A mobile terminal

Abstract

The application provides a mobile terminal, which comprises three housings and an antenna system connected in turn. The antenna system comprises a satellite antenna, the satellite antenna comprising a satellite radio frequency link, a first radiator, a second radiator, a third radiator, a first tuning circuit and a second tuning circuit, the satellite radio frequency link being coupled with the third radiator. The first radiator, the second radiator and the third radiator are arranged in different housings respectively, and the three radiators are located at one end of the mobile terminal. The first radiator is coupled with the first tuning circuit, and the second radiator is coupled with the second tuning circuit. By using the above scheme, when the satellite antenna is in a working state, the first radiator and the first tuning circuit, the second radiator and the second tuning circuit and the third radiator can be used to generate a target directional diagram of the satellite antenna, which is beneficial to the optimization of the directional diagram of the satellite antenna and / or the gain of the satellite antenna, so that the communication performance of the satellite antenna can be improved.

Description

[0001] This application is a divisional application. The original application has the application number 202410981902.1 and the original application date is July 19, 2024. The entire contents of the original application are incorporated herein by reference.

[0002] This application claims priority to Chinese Patent Application No. 202410555767.4, filed on May 7, 2024, entitled "A Folding Terminal Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and in particular to a mobile terminal. Background Technology

[0004] With the development of human society, mobile devices such as smartphones have become indispensable tools in people's lives. People's reliance on mobile devices has impacted all aspects of their lives. With the rise of technology that uses communication satellites to achieve communication via mobile devices, people's practical demand for satellite communication via mobile devices is increasing.

[0005] To achieve communication via satellite, a communication connection must first be established between the mobile terminal's satellite antenna and the communication satellite. The radiation pattern of the satellite antenna is one of the factors affecting the communication connection speed and stability. Different mobile terminal forms, such as candybar and foldable terminals, and foldable terminals in different folding configurations, typically have different floor dimensions, and these different floor dimensions have varying impacts on the radiation pattern. Therefore, by analyzing the radiation patterns of satellite antennas for mobile terminals with different floor dimensions, the design of the satellite antenna can be optimized to improve the satellite communication performance of the mobile terminal. Summary of the Invention

[0006] This application provides a mobile terminal for improving the satellite communication performance of the mobile terminal.

[0007] The mobile terminal provided in this application includes a first housing, a second housing, a third housing, a first rotating shaft mechanism, a second rotating shaft mechanism, and an antenna system. The first housing and the second housing are rotatably connected via the first rotating shaft mechanism, and the second housing and the third housing are rotatably connected via the second rotating shaft mechanism. The antenna system includes a satellite antenna, which includes a satellite radio frequency link, a first radiator, a second radiator, a third radiator, a first tuning circuit, and a second tuning circuit. The first radiator is coupled to the first tuning circuit, the second radiator is coupled to the second tuning circuit, and the third radiator is coupled to the satellite radio frequency link. Furthermore, the first radiator, the second radiator, and the third radiator are respectively disposed in different housings. Along the axial direction of the mobile terminal, the first radiator, the second radiator, and the third radiator are located at one end of the mobile terminal. Based on this, in the antenna system of the mobile terminal provided in this application, when the satellite antenna is in working state, the first radiator, the first tuning circuit, the second radiator, the second tuning circuit, and the third radiator are used to jointly generate the target radiation pattern of the satellite antenna. This allows the first tuning circuit to form a resonant structure with the first radiator, and the second tuning circuit to form another resonant structure with the second radiator. The two resonant structures can then influence the resonant mode of the third radiator, thereby adjusting the target radiation pattern of the satellite antenna and / or increasing its gain, thus improving the communication performance of the satellite antenna.

[0008] Using the antenna system design scheme provided in this application, the first radiator can be connected to the corresponding branch of the first tuning circuit and the second radiator can be connected to the corresponding branch of the second tuning circuit according to the folded state of the mobile terminal, so that the resonant structure formed by the first radiator through the first tuning circuit and the resonant structure formed by the second radiator through the second tuning circuit can affect the resonant mode of the resonance generated by the third radiator.

[0009] Specifically, when the mobile terminal is in a flattened state and the third radiator is disposed in the second housing, if the satellite antenna is in operation, the first radiator is coupled to the ground through a branch of the first tuning circuit and is used to generate a first resonance. The second radiator is coupled to the ground through a branch of the second tuning circuit to form a first resonant structure, which corresponds to a first frequency. Additionally, the third radiator is used to generate a third resonance. The first frequency and the resonant point frequency of the third resonance are within the first communication frequency band of the satellite antenna, while the second frequency is higher than the first communication frequency band. This coupling between the first and third radiators allows the current in the third radiator to flow towards the first radiator and then to the ground, thus suppressing the current in the third radiator and causing the radiation pattern of the satellite antenna to tilt towards one side of the third housing. Furthermore, the coupling between the second and third radiators allows more of the resonant current generated by the third radiator to flow towards the second radiator and then towards the ground. In its flat state, the mobile terminal has a larger floor size, which allows the current on the floor to flow in a traveling wave pattern along the frame and floor direction to generate an orthogonal polarized radiation field. This enhances the circular polarization gain of the satellite antenna, which in turn increases the beamwidth of the radiation pattern to meet the satellite antenna's alignment requirements and improves the communication performance of the satellite antenna.

[0010] In practical applications, when the mobile terminal is in a flattened state and the third radiator is disposed in the second housing, if the satellite antenna is in operation, the first radiator is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, corresponding to a first frequency. The second radiator is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, corresponding to a second frequency. The third radiator is used to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance can satisfy: f13 ≤ 10%. f3 is used to suppress the current in the third radiator through coupling between the first and third radiators. Additionally, the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance can satisfy: f23 > 10%. f3, thereby generating an orthogonally polarized radiation field between the ground current and the current between the second and third radiators through the coupling between the second and third radiators, thus improving the circular polarization gain of the satellite antenna.

[0011] In one possible implementation, the frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: 0 ≤ f13 ≤ 100MHz. Additionally, the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 100MHz.

[0012] In another possible implementation of this application, when the mobile terminal is in a flattened state and the third radiator is disposed on the second housing, if the satellite antenna is in operation, the first radiator is coupled to the ground plane through a branch of the first tuning circuit and is used to generate a first resonance. The second radiator is coupled to the ground plane through a branch of the second tuning circuit to form a first resonant structure, which corresponds to a first frequency. Additionally, the third radiator is used to generate a third resonance. The resonant frequency of the third resonance is within the first communication frequency band of the satellite antenna, with the first frequency and the second frequency both higher than the first communication frequency band. This allows the orthogonally polarized radiation field generated by the ground plane and the frame radiators to enhance the circular polarization gain of the satellite antenna, thereby improving its communication performance.

[0013] In practical applications, when the mobile terminal is in a flattened state and the third radiator is disposed in the second housing, if the satellite antenna is in operation, the first radiator is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, corresponding to a first frequency. The second radiator is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, corresponding to a second frequency. The third radiator is used to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: f13 > 10%. f3, through the coupling between the first and third radiators, generates an orthogonally polarized radiation field between the ground current and the current between the first and third radiators, thereby enhancing the circular polarization gain of the satellite antenna. Furthermore, the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3, through the coupling between the second and third radiators, generates an orthogonal polarized radiation field between the ground current and the first and third radiators, thereby enhancing the circular polarization gain of the satellite antenna.

[0014] In one possible implementation, the frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: f13 > 100MHz; the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 100MHz.

[0015] In another possible implementation of this application, when the mobile terminal is in a flattened state, and the first radiator is disposed in the first housing, the second radiator in the second housing, and the third radiator in the third housing, if the satellite antenna is in operation, the first radiator can be coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency; the second radiator can be coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. Additionally, the third radiator is used to generate a third resonance. The resonant frequency of the third resonance is within the first communication frequency band of the satellite antenna, with the first frequency and the second frequency both higher than the first communication frequency band. This allows both the first resonant structure formed by the first radiator through the first tuning circuit and the second resonant structure formed by the second radiator through the second tuning circuit to significantly influence the resonant mode of the resonance generated by the third radiator, thereby adjusting the radiation pattern and circular polarization gain of the satellite antenna and improving its communication performance.

[0016] In practical applications, when the mobile terminal is in a flattened state, and the first radiator is disposed in the first housing, the second radiator in the second housing, and the third radiator in the third housing, if the satellite antenna is in operation, the first radiator can be coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, corresponding to a first frequency; the second radiator can be coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, corresponding to a second frequency. Additionally, the third radiator is used to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: f13 > 10%. f3 is used to generate orthogonally polarized radiation fields between the currents of the first and third radiators and the ground current, thereby enhancing the circular polarization gain of the satellite antenna. The frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3, so that the circuit between the second and third radiators and the ground current generate an orthogonally polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna.

[0017] In one possible implementation, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: f13 > 100MHz. Additionally, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23 > 100MHz.

[0018] In one possible embodiment of this application, when the mobile terminal is in a flattened state, and the first radiator is disposed in the first housing, the second radiator is disposed in the second housing, and the third radiator is disposed in the third housing, if the satellite antenna is in an operational state, the first radiator is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator is used to generate a third resonance, wherein the first frequency and the resonant point frequency of the third resonance are within the first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band. This allows for the adjustment of the maximum radiation direction of the satellite antenna's radiation pattern while simultaneously increasing the circular polarization gain of the satellite antenna.

[0019] In practical applications, when the mobile terminal is in a flattened state, and the first radiator is disposed in the first housing, the second radiator in the second housing, and the third radiator in the third housing, if the satellite antenna is in operation, the first radiator can be coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, corresponding to a first frequency; the second radiator can be coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, corresponding to a second frequency. Additionally, the third radiator is used to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: f13 ≤ 10%. f3, through the coupling between the first and third radiators, suppresses the current in the third radiator, thereby adjusting the maximum radiation direction of the radiation pattern. The frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3, through the coupling between the second and third radiators, generates an orthogonally polarized radiation field between the ground current and the current between the second and third radiators, thereby enhancing the circular polarization gain of the satellite antenna.

[0020] In one possible implementation, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: 0 ≤ f13 ≤ 100MHz. Additionally, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23 > 100MHz.

[0021] In the mobile terminal provided in this application, the first housing includes a first support surface for supporting a flexible display screen, the second housing includes a second support surface for supporting a flexible display screen, and the third housing includes a third support surface for supporting a flexible display screen. When the first and second support surfaces are coplanar, the third support surface intersects with the second support surface, and the third radiator is disposed on the second housing, i.e., when the mobile terminal is in a hovering state, if the satellite antenna is in working condition, the first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency; the second radiator is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency; the third radiator is used to generate a sixth resonance, wherein the resonant frequencies of the fifth and sixth resonances are within the second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band. When the mobile terminal is in this hovering state, because its ground plane is relatively large, and the current of the satellite antenna can be vertically distributed on the ground plane, thereby achieving circular polarization, it is beneficial to improving the performance of the satellite antenna.

[0022] In practical applications, the first housing includes a first support surface for supporting the flexible display screen, the second housing includes a second support surface for supporting the flexible display screen, and the third housing includes a third support surface for supporting the flexible display screen. When the first and second support surfaces are coplanar, the third support surface intersects with the second support surface, and the third radiator is disposed in the second housing, i.e., when the mobile terminal is in a hovering state, if the satellite antenna is in working condition, the first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency; the second radiator is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency; the third radiator is used to generate a sixth resonance, wherein the frequency difference f46 between the resonant frequency f4 of the fourth resonance and the resonant frequency f6 of the sixth resonance satisfies: f46 > 10%. f6 is used to generate an orthogonally polarized radiation field between the ground current and the current between the first and third radiators through coupling between the first and third radiators, thereby enhancing the circular polarization gain of the satellite antenna. Furthermore, the frequency difference f56 between the resonant frequencies f5 and f6 of the fifth and sixth resonators satisfies: f56 ≤ 10%. f3, through the coupling between the second and third radiators, suppresses the current in the third radiator, thereby adjusting the maximum radiation direction of the radiation pattern.

[0023] In one possible implementation, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance can satisfy: f46 > 100MHz. Additionally, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance can satisfy: 0 ≤ f56 ≤ 100MHz.

[0024] In another possible implementation of this application, the mobile terminal provided in this application includes a first housing comprising a first support surface for supporting a flexible display screen, a second housing comprising a second support surface for supporting a flexible display screen, and a third housing comprising a third support surface for supporting a flexible display screen. When the first and second support surfaces are coplanar, the third support surface intersects with the second support surface, and a first radiator is disposed in the first housing, a second radiator is disposed in the second housing, and a third radiator is disposed in the second housing, the satellite antenna is in a working state. The first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponding to a fourth frequency; the second radiator is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponding to a fifth frequency; the third radiator is used to generate a sixth resonance, wherein the resonant point frequencies of the fifth and sixth resonances are within the second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band. When the mobile terminal is in this hovering state, due to its large ground plane size, and the fact that the current of the satellite antenna can be vertically distributed on the ground plane, thus achieving circular polarization, it is beneficial to improving the performance of the satellite antenna.

[0025] In practical applications, the first housing includes a first support surface for supporting the flexible display screen, the second housing includes a second support surface for supporting the flexible display screen, and the third housing includes a third support surface for supporting the flexible display screen. When the first and second support surfaces are coplanar, the third support surface intersects with the second support surface, and the first radiator is disposed in the first housing, the second radiator is disposed in the second housing, and the third radiator is disposed in the second housing, the satellite antenna is in a working state. The first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency; the second radiator is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency; the third radiator is used to generate a sixth resonance, wherein the frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46 > 10%. f6 is used to generate an orthogonally polarized radiation field between the ground current and the first and third radiators through coupling between the first and third radiators, thereby enhancing the circular polarization gain of the satellite antenna. Furthermore, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f6, through the coupling between the second and third radiators, suppresses the current in the third radiator, thereby adjusting the maximum radiation direction of the radiation pattern. This improves the circular polarization characteristics of the satellite antenna in hovering mode, thus enhancing the communication performance of the satellite antenna.

[0026] In one possible implementation, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance satisfies: f46 > 100MHz. Additionally, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 100MHz.

[0027] In one possible implementation of this application, the first housing includes a first support surface for supporting the flexible display screen, the second housing includes a second support surface for supporting the flexible display screen, and the third housing includes a third support surface for supporting the flexible display screen. When the first and second support surfaces are coplanar, the third support surface intersects with the second support surface, and the first radiator is disposed in the first housing, the second radiator is disposed in the second housing, and the third radiator is disposed in the second housing, the satellite antenna is in an operational state. The first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency; the second radiator is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency; the third radiator is used to generate a sixth resonance, wherein the resonant frequencies of the fourth, fifth, and sixth resonances are all within the second communication frequency band of the satellite antenna. This still allows the current of the satellite antenna to be vertically distributed on the ground plane, thereby achieving circular polarization, which is beneficial to improving the performance of the satellite antenna, and also allows for adjustment of the maximum radiation direction of the radiation pattern.

[0028] In practical applications, the first housing includes a first support surface for supporting the flexible display screen, the second housing includes a second support surface for supporting the flexible display screen, and the third housing includes a third support surface for supporting the flexible display screen. When the first and second support surfaces are coplanar, the third support surface intersects with the second support surface, and the first radiator is disposed in the first housing, the second radiator is disposed in the second housing, and the third radiator is disposed in the second housing, the satellite antenna is in a working state. The first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency; the second radiator is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency; the third radiator is used to generate a sixth resonance, wherein the frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46 ≤ 10%. f6. Furthermore, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f6. This still allows for the adjustment of the maximum radiation direction of the radiation pattern while achieving circular polarization and improving the performance of the satellite antenna.

[0029] In one possible implementation, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f46 ≤ 100 MHz. Additionally, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f56 ≤ 100 MHz.

[0030] When the mobile terminal is in the hovering state described above, the angle α between the third support surface and the second support surface satisfies: 45°≤α≤135°, for example, 60°≤α≤120° or 80°≤α≤100°. In practical applications, α can be made 90°.

[0031] In another possible implementation of this application, the first housing includes a first support surface for supporting the flexible display screen, the second housing includes a second support surface for supporting the flexible display screen, and the third housing includes a third support surface for supporting the flexible display screen. When the first and second support surfaces are coplanar and the third support surface is opposite to the second support surface, i.e., when the mobile terminal is in a folded state, if the satellite antenna is in operation, the first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a seventh resonant structure, which corresponds to a seventh frequency. The second radiator is coupled to the ground plane through another branch of the second tuning circuit to form an eighth resonant structure, which corresponds to an eighth frequency. The third radiator is used to generate a ninth resonance. The resonant frequency of the ninth resonance is within the third communication frequency band of the satellite antenna, the resonant frequency of the seventh resonance is higher than the third communication frequency band, and the resonant frequency of the eighth resonance is higher than the third communication frequency band. When the mobile terminal is in this folded state, the second radiator can act as a parasitic radiator of the third radiator. Since the current distribution excited by the first resonant structure formed by the first tuning circuit of the second radiator is similar to the current distribution excited by the ninth resonant generated by the third radiator, it can effectively reduce the decrease in the radiation efficiency of the satellite antenna caused by the folding of the third shell, so that the satellite antenna can still meet certain communication requirements.

[0032] Furthermore, when the mobile terminal is in the aforementioned folded state, the third radiator can be located in either the second housing, the third housing, or the first housing. In either case, the second radiator can serve as a parasitic radiator for the third radiator, thereby reducing the decrease in radiation efficiency of the satellite antenna caused by the folding of the third housing, thus ensuring that the satellite antenna can still meet certain communication requirements.

[0033] In practical applications, the first housing includes a first support surface for supporting the flexible display screen, the second housing includes a second support surface for supporting the flexible display screen, and the third housing includes a third support surface for supporting the flexible display screen. When the first and second support surfaces are coplanar and the third support surface is opposite to the second support surface, i.e., when the mobile terminal is in a folded state, if the satellite antenna is in working condition, the first radiator is coupled to the ground plane through another branch of the first tuning circuit to form a seventh resonant structure, corresponding to a seventh frequency. The second radiator is coupled to the ground plane through another branch of the second tuning circuit to form an eighth resonant structure, corresponding to an eighth frequency. The third radiator is used to generate a ninth resonance. The frequency difference f79 between the seventh frequency f7 and the resonant frequency f9 of the ninth resonance satisfies: f79 > 10%. f9 is used to generate an orthogonally polarized radiation field between the ground current and the current between the first and third radiators through coupling between the first and third radiators, thereby enhancing the circular polarization gain of the satellite antenna. Furthermore, the frequency difference f89 between the eighth frequency f8 and the resonant frequency f9 of the ninth resonance satisfies: f89 > 10%. f9, through the coupling between the second and third radiators, generates an orthogonally polarized radiation field between the ground current and the current between the first and third radiators, thereby enhancing the circular polarization gain of the satellite antenna. This reduces the decrease in radiation efficiency of the satellite antenna caused by the folding of the third housing, thus allowing the satellite antenna to still meet certain communication requirements.

[0034] Specifically, the frequency difference f79 between the seventh frequency f7 and the resonant frequency f9 of the ninth resonance satisfies: f79 > 100MHz. Furthermore, the frequency difference f89 between the eighth frequency f8 and the resonant frequency f9 of the ninth resonance satisfies: f89 > 100MHz.

[0035] In this application, the satellite antenna also includes a first feed point, through which the satellite radio frequency link can be coupled to the third radiator. When the first radiator is disposed in the first housing, the second radiator in the third housing, and the third radiator in the second housing, the distance between the first feed point and the axis of the first rotating shaft structure is greater than the distance between the first feed point and the axis of the second rotating shaft structure. This helps to enhance the radiation pattern of the satellite antenna towards the direction of the third housing, thereby obtaining the desired radiation pattern, which is beneficial to improving the radiation efficiency of the satellite antenna.

[0036] In one possible implementation of this application, the satellite antenna further includes a third switching component coupled to a third radiator. This allows switching between the transmitting and receiving states of the satellite antenna by changing the conduction state of the third switching component. For example, when the third switching component is in a first conducting state, the satellite antenna is in the transmitting state; and when the third switching component is in a second conducting state, the satellite antenna is in the receiving state.

[0037] Furthermore, when the satellite antenna is in transmit mode, the first radiator can be connected to the first branch of the first tuning circuit. When the satellite antenna is in receive mode, the first radiator can be connected to the second branch of the first tuning circuit. Thus, when the satellite antenna is in transmit and receive modes, the first radiator can be controlled accordingly through the corresponding branch of the first tuning circuit, thereby meeting the communication requirements of the satellite antenna while also enhancing the intelligence of the antenna system.

[0038] In another possible implementation of this application, when the satellite antenna is in transmitting or receiving mode, the first radiator can be connected to the same branch of the first tuning circuit. This not only meets the satellite communication requirements of the mobile terminal but also simplifies the antenna system.

[0039] As described above, the mobile terminal provided in this application has at least two folded states. For any two folded states, when the satellite antenna is in operation, the first radiator can be connected to different branches of the first tuning circuit, and the second radiator can be connected to different branches of the second tuning circuit. This ensures that the first frequency corresponding to the first resonant structure formed by the first radiator through the first tuning circuit and the second frequency corresponding to the second resonant structure formed by the second radiator through the second tuning circuit satisfy the relationship with the resonant frequency of the resonance generated by the third radiator, thereby improving the radiation efficiency of the satellite antenna when the mobile terminal is in each folded state.

[0040] In another possible implementation, when the mobile terminal is in different folded states and the satellite antenna is in an active state, the first radiator can be connected to the same branch of the first tuning circuit. For example, the first radiator can be connected to a branch that ensures its resonant frequency f satisfies 2500MHz ≤ f ≤ 2700MHz, so that the first radiator operates within the aforementioned fixed frequency band regardless of the mobile terminal's folded state. This satisfies the satellite communication requirements of the mobile terminal in different folded states while also simplifying the antenna system.

[0041] In this application, when the mobile terminal is in different folded states and the satellite antenna is in an active state, the first radiator is connected to the same branch of the first tuning circuit. This can be understood as the mobile terminal controlling the state of the first tuning circuit through a fixed operating frequency band radio frequency link when in different folded states. For example, the antenna system may also include a cellular radio frequency link, in which case the mobile terminal can control the state of the first tuning circuit through the cellular radio frequency link, so that the first tuning circuit controls the first radiator to operate within the aforementioned fixed operating frequency band.

[0042] In one possible implementation of this application, when the satellite antenna is in a non-operating state, the first radiator is coupled to the first antenna radio frequency link and used to generate a first resonance. The resonant frequency of the first resonance is within the communication frequency band of the first antenna. In practical applications, the first antenna radio frequency link can be a cellular radio frequency link. Therefore, when the satellite antenna is in a non-operating state, the first radiator is used as a radiator for the cellular antenna. When the satellite antenna is in an operating state, the first radiator can form a resonant structure with the first tuning circuit to influence the radiation pattern of the satellite antenna. It is understood that the frequency corresponding to the first resonant structure when the satellite antenna is in an operating state can be the same as the resonant frequency of the first resonance generated by the first radiator when the satellite antenna is in a non-operating state, thereby enabling the reuse of the cellular antenna and simplifying the antenna system.

[0043] In addition, in this application, the mobile terminal can control the state of the second tuning circuit through a cellular radio frequency link or a satellite link so that the second radiator generates a corresponding resonance.

[0044] In another possible implementation of this application, the antenna system further includes a cellular radio frequency link, and the first radiator includes a second feed point, with the cellular radio frequency link coupled to the second feed point. When the mobile terminal is in a closed state and the satellite antenna is in a non-operating state, the second radiator is used as the radiator of the cellular antenna. In this case, the resonant frequency of the third radiator can be greater than the resonant frequency of the first radiator, and the resonant frequency of the second radiator is greater than the resonant frequency of the first radiator. This allows both the second and third radiators to act as parasitic radiators of the first radiator, thereby improving the resonant efficiency of the first radiator and thus enhancing the cellular communication performance of the antenna system. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of a mobile terminal performing satellite communication in an embodiment of this application;

[0046] Figure 2 A schematic diagram of a mobile terminal in a flattened state, as provided in an embodiment of this application;

[0047] Figure 3A schematic diagram of a mobile terminal in a hovering state provided in an embodiment of this application;

[0048] Figure 4 A simplified schematic diagram of a mobile terminal in a flattened state provided in the embodiments of this application;

[0049] Figure 5a A schematic diagram of the antenna system distribution structure when the mobile terminal is in a flattened state, as provided in the embodiments of this application;

[0050] Figure 5b A schematic diagram of another antenna system distribution structure when the mobile terminal is in a flattened state, as provided in the embodiments of this application;

[0051] Figure 6a A schematic diagram of the antenna system distribution structure for a mobile terminal in a hovering state, provided in an embodiment of this application;

[0052] Figure 6b A schematic diagram of another antenna system distribution structure provided in this application embodiment when the mobile terminal is in a hovering state;

[0053] Figure 7a A schematic diagram of the antenna system distribution structure of a mobile terminal in a folded state, provided in an embodiment of this application;

[0054] Figure 7b for Figure 7a A magnified view of the local structure at point B of the structure shown;

[0055] Figure 7c A schematic diagram of another antenna distribution structure for a mobile terminal in a folded state, as provided in an embodiment of this application;

[0056] Figure 8 Another schematic diagram of the antenna system provided in this application embodiment when the mobile terminal is in a flattened state;

[0057] Figure 9 Provided for the embodiments of this application Figure 8 A schematic diagram of the radiation pattern of the satellite antenna of the mobile terminal shown when it is in the transmitting state;

[0058] Figure 10 Provided for the embodiments of this application Figure 6a A schematic diagram of the radiation pattern of the satellite antenna of the mobile terminal shown when it is in the transmitting state;

[0059] Figure 11 Provided for the embodiments of this application Figure 7a The diagram shows the radiation pattern of the satellite antenna of the mobile terminal when it is in the transmitting state.

[0060] Figure label:

[0061] 100 - Foldable bracket; 1 - First housing; 101 - First support surface; 2 - Second housing; 201 - Second support surface; 3 - Third housing;

[0062] 301 - Third support surface; 4 - First rotating shaft mechanism; 5 - Second rotating shaft mechanism;

[0063] 6-First radiator; 7-Second radiator; 8-Third radiator; 9-First feed point; 10-First switching assembly;

[0064] SW1 - First switching device; SW2 - Second switching device; 11 - Second switching assembly; SW3 - Third switching device; C1 - First capacitor;

[0065] SW4 - Fourth switching device; 12 - Third switching assembly; SW5 - Fifth switching device; C2 - Second capacitor; SW6 - Sixth switching device;

[0066] 200 - Flexible display screen. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0068] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.

[0069] References to “an embodiment” or “a specific embodiment” as used in this specification mean that one or more embodiments of this application include a particular feature, structure, or characteristic described in connection with that embodiment. The terms “comprising,” “including,” “having,” and variations thereof mean “including, but not limited to,” unless otherwise specifically emphasized.

[0070] To facilitate understanding of the mobile terminal provided in the embodiments of this application, its application scenarios will be introduced first below.

[0071] Figure 1 This is a schematic diagram of a mobile terminal performing satellite communication in an embodiment of this application, as shown below. Figure 1As shown, satellite communication belongs to non-terrestrial network (NTN) communication and can be used to communicate with mobile terminals. Compared with terrestrial communication, satellite communication can provide a wider coverage area. It is particularly useful for areas with few or no cellular communication base stations. Based on the satellite's orbital altitude, satellite communication systems can be divided into three types: geostationary earth orbit (GEO) satellite communication systems (also called synchronous orbit communication satellites), medium earth orbit (MEO) satellite communication systems, and low earth orbit (LEO) satellite communication systems. GEO satellites orbit at an altitude of 35,786 km, and their main advantage is that they remain relatively stationary relative to the ground and can provide a large coverage area. MEO satellites orbit at altitudes between 2,000 and 35,786 km, and their advantage is that global coverage can be achieved with a relatively small number of satellites. Considering the advantages and disadvantages of MEO satellite communication, it is currently mainly used for positioning and navigation. LEO satellites orbit at altitudes ranging from 300 to 2000 km. Compared to MEO and GEO satellites, LEO satellites orbit at lower altitudes, resulting in advantages such as lower data transmission latency, lower transmission loss, and relatively lower launch costs.

[0072] With the maturation of satellite communication technology, it is gradually being applied to various types of mobile terminals. For example, satellite communication functionality can be achieved by incorporating a satellite antenna into a currently popular foldable mobile terminal product.

[0073] Currently, to simultaneously meet users' demands for large display screens and portability in foldable mobile terminals, multi-fold foldable mobile terminal products, such as tri-fold, quad-fold, and penta-fold models, are gradually being applied to people's daily lives. Taking a tri-fold mobile terminal as an example... Figure 2 , Figure 2 This is a schematic diagram of a mobile terminal in a flattened state according to an embodiment of this application. The mobile terminal may include a foldable bracket 100 and a flexible display screen 200, with the flexible display screen 200 mounted on the foldable bracket 100. Furthermore, in this flattened state, the flexible display screen 200 is fully unfolded, at which point the display area of ​​the mobile terminal is at its maximum.

[0074] You can continue to refer to Figure 2The foldable bracket 100 of the mobile terminal may include three housings and two pivot mechanisms. For ease of explanation, the three housings are named first housing 1, second housing 2, and third housing 3, and the two pivot mechanisms are named first pivot mechanism 4 and second pivot mechanism 5. The first pivot mechanism 4 is located between the first housing 1 and the second housing 2, and the first housing 1 and the second housing 2 are rotatably connected via the first pivot mechanism 4. The second pivot mechanism 5 is located between the second housing 2 and the third housing 3, and the second housing 2 and the third housing 3 are rotatably connected via the second pivot mechanism 5. When the mobile terminal is in use, the first housing 1 and the second housing 2 can rotate towards or away from each other under the action of the first pivot mechanism 4, and the second housing 2 and the third housing 3 can rotate towards or away from each other under the action of the second pivot mechanism 5, thereby enabling the mobile terminal to close and unfold according to different usage scenarios.

[0075] To achieve communication via satellite, a communication connection must first be established between the mobile terminal's satellite antenna and the communication satellite. The radiation pattern of the satellite antenna is one of the factors affecting the communication connection speed and stability. For mobile terminals of different forms, such as foldable terminals in different folding configurations, they typically have different floor dimensions, and different floor dimensions have different effects on the radiation pattern. Therefore, by analyzing the radiation patterns of satellite antennas for mobile terminals with different floor dimensions, the design of the satellite antenna can be optimized to improve the satellite communication performance of the mobile terminal.

[0076] In view of this, the mobile terminal provided in this application utilizes multiple radiators to jointly generate the target radiation pattern of the satellite antenna, thereby optimizing the satellite antenna radiation pattern and improving the communication performance of the satellite antenna.

[0077] In this application, the foldable mobile terminal may include, but is not limited to, mobile phones, tablets, laptops, e-book readers, cameras, wearable devices, or home electronic devices. For ease of understanding, in the various embodiments of this application, a mobile phone is used as an example of a foldable mobile terminal for illustration.

[0078] In this application, the first housing 1, the second housing 2, and the third housing 3 can each form an installation space for mounting electronic components of the mobile terminal, such as circuit boards, batteries, receivers, speakers, or cameras. The circuit board can integrate electronic components such as the main controller, storage unit, antenna module, and power management module of the electronic device, while the battery can power the flexible display screen 200, circuit boards, receivers, speakers, cameras, and other electronic components. In one possible design, at least two of the first housing 1, second housing 2, and third housing 3 have installation spaces to distribute the mobile terminal components among the housings. In another possible design, only one of the first housing 1, second housing 2, or third housing 3 may have an installation space to centrally distribute the mobile terminal components within the aforementioned accommodating space.

[0079] The aforementioned flexible display screen 200 can be used to display information and provide an interactive interface for users. In various embodiments of this application, the flexible display screen 200 may be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light-emitting diode (QLED) display screen, etc.

[0080] In addition, for the purpose of understanding this application, the terms that may appear in the embodiments of this application are explained below.

[0081] Since foldable mobile terminals have various forms during use, such as a flattened state, a hovering state, and a folded state, for ease of description, the angle between the first housing 1 and the second housing 2 is considered the first angle, and the angle between the second housing 2 and the third housing 3 is considered the second angle.

[0082] Flattened state: This refers to the state in which the first housing 1, the second housing 2, and the third housing 3 of the foldable mobile terminal are fully unfolded, such as... Figure 2As shown, in the flattened state, the first angle between the first housing 1 and the second housing 2 can be between 175° and 185°, and the second angle between the second housing 2 and the third housing 3 can be between 175° and 185°. Specifically, the first angle between the first housing 1 and the second housing 2 can be 180°, and the second angle between the second housing 2 and the third housing 3 can be 180°.

[0083] Hovering state: This refers to the state where the first housing 1 and the second housing 2 are extended to a certain angle but not fully flattened. (See reference...) Figure 3 , Figure 3 This is a schematic diagram of a mobile terminal in a hovering state provided in an embodiment of this application. In this hovering state, the first angle between the first housing 1 and the second housing 2 can be between 45° and 175°, and the second angle between the second housing 2 and the third housing 3 can be between 45° and 175°.

[0084] Folded state: also known as closed state. In this state, the first housing 1 and the second housing 2 of the foldable mobile terminal are completely folded and closed, and the second housing 2 and the third housing 3 are completely folded and closed. The first angle is 0° and the second angle is 0°. Alternatively, in some embodiments, the first angle between the first housing 1 and the second housing 2 can also be located between 0° and 45°. In addition, the second angle between the second housing 2 and the third housing 3 can also be located between 0° and 45°.

[0085] Radiator: In an antenna, this is the device used to receive / transmit electromagnetic wave radiation. In some cases, the term "antenna" is narrowly defined as a radiator, which converts guided wave energy from the transmitter into radio waves, or converts radio waves into guided wave energy, for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator via a feed line, where it is converted into electromagnetic wave energy of a specific polarization and radiated in the desired direction. The receiving radiator converts electromagnetic wave energy of a specific polarization from a specific direction in space back into modulated high-frequency current energy, which is then transmitted to the receiver input via a feed line.

[0086] Ground / Plug: This can broadly refer to at least a portion of any grounding layer, ground plane, or grounding metal layer within a communication terminal (such as a mobile phone), or at least a portion of any combination of the aforementioned grounding layers, ground planes, or grounding components. "Ground / Plug" can be used for grounding components within the communication terminal. In one embodiment, "Ground / Plug" may include any one or more of the following: a grounding layer of the communication terminal's circuit board, a ground plane formed by the communication terminal's frame, a grounding metal layer formed by a thin metal film beneath the screen, a conductive grounding layer of the battery, and conductive or metallic components electrically connected to the aforementioned grounding layer / ground plane / metal layer. In one embodiment, the circuit board may be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12-14-layer board with 8, 10, 12, 13, or 14 layers of conductive material, or components separated and electrically insulated by dielectric or insulating layers such as glass fiber or polymers.

[0087] Any of the aforementioned grounding layers, ground planes, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material may be any of the following: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil on an insulating substrate and tin-plated copper, graphite-impregnated cloth, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. Those skilled in the art will understand that grounding layers / ground planes / grounding metal layers may also be made of other conductive materials.

[0088] The casing of a mobile terminal includes a frame that is circumferentially arranged around the perimeter of the casing. The frame, primarily composed of conductive material, can be referred to as the conductive frame or metal frame of the mobile terminal, suitable for industrial design (ID) with a metallic appearance. In one implementation, the outer surface of the frame is primarily made of a conductive material, such as metal, thus forming the appearance of a metal frame. In these implementations, the conductive portion of the frame, including its outer surface, can be used as an antenna radiator for the mobile terminal and is commonly referred to as a frame antenna.

[0089] In another implementation, the outer surface of the frame is primarily made of a non-conductive material, such as plastic, forming a non-metallic frame appearance suitable for non-metallic IDs. In another implementation, the inner surface of the frame may include a conductive material, such as a metal. In this implementation, the conductive portion of the inner surface of the frame can be used as an antenna radiator for the mobile terminal. It should be understood that the radiator (or the conductive material of the inner surface) disposed on the inner surface of the frame can be positioned close to the non-conductive material of the frame to minimize the volume occupied by the radiator and to be closer to the outside of the mobile terminal, achieving better signal transmission performance; this can also be referred to as a frame antenna. It should be noted that "the antenna radiator is positioned close to the non-conductive material of the frame" means that the antenna radiator can be tightly attached to the inner surface of the non-conductive material, embedded within the non-conductive material, or positioned close to the inner surface of the non-conductive material; for example, there can be a small gap between the antenna radiator and the inner surface of the non-conductive material. It should be understood that both the conductive and non-conductive materials can be considered part of the frame.

[0090] Radio frequency (RF) chip: This is the combination of all components of an antenna used for receiving and transmitting radio frequency waves. In the case of a receiving antenna, the RF chip can be considered the antenna section from the first amplifier to the front-end transmitter. In a transmitting antenna, the RF chip can be seen as the section after the last power amplifier. In some cases, the RF chip can also be understood as the feed unit. The RF chip has the function of converting radio waves into electrical signals and sending them to the receiver components. Generally, it is considered part of the antenna system for converting radio waves into electrical signals and vice versa. Maximum power transfer capability and efficiency should be considered when designing an antenna. For this purpose, the antenna feed impedance must be matched with the load resistance. The antenna feed impedance is a combination of resistance, capacitance, and inductance. To ensure maximum power transfer conditions, the two impedances (load resistance and feed impedance) should be matched. Matching can be achieved by considering frequency requirements and antenna design parameters such as gain, directivity, and radiation efficiency.

[0091] A power supply / feed circuit is a combination of all circuits used for receiving and transmitting radio frequency (RF) signals. A power supply circuit can include a transceiver and an RF front-end. In some narrower senses, "power supply circuit" refers to an RF integrated circuit (RFIC), which can be considered to include both the RF front-end chip and the transceiver. The power supply circuit has the function of converting radio waves (e.g., RF signals) into electrical signals (e.g., digital signals). It is generally considered part of the RF component.

[0092] In some embodiments, the electronic device may also include a test socket (or, RF socket, or RF test socket). This test socket can be used to insert a coaxial cable to test the characteristics of the RF front-end circuitry or the radiator of the antenna. The RF front-end circuitry can be considered as the circuitry coupled between the test socket and the transceiver.

[0093] In some embodiments, the radio frequency front-end circuit can be integrated into a radio frequency front-end chip in an electronic device, or the radio frequency front-end circuit and the transceiver can be integrated into a radio frequency chip in an electronic device.

[0094] It should be understood that any two feed circuits in the first / second / ...Nth feed circuit of this application can share the same transceiver, for example, by transmitting signals through a radio frequency channel in a transceiver (e.g., a port (pin) of a radio frequency chip); they can also share a radio frequency front-end circuit, for example, by processing signals through a switch or amplifier in a radio frequency front-end.

[0095] It should also be understood that the two feed circuits in the first / second / ...Nth feed circuit of this application typically correspond to two RF test sockets in an electronic device.

[0096] Feed line: Also called a transmission line, it refers to the connection line between the antenna's radio frequency chip and the radiator. Depending on the frequency and form, the transmission line can directly transmit current waves or electromagnetic waves. The connection point on the radiator where it connects to the transmission line is usually called the feed point. Transmission lines include conductive transmission lines, coaxial transmission lines, waveguides, or microstrip lines. Depending on the implementation, transmission lines can include bracket antenna bodies or glass antenna bodies. Depending on the carrier, transmission lines can be made of liquid crystal polymer (LCP), flexible printed circuit boards (FPC), or printed circuit boards (PCBs).

[0097] Resonant frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range in which resonance occurs. The resonant frequency can be a frequency range where the return loss characteristic is less than -6dB. The point of strongest resonance can be called the resonant point, and the frequency corresponding to the resonant point is the center frequency. The return loss characteristic of the center frequency can be less than -20dB. It should be understood that, unless otherwise specified, when the antenna / radiator in this application generates "first / second...resonance," the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or in other words, the lowest frequency resonance generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to a specific design, and each antenna mode can correspond to a fundamental mode resonance.

[0098] Resonant frequency band: The range of resonant frequencies is the resonant frequency band. The return loss characteristics at any frequency point within the resonant frequency band can be less than -6dB or -5dB.

[0099] Communication / Operating Frequency Band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting the B40 band operates within the frequency range of 2300MHz to 2400MHz, or in other words, its operating frequency band includes the B40 band. The frequency range that meets the specifications can be considered the antenna's operating frequency band. The width of the operating frequency band is called the operating bandwidth. The operating bandwidth of an omnidirectional antenna may reach 3-5% of the center frequency. The operating bandwidth of a directional antenna may reach 5-10% of the center frequency. Bandwidth can be considered as a frequency range on both sides of the center frequency (e.g., the resonant frequency of a dipole), where the antenna characteristics are within the acceptable range of the center frequency.

[0100] The resonant frequency band and the operating frequency band can be the same or different, or their frequency ranges can partially overlap. In one embodiment, the resonant frequency band of the antenna can cover multiple operating frequency bands of the antenna.

[0101] Medium wavelength: refers to the wavelength of electromagnetic waves propagating in a medium at the operating frequency band. For example, if the operating frequency band is [f1, f2], the corresponding medium wavelength is also the range [w1, w2]. Alternatively, to simplify calculations, the above-mentioned medium wavelength can also refer to the wavelength of electromagnetic waves propagating in the medium at the center frequency f0 of the operating frequency band. In this case, the medium wavelength is a specific value w0.

[0102] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port after passing through the antenna circuit to the transmit power at the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the higher the antenna's radiation efficiency. Conversely, the larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the antenna's radiation efficiency.

[0103] Antenna return loss can be represented by the S11 parameter, which is one of the S-parameters. S11 represents the reflection coefficient, and this parameter characterizes the antenna's transmission efficiency.

[0104] In one embodiment, the S11 diagram can be understood as a schematic diagram representing the resonance generated by the antenna. In one embodiment, the resonance shown in the S11 diagram within the range of -6dB can be understood as the resonant frequency / frequency range / operating frequency band generated by the antenna. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the less energy reflected back by the antenna itself, which means more energy actually enters the antenna, and the higher the antenna radiation efficiency; the larger the S11 parameter, the greater the antenna return loss, and the lower the antenna radiation efficiency.

[0105] It should be noted that in engineering, an S11 value of -6dB is generally used as the standard. When the S11 value of an antenna is less than -6dB, the antenna can be considered to be working normally, or the antenna can be considered to have good transmission efficiency.

[0106] Antenna pattern: also known as radiation pattern. It refers to the graph showing how the relative field strength (normalized modulus) of the antenna's radiated field changes with direction at a certain distance from the antenna. It is usually represented by two mutually perpendicular planar patterns passing through the direction of maximum radiation of the antenna.

[0107] Antenna radiation patterns typically have multiple radiating beams. The beam with the highest radiating intensity is called the main lobe, and the remaining beams are called side lobes. Among the side lobes, the side lobe in the opposite direction to the main lobe is also called the back lobe.

[0108] Radiation efficiency refers to the ratio of the power radiated by an antenna into space (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. The active power input to the antenna equals the antenna's input power minus the power loss. Power loss mainly includes return loss power, ohmic loss power of the metal, and / or dielectric loss power. Both metal loss and dielectric loss are factors affecting radiation efficiency.

[0109] Those skilled in the art will understand that radiation efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the radiation efficiency is to 0 dB, the better the radiation efficiency of the antenna.

[0110] dB: This stands for decibel, a logarithmic concept with base 10. Decibels are only used to evaluate the proportional relationship between two physical quantities; they themselves have no physical dimensions. For every 10-fold increase in the ratio between two quantities, their difference can be expressed as 10 dB. For example: A = 100, B = 10, C = 5, D = 1, then A / D = 20 dB; B / D = 10 dB; C / D = 7 dB; B / C = 3 dB. That is, a 10 dB difference between two quantities is a 10-fold difference, a 20 dB difference is a 100-fold difference, and so on. A 3 dB difference is a 2-fold difference between the two quantities.

[0111] The term "end" in the context of the main radiator's first / second / third / fourth / grounded / open ends should not be narrowly interpreted as an endpoint or end physically disconnected from other radiators. It can also refer to a segment of the main radiator including the first endpoint, which is the endpoint of the main radiator at the gap. For example, the first end of the main radiator can be considered a segment of the main radiator within a range of one-eighth of a first wavelength from that first endpoint. The first wavelength can be the wavelength corresponding to the operating frequency band of the main radiator, the wavelength corresponding to the center frequency of the operating frequency band, or the wavelength corresponding to the resonant point. In one embodiment, "end / point" can include a connection / coupling region on the radiator that couples to other conductive structures. For example, a feed end / feed point can be a coupling region on the antenna radiator that couples to a feed structure (e.g., a region facing a portion of the feed structure). Similarly, a ground end / grounding point can be a connection / coupling region on the antenna radiator that couples to a ground structure.

[0112] Open and Closed Terminals: In some embodiments, open and closed terminals are, for example, relative to whether or not they are grounded; the closed terminal is grounded, and the open terminal is not grounded. In one embodiment, the open terminal may also be referred to as a floating terminal, a free terminal, an open terminal, or an open-circuit terminal. In one embodiment, the closed terminal may also be referred to as a grounded terminal or a short-circuit terminal. It should be understood that in some embodiments, other conductors can be coupled through the open terminal to transfer coupled energy (which can be understood as transferring current).

[0113] In some embodiments, the open end and the closed end are, for example, relative to other conductors, with the closed end electrically connected to other conductors and the open end not electrically connected to other conductors.

[0114] To put it simply, the "open end" of a radiator can be defined as one end of the radiator that is spaced apart from the floor or coupled to the floor through a capacitive device.

[0115] To put it simply, the "grounding terminal" of a radiator can be understood as: if one end of the radiator is directly connected to the floor or coupled to the floor through an inductive device, it can be regarded as the grounding terminal of the radiator.

[0116] In some embodiments, the understanding of "closed end" can also be from the perspective of current distribution. A closed end or ground end can be understood as a point of high current or low electric field on a radiator. In one embodiment, coupling electronic devices (e.g., inductive devices) through a closed end can maintain the current distribution characteristics of the point of high current / low electric field. In one embodiment, opening a gap at or near the closed end (e.g., filling the gap with insulating material) can maintain the current distribution characteristics of the point of high current / low electric field.

[0117] In some embodiments, the understanding of "open terminal" can also be from the perspective of current distribution. An open terminal or a floating terminal can be understood as a point with a small current or a point with a large electric field on the radiator. In one embodiment, coupling electronic devices (e.g., capacitive devices) through an open terminal can maintain the current distribution characteristics of the point with a small current or a large electric field.

[0118] It should be understood that when an electronic device (e.g., capacitor, inductor, etc.) is coupled at the radiator end of a gap (which, from the perspective of the radiator's structure, resembles a radiator at the opening of an open or suspended end), the radiator end can be a point with a large current / small electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0119] Capacitance: can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance includes capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitance) includes the equivalent capacitance formed by two conductive components separated by a certain gap.

[0120] In the embodiments of this application, the wavelength in a certain wavelength mode of the antenna (such as half-wavelength mode, etc.) can refer to the wavelength of the signal radiated by the antenna. It should be understood that the wavelength of the radiated signal in air can be calculated as follows: Wavelength = Speed ​​of light / Frequency, where the frequency is the frequency of the radiated signal. The wavelength of the radiated signal in a medium can be calculated as follows: Wavelength = (Speed ​​of light / ... )) / frequency, where, Let be the relative permittivity of the medium, and be the frequency of the radiated signal.

[0121] Coupling: In this application, it can be understood as indirect coupling, and "coupled connection" can be understood as indirect coupling connection. "Indirect coupling" can be understood as two conductors conducting electricity through a gap / non-contact manner. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by forming an equivalent capacitance through coupling between the gaps between two conductive parts.

[0122] The symmetry (e.g., axial symmetry, or central symmetry), parallelism, perpendicularity, and similarity (e.g., same length, same width, etc.) mentioned in the embodiments of this application are all relative to the current technological level, and not absolute and strict mathematical definitions. There can be a predetermined angular deviation between two mutually parallel or perpendicular structures. In one embodiment, the predetermined threshold can be less than or equal to a threshold of 1 mm, for example, the predetermined threshold can be 0.5 mm or 0.1 mm. In one embodiment, the predetermined angle can be an angle within the range of ±10°, for example, the predetermined angle deviation is ±5°.

[0123] It is worth noting that in the embodiments of this application, "perpendicular" means that there can be a predetermined angle deviation between the two. For example, the predetermined angle can be 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94° or 95°, etc.

[0124] It is worth noting that in the embodiments of this application, "parallel" means that there can be a predetermined angular deviation between the two. For example, the predetermined angle can be 0°, 0.5°, 1°, 1.5°, 2°, 3°, 4°, 4.5°, or 5°, etc.

[0125] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0126] Figure 4 This is a simplified schematic diagram illustrating the structure of a mobile terminal in a flattened state, as provided in an embodiment of this application. Figure 4 As shown in the embodiments of this application, in addition to the first housing 1, second housing 2, third housing 3, first rotating mechanism 4, and second rotating mechanism 5 described above, the mobile terminal also includes an antenna system. The antenna system includes a satellite antenna, which is used to receive / transmit electromagnetic waves. Specifically, the satellite antenna is used to receive electromagnetic waves from a communication satellite or to transmit electromagnetic waves to a communication satellite. This allows the mobile terminal to achieve satellite communication functionality through the transmission of electromagnetic waves between the satellite antenna and the communication satellite. In specific embodiments, the mobile terminal can achieve at least one of satellite SMS, satellite phone, or satellite internet access through the satellite antenna.

[0127] In the specific configuration of the satellite antenna, the satellite antenna includes a first radiator 6, a second radiator 7, and a third radiator 8. In this application, the first radiator 6, the second radiator 7, and the third radiator 8 can be respectively disposed in different housings of the mobile terminal.

[0128] Additionally, along the axial direction of the mobile terminal, the first radiator 6, the second radiator 7, and the third radiator 8 can all be located at one end of the mobile terminal; for example, they can be located at... Figure 2 The A end of the mobile terminal shown in this application can represent the normal operating state of the mobile terminal, and is the relatively upper end of the mobile terminal when the flexible display screen 200 faces the user. This facilitates satellite antenna alignment. In a specific embodiment, as shown... Figure 4 As shown, the first radiator 6 is disposed at the end of the first housing 1, the second radiator 7 is disposed at the end of the third housing 3, and the third radiator 8 is disposed at the end of the second housing 2.

[0129] To achieve communication functionality, the satellite antenna also includes a satellite radio frequency (RF) link, a first tuning circuit, and a second tuning circuit. The RF link is coupled to a third radiator 8 to power the third radiator 8, enabling the third radiator 8 to function as the main radiator of the satellite antenna and communicate with the communication satellite. The first radiator 6 is coupled to the first tuning circuit, and the second radiator 7 is coupled to the second tuning circuit. It is worth noting that this application does not limit the specific locations of the satellite RF link, the first tuning circuit, and the second tuning circuit; they can be exemplary, mounted on a circuit board in a mobile terminal and housed within the mounting space formed by the casing.

[0130] This allows the first tuning circuit and the first radiator to form a resonant structure, and the second tuning circuit and the second radiator 7 to form another resonant structure. These two resonant structures influence the resonant mode of the third radiator 8, thereby adjusting the target radiation pattern of the satellite antenna and / or increasing its gain. Using the antenna system design provided in this application, when the satellite antenna is in operation, the first radiator 6, the first tuning circuit, the second radiator 7, the second tuning circuit, and the third radiator 8 can jointly generate the target radiation pattern of the satellite antenna. This facilitates the optimization of the satellite antenna radiation pattern and / or increases its gain, thereby improving the communication performance of the satellite antenna.

[0131] It is worth mentioning that the “first radiator 6 and the first tuning circuit, the second radiator 7 and the second tuning circuit, and the third radiator 8 used to jointly generate the target radiation pattern of the satellite antenna” mentioned above can be understood as “the first radiator 6 and the first tuning circuit”, “the second radiator 7 and the second tuning circuit”, and the third radiator 8 all affect the target radiation pattern of the satellite antenna, such as affecting the maximum radiation direction of the target radiation pattern.

[0132] As described above, the floor size of a foldable mobile terminal varies depending on its folded state, and these different floor sizes have varying impacts on the radiation pattern. To understand the optimization effect of the antenna system design provided in this application on the satellite antenna radiation pattern, the communication performance of the satellite antenna of the mobile terminal in different folded states will be analyzed below.

[0133] Figure 5a This is a schematic diagram of the antenna system distribution structure when the mobile terminal provided in this application is in a flattened state. Figure 5a In the illustrated configuration, the mobile terminal's floor is composed of floor panels from three housings connected sequentially along their arrangement direction, resulting in the largest overall size of the mobile terminal's floor. Furthermore, in... Figure 5aIn the antenna system shown, the third radiator 8 is disposed in the second housing 2, the first radiator 6 is disposed in the first housing 1, and the second radiator 7 is disposed in the third housing 3. In this embodiment, the first radiator 6 is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator 7 is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. Furthermore, by feeding the third radiator 8 through a satellite radio frequency link, the third radiator 8 can be used to generate a third resonance.

[0134] It is worth mentioning that, in this application, a resonant structure can refer to a structure that generates resonance itself or does not generate obvious resonance, but can affect the resonance of the third radiator 8. For example, the resonant structure can guide the resonant current of the third radiator 8 to affect the resonant mode of the third radiator 8.

[0135] Furthermore, the frequency corresponding to the resonant structure refers to the frequency corresponding to the electrical length of the branch of the tuning circuit to which the radiator is connected. When the resonant structure is fed, the frequency at which it can resonate can be considered the frequency corresponding to the resonant structure. It is understandable that the frequency corresponding to the resonant structure is related to the branch of the tuning circuit to which the radiator is connected.

[0136] The different branches of the first tuning circuit can be understood as the first tuning circuit having different conduction states, and each conduction state can be considered as a branch of the first tuning circuit. Based on this, the first frequency corresponding to the first resonant structure can be adjusted by connecting the first radiator 6 to the corresponding branch of the first tuning circuit.

[0137] Similarly, the different branches of the second tuning circuit can be understood as the second tuning circuit having different conduction states, and each conduction state can be considered as a branch of the second tuning circuit. In this way, by connecting the second radiator 7 to the corresponding branch of the second tuning circuit, the second frequency corresponding to the second resonant structure can be adjusted.

[0138] In one embodiment, in Figure 5a In the illustrated scheme, both the first frequency and the resonant frequency of the third resonance are within the first communication frequency band of the satellite antenna. This allows the current flowing from the third radiator 8 to the first radiator 6 to reach the ground through the first radiator 6. Consequently, the radiation pattern of the satellite antenna is tilted towards the direction of the third housing 3.

[0139] In one embodiment, if the second frequency is higher than the resonant frequency of the third resonance, then the coupling between the second radiator 7 and the third radiator 8 causes the current in the third radiator 8 (such as...) to increase. Figure 5aThe arrow (indicated by a single dotted line) flows towards the second radiator 7, and then towards the floor. Furthermore, due to... Figure 5a In the flattened state shown, the mobile terminal has a large floor size, and the current on the floor (such as...) is... Figure 5a The arrows (indicated by the dashed lines) flow in a traveling wave pattern along the edge and floor to generate an orthogonally polarized radiation field. This enhances the circular polarization gain of the satellite antenna, which in turn increases the beamwidth of the radiation pattern to meet the satellite antenna's alignment requirements, thereby improving the satellite antenna's communication performance.

[0140] Understandably, in Figure 5a The image only schematically illustrates the approximate shape of the satellite antenna's radiation pattern and its beamwidth. In practical applications, as long as the beamwidth of the upper hemisphere of the satellite antenna's radiation pattern meets regulatory requirements (e.g., greater than or equal to ±15°), the satellite antenna's alignment requirements can be satisfied.

[0141] It is worth noting that this application does not limit the first communication frequency band of the satellite antenna. Exemplary examples include the operating frequency band of the satellite antenna in the receiving state when the mobile terminal is in a flattened state; or the operating frequency band of the satellite antenna in the transmitting state. Furthermore, it is understood that when the satellite antenna communicates with different communication satellites, the operating frequency band of the satellite antenna in the receiving state may be different, and the operating frequency band of the satellite antenna in the transmitting state may also be different. However, the antenna system provided in this application, when the mobile terminal is in a flattened state, can adjust the first frequency, the second frequency, and the resonant frequency of the third radiator 8 according to different application scenarios to satisfy the above relationships. This optimizes the radiation pattern of the satellite antenna under the combined action of the first radiator and the first tuning circuit, the second radiator and the second tuning circuit, and the third radiator, and / or increases the gain of the satellite antenna, thereby improving the satellite communication performance of the mobile terminal.

[0142] In this application, the satellite antenna also includes a first feed point 9, through which the satellite radio frequency link can be coupled to the third radiator 8. Additionally, when the mobile terminal is in... Figure 5a When the object is flattened as shown, and the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the third housing 3, and the third radiator 8 is disposed in the second housing 2, as shown... Figure 4 As shown, the distance L1 between the first feed point 9 and the axis of the first rotating shaft mechanism 4 is greater than the distance L2 between the first feed point 9 and the axis of the second rotating shaft mechanism 5. This helps to strengthen the radiation pattern of the satellite antenna towards the direction of the third housing 3, thereby improving the radiation efficiency of the satellite antenna.

[0143] In one embodiment, in Figure 5aIn the illustrated scheme, in order for the first resonant structure to suppress the current of the third resonant, the frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonant can satisfy: f13 ≤ 10%. f3. In a specific embodiment, the frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: 0 ≤ f13 ≤ 100 MHz, for example, f13 = 50 MHz, f13 = 65 MHz or f13 = 90 MHz, etc.

[0144] In one embodiment, the frequency difference f23 between the second frequency f2 and the third resonant frequency f3 satisfies: f23 > 10%. f3, for example, can make f23 ≥ 20%. f3. This allows the second resonant structure to guide the current of the third resonant to the ground plane and the frame, thereby enhancing the orthogonal polarization characteristics of the current between the ground plane current and the currents of the second radiator 7 and the third radiator 8, which is beneficial for improving the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f23 between the second frequency f2 and the resonant point frequency f3 of the third resonant satisfies: f23 > 100MHz. For example, f23 ≥ 300MHz, such as f23 = 350MHz, f23 = 500MHz, f23 = 600MHz, f23 = 700MHz, or f23 = 1000MHz, etc.

[0145] It is worth mentioning that, in the above Figure 5a In the illustrated embodiment, by setting the first frequency corresponding to the first resonant structure within the first communication frequency band, the radiation pattern of the satellite antenna is tilted towards the third housing 3. In another possible embodiment of this application, when the mobile terminal is in a flattened state and the third radiator 8 is disposed within the second housing 2, if the satellite antenna is in operation, the resonant frequency of the third resonator can be made to fall within the first communication frequency band of the satellite antenna, with the first frequency and the second frequency both higher than the first communication frequency band. This enhances the circular polarization gain of the satellite antenna by creating an orthogonally polarized radiation field through the combined effect of the floor and frame radiators, thereby improving the communication performance of the satellite antenna.

[0146] In one embodiment, when the mobile terminal is in a flattened state and the third radiator 8 is disposed on the second housing 2, if the satellite antenna is in an operational state, in a possible embodiment of this application, the frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance can also satisfy: f13 > 10%. f3, for example, can make f13 ≥ 20%. f3, through the coupling between the first radiator 6 and the third radiator 8, generates an orthogonally polarized radiation field between the ground current and the current between the first radiator 6 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna. The frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3, for example, can make f23 ≥ 20%. f3, through the coupling between the second radiator 7 and the third radiator 8, generates an orthogonally polarized radiation field between the ground current and the current between the second radiator 7 and the third radiator 8, which is beneficial to improving the circular polarization gain of the satellite antenna.

[0147] In one embodiment, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: f13 > 100MHz. For example, f13 can be ≥ 300MHz, such as f13 = 350MHz, f13 = 500MHz, f13 = 600MHz, f13 = 700MHz, or f13 = 1000MHz. Furthermore, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23 > 100MHz. For example, f23 can be ≥ 300MHz, such as f23 = 350MHz, f23 = 500MHz, f23 = 600MHz, f23 = 700MHz, or f23 = 1000MHz.

[0148] In the above embodiments, the description focuses on the effect of the radiation pattern generated by the three radiators together, using the example of placing the third radiator 8 on the second housing 2. In practical applications, the placement positions of the three radiators can be adjusted according to specific design requirements. For example, refer to... Figure 5b , Figure 5b This is a schematic diagram of another antenna system distribution structure when the mobile terminal provided in this application is in a flattened state. (Similar to the above...) Figure 5a The mobile terminal shown has different placement positions for each radiator. Figure 5b In the first housing 1, the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3.

[0149] exist Figure 5b In the embodiment shown, when the satellite antenna is in operation, the first radiator 6 is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator 7 is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator 8 is used to generate a third resonance.

[0150] In one embodiment, the resonant frequency of the third resonance is within the first communication frequency band of the satellite antenna, but the first frequency and the second frequency are both higher than the first communication frequency band. This allows the first resonant structure formed by the first radiator 6 through the first tuning circuit and the second resonant structure formed by the second radiator 7 through the second tuning circuit to significantly influence the resonant mode of the resonance generated by the third radiator 8, thereby adjusting the radiation pattern and circular polarization gain of the satellite antenna and improving its radiation efficiency.

[0151] Additionally, in one possible embodiment, when the mobile terminal is in Figure 5b In the state shown, the frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance can also satisfy: f13 > 10%. f3, for example, can make f23 ≥ 20%. f3. This causes the current between the first radiator 6 and the third radiator 8, and the ground current to generate an orthogonally polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f13 between the resonant frequency f1 of the first resonance and the resonant frequency f3 of the third resonance satisfies: f13 > 100MHz. For example, f13 ≥ 300MHz, such as f13 = 350MHz, f13 = 500MHz, f13 = 600MHz, f13 = 700MHz, or f13 = 1000MHz, etc.

[0152] The frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3, for example, can make f13 ≥ 20%. f3. This causes the current between the second radiator 7 and the third radiator 8, and the ground current to generate an orthogonally polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f23 between the resonant frequency f2 of the second resonance and the resonant frequency f3 of the third resonance satisfies: f23 > 100MHz. For example, f23 can be ≥ 300MHz, such as f23 = 350MHz, f23 = 500MHz, f23 = 600MHz, f23 = 700MHz, or f23 = 1000MHz, etc.

[0153] Figure 5b The other structures of the mobile terminal shown can be referenced. Figure 5a The settings for the mobile terminal shown are described below and will not be elaborated upon here.

[0154] In one embodiment, when the mobile terminal is in a flattened state, and the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3, if the satellite antenna is in an operational state, the resonant frequency of the first frequency and the resonant point frequency of the third resonance can be made to be within the first communication frequency band of the satellite antenna, while the second frequency is higher than the first communication frequency band. This allows for adjustment of the maximum radiation direction of the satellite antenna's radiation pattern while simultaneously increasing the circular polarization gain of the satellite antenna.

[0155] In one embodiment, when the mobile terminal is in a flattened state, and the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3, if the satellite antenna is in an operational state, the frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: f13 ≤ 10%. f3, through the coupling between the first radiator 6 and the third radiator 8, suppresses the current in the third radiator 8, thereby adjusting the maximum radiation direction of the radiation pattern. The frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3, for example, can make f23 ≥ 20%. f3, through the coupling between the second radiator 7 and the third radiator 8, generates an orthogonally polarized radiation field between the ground current and the current between the second radiator 7 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna.

[0156] In one embodiment, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: 0 ≤ f13 ≤ 100 MHz. For example, f13 = 50 MHz, f13 = 65 MHz, or f13 = 90 MHz, etc. Additionally, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23 > 100 MHz. For example, f23 ≥ 300 MHz can be used, such as f23 = 350 MHz, f23 = 500 MHz, f23 = 600 MHz, f23 = 700 MHz, or f23 = 1000 MHz, etc.

[0157] Figure 6a This is a schematic diagram of the antenna system distribution structure for a mobile terminal in a hovering state, as provided in an embodiment of this application. Figure 6a As shown, the first housing 1 includes a first support surface 101 for supporting the flexible display screen, the second housing 2 includes a second support surface 201 for supporting the flexible display screen, and the third housing 3 includes a third support surface 301 for supporting the flexible display screen. In this hovering state, the first support surface 101 and the second support surface 201 are coplanar, and the third support surface 301 intersects with the second support surface 201.

[0158] It is worth mentioning that in this application, the first support surface 101 and the second support surface 201 are coplanar, which can be understood as the included angle between the first support surface 101 and the second support surface 201 being 175°~185°. In practical applications, the included angle between the first support surface 101 and the second support surface 201 can be 180°. Furthermore, the intersection of the third support surface 301 and the second support surface 201 can satisfy the following included angle α: 45°≤α≤135°, for example, 60°≤α≤120° or 80°≤α≤100°. In practical applications, α can be 90°.

[0159] exist Figure 6a In the illustrated embodiment, the first radiator 6 is disposed in the first housing 1, the third radiator 8 is disposed in the second housing 2, and the second radiator 7 is disposed in the third housing 3. The first radiator 6 is coupled to the ground plane via another branch of the first tuning circuit to form a fourth resonant structure, corresponding to a fourth frequency. The second radiator 7 is coupled to the ground plane via another branch of the second tuning circuit to form a fifth resonant structure, corresponding to a fifth frequency. The third radiator 8 is used to generate a sixth resonance. The resonant frequencies of the fifth and sixth resonances are within the second communication frequency band of the satellite antenna, while the fourth frequency is higher than the second communication frequency band.

[0160] Because in Figure 6a In the state shown, the mobile terminal has a large floor size and the current on the floor is vertically distributed, which can achieve circular polarization, thus which is beneficial to the performance improvement of the satellite antenna.

[0161] It is worth noting that this application does not limit the second communication frequency band of the satellite antenna. Exemplary examples include the operating frequency band of the satellite antenna in the receiving state when the mobile terminal is hovering, or the operating frequency band of the satellite antenna in the transmitting state. Furthermore, it is understood that when the satellite antenna communicates with different communication satellites, the operating frequency band of the satellite antenna in the receiving state may be different, and the operating frequency band of the satellite antenna in the transmitting state may also be different. However, the antenna system provided in this application, when the mobile terminal is hovering, can adjust the fourth frequency, the fifth frequency, and the resonant frequency of the third radiator 8 according to different application scenarios to satisfy the above relationships. This optimizes the radiation pattern of the satellite antenna under the combined action of the first radiator and the first tuning circuit, the second radiator and the second tuning circuit, and the third radiator, and / or increases the gain of the satellite antenna, thereby improving the satellite communication performance of the mobile terminal.

[0162] In one embodiment of this application, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance can satisfy: f46 > 10%. f6, for example, can make f46 ≥ 20%. f6, through the coupling between the first radiator 6 and the third radiator 8, generates an orthogonally polarized radiation field between the ground current and the current between the first radiator 6 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46 > 100MHz. For example, f46 ≥ 300MHz, such as f46 = 350MHz, f46 = 500MHz, f46 = 600MHz, f46 = 700MHz, or f46 = 1000MHz, etc.

[0163] In one embodiment of this application, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f3. The coupling between the second radiator 7 and the third radiator 8 suppresses the current in the third radiator 8, thereby adjusting the maximum radiation direction of the radiation pattern. In a specific embodiment, the frequency difference f56 between the resonant frequency f5 of the fifth resonance and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f56 ≤ 100MHz, for example, f56 = 50MHz, f56 = 65MHz, or f56 = 90MHz, etc.

[0164] It is worth mentioning that when the mobile terminal is in Figure 6a In the hovering state shown, the resonant frequency of the sixth resonance can be within the second communication band of the satellite antenna, while the fourth and fifth frequencies are higher than the second communication band. Because the mobile terminal has a large floor size, and the current of the satellite antenna can be vertically distributed on the floor to achieve circular polarization, this is beneficial for improving the performance of the satellite antenna.

[0165] Understandably, in practical applications, the placement of the three radiators can be adjusted according to specific design requirements. For example, such as... Figure 6b As shown, Figure 6b This is a schematic diagram of another antenna system distribution structure provided in this application embodiment when the mobile terminal is in a hovering state. (Similar to the above...) Figure 6a The mobile terminal shown has different placement positions for each radiator. Figure 6b In this configuration, a first radiator 6 is disposed in a first housing 1, a second radiator 7 is disposed in a second housing 2, and a third radiator 8 is disposed in a third housing 3. The resonant frequency of the sixth resonance generated by the fifth frequency and the third radiator 8 is within the second communication frequency band of the satellite antenna, but the fourth frequency is higher than the second communication frequency band. When the mobile terminal is in... Figure 6bWhen hovering as shown, the large size of the floor allows the satellite antenna current to be vertically distributed on the floor, thus achieving circular polarization, which is beneficial for improving the performance of the satellite antenna.

[0166] Additionally, when the mobile terminal is in Figure 6b In the state shown, in one possible embodiment, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance can also satisfy: f46 > 10%. f6, for example, can make f46 ≥ 20%. f6, through the coupling between the first radiator 6 and the third radiator 8, generates an orthogonally polarized radiation field between the ground current and the current between the first radiator 6 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f46 between the resonant frequency f4 of the fourth resonance and the resonant frequency f6 of the sixth resonance satisfies: f46 > 100MHz. For example, f46 ≥ 300MHz, such as f46 = 350MHz, f46 = 500MHz, f46 = 600MHz, f46 = 700MHz, or f46 = 1000MHz, etc.

[0167] The frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f6, through the coupling between the second radiator 7 and the third radiator 8, suppresses the current in the third radiator 8, thereby adjusting the maximum radiation direction of the radiation pattern. In a specific embodiment, the frequency difference f56 between the fifth frequency f5 and the sixth frequency f6 satisfies: 0 ≤ f56 ≤ 100 MHz, for example, f56 = 50 MHz, f56 = 65 MHz, or f56 = 90 MHz, etc.

[0168] Figure 6b The other structures of the mobile terminal shown can be referenced. Figure 6a The settings for the mobile terminal shown are described below and will not be elaborated upon here.

[0169] It is worth mentioning that when the mobile terminal is in Figure 6b In the hovering state shown, with the first radiator 6 disposed in the first housing 1, the second radiator 7 disposed in the second housing 2, and the third radiator 8 disposed in the third housing 3, if the satellite antenna is in working condition, the resonant frequencies of the first, second, and third resonators can still be within the first communication frequency band of the satellite antenna. This still allows the current of the satellite antenna to be vertically distributed on the floor, thus achieving circular polarization. Therefore, it is beneficial to improving the performance of the satellite antenna, and also allows for adjustment of the maximum radiation direction of the radiation pattern.

[0170] In one embodiment of this application, when the mobile terminal is in Figure 6b In the hovering state shown, with the first radiator 6 disposed in the first housing 1, the second radiator 7 disposed in the second housing 2, and the third radiator 8 disposed in the third housing 3, if the satellite antenna is in working condition, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance can also satisfy: f46 ≤ 10%. f6. Furthermore, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f6. This still allows for the adjustment of the maximum radiation direction of the radiation pattern while achieving circular polarization and improving the performance of the satellite antenna.

[0171] In another embodiment of this application, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f46 ≤ 100 MHz, for example, f46 = 50 MHz, f46 = 65 MHz, or f46 = 90 MHz, etc. Furthermore, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f56 ≤ 100 MHz, for example, f56 = 50 MHz, f56 = 65 MHz, or f56 = 90 MHz, etc.

[0172] It is worth mentioning that, Figure 6a and Figure 6b In the embodiment shown, the third housing 3 is folded along the side of the second support surface 201 away from the flexible display screen. This allows the flexible display screen to be used for display on the portion of the first support surface 101 and the second support surface 201, resulting in a larger display area and providing a better user experience.

[0173] In some other possible embodiments of this application, the third housing 3 can also be folded along the side of the second support surface 201 facing the flexible display screen. This allows the mobile terminal to provide a larger display surface while also providing a certain degree of privacy for the user by using the shielding provided by the third housing 3.

[0174] In summary, for multi-fold mobile terminals, regardless of whether the third radiator 8 is located on a central or peripheral shell, when the mobile terminal is in its fully unfolded state, a first resonant structure can be installed on at least one shell adjacent to the shell containing the third radiator 8. The frequency corresponding to this first resonant structure is set to be higher than the operating frequency band of the third radiator 8 (for example, the frequency difference between the frequency corresponding to the first resonant structure and the resonant point frequency of the third radiator 8 is >10%) to enhance the circular polarization gain of the satellite antenna. Other shells on the multi-fold shell can also be equipped with second and third resonant structures, etc. The frequency corresponding to any of the second or third resonant structures can be higher than the aforementioned operating frequency band, further enhancing the circular polarization gain. Alternatively, the frequency corresponding to any of the second or third resonant structures can fall within the aforementioned operating frequency band, or the frequency difference between the frequency corresponding to any of the resonant structures and the resonant point frequency of the third radiator 8 can be ≤10%, improving the radiation pattern of the satellite antenna.

[0175] When the mobile terminal is in a hovering state, the third radiator 8 is disposed on one of the housings that are intersecting (e.g., L-shaped), and the frequency corresponding to the resonant structure on the other housing that is intersecting falls within the operating frequency band of the third radiator 8 (or the frequency difference from the resonant frequency of the third radiator 8 is ≤10%). Based on this hovering state design, the circular polarization gain of the satellite antenna can be enhanced, and the radiation pattern can also be improved. Any of the frequencies corresponding to the resonant structures on the other housings of the multi-fold housing can be higher than the operating frequency band of the third radiator 8 to further enhance the circular polarization gain of the satellite antenna, or they can also fall within the operating frequency band of the third radiator 8 (or the frequency difference from the resonant frequency of the third radiator 8 is ≤10%) to improve the radiation pattern.

[0176] Figure 7a This is a schematic diagram of the antenna system distribution structure of a mobile terminal in a folded state, as provided in an embodiment of this application. Figure 7a As shown, the first housing 1 includes a first support surface 101 for supporting the flexible display screen, the second housing 2 includes a second support surface 201 for supporting the flexible display screen, and the third housing 3 includes a third support surface 301 for supporting the flexible display screen. Wherein, in Figure 7a In the state shown, the first support surface 101 and the second support surface 201 are coplanar, and the third support surface 301 is opposite to the second support surface 201. That is to say, the third housing 3 is folded to the side of the second housing 2 that is away from the flexible display screen.

[0177] exist Figure 7aIn the illustrated embodiment, the third radiator 8 is disposed in the second housing 2, the first radiator 6 is disposed in the first housing 1, and the second radiator 7 is disposed in the third housing 3. When the satellite antenna is in operation, the first radiator 6 is coupled to the ground plane through another branch of the first tuning circuit to form a seventh resonant structure, corresponding to a seventh frequency. The second radiator 7 is coupled to the ground plane through another branch of the second tuning circuit to form an eighth resonant structure, corresponding to an eighth frequency. The third radiator 8 is used to generate a ninth resonance. The resonant frequency of the ninth resonance is within the third communication frequency band of the satellite antenna. The seventh frequency is higher than the third communication frequency band, and the eighth frequency is higher than the third communication frequency band.

[0178] It is worth noting that this application does not limit the third communication frequency band of the satellite antenna; an exemplary example is a mobile terminal... Figure 7a When folded as shown, the satellite antenna operates in the receiving frequency band; alternatively, it can also operate in the transmitting frequency band. Furthermore, it is understood that when the satellite antenna communicates with different communication satellites, the receiving frequency band and the transmitting frequency band may differ. However, the antenna system provided in this application operates in the receiving frequency band when the mobile terminal is in... Figure 7a When in the folded state shown, the resonant frequencies of the seventh frequency, the eighth frequency, and the third radiator 8 can be adjusted according to different application scenarios to satisfy the above relationship. This optimizes the radiation pattern of the satellite antenna under the combined action of the first radiator and the first tuning circuit, the second radiator and the second tuning circuit, and the third radiator, and / or increases the gain of the satellite antenna to improve the satellite communication performance of the mobile terminal.

[0179] Reference Figure 7b , Figure 7b for Figure 7a A magnified view of a portion of the structure at point B. When the mobile terminal is in this folded state, the second radiator 7 can act as a parasitic radiator for the third radiator 8. Figure 7b As shown, the current distribution of the second radiator 7 is similar to that of the third radiator 8, which can effectively reduce the decrease in the radiation efficiency of the satellite antenna caused by the folding of the third housing 3, so that the satellite antenna can still meet certain communication requirements. In addition, the mobile terminal is in... Figure 7a In the folded state shown, its floor size is slightly larger, so the satellite antenna also has some characteristics of a traveling wave antenna.

[0180] Additionally, when the mobile terminal is in Figure 7a In the state shown, in one possible embodiment, the frequency difference f79 between the seventh frequency f7 and the resonant frequency f9 of the ninth resonance satisfies: f79 > 10%. f9, for example, can make f79 ≥ 10%. f9, through the coupling between the first radiator 6 and the third radiator 8, generates an orthogonally polarized radiation field between the ground current and the current between the first radiator 6 and the third radiator 8, which is beneficial for improving the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f79 between the seventh harmonic frequency f7 and the resonant point frequency f9 of the ninth harmonic satisfies: f79 > 100MHz. For example, f79 ≥ 300MHz, such as f79 = 350MHz, f79 = 500MHz, f79 = 600MHz, f79 = 700MHz, or f79 = 1000MHz, etc.

[0181] The frequency difference f89 between the eighth frequency f8 and the ninth frequency f9 satisfies: f89 > 10%. f9, for example, can make f89 ≥ 10%. f9, through the coupling between the second radiator 7 and the third radiator 8, enables the ground current to generate an orthogonally polarized radiation field with the current between the second radiator 7 and the third radiator 8, which is beneficial for improving the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f89 between the resonant frequency f8 of the eighth resonance and the resonant frequency f9 of the ninth resonance satisfies: f89 > 100MHz. For example, f89 ≥ 300MHz, such as f89 = 350MHz, f89 = 500MHz, f89 = 600MHz, f89 = 700MHz, or f89 = 1000MHz, etc.

[0182] Figure 7c This is a schematic diagram of another antenna distribution structure for a mobile terminal in a folded state, as provided in an embodiment of this application. (Compared to the above...) Figure 7a The mobile terminal shown has different placement positions for each radiator. Figure 7b In this design, the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3. When the satellite antenna is in operation, the resonant frequency of the ninth resonance generated by the third radiator 8 is within the third communication frequency band of the satellite antenna, while the seventh and eighth frequencies are both higher than the third communication frequency band. By employing this design in the mobile terminal's antenna system, the reduction in radiation efficiency of the satellite antenna caused by folding the third housing 3 can still be mitigated by making the current distribution of the second radiator 7 similar to that of the third radiator 8, thus ensuring that the satellite antenna can still meet certain communication requirements.

[0183] In the above embodiments of this application, when the mobile terminal is in each folded state, the frequency corresponding to the first resonant structure and the frequency corresponding to the second resonant structure both change with the resonant point frequency of the third radiator 8. The frequency corresponding to the first resonant structure is controlled by the branch of the first tuning circuit connected to the first radiator 6, and the frequency corresponding to the second resonant structure is controlled by the branch of the second tuning circuit connected to the second radiator 7.

[0184] Based on this, in one possible embodiment of this application, the mobile terminal has at least two folding states, such as the flattened state, the hovering state, and the folded state mentioned above. For any two folding states, when the satellite antenna is in the working state, the first radiator 6 can be connected to different branches of the first tuning circuit, and the second radiator 7 can be connected to different branches of the second tuning circuit. For example, when the mobile terminal is in the flattened state, the first radiator 6 is connected to the first branch of the first tuning circuit, and the second radiator 7 is connected to the first branch of the second tuning circuit; when the mobile terminal is in the hovering state, the first radiator 6 is connected to the second branch of the first tuning circuit, and the second radiator 7 is connected to the second branch of the second tuning circuit; and when the mobile terminal is in the folded state, the first radiator 6 is connected to the third branch of the first tuning circuit, and the second radiator 7 is connected to the third branch of the second tuning circuit. This allows the frequencies corresponding to the two resonant structures to meet the usage requirements of the mobile terminal in different folding states, thereby allowing the two resonant structures to influence the resonant mode of the resonance generated by the third radiator 8, thereby optimizing the radiation pattern of the satellite antenna and improving the communication performance of the satellite antenna.

[0185] Additionally, it is understandable that when the mobile terminal is in the same folded state but the three radiators are positioned differently, the first radiator 6 can be connected to different branches of the first tuning circuit, and the second radiator 7 can be connected to different branches of the second tuning circuit, so that the frequencies corresponding to the two resonant structures satisfy the relationship with the resonant frequency of the resonance generated by the third radiator 8, thereby improving the radiation efficiency of the satellite antenna.

[0186] In another possible embodiment of this application, when the mobile terminal is in different folded states, the first radiator 6 can also be connected to the same branch of the first tuning circuit. For example, the first radiator 6 can be connected to a branch that ensures the resonant frequency f of the first radiator 6 satisfies: 2500MHz ≤ f ≤ 2700MHz, so that the first radiator 6 operates within the aforementioned fixed operating frequency band when the mobile terminal is in various folded states. This satisfies the satellite communication requirements of the mobile terminal in different folded states while also simplifying the antenna system.

[0187] Furthermore, considering the communication process between the satellite antenna and the communication satellite, which involves the satellite antenna receiving and transmitting electromagnetic waves, and given that the frequencies of electromagnetic waves that the satellite antenna can receive differ from the frequencies of the electromagnetic waves it can transmit, in one possible embodiment of this application, when the satellite antenna is in the transmitting state, the first radiator 6 can be connected to the first branch of the first tuning circuit. When the satellite antenna is in the receiving state, the first radiator 6 can be connected to the second branch of the first tuning circuit. This allows the frequency corresponding to the first resonant structure to be adjusted accordingly through the corresponding branches of the first tuning circuit when the satellite antenna is in the transmitting and receiving states, thereby satisfying the communication requirements of the satellite antenna while also improving the intelligence of the antenna system.

[0188] In another possible embodiment of this application, when the satellite antenna is in transmitting or receiving mode, the first radiator 6 can also be connected to the same branch of the first tuning circuit. That is, regardless of whether the satellite antenna is in transmitting or receiving mode, the first resonant structure corresponds to the same frequency, for example, the first resonant structure corresponds to a frequency within the 2500MHz~2700MHz frequency band. This can meet the satellite communication requirements of the mobile terminal while also simplifying the antenna system.

[0189] As described above, the first radiator 6 can always be connected to the same branch of the first tuning circuit. This not only meets the satellite communication requirements of the antenna system but also the cellular communication requirements, thereby improving the utilization rate of the branch of the first tuning circuit.

[0190] In one possible embodiment of this application, when the satellite antenna is in a non-operating state, the first radiator 6 is coupled to the first antenna radio frequency link and used to generate a first resonance. The resonant frequency of the first resonance is within the communication frequency band of the first antenna. In practical applications, the first antenna radio frequency link can be a cellular radio frequency link. In this case, when the satellite antenna is in a non-operating state, the first radiator 6 is used as a radiator of a cellular antenna for cellular communication.

[0191] It is worth mentioning that, since the first radiator 6 can form a resonant structure with the first tuning circuit when the satellite antenna is in the working state, thus influencing the radiation pattern of the satellite antenna, in one possible embodiment, the frequency corresponding to the first resonant structure when the satellite antenna is in the working state can be the same as the resonant frequency of the first resonance generated by the first radiator 6 when the satellite antenna is in the non-working state. This allows for the reuse of cellular antennas, thereby simplifying the antenna system.

[0192] In practical applications, since the cellular antenna operates in a B41 state, when the satellite antenna is not in operation, the first radiator 6 can be connected to a branch of the first tuning circuit to tune the resonant frequency of the first resonance generated by the first radiator 6 to the frequency band corresponding to the B41 state. When the satellite antenna is in operation, the first radiator 6 can still be connected to the same branch of the first tuning circuit to ensure that the frequency corresponding to the first resonant structure falls within the frequency band corresponding to the B41 state.

[0193] It is understood that the first radiator 6 can also be used for other antennas and can generate target resonances corresponding to the target frequencies of other antennas. When the first radiator 6 is used as the first resonant structure, it is sufficient that the target resonance satisfies the description of the first resonant structure in the above embodiments of this application.

[0194] Furthermore, in this application, when the mobile terminal is in a closed state and the satellite antenna is not working, the resonant frequency of the third radiator 8 can be greater than the resonant frequency of the resonance generated by the first radiator 6, and the resonant frequency of the resonance generated by the second radiator 7 can be greater than the resonant frequency of the first radiator 6. In other words, when the mobile terminal is in a closed state and the satellite antenna is not working, both the second radiator 7 and the third radiator 8 can act as parasitic radiators of the first radiator 6, thereby improving the cellular communication performance of the antenna system.

[0195] It is understood that in this application, the mobile terminal can also control the state of the first tuning circuit via a cellular radio frequency link, thereby causing the first radiator 6 to resonate accordingly. Additionally, the mobile terminal can control the state of the second tuning circuit via a cellular radio frequency link or a satellite link, thereby causing the second radiator 7 to resonate accordingly.

[0196] As described above, the different branches of the first tuning circuit can be understood as the first tuning circuit having different conduction states, and each conduction state can be considered as a branch of the first tuning circuit. In this application, a switching assembly can be used to switch between the different branches of the first tuning circuit. Similarly, the different branches of the second tuning circuit can also be switched using a switching assembly. For specific design details, please refer to... Figure 8 , Figure 8 This is another schematic diagram of the antenna system provided in this application when the mobile terminal is in a flattened state. In this embodiment, the first radiator 6 is disposed in the first housing 1, the third radiator 8 is disposed in the second housing 2, and the second radiator 7 is disposed in the third housing 3. Additionally, the first tuning circuit further includes a first switching assembly 10, and the second tuning circuit further includes a second switching assembly 11. The first switching assembly includes a first switching device SW1 and a second switching device SW2, and the second switching assembly includes a third switching device SW3 and a fourth switching device SW4.

[0197] Furthermore, since the resonant frequency of the third radiator 8 differs depending on the folded state of the mobile terminal, the satellite antenna also includes a third switch assembly 12, which is coupled to the third radiator 8, so that the resonant frequency of the third radiator 8 can be adjusted according to the communication requirements under different folded states. Figure 8 As shown, the third switching assembly 12 includes a fifth switching device SW5 and a sixth switching device SW6.

[0198] In this embodiment, the mobile terminal can, but is not limited to, control the on and off states of the third switch component 12 via a cellular radio frequency link. Furthermore, when the third switch component 12 is in the on state, the satellite radio frequency link can control the on state of the third switch component 12 via a first feed point to switch the satellite antenna between receive and transmit states. For example, when the third switch component 12 is in the first on state, the satellite antenna is in receive state; and when the third switch component 12 is in the second on state, the satellite antenna is in transmit state.

[0199] Understandably, in practical applications, the switching states of the switching devices in each component can be adjusted to connect each radiator to different circuit branches, thereby causing each radiator to resonate accordingly.

[0200] It is worth mentioning that, such as Figure 8 As shown in this embodiment of the application, the switching device with an inductor connected in parallel with the ground in each switching assembly can be used to increase the resonant frequency of the radiator, while the switching device with a gap capacitor can be used to decrease the resonant frequency of the radiator. In other embodiments of the application, each switching assembly can also adopt other possible design forms to achieve the function of correspondingly adjusting the resonant frequency of the radiator. These are not listed here, but they should all be understood to fall within the protection scope of this application.

[0201] In addition, in the aforementioned switching devices, the slit capacitors, such as the first capacitor C1 in the third switching device S3 and the second capacitor C2 in the fifth switching device S5, can also increase the radiation aperture to improve the gain of the satellite antenna, thereby increasing the beamwidth of the radiation pattern.

[0202] In a specific embodiment, in Figure 8In the flattened state shown, when the first switching device SW1, the second switching device SW2, the third switching device SW3, the fourth switching device SW4, the fifth switching device SW5, and the sixth switching device SW6 are all in the first state, the satellite antenna is in the transmitting state. At this time, the resonant frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the transmitting state. The first switching component 10 modulates the frequency corresponding to the first resonant structure to the 2500MHz~2700MHz operating frequency band, and the second switching component 11 modulates the frequency corresponding to the second resonant structure to a position higher than the aforementioned communication frequency band.

[0203] Figure 9 Provided for the embodiments of this application Figure 8 The diagram shows the radiation pattern of the mobile terminal's satellite antenna when it is in transmit mode. Figure 9 It can be seen that by adopting the antenna system design scheme provided in this application, the beam angle α of the satellite antenna pattern of the mobile terminal can reach more than 15°, that is, the beam width of the pattern can reach more than ±15°, for example, ±20° or even ±30°, which can meet the satellite communication requirements of the mobile terminal in the flat state.

[0204] You can continue to refer to Figure 8 When the first switching device SW1, the second switching device SW2, the third switching device SW3, the fourth switching device SW4, the fifth switching device SW5, and the sixth switching device SW6 are all in the second state, the satellite antenna is in the receiving state. At this time, the resonant frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the receiving state. The first switching component 10 modulates the frequency corresponding to the first resonant structure to the 2500MHz~2700MHz operating frequency band, and the second switching component 11 modulates the frequency corresponding to the second resonant structure to a position higher than the above-mentioned communication frequency band.

[0205] In addition, it has been verified that when the satellite antenna is in receiving mode, its beam angle α can reach more than 15°, which can still meet the satellite communication requirements of mobile terminals in the flat state.

[0206] In addition, when the mobile terminal is in such a state Figure 6aThe satellite antenna is in a transmitting state when, as shown, the first radiator 6 is disposed in the first housing 1, the third radiator 8 is disposed in the second housing 2, and the second radiator 7 is disposed in the third housing 3. When the first switching device SW1, the second switching device SW2, the third switching device SW3, the fourth switching device SW4, the fifth switching device SW5, and the sixth switching device SW6 are all in the third state, the satellite antenna is in a transmitting state. At this time, the resonant frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the transmitting state. The first switching assembly 10 modulates the frequency corresponding to the first resonant structure to the 2500MHz~2700MHz operating frequency band, and the second switching assembly 11 modulates the frequency corresponding to the second resonant structure to a position higher than the aforementioned communication frequency band.

[0207] Figure 10 Provided for the embodiments of this application Figure 6a This is a schematic diagram of the radiation pattern of the satellite antenna of the mobile terminal when it is in transmit mode. Figure 10 It can be seen that, by adopting the antenna system design scheme provided in this application, when the mobile terminal is in a hovering state, the beam angle α of the satellite antenna pattern can reach more than 15°, that is, the beam width of the pattern can reach more than ±15°, for example, ±20°, or even ±30°, which can meet the satellite communication requirements of the mobile terminal in a hovering state.

[0208] Furthermore, when the first switching device SW1, the second switching device SW2, the third switching device SW3, the fourth switching device SW4, the fifth switching device SW5, and the sixth switching device SW6 are all in the fourth state, the satellite antenna is in the receiving state. At this time, the resonant frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the receiving state. The first switching assembly 10 modulates the frequency corresponding to the first resonant structure to the 2500MHz~2700MHz operating frequency band, and the second switching assembly 11 modulates the frequency corresponding to the second resonant structure to the aforementioned communication frequency band.

[0209] It has been verified that when the mobile terminal is in a hovering state and the satellite antenna is in a receiving state, the beam angle α of its radiation pattern can reach more than 15°, which can meet the satellite communication requirements of the mobile terminal in a hovering state.

[0210] For example, in mobile terminals, such as Figure 7aWhen the satellite antenna is in the folded state shown, with the first radiator 6 disposed in the first housing 1, the third radiator 8 disposed in the second housing 2, and the second radiator 7 disposed in the third housing 3, and the first switching device SW1, the second switching device SW2, the third switching device SW3, the fourth switching device SW4, the fifth switching device SW5, and the sixth switching device SW6 are all in the fifth state, the satellite antenna is in the transmitting state. At this time, the resonant frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the transmitting state. The first switching assembly 10 modulates the frequency corresponding to the first resonant structure to the 2500MHz~2700MHz operating frequency band, and the second switching assembly 11 modulates the frequency corresponding to the second resonant structure to the aforementioned communication frequency band.

[0211] Figure 11 Provided for the embodiments of this application Figure 7a This is a schematic diagram of the radiation pattern of the satellite antenna of the mobile terminal when it is in transmit mode. Figure 11 It can be seen that, by adopting the antenna system design scheme provided in this application, when the mobile terminal is in a folded state, the beam angle α of the satellite antenna pattern can also meet the regulatory requirements, and its beamwidth can reach, for example, ±15°, which can meet the satellite communication requirements of the mobile terminal in a hovering state.

[0212] Furthermore, when the first switching device SW1, the second switching device SW2, the third switching device SW3, the fourth switching device SW4, the fifth switching device SW5, and the sixth switching device SW6 are all in the sixth state, the satellite antenna is in the receiving state. At this time, the resonant frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the receiving state. The first switching assembly 10 modulates the frequency corresponding to the first resonant structure to the 2500MHz~2700MHz operating frequency band, and the second switching assembly 11 modulates the frequency corresponding to the second resonant structure to the aforementioned communication frequency band.

[0213] It has been verified that when the mobile terminal is in a folded state and the satellite antenna is in a receiving state, the beam angle α of its radiation pattern can reach 15°, which can meet the satellite communication requirements of the mobile terminal in a folded state.

[0214] In summary, the antenna system of the mobile terminal provided in this application embodiment can adjust the frequency corresponding to the first resonant structure formed by the first tuning circuit and the first radiator, and the frequency corresponding to the second resonant structure formed by the second tuning circuit and the second radiator, according to the folded state of the mobile terminal, the setting position of each radiator, and the working state of the satellite antenna. This allows the first and second resonant structures to influence the resonant mode of the third radiator, enabling the satellite antenna to generate a target radiation pattern. This is beneficial for optimizing the radiation pattern of the satellite antenna, thereby improving the radiation efficiency of the satellite antenna.

[0215] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mobile terminal, characterized in that, The system includes a first housing (1), a second housing (2), a third housing (3), a rotating shaft mechanism (4; 5), and an antenna system. The first housing (1), the second housing (2), and the third housing (3) are rotatably connected via the rotating shaft mechanism (4; 5), wherein: The antenna system includes a satellite antenna, which includes a satellite radio frequency link, a first feed point (9), a first radiator (6), a second radiator (7), a third radiator (8), a first tuning circuit, and a second tuning circuit. The first radiator (6) is coupled to the first tuning circuit; the second radiator (7) is coupled to the second tuning circuit; the third radiator (8) is coupled to the satellite radio frequency link through the first feed point (9); the first radiator (6), the second radiator (7), and the third radiator (8) are respectively disposed in different housings; and along the axial direction of the mobile terminal, the first radiator (6), the second radiator (7), and the third radiator (8) are located at one end of the mobile terminal. The mobile terminal is in a flattened state and the satellite antenna is in a working state. The first radiator (6) and the first tuning circuit, the second radiator (7) and the second tuning circuit, and the third radiator (8) are used to jointly generate the target radiation pattern of the satellite antenna. The antenna system further includes a cellular radio frequency link. The first radiator includes a second feed point. When the satellite antenna is in a non-operating state, the first radiator is coupled to the cellular radio frequency link through the second feed point and is used to generate a first resonance. The resonant frequency of the first resonance is within the communication frequency band of the cellular antenna.

2. The mobile terminal as described in claim 1, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The third radiator (8) is disposed in the second housing (2). The first radiator (6) is coupled to the ground through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance. The first frequency and the resonant point frequency of the third resonance are within the first communication frequency band of the satellite antenna. The second frequency is higher than the first communication frequency band.

3. The mobile terminal as described in claim 1, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The third radiator (8) is disposed on the second housing (2). The first radiator (6) is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance, wherein the frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonance satisfies: f13 ≤ 10%. f3, the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3.

4. The mobile terminal as described in claim 3, characterized in that, The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: 0 ≤ f13 ≤ 100MHz; the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 100MHz.

5. The mobile terminal as described in claim 1, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The third radiator (8) is disposed in the second housing (2). The first radiator (6) is coupled to the ground through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance. The resonant frequency of the third resonance is within the first communication frequency band of the satellite antenna. The first frequency is higher than the first communication frequency band, and the second frequency is higher than the first communication frequency band.

6. The mobile terminal as described in claim 5, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The third radiator (8) is disposed on the second housing (2). The first radiator (6) is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance, wherein the frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonance satisfies: f13 > 10%. f3, the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3.

7. The mobile terminal as described in claim 6, characterized in that, The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: f13 > 100MHz; the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 100MHz.

8. The mobile terminal as described in claim 1, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The first radiator (6) is disposed in the first housing (1), the second radiator (7) is disposed in the second housing (2), and the third radiator (8) is disposed in the third housing (3). The first radiator (6) is coupled to the ground through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance. The resonant frequency of the third resonance is within the first communication frequency band of the satellite antenna. The first frequency is higher than the first communication frequency band, and the second frequency is higher than the first communication frequency band.

9. The mobile terminal as described in claim 1, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The third radiator (8) is disposed on the second housing (2). The first radiator (6) is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance, wherein the frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonance satisfies: f13 > 10%. f3, the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3.

10. The mobile terminal as described in claim 9, characterized in that, The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: f13 > 100MHz, and the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 100MHz.

11. The mobile terminal as described in claim 1, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The first radiator (6) is disposed in the first housing (1), the second radiator (7) is disposed in the second housing (2), and the third radiator (8) is disposed in the third housing (3). The first radiator (6) is coupled to the ground through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance. The first frequency and the resonant point frequency of the third resonance are within the first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band.

12. The mobile terminal as described in claim 1, characterized in that, The mobile terminal is in the flattened state, and the satellite antenna is in the working state. The first radiator (6) is disposed in the first housing (1), the second radiator (7) is disposed in the second housing (2), and the third radiator (8) is disposed in the third housing (3). The first radiator (6) is coupled to the ground plane through a branch of the first tuning circuit to form a first resonant structure, which corresponds to a first frequency. The second radiator (7) is coupled to the ground plane through a branch of the second tuning circuit to form a second resonant structure, which corresponds to a second frequency. The third radiator (8) is used to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonance satisfies: f13 ≤ 10%. f3, the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 10%. f3.

13. The mobile terminal as described in claim 12, characterized in that, The frequency difference f13 between the first frequency f1 and the resonant frequency f3 of the third resonance satisfies: 0 ≤ f13 ≤ 100MHz, and the frequency difference f23 between the second frequency f2 and the resonant frequency f3 of the third resonance satisfies: f23 > 100MHz.

14. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) includes a third support surface (301) for supporting the flexible display screen (200). The first support surface (101) and the second support surface (201) are coplanar, the third support surface (301) intersects with the second support surface (201), and the satellite antenna is in the working state. The third radiator (8) is disposed on the second housing (2). The first radiator (6) is coupled to the ground through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency. The second radiator (7) is coupled to the ground through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency. The third radiator (8) is used to generate a sixth resonance. The fifth frequency and the resonant point frequency of the sixth resonance are within the second communication frequency band of the satellite antenna. The fourth frequency is higher than the second communication frequency band.

15. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) includes a third support surface (301) for supporting the flexible display screen (200). The first support surface (101) and the second support surface (201) are coplanar, the third support surface (301) intersects with the second support surface (201), and the satellite antenna is in the operating state. The third radiator (8) is disposed on the second housing (2). The first radiator (6) is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency. The second radiator (7) is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency. The third radiator (8) is used to generate a sixth resonance, wherein the frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46 > 10%. The frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f3.

16. The mobile terminal as described in claim 15, characterized in that, The frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance satisfies: f46 > 100MHz; the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f56 ≤ 100MHz.

17. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) includes a third support surface (301) for supporting the flexible display screen (200). The first support surface (101) and the second support surface (201) are coplanar, the third support surface (301) intersects with the second support surface (201), and the satellite antenna is in the working state. The first radiator (6) is disposed on the first housing (1), the second radiator (7) is disposed on the second housing (2), and the third radiator (8) is disposed on the third housing (3). The first radiator (6) is coupled to the ground through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency. The second radiator (7) is coupled to the ground through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency. The third radiator (8) is used to generate a sixth resonance. The resonant point frequencies of the fifth and sixth resonances are within the second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band.

18. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing 3 includes a third support surface (301) for supporting the flexible display screen (200). The first support surface (101) and the second support surface (201) are coplanar, the third support surface (301) intersects with the second support surface (201), and the satellite antenna is in the working state. The first radiator (6) is disposed on the first housing (1), the second radiator (7) is disposed on the second housing (2), and the third radiator (8) is disposed on the third housing (3). The first radiator (6) is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, corresponding to a fourth frequency. The second radiator (7) is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, corresponding to a fifth frequency. The third radiator (8) is used to generate a sixth resonance. The frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46 > 10%. The frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f6.

19. The mobile terminal as described in claim 18, characterized in that, The frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance satisfies: f46 > 100MHz, and the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f56 ≤ 100MHz.

20. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing 3 includes a third support surface (301) for supporting the flexible display screen (200). The first support surface (101) and the second support surface (201) are coplanar, the third support surface (301) intersects with the second support surface (201), and the satellite antenna is in the working state. The first radiator (6) is disposed on the first housing (1), the second radiator (7) is disposed on the second housing (2), and the third radiator (8) is disposed on the third housing (3). The first radiator (6) is coupled to the ground through another branch of the first tuning circuit to form a fourth resonant structure, which corresponds to a fourth frequency. The second radiator (7) is coupled to the ground through another branch of the second tuning circuit to form a fifth resonant structure, which corresponds to a fifth frequency. The third radiator (8) is used to generate a sixth resonance. The resonant point frequencies of the fourth frequency, the fifth frequency, and the sixth resonance are all within the second communication frequency band of the satellite antenna.

21. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing 3 includes a third support surface (301) for supporting the flexible display screen (200). The first support surface (101) and the second support surface (201) are coplanar, the third support surface (301) intersects with the second support surface (201), and the satellite antenna is in the working state. The first radiator (6) is disposed on the first housing (1), the second radiator (7) is disposed on the second housing (2), and the third radiator (8) is disposed on the third housing (3). The first radiator (6) is coupled to the ground plane through another branch of the first tuning circuit to form a fourth resonant structure, corresponding to a fourth frequency. The second radiator (7) is coupled to the ground plane through another branch of the second tuning circuit to form a fifth resonant structure, corresponding to a fifth frequency. The third radiator (8) is used to generate a sixth resonance. The frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46 ≤ 10%. The frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: f56 ≤ 10%. f6.

22. The mobile terminal as described in claim 21, characterized in that, The frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f46 ≤ 100 MHz, and the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies: 0 ≤ f56 ≤ 100 MHz.

23. The mobile terminal as described in claim 14, characterized in that, The included angle α between the third support surface and the second support surface satisfies: 45°≤α≤135°.

24. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) includes a third support surface (301) for supporting the flexible display screen (200). With the first support surface (101) and the second support surface (201) coplanar, and the third support surface (301) opposite to the second support surface (201), and the satellite antenna in the operating state, the first radiator (6) is coupled to the ground through another branch of the first tuning circuit to form a seventh resonant structure, the seventh resonant structure corresponding to a seventh frequency, the second radiator (7) is coupled to the ground through another branch of the second tuning circuit to form an eighth resonant structure, the eighth resonant structure corresponding to an eighth frequency, and the third radiator (8) is used to generate a ninth resonance, wherein the resonant point frequency of the ninth resonance is within the third communication frequency band of the satellite antenna, the seventh frequency is higher than the third communication frequency band, and the eighth frequency is higher than the third communication frequency band.

25. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first housing (1) includes a first support surface (101) for supporting the flexible display screen (200), the second housing (2) includes a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) includes a third support surface (301) for supporting the flexible display screen (200). With the first support surface (101) and the second support surface (201) coplanar, and the third support surface (301) opposite to the second support surface (201), and the satellite antenna in the operating state, the first radiator (6) is coupled to the ground plane through another branch of the first tuning circuit to form a seventh resonant structure, the seventh resonant structure corresponding to a seventh frequency; the second radiator (7) is coupled to the ground plane through another branch of the second tuning circuit to form an eighth resonant structure, the eighth resonant structure corresponding to an eighth frequency; and the third radiator (8) is used to generate a ninth resonance, wherein the frequency difference f79 between the seventh frequency f7 and the resonant point frequency f9 of the ninth resonance satisfies: f79 > 10%. The frequency difference f89 between the eighth frequency f8 and the resonant frequency f9 of the ninth resonance satisfies: f89 > 10%. f9.

26. The mobile terminal as described in claim 25, characterized in that, The frequency difference f79 between the seventh frequency f7 and the resonant frequency f9 of the ninth resonance satisfies: f79 > 100MHz, and the frequency difference f89 between the eighth frequency f8 and the resonant frequency f9 of the ninth resonance satisfies: f89 > 100MHz.

27. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The first radiator (6) is disposed on the first housing (1), the second radiator (7) is disposed on the third housing (3), the third radiator (8) is disposed on the second housing (2), and the distance between the first feed point (9) and the axis of the first rotating shaft mechanism (4) between the first housing (1) and the second housing (2) is greater than the distance between the first feed point (9) and the axis of the second rotating shaft mechanism (5) between the second housing (2) and the third housing (3).

28. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The satellite antenna also includes a third switch assembly (12), which is coupled to the third radiator (8); When the third switch assembly (12) is in the first conducting state, the satellite antenna is in the transmitting state; when the third switch assembly (12) is in the second conducting state, the satellite antenna is in the receiving state.

29. The mobile terminal as described in claim 28, characterized in that, When the satellite antenna is in the transmitting state, the first radiator (6) is connected to the first branch of the first tuning circuit; When the satellite antenna is in receiving mode, the first radiator (6) is connected to the second branch of the first tuning circuit.

30. The mobile terminal as described in claim 29, characterized in that, When the satellite antenna is in the transmitting state or the receiving state, the first radiator is connected to the same branch of the first tuning circuit.

31. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The mobile terminal has at least two folded states. In any two of the folded states, and when the satellite antenna is in the working state, the first radiator is connected to different branches of the first tuning circuit, and the second radiator is connected to different branches of the second tuning circuit.

32. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The mobile terminal is in different folded states, and the satellite antenna is in the working state. The first radiator is connected to the same branch of the first tuning circuit, and the second radiator is connected to the same branch of the second tuning circuit.

33. The mobile terminal as described in claim 1, characterized in that, The resonant frequency f of the first radiator satisfies: 2500MHz≤f≤2700MHz.

34. The mobile terminal as described in claim 33, characterized in that, The mobile terminal controls the state of the first tuning circuit through the cellular radio frequency link.

35. The mobile terminal as described in any one of claims 1 to 13, characterized in that, The mobile terminal controls the state of the second tuning circuit via the cellular radio frequency link or the satellite radio frequency link.

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