Antenna system and electronic equipment

Abstract

The invention provides an antenna system and electronic equipment, and belongs to the technical field of antennas. The antenna system comprises a first low-frequency antenna, a second low-frequency antenna, a third low-frequency antenna and a fourth low-frequency antenna; the first low-frequency antenna is located at the bottom of the electronic equipment; the second low-frequency antenna and the third low-frequency antenna are respectively positioned in partial areas, close to the bottom, of the first side part and the second side part of the electronic equipment; and the fourth low-frequency antenna is positioned in a partial region, close to the top of the electronic equipment, of the first side part or the second side part. According to the antenna system, the low-frequency antenna performance of the electronic equipment can be improved, the performance of other antennas of the electronic equipment can be improved, and the wireless communication performance of the electronic equipment can be comprehensively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, in particular to an antenna system and an electronic device. BACKGROUND

[0002] Low frequency (650-1000MHz) is an essential frequency band in 2 / 3 / 4 / 5G communication technology, which plays an important role in mobile communication systems. At the same time, the low frequency antenna applied to cover the low frequency band has the advantages of natural wide coverage and small propagation loss.

[0003] In related technologies, in order to meet the communication demand of the low frequency band, three or more low frequency antennas are arranged in the electronic device. However, due to the larger length of the low frequency antenna, the required stacking space is larger, and the available stacking space of other antennas is compressed, resulting in space conflict between the low frequency antenna and other antennas. SUMMARY

[0004] The present application provides an antenna system and an electronic device, which can solve the problem of large space occupied by the low frequency antenna and space conflict between the low frequency antenna and other antennas.

[0005] The technical solution is as follows:

[0006] On the one hand, an antenna system is provided, which comprises a first low frequency antenna, a second low frequency antenna, a third low frequency antenna and a fourth low frequency antenna.

[0007] The first low frequency antenna is located at the bottom of the electronic device; the second low frequency antenna and the third low frequency antenna are respectively located at the part of the first side and the second side of the electronic device close to the bottom; and the fourth low frequency antenna is located at the part of the first side or the second side close to the top of the electronic device.

[0008] In some embodiments, a mainboard module is arranged in the electronic device, and the mainboard module is arranged close to the top of the electronic device.

[0009] The mainboard module is provided with a radio frequency module.

[0010] The first low frequency antenna, the second low frequency antenna, the third low frequency antenna and the fourth low frequency antenna are respectively electrically connected with the radio frequency module.

[0011] In some embodiments, at least part of the fourth low frequency antenna overlaps the mainboard module in the horizontal direction, and the fourth low frequency antenna is electrically connected with the radio frequency module through a metal spring.

[0012] The top ends of the second low-frequency antenna and the third low-frequency antenna are not overlapped with the main board module along a horizontal direction, and the first low-frequency antenna, the second low-frequency antenna and the fourth low-frequency antenna are respectively electrically connected with the radio frequency module through signal transmission lines.

[0013] The first low-frequency antenna and the fourth low-frequency antenna are used for transmitting and receiving radio waves, and the second low-frequency antenna and the third low-frequency antenna are used for receiving radio waves.

[0014] In some embodiments, the radio frequency module comprises a radio frequency chip, a first radio frequency switch and a radio frequency front-end component, the first low-frequency antenna and the fourth low-frequency antenna are respectively electrically connected to the first radio frequency switch, the first radio frequency switch is electrically connected to the radio frequency front-end component, the radio frequency front-end component is electrically connected to the radio frequency chip, and the first radio frequency switch is used for switching the receiving state and the transmitting state of the first low-frequency antenna and the fourth low-frequency antenna.

[0015] In some embodiments, a sub-board module is further arranged in the electronic device, and the sub-board module is arranged close to the bottom of the electronic device.

[0016] A signal optimization module is arranged on the sub-board module, one end of the signal optimization module is electrically connected to the radio frequency module through a signal transmission line, and the other end of the signal optimization module is electrically connected to at least one of the second low-frequency antenna and the third low-frequency antenna.

[0017] In some embodiments, the signal optimization module comprises a first low-noise amplifier and a second low-noise amplifier, the first low-noise amplifier is electrically connected between the radio frequency module and the second low-frequency antenna, and the second low-noise amplifier is electrically connected between the radio frequency module and the third low-frequency antenna.

[0018] In some embodiments, the first low-frequency antenna comprises a first radiator located in the middle of the bottom, and a second radiator and / or a third radiator located at both ends of the bottom, the second radiator and the first radiator are arranged apart from each other through a first break, and the third radiator and the first radiator are arranged apart from each other through a second break; the ends of the second radiator and the third radiator, which are away from the first radiator, are respectively grounded.

[0019] In some embodiments, the first radiator is provided with a first connection point and a second connection point, and the third radiator comprises a third connection point; the first connection point is located at a position of the first radiator close to the second break, the second connection point is located between the first connection point and the first break, and the third connection point is located at a position of the third radiator close to the second break.

[0020] The first low-frequency antenna further comprises a first matching circuit, a second matching circuit and a third matching circuit, the first matching circuit is electrically connected to the first connection point, the second matching circuit is electrically connected to the second connection point, and the third matching circuit is electrically connected to the third connection point.

[0021] In some embodiments, the first matching circuit comprises a first inductor, a second inductor, a first capacitor and a second capacitor; one end of the first inductor is electrically connected to the radio frequency module, the other end of the first inductor is electrically connected to one end of the first capacitor and one end of the second capacitor respectively, the other end of the first capacitor is grounded, and the other end of the second capacitor is electrically connected to the first connection point and one end of the second inductor respectively; the other end of the second inductor is grounded.

[0022] The second matching circuit comprises a second radio frequency switch, a third inductor, a fourth inductor, a fifth inductor, a third capacitor and a fourth capacitor; the input end of the second radio frequency switch and one end of the third inductor are electrically connected to the second connection point at the same time, the output end of the second radio frequency switch is grounded through the fourth inductor, the fifth inductor, the third capacitor and the fourth capacitor respectively, and the other end of the third inductor is grounded.

[0023] The third matching circuit comprises a third radio frequency switch, a sixth inductor and a seventh inductor; one end of the third radio frequency switch and one end of the sixth inductor are electrically connected to the third connection point at the same time, the other end of the sixth inductor is grounded, and the other end of the third radio frequency switch is grounded through the seventh inductor.

[0024] In some embodiments, the fourth low-frequency antenna comprises a fourth radiator close to the top portion, and a fifth radiator located at the bottom end of the fourth radiator, the fifth radiator and the bottom end of the fourth radiator are arranged apart by a third break, the top end of the fourth radiator is grounded, and the bottom end of the fifth radiator is grounded.

[0025] In some embodiments, the fourth radiator is provided with a fourth connection point and a fifth connection point, the fourth connection point is close to the top end of the fourth radiator, and the fifth connection point is close to the bottom end of the fifth radiator.

[0026] The fourth low-frequency antenna further comprises a fourth matching circuit and a fifth matching circuit, the fourth matching circuit is electrically connected to the fourth connection point, and the fifth matching circuit is electrically connected to the fifth connection point.

[0027] In some embodiments, the fourth matching circuit includes a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth inductor, a ninth inductor, a tenth inductor, an eleventh inductor, a twelfth inductor, and a fourth radio frequency switch; one end of the fifth capacitor and one end of the eighth inductor are electrically connected to the radio frequency module at the same time, the other end of the fifth capacitor is grounded, the other end of the eighth inductor is electrically connected to one end of the sixth capacitor and one end of the seventh capacitor respectively, the other end of the sixth capacitor is electrically connected to an input end of the fourth radio frequency switch, one end of the twelfth inductor, and the fourth connection point respectively, the other end of the seventh capacitor is electrically connected to one output end of the fourth radio frequency switch, the remaining output ends of the fourth radio frequency switch are grounded through the ninth inductor, the tenth inductor, and the eleventh inductor respectively, and the other end of the twelfth inductor is grounded.

[0028] The fifth matching circuit includes a fifth radio frequency switch, a thirteenth inductor, a fourteenth inductor, a fifteenth inductor, an eighth capacitor, and a ninth capacitor; the input end of the fifth radio frequency switch is electrically connected to one end of the thirteenth inductor and the fifth connection point respectively, and the output end of the fifth radio frequency switch is grounded through the eighth capacitor, the ninth capacitor, the fourteenth inductor, and the fifteenth inductor respectively, and the other end of the thirteenth inductor is grounded.

[0029] In some embodiments, the second low-frequency antenna includes a sixth radiator and a sixth matching circuit.

[0030] The top end of the sixth radiator is provided with a fourth break, and the bottom end of the sixth radiator is grounded; the sixth radiator is provided with a sixth connection point.

[0031] The sixth matching circuit includes a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a sixteenth inductor, a seventeenth inductor, and a sixth radio frequency switch; one end of the tenth capacitor and one end of the eleventh capacitor are electrically connected to the sixth connection point at the same time, the other end of the tenth capacitor is electrically connected to one input end of the sixth radio frequency switch, the other input end of the sixth radio frequency switch is electrically connected to the radio frequency module, the other end of the eleventh capacitor is electrically connected to one output end of the sixth radio frequency switch, and the other three output ends of the sixth radio frequency switch are grounded through the sixteenth inductor, the twelfth capacitor, and the seventeenth inductor respectively.

[0032] In some embodiments, the third low-frequency antenna includes a seventh radiator and a seventh matching circuit.

[0033] The top end of the seventh radiator is provided with a fifth break, and the bottom end of the seventh radiator is grounded; the seventh radiator is provided with a seventh connection point.

[0034] The seventh matching circuit includes an eighteenth inductor, a nineteenth inductor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, and a seventh RF switch. One end of the eighteenth inductor and the input terminal of the seventh RF switch are electrically connected to the seventh connection point. The other end of the eighteenth inductor is electrically connected to the RF module, one end of the nineteenth inductor, one end of the thirteenth capacitor, and one end of the fourteenth capacitor, respectively. The other end of the nineteenth inductor is grounded. The other ends of the thirteenth capacitor and the fourteenth capacitor are electrically connected to the two output terminals of the seventh RF switch, respectively. The other two output terminals of the seventh RF switch are grounded through the fifteenth capacitor and the sixteenth capacitor, respectively.

[0035] In some embodiments, the antenna system further includes at least one easily interfered antenna located on the top of the electronic device, and / or a portion of the first side or the second side near the top of the electronic device;

[0036] The at least one easily interfered antenna includes one or more of the following: GPS antenna, Wi-Fi antenna, Bluetooth antenna, 4GMHB antenna, 5GMHB antenna, and N78 antenna.

[0037] On the other hand, an electronic device is provided, which includes the antenna system described in this application.

[0038] In some embodiments, the electronic device further includes a device mid-frame;

[0039] The device frame includes a bottom frame, a first side frame, a second side frame, and a top frame. The bottom frame is located at the bottom of the electronic device, and at least a portion of the bottom frame forms the first low-frequency antenna. The first side frame is located on a first side of the electronic device, and at least a portion of the first side frame forms the second low-frequency antenna. The second side frame is located on a second side of the electronic device, and at least a portion of the second side frame forms the third low-frequency antenna. At least a portion of either the first side frame or the second side frame also forms the fourth low-frequency antenna. The top frame is located at the top of the electronic device.

[0040] The beneficial effects of the technical solution provided in this application include at least the following:

[0041] The antenna system provided by the application has four low-frequency antennas, i.e., a first low-frequency antenna, a second low-frequency antenna, a third low-frequency antenna and a fourth low-frequency antenna, which can meet the communication demand of the electronic device on the low-frequency band. The first low-frequency antenna is arranged at the bottom of the electronic device, and the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna are arranged at two sides of the electronic device, respectively. The space in the middle and lower part of the electronic device is fully utilized, and the space in the upper part of the electronic device is less occupied. The low-frequency antennas radiate by using the eigenmode of the middle frame floor body of the electronic device, and the communication efficiency can be kept good in the palm holding state. The space in the upper part of the electronic device is reserved for arranging other antennas, so that the low-frequency antenna performance of the electronic device is improved, and the performance of other antennas of the electronic device is also improved, and the wireless communication performance of the electronic device is comprehensively improved. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0043] Figure 1 is a structural schematic diagram of an antenna system and an electronic device provided by an embodiment of the application;

[0044] Figure 2 is a connection relationship diagram of an antenna system and a mainboard module provided by an embodiment of the application;

[0045] Figure 3 is an architecture schematic diagram of an antenna system provided by an embodiment of the application;

[0046] Figure 4 is a structural schematic diagram of an antenna system and an electronic device provided by another embodiment of the application;

[0047] Figure 5 is a structural schematic diagram of a first low-frequency antenna provided by an embodiment of the application;

[0048] Figure 6 is a structural schematic diagram of a fourth low-frequency antenna provided by an embodiment of the application;

[0049] Figure 7 is a structural schematic diagram of a second low-frequency antenna provided by an embodiment of the application;

[0050] Figure 8 is a structural schematic diagram of a third low-frequency antenna provided by an embodiment of the application;

[0051] Figure 9is a S11 test effect diagram of the first low-frequency antenna provided by an embodiment of the present application;

[0052] Figure 10 is an efficiency test effect diagram of the first low-frequency antenna provided by an embodiment of the present application;

[0053] Figure 11 is a S11 test effect diagram of the fourth low-frequency antenna provided by an embodiment of the present application;

[0054] Figure 12 is an efficiency test effect diagram of the fourth low-frequency antenna provided by an embodiment of the present application;

[0055] Figure 13 is a S11 test effect diagram of the second low-frequency antenna provided by an embodiment of the present application;

[0056] Figure 14 is an efficiency test effect diagram of the second low-frequency antenna provided by an embodiment of the present application;

[0057] Figure 15 is a S11 test effect diagram of the third low-frequency antenna provided by an embodiment of the present application;

[0058] Figure 16 is an efficiency test effect diagram of the third low-frequency antenna provided by an embodiment of the present application;

[0059] Figure 17 is a structural schematic diagram of an electronic device provided by another embodiment of the present application.

[0060] The reference signs in the drawings represent respectively:

[0061] 100, an electronic device; 200, a mainboard module; 300, a subboard module; 400, a battery module;

[0062] 1001, a bottom; 1002, a first side; 1003, a second side; 1004, a top;

[0063] 2001, a radio frequency module; 2002, a radio frequency chip; 2003, a first radio frequency switch; 2004, a radio frequency front-end component;

[0064] 3001, a signal optimization module; 3002, a first low-noise amplifier; 3003, a second low-noise amplifier;

[0065] 1, a first low-frequency antenna;

[0066] 11, first radiator; 111, first connection point; 112, second connection point; 12, second radiator; 13, third radiator; 131, third connection point; 14, first split; 15, second split; 16, first matching circuit; 161, first inductor; 162, second inductor; 163, first capacitor; 164, second capacitor; 17, second matching circuit; 171, second radio frequency switch; 172, third inductor; 173, fourth inductor; 174, fifth inductor; 175, third capacitor; 176, fourth capacitor; 18, third matching circuit; 181, third radio frequency switch; 182, sixth inductor; 183, seventh inductor;

[0067] 2, second low frequency antenna;

[0068] 21, sixth radiator; 211, sixth connection point; 22, sixth matching circuit; 221, tenth capacitor; 222, eleventh capacitor; 223, twelfth capacitor; 224, sixteenth inductor; 225, seventeenth inductor; 226, sixth radio frequency switch; 23, fourth split;

[0069] 3, third low frequency antenna;

[0070] 31, seventh radiator; 311, seventh connection point; 32, seventh matching circuit; 321, eighteenth inductor; 322, nineteenth inductor; 323, thirteenth capacitor; 324, fourteenth capacitor; 325, fifteenth capacitor; 326, sixteenth capacitor; 327, seventh radio frequency switch; 33, fifth split;

[0071] 4, fourth low frequency antenna;

[0072] 41, fourth radiator; 411, fourth connection point; 412, fifth connection point; 42, fifth radiator; 43, third split; 44, fourth matching circuit; 441, fifth capacitor; 442, sixth capacitor; 443, seventh capacitor; 444, eighth inductor; 445, ninth inductor; 446, tenth inductor; 447, eleventh inductor; 448, twelfth inductor; 449, fourth radio frequency switch; 45, fifth matching circuit; 451, fifth radio frequency switch; 452, thirteenth inductor; 453, fourteenth inductor; 454, fifteenth inductor; 455, eighth capacitor; 456, ninth capacitor;

[0073] 5, easily disturbed antenna;

[0074] 6, device middle frame;

[0075] 61, bottom frame body; 62, first side frame body; 63, second side frame body; 64, top frame body. DETAILED DESCRIPTION

[0076] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, unless otherwise indicated, like numbers in the attached drawings refer to the same or similar elements. The following description of exemplary embodiments is not representative of all possible embodiments consistent with this application. Rather, it is merely an example of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0078] It should be understood that in the present application, "electrical connection" can be understood as physical contact and electrical conduction of components; it can also be understood as a form of connection between different components in a circuit structure through a physical circuit such as a copper foil or a wire on a printed circuit board (PCB) that can transmit electrical signals. "Communication connection" can refer to electrical signal transmission, including wireless communication connection and wired communication connection. Wireless communication connection does not require a physical medium and is not a connection relationship that defines the structure of the product.

[0079] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meaning as commonly understood by those of ordinary skill in the art.

[0080] Low frequency (650-1000MHz) is a frequency band essential for electronic devices 2 / 3 / 4 / 5G wireless communication technology, which is very important in mobile communication systems. Due to the natural wide coverage and small propagation loss, low frequency antennas are often used in outdoor, suburban and other scenarios that require large-scale coverage of signals. At the same time, the services carried by the network signals of the low frequency antenna are often voice call services, and the quality of the low frequency antenna is crucial to the user experience. Taking 2 / 3 / 4G as an example, the commonly used frequency bands of low frequency antennas are B28 / B20 / B5 / B8, etc.

[0081] Taking the 700MHz low-frequency band as an example, compared with the 2.6GHz band of 5G, the 700MHz signal has low propagation loss, strong diffraction ability and indoor coverage ability, and can realize deep coverage of ordinary buildings. The 700MHz band signal has a propagation loss of 33.8dB lower than the 5G millimeter wave band signal and a propagation loss of 15.4dB lower than the 2.6GHz band signal. In areas where optical fibers are difficult to reach, the 700MHz band can take advantage of wide coverage and indoor coverage to replace optical fiber access and realize network coverage in remote areas.

[0082] In related technologies, the low-frequency antenna architecture for mobile phones and other electronic devices mainly adopts a three-antenna or four-antenna scheme. However, since the low-frequency antenna band is lower, its size is larger than that of other antennas (the antenna electric length is inversely proportional to the frequency). The space occupied by such multiple low-frequency antennas greatly affects the antenna architecture scheme of the entire electronic device, resulting in serious compression of the space of other antennas, and space conflicts between the low-frequency antenna and other antennas.

[0083] Therefore, the present application provides an antenna system with four low-frequency antennas, which can meet the communication needs of electronic devices for low-frequency bands. The low-frequency antennas make full use of the middle and lower space of the electronic device, occupy less space in the upper part of the electronic device, and can maintain good communication efficiency in a palm holding state, while the upper part of the electronic device reserves enough space for other antennas, thereby not only improving the performance of the low-frequency antennas of the electronic device, but also improving the performance of other antennas of the electronic device, and comprehensively improving the wireless communication performance of the electronic device.

[0084] The present application provides an electronic device. Specifically, the electronic device can be any of various types of computer system devices that are mobile or portable and perform wireless communication. The electronic device adopts one or more of the following communication technologies: Bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, Wireless Fidelity (WiFi) communication technology, Global System for mobile Communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE) communication technology, 5G communication technology, and other future communication technologies.

[0085] In particular, the electronic device can be a mobile telephone or a smart phone (e.g., an iPhone™-based, an Android™-based phone), a portable game device (e.g., a Nintendo DS™, a PlayStation Portable™, a Gameboy Advance™, an iPhone™), a laptop computer, a PDA, a portable Internet device, a music player, and a data storage device, other handheld devices, and the like such as a headset, and the electronic device can also be other wearable devices (e.g., a head-mounted device (HMD) such as an electronic bracelet, an electronic necklace, an electronic device, or a smart watch) that need to be charged.

[0086] The electronic device can also be any one of a plurality of electronic devices including, but not limited to, a cellular phone, a smart phone, other wireless communication devices, a personal digital assistant, an audio player, other media players, a music recorder, a video recorder, other media recorders, a radio, a medical device, a vehicle transportation instrument, a calculator, a programmable remote controller, a pager, a laptop computer, a desktop computer, a printer, a netbook, a personal digital assistant (PDA), a portable multimedia player (PMP), a motion picture experts group (MPEG-1 or MPEGG-2) audio layer 3 (MP3) player, a portable medical device, and a digital camera, and combinations thereof.

[0087] In some cases, the electronic device can perform a plurality of functions (e.g., playing music, displaying a video, storing a picture, and receiving and transmitting a telephone call). If necessary, the electronic device can be a cellular phone, a media player, other handheld devices, a wristwatch device, a pendant device, a handset device, or other compact portable devices.

[0088] For the purpose of making the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0089] In one aspect, in conjunction with Figure 1 As shown in the embodiment, the present embodiment provides an antenna system, which comprises a first low-frequency antenna 1, a second low-frequency antenna 2, a third low-frequency antenna 3, and a fourth low-frequency antenna 4.

[0090] The first low-frequency antenna 1 is located at the bottom 1001 of the electronic device 100; the second low-frequency antenna 2 and the third low-frequency antenna 3 are respectively located at the part of the first side 1002 and the second side 1003 of the electronic device 100 close to the bottom 1001; and the fourth low-frequency antenna 4 is located at the part of the first side 1002 or the second side 1003 close to the top 1004 of the electronic device 100.

[0091] The antenna system of the embodiment has four low-frequency antennas, i.e., the first low-frequency antenna 1, the second low-frequency antenna 2, the third low-frequency antenna 3, and the fourth low-frequency antenna 4, and can meet the communication demand of the electronic device 100 on the low-frequency band. The first low-frequency antenna 1 is arranged at the bottom 1001 of the electronic device 100, and the second low-frequency antenna 2, the third low-frequency antenna 3, and the fourth low-frequency antenna 4 are arranged at two side portions of the electronic device 100, respectively. The middle and lower space of the electronic device 100 is fully utilized, and the upper space of the electronic device 100 is less occupied. The low-frequency antennas radiate by using the eigenmode of the middle frame floor body of the electronic device 100, and the communication efficiency can be maintained in the palm holding state. The upper portion of the electronic device 100 is reserved with sufficient space to arrange other antennas, so as to not only improve the low-frequency antenna performance of the electronic device 100, but also improve the performance of other antennas of the electronic device 100, and comprehensively improve the wireless communication performance of the electronic device 100.

[0092] In some possible implementation manners, at least one of the first low-frequency antenna 1, the second low-frequency antenna 2, the third low-frequency antenna 3, and the fourth low-frequency antenna 4 is a metal frame antenna. Optionally, the metal frame antenna is formed by part of the frame of the middle frame of the electronic device 100.

[0093] Exemplarily, the second low-frequency antenna 2 is located at the part of the first side portion 1002 of the electronic device 100 close to the bottom 1001, and the third low-frequency antenna 3 is located at the part of the second side portion 1003 of the electronic device 100 close to the bottom 1001.

[0094] In combination with FIG. 1, Figure 1 2 As shown in FIG. 1, in some embodiments, the electronic device 100 is provided with a mainboard module 200, and the mainboard module 200 is arranged close to the top 1004 of the electronic device 100. The mainboard module 200 is provided with a radio frequency module 2001. The first low-frequency antenna 1, the second low-frequency antenna 2, the third low-frequency antenna 3, and the fourth low-frequency antenna 4 are electrically connected to the radio frequency module 2001, respectively.

[0095] In the embodiment, the four low-frequency antennas are electrically connected to the radio frequency module 2001 of the mainboard module 200, respectively, so that the radio frequency module 2001 of the mainboard module 200 can be used to process low-frequency signals, and the low-frequency band communication of the electronic device 100 can be realized.

[0096] ​The mainboard module 200 is one of the core components of the electronic device 100, and is a support platform for the main electronic elements inside the electronic device 100, responsible for connecting and controlling the normal operation of each component. Optionally, the mainboard module 200 includes the following parts: a circuit board, which can be a printed circuit board (PCB), a flexible printed circuit board (FPC), a rigid-flex printed circuit board, etc.; a processor (CPU): responsible for performing various computing tasks and controlling the overall operation of the electronic device 100. The performance of the processor directly affects the running speed and response ability of the electronic device 100; memory chips: including random access memory (RAM) and read-only memory (ROM), used to store the operating system, application programs and data of the electronic device 100; a power management chip: responsible for managing battery power supply, charging and power distribution, ensuring effective management of the power of the electronic device 100. Sensors: including accelerometers, gyroscopes, ambient light sensors, etc., used for various sensing functions of the electronic device 100, such as automatic screen rotation, ambient brightness adjustment, etc. Connectors: used for data transmission and communication between various components (such as screens, cameras, speakers, etc.).

[0097] In some possible implementations, the electronic device 100 further comprises a battery module 400, which is arranged close to the bottom 1001 of the electronic device 100. The second low-frequency antenna 2 and the third low-frequency antenna 3 are arranged on the two sides of the battery module 400, respectively.

[0098] In combination with FIGS. 2A and 2B, Figure 1 2 In some embodiments, at least part of the fourth low-frequency antenna 4 overlaps the mainboard module 200 in the horizontal direction, and the fourth low-frequency antenna 4 is electrically connected to the radio frequency module 2001 through a metal spring.

[0099] The top ends of the second low-frequency antenna 2 and the third low-frequency antenna 3 do not overlap the mainboard module 200 in the horizontal direction, and the first low-frequency antenna 1, the second low-frequency antenna 2 and the fourth low-frequency antenna 4 are electrically connected to the radio frequency module 2001 through signal transmission lines, respectively. The first low-frequency antenna 1 and the fourth low-frequency antenna 4 are used for transmitting and receiving radio waves, and the second low-frequency antenna 2 and the third low-frequency antenna 3 are used for receiving radio waves. The horizontal direction is Figure 1 The direction shown in FIG. 2B is the reference, and is not meant to be the direction of the horizontal plane in space. The horizontal direction can also be understood as the width direction of the electronic device 100.

[0100] ​In this embodiment, the fourth low-frequency antenna 4 is close to the mainboard module 200, and can be directly electrically connected to the radio frequency module 2001 in the mainboard module 200 by using the metal spring. The first low-frequency antenna 1, the second low-frequency antenna 2, and the third low-frequency antenna 3 are arranged in the middle and lower part of the electronic device 100, and are far away from the mainboard module 200, and thus are electrically connected to the radio frequency module 2001 in the mainboard module 200 by using the signal transmission line.

[0101] In addition, in order to improve the working performance of the four low-frequency antennas, the fourth low-frequency antenna 4 located at the upper part of the side and the first low-frequency antenna 1 located at the bottom 1001 are designed as bidirectional antennas for transmitting and receiving, and the second low-frequency antenna 2 and the third low-frequency antenna 3 located at the middle and lower parts of the two sides are designed as receiving antennas. This is because the bottom 1001 and the upper part of the side of the electronic device 100 are positions with relatively high clearance environment, and the low-frequency antennas at these positions are designed as bidirectional antennas, which can maximize the anti-interference ability of the low-frequency antennas and improve the low-frequency performance of the antenna system. The second low-frequency antenna 2 and the third low-frequency antenna 3 are located at positions far away from the mainboard module 200, and the clearance environment is generally low, and thus the second low-frequency antenna 2 and the third low-frequency antenna 3 are designed as receiving antennas, which can save a large number of active devices, and reduce the design difficulty and production cost of the radio frequency module 2001.

[0102] In some possible implementations, the signal transmission line includes but is not limited to a coaxial line, an FPC line, an MPI (Multipoint Interface) line, an LCP (Liquid Crystal Polyester) line, and the like. Exemplarily, when the electronic device 100 is a foldable electronic device 100, the signal transmission line adopts a flexible transmission line such as an FPC line or an LCP line.

[0103] In combination with Figure 3 As shown in FIG. 1, in some embodiments, the radio frequency module 2001 includes a radio frequency chip 2002, a first radio frequency switch 2003, and a radio frequency front-end component 2004, the first low-frequency antenna 1 and the fourth low-frequency antenna 4 are electrically connected to the first radio frequency switch 2003 respectively, the first radio frequency switch 2003 is electrically connected to the radio frequency front-end component 2004, the radio frequency front-end component 2004 is electrically connected to the radio frequency chip 2002, and the first radio frequency switch 2003 is used to switch the receiving state and the transmitting state of the first low-frequency antenna 1 and the fourth low-frequency antenna 4.

[0104] The first radio frequency switch 2003 can be used to switch the working states of the first low-frequency antenna 1 and the fourth low-frequency antenna 4, and meet the working requirements of the first low-frequency antenna 1 and the second low-frequency antenna 2.

[0105] In combination with Figure 1 , 3As shown, in some embodiments, the electronic device 100 is also provided with a secondary board module 300, which is arranged close to the bottom 1001 of the electronic device 100. The secondary board module 300 is provided with a signal optimization module 3001, one end of the signal optimization module 3001 is electrically connected to the radio frequency module 2001 through a signal transmission line, and the other end of the signal optimization module 3001 is electrically connected to at least one of the second low-frequency antenna 2 and the third low-frequency antenna 3.

[0106] The secondary board module 300 is an important component inside the electronic device 100, which can also be called a sub-board or a secondary board. The secondary board module 300 is arranged at the bottom 1001 of the electronic device 100 and is responsible for connecting and supporting the functional modules or components in the area of the bottom 1001 of the electronic device 100. The bottom ends of the second low-frequency antenna 2 and the third low-frequency antenna 3 are closer to the secondary board module 300 and farther from the main board module 200. In order to solve the problem that the overall performance of the second low-frequency antenna 2 and the third low-frequency antenna 3 is poor due to excessive loss caused by signal transmission through a long signal transmission line, a signal optimization module 3001 is designed in the secondary board module 300 close to the two low-frequency antennas. The signal optimization module 3001 optimizes the input signal of the low-frequency antenna at the front end, and then transmits the signal back to the radio frequency module 2001 in the main board module 200 through the signal transmission line. This can optimize the radio frequency transmission sensitivity of the second low-frequency antenna 2 and the third low-frequency antenna 3, thereby effectively improving the active performance of the two low-frequency antennas and ultimately bringing benefits to the entire four low-frequency antennas.

[0107] In some possible implementations, the secondary board module 300 also includes the following functions: extended function support: providing additional interfaces or connectors to support extended function modules, such as external storage, extended camera, etc. Auxiliary function support: integrating some auxiliary function modules, such as audio amplifiers, vibration motors, etc., to enhance the audio output effect or vibration feedback function of the mobile phone. Power management support: some power management chips or modules can be integrated to manage the power supply and power consumption of specific function modules to improve the energy efficiency and endurance performance of the mobile phone.

[0108] In combination Figure 3 As shown, in some embodiments, the signal optimization module 3001 includes a first low-noise amplifier 3002 and a second low-noise amplifier 3003; the first low-noise amplifier 3002 is electrically connected between the radio frequency module 2001 and the second low-frequency antenna 2, and the second low-noise amplifier 3003 is electrically connected between the radio frequency module 2001 and the third low-frequency antenna 3.

[0109] By arranging the first low-noise amplifier 3002 between the second low-frequency antenna 2 and the radio frequency module 2001, and arranging the second low-noise amplifier 3003 between the third low-frequency antenna 3 and the radio frequency module 2001, the active performance of the two low-frequency antennas can be effectively improved, and ultimately the benefits of the entire four low-frequency antennas can be brought.

[0110] The benefits of the antenna system of the embodiment in the N28 frequency band are shown in Table 1.

[0111] Table 1

[0112] Test item The present embodiment Related art N28 band radio frequency sensitivity About -96dBm About -93dBm

[0113] In combination Figure 4 As shown in the drawings, in some embodiments, the first low-frequency antenna 1 includes a first radiator 11 located in the middle of the bottom 1001, and a second radiator 12 and / or a third radiator 13 located at both ends of the bottom 1001, the second radiator 12 being arranged apart from one end of the first radiator 11 by a first break 14, and the third radiator 13 being arranged apart from the other end of the first radiator 11 by a second break 15; the ends of the second radiator 12 and the third radiator 13 away from the first radiator 11 are respectively grounded.

[0114] Through the above arrangement, the first low-frequency antenna 1 can make full use of the space of the bottom 1001 of the electronic device 100 to meet the communication needs of the low-frequency frequency band.

[0115] In combination Figure 5 As shown in the drawings, in some embodiments, the first radiator 11 is provided with a first connection point 111 and a second connection point 112, and the third radiator 13 includes a third connection point 131; the first connection point 111 is located at a position of the first radiator 11 close to the second break 15, the second connection point 112 is located between the first connection point 111 and the first break 14, and the third connection point 131 is located at a position of the third radiator 13 close to the second break 15.

[0116] The first low-frequency antenna 1 further includes a first matching circuit 16, a second matching circuit 17, and a third matching circuit 18, the first matching circuit 16 being electrically connected to the first connection point 111, the second matching circuit 17 being electrically connected to the second connection point 112, and the third matching circuit 18 being electrically connected to the third connection point 131.

[0117] Through the above arrangement, the first low-frequency antenna 1 can realize coverage of the low-frequency frequency band, and can realize switching of different low-frequency frequency bands by using the three matching circuits.

[0118] In combination Figure 5As shown in the figure, in some embodiments, the first matching circuit 16 includes a first inductor 161, a second inductor 162, a first capacitor 163 and a second capacitor 164; one end of the first inductor 161 is electrically connected to the radio frequency module 2001, the other end of the first inductor 161 is electrically connected to one end of the first capacitor 163 and one end of the second capacitor 164 respectively, the other end of the first capacitor 163 is grounded, and the other end of the second capacitor 164 is electrically connected to the first connection point 111 and one end of the second inductor 162 respectively, and the other end of the second inductor 162 is grounded.

[0119] The second matching circuit 17 includes a second radio frequency switch 171, a third inductor 172, a fourth inductor 173, a fifth inductor 174, a third capacitor 175 and a fourth capacitor 176; the input end of the second radio frequency switch 171 and one end of the third inductor 172 are electrically connected to the second connection point 112 at the same time, the output end of the second radio frequency switch 171 is grounded through the fourth inductor 173, the fifth inductor 174, the third capacitor 175 and the fourth capacitor 176 respectively, and the other end of the third inductor 172 is grounded.

[0120] The third matching circuit 18 includes a third radio frequency switch 181, a sixth inductor 182 and a seventh inductor 183; one end of the third radio frequency switch 181 and one end of the sixth inductor 182 are electrically connected to the third connection point 131 at the same time, the other end of the sixth inductor 182 is grounded, and the other end of the third radio frequency switch 181 is grounded through the seventh inductor 183.

[0121] Through the above arrangement, the first low-frequency antenna 1 can meet the low-frequency communication needs of the electronic device 100.

[0122] Figure 9 And Figure 10 are the test results of S11 and efficiency of the first low-frequency antenna 1 of the embodiment, from Figure 9 It can be seen that the first low-frequency antenna 1 has good S11 values in the B5, B8, B28 and N71 frequency bands in the sending and receiving states, from Figure 10 It can be seen that the first low-frequency antenna 1 has good radiation efficiency and total efficiency in the B5, B8, B28 and N71 frequency bands in the sending and receiving states, and can meet the coverage of the low-frequency frequency band.

[0123] In combination with Figure 4 As shown in the figure, in some embodiments, the fourth low-frequency antenna 4 includes a fourth radiator 41 close to the top 1004, and a fifth radiator 42 located at the bottom end of the fourth radiator 41, the fifth radiator 42 and the bottom end of the fourth radiator 41 are arranged at intervals through a third break 43, the top end of the fourth radiator 41 is grounded, and the bottom end of the fifth radiator 42 is grounded.

[0124] Through the above arrangement, the fourth low-frequency antenna 4 can make full use of the side space of the electronic device 100 and meet the communication demand of the low-frequency frequency band.

[0125] In combination Figure 6 As shown in FIG. 4, in some embodiments, the fourth radiator 41 is provided with a fourth connection point 411 and a fifth connection point 412, the fourth connection point 411 is close to the top end of the fourth radiator 41, and the fifth connection point 412 is close to the bottom end of the fifth radiator 42.

[0126] The fourth low-frequency antenna 4 further includes a fourth matching circuit 44 and a fifth matching circuit 45, the fourth matching circuit 44 is electrically connected to the fourth connection point 411, and the fifth matching circuit 45 is electrically connected to the fifth connection point 412.

[0127] Through the above arrangement, the fourth low-frequency antenna 4 can realize the coverage of the low-frequency frequency band and realize the switching of different low-frequency frequency bands by using two matching circuits.

[0128] In combination Figure 6 As shown in FIG. 4, in some embodiments, the fourth matching circuit 44 includes a fifth capacitor 441, a sixth capacitor 442, a seventh capacitor 443, an eighth inductor 444, a ninth inductor 445, a tenth inductor 446, an eleventh inductor 447, a twelfth inductor 448, and a fourth radio frequency switch 449; one end of the fifth capacitor 441 and one end of the eighth inductor 444 are electrically connected to the radio frequency module 2001 at the same time, the other end of the fifth capacitor 441 is grounded, the other end of the eighth inductor 444 is electrically connected to one end of the sixth capacitor 442 and one end of the seventh capacitor 443 respectively, the other end of the sixth capacitor 442 is electrically connected to an input end of the fourth radio frequency switch 449, one end of the twelfth inductor 448, and the fourth connection point 411 respectively, the other end of the seventh capacitor 443 is electrically connected to one output end of the fourth radio frequency switch 449, the remaining output ends of the fourth radio frequency switch 449 are grounded through the ninth inductor 445, the tenth inductor 446, and the eleventh inductor 447 respectively, and the other end of the twelfth inductor 448 is grounded.

[0129] The fifth matching circuit 45 includes a fifth radio frequency switch 451, a thirteenth inductor 452, a fourteenth inductor 453, a fifteenth inductor 454, an eighth capacitor 455, and a ninth capacitor 456; the input end of the fifth radio frequency switch 451 is electrically connected to one end of the thirteenth inductor 452 and the fifth connection point 412 respectively, the output end of the fifth radio frequency switch 451 is grounded through the eighth capacitor 455, the ninth capacitor 456, the fourteenth inductor 453, and the fifteenth inductor 454 respectively, and the other end of the thirteenth inductor 452 is grounded.

[0130] Through the above arrangement, the fourth low-frequency antenna 4 can meet the low-frequency communication demand of the electronic device 100.

[0131] Figure 11 and Figure 12 are test results of S11 and efficiency of the fourth low-frequency antenna 4 of this embodiment, from Figure 11 It can be seen that the fourth low-frequency antenna 4 has good S11 values in the B5, B8, B28 low-frequency and B28 mid-high-frequency frequency bands in the sending and receiving states, from Figure 12 It can be seen that the fourth low-frequency antenna 4 has good radiation efficiency and total efficiency in the B5, B8, B28 low-frequency and B28 mid-high-frequency frequency bands in the sending and receiving states, and can meet the coverage of the low-frequency frequency band.

[0132] In combination with Figure 4 , 7 It is shown that in some embodiments, the second low-frequency antenna 2 includes a sixth radiator 21 and a sixth matching circuit 22; the top end of the sixth radiator 21 is provided with a fourth break 23, and the bottom end of the sixth radiator 21 is grounded; the sixth radiator 21 is provided with a sixth connection point 211.

[0133] The sixth matching circuit 22 includes a tenth capacitor 221, an eleventh capacitor 222, a twelfth capacitor 223, a sixteenth inductor 224, a seventeenth inductor 225 and a sixth radio frequency switch 226; one end of the tenth capacitor 221 and one end of the eleventh capacitor 222 are electrically connected to the sixth connection point 211 at the same time, the other end of the tenth capacitor 221 is electrically connected to one input end of the sixth radio frequency switch 226, the other input end of the sixth radio frequency switch 226 is electrically connected to the radio frequency module 2001, the other end of the eleventh capacitor 222 is electrically connected to one output end of the sixth radio frequency switch 226, and the other three output ends of the sixth radio frequency switch 226 are grounded through the sixteenth inductor 224, the twelfth capacitor 223 and the seventeenth inductor 225 respectively.

[0134] Through the above arrangement, the second low-frequency antenna 2 can meet the low-frequency communication needs of the electronic equipment 100.

[0135] Figure 13 and Figure 14 are test results of S11 and efficiency of the second low-frequency antenna 2 of this embodiment, from Figure 13 It can be seen that the second low-frequency antenna 2 has good S11 values in the B5, B8, B28 and N71 frequency bands in the receiving state, from Figure 10 It can be seen that the second low-frequency antenna 2 has good radiation efficiency and total efficiency in the B5, B8, B28 and N71 frequency bands in the sending and receiving states, and can meet the coverage of the low-frequency frequency band.

[0136] In combination with Figure 4 , 8As shown in FIG. 1, in some embodiments, the third low-frequency antenna 3 includes a seventh radiator 31 and a seventh matching circuit 32; the seventh radiator 31 is provided with a fifth break 33 at the top end, and the bottom end of the seventh radiator 31 is grounded; and the seventh radiator 31 is provided with a seventh connection point 311.

[0137] The seventh matching circuit 32 includes an eighteenth inductor 321, a nineteenth inductor 322, a thirteenth capacitor 323, a fourteenth capacitor 324, a fifteenth capacitor 325, a sixteenth capacitor 326, and a seventh radio frequency switch 327; one end of the eighteenth inductor 321 and an input end of the seventh radio frequency switch 327 are electrically connected to the seventh connection point 311 at the same time, the other end of the eighteenth inductor 321 is electrically connected to the radio frequency module 2001, one end of the nineteenth inductor 322, one end of the thirteenth capacitor 323, and one end of the fourteenth capacitor 324 respectively, the other end of the nineteenth inductor 322 is grounded, the other end of the thirteenth capacitor 323 and the other end of the fourteenth capacitor 324 are electrically connected to two output ends of the seventh radio frequency switch 327 respectively, and the other two output ends of the seventh radio frequency switch 327 are grounded through the fifteenth capacitor 325 and the sixteenth capacitor 326 respectively.

[0138] Through the above arrangement, the third low-frequency antenna 3 can meet the low-frequency communication needs of the electronic device 100.

[0139] Figure 15 And Figure 16 are the test results of S11 and efficiency of the third low-frequency antenna 3 of the present embodiment, from Figure 13 It can be seen that the third low-frequency antenna 3 has good S11 values in the receiving states of the B5, B8, and B28 frequency bands, from Figure 10 It can be seen that the third low-frequency antenna 3 has good radiation efficiency and total efficiency in the transmitting and receiving states of the B5, B8, and B28 frequency bands, and can meet the coverage of the low-frequency frequency band.

[0140] In combination with Figure 4 As shown in FIG. 1, in some embodiments, the antenna system further includes at least one interference-prone antenna 5, which is located at the top 1004 of the electronic device 100, and / or at a part of the first side 1002 or the second side 1003 close to the top 1004 of the electronic device 100; the at least one interference-prone antenna 5 includes one or more of the following: a GPS antenna, a Wi-Fi antenna, a Bluetooth antenna, a 4G MHB antenna, a 5G MHB antenna, and an N78 antenna.

[0141] In the embodiment, the four low-frequency antennas with large size and occupying more space are arranged at the middle and lower part of the electronic device 100, the space of the top part 1004 of the electronic device 100 is reserved, the clearance environment of the top part 1004 is best, the antennas 5 susceptible to interference are arranged at the top part 1004 of the electronic device 100, the antennas can be avoided from being interfered, and the communication performance is better, so that the communication performance of the antenna system in the electronic device 100 can be improved from the overall perspective.

[0142] In some embodiments, the electronic device further includes a device middle frame 6. The device middle frame 6 includes a bottom frame body 61, a first side frame body 62, a second side frame body 63, and a top frame body 64. The bottom frame body 61 is located at the bottom part 1001 of the electronic device 100, and at least part of the bottom frame body 61 forms the first low-frequency antenna 1. The first side frame body 62 is located at the first side part 1002 of the electronic device 100, and at least part of the first side frame body 62 forms the second low-frequency antenna 2. The second side frame body 63 is located at the second side part 1003 of the electronic device 100, and at least part of the second side frame body 63 forms the third low-frequency antenna 3. At least part of the first side frame body 62 or the second side frame body 63 further forms the fourth low-frequency antenna 4. The top frame body 64 is located at the top part 1004 of the electronic device 100. Figure 9 In some embodiments, the electronic device further includes a device middle frame 6. The device middle frame 6 includes a bottom frame body 61, a first side frame body 62, a second side frame body 63, and a top frame body 64. The bottom frame body 61 is located at the bottom part 1001 of the electronic device 100, and at least part of the bottom frame body 61 forms the first low-frequency antenna 1. The first side frame body 62 is located at the first side part 1002 of the electronic device 100, and at least part of the first side frame body 62 forms the second low-frequency antenna 2. The second side frame body 63 is located at the second side part 1003 of the electronic device 100, and at least part of the second side frame body 63 forms the third low-frequency antenna 3. At least part of the first side frame body 62 or the second side frame body 63 further forms the fourth low-frequency antenna 4. The top frame body 64 is located at the top part 1004 of the electronic device 100.

[0143] Figure 9 In some embodiments, the electronic device further includes a device middle frame 6. The device middle frame 6 includes a bottom frame body 61, a first side frame body 62, a second side frame body 63, and a top frame body 64. The bottom frame body 61 is located at the bottom part 1001 of the electronic device 100, and at least part of the bottom frame body 61 forms the first low-frequency antenna 1. The first side frame body 62 is located at the first side part 1002 of the electronic device 100, and at least part of the first side frame body 62 forms the second low-frequency antenna 2. The second side frame body 63 is located at the second side part 1003 of the electronic device 100, and at least part of the second side frame body 63 forms the third low-frequency antenna 3. At least part of the first side frame body 62 or the second side frame body 63 further forms the fourth low-frequency antenna 4. The top frame body 64 is located at the top part 1004 of the electronic device 100.

[0144] In some embodiments, the electronic device further includes a device middle frame 6. The device middle frame 6 includes a bottom frame body 61, a first side frame body 62, a second side frame body 63, and a top frame body 64. The bottom frame body 61 is located at the bottom part 1001 of the electronic device 100, and at least part of the bottom frame body 61 forms the first low-frequency antenna 1. The first side frame body 62 is located at the first side part 1002 of the electronic device 100, and at least part of the first side frame body 62 forms the second low-frequency antenna 2. The second side frame body 63 is located at the second side part 1003 of the electronic device 100, and at least part of the second side frame body 63 forms the third low-frequency antenna 3. At least part of the first side frame body 62 or the second side frame body 63 further forms the fourth low-frequency antenna 4. The top frame body 64 is located at the top part 1004 of the electronic device 100.

[0145] In some possible implementation manners, the electronic device can further include a memory, an input unit, a display unit, a sensor, an audio circuit, a Wi-Fi module, a processor having one or more processing cores, a power supply, and the like.

[0146] It should be noted that the terms "first", "second" and the like are used only for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0147] ​In the description of the present specification, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application.

[0148] The above only describes the embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna system, characterized by The antenna system comprises a first low-frequency antenna (1), a second low-frequency antenna (2), a third low-frequency antenna (3) and a fourth low-frequency antenna (4); The first low-frequency antenna (1) is located at the bottom (1001) of the electronic device (100); the second low-frequency antenna (2) and the third low-frequency antenna (3) are respectively located at the part area of the first side (1002) and the second side (1003) of the electronic device (100) close to the bottom (1001); and the fourth low-frequency antenna (4) is located at the part area of the first side (1002) or the second side (1003) close to the top (1004) of the electronic device (100).

2. The antenna system of claim 1, wherein, The mainboard module (200) is arranged close to the top (1004) of the electronic device (100); The mainboard module (200) is arranged close to the top (1004) of the electronic device (100); The first low-frequency antenna (1), the second low-frequency antenna (2), the third low-frequency antenna (3) and the fourth low-frequency antenna (4) are respectively electrically connected with the radio frequency module (2001).

3. The antenna system of claim 2, wherein, At least part of the fourth low-frequency antenna (4) overlaps the mainboard module (200) in the horizontal direction, and the fourth low-frequency antenna (4) is electrically connected with the radio frequency module (2001) through a metal spring; The top ends of the second low-frequency antenna (2) and the third low-frequency antenna (3) do not overlap the mainboard module (200) in the horizontal direction, and the first low-frequency antenna (1), the second low-frequency antenna (2) and the fourth low-frequency antenna (4) are respectively electrically connected with the radio frequency module (2001) through signal transmission lines; The first low-frequency antenna (1) and the fourth low-frequency antenna (4) are used for transmitting and receiving radio waves, and the second low-frequency antenna (2) and the third low-frequency antenna (3) are used for receiving radio waves.

4. The antenna system of claim 3, wherein, The radio frequency module (2001) comprises a radio frequency chip (2002), a first radio frequency switch (2003) and a radio frequency front-end component (2004); The first low-frequency antenna (1) and the fourth low-frequency antenna (4) are respectively electrically connected to the first radio frequency switch (2003), the first radio frequency switch (2003) is electrically connected to the radio frequency front-end component (2004), the radio frequency front-end component (2004) is electrically connected to the radio frequency chip (2002), and the first radio frequency switch (2003) is used for switching the receiving state and the transmitting state of the first low-frequency antenna (1) and the fourth low-frequency antenna (4).

5. The antenna system of any one of claims 2 to 4, wherein, The electronic device (100) further comprises a subboard module (300), and the subboard module (300) is arranged close to the bottom (1001) of the electronic device (100); The sub-board module (300) is provided with a signal optimization module (3001), one end of the signal optimization module (3001) is electrically connected to the radio frequency module (2001) through a signal transmission line, and the other end of the signal optimization module (3001) is electrically connected to at least one of the second low-frequency antenna (2) and the third low-frequency antenna (3).

6. The antenna system of claim 5, wherein, The signal optimization module (3001) comprises a first low-noise amplifier (3002) and a second low-noise amplifier (3003); the first low-noise amplifier (3002) is electrically connected between the radio frequency module (2001) and the second low-frequency antenna (2), and the second low-noise amplifier (3003) is electrically connected between the radio frequency module (2001) and the third low-frequency antenna (3).

7. The antenna system of claim 3 or 4, wherein, The first low-frequency antenna (1) comprises a first radiator (11) located in the middle of the bottom (1001), and a second radiator (12) and / or a third radiator (13) located at both ends of the bottom (1001), the second radiator (12) and the first radiator (11) are arranged at intervals through a first break (14), and the third radiator (13) and the first radiator (11) are arranged at intervals through a second break (15); the end of the second radiator (12) and the third radiator (13) away from the first radiator (11) is grounded.

8. The antenna system of claim 7, wherein, The first radiator (11) is provided with a first connecting point (111) and a second connecting point (112), and the third radiator (13) comprises a third connecting point (131); the first connecting point (111) is located at a position close to the second break (15) of the first radiator (11), the second connecting point (112) is located between the first connecting point (111) and the first break (14), and the third connecting point (131) is located at a position close to the second break (15) of the third radiator (13). The first low-frequency antenna (1) further comprises a first matching circuit (16), a second matching circuit (17) and a third matching circuit (18), the first matching circuit (16) is electrically connected to the first connecting point (111), the second matching circuit (17) is electrically connected to the second connecting point (112), and the third matching circuit (18) is electrically connected to the third connecting point (131).

9. The antenna system of claim 8, wherein, The first matching circuit (16) comprises a first inductor (161), a second inductor (162), a first capacitor (163) and a second capacitor (164); one end of the first inductor (161) is electrically connected to the radio frequency module (2001), the other end of the first inductor (161) is electrically connected to one end of the first capacitor (163) and one end of the second capacitor (164) respectively, the other end of the first capacitor (163) is grounded, and the other end of the second capacitor (164) is electrically connected to the first connecting point (111) and one end of the second inductor (162) respectively, and the other end of the second inductor (162) is grounded. The second matching circuit (17) comprises a second radio frequency switch (171), a third inductor (172), a fourth inductor (173), a fifth inductor (174), a third capacitor (175) and a fourth capacitor (176); the input end of the second radio frequency switch (171) and one end of the third inductor (172) are electrically connected to the second connecting point (112) at the same time, the output end of the second radio frequency switch (171) is grounded through the fourth inductor (173), the fifth inductor (174), the third capacitor (175) and the fourth capacitor (176) respectively, and the other end of the third inductor (172) is grounded. The third matching circuit (18) comprises a third radio frequency switch (181), a sixth inductor (182) and a seventh inductor (183); one end of the third radio frequency switch (181) and one end of the sixth inductor (182) are electrically connected to the third connecting point (131) at the same time, the other end of the sixth inductor (182) is grounded, and the other end of the third radio frequency switch (181) is grounded through the seventh inductor (183).

10. The antenna system of claim 4, wherein, The fourth low-frequency antenna (4) comprises a fourth radiator (41) close to the top (1004) and a fifth radiator (42) located at the bottom end of the fourth radiator (41), and the fifth radiator (42) and the bottom end of the fourth radiator (41) are arranged at intervals through a third break (43), the top end of the fourth radiator (41) is grounded, and the bottom end of the fifth radiator (42) is grounded.

11. The antenna system of claim 10, wherein, The fourth radiator (41) is provided with a fourth connecting point (411) and a fifth connecting point (412), the fourth connecting point (411) is close to the top end of the fourth radiator (41), and the fifth connecting point (412) is close to the bottom end of the fifth radiator (42); The fourth low-frequency antenna (4) further comprises a fourth matching circuit (44) and a fifth matching circuit (45), the fourth matching circuit (44) is electrically connected to the fourth connecting point (411), and the fifth matching circuit (45) is electrically connected to the fifth connecting point (412).

12. The antenna system of claim 11, wherein, One end of the fifth capacitor (441) and one end of the eighth inductor (444) are electrically connected with the radio frequency module (2001), the other end of the fifth capacitor (441) is grounded, the other end of the eighth inductor (444) is electrically connected with one end of the sixth capacitor (442) and one end of the seventh capacitor (443) respectively, the other end of the sixth capacitor (442) is electrically connected with the input end of the fourth radio frequency switch (449), one end of the twelfth inductor (448) and the fourth connecting point (411) respectively, the other end of the seventh capacitor (443) is electrically connected with one output end of the fourth radio frequency switch (449), the remaining output ends of the fourth radio frequency switch (449) are grounded through the ninth inductor (445), the tenth inductor (446) and the eleventh inductor (447) respectively, the other end of the twelfth inductor (448) is grounded; The fifth matching circuit (45) comprises a fifth radio frequency switch (451), a thirteenth inductor (452), a fourteenth inductor (453), a fifteenth inductor (454), an eighth capacitor (455) and a ninth capacitor (456); the input end of the fifth radio frequency switch (451) is electrically connected with one end of the thirteenth inductor (452) and the fifth connecting point (412) respectively, the output end of the fifth radio frequency switch (451) is grounded through the eighth capacitor (455), the ninth capacitor (456), the fourteenth inductor (453) and the fifteenth inductor (454) respectively, the other end of the thirteenth inductor (452) is grounded.

13. The antenna system of any one of claims 3 to 12, wherein, The second low-frequency antenna (2) comprises a sixth radiator (21) and a sixth matching circuit (22); The top end of the sixth radiator (21) is provided with a fourth break (23), and the bottom end of the sixth radiator (21) is grounded; the sixth radiator (21) is provided with a sixth connecting point (211); The top end of the sixth radiator (21) is provided with a fourth break (23), and the bottom end of the sixth radiator (21) is grounded; the sixth radiator (21) is provided with a sixth connecting point (211); The sixth matching circuit (22) comprises a tenth capacitor (221), an eleventh capacitor (222), a twelfth capacitor (223), a sixteenth inductor (224), a seventeenth inductor (225) and a sixth radio frequency switch (226); one end of the tenth capacitor (221) and one end of the eleventh capacitor (222) are electrically connected to the sixth connection point (211) at the same time, the other end of the tenth capacitor (221) is electrically connected to one input end of the sixth radio frequency switch (226), the other input end of the sixth radio frequency switch (226) is electrically connected to the radio frequency module (2001), the other end of the eleventh capacitor (222) is electrically connected to one output end of the sixth radio frequency switch (226), and the other three output ends of the sixth radio frequency switch (226) are grounded through the sixteenth inductor (224), the twelfth capacitor (223) and the seventeenth inductor (225) respectively.

14. The antenna system of any one of claims 3 to 12, wherein, The third low-frequency antenna (3) comprises a seventh radiator (31) and a seventh matching circuit (32). The top end of the seventh radiator (31) is provided with a fifth break (33), and the bottom end of the seventh radiator (31) is grounded; the seventh radiator (31) is provided with a seventh connection point (311); The seventh matching circuit (32) comprises an eighteenth inductor (321), a nineteenth inductor (322), a thirteenth capacitor (323), a fourteenth capacitor (324), a fifteenth capacitor (325), a sixteenth capacitor (326) and a seventh radio frequency switch (327); one end of the eighteenth inductor (321) and the input end of the seventh radio frequency switch (327) are electrically connected to the seventh connection point (311) at the same time, the other end of the eighteenth inductor (321) is electrically connected to the radio frequency module (2001), one end of the nineteenth inductor (322), one end of the thirteenth capacitor (323) and one end of the fourteenth capacitor (324) respectively, the other end of the nineteenth inductor (322) is grounded, the other end of the thirteenth capacitor (323) and the other end of the fourteenth capacitor (324) are electrically connected to two output ends of the seventh radio frequency switch (327) respectively, and the other two output ends of the seventh radio frequency switch (327) are grounded through the fifteenth capacitor (325) and the sixteenth capacitor (326) respectively.

15. The antenna system of any one of claims 1 to 14, wherein, The antenna system further comprises at least one easily disturbed antenna (5) located on the top (1004) of the electronic device (100), and / or on the part of the first side (1002) or the second side (1003) close to the top (1004) of the electronic device (100). The at least one easily disturbed antenna (5) comprises one or more of the following: a GPS antenna, a Wi-Fi antenna, a Bluetooth antenna, a 4G MHB antenna, a 5G MHB antenna and an N78 antenna.

16. An electronic device, comprising: The electronic device (100) comprises the antenna system of any one of claims 1 to 15. The electronic device (100) comprises the antenna system of any one of claims 1 to 15.

17. The electronic device of claim 16, wherein, The electronic device further includes a device middle frame (6); The device middle frame (6) includes a bottom frame body (61), a first side frame body (62), a second side frame body (63) and a top frame body (64), the bottom frame body (61) is located at the bottom (1001) of the electronic device (100), at least part of the bottom frame body (61) forms the first low-frequency antenna (1), the first side frame body (62) is located at the first side (1002) of the electronic device (100), at least part of the first side frame body (62) forms the second low-frequency antenna (2), the second side frame body (63) is located at the second side (1003) of the electronic device (100), at least part of the second side frame body (63) forms the third low-frequency antenna (3), at least part of the first side frame body (62) or the second side frame body (63) further forms the fourth low-frequency antenna (4), and the top frame body (64) is located at the top (1004) of the electronic device (100).

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