and may also be used to block interference signals other than the second frequency band, for example, signals in the first frequency band from passing. The third matching circuit 680 is connected between the third feeding point 212c and the switch 630, and the third matching circuit 680 may be used to implement impedance matching between the metal bezel 210 and the first signal source 610, and may also be used to block interference signals other than the first frequency band, for example, signals in the second frequency band.

The first matching circuit 660 may include a first inductor L1, a second inductor L2, a capacitor C, and a variable capacitor T1, the first inductor L I is connected between the first feeding point 212a and the first stationary end 632 of the switch 630, the variable capacitor T1 is connected in parallel to the first inductor L1, one end of the second inductor L2 is connected to the first inductor L1, the other end of the second inductor L2 is connected to one end of the capacitor C, and the other end of the capacitor C is grounded, the variable capacitor T1 may adjust the frequency of the first frequency band by changing a capacitance value, the first matching circuit 660 has a filtering function, and may filter out interference signals except the first frequency band, the structure of the third matching circuit 680 is the same as that of the first matching circuit 660, and of course, the structure of the third matching circuit 680 may also be different from that of the first matching circuit 680.

As shown in fig. 12, fig. 12 is a schematic diagram of a second structure of an antenna assembly according to an embodiment of the present disclosure, for example, the antenna assembly 600 may further include one or more tuning switches, and the tuning switches may be configured to switch a radiation frequency band on the metal bezel 210, for example, the first side 211 is provided with a third connection point such as a third connection point 211b, and the third connection point 211b is disposed between the first slot 215 and the first ground point 211a, it may be understood that the first tuning switch 691 is disposed between the first slot 215 and the first ground point 211a, when the first side 211 is configured to receive and transmit a resonant signal of the first frequency band, the first tuning switch 691 may switch the first frequency band of the first side 211, for example, between a high frequency band such as L TEB32, 8 2 TEB3, L TEB39, L TEB28, L TEB1, L TEB40, L TEB5, N78, or N79, and when the first side 211 is configured to receive and transmit a signal of the second frequency band, for example, the tuning switch 5926 b may switch.

The third side 213 is provided with a fourth connection point such as a fourth connection point 213b, and the fourth connection point 213b is disposed between the second grounding point 213 a. it is understood that the second tuning switch 692 is disposed between the second gap 216 and the second grounding point 213 a. when the second side 212 is used for transceiving a resonant signal of the first frequency band, the second tuning switch 692 may switch the first frequency band of the first side 211, for example, between the high frequency bands of L TEB32, L TEB3, L0 TEB39, L TEB28, L TEB1, L TEB40, L TEB41, N78, or N79, and when the first side 211 is used for transceiving a resonant signal of the second frequency band, the first tuning switch 691 may switch the second frequency band of the first side 211, for example, between the low frequency bands of L TEB5, L TEB8, L TEB20, L b28, and the like.

The antenna assembly and the electronic device provided by the embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An antenna assembly, comprising:

2. The antenna assembly of claim 1, wherein the second side is provided with a first connection point and a second connection point, the first connection point being located between the first feed point and the second feed point, the second connection point being located between the second feed point and the third feed point;

the antenna assembly further comprises a first switching circuit and a second switching circuit, wherein one end of the first switching circuit is connected with the first connecting point, the other end of the first switching circuit is grounded, one end of the second switching circuit is connected with the second connecting point, the other end of the second switching circuit is grounded, and the first switching circuit and the second switching circuit can be switched between a grounded state and a non-grounded state respectively.

3. The antenna assembly of claim 2, wherein the first side is provided with a first ground point disposed away from the second side with respect to the first slot, and the third side is provided with a second ground point disposed away from the second side with respect to the second slot.

4. The antenna assembly of claim 3, further comprising a control circuit connected to the switch, the first switching circuit, and the second switching circuit, respectively, the control circuit configured to obtain occlusion state information of the first slot and the second slot, and to control a connection state of the first signal source, the first switching circuit, and the second switching circuit according to the occlusion state information.

5. The antenna assembly of claim 4, wherein the control circuit is configured to control the first signal source to be electrically connected to the first feed point and the first switching circuit to be switched to a grounded state and the second switching circuit to be switched to an ungrounded state, or to control the first signal source to be electrically connected to the third feed point and the first switching circuit to be switched to an ungrounded state and the second switching circuit to be switched to a grounded state, if the shielding state information indicates that neither the first slot nor the second slot is shielded.

6. The antenna assembly of claim 4, wherein the control circuit is configured to control the first signal source to be electrically connected with the first feed point, the first switching circuit to switch to an ungrounded state and the second switching circuit to switch to a grounded state if the occlusion state information indicates that the first slot is not occluded and the second slot is occluded.

7. The antenna assembly of claim 4, wherein the control circuit is configured to control the first signal source to be electrically connected with the third feed point, the first switching circuit to switch to a grounded state and the second switching circuit to switch to an ungrounded state if the shielding state information indicates that the first slot is shielded and the second slot is not shielded.

8. The antenna assembly of any one of claims 1 to 7, further comprising a first matching circuit, a second matching circuit, and a third matching circuit, the first matching circuit being connected between the first feed point and the switch, the third matching circuit being connected between the third feed point and the switch, the second matching circuit being connected between the second feed point and the second signal source.

9. The antenna assembly of claim 8, wherein the first matching circuit and the third matching circuit are identical in structure, and wherein the first matching circuit comprises a first inductor, a second inductor, a capacitor, and a variable capacitor, the first inductor is connected between the first feed point and the switch, the variable capacitor is connected in parallel with the first inductor, one end of the second inductor is connected to the first inductor, the other end of the second inductor is connected to one end of the capacitor, and the other end of the capacitor is connected to ground.

10. The antenna assembly of any one of claims 3-7, further comprising a first tuning switch disposed on the first side between the first ground point and the first slot and a second tuning switch disposed on the third side between the second ground point and the second slot.

11. An electronic device comprising an antenna assembly according to any one of claims 1 to 10 and a circuit board, the first signal source, the second signal source and the switch being disposed on the circuit board.