Mobile terminal antenna system and mobile terminal

Abstract

Embodiments of the present disclosure provide a mobile terminal antenna system and a mobile terminal. The mobile terminal antenna system includes an antenna supporting a satellite communication signal frequency band, a first intermediate electrical device, and an antenna extension with a satellite antenna extension ground, wherein the antenna is capable of being coupled with a circuit board with a reference ground of the mobile terminal for signal transmission and reception, the first intermediate electrical device is used for connection between the circuit board and the antenna extension ground, and the antenna extension ground is used for being spaced apart from the circuit board and the antenna, so that the antenna extension ground is capable of increasing a length of the reference ground.

Description

Technical Field

[0001] This disclosure relates to the field of consumer electronics technology such as mobile phones and tablets, and in particular to an antenna system used on a mobile terminal. Specifically, it relates to a mobile terminal antenna system and a mobile terminal. Background Technology

[0002] With the development of 5G technology and people's demand for network communication in special use cases (mountain climbing, navigation, etc.), conventional network communication can no longer meet the requirements. Satellite communication can effectively solve the above problems and is an important way for future communication development. How to integrate satellite communication antennas into mobile terminals is a key issue currently facing various consumer mobile terminals. Summary of the Invention

[0003] According to one aspect of this disclosure, the following are provided:

[0004] A mobile terminal antenna system includes an antenna supporting a satellite communication signal frequency band, a first intermediate electrical device, and an antenna extension ground with a satellite antenna extension ground. The antenna is coupled to a circuit board of the mobile terminal with a reference ground for signal transmission and reception. The first intermediate electrical device is connected between the circuit board and the antenna extension ground. The antenna extension ground is spaced apart from the circuit board and the antenna, such that the antenna extension ground can increase the length of the reference ground.

[0005] Optionally, according to one embodiment of this disclosure, the first intermediate electrical device includes a first inductor.

[0006] Optionally, according to one embodiment of the present disclosure, the first intermediate electrical device includes a first switch for opening and / or switching the antenna path.

[0007] Optionally, according to one embodiment of this disclosure, the antenna includes a satellite communication antenna and a first network standard antenna.

[0008] Optionally, according to one embodiment of this disclosure, the antenna supporting the satellite communication signal frequency band and the first network standard antenna share a common radiator.

[0009] Optionally, according to one embodiment of the present disclosure, the mobile terminal antenna system further includes a first filtering circuit, which is connected between the antenna and the circuit board.

[0010] Optionally, according to one embodiment of this disclosure, the first filtering circuit includes a filter inductor and / or a filter capacitor.

[0011] Optionally, according to one embodiment of the present disclosure, the mobile terminal antenna system further includes an antenna signal feeding device, which can be disposed on the circuit board and connected to the antenna.

[0012] Optionally, according to one embodiment of this disclosure, the antenna signal feeding device includes a satellite antenna signal feeding device and a first network standard antenna signal feeding device.

[0013] Optionally, according to one embodiment of the present disclosure, the mobile terminal antenna system further includes a second network standard antenna signal feeding device and a second filtering and / or switching circuit connected to each other, wherein the second network standard antenna signal feeding device and the second filtering and / or switching circuit are used to connect between the circuit board and the antenna extension ground.

[0014] Optionally, according to one embodiment of this disclosure, the mobile terminal antenna system further includes a third filtering and / or switching circuit, the third filtering and / or switching circuit being connected between the first intermediate electrical device and the antenna extension ground.

[0015] Optionally, according to one embodiment of the present disclosure, the mobile terminal antenna system further includes a second intermediate electrical device, which is used to connect the antenna and the circuit board.

[0016] Optionally, according to one embodiment of the present disclosure, the second intermediate electrical device includes a second inductor or capacitor and a second switch connected to each other.

[0017] Optionally, according to one embodiment of this disclosure, the antenna signal feeding device includes a metal spring.

[0018] Optionally, according to one embodiment of this disclosure, the antenna extension further includes a second network-type antenna.

[0019] Alternatively, according to one embodiment of this disclosure, the antenna and / or the antenna extendedly configured as a metal frame structure, an LDS, or an FPC structure.

[0020] Optionally, according to one embodiment of this disclosure, the satellite antenna signal feed device and the first network standard antenna signal feed device are either independent components or the same component.

[0021] Optionally, according to one embodiment of the present disclosure, the mobile terminal antenna system further includes a fourth filtering circuit, which is connected between the antenna and the second intermediate electrical device.

[0022] Optionally, according to one embodiment of this disclosure, the mobile terminal antenna system further includes a third network antenna, which is coupled to the circuit board for transmitting and receiving signals, and the third network antenna is extended from and spaced apart from the antenna.

[0023] According to another aspect of this disclosure, a mobile terminal is provided, wherein it includes any of the mobile terminal antenna systems described above.

[0024] Optionally, according to one embodiment of the present disclosure, the mobile terminal includes a circuit board with a reference ground, the antenna is coupled to the circuit board for transmitting and receiving signals, the first intermediate electrical device is connected between the circuit board and the antenna extension ground, the antenna extension ground is spaced apart from the circuit board and the antenna, such that the antenna extension ground increases the length of the reference ground.

[0025] The mobile terminal antenna system and mobile terminal provided in this disclosure embodiment at least partially realize one or more of the following technical advancements:

[0026] 1) Without changing the appearance, it can share the radiator and reference ground with network antennas, ensuring an aesthetically pleasing appearance;

[0027] 2) By extending the reference ground of the satellite antenna, the requirements for supporting satellite communication signals were met. At the same time, it did not affect conventional network antennas. Attached Figure Description

[0028] Referring to the accompanying drawings, the above and other features of this disclosure will become apparent, wherein,

[0029] Figure 1 A schematic diagram of the overall structure of a mobile terminal antenna system according to an embodiment of the present disclosure is shown;

[0030] Figure 2 A schematic diagram of a signal feeding device according to an embodiment of the present disclosure is shown;

[0031] Figure 3 A schematic diagram showing a design in which a satellite antenna signal feed device and a network antenna signal feed device are separated according to an embodiment of the present disclosure;

[0032] Figure 4 A schematic diagram of a design combining a satellite antenna signal feeder and a network antenna signal feeder according to an embodiment of the present disclosure is shown.

[0033] Figure 5A connection diagram of a satellite communication antenna and a network standard antenna combined according to an embodiment of the present disclosure is shown.

[0034] Figure 6 This diagram illustrates the connection relationship between a satellite communication antenna and a network standard antenna, according to an embodiment of the present disclosure.

[0035] Figure 7 A schematic diagram of a combined intermediate electrical device and network antenna signal feed device according to an embodiment of the present disclosure is shown.

[0036] Figure 8 A schematic diagram showing the connection of an intermediate electrical device and a network antenna signal feed device combined according to an embodiment of the present disclosure is provided.

[0037] Figure 9 A schematic diagram showing the connection of an intermediate electrical device and a network antenna signal feed device designed separately according to an embodiment of the present disclosure is provided.

[0038] Figure 10 A schematic diagram showing the connection of an intermediate electrical device and a satellite antenna signal feed device combined according to an embodiment of the present disclosure is provided; and

[0039] Figure 11 This diagram illustrates a comparative analysis of the radiation efficiency of a satellite communication antenna with and without components loaded at the intermediate electrical component, according to an embodiment of the present disclosure. Detailed Implementation

[0040] It is readily understood that, based on the technical solutions of this disclosure, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this disclosure. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solutions of this disclosure and should not be considered as the entirety of this disclosure or as limitations or restrictions on the technical solutions of this disclosure.

[0041] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," "third," and similar expressions are used for descriptive and distinguishing purposes only and should not be construed as indicating or implying the relative importance of the corresponding components.

[0042] In the embodiments of this disclosure, the described C is connected between A and B. This connection can be either a direct connection between C and A or B, or a connection between C and at least one of A and B separated by other devices. Regardless of the connection method, as long as electrical signal coupling is achieved, the connection described in the embodiments of this disclosure is satisfied.

[0043] In the embodiments of this disclosure, satellite communication encompasses any form of signal interaction between a mobile terminal and a satellite. For example, such communication can be data communication, such as providing services like internet access or VoIP via broadband or narrowband data; it can be message communication, such as sending and receiving SMS messages or text messages; or it can be location communication, such as a mobile terminal receiving location services from a satellite.

[0044] In embodiments of this disclosure, the term "antenna with XX communication function" is intended to mean that the antenna is designed and constructed to support the signal frequency of the corresponding XX communication.

[0045] Satellite communication terminals are primarily used in specific scenarios, such as at sea and in forests where there are no base station signals. When users are in these locations, ordinary consumer mobile terminals cannot communicate normally. Especially in areas with virtually no terrestrial network signal, users carrying mobile terminals cannot use their communication functions due to the lack of mobile communication signal. Walkie-talkies also face functional limitations, causing significant disruption to communication. Consequently, smartphones / mobile terminals are often tied to a single type of internet access, only able to communicate or perform data services when in a network-covered environment, thus limiting user scope and causing inconvenience. Satellite communication-enabled mobile terminals, however, can utilize satellites for normal communication. Currently, satellite phone terminals and base station-connected mobile terminals are separate devices, not integrated. Users need to carry multiple mobile terminals with different functions in different scenarios, consuming significant space and incurring high costs.

[0046] In the embodiments of this disclosure, satellite communication refers to the communication of data signals between a mobile terminal and a satellite in orbit, either directly or via a relay satellite, within a specific frequency band. Various frequency bands exist for satellite communication, such as low-frequency satellite communication in the 230 MHz to 283 MHz band.

[0047] refer to Figure 1 The diagram shows an overall structural schematic of a mobile terminal antenna system according to an embodiment of the present disclosure.

[0048] In some embodiments of this disclosure, the mobile terminal antenna system 1 includes an antenna 11 supporting satellite communication signal frequency bands, a first intermediate electrical device 13, and an antenna extension ground 14 with a satellite antenna extension ground. The antenna 11 is coupled to a circuit board 12 of the mobile terminal with a reference ground for signal transmission and reception. The first intermediate electrical device 13 is connected between the circuit board 12 and the antenna extension ground 14. The antenna extension ground 14 is spaced apart from the circuit board 12 and the antenna 11, such that the antenna extension ground 14 can increase the length of the reference ground.

[0049] It should be understood that "reference ground" and its length are industry terms used by those skilled in the art. The length of the original reference ground refers to the length of the circuit board 12 (e.g., the length of the long side of a rectangular circuit board). It should also be understood that the circuit board refers to the motherboard of a mobile terminal that carries the SoC or power supply devices. For example, in the case of a mobile phone, the circuit board is the PCB that carries most of the mobile phone's electrical components. When this technical solution is applied, the circuit board 12, the first intermediate electrical device 13, and the antenna extension ground 14 together constitute a new reference ground. The length of the new reference ground is the length of the circuit board 12, plus the distance between the circuit board 12 (its upper end in the figure) and the antenna extension ground 14, plus the length of the antenna extension ground 14 itself. Thus, this technical solution can be suitable for satellite antennas with longer wavelengths and lower frequencies. In addition, as will be described below, the performance of the entire antenna system for satellite antennas can be changed or improved by coordinating the selection of the first intermediate electrical device 13. In some embodiments, the circuit board 12 may also be part of the mobile terminal antenna system 1.

[0050] It should be understood that, from the perspective of mobile terminals supporting satellite communication functions, circuit board 12 can also be regarded as a functional component of the mobile terminal antenna system in a broad sense.

[0051] The above technical solution endows the mobile terminal with satellite communication capabilities. The length of the reference ground is increased, thereby improving the performance of the satellite antenna. There can be one or more antennas 11, and their shape and arrangement can be flexibly designed. The distance between the antenna extension ground 14 and the antenna 11 relative to the circuit board 12 can also be adjusted according to the mobile terminal's structure, size design, and the desired transmission effect. It should be understood that the term "coupling" as used herein should be interpreted broadly and extensively, encompassing both connected and disconnected situations, as long as the relevant components involved in the coupling have an interactive relationship.

[0052] For example, the antenna 11 and / or the antenna extension ground 14 can be constructed as a metal frame structure, an LDS (Laser Direct Structuring) structure, or an FPC (Flexible Printed Circuit) structure. LDS refers to Laser Direct Structuring, which projects a laser beam onto a substrate to be shaped in a controlled manner to activate (e.g., through chemical plating) a structural pattern. Simply put (for mobile phone antenna design and production), this laser engraving technology allows the antenna or extension ground to be directly laser-engraved onto the mobile terminal. The advantages of this structure include: stable product performance, good consistency, and high precision; the laser system used is durable, requires minimal maintenance, is suitable for continuous 24 / 7 production, and has a low failure rate; the manufacturing process is short, requiring no structural pattern molds, making it environmentally friendly; it avoids interference from internal components of the mobile terminal, ensuring its own signal strength; and it enhances the space utilization of the mobile terminal, allowing for a relatively thinner body.

[0053] FPC stands for Flexible Printed Circuit, a structure characterized by high reliability and flexibility. Furthermore, it features high wiring density, light weight, thinness, and good bendability. Copper can be used, for example, to fabricate the FPC structure.

[0054] Similarly, antennas or extensions in the form of metal frames can make full use of the inherent structural properties of the mobile terminal itself (e.g., using the metal frame of the mobile terminal itself, or adding a metal frame to the mobile terminal without affecting the electronic feel of the mobile terminal itself). Therefore, this design will not affect the appearance of the mobile terminal, and can also maintain the original protective and supporting function of the metal frame, without affecting the design flexibility of the mobile terminal or the function of its internal components.

[0055] In some embodiments, the antenna 11 is positioned at the lower left of the entire system (viewed from the front of the system) and extends in an L-shape from the left to the bottom left, so that the antenna 11 can have a large communication range and conform to the form of the metal frame. The antenna extension 14 is positioned at the top of the system in a straight line, which provides sufficient space for the placement of other antennas without affecting its extension effect to the reference ground.

[0056] Other antennas or extensions mentioned below can also be designed in a similar manner to antenna 11, and will not be described in detail thereafter. Antenna 11 can also be modified by referring to the design of other antennas or extensions.

[0057] In some embodiments, the antenna 11 includes a satellite communication antenna and a first network standard antenna. That is, the antenna 11 not only has satellite communication capabilities but can also have traditional network standard communication capabilities, such as cellular networks (2G, 3G, 4G, 5G), or Wi-Fi, Bluetooth, UWB (Ultra-Wideband), etc. Therefore, even if the mobile terminal itself does not have a network standard antenna, the antenna 11 of this system can still achieve satellite and traditional network standard, such as cellular communication, functions. Of course, depending on the actual situation or needs of the mobile terminal, the antenna 11 can also be only a satellite communication antenna. Those skilled in the art should understand that, depending on the configuration of the antenna 11 or the antenna and reference ground of the entire mobile terminal, the antenna extension ground 14 may also include a second network standard antenna.

[0058] This antenna system may further include a third network antenna 22, which can be coupled to the circuit board 12 for signal transmission and reception, and is spaced apart from the antenna extension ground 14 and the antenna 11. That is, this antenna system can also be used in conjunction with various separately arranged network antennas. The number of third network antennas 22 can be one or more; in the case of multiple antennas, they can be disconnected from each other to ensure their independence. There are no particular requirements for the specific arrangement or shape; those skilled in the art can flexibly and adaptably design the number, position, and shape of the network antennas according to actual requirements or circumstances (such as the shape of the mobile terminal or the design flexibility of the mobile terminal).

[0059] Regarding the first intermediate electrical device 13, it is feasible for it to include a first inductor 131 or a first switch 132 for opening and / or switching the antenna path. It should be understood that these two design approaches can be used simultaneously, i.e., the switch and inductor can be used in combination. The inductor can be considered as a low-pass filter, suitable for filtering satellite communication antennas. Those skilled in the art are familiar with the basic structure of a switch. For example, the first switch may have multiple channels or pins, one or more of which can be assigned to an antenna, and different channels can be switched as needed. The first switch can also switch between a reference ground and an extended ground for different operating conditions. The first switch may, for example, include a single-pole four-throw switch. The inductor can be located at one of the channels for debugging and / or filtering the channel and the antenna assigned to that channel. By adjusting the value of the first inductor 131, the S11 of the antenna 11 (which requires the circuit to operate in an impedance-matched state for effective signal and energy transmission; the degree of matching is described by S11) is within the TX (transmitting part) and RX (receiving part) range of the corresponding satellite communication antenna section. This determines the inductance value of the first inductor 131, thereby optimizing the performance of the satellite antenna. Although not explicitly mentioned in this paper, the inductor can be replaced or supplemented with other components (capacitors, resistors, etc.), and the values ​​of these other components can be determined in a similar manner. In some cases, these components can even be omitted altogether.

[0060] refer to Figure 2 This diagram illustrates a design schematic of a signal feeding device according to an embodiment of the present disclosure. The mobile terminal antenna system 1 further includes an antenna signal feeding device 16, which can be mounted on the circuit board 12 and connected to the antenna 11. It should be understood that the antenna signal feeding device 16 serves as a signal feed point for transmitting electrical signals to the antenna. The antenna signal feeding device 16 may include a metal spring to provide a rebound force, thereby ensuring reliable contact with the antenna. Specific metal choices are varied; for example, copper can be selected to reduce costs while simultaneously meeting the requirements for electrical signal transfer.

[0061] refer to Figure 3 and Figure 4 The figures show schematic diagrams illustrating separate and combined designs of a satellite antenna signal feeder and a network antenna signal feeder, according to embodiments of the present disclosure. Arrows schematically indicate the respective feeder devices. The arrangement of the various feeder devices can be set according to actual needs, for example, all arranged on the same side of the circuit board. In these different configurations, the desired antenna can be connected through corresponding circuit designs.

[0062] In some embodiments, the antenna supporting the satellite communication signal frequency band and the first network standard antenna share a common radiator. That is, the antenna 11 employs a fusion scheme of a satellite communication antenna and a network standard antenna, for example, referring to... Figure 5 The two circuits converge at a single point before the antenna and are then connected to the fused antenna. Satellite communication antennas and network-specific antennas can also be designed separately, i.e., using individual radiators, as shown in the reference... Figure 6 The two circuits are connected to the fused antenna respectively. It should be noted that, even when designed separately, this type of antenna is still called a fused antenna. That is to say, fusion here means that antenna 11 has both satellite and traditional network communication functions, which can be used together. Physically, it can be set up together (shared radiator) or set up separately (individual radiator).

[0063] To improve communication quality, the mobile terminal antenna system 1 may further include a first filtering circuit 15, which is connected between the antenna 11 and the circuit board 12, for example, between a corresponding signal feed device and the antenna 11. Specifically, a filtering inductor 151 and / or a filtering capacitor 152 may be used as the first filtering circuit 15 or a part thereof. As mentioned above, an inductor can be considered as a low-pass filter, while a capacitor can be considered as a high-pass filter, applicable to network standards, such as cellular antennas. When the antenna 11 adopts a fused antenna design, the first filtering circuit, with a suitable design, corresponds to a specific part of the antenna 11 to achieve the corresponding filtering effect. For example, as shown in the figure, the antenna signal feed device 16 includes a satellite antenna signal feed device 161 and a first network standard antenna signal feed device 162. They can be connected to the filtering inductor 151 and the filtering capacitor 152 at the left end, respectively, and both are connected to the circuit board 12 at the right end, and their positions can be flexibly arranged according to the shape of the mobile terminal. As mentioned above, the satellite antenna signal feed device 161 and the first network antenna signal feed device 162 can be independent components or the same component. Therefore, when the first network antenna is operating, the first filter circuit can eliminate the influence of the satellite antenna. When the satellite communication antenna is operating, the first filter circuit can eliminate the influence of the network antenna. Thus, the mutual influence between the satellite communication antenna and the network antenna can be eliminated overall, achieving a shared purpose.

[0064] refer to Figure 7 and Figure 8 The diagrams show a structural schematic and a connection schematic of an intermediate electrical device and a network antenna signal feed device combined according to an embodiment of the present disclosure.

[0065] The mobile terminal antenna system 1 further includes a second network-standard antenna signal feed device 17 and a second filtering and / or switching circuit 18 connected to each other. The second network-standard antenna signal feed device 17 and the second filtering and / or switching circuit 18 are connected between the circuit board 12 and the antenna extension ground 14. Thus, this design provides one implementation of the system when used in conjunction with a separate network-standard antenna. The second network-standard antenna signal feed device 17 is arranged next to the first intermediate electrical component, making good use of the structural gap between them. Similarly, the mobile terminal antenna system 1 may also include a third filtering and / or switching circuit 19, which is connected between the first intermediate electrical component 13 and the antenna extension ground 14. The specific values ​​(such as inductance and capacitance values) of the various filtering circuits mentioned herein do not need to be the same and can be flexibly selected according to the specific arrangement and filtering object. The two-in-one design here is reflected in the fact that the circuit containing the first intermediate electrical component and the circuit containing the second network-standard antenna signal feed device converge at a point and are connected to the extension ground. In some embodiments, the two circuits described above can also be directly connected to an extension ground (e.g., Figure 9 It should be understood that, in cases where the relevant circuit involves a switch, the circuit can be switched on or off as needed.

[0066] refer to Figure 10 The diagram shows a connection schematic of an intermediate electrical device and a satellite antenna signal feed device combined according to an embodiment of the present disclosure.

[0067] The mobile terminal antenna system 1 further includes a second intermediate electrical component 21, which is used to connect the antenna 11 and the circuit board 12, thereby saving structural space. The specific implementation of the second intermediate electrical component 21 can be designed with reference to the first intermediate electrical component 13. For example, it may include a second inductor or capacitor 211 and a second switch 212 connected to each other. The second inductor or capacitor 211 is mainly used for network-based antennas, such as cellular antennas, and the specific selection can be determined according to the debugging requirements of the network-based system. Similarly, the mobile terminal antenna system 1 also includes a fourth filter circuit 20, which is connected between the antenna 11 and the second intermediate electrical component 21. This filter circuit can use an inductor. Here, "two-in-one" means that the circuit containing the second intermediate electrical component 21 and the circuit containing the satellite antenna signal feed device 161 converge at a single point and are connected to the satellite antenna portion of the antenna 11.

[0068] refer to Figure 11This diagram illustrates a comparative analysis of the radiation efficiency of a satellite communication antenna with and without the addition of components at the intermediate electrical device, according to an embodiment of the present disclosure. The diagram shows simulation data. The radiation efficiency in the original state is the result without any satellite antenna extension processing. As can be seen from the diagram, the first intermediate electrical device 13, with a 104 nH inductor and corresponding radiation efficiency, shows an improvement of approximately 10 dB compared to the original state.

[0069] It should be noted that the 104 nH loading S11 is the result measured by the satellite antenna signal feed device 161 after loading a 104 nH inductor into the first intermediate electrical device 13. The appropriateness of the inductance loading in the first intermediate electrical device 13 is determined based on the S11 result.

[0070] According to another aspect of this disclosure, a mobile terminal is also disclosed, which includes any of the aforementioned mobile terminal antenna systems 1. Therefore, for details regarding the specific implementation and features of this mobile terminal, please refer to the above description of the antenna system.

[0071] For example, the mobile terminal includes a circuit board with a reference ground, the antenna is coupled to the circuit board for transmitting and receiving signals, the first intermediate electrical device is connected between the circuit board and the antenna extension ground, the antenna extension ground is spaced apart from the circuit board and the antenna, such that the antenna extension ground increases the length of the reference ground.

[0072] It should be mentioned that the mobile terminal can be any device that supports satellite communication, including mobile phones, tablets, laptops, in-vehicle communication terminals, or smart glasses. The in-vehicle communication terminal can be standalone or integrated into vehicle systems such as ECUs and TCUs; and the smart glasses include AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), and XR (Extended Reality) smart glasses.

[0073] It should be understood that all the above preferred embodiments are exemplary and not restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of this disclosure should be within the legal protection scope of this disclosure.

Claims

1. A mobile terminal antenna system, characterized in that, It includes an antenna supporting satellite communication signal frequency bands, a first intermediate electrical component, and an antenna extension ground with satellite antenna extension ground. The antenna can be coupled to a circuit board with a reference ground of a mobile terminal for signal transmission and reception. The first intermediate electrical component is used to connect between the circuit board and the antenna extension ground. The antenna extension ground is spaced apart from the circuit board and the antenna, so that the antenna extension ground can increase the length of the reference ground. The mobile terminal antenna system also includes a second network standard antenna signal feed device and a second filtering and / or switching circuit connected to each other. The second network standard antenna signal feed device and the second filtering and / or switching circuit are used to connect between the circuit board and the antenna extension ground. The second network standard antenna signal feed device is arranged next to the first intermediate electrical component. The circuit containing the first intermediate electrical component and the circuit containing the second network standard antenna signal feed device converge at a point and are connected to the antenna extension ground.

2. The mobile terminal antenna system according to claim 1, characterized in that, The first intermediate electrical component includes a first inductor.

3. The mobile terminal antenna system according to claim 1, characterized in that, The first intermediate electrical device includes a first switch for opening and / or switching the antenna path.

4. The mobile terminal antenna system according to claim 1, characterized in that, The antenna includes a satellite communication antenna and a first network standard antenna.

5. The mobile terminal antenna system according to claim 4, characterized in that, The antenna supporting satellite communication signal frequency bands and the first network standard antenna share a common radiator.

6. The mobile terminal antenna system according to claim 4 or 5, characterized in that, It also includes a first filtering circuit, which is used to connect between the antenna and the circuit board.

7. The mobile terminal antenna system according to claim 6, characterized in that, The first filter circuit includes a filter inductor and / or a filter capacitor.

8. The mobile terminal antenna system according to any one of claims 1 to 5, characterized in that, It also includes an antenna signal feed device, which can be mounted on the circuit board and connected to the antenna.

9. The mobile terminal antenna system according to claim 8, characterized in that, The antenna signal feeding device includes a satellite antenna signal feeding device and a first network standard antenna signal feeding device.

10. The mobile terminal antenna system according to claim 1, characterized in that, It also includes a third filtering and / or switching circuit, which is connected between the first intermediate electrical device and the antenna extension ground.

11. The mobile terminal antenna system according to any one of claims 1 to 5, characterized in that, It also includes a second intermediate electrical component, which is used to connect the antenna and the circuit board.

12. The mobile terminal antenna system according to claim 11, characterized in that, The second intermediate electrical device includes a second inductor or capacitor connected to each other and a second switch.

13. The mobile terminal antenna system according to claim 8, characterized in that, The antenna signal feeding device includes a metal spring.

14. The mobile terminal antenna system according to any one of claims 1 to 5, characterized in that, The antenna extension also includes a second network-type antenna.

15. The mobile terminal antenna system according to any one of claims 1 to 5, characterized in that, The antenna and / or the antenna extendedly configured as a metal frame structure, LDS, or FPC structure.

16. The mobile terminal antenna system according to claim 9, characterized in that, The satellite antenna signal feed device and the first network antenna signal feed device are either independent components or the same component.

17. The mobile terminal antenna system according to claim 11, characterized in that, It also includes a fourth filtering circuit, which is connected between the antenna and the second intermediate electrical device.

18. The mobile terminal antenna system according to any one of claims 1 to 5, characterized in that, It also includes a third network antenna, which can be coupled to the circuit board for signal transmission and reception, and the third network antenna is extended from and spaced apart from the antenna.

19. A mobile terminal, characterized in that, It includes a mobile terminal antenna system according to any one of claims 1 to 18.

20. The mobile terminal according to claim 19, characterized in that, It includes a circuit board with a reference ground, an antenna coupled to the circuit board for transmitting and receiving signals, a first intermediate electrical device connected between the circuit board and the antenna extension ground, the antenna extension ground being spaced apart from the circuit board and the antenna, such that the antenna extension ground increases the length of the reference ground.

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