Multiple-input multiple-output antenna system and mobile terminal

Abstract

The present invention discloses a multi-input multi-output antenna system, which is applied to a mobile terminal. The multi-input multi-output antenna system includes a metal frame, which is provided with a plurality of slots. The metal frames on both sides of each slot are provided with overlapping points. The metal frame, each slot and the corresponding overlapping points constitute an antenna. The upper and lower metal frames of each slot are coupled to generate two resonant frequencies; a metal bottom shell is provided in the metal frame, and the metal bottom shell is provided with a clearance area; a plurality of adjustment units are provided on the metal bottom shell, corresponding to the plurality of slots one by one, and each adjustment unit is connected to the antenna through the overlapping points to adjust the two resonant frequencies. The embodiment of the present invention also discloses a mobile terminal. Through the technical solution of the embodiment of the present invention, multiple frequency bands can be concentrated on one antenna unit, effectively utilizing the mobile phone space and solving the problem of insufficient mobile phone space.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and more specifically, to a multiple-input multiple-output antenna system and a mobile terminal. Background Art

[0002] With the continuous development of wireless communication technology, mobile users have an increasingly strong demand for faster data transmission and better mobile devices. 5G came into being. 5G communication has the characteristics of high speed, large capacity, and low latency. Multiple Input Multiple Output (MIMO) technology has become one of the key technologies for realizing 5G communication. Due to the wide bandwidth of 5G antennas, 2500M-2700M, 3300M-4200M, and 4400M-4900M. It is difficult for existing technologies to cover the entire frequency band range of 2500M-4900M on one antenna, and it needs to be split into multiple antennas to achieve multi-band coverage. This requires more antennas, which is not conducive to the design of mobile phone antennas, and is even more difficult to implement on full-screen smartphones. Summary of the invention

[0003] The main purpose of the present invention is to propose a multi-input multi-output antenna system and a mobile terminal, aiming to concentrate multiple frequency bands on one antenna unit, effectively utilize the mobile phone space, and solve the problem of insufficient mobile phone space.

[0004] To achieve the above object, the present invention provides a multiple-input multiple-output antenna system, which is applied to a mobile terminal. The multiple-input multiple-output antenna system includes:

[0005] A metal frame is provided with a plurality of slots, and overlapping points are provided on the metal frames on both sides of each slot, the metal frame, each slot and the corresponding overlapping points form an antenna, and the upper and lower metal frames of each slot are coupled to generate two resonant frequencies;

[0006] A metal bottom shell is arranged in the metal frame, and the metal bottom shell is provided with a clearance area;

[0007] A plurality of adjustment units are arranged on the metal bottom shell and correspond to the plurality of gaps one by one. Each adjustment unit is connected to the antenna through a bridging point and is used to adjust the two resonant frequencies.

[0008] Preferably, a clearance area is correspondingly arranged for each antenna, and the clearance area is arranged on one side of the antenna and half contained in the antenna.

[0009] Preferably, the width of the plurality of gaps ranges from 1 to 2 mm.

[0010] Preferably, the overlapping points include:

[0011] The first overlap point is arranged above the gap and is 5 mm away from the gap;

[0012] The feed point overlap point is arranged below the gap and is 5 mm away from the gap;

[0013] The second overlap point is arranged below the feed point overlap point and is 10 mm away from the gap.

[0014] Preferably, the upper side of the clearance area is located above the first overlapping point, the lower side of the clearance area is located below the second overlapping point, and the side of the clearance area is located on the left side of the overlapping point, so that the clearance area half contains the antenna.

[0015] Preferably, the adjustment unit comprises:

[0016] A feed point connected to the feed point landing point;

[0017] A first electronic switch, comprising a control end, a first end and a second end, wherein the first end is electrically connected to the first junction point via a first capacitor, and the second end is electrically connected to the first junction point via a first inductor;

[0018] A second electronic switch comprises a control end, a first end and a second end, wherein the first end is electrically connected to the second junction point via a second capacitor, and the second end is electrically connected to the second junction point via a second inductor;

[0019] A control unit is electrically connected to the control unit of the first electronic switch and the second end of the second electronic switch.

[0020] Preferably, the control unit controls the first electronic switch to be connected to the first capacitor, and controls the second electronic switch to be connected to the second capacitor, so that the two resonant frequencies cover 2500M-2700MHz and 4400M-4900MHz;

[0021] When the control unit controls the first electronic switch to switch to the first inductor, a resonant frequency of 3300M-3800MHz can be generated;

[0022] When the control unit controls the second electronic switch to switch to the second inductor, a resonant frequency of 3300M-4200MHz can be generated.

[0023] Preferably, the adjustment unit comprises:

[0024] A third capacitor, one end of which is electrically connected to the first connecting point and the other end of which is grounded, and is used to adjust the resonant frequency;

[0025] a fourth capacitor, one end of which is electrically connected to the second connecting point and the other end of which is grounded, and is used to adjust the resonant frequency;

[0026] A feed point is electrically connected to the feed point bonding point.

[0027] Preferably, the number of the plurality of slots and the plurality of adjustment units is 4, each adjustment unit, each slot and the corresponding overlap point constitute an antenna unit, and the configuration and performance of each antenna unit are the same.

[0028] In addition, to achieve the above object, the present invention also provides a mobile terminal, comprising the above multi-input multi-output system.

[0029] The multi-input multi-output antenna system and mobile terminal proposed in the present invention have a gap that divides the metal frame into two upper and lower metal parts. The upper and lower metal parts generate two resonant frequencies through coupling, and then the coverage range of the resonant frequency is adjusted by the adjustment unit, so that the resonant frequency covers the required frequency band range, and multiple frequency bands are concentrated on one antenna unit, which effectively utilizes the space of the mobile phone and solves the problem of insufficient space in the mobile phone. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A general schematic diagram of a mobile terminal provided in one embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present invention;

[0032] Figure 3 For Figure 1 A schematic diagram of a wireless communication system of a mobile terminal shown;

[0033] Figure 4 A flowchart of a multiple-input multiple-output antenna system proposed in the first embodiment of the present invention;

[0034] Figure 5 A schematic diagram of displaying classified photos according to the first embodiment of the present invention;

[0035] Figure 6 A schematic diagram of displaying photos of a first category after classification proposed by the first embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of displaying photos of a first category after classification according to a second embodiment of the present invention.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0039] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0040] The terminal may be implemented in various forms. For example, the terminal described in the present invention may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0041] The following description will be made by taking a mobile terminal as an example, and those skilled in the art will appreciate that, in addition to components specifically used for mobile purposes, the configuration according to the embodiments of the present invention can also be applied to fixed-type terminals.

[0042] See also Figure 1 , see Figure 1 , which is a general schematic diagram of an embodiment of a mobile terminal 1 of the present invention. The mobile terminal 1 includes a plurality of antenna units 20. In this embodiment, four antenna units are used as an example, but the present invention is not limited thereto. Those skilled in the art will understand that Figure 1 The structure of the mobile terminal shown in the figure does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0043] In this embodiment, the configuration and performance of each antenna unit 20 are the same, and both can generate resonant frequencies covering the entire frequency band range of 2500M-4900MHz of 5G, thereby concentrating multiple frequency bands on one antenna unit, effectively utilizing the space in the mobile phone and solving the problem of insufficient space in the mobile phone.

[0044] See also Figure 2 , which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio output unit 103, A / V (audio / video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111 and other components. Those skilled in the art can understand that Figure 1 The structure of the mobile terminal shown in the figure does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0045] Combine the following Figure 2 The following is a detailed introduction to the various components of the mobile terminal:

[0046] The radio frequency unit 101 can be used for receiving and sending signals during information transmission or communication. Specifically, after receiving the downlink information of the base station, it is sent to the processor 110 for processing; in addition, the uplink data is sent to the base station. Generally, the radio frequency unit 101 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc. In addition, the radio frequency unit 101 can also communicate with the network and other devices through wireless communication. The above-mentioned wireless communication can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution) and TDD-LTE (Time Division Duplexing-Long Term Evolution), etc.

[0047] WiFi is a short-range wireless transmission technology. The mobile terminal can help users send and receive emails, browse web pages and access streaming media through the WiFi module 102. It provides users with wireless broadband Internet access. Figure 2 The WiFi module 102 is shown, but it is understandable that it is not an essential component of the mobile terminal and can be omitted as required without changing the essence of the invention.

[0048] The audio output unit 103 can convert the audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, etc. Moreover, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.

[0049] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processor (GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 106. The image frame processed by the graphics processor 1041 can be stored in the memory 109 (or other storage medium) or sent via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) via the microphone 1042 in a telephone call mode, a recording mode, a voice recognition mode, and other operating modes, and can process such sound into audio data. The processed audio (voice) data can be converted into a format output that can be sent to a mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode. The microphone 1042 can implement various types of noise elimination (or suppression) algorithms to eliminate (or suppress) noise or interference generated in the process of receiving and sending audio signals.

[0050] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can also be configured on the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be repeated here.

[0051] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0052] The user input unit 107 can be used to receive input digital or character information, and to generate key signal input related to the user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect the user's touch operation on or near it (such as the user's operation on the touch panel 1071 or near the touch panel 1071 using any suitable object or accessory such as a finger, stylus, etc.), and drive the corresponding connection device according to a pre-set program. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into the touch point coordinates, and then sends it to the processor 110, and can receive and execute the command sent by the processor 110. In addition, the touch panel 1071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 1071, the user input unit 107 may also include other input devices 1072. Specifically, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, a function key (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, etc., which are not specifically limited here.

[0053] Furthermore, the touch panel 1071 may cover the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of the touch event. Then, the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Figure 1 In the figure, the touch panel 1071 and the display panel 1061 are used as two independent components to implement the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to implement the input and output functions of the mobile terminal, which is not limited here.

[0054] The interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

[0055] The memory 109 can be used to store software programs and various data. The memory 109 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 109 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0056] The processor 110 is the control center of the mobile terminal. It uses various interfaces and lines to connect various parts of the entire mobile terminal. It executes various functions of the mobile terminal and processes data by running or executing software programs and / or modules stored in the memory 109, and calling data stored in the memory 109, so as to monitor the mobile terminal as a whole. The processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 110.

[0057] The mobile terminal 100 may also include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system.

[0058] although Figure 2 Not shown, the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0059] To facilitate understanding of the embodiments of the present invention, the communication network system on which the mobile terminal of the present invention is based is described below.

[0060] See also Figure 3 , Figure 3 A communication network system architecture diagram is provided for an embodiment of the present invention. The communication network system is an LTE system of universal mobile communication technology. The LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203 and an operator's IP service 204, which are sequentially connected for communication.

[0061] Specifically, UE201 may be the above-mentioned terminal 100, which will not be described in detail here.

[0062] E-UTRAN 202 includes eNodeB 2021 and other eNodeBs 2022 , etc. Among them, eNodeB 2021 can be connected to other eNodeBs 2022 through a backhaul (eg, an X2 interface), and eNodeB 2021 is connected to EPC 203 , and eNodeB 2021 can provide UE 201 with access to EPC 203 .

[0063] EPC203 may include MME (Mobility Management Entity) 2031, HSS (Home Subscriber Server) 2032, other MMEs 2033, SGW (Serving Gate Way) 2034, PGW (PDN Gate Way) 2035 and PCRF (Policy and Charging Rules Function) 2036, etc. Among them, MME2031 is a control node that processes signaling between UE201 and EPC203, and provides bearer and connection management. HSS2032 is used to provide some registers to manage functions such as home location register (not shown in the figure), and save some user-specific information such as service features and data rates. All user data can be sent through SGW2034, PGW2035 can provide IP address allocation and other functions for UE 201, PCRF2036 is the policy and charging control policy decision point for service data flow and IP bearer resources, which selects and provides available policy and charging control decisions for the policy and charging execution function unit (not shown in the figure).

[0064] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem) or other IP services.

[0065] Although the above introduction takes the LTE system as an example, those skilled in the art should know that the present invention is not only applicable to the LTE system, but also to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA and future new network systems, etc., which are not limited here.

[0066] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0067] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0068] The terminal can be implemented in various forms. For example, the terminal described in the present invention may include mobile terminals such as mobile phones, tablet computers, cameras, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0069] It will be understood by those skilled in the art that, in addition to elements specifically for mobile purposes, the configuration according to the embodiments of the present invention can also be applied to fixed-type terminals.

[0070] Based on the above terminal hardware structure and communication network, the present invention is described in detail below through specific embodiments.

[0071] Please also refer to the attached Figure 4 And attached Figure 5 , Figure 4 FIG. 1 is a schematic diagram of the structure of a first embodiment of a multiple-input multiple-output antenna system according to the present invention, and FIG. Figure 5 Schematic diagram of a part of the structure of the metal frame of the present invention. The multi-input multi-output antenna system proposed by the present invention is applied to a mobile terminal, such as a 5G mobile phone terminal. Figure 4 and Figure 5 As shown, the MIMO antenna system 10 includes a metal frame 101 , a plurality of slots 102 , bonding points 103 , a metal bottom shell 104 and a plurality of adjustment units 105 .

[0072] A plurality of slots 102 are provided on the metal frame 101, and a bridging point 103 is provided on the metal frame on both sides of each slot 102. The metal frame 101, each slot 102 and the corresponding bridging point 103 form an antenna, and each slot 102 divides the metal frame 101 into two upper and lower metal parts, which are coupled to generate two resonant frequencies. The metal bottom shell 104 is provided in the metal frame 101. Figure 5 The metal bottom shell 104 is provided with a clearance area 1014, and the clearance area 1014 is a non-metallic medium. In the present embodiment, the clearance area 1014 is a hollowed-out portion of the metal bottom shell 104. A clearance 106 is provided for each antenna, and the clearance area 1014 is provided on one side of the antenna and is half contained in the antenna. A plurality of adjustment units 105 are provided on the metal bottom shell 104, corresponding one to one to the plurality of gaps 102, and each adjustment unit 105 is connected to the antenna through a lap point 103, and is used to adjust the two resonant frequencies generated by coupling between the upper and lower metal parts. In the present embodiment, the adjustment unit 105 is mounted on a PCB, and a spring sheet T is provided on the PCB board. The adjustment unit 105 is electrically connected to the spring sheet T, and is contacted and connected with the lap point 103 of the metal frame 101 through the spring sheet T.

[0073] In a specific embodiment of the present invention, the number of the slits 102 of the plurality of metal frames is 4, the number of the plurality of adjustment units 105 is 4, and the slits 102 of the metal frames correspond one-to-one to the adjustment units 105, thereby forming a 4*4 multi-input multi-output antenna. It can be understood that the above is only for a better explanation of the present invention, and the number of slits in the metal frame and the number of adjustment units are not limited to 4. Each adjustment unit 105, the metal frame 101, each slit 102 and the corresponding overlap point 103 constitute an antenna unit 20, and each antenna unit 20 has the same configuration and performance. The resonant frequency of the antenna is adjusted by the adjustment unit 105 so that the resonant frequency of the antenna can cover the entire frequency band range of 2500M-4900MHz of 5G.

[0074] Further combined with Figure 5 , each gap 102 has the same structure, and in this embodiment, one gap 102 is taken as an example to illustrate the structure of the metal frame 101.

[0075] In this embodiment, the overlap point 103 includes a first overlap point 10111, a feed point overlap point 1012, and a second overlap point 1013. The width of the gap 102 is 1-2 mm, dividing the metal frame 101 into two parts, an upper and a lower part. The first overlap point 1011 is arranged above the gap 102, and the distance from the gap 101 is about 5 mm. In this embodiment, the distance between the first overlap point 1011 and the gap 102 is 5 mm. The feed point overlap point 1012 is arranged below the gap 102, and the distance from the gap 102 is about 5 mm. In this embodiment, the distance between the feed point overlap point 1012 and the gap 102 is 5 mm. The second overlap point 1013 is arranged below the feed point overlap point 1012, and the distance from the gap 102 is about 10 mm. In this embodiment, the distance between the second overlap point 1013 and the gap 102 is 10 mm. It is understandable that the distance between the first overlap point 1011, the second overlap point 1013, the feed point overlap point 1012 and the gap 102 can be adjusted according to actual needs. The hollow area between the metal frame 101 and the metal bottom shell 104 is a clearance area 1014, the upper side of the clearance area 1014 is located above the first overlap point 1011, the lower side of the clearance area 1014 is located below the second overlap point 1013, and the side of the clearance area 1014 is located on the left side of the first overlap point 1011, the feed point overlap point 1012 and the second overlap point 1013, so that the clearance area 1014 exists around the antenna composed of the metal frame 101, the gap 102, the first overlap point 1011, the feed point overlap point 1012 and the second overlap point 1013.

[0076] Through the implementation of this embodiment, the gap divides the metal frame into two upper and lower metal parts. The upper and lower metal parts generate two resonant frequencies through coupling, and then the coverage range of the resonant frequency is adjusted by the adjustment unit, so that the resonant frequency covers the entire frequency band range of 2500M-4900MHz of 5G, and multiple frequency bands are concentrated on one antenna unit, which effectively utilizes the space of the mobile phone and solves the problem of insufficient space in the mobile phone.

[0077] Figure 6 FIG. 1 is a partial structural diagram of a second embodiment of the multi-input multi-output antenna system of the present invention. The multi-input multi-output antenna system proposed in the present invention is applied to a 5G mobile terminal, such as a 5G mobile phone terminal. Figure 6 As shown, the MIMO antenna system 10a includes a metal frame 101a, a plurality of slots 102a, a bonding point, a metal bottom shell 104a and a plurality of adjustment units 105a, wherein the bonding point includes a first bonding point 1011a, a feed point bonding point 1012a and a second bonding point 1013a.

[0078] A plurality of slots 102a are provided on the metal frame 101a. A lap joint is provided on the metal frame 101a at the upper and lower sides of each slot 102a. The metal frame 101a, each slot 102a and the corresponding lap joint form an antenna. The upper and lower metal parts of each slot 102a are coupled to generate two resonant frequencies. The metal bottom shell 104a is provided in the metal frame 101a. Figure 4 The metal bottom shell 104a is provided with a clearance area 1014, and the clearance area 1014 is a non-metallic medium. In this embodiment, the clearance area 1014 is a hollowed-out portion of the metal bottom shell 104a. A clearance area 1014 is provided for each antenna, and the clearance area 1014 is provided on one side of the antenna and is half contained in the antenna. A plurality of adjustment units 105a are provided on the metal bottom shell 104a, corresponding one to one with a plurality of gaps 102a, and each adjustment unit 105a is connected to the antenna through a lap point for adjusting the two resonant frequencies. The lap points include a first lap point 1011a, a feed point lap point 1012a, and a second lap point 1013a.

[0079] In a specific embodiment of the present invention, the number of the plurality of slots 102a is 4, the number of the plurality of adjustment units 105a is 4, and the slots 102a correspond to the adjustment units 105a one-to-one, thereby forming a 4*4 multi-input multi-output antenna. It can be understood that the above is only for a better explanation of the present invention, and the number of slots 102a and the number of adjustment units 105a are not limited to 4. Each adjustment unit 105a, each slot 105a and the corresponding overlap point constitute an antenna unit 20a, and each antenna unit 20a has the same settings and performance. The resonant frequency of the antenna is adjusted by the adjustment unit 105a so that the resonant frequency of the antenna can cover the entire frequency band range of 2500M-4900MHz of 5G.

[0080] In this embodiment, the MIMO antenna system 10a further includes a control unit 106a, which is electrically connected to the adjustment unit 105a and is used to control the adjustment unit 105a. The adjustment unit 105a is mounted on a PCB board, and the adjustment unit 105a includes a feeding point K, a first electronic switch S1, a second electronic switch S2, a first capacitor C1, a second capacitor C2, a first inductor L1, and a second inductor L2. The feeding point K is connected to the feeding point bridging point 1012a. In this embodiment, the feeding point K is connected to a spring piece A mounted on the PCB board, and is contacted and connected to the feeding point bridging point 1012a on the metal frame 101a through the spring piece A. The first electronic switch S1 includes a control end, a first end and a second end. The first end is electrically connected to the first bridging point 1011a through the first capacitor C1, and the second end is electrically connected to the first bridging point 1011a through the first inductor L1. The first inductor L1 is connected to the spring B installed on the PCB, and is in contact with the first bridging point 1011a on the metal frame 101a through the spring B. The capacitance value range of the first capacitor C1 is: 0-10pf. In other embodiments of the present invention, the first capacitor C1 can also be replaced by an inductor with an inductance value of 1-60nH. The inductance value of the first inductor L1 is 1-100nH. The second electronic switch S2 includes a control end, a first end and a second end, wherein the first end is electrically connected to the second bridging point 1013a through the second capacitor C2, and the second end is electrically connected to the second bridging point 1013a through the second inductor L2, and the second inductor L2 is connected to the spring C installed on the PCB, and is in contact with the second bridging point 1013a on the metal frame 101a through the spring C. The capacitance value range of the second capacitor C2 is: 0-10pf. In other embodiments of the present invention, the second capacitor C2 can also be replaced by an inductor with an inductance value of 1-60nH. The inductance value of the second inductor L2 is 1-60nH. The control unit 106a is electrically connected to the control end of the first electronic switch S1 and the control end of the second electronic switch S2.

[0081] In this embodiment, the control unit 106a controls the first electronic switch S1 to be connected to the first capacitor C1, and controls the second electronic switch S2 to be connected to the second capacitor C2, so that the two resonant frequencies cover 2500M-2700MHz and 4400M-4900MHz. Further, when the control unit 106a controls the first electronic switch S1 to switch to the first inductor L1, a resonant frequency of 3300M-3800MHz can be generated. When the control unit 106a controls the second electronic switch S2 to switch to the second inductor L2, a resonant frequency of 3300M-4200MHz can be generated.

[0082] In other embodiments of the present invention, when the antenna is in the testing phase, the first electronic switch S1 is connected to the first connection point 1011a through the first debugging seat (not shown), and the second electronic switch S2 is connected to the second connection point 1013a through the second debugging seat (not shown). The first debugging seat and the second debugging seat can be installed with different capacitors or inductors, so that the first electronic switch S1 and the second electronic switch S2 can be connected to different capacitors or inductors. When the antenna is being tested, the first debugging seat and the second debugging seat are first installed with a 0 ohm resistor, so that the first electronic switch S1 and the second electronic switch S2 are connected to the 0 ohm resistor, and the antenna generates a resonant frequency within the two frequency bands of 2496M-2690MHz and 4400M-5000MHz, and then the components connected to the first electronic switch S1 and the second electronic switch S2 are changed to capacitors or inductors, that is, the 0 ohm resistors of the first debugging seat and the second debugging seat are replaced with capacitors or inductors for further adjustment, so that the two resonant frequencies cover 2500M-2700MHz and 4400M-4900MHz. The first electronic switch S1 is controlled to switch to the first inductor L1 to generate a resonant frequency of 3300M-3800MHz, and the second electronic switch S2 is controlled to switch to the second inductor L2. Further adjustment is made to expand the resonant frequency to generate a resonant frequency of 3300M-4200MHz.

[0083] Combined with Figure 4In this embodiment, the overlap points include a first overlap point 1011a, a second overlap point 1013a, and a feed point overlap point 1012a. The width of the gap 102a of the metal frame 101a is 1-2mm, dividing the metal frame into two parts, an upper part and an lower part. The first overlap point 1011a is arranged above the gap 102a, and the distance from the gap 102a is about 5mm. In this embodiment, the distance from the first overlap point 1011a to the gap 102a is 5mm. The feed point overlap point 1012a is arranged below the gap 102a, and the distance from the gap 102a is about 5mm. In this embodiment, the distance from the feed point overlap point 1012a to the gap 102a is 5mm. The second lap point 1013a is placed below the feed point lap point 1012a, and is about 10 mm away from the gap 102a. In this embodiment, the distance between the second lap point 103a and the gap 102a is 10 mm. It is understandable that the distances between the first lap point 1011a, the second lap point 1013a, the feed point lap point 1012a and the gap 102a can be adjusted according to actual needs. The hollow area between the metal frame 101a and the metal bottom shell 104a is a clearance area, the upper side of the clearance area is located above the first overlap point 1011a, the lower side of the clearance area 1014a is located below the second overlap point 1013a, and the side of the clearance area is located on the left side of the first overlap point 1011a, the second overlap point 1013a and the feeding point overlap point 1012a, so that the clearance area half includes the antenna, so that there is a clearance area around the antenna composed of the metal frame 101a and the first overlap point 1011a, the feeding point overlap point 1012a and the second overlap point 1013a.

[0084] Through the implementation of this embodiment, the resonant frequency is adjusted by controlling the first electronic switch S1 and the second electronic switch S2 of the adjustment unit 105a to switch and connect to different components, so that the resonant frequency covers the entire frequency band range of 2500-4900MHz of 5G, and multiple frequency bands are concentrated on one antenna unit, which effectively utilizes the mobile phone space and solves the problem of insufficient mobile phone space.

[0085] Figure 7 It is a partial structural diagram of the third embodiment of the multi-input multi-output antenna system of the present invention. The multi-input multi-output antenna system proposed in the present invention is applied to mobile terminals, such as 5G mobile phone terminals. In this embodiment, the multi-input multi-output antenna system 10b includes a metal frame 101b, a plurality of gaps 102b, a lap joint, a metal bottom shell 104b and a plurality of adjustment units 105b, wherein the lap joint includes a first lap joint 1011b, a feed point lap joint 1012b and a second lap joint 1013b.

[0086] A plurality of slots 102b are arranged on the metal frame 101b. Overlapping points are arranged on the metal frame 101b on the upper and lower sides of each slot 102b. The metal frame 101b, each slot 102b and the corresponding overlapping points form an antenna. The upper and lower metal parts of each slot 102b are coupled to generate two resonant frequencies. The metal bottom shell 104b is arranged in the metal frame 101b, and the metal bottom shell 104b is provided with a clearance area, and the clearance area is a non-metallic medium. In this embodiment, the clearance area is the hollowed-out part of the metal bottom shell 104b. A clearance area is arranged corresponding to each antenna, and the clearance area is arranged on one side of the antenna and is half contained in the antenna. A plurality of adjustment units 105b are arranged on the metal bottom shell 104b, corresponding one to one with the plurality of slots 102b, and each adjustment unit 105b is connected to the antenna through the overlapping points for adjusting the two resonant frequencies.

[0087] In a specific embodiment of the present invention, the number of the plurality of slots 102b is 4, the number of the plurality of adjustment units 105b is 4, and the slots 102b correspond to the adjustment units 105b one-to-one, thereby forming a 4*4 multi-input multi-output antenna. It can be understood that the above is only for a better explanation of the present invention, and the number of slots 102b and the number of adjustment units 105b are not limited to 4. Each adjustment unit 105b, each slot 102b and the corresponding overlap point constitute an antenna unit 20b, and each antenna unit 20b has the same configuration and performance. The resonant frequency of the antenna is adjusted by the adjustment unit 105b so that the resonant frequency of the antenna can cover the entire frequency band range of 2500M-4900MHz of 5G.

[0088] In this embodiment, the adjustment unit 105b is installed on the PCB board, and the adjustment unit 105b includes a feeding point K1, a third capacitor C3 and a fourth capacitor C4. If the first electronic switch or the second electronic switch in the adjustment unit in the previous embodiment can adjust the required frequency band range with only one path, the resonant frequency of the antenna can be adjusted in a fixed debugging manner to solve the cost and space. That is, the resonant frequency of the antenna is adjusted by the third capacitor C3 and the fourth capacitor C4. It can be understood that in other embodiments of the present invention, the resonant frequency of the antenna can be adjusted by inductance. Feeding point K1 is connected to the feeding point lap point 1012b. In this embodiment, the feeding point K1 is connected to the spring D installed on the PCB board, and is contacted and connected with the feeding point lap point 1012b on the metal frame 101b through the spring D. One end of the third capacitor C3 is electrically connected to the first lap point 1011b, and the other end is grounded for adjusting the resonant frequency. In this embodiment, one end of the third capacitor C3 is connected to the spring E mounted on the PCB, and is in contact with the first bridging point 1011b on the metal frame 101b through the spring E. One end of the fourth capacitor C4 is electrically connected to the second bridging point 1013b, and the other end is grounded, for adjusting the resonant frequency. In this embodiment, one end of the fourth capacitor C4 is connected to the spring F mounted on the PCB, and is in contact with the second bridging point 1013b on the metal frame 101b through the spring F.

[0089] In this embodiment, the overlap points include a first overlap point 1011b, a second overlap point 1013b, and a feed point overlap point 1012b. The width of the gap 102b is 1-2mm, dividing the metal frame 101 into two parts, an upper part and an lower part. The first overlap point 1011b is arranged above the gap 102b, and the distance from the gap 102b is about 5mm. In this embodiment, the distance from the first overlap point 1011b to the gap 102b is 5mm. The feed point overlap point 1012b is arranged below the gap, and the distance from the gap 102b is about 5mm. In this embodiment, the distance from the feed point overlap point 1012b to the gap 102b is 5mm. The second lap point 1013b is disposed below the feed point lap point 1012b, and is about 10 mm away from the gap 102b. In this embodiment, the second lap point 1013b is 10 mm away from the gap 102b. It is understandable that the distances between the first lap point 1011b, the second lap point 1013b, the feed point lap point 1012b and the gap 102b can be adjusted according to actual needs. The hollow area between the metal frame 101b and the metal bottom shell 104b is a clearance area, the upper side of the clearance area is located above the first overlap point 1011b, the lower side of the clearance area is located below the second overlap point 1013b, and the side of the clearance area is located on the left side of the first overlap point 1011b, the feed point overlap point 1012b and the second overlap point 1013b, so that the clearance area is half included in the antenna, so that there is a clearance area around the antenna composed of the metal frame 101b and the first overlap point 1011b, the feed point overlap point 1012b and the second overlap point 1013b.

[0090] Through the implementation of this embodiment, the adjustment unit adjusts the resonant frequency of the antenna in a fixed debugging manner, so that the resonant frequency covers the entire frequency band range of 2500M-4900MHz of 5G, effectively utilizing the mobile phone space and solving the problem of insufficient mobile phone space.

[0091] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0092] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0093] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods of various embodiments of the present invention.

[0094] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multiple-input multiple-output antenna system, applied to a mobile terminal, characterized in that: The multiple-input multiple-output antenna system comprises: A metal frame is provided with a plurality of slots, and overlapping points are provided on the metal frames on both sides of each slot, the metal frame, each slot and the corresponding overlapping points form an antenna, and the upper and lower metal frames of each slot are coupled to generate two resonant frequencies; A metal bottom shell is arranged in the metal frame, and the metal bottom shell is provided with a clearance area; A plurality of adjustment units are arranged on the metal bottom shell and correspond to the plurality of gaps one by one, and each adjustment unit is connected to the antenna through the overlap point to adjust the two resonant frequencies; Each antenna is correspondingly provided with a clearance area, and the clearance area is provided on one side of the antenna and is half contained in the antenna; The width of the plurality of gaps ranges from 1 to 2 mm; The overlapping points include: The first overlap point is arranged above the gap and is 5 mm away from the gap; The feed point overlap point is arranged below the gap and is 5 mm away from the gap; The second overlap point is arranged below the feed point overlap point and is 10 mm away from the gap; The upper side of the clearance area is located above the first overlap point, the lower side of the clearance area is located below the second overlap point, and the side edge of the clearance area is located on the left side of the overlap point, so that the clearance area half contains the antenna; The system further comprises a control unit, wherein the regulating unit comprises: A feed point connected to the feed point landing point; A first electronic switch, comprising a control end, a first end and a second end, wherein the first end is electrically connected to the first junction point via a first capacitor, and the second end is electrically connected to the first junction point via a first inductor; The second electronic switch comprises a control end, a first end and a second end, wherein the first end is electrically connected to the second junction point through a second capacitor, and the second end is electrically connected to the second junction point through a second inductor; wherein, The control unit is electrically connected to the control unit of the first electronic switch and the second end of the second electronic switch; The control unit controls the first electronic switch to be connected to the first capacitor, and controls the second electronic switch to be connected to the second capacitor, so that the two resonant frequencies cover 2500M-2700MHz and 4400M-4900MHz; When the control unit controls the first electronic switch to switch to the first inductor, a resonant frequency of 3300-3800 MHz may be generated; When the control unit controls the second electronic switch to switch to the second inductor, a resonant frequency of 3300-4200 MHz can be generated; The adjustment unit comprises: A third capacitor, one end of which is electrically connected to the first connecting point and the other end of which is grounded, and is used to adjust the resonant frequency; a fourth capacitor, one end of which is electrically connected to the second connecting point and the other end of which is grounded, and is used to adjust the resonant frequency; a feed point electrically connected to the feed point landing point; The number of the plurality of slots and the plurality of adjustment units is 4, each adjustment unit, each slot and the corresponding overlap point constitute an antenna unit, and the configuration and performance of each antenna unit are the same.

2. A mobile terminal, characterized in that: The mobile terminal comprises the MIMO antenna system according to claim 1.

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