Antenna system and mobile terminal

Abstract

The present invention discloses an antenna system and a mobile terminal, the antenna system comprising: a first metal strip, a second metal strip, a connecting device for connecting or disconnecting the first metal strip and the second metal strip, and a first adjusting device and a second adjusting device; when the connecting device is in a disconnected state, the first metal strip serves as a radiator; the radiator is adjusted by the first adjusting device so that the radiator generates intermediate frequency, high frequency, and ultra-high frequency signals; when the connecting device is in a connected state, the first metal strip and the second metal strip serve together as a radiator, and the radiator is adjusted by the second adjusting device so that the radiator generates a low-frequency signal. The technical solution of the present invention achieves full coverage of 5G frequency band signals, thereby effectively meeting the needs of users for different frequency bands.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular to an antenna system and a mobile terminal. Background Art

[0002] 5G is the abbreviation of the fifth generation of mobile communications. As 5G communications have 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 communications. In addition, due to the limited space of mobile phone terminals, there are high requirements for the layout of 5G frequency bands. It is best to use one module to meet the needs of multiple frequency bands, which can save the space structure of mobile phones and solve the problem of insufficient space.

[0003] At present, the commonly used 5G frequency bands at home and abroad cover from 700MHz to 4000MHz. In addition to the low frequency (700M-900M), medium frequency (1710M-2170M), and high frequency (2500-2700) that are the same as the 4G frequency bands, there are also newly added 5G ultra-high frequency bands (3300MHz-3800MHz, 4400MHz-4900MHz, 3300M-4200M). Due to the different requirements of different countries for frequency bands, the existing antenna system can no longer meet the needs of users. Summary of the invention

[0004] The main purpose of the present invention is to provide an antenna system to achieve full coverage of 5G frequency band signals and effectively meet users' needs for different frequency bands.

[0005] To achieve the above object, the antenna system proposed in the present invention includes: a first metal strip, a second metal strip, a connecting device for connecting or disconnecting the first metal strip and the second metal strip, and a first adjusting device and a second adjusting device;

[0006] When the connecting device is in a disconnected state, the first metal strip serves as a radiator; the radiator is adjusted by the first adjusting device so that the radiator generates intermediate frequency, high frequency, and ultra-high frequency signals;

[0007] When the connecting device is in a connected state, the first metal strip and the second metal strip together serve as a radiator, and the radiator is adjusted by the second adjusting device so that the radiator generates a low-frequency signal.

[0008] Optionally, the first regulating device includes: a first regulating switch and a first regulating circuit; the first regulating switch is used to connect or disconnect the first metal strip and the first regulating circuit.

[0009] Optionally, the first regulating circuit includes a first capacitor, a first inductor and a first resistor connected in parallel; the first regulating switch is used to electrically connect the first capacitor, the first inductor or the first resistor to the first metal strip.

[0010] Optionally, the first capacitor is an adjustable capacitor, the first inductor is an adjustable inductor, and the first resistor is an adjustable resistor.

[0011] Optionally, the second regulating device includes: a second regulating switch and a second regulating circuit; the second regulating switch is used to connect or disconnect the second metal strip and the second regulating circuit.

[0012] Optionally, the second regulating circuit includes a second capacitor, a second inductor and a second resistor connected in parallel; the second regulating switch is used to electrically connect the second capacitor, the second inductor or the second resistor to the second metal strip.

[0013] Optionally, the second capacitor is an adjustable capacitor, the second inductor is an adjustable inductor, and the second resistor is an adjustable resistor.

[0014] In addition, the present invention also provides a mobile terminal, comprising at least one antenna system, the antenna system comprising: a first metal strip, a second metal strip, a connecting device for connecting or disconnecting the first metal strip and the second metal strip, and a first adjusting device and a second adjusting device;

[0015] When the connecting device is in a disconnected state, the first metal strip serves as a radiator; the radiator is adjusted by the first adjusting device so that the radiator generates intermediate frequency, high frequency, and ultra-high frequency signals;

[0016] When the connecting device is in a connected state, the first metal strip and the second metal strip together serve as a radiator, and the radiator is adjusted by the second adjusting device so that the radiator generates a low-frequency signal.

[0017] Optionally, the first metal bar and the second metal bar are formed by a metal outer frame of the mobile terminal.

[0018] Optionally, the mobile terminal includes four antenna systems.

[0019] The technical solution of the present invention can adjust the length of the radiator according to actual needs through the first metal strip and the second metal strip arranged at intervals, and the connecting device for connecting or disconnecting the first metal strip and the second metal strip, so as to generate signals of different frequency bands, and adjust the first metal strip and the second metal strip through the first adjusting device and the second adjusting device, so that the radiator can generate corresponding low-frequency, medium-frequency, high-frequency, and ultra-high-frequency signals, thereby achieving full coverage of 5G frequency band signals, thereby effectively meeting the needs of users for different frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present invention;

[0022] Figure 2 A communication network system architecture diagram provided for an embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of an embodiment of an antenna system of the present invention;

[0024] Figure 4 It is a structural diagram of an embodiment of a mobile terminal of the present invention.

[0025] 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

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] See also Figure 1 , 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.

[0031] Combine the following Figure 1 The following is a detailed introduction to the various components of the mobile terminal:

[0032] 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.

[0033] WiFi is a short-range wireless transmission technology. Mobile terminals can help users send and receive emails, browse web pages, and access streaming media through WiFi module 102. It provides users with wireless broadband Internet access. Figure 1 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] although Figure 1 Not shown, the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0045] 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.

[0046] See also Figure 2 , Figure 2 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.

[0047] Specifically, UE201 may be the above-mentioned mobile terminal 100, which will not be described in detail here.

[0048] 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 .

[0049] 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).

[0050] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem) or other IP services.

[0051] 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.

[0052] Based on the above mobile terminal hardware structure and communication network system, various embodiments of the method of the present invention are proposed.

[0053] like Figure 3 As shown, Figure 3 It is a schematic structural diagram of an antenna system according to an embodiment of the present invention.

[0054] In this embodiment, the antenna system includes: a first metal strip 310, a second metal strip 320, a connecting device 330 for connecting or disconnecting the first metal strip 310 and the second metal strip 320, and a first adjusting device 340 and a second adjusting device 350.

[0055] When the connecting device 330 is in a disconnected state, the first metal strip 310 acts as a radiator; the radiator is adjusted by the first adjusting device 340 so that the radiator generates intermediate frequency (1710-2170MHz), high frequency (2500-2700MHz), and ultra-high frequency (3300-4900MHz) signals.

[0056] Specifically, in this embodiment, the first regulating device 340 includes: a first regulating switch 341 and a first regulating circuit; the first regulating switch 341 is used to connect or disconnect the first metal strip 310 and the first regulating circuit. The first regulating circuit includes a first capacitor 342, a first inductor 343 and a first resistor 345 connected in parallel; the first regulating switch 341 is used to electrically connect the first capacitor 342, the first inductor 343 or the first resistor 345 to the first metal strip 310. The first capacitor 342 is an adjustable capacitor, the first inductor 343 is an adjustable inductor, and the first resistor 345 is an adjustable resistor.

[0057] Based on the above structure, the specific adjustment methods in this embodiment include:

[0058] When the connecting device 330 and the first regulating switch 341 are both in the disconnected state, the length of the first metal strip 310 is just enough to generate an intermediate frequency signal (1710-2170Mhz), meeting the requirements of the N1 / N3 frequency band.

[0059] When the connecting device 330 is in a disconnected state and the first adjusting switch 341 connects the first capacitor 342, the first inductor 343, or the first resistor 345 to the first metal strip 310, the first metal strip 310 generates a high-frequency signal (2500-2700Mhz) and an ultra-high-frequency signal (3300-4900Mhz) to meet the requirements of the N41 frequency band and the N77 frequency band.

[0060] In addition, it can also be achieved through the following adjustment methods:

[0061] When the connecting device 330 is in a disconnected state, and the first regulating switch 341 connects the first capacitor 342 to the first metal strip 310, and the first capacitor 342 is adjusted to 1 pf, the first metal strip 310 generates a signal in the N3 frequency band (1710-1785 Mhz).

[0062] When the connecting device 330 is in a disconnected state, and the first regulating switch 341 connects the first inductor 343 to the first metal strip 310, and the first inductor 343 is adjusted to 4NH, the first metal strip 310 generates a signal in the N41 frequency band (2496-2690Mhz).

[0063] When the connecting device 330 is in a disconnected state, and the first regulating switch 341 connects the first resistor 345 to the first metal strip 310, and the first resistor 345 is adjusted to 0 ohm, the first metal strip 310 generates a signal in the N78 frequency band (3300-3800Mhz).

[0064] When the connecting device 330 is in a connected state, the first metal strip 310 and the second metal strip 320 together serve as a radiator, and the radiator is adjusted by the second adjusting device 350 so that the radiator generates a low-frequency signal.

[0065] Specifically, in this embodiment, the second regulating device 350 includes: a second regulating switch 351 and a second regulating circuit; the second regulating switch 351 is used to connect or disconnect the second metal strip 320 and the second regulating circuit. The second regulating circuit includes a second capacitor 352, a second inductor 353 and a second resistor 354 connected in parallel; the second regulating switch 351 is used to electrically connect the second capacitor 352, the second inductor 353 or the second resistor 354 to the second metal strip 320. Optionally, the second capacitor 352 is an adjustable capacitor, the second inductor 353 is an adjustable inductor, and the second resistor 354 is an adjustable resistor.

[0066] Based on the above structure, the specific adjustment methods in this embodiment include:

[0067] When the connecting device 330 is in a connected state, and the first regulating switch 341 and the second regulating switch 351 are both in a disconnected state, the first metal strip 310 and the second metal strip 320 act together as a radiator, and their total length just generates a low-frequency signal (700-900Mhz), meeting the requirements of the N8 / N20 / N28 frequency band. By electrically connecting the second capacitor 352, the second inductor 353 or the second resistor 354 to the second metal strip 320 through the second regulating switch 351, and adjusting the values ​​of the second capacitor 352, the second inductor 353, and the second resistor 354, the frequency band of the signal generated by the radiator can be further adjusted, which will not be repeated here.

[0068] In the embodiment of the present invention, by means of the first metal strip 310 and the second metal strip 320 which are arranged at intervals, and the connecting device 330 for connecting or disconnecting the first metal strip 310 and the second metal strip 320, the length of the radiator can be adjusted according to actual needs to generate signals of different frequency bands, and the first metal strip 310 and the second metal strip 320 can be adjusted by means of the first adjusting device 340 and the second adjusting device 350 so that the radiator can generate corresponding low-frequency, medium-frequency, high-frequency, and ultra-high-frequency signals, thereby achieving full coverage of 5G frequency band signals and effectively meeting the user's needs for different frequency bands.

[0069] The present invention also provides a mobile terminal (such as Figure 4 As shown in the figure, the mobile terminal 100 includes at least one antenna system 300 of any of the above embodiments, and the first metal strip and the second metal strip in the antenna system 300 are formed by the metal outer frame of the mobile terminal 100 (specifically, the first metal strip and the second metal strip can be formed by slotting the metal frame of the mobile terminal). Since the mobile terminal 100 adopts the technical solution of the above embodiments, the mobile terminal 100 at least has the technical effect of the above embodiments, which will not be described in detail here.

[0070] In addition, it is worth mentioning that the mobile terminal 100 may include two or more antenna systems 300. For example, the mobile terminal 100 includes four antenna systems 300.

[0071] 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.

[0072] 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.

[0073] 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 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 enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0074] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An antenna system, characterized in that: include: A first metal strip, a second metal strip, a connecting device for connecting or disconnecting the first metal strip and the second metal strip, and a first adjusting device and a second adjusting device; When the connecting device is in a disconnected state, the first metal strip serves as a radiator; the radiator is adjusted by the first adjusting device so that the radiator generates intermediate frequency, high frequency, and ultra-high frequency signals; When the connecting device is in a connected state, the first metal strip and the second metal strip together serve as a radiator, and the radiator is adjusted by the second adjusting device so that the radiator generates a low-frequency signal; The first regulating device comprises: a first regulating switch and a first regulating circuit; the first regulating switch is used to connect or disconnect the first metal strip and the first regulating circuit; The first regulating circuit includes a first capacitor, a first inductor and a first resistor connected in parallel; the first regulating switch is used to electrically connect the first capacitor, the first inductor or the first resistor to the first metal strip; The first capacitor is an adjustable capacitor, the first inductor is an adjustable inductor, and the first resistor is an adjustable resistor; The second regulating device comprises: a second regulating switch and a second regulating circuit; the second regulating switch is used to connect or disconnect the second metal strip and the second regulating circuit; The second regulating circuit includes a second capacitor, a second inductor and a second resistor connected in parallel; the second regulating switch is used to electrically connect the second capacitor, the second inductor or the second resistor to the second metal strip; The second capacitor is an adjustable capacitor, the second inductor is an adjustable inductor, and the second resistor is an adjustable resistor; in, When the connecting device and the first regulating switch are both in the disconnected state, the length of the first metal strip generates an intermediate frequency signal of 1710-2170Mhz, meeting the requirements of the N1 / N3 frequency band; When the connecting device is in a disconnected state, and the first regulating switch connects the first capacitor, the first inductor, or the first resistor to the first metal strip, the first metal strip generates a high-frequency signal of 2500-2700Mhz and an ultra-high-frequency signal of 3300-4900Mhz, meeting the requirements of the N41 frequency band and the N77 frequency band; When the connecting device is in a connected state, and the first regulating switch and the second regulating switch are both in a disconnected state, the first metal strip and the second metal strip together serve as a radiator, and their total length generates a low-frequency signal of 700-900Mhz, meeting the requirements of the N8 / N20 / N28 frequency band; The second capacitor, the second inductor or the second resistor is electrically connected to the second metal strip through the second adjustment switch, and the values ​​of the second capacitor, the second inductor and the second resistor are adjusted to further adjust the frequency band of the signal generated by the radiator.

2. A mobile terminal, characterized in that: The invention comprises at least one antenna system as claimed in claim 1.

3. The mobile terminal according to claim 2, characterized in that: The first metal strip and the second metal strip are formed by a metal outer frame of the mobile terminal.

4. The mobile terminal according to claim 2, characterized in that: Four of the antenna systems are included.

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