Mobile terminal

Abstract

The utility model provides a mobile terminal. The mobile terminal comprises three shells and an antenna system, wherein the three shells are sequentially and rotatably connected. The antenna system comprises a satellite antenna, the satellite antenna comprises a satellite radio frequency link, a first radiator, a second radiator, a third radiator, a first tuning circuit and a second tuning circuit, and the satellite radio frequency link is coupled with the third radiator. The first radiator, the second radiator and the third radiator are respectively arranged in different shells, 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 adopting the scheme, when the satellite antenna is in a working state, the first radiating body and the first tuning circuit as well as the second radiating body and the second tuning circuit as well as the third radiating body can be utilized to jointly generate the target directional diagram of the satellite antenna, so that the optimization of the directional diagram of the satellite antenna and / or the gain of the satellite antenna is facilitated; therefore, the communication performance of the satellite antenna can be improved.

Description

[0001] This utility model claims priority to the Chinese patent application filed with the Intellectual Property Office of the People's Republic of China on May 7, 2024, with application number 202410555767.4 and invention name "A folding terminal device", the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The utility model relates to the technical field of communications, and in particular to a mobile terminal. Background Art

[0003] With the development of human society, mobile devices such as mobile phones have become indispensable tools in people's lives. People's dependence on mobile devices has affected every aspect of their lives. With the rise of technology that allows mobile terminals to communicate via communication satellites, people are increasingly demanding the practical use of communication satellites for mobile terminals.

[0004] To achieve communication via satellite communications, a connection must first be established between the mobile terminal's satellite antenna and the satellite. The satellite antenna's directional pattern is one of the factors that influences the speed and stability of the communication connection. Different mobile terminal forms, such as candy-bar and foldable devices, and foldable devices in different folded configurations, typically have different floor dimensions, which affect the directional pattern differently. Therefore, by analyzing the directional patterns of satellite antennas for mobile terminals with different floor dimensions, we can design satellite antennas to improve the mobile terminal's satellite communication performance. Utility Model Content

[0005] The utility model provides a mobile terminal, which is used to improve the satellite communication performance of the mobile terminal.

[0006] The mobile terminal provided by the present invention includes a first housing, a second housing, a third housing, a first hinge mechanism, a second hinge mechanism, and an antenna system. The first housing and the second housing are rotatably connected via the first hinge mechanism, and the second housing and the third housing are rotatably connected via the second hinge 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 disposed in different housings. Furthermore, 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 by the present invention, when the satellite antenna is in operation, the first radiator and the first tuning circuit, the second radiator and the second tuning circuit, and the third radiator are used to collectively generate a target radiation pattern for the satellite antenna. In this way, a resonant structure can be formed by the first tuning circuit and the first radiator, and another resonant structure can be formed by the second tuning circuit and the second radiator, so that the two resonant structures can be used to influence the resonant mode of the resonance generated by the third radiator, so as to achieve the purpose of adjusting the target radiation pattern of the satellite antenna and / or improving the gain of the satellite antenna, thereby improving the communication performance of the satellite antenna.

[0007] By adopting the design of the antenna system provided by the present invention, 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 folding 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.

[0008] Specifically, when the mobile terminal is in a flattened state and the third radiator is disposed within the second housing, if the satellite antenna is in operation, the first radiator is coupled to the floor via a branch of the first tuning circuit and is used to generate a first resonance. The second radiator is coupled to the floor via a branch of the second tuning circuit to form a first resonant structure, which corresponds to a first frequency. Furthermore, the third radiator is used to generate a third resonance. The resonant point frequencies of the first and third frequencies are within the first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band. This coupling between the first and third radiators allows the current of the third radiator to flow toward the first radiator and then to the ground, thereby curbing the current of the third radiator and tilting the satellite antenna's radiation pattern toward 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 toward the second radiator and, in turn, toward the floor. Since the floor size of the mobile terminal is large in the flattened state, the current on the floor can flow in the direction of the frame and the floor in a traveling wave state to generate an orthogonal polarization radiation field, thereby enhancing the circular polarization gain of the satellite antenna. This is beneficial to increase the beam width of the radiation pattern to meet the satellite antenna's star-pointing requirements, thereby improving the communication performance of the satellite antenna.

[0009] In practical applications, when the mobile terminal is flattened and the third radiator is disposed within the second housing, if the satellite antenna is in operation, the first radiator is coupled to the floor via 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 floor via a branch of the second tuning circuit to form a second resonant structure corresponding to a second frequency. The third radiator is configured to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonance can satisfy the following conditions: f13 ≤ 10% * f3, thereby suppressing the current flowing through the third radiator through the coupling between the first and third radiators. Furthermore, the frequency difference f23 between the second frequency f2 and the resonant point frequency f3 of the third resonance can satisfy the following conditions: f23 > 10% * f3, thereby enabling the coupling between the second and third radiators to generate orthogonally polarized radiation fields from the floor current and the current flowing between the second and third radiators, thereby enhancing the circular polarization gain of the satellite antenna.

[0010] In one possible implementation, the frequency difference f13 between the first frequency f1 and the third resonance frequency f3 satisfies: 0≤f13≤100 MHz. In addition, the frequency difference f23 between the second frequency f2 and the third resonance frequency f3 satisfies: f23>100 MHz.

[0011] In another possible implementation of the present invention, when the mobile terminal is in a flattened state and the third radiator is arranged in the second shell, if the satellite antenna is in an operating state, the first radiator is coupled to the floor through a branch of the first tuning circuit and is used to generate a first resonance. The second radiator is coupled to the floor through a branch of the second tuning circuit to form a first resonant structure, and the first resonant structure corresponds to the first frequency. In addition, the third radiator is used to generate a third resonance. The resonant point 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. In this way, the circular polarization gain of the satellite antenna can be enhanced through the orthogonal polarization radiation field generated by the floor and the frame radiator, thereby improving the communication performance of the satellite antenna.

[0012] In actual 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 floor via a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency. The second radiator is coupled to the floor via a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency. The third radiator is configured 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 the following: f13 > 10% * f3, so that the coupling between the first radiator and the third radiator causes the floor current and the current between the first radiator and the third radiator to generate an orthogonally polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In addition, the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3, so that the floor current and the first radiator and the third radiator generate orthogonal polarization radiation fields through coupling between the second radiator and the third radiator, thereby enhancing the circular polarization gain of the satellite antenna.

[0013] In a possible implementation, a frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies: f13>100 MHz; a frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>100 MHz.

[0014] In another possible implementation of the present invention, when the mobile terminal is in a flattened state, 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 third housing, if the satellite antenna is in operation, the first radiator may be coupled to the floor via a branch of the first tuning circuit to form a first resonant structure corresponding to a first frequency; the second radiator may be coupled to the floor via a branch of the second tuning circuit to form a second resonant structure corresponding to a second frequency. Furthermore, the third radiator is configured to generate a third resonance. The resonant point frequency of the third resonance is within the first communication frequency band of the satellite antenna, with the first frequency being higher than the first communication frequency band, and the second frequency being higher than the first communication frequency band. This allows the first resonant structure formed by the first radiator via the first tuning circuit and the second resonant structure formed by the second radiator via the second tuning circuit to both significantly influence the resonant mode of the resonance generated by the third radiator, thereby adjusting the satellite antenna's directivity pattern and circular polarization gain, thereby improving the satellite antenna's communication performance.

[0015] In practical applications, when the mobile terminal is flattened 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 operation, the first radiator can be coupled to the floor via 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 floor via a branch of the second tuning circuit to form a second resonant structure corresponding to a second frequency. Furthermore, the third radiator is configured 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 the following: f13 > 10% * f3, so that the current between the first and third radiators and the floor current generate orthogonal polarization radiation fields, thereby enhancing the circular polarization gain of the satellite antenna. The frequency difference f23 between the second frequency f2 and the resonant point frequency f3 of the third resonance satisfies the following: f23 > 10% * f3, so that the circuit between the second and third radiators and the floor current generate orthogonal polarization radiation fields, thereby enhancing the circular polarization gain of the satellite antenna.

[0016] In one possible implementation, a frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: f13>100 MHz. In addition, a frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23>100 MHz.

[0017] In one possible embodiment of the present invention, when the mobile terminal is in a flattened state, and the first radiator is disposed in the first shell, the second radiator is disposed in the second shell, and the third radiator is disposed in the third shell, if the satellite antenna is in operation, the first radiator is coupled to the floor via a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency. The second radiator is coupled to the floor via a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency. The third radiator is used to generate a third resonance, wherein the resonant point frequencies of the first frequency and 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 the maximum radiation direction of the satellite antenna's directional pattern to be adjusted while improving the circular polarization gain of the satellite antenna.

[0018] In actual applications, when the mobile terminal is flattened 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 operation, the first radiator can be coupled to the floor via a branch of the first tuning circuit to form a first resonant structure corresponding to the first frequency; the second radiator can be coupled to the floor via a branch of the second tuning circuit to form a second resonant structure corresponding to the second frequency. Furthermore, the third radiator is configured 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 the following: f13 ≤ 10% * f3. This allows the coupling between the first and third radiators to curb the current of the third radiator, thereby adjusting the maximum radiation direction of the pattern. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3, so that the floor current and the current between the second radiator and the third radiator generate an orthogonal polarization radiation field through coupling between the second radiator and the third radiator, thereby enhancing the circular polarization gain of the satellite antenna.

[0019] In one possible implementation, a frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: 0≤f13≤100 MHz. In addition, a frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23>100 MHz.

[0020] In the mobile terminal provided by the present invention, a first housing includes a first support surface for supporting a flexible display screen, a second housing includes a second support surface for supporting the flexible display screen, and a 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 the second support surface, and a third radiator is disposed in the second housing, that is, when the mobile terminal is in a hovering state, if the satellite antenna is in operation, the first radiator is coupled to the floor via another branch of the first tuning circuit to form a fourth resonant structure corresponding to a fourth frequency; the second radiator is coupled to the floor via another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency; and the third radiator is configured to generate a sixth resonance. The resonant point frequencies of the fifth and sixth frequencies 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 the large size of the floor, the current of the satellite antenna can be vertically distributed on the floor, thereby achieving circular polarization, which is beneficial for improving the performance of the satellite antenna.

[0021] In practical applications, the first housing includes a first support surface for supporting the flexible display, the second housing includes a second support surface for supporting the flexible display, and the third housing includes a third support surface for supporting the flexible display. When the first and second support surfaces are coplanar, the third support surface intersects the second support surface, and the third radiator is disposed in the second housing, that is, when the mobile terminal is in a hovering state, if the satellite antenna is in operation, the first radiator is coupled to the floor via another branch of the first tuning circuit to form a fourth resonant structure corresponding to a fourth frequency; the second radiator is coupled to the floor via another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency; and the third radiator is configured to generate a sixth resonance, wherein the frequency difference f46 between the resonant point frequency f4 of the fourth resonance and the resonant point frequency f6 of the sixth resonance satisfies the following: f46>10%*f6. This allows coupling between the first radiator and the third radiator to cause the floor current and the current between the first radiator and the third radiator to generate an orthogonally polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In addition, the frequency difference f56 between the resonance point frequency f5 of the fifth resonance and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f3, and the current of the third radiator is curbed through the coupling between the second radiator and the third radiator, thereby adjusting the maximum radiation direction of the radiation pattern.

[0022] In one possible implementation, the frequency difference f46 between the fourth frequency f4 and the sixth resonance frequency f6 may satisfy: f46>100 MHz. In addition, the frequency difference f56 between the fifth frequency f5 and the sixth resonance frequency f6 may satisfy: 0≤f56≤100 MHz.

[0023] In another possible implementation of the present invention, in the mobile terminal provided by the present invention, the first housing includes a first support surface for supporting a 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 support surface and the second support surface are coplanar, the third support surface intersects 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 operating state. The first radiator is coupled to the floor via another branch of the first tuning circuit to form a fourth resonant structure corresponding to a fourth frequency; the second radiator is coupled to the floor via another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency; and the third radiator is configured to generate a sixth resonance. The resonant point frequencies of the fifth and sixth frequencies 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 the larger floor size, the current of the satellite antenna can be vertically distributed on the floor, thereby achieving circular polarization, which is beneficial for improving the performance of the satellite antenna.

[0024] In practical applications, the first housing includes a first support surface for supporting the flexible display, the second housing includes a second support surface for supporting the flexible display, and the third housing includes a third support surface for supporting the flexible display. When the first and second support surfaces are coplanar, the third support surface intersects 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 operating state. The first radiator is coupled to the floor via another branch of the first tuning circuit to form a fourth resonant structure corresponding to a fourth frequency. The second radiator is coupled to the floor via another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency. The third radiator is configured 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 the following condition: f46 > 10% * f6. This allows coupling between the first and third radiators to generate orthogonally polarized radiation fields between the floor current and the first and third radiators, thereby enhancing the circularly polarized 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 the following condition: f56 ≤ 10% * f6. This allows the coupling between the second and third radiators to suppress 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 the hovering state, thereby enhancing the communication performance of the satellite antenna.

[0025] In one possible implementation, a frequency difference f46 between the fourth frequency f4 and the sixth resonance frequency f6 satisfies: f46>100 MHz. In addition, a frequency difference f56 between the fifth frequency f5 and the sixth resonance frequency f6 satisfies: f56≤100 MHz.

[0026] In one possible implementation of the present invention, the first housing includes a first support surface for supporting a 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 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 operating state. The first radiator is coupled to the floor via another branch of the first tuning circuit to form a fourth resonant structure corresponding to a fourth frequency; the second radiator is coupled to the floor via another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency; and the third radiator is configured to generate a sixth resonance. The resonant point frequencies of the fourth, fifth, and sixth frequencies are all within the second communication frequency band of the satellite antenna. This arrangement allows the satellite antenna's current to be vertically distributed on the floor, thereby achieving circular polarization. This improves the performance of the satellite antenna and also allows adjustment of the maximum radiation direction of the radiation pattern.

[0027] In practical applications, the first housing includes a first support surface for supporting the flexible display, the second housing includes a second support surface for supporting the flexible display, and the third housing includes a third support surface for supporting the flexible display. When the first and second support surfaces are coplanar, the third support surface intersects 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 operating state. The first radiator is coupled to the floor via another branch of the first tuning circuit to form a fourth resonant structure corresponding to a fourth frequency. The second radiator is coupled to the floor via another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency. The third radiator is configured 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 the following: f46 ≤ 10% * f6. Furthermore, the frequency difference f56 between the fifth frequency f5 and the resonant point frequency f6 of the sixth resonance satisfies the following: f56 ≤ 10% * f6. In this way, circular polarization can still be achieved, improving the performance of the satellite antenna while adjusting the maximum radiation direction of the directional pattern.

[0028] In one possible implementation, a frequency difference f46 between the fourth frequency f4 and the sixth resonance frequency f6 satisfies: 0≤f46≤100 MHz. In addition, a frequency difference f56 between the fifth frequency f5 and the sixth resonance frequency f6 satisfies: 0≤f56≤100 MHz.

[0029] When the mobile terminal is in the hovering state in the above implementation, 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 90°.

[0030] In another possible implementation of the present invention, the first shell includes a first support surface for supporting the flexible display screen, the second shell includes a second support surface for supporting the flexible display screen, and the third shell includes a third support surface for supporting the flexible display screen. When the first support surface and the second support surface are coplanar and the third support surface is opposite to the second support surface, that is, when the mobile terminal is in a folded state, if the satellite antenna is in operation, the first radiator is coupled to the floor through another branch of the first tuning circuit to form a seventh resonant structure corresponding to the seventh frequency, the second radiator is coupled to the floor through another branch of the second tuning circuit to form an eighth resonant structure corresponding to the eighth frequency, and the third radiator is used to generate a ninth resonance. The resonant point frequency of the ninth resonance is within the third communication frequency band of the satellite antenna, the resonant point frequency of the seventh resonance is higher than the third communication frequency band, and the resonant point frequency of the eighth resonance is higher than the third communication frequency band. When the mobile terminal is in the folded state, the second radiator can serve as a parasitic radiator of the third radiator. Since the distribution of current that can be excited by the first resonant structure formed by the second radiator through the first tuning circuit is similar to the distribution of current excited by the ninth resonance generated by the third radiator, it can effectively reduce the decrease in 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.

[0031] Furthermore, when the mobile terminal is in the folded state, the third radiator can be disposed 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, thereby enabling the satellite antenna to still meet certain communication requirements.

[0032] In practical applications, the first housing includes a first support surface for supporting the flexible display, the second housing includes a second support surface for supporting the flexible display, and the third housing includes a third support surface for supporting the flexible display. When the first support surface and the second support surface are coplanar and the third support surface is opposite to the second support surface, that is, when the mobile terminal is in a folded state, if the satellite antenna is in operation, the first radiator is coupled to the floor via another branch of the first tuning circuit to form a seventh resonant structure corresponding to the seventh frequency. The second radiator is coupled to the floor via another branch of the second tuning circuit to form an eighth resonant structure corresponding to the eighth frequency. The third radiator is configured to generate a ninth resonant structure. The frequency difference f79 between the seventh frequency f7 and the resonant point frequency f9 of the ninth resonant structure satisfies the following condition: f79 > 10% * f9. This allows coupling between the first radiator and the third radiator to cause the floor current and the current between the first and third radiators to generate an orthogonally polarized radiation field, 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 the following condition: f89 > 10% * f9. This allows coupling between the second and third radiators to generate orthogonally polarized radiation fields from the floor current and the current between the first and third radiators, thereby enhancing the circular polarization gain of the satellite antenna. This reduces the effect of the folding of the third housing on the satellite antenna's radiation efficiency, thereby enabling the satellite antenna to still meet certain communication requirements.

[0033] Specifically, a frequency difference f79 between the seventh frequency f7 and the ninth resonance frequency f9 satisfies: f79>100 MHz. In addition, a frequency difference f89 between the eighth frequency f8 and the ninth resonance frequency f9 satisfies: f89>100 MHz.

[0034] In the present invention, the satellite antenna also includes a first feed point, and the satellite radio frequency link can be coupled to the third radiator via the first feed point. When the first radiator is disposed in the first housing, the second radiator is disposed in the third housing, and the third radiator is disposed 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 can help strengthen the satellite antenna's directivity pattern toward the third housing, thereby achieving a desired directivity pattern and improving the satellite antenna's radiation efficiency.

[0035] In one possible implementation of the present invention, the satellite antenna further includes a third switch component coupled to a third radiator. The third switch component can be switched between a transmitting state and a receiving state of the satellite antenna by switching the conductive state of the third switch component. For example, when the third switch component is in a first conductive state, the satellite antenna is in a transmitting state; and when the third switch component is in a second conductive state, the satellite antenna is in a receiving state.

[0036] Furthermore, when the satellite antenna is in a transmitting state, the first radiator can be connected to the first branch of the first tuning circuit. When the satellite antenna is in a receiving state, the first radiator can be connected to the second branch of the first tuning circuit. This allows the first radiator to be controlled accordingly via the corresponding branches of the first tuning circuit in both the transmitting and receiving states, thereby meeting the communication requirements of the satellite antenna while also enhancing the intelligence of the antenna system.

[0037] In another possible implementation of the present invention, when the satellite antenna is in a transmitting state or a receiving state, the first radiator can be connected to the same branch of the first tuning circuit. This can meet the satellite communication requirements of the mobile terminal while also simplifying the antenna system.

[0038] As described above, the mobile terminal provided by the present invention has at least two folding states. For any two folding states, when the satellite antenna is in the operating state, 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 tuning circuit satisfy the relationship with the resonant point 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 folding state.

[0039] In another possible implementation, the first radiator can be connected to the same branch of the first tuning circuit when the mobile terminal is in different folded states and the satellite antenna is in operation. For example, the first radiator can be connected to a branch that ensures the resonant frequency f of the first radiator satisfies the following conditions: 2500 MHz ≤ f ≤ 2700 MHz. This ensures that the first radiator operates within the fixed operating frequency band when the mobile terminal is in various folded states. This allows the mobile terminal to meet satellite communication requirements in different folded states while also simplifying the antenna system.

[0040] In the present invention, when the mobile terminal is in different folded states and the satellite antenna is in an operating state, the first radiator is connected to the same branch of the first tuning circuit. This can be understood as controlling the state of the first tuning circuit via an RF link in a fixed operating frequency band when the mobile terminal is in different folded states. Exemplarily, the antenna system may further include a cellular RF link, in which case the mobile terminal may control the state of the first tuning circuit via the cellular RF link, so that the first tuning circuit controls the first radiator to operate within the fixed operating frequency band.

[0041] In one possible implementation of the present invention, when the satellite antenna is in a non-operating state, the first radiator is coupled to the first antenna RF link and is used to generate a first resonance, where the resonant point frequency of the first resonance is within the communication frequency band of the first antenna. In practical applications, the first antenna RF link may be a cellular RF link. When the satellite antenna is in a non-operating state, the first radiator functions as a radiator of the cellular antenna; and when the satellite antenna is in an operating state, the first radiator may form a resonant structure with the first tuning circuit to influence the directional 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 may be the same as the resonant point frequency of the first resonance generated by the first radiator when the satellite antenna is in a non-operating state, thereby enabling reuse of cellular antennas and simplifying the antenna system.

[0042] In addition, in the present invention, 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 corresponding resonance.

[0043] In another possible implementation of the present invention, the antenna system further includes a cellular radio frequency link, the first radiator includes a second feed point, and the cellular radio frequency link is coupled to the second feed point. When the mobile terminal is closed and the satellite antenna is in a non-operating state, the second radiator functions as a radiator for 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 can also be greater than the resonant frequency of the first radiator. This allows both the second and third radiators to function as parasitic radiators of the first radiator, thereby improving the resonant efficiency of the first radiator and thereby enhancing the cellular communication performance of the antenna system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of a mobile terminal performing satellite communication in an embodiment of the present utility model;

[0045] Figure 2 A schematic structural diagram of a mobile terminal provided by an embodiment of the present utility model in a flattened state;

[0046] Figure 3A schematic diagram of a structure of a mobile terminal in a hovering state provided by an embodiment of the present utility model;

[0047] Figure 4 A simplified structural diagram of a mobile terminal provided by an embodiment of the present utility model in a flattened state;

[0048] Figure 5a A schematic diagram of the distributed structure of the antenna system when the mobile terminal provided by an embodiment of the present utility model is in a flat state;

[0049] Figure 5b A schematic diagram of another distributed structure of the antenna system when the mobile terminal provided by an embodiment of the present utility model is in a flat state;

[0050] Figure 6a A schematic diagram of a distributed structure of an antenna system of a mobile terminal in a hovering state provided by an embodiment of the present utility model;

[0051] Figure 6b A schematic diagram of another distributed structure of the antenna system when the mobile terminal provided by an embodiment of the present utility model is in a hovering state;

[0052] Figure 7a A schematic diagram of a distributed structure of an antenna system of a mobile terminal in a folded state provided by an embodiment of the present utility model;

[0053] Figure 7b for Figure 7a An enlarged view of the local structure at B of the structure shown;

[0054] Figure 7c A schematic diagram of another distributed structure of the antenna system of the mobile terminal in the folded state provided by an embodiment of the present utility model;

[0055] Figure 8 Another structural schematic diagram of the antenna system when the mobile terminal provided by an embodiment of the present utility model is in a flat state;

[0056] Figure 9 The embodiment of the present utility model provides Figure 8 A schematic diagram of the directional pattern of the satellite antenna of the mobile terminal shown in FIG. 1 when the satellite antenna is in a transmitting state;

[0057] Figure 10 The embodiment of the present utility model provides Figure 6a A schematic diagram of the directional pattern of the satellite antenna of the mobile terminal shown in FIG. 1 when the satellite antenna is in a transmitting state;

[0058] Figure 11 The embodiment of the present utility model provides Figure 7a The figure shows a schematic diagram of the directional pattern of the satellite antenna of the mobile terminal when it is in the transmitting state.

[0059] Reference numerals:

[0060] 100 - foldable bracket; 1 - first shell; 101 - first support surface; 2 - second shell; 201 - second support surface; 3 - third shell;

[0061] 301-third supporting surface; 4-first rotating shaft mechanism; 5-second rotating shaft mechanism;

[0062] 6-first radiator; 7-second radiator; 8-third radiator; 9-first feeding point; 10-first switch component;

[0063] SW1-first switch device; SW2-second switch device; 11-second switch component; SW3-third switch device; C1-first capacitor;

[0064] SW4-fourth switch device; I2-third switch component; SW5-fifth switch device; C2-second capacitor; SW6-sixth switch device;

[0065] 200-Flexible display. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0067] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, the singular expressions "a", "an", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0068] References in this specification to "one embodiment" or "a specific embodiment" mean that the particular features, structures, or characteristics described in conjunction with that embodiment are included in one or more embodiments of the present invention. The terms "including," "comprising," "having," and their variations all mean "including but not limited to," unless otherwise specifically stated.

[0069] In order to facilitate understanding of the mobile terminal provided by the embodiment of the present utility model, its application scenario is first introduced below.

[0070] Figure 1 FIG. 1 is a schematic diagram of a mobile terminal performing satellite communication in an embodiment of the present utility model, as shown in FIG. Figure 1As shown, communications satellite communications belong to non-terrestrial network (NTN) communications and can be used to communicate with mobile terminals. Compared to terrestrial communications, communications satellite communications provide wider coverage. Communications satellites can be used for communication, particularly in areas where cellular base stations are scarce or difficult to cover. Satellite communications systems can be categorized into three types based on the satellite's orbital altitude: geostationary Earth orbit (GEO) satellite communications systems (also known as synchronous orbit communications satellites), medium Earth orbit (MEO) satellite communications systems, and low Earth orbit (LEO) satellite communications systems. GEO satellites orbit at an altitude of 35,786 km. Their primary advantage is that they can remain stationary relative to the Earth and provide a larger coverage area. MEO satellites orbit at an altitude between 2,000 and 35,786 km. Their advantage is that a relatively small number of satellites can achieve global coverage. Considering the advantages and disadvantages of MEO satellite communications, MEO satellites are currently primarily used for positioning and navigation. The orbital altitude of LEO satellites ranges from 300 to 2000 km. LEO satellites have lower orbital altitudes than MEO and GEO satellites, and have the advantages of small data transmission delay, small transmission loss, and relatively low launch cost.

[0071] As satellite communication technology matures, it is gradually being applied to various types of mobile terminals. For example, a satellite antenna can be provided in a currently popular foldable mobile terminal product to implement the satellite communication function of the foldable mobile terminal.

[0072] At present, in order to meet the user's requirements for large display screen and portability of foldable mobile terminals, foldable mobile terminal products with multiple folding forms such as three-fold, four-fold, and five-fold are gradually used in people's daily lives. Figure 2 , Figure 2 This is a schematic diagram of a mobile terminal in a flattened state according to an embodiment of the present invention. The mobile terminal may include a foldable stand 100 and a flexible display 200, with the flexible display 200 mounted on the foldable stand 100. In this flattened state, the flexible display 200 is fully extended, maximizing the display area of the mobile terminal.

[0073] You can continue to refer to Figure 2The foldable stand 100 of the mobile terminal may include three shells and two hinge mechanisms. For ease of explanation, the three shells are named first shell 1, second shell 2, and third shell 3, respectively, and the two hinge mechanisms are named first hinge mechanism 4 and second hinge mechanism 5, respectively. The first hinge mechanism 4 is located between the first shell 1 and the second shell 2, and the first shell 1 and the second shell 2 are rotationally connected by the first hinge mechanism 4. The second hinge mechanism 5 is located between the second shell 2 and the third shell 3, and the second shell 2 and the third shell 3 are rotationally connected by the second hinge mechanism 5. When the mobile terminal is in use, the first shell 1 and the second shell 2 can rotate toward or away from each other under the action of the first hinge mechanism 4, and the second shell 2 and the third shell 3 can rotate toward or away from each other under the action of the second hinge mechanism 5, thereby enabling the mobile terminal to be closed and unfolded according to different usage scenarios.

[0074] To achieve communication via satellite communications, a connection must first be established between the mobile terminal's satellite antenna and the satellite. The satellite antenna's directional pattern is one factor that influences the speed and stability of the connection. Mobile terminals of varying form factors, such as foldable devices in different folding positions, typically have varying floor dimensions, which in turn affect the directional pattern differently. Therefore, by analyzing the directional patterns of satellite antennas for mobile terminals with varying floor dimensions, we can design satellite antennas to improve the mobile terminal's satellite communication performance.

[0075] In view of this, the mobile terminal provided by the present invention utilizes multiple radiators to jointly generate a target pattern of a satellite antenna to optimize the pattern of the satellite antenna, thereby improving the communication performance of the satellite antenna.

[0076] In the present invention, the foldable mobile terminal may include but is not limited to a mobile phone, a tablet computer, a laptop computer, an e-book reader, a camera, a wearable device, or a home electronic device, etc. For ease of understanding, in each embodiment of the present invention, the foldable mobile terminal is described as a mobile phone as an example.

[0077] In the present invention, the first shell 1, the second shell 2 and the third shell 3 can respectively form an installation space for installing electronic components such as a circuit board, a battery, a receiver, a speaker or a camera of the mobile terminal. Among them, the circuit board can integrate electronic components such as the main controller, storage unit, antenna module, power management module of the electronic device, and the battery can power the flexible display 200, the circuit board, the receiver, the speaker, the camera and other electronic components. In one possible design, at least two shells among the first shell 1, the second shell 2 and the third shell 3 are provided with an installation space to distribute the components of the mobile terminal in each shell. In another possible design, only one shell among the first shell 1, the second shell 2 or the third shell 3 can be provided with an installation space to concentrate the components of the mobile terminal in the above-mentioned accommodation space.

[0078] The above-mentioned flexible display screen 200 can be used to display information and provide an interactive interface for users. In each embodiment of the present invention, the flexible display screen 200 can 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 (MID) display screen, a micro organic light-emitting diode (MID) display screen, a micro organic light-emitting diode (MID) display screen, a quantum dot light-emitting diode (QLED) display screen, etc.

[0079] In addition, in order to facilitate the understanding of the present invention, the terms that may appear in the embodiments of the present invention are explained below.

[0080] Since the foldable mobile terminal includes multiple states during use, for example, the foldable mobile terminal includes a flat state, a hovering state, and a folded state. For the convenience of description, the angle between the first housing 1 and the second housing 2 is considered to be the first angle, and the angle between the second housing 2 and the third housing 3 is considered to be the second angle.

[0081] Flattened state: 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 above-mentioned first shell 1 and the second shell 2 can be between 175° and 185°, and the second angle between the above-mentioned second shell 2 and the third shell 3 can be between 175° and 185°. Specifically, the first angle between the above-mentioned first shell 1 and the second shell 2 can be 180°, and the second angle between the second shell 2 and the third shell 3 can be 180°.

[0082] Hovering state: refers to the state where the first shell 1 and the second shell 2 are unfolded to a certain angle but not completely flat. Figure 3 , Figure 3 A structural schematic diagram of a mobile terminal in a hovering state provided in an embodiment of the present invention, in which the first angle between the first shell 1 and the second shell 2 can be between 45° and 175°, and the second angle between the second shell 2 and the third shell 3 can be between 45° and 175°.

[0083] Folded state: also known as closed state, at this time, the first shell 1 and the second shell 2 of the foldable mobile terminal are completely folded and closed, and the second shell 2 and the third shell 3 are completely folded and closed, then the first angle is 0°, and the second angle is 0°; or, in some embodiments, the first angle between the first shell 1 and the second shell 2 can also be between 0° and 45°, and in addition, the second angle between the second shell 2 and the third shell 3 can also be between 0° and 45°.

[0084] Radiator: A device in an antenna used to receive / send electromagnetic wave radiation. In some cases, the narrow meaning of "antenna" is the radiator, which converts the guided wave energy from the transmitter into radio waves, or converts radio waves into guided wave energy, used to radiate and receive radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, where it is converted into a certain polarized electromagnetic wave energy and radiated in the desired direction. The receiving radiator converts the electromagnetic wave energy of a certain polarization from a specific direction in space into modulated high-frequency current energy and transmits it to the receiver input via the feeder line.

[0085] Ground / floor: can generally refer to at least a portion of any grounding layer, grounding plate, or grounding metal layer within a communication terminal (such as a mobile phone), or at least a portion of any combination of any of the above grounding layers, grounding plates, or grounding components. "Ground / floor" can be used for grounding components within the communication terminal. In one embodiment, the "ground / floor" may include any one or more of the following: the grounding layer of the communication terminal's circuit board, the grounding plate formed by the communication terminal's midframe, the grounding metal layer formed by the metal film below the screen, the conductive grounding layer of the battery, and conductive or metal parts electrically connected to the above grounding layer / grounding plate / metal layer. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12-14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by a dielectric layer or insulating layer such as fiberglass, polymer, etc.

[0086] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of a conductive material. In one embodiment, the conductive material can be any of the following: copper, aluminum, stainless steel, brass, and alloys thereof, 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 and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, a graphite-coated substrate, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art will appreciate that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0087] The housing of the mobile terminal includes a frame, which is circumferentially arranged around the outer periphery of the housing. Among them, the frame mainly comprising conductive material can be referred to as the conductive frame or metal frame of the mobile terminal, which is suitable for industrial design (ID) with a metal appearance. In one implementation, the outer surface of the frame is mainly conductive material, such as metal material, thereby forming the appearance of a metal frame. In these implementations, the conductive portion of the frame including the outer surface can be used as the antenna radiator of the mobile terminal and is generally referred to as a frame antenna.

[0088] In another implementation, the outer surface of the frame is primarily made of a non-conductive material, such as plastic, creating a non-metallic frame appearance suitable for non-metallic IDs. In one implementation, the inner surface of the frame may include a conductive material, such as a metal material. In this implementation, the conductive portion of the inner surface of the frame can serve as the antenna radiator of the mobile terminal. It should be understood that the radiator disposed on the inner surface of the frame (or, in other words, the conductive material on the inner surface) can be placed close to the non-conductive material of the frame to minimize the volume occupied by the radiator and be closer to the exterior of the mobile terminal, achieving better signal transmission. This can also be referred to as a frame antenna. It should be noted that the antenna radiator being placed close to the non-conductive material of the frame means that the antenna radiator can be placed closely to the inner surface of the non-conductive material, embedded within the non-conductive material, or close to the inner surface of the non-conductive material, for example, with a small gap between the antenna radiator and the inner surface of the non-conductive material. It should be understood that both the conductive material and the non-conductive material can be considered part of the frame.

[0089] The RF chip is the combination of all antenna components used for receiving and transmitting RF 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 considered the component after the final power amplifier. In some cases, the RF chip can also be considered the feed unit. The RF chip has the function of converting radio waves into electrical signals and transmitting them to the receiver component. Generally, it is considered the part of the antenna system responsible for converting radio waves into electrical signals and vice versa. Antenna design should consider maximum power transmission potential and efficiency. To achieve this, the antenna feed impedance must be matched to the load resistor. The antenna feed impedance is a combination of resistance, capacitance, and inductance. To ensure maximum power transmission, the two impedances (load resistor and feed impedance) must be matched. This matching can be achieved by considering the frequency requirements and antenna design parameters such as gain, directivity, and radiation efficiency.

[0090] The feed source / feed circuit is a combination of all circuits used for receiving and transmitting radio frequency signals. The feed circuit may include a transceiver and an RF front end circuit. In some cases, the "feed circuit" is understood in a narrow sense as a radio frequency integrated circuit (RFIC), and the RFIC can be considered to include an RF front end chip and a transceiver. The feed circuit has the function of converting radio waves (e.g., radio frequency signals) and electrical signals (e.g., digital signals). Generally, it is considered to be part of the radio frequency.

[0091] 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 and test the characteristics of the RF front-end circuit or antenna radiator through the cable. The RF front-end circuit can be considered as the circuit portion coupled between the test socket and the transceiver.

[0092] In some embodiments, the RF front-end circuit may be integrated into a RF front-end chip in the electronic device, or the RF front-end circuit and the transceiver may be integrated into a RF chip in the electronic device.

[0093] It should be understood that any two of the first / second / …Nth feeding circuits in the present invention can share the same transceiver, for example, transmitting signals through a radio frequency channel in a transceiver (for example, a port (pin) of a radio frequency chip); they can also share a radio frequency front-end circuit, for example, processing signals through a switch or amplifier in a radio frequency front-end.

[0094] It should also be understood that two feeding circuits in the first / second / ...Nth feeding circuit in the present invention usually correspond to two radio frequency test sockets in the electronic device.

[0095] Feeder: Also known as transmission line, it refers to the connection line between the antenna's RF chip and the radiator. The transmission line can directly transmit current waves or electromagnetic waves, depending on the frequency and form. The connection point on the radiator where the transmission line is connected is usually called the feed point. Transmission lines include wire transmission lines, coaxial transmission lines, waveguides, or microstrip lines. Depending on the implementation form, the transmission line can include a bracket antenna body or a glass antenna body. Depending on the carrier, the transmission line can be implemented by liquid crystal polymer materials (LCP), flexible printed circuits (FPC), or printed circuit boards (PCB).

[0096] 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 in which the return loss characteristic is less than -6dB. The strongest resonance point can be called the resonance point, and the frequency corresponding to the resonance point is the center frequency point frequency. The return loss characteristic of the center frequency can be less than -20dB. It should be understood that, unless otherwise specified, the antenna / radiator mentioned in the present invention produces a "first / second... resonance", wherein 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 the specific design, and each antenna mode can generate a corresponding fundamental mode resonance.

[0097] Resonant frequency band: The range of the resonant frequency is the resonant frequency band. The return loss characteristic of any frequency point in the resonant frequency band can be less than -6dB or -5dB.

[0098] Communication frequency band / working frequency band: Regardless of the type of antenna, it always operates within a certain frequency range (band width). For example, an antenna that supports the B40 frequency band has an operating frequency band that includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the antenna's operating frequency band includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as 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. The bandwidth can be considered as a frequency range on both sides of the center frequency (for example, the resonant frequency of a dipole), where the antenna characteristics are within the acceptable value range of the center frequency.

[0099] The resonant frequency band and the operating frequency band may be the same or different, or their frequency ranges may partially overlap. In one embodiment, the resonant frequency band of the antenna may cover multiple operating frequency bands of the antenna.

[0100] Medium wavelength: This refers to the wavelength of an electromagnetic wave 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 in the range [w1, w2]. Alternatively, to simplify calculations, the medium wavelength can also refer to the wavelength of an electromagnetic wave propagating in a medium at the center frequency f0 of the operating frequency band. In this case, the medium wavelength is the specific value w0.

[0101] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port by the antenna circuit to the antenna port's transmitted power. The smaller the reflected signal, the larger the signal radiated from the antenna into space, and the greater the antenna's radiation efficiency. The larger the reflected signal, the smaller the signal radiated from the antenna into space, and the lower the antenna's radiation efficiency.

[0102] Antenna return loss can be expressed using the S11 parameter, a type of S parameter. S11 represents the reflection coefficient and can characterize the antenna's transmission efficiency.

[0103] In one embodiment, the S11 diagram can be understood as a schematic diagram for representing the resonance generated by the antenna. In one embodiment, the portion of the resonance shown in the S11 diagram that is less than -6dB can be understood as the resonant frequency / frequency range / operating frequency band generated by the antenna. The S11 parameter is usually a negative number. The smaller the S11 parameter, the smaller the antenna return loss and the less energy reflected back by the antenna itself, which means that more energy actually enters the antenna and the higher the antenna's radiation efficiency. The larger the S11 parameter, the greater the antenna return loss and the lower the antenna's radiation efficiency.

[0104] It should be noted that in engineering, an S11 value of -6dB is generally used as a standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna can work normally, or the antenna can be considered to have good transmission efficiency.

[0105] Antenna pattern: Also known as radiation pattern. It is a graph showing how the relative field strength (normalized modulus) of the antenna's radiation field changes with direction at a certain distance from the antenna. It is usually represented by two mutually perpendicular plane patterns passing through the antenna's direction of maximum radiation.

[0106] Antenna patterns typically have multiple radiation beams. The beam with the strongest radiation intensity is called the main lobe, while the remaining beams are called side lobes. Among the side lobes, those in the opposite direction of the main lobe are also called back lobes.

[0107] 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. Active power input to the antenna = antenna input power - power loss. Power loss primarily includes return loss and metal ohmic loss and / or dielectric loss. Both metal loss and dielectric loss affect radiation efficiency.

[0108] Those skilled in the art will understand that radiation efficiency is generally expressed as a percentage, which has a corresponding conversion relationship with dB. The closer the radiation efficiency is to 0 dB, the better the radiation efficiency of the antenna.

[0109] dB: Decibel, a logarithmic scale with a base of ten. The decibel scale is used only to measure the proportional relationship between one physical quantity and another; it itself has no physical dimension. For every 10-fold increase in the ratio between two quantities, the difference between them is expressed as 10 decibels. For example: A = 100, B = 10, C = 5, and D = 1. Then, A / D = 20dB; B / D = 10dB; C / D = 7dB; and B / C = 3dB. In other words, a 10dB difference between two quantities is a 10-fold difference, a 20dB difference is a 100-fold difference, and so on. A 3dB difference is a 2-fold difference.

[0110] End: The "end" in the terms "first end / second end / third end / fourth end / ground end / open end" of the main radiator should not be narrowly understood as an endpoint or end physically disconnected from other radiators. It can also be considered as a section of the main radiator that includes the first endpoint, where the first endpoint is the endpoint of the main radiator at the gap. For example, the first end of the main radiator can be considered as a section of the main radiator within a range of one-eighth of a first wavelength from the 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 resonance point. In one embodiment, an "end / point" can include a connection / coupling region on the radiator that couples to other conductive structures. For example, a feed end / feeding point can be a coupling region on the antenna radiator that couples to the feed structure (e.g., a region facing a portion of the feed structure). For another example, a ground end / grounding point can be a connection / coupling region on the antenna radiator that couples to the ground structure.

[0111] Open end and closed end: In some embodiments, the terms open end and closed end refer to, for example, whether or not they are grounded. A closed end is grounded, while an open end is not. In one embodiment, an open end may also be referred to as a floating end, a free end, an open end, or an open-circuit end. In one embodiment, a closed end may also be referred to as a grounded end or a short-circuit end. It should be understood that in some embodiments, an open end may be coupled to other conductors to transfer coupled energy (which may be understood as transferring current).

[0112] In some embodiments, the open end and the closed end are, for example, relative to other conductors. The closed end is electrically connected to the other conductors, and the open end is not electrically connected to the other conductors.

[0113] To simply understand the "open end" of a radiator, one end of the radiator is spaced apart from the floor or coupled to the floor through a capacitive device, which can be regarded as the open end of the radiator.

[0114] To simply understand the "ground end" of the radiator, one end of the radiator is directly connected to the floor or coupled to the floor through an inductive device, which can be regarded as the ground end of the radiator.

[0115] In some embodiments, the "closed end" can also be understood from the perspective of current distribution. The closed end or the grounded end can be understood as a point with larger current on the radiator, or as a point with smaller electric field on the radiator. In one embodiment, coupling electronic devices (for example, inductive devices, etc.) through the closed end can maintain the current distribution characteristics of the larger current point / small electric field point. In one embodiment, opening a gap at or near the closed end (for example, a gap filled with insulating material) can maintain the current distribution characteristics of the larger current point / small electric field point.

[0116] In some embodiments, the understanding of "open end" can also be viewed from the perspective of current distribution. The open end or floating end can be understood as a point with low current on the radiator, or as a point with high electric field on the radiator. In one embodiment, coupling electronic devices (for example, capacitive devices, etc.) through the open end can maintain the current distribution characteristics of the low current point / high electric field point.

[0117] It should be understood that coupling electronic devices (for example, capacitors, inductors, etc.) to the radiator end at a gap (from the perspective of the radiator structure, it is similar to a radiator at an opening of an open end or a suspended end) can make the radiator end a point with larger current / smaller 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.

[0118] Capacitance: This can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance includes capacitive components, such as capacitors; distributed capacitance (or distributed capacitance) includes the equivalent capacitance formed by two conductive parts separated by a certain gap.

[0119] In the embodiments of the present invention, the wavelength in a certain wavelength mode (such as a half-wavelength mode) of an antenna may 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 frequency is the frequency of the radiated signal. The wavelength of the radiated signal in a medium can be calculated as follows: Where ε is the relative dielectric constant of the medium, and frequency is the frequency of the radiation signal.

[0120] Coupling: In this disclosure, "coupling connection" can be understood as indirect coupling. "Indirect coupling" can be understood as electrical conduction between two conductors through a gap or without contact. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, where signal transmission is achieved by coupling between two conductive members through a gap to form an equivalent capacitor.

[0121] The limitations such as symmetry (for example, axisymmetry, or central symmetry, etc.), parallelism, perpendicularity, and sameness (for example, same length, same width, etc.) mentioned in the embodiments of the present invention are all for the current level of technology, rather than being absolutely strict definitions in a mathematical sense. There may be a deviation of a predetermined angle between two structures that are parallel or perpendicular to each other. In one embodiment, the predetermined threshold value may be less than or equal to a threshold value of 1 mm, for example, the predetermined threshold value may be 0.5 mm, or may be 0.1 mm. In one embodiment, the predetermined angle may be an angle within the range of ±10°, for example, the predetermined angle deviation is ±5°.

[0122] It is worth noting that in the embodiment of the present invention, the two are "perpendicular" to each other, which means that there can be a predetermined angle deviation between them. For example, the predetermined angle can be 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, or 95°, etc.

[0123] It is worth noting that in the embodiment of the present invention, the two are "parallel" means that there can be a predetermined angle deviation between them. For example, the predetermined angle can be 0°, 0.5°, 1°, 1.5°, 2°, 3°, 4°, 4.5° or 5°, etc.

[0124] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0125] Figure 4 A schematic diagram of the structure of a mobile terminal in a flattened state provided by an embodiment of the present utility model. Figure 4 As shown, in an embodiment of the present invention, in addition to the aforementioned first housing 1, second housing 2, third housing 3, first hinge mechanism 4, and second hinge mechanism 5, the mobile terminal also includes an antenna system. The antenna system includes a satellite antenna, which is used to receive and transmit electromagnetic waves. Specifically, the satellite antenna is used to receive electromagnetic waves from a communications satellite or transmit electromagnetic waves to a communications satellite. This enables satellite communication functionality of the mobile terminal through the transmission of electromagnetic waves between the satellite antenna and the communications satellite. In specific embodiments, the mobile terminal can use the satellite antenna to implement at least one of satellite text messaging, satellite phone calls, or satellite internet access.

[0126] When the satellite antenna is specifically provided, the satellite antenna includes a first radiator 6, a second radiator 7 and a third radiator 8. In the present invention, the first radiator 6, the second radiator 7 and the third radiator 8 can be respectively provided in different housings of the mobile terminal.

[0127] In addition, 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, which can be exemplarily located at Figure 2 The A end of the mobile terminal shown in the figure is, in the present invention, the A end can be the normal use state of the mobile terminal, and when the flexible display screen 200 is facing the user, the relatively upper end of the mobile terminal can be used to facilitate the alignment of the satellite antenna. In a specific embodiment, as shown in FIG. Figure 4 As shown, the first radiator 6 is disposed at the end of the first shell 1 , the second radiator 7 is disposed at the end of the third shell 3 , and the third radiator 8 is disposed at the end of the second shell 2 .

[0128] To achieve communication functionality, the satellite antenna also includes a satellite radio frequency link, a first tuning circuit, and a second tuning circuit. The satellite radio frequency link is coupled to a third radiator 8 to feed power to the third radiator 8 via the satellite radio frequency link, thereby 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 the present invention does not limit the specific locations of the satellite radio frequency link, the first tuning circuit, and the second tuning circuit. Exemplarily, they may be located on a circuit board in the mobile terminal and housed within the mounting space formed by the housing.

[0129] In this way, a resonant structure can be formed with the first tuning circuit and the first radiator, and another resonant structure can be formed with the second tuning circuit and the second radiator 7. Thus, the two resonant structures can affect the resonant mode of the resonance generated by the third radiator 8, so as to achieve the purpose of adjusting the target radiation pattern of the satellite antenna and / or improving the gain of the satellite antenna. Using the design scheme of the antenna system provided by the utility model, when the satellite antenna is in an operating state, the first radiator 6 and the first tuning circuit, the second radiator 7 and the second tuning circuit, and the third radiator 8 can be used to jointly generate the target radiation pattern of the satellite antenna, which is conducive to optimizing the radiation pattern of the satellite antenna and / or improving the gain of the satellite antenna, thereby improving the communication performance of the satellite antenna.

[0130] It is worth mentioning that the above-mentioned "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" 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 will all affect the target radiation pattern of the satellite antenna, such as affecting the maximum radiation direction of the target radiation pattern.

[0131] As can be seen from the above description, for foldable mobile terminals, the floor dimensions vary when they are in different folded states, and different floor dimensions have different effects on the radiation pattern. To understand the effect of the antenna system design provided by the present invention on optimizing the radiation pattern of the satellite antenna, the communication performance of the satellite antenna of the mobile terminal in different folded states is analyzed below.

[0132] Figure 5a This is a schematic diagram of the distributed structure of the antenna system when the mobile terminal provided by the embodiment of the present utility model is in a flat state. Figure 5a In the state shown, the floor of the mobile terminal is composed of the floors of the three shells connected in sequence along their arrangement direction, so the overall size of the floor of the mobile terminal is the largest. Figure 5aIn the antenna system shown, a third radiator 8 is disposed in the second housing 2, a first radiator 6 is disposed in the first housing 1, and a second radiator 7 is disposed in the third housing 3. In this embodiment, the first radiator 6 is coupled to the floor via a branch of a first tuning circuit to form a first resonant structure corresponding to a first frequency. The second radiator 7 is coupled to the floor via a branch of a second tuning circuit to form a second resonant structure corresponding to a second frequency. Furthermore, the third radiator 8 is fed via a satellite RF link, enabling it to generate a third resonance.

[0133] It is worth mentioning that in the present invention, the resonant structure may 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 resonance of the third radiator 8.

[0134] Furthermore, the frequency corresponding to the resonant structure refers to the frequency corresponding to the electrical length of the branch of the tuned circuit to which the radiator is connected. When the resonant structure is fed, the frequency of resonance that the resonant structure can produce can be considered the frequency corresponding to the resonant structure. It is understood that the frequency corresponding to the resonant structure is related to the branch of the tuned circuit to which the radiator is connected.

[0135] The different branches of the first tuning circuit can be understood as having different conduction states of the first tuning circuit, 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.

[0136] Similarly, different branches of the second tuning circuit can be understood as having different conduction states of the second tuning circuit, 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.

[0137] In one embodiment, Figure 5a In the illustrated embodiment, the resonant frequencies of the first and third resonances are both within the satellite antenna's first communication frequency band. This allows the current from the third radiator 8 to flow to the first radiator 6 and then to the ground through the first radiator 6. This tilts the satellite antenna's directional pattern toward the third housing 3.

[0138] In one embodiment, the second frequency is higher than the resonance point frequency of the third resonance, and the coupling between the second radiator 7 and the third radiator 8 makes the current of the third radiator 8 (such as Figure 5aThe arrows shown by the single dotted line in the figure flow to the second radiator 7 and then to the floor. Figure 5a In the flattened state shown, the floor size of the mobile terminal is large, and the current on the floor (such as Figure 5a The light (indicated by the dashed arrows) flows in a traveling wave state along the frame and floor, generating an orthogonally polarized radiation field. This enhances the circular polarization gain of the satellite antenna, which in turn increases the beamwidth of the pattern to meet the satellite antenna's alignment requirements, thereby improving the satellite antenna's communication performance.

[0139] It is understandable that in Figure 5a The general shape and beamwidth of the satellite antenna's directional pattern are only schematically shown. In actual applications, as long as the beamwidth in the upper hemisphere of the satellite antenna's directional pattern meets regulatory requirements (exemplarily greater than or equal to ±15°), the satellite antenna's alignment requirements are met.

[0140] It is worth mentioning that the present invention does not limit the first communication frequency band of the satellite antenna. It can be exemplarily the working frequency band of the satellite antenna in the receiving state when the mobile terminal is in the flattened state; or it can be the working frequency band of the satellite antenna in the transmitting state. In addition, it can be understood that when the satellite antenna communicates with different communication satellites, the working frequency band of the satellite antenna in the receiving state may be different, and the working frequency band of the satellite antenna in the transmitting state may also be different. However, the antenna system provided by the present invention can adjust the first frequency, the second frequency and the resonance point frequency of the resonance of the third radiator 8 according to different application scenarios when the mobile terminal is in the flattened state so that they meet the above relationship, thereby optimizing the directional pattern of the satellite antenna under the joint action of the first radiator and the first tuning circuit, the second radiator and the second tuning circuit and the third radiator, and / or improving the gain of the satellite antenna to improve the satellite communication performance of the mobile terminal.

[0141] In the present invention, the satellite antenna further includes a first feeding point 9, and the satellite radio frequency link can be coupled to the third radiator 8 through the first feeding point 9. In addition, when the mobile terminal is in Figure 5a As shown in the flattened state, the first radiator 6 is arranged in the first shell 1, the second radiator 7 is arranged in the third shell 3, and the third radiator 8 is arranged in the second shell 2. Figure 4 As shown, the distance L1 between the first feeding point 9 and the axis of the first rotating shaft mechanism 4 is greater than the distance L2 between the first feeding point 9 and the axis of the second rotating shaft mechanism 5. This helps to strengthen the directivity of the satellite antenna toward the third housing 3, thereby improving the radiation efficiency of the satellite antenna.

[0142] In one embodiment, Figure 5aIn the illustrated embodiment, to enable the first resonant structure to suppress the current of the third resonant structure, the frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonant structure can satisfy the following conditions: f13 ≤ 10% * f3. In a specific embodiment, the frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonant structure satisfies the following conditions: 0 ≤ f13 ≤ 100 MHz. For example, f13 = 50 MHz, f13 = 65 MHz, or f13 = 90 MHz.

[0143] In one embodiment, the frequency difference f23 between the second frequency f2 and the third resonance f3 satisfies: f23 > 10% * f3. Exemplarily, f23 ≥ 20% * f3. This allows the second resonant structure to guide the current of the third resonance toward the floor and the frame, thereby enhancing the orthogonal polarization characteristics of the floor current and the current between the second radiator 7 and the third radiator 8, thereby facilitating improvement of 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 resonance satisfies: f23 > 100 MHz. Exemplarily, f23 ≥ 300 MHz, for example, f23 = 350 MHz, f23 = 500 MHz, f23 = 600 MHz, f23 = 700 MHz, or f23 = 1000 MHz.

[0144] It is worth mentioning that in the above Figure 5a In the illustrated embodiment, the first frequency corresponding to the first resonant structure is set within the first communication frequency band, thereby tilting the satellite antenna's directional pattern toward the third housing 3. In another possible embodiment of the present invention, when the mobile terminal is flattened and the third radiator 8 is disposed within the second housing 2, if the satellite antenna is in operation, the resonant point frequency of the third resonant structure can be set within the satellite antenna's first communication frequency band, with the first frequency being higher than the first communication frequency band, and the second frequency being higher than the first communication frequency band. The orthogonally polarized radiation field generated by the floor and frame radiators enhances the satellite antenna's circular polarization gain, thereby improving the satellite antenna's communication performance.

[0145] 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 operation, in a possible embodiment of the present invention, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance can satisfy: f13>10%*f3. For example, f13 can be ≥20%*f3, so that the coupling between the first radiator 6 and the third radiator 8 causes the floor current and the current between the first radiator 6 and the third radiator 8 to generate an orthogonal polarization radiation field, thereby enhancing the circular polarization gain of the satellite antenna. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance can satisfy: f23>10%*f3. For example, f23 can be ≥20%*f3, so that the coupling between the second radiator 7 and the third radiator 8 causes the floor current and the current between the second radiator 7 and the third radiator 8 to generate an orthogonal polarization radiation field, thereby facilitating the improvement of the circular polarization gain of the satellite antenna.

[0146] In one embodiment, a frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: f13>100 MHz. For example, f13 can be ≥300 MHz, such as f13=350 MHz, f13=500 MHz, f13=600 MHz, f13=700 MHz, or f13=1000 MHz. In addition, a frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23>100 MHz. For example, f23 can be ≥300 MHz, such as f23=350 MHz, f23=500 MHz, f23=600 MHz, f23=700 MHz, or f23=1000 MHz.

[0147] In the above embodiment, the effect of the directional pattern produced by the three radiators is mainly described by taking the third radiator 8 as an example and setting it in the second housing 2. In actual application, the setting positions of the three radiators can be adjusted according to specific design requirements. For example, refer to Figure 5b , Figure 5b This is another schematic diagram of the distributed structure of the antenna system when the mobile terminal provided by the embodiment of the present invention is in a flat state. Figure 5a The radiators in the mobile terminal shown are arranged at different positions. Figure 5b In the embodiment, the first radiator 6 is disposed in the first shell 1 , the second radiator 7 is disposed in the second shell 2 , and the third radiator 8 is disposed in the third shell 3 .

[0148] exist Figure 5bIn the embodiment shown, when the satellite antenna is in operation, the first radiator 6 is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure corresponding to a first frequency. The second radiator 7 is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure corresponding to a second frequency. The third radiator 8 is used to generate a third resonance.

[0149] In one embodiment, the resonant point frequency of the third resonance is within the first communication frequency band of the satellite antenna, but the first frequency is higher than the first communication frequency band, and the second frequency is 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 both have a significant impact on the resonant mode of the resonance generated by the third radiator 8, thereby achieving the purpose of adjusting the satellite antenna's directivity pattern and the circular polarization gain of the antenna, thereby improving the radiation efficiency of the satellite antenna.

[0150] In addition, in a 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 resonance point frequency f3 of the third resonance can also satisfy: f13>10%*f3. For example, f23≥20%*f3. This allows the current between the first radiator 6 and the third radiator 8 and the floor 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 resonance point frequency f1 of the first resonance and the resonance point frequency f3 of the third resonance can satisfy: f13>100MHz. For example, f13≥300MHz, for example, f13=350MHz, f13=500MHz, f13=600MHz, f13=700MHz, or f13=1000MHz.

[0151] The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23 > 10% * f3. For example, f13 ≥ 20% * f3. This allows the current between the second radiator 7 and the third radiator 8 and the floor 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 resonance point frequency f2 of the second resonance and the resonance point frequency f3 of the third resonance satisfies: f23 > 100 MHz. For example, f23 ≥ 300 MHz, for example, f23 = 350 MHz, f23 = 500 MHz, f23 = 600 MHz, f23 = 700 MHz, or f23 = 1000 MHz.

[0152] Figure 5b Other structures of the mobile terminal shown can refer to Figure 5aThe mobile terminal shown is set up and will not be described in detail here.

[0153] In one embodiment, when the mobile terminal is in a flattened state, 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, and the satellite antenna is in operation, the resonant point frequencies of the first frequency and the third resonance can be set within the first communication frequency band of the satellite antenna, with the second frequency being higher than the first communication frequency band. This improves the circular polarization gain of the satellite antenna while adjusting the maximum radiation direction of the satellite antenna's directional pattern.

[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 operation, the frequency difference f13 between the first frequency f1 and the resonant point frequency f3 of the third resonance satisfies: f13 ≤ 10% * f3, so that the current of the third radiator 8 is curbed through coupling between the first radiator 6 and 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 point frequency f3 of the third resonance satisfies: f23 > 10% * f3. Exemplarily, f23 can be ≥ 20% * f3, so that the coupling between the second radiator 7 and the third radiator 8 causes the floor current and the current between the second radiator 7 and the third radiator 8 to generate an orthogonally polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna.

[0155] In one embodiment, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies: 0≤f13≤100 MHz, and illustratively, f13=50 MHz, f13=65 MHz, or f13=90 MHz, etc. In addition, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies: f23>100 MHz, and illustratively, f23 can be ≥300 MHz, such as f23=350 MHz, f23=500 MHz, f23=600 MHz, f23=700 MHz, or f23=1000 MHz, etc.

[0156] Figure 6a A schematic diagram of a distributed structure of an antenna system in a hovering state of a mobile terminal provided by an embodiment of the present utility model. Figure 6a As shown, the first housing 1 includes a first supporting surface 101 for supporting the flexible display screen, the second housing 2 includes a second supporting surface 201 for supporting the flexible display screen, and the third housing 3 includes a third supporting surface 301 for supporting the flexible display screen. In the hovering state, the first supporting surface 101 and the second supporting surface 201 are coplanar, and the third supporting surface 301 intersects with the second supporting surface 201.

[0157] It is worth mentioning that in the present invention, the first support surface 101 and the second support surface 201 are coplanar, which can be understood as the angle between the first support surface 101 and the second support surface 201 being 175° to 185°. In practical applications, the angle between the first support surface 101 and the second support surface 201 can be 180°. In addition, the intersection of the third support surface 301 and the second support surface 201 can be such that the angle α between the third support surface 301 and the second support surface 201 satisfies the following conditions: 45°≤α≤135°, for example, 60°≤α≤120° or 80°≤α≤100°. In practical applications, α can be set to 90°.

[0158] exist Figure 6a In the illustrated embodiment, a first radiator 6 is disposed in the first housing 1, a third radiator 8 is disposed in the second housing 2, and a second radiator 7 is disposed in the third housing 3. The first radiator 6 is coupled to the floor 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 floor via another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency. The third radiator 8 is configured to generate a sixth resonance. The resonant point frequencies of the fifth and sixth frequencies are within the second communication frequency band of the satellite antenna, while the fourth frequency is higher than the second communication frequency band.

[0159] Because in Figure 6a In the state shown, the floor of the mobile terminal is relatively large, and the current on the floor is vertically distributed, thereby achieving circular polarization, which is beneficial to improving the performance of the satellite antenna.

[0160] It is worth mentioning that the present invention does not limit the second communication frequency band of the satellite antenna. It can be exemplarily the working frequency band of the satellite antenna in the receiving state when the mobile terminal is in the hovering state; or it can be the working frequency band of the satellite antenna in the transmitting state. In addition, it can be understood that when the satellite antenna communicates with different communication satellites, the working frequency band of the satellite antenna in the receiving state may be different, and the working frequency band of the satellite antenna in the transmitting state may also be different. However, the antenna system provided by the present invention can adjust the fourth frequency, the fifth frequency and the resonance point frequency of the third radiator 8 according to different application scenarios when the mobile terminal is in the hovering state, so that they meet the above relationship, thereby optimizing the directional pattern of the satellite antenna under the joint action of the first radiator and the first tuning circuit, the second radiator and the second tuning circuit and the third radiator, and / or improving the gain of the satellite antenna to improve the satellite communication performance of the mobile terminal.

[0161] In one embodiment of the present invention, the frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance can satisfy: f46>10%*f6. For example, f46≥20%*f6. This allows the coupling between the first radiator 6 and the third radiator 8 to cause the floor current and the current between the first radiator 6 and the third radiator 8 to generate an orthogonally polarized radiation field, 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>100 MHz. For example, f46≥300 MHz, for example, f46=350 MHz, f46=500 MHz, f46=600 MHz, f46=700 MHz, or f46=1000 MHz.

[0162] In one embodiment of the present invention, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies the following: f56 ≤ 10% * f3. This serves to curb the current in the third radiator 8 through coupling between the second radiator 7 and 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 the following: 0 ≤ f56 ≤ 100 MHz. For example, f56 = 50 MHz, f56 = 65 MHz, or f56 = 90 MHz.

[0163] It is worth mentioning that when the mobile terminal is in Figure 6a In the hovering state shown, the resonant point frequency of the sixth resonance can be set within the second communication frequency band of the satellite antenna, the fourth frequency can be set higher than the second communication frequency band, and the fifth frequency can be set higher than the second communication frequency band. Because the floor of the mobile terminal is relatively large, the current of the satellite antenna can be distributed vertically on the floor, thereby achieving circular polarization, which is beneficial to improving the performance of the satellite antenna.

[0164] It is understandable that in actual application, the positions of the three radiators can be adjusted according to specific design requirements. Figure 6b As shown, Figure 6b This is another schematic diagram of the distributed structure of the antenna system when the mobile terminal provided by the embodiment of the present invention is in a hovering state. Figure 6a The radiators in the mobile terminal shown are arranged at different positions. Figure 6b In the embodiment, the first radiator 6 is provided in the first shell 1, the second radiator 7 is provided in the second shell 2, and the third radiator 8 is provided in the third shell 3. The fifth frequency and the resonant point frequency of the sixth resonance generated by the third radiator 8 are within the second communication frequency band of the satellite antenna, but the fourth frequency is higher than the second communication frequency band. Figure 6bIn the hovering state shown, since the floor size is large and the current of the satellite antenna can be distributed vertically on the floor, thereby achieving circular polarization, it is beneficial to improve the performance of the satellite antenna.

[0165] In addition, 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 point frequency f6 of the sixth resonance can also satisfy: f46>10%*f6. For example, f46 can be ≥20%*f6. This allows the coupling between the first radiator 6 and the third radiator 8 to cause the floor current and the current between the first radiator 6 and the third radiator 8 to generate an orthogonally polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f46 between the resonant point frequency f4 of the fourth resonance and the resonant point frequency f6 of the sixth resonance can satisfy: f46>100 MHz. For example, f46 can be ≥300 MHz, for example, f46=350 MHz, f46=500 MHz, f46=600 MHz, f46=700 MHz, or f46=1000 MHz.

[0166] The frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance satisfies the following: f56 ≤ 10% * f6. This allows the coupling between the second radiator 7 and the third radiator 8 to suppress the current of 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 the following: 0 ≤ f56 ≤ 100 MHz. For example, f56 = 50 MHz, f56 = 65 MHz, or f56 = 90 MHz.

[0167] Figure 6b Other structures of the mobile terminal shown can refer to Figure 6a The mobile terminal shown is set up and will not be described in detail here.

[0168] 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 operation, the resonant frequencies of the first frequency, the second frequency, and the third resonance can be made to lie within the first communication frequency band of the satellite antenna. This allows the current of the satellite antenna to still be distributed vertically on the floor, thereby achieving circular polarization. This improves the performance of the satellite antenna and also allows adjustment of the maximum radiation direction of the directional pattern.

[0169] In one embodiment of the present invention, when the mobile terminal is in Figure 6bIn the hovering state shown, with the first radiator 6 disposed in the first housing 1, the second radiator 7 in the second housing 2, and the third radiator 8 in the third housing 3, if the satellite antenna is in operation, the frequency difference f46 between the fourth frequency f4 and the resonant frequency f6 of the sixth resonance can satisfy the following: f46 ≤ 10% * f6. Furthermore, the frequency difference f56 between the fifth frequency f5 and the resonant frequency f6 of the sixth resonance can satisfy the following: f56 ≤ 10% * f6. This allows adjustment of the maximum radiation direction of the pattern while still achieving circular polarization and improving the performance of the satellite antenna.

[0170] In another embodiment of the present invention, a frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies: 0≤f46≤100 MHz, illustratively, f46=50 MHz, f46=65 MHz, or f46=90 MHz, etc. In addition, a frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: 0≤f56≤100 MHz, illustratively, f56=50 MHz, f56=65 MHz, or f56=90 MHz, etc.

[0171] It is worth mentioning that in Figure 6a and Figure 6b In the embodiment shown, the third shell 3 is folded along the side of the second support surface 201 away from the flexible display screen, so that the portion of the flexible display screen located on the first support surface 101 and the second support surface 201 can be used for display, and its display surface is larger, which can provide users with a better user experience.

[0172] In some other possible embodiments of the present invention, the third shell 3 can also be folded along the side of the second support surface 201 facing the flexible display screen. In this way, while the mobile terminal can provide a larger display surface, the third shell 3 can also be used to provide the user with a certain degree of privacy.

[0173] To sum up, for a multi-fold mobile terminal, no matter whether the third radiator 8 is set on a middle shell or a side shell, when the mobile terminal is in a fully unfolded state, a first resonant structure can be set on at least one shell adjacent to the shell where the third radiator 8 is located, and the frequency corresponding to the first resonant structure is set to be higher than the working 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 set to be greater than 10%) to enhance the circular polarization gain of the satellite antenna; and other shells on the multi-fold shell can also be provided with a second resonant structure, a third resonant structure, etc., wherein the frequency corresponding to any resonant structure in the second resonant structure, the third resonant structure, etc. can be higher than the above-mentioned working frequency band, which can further enhance the circular polarization gain; or the frequency corresponding to any resonant structure in the second resonant structure, the third resonant structure, etc. can also fall within the above-mentioned working frequency band, or the frequency difference between the frequency corresponding to the arbitrary resonant structure and the resonant point frequency of the third radiator 8 is ≤10% to improve the radiation pattern of the satellite antenna.

[0174] When the mobile terminal is in a hovering state, the third radiator 8 is arranged on one of the shells in an intersecting relationship (for example, in an L-shape), and the frequency corresponding to the resonant structure on the other intersecting shell falls within the operating frequency band of the third radiator 8 (or the frequency difference with the resonant point frequency of the third radiator 8 is ≤10%). Based on the design in the hovering state, the circular polarization gain of the satellite antenna can be enhanced, and the radiation pattern can be improved; and any one of the frequencies corresponding to the resonant structures on other shells on the multi-fold shell can be higher than the operating frequency band of the third radiator 8, further enhancing the circular polarization gain of the satellite antenna, or it can also fall within the operating frequency band of the third radiator 8 (or the frequency difference with the resonant point frequency of the third radiator 8 is ≤10%) to improve the radiation pattern.

[0175] Figure 7a A schematic diagram of a distributed structure of an antenna system in a folded state of a mobile terminal provided by an embodiment of the present utility model. Figure 7a As shown, the first housing 1 includes a first supporting surface 101 for supporting the flexible display screen, the second housing 2 includes a second supporting surface 201 for supporting the flexible display screen, and the third housing 3 includes a third supporting surface 301 for supporting the flexible display screen. 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, the third housing 3 is folded to the side of the second housing 2 away from the flexible display screen.

[0176] 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 floor via another branch of the first tuning circuit to form a seventh resonant structure corresponding to the seventh frequency. The second radiator 7 is coupled to the floor via another branch of the second tuning circuit to form an eighth resonant structure corresponding to the eighth frequency. The third radiator 8 is configured to generate a ninth resonance. 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.

[0177] It is worth mentioning that the present invention does not limit the third communication frequency band of the satellite antenna. Figure 7a In the folded state shown, the satellite antenna is in the receiving state of the working frequency band; or it can be the satellite antenna in the transmitting state of the working frequency band. In addition, it can be understood that when the satellite antenna communicates with different communication satellites, the satellite antenna's receiving state of the working frequency band may be different, and the satellite antenna's transmitting state of the working frequency band may also be different. However, the antenna system provided by the present invention is Figure 7a In the folded state shown, the seventh frequency, the eighth frequency and the resonance point frequency of the third radiator 8 can be adjusted according to different application scenarios to satisfy the above-mentioned relationship, so that the radiation pattern of the satellite antenna is optimized under the joint action of the first radiator and the first tuning circuit, the second radiator and the second tuning circuit and the third radiator, and / or the gain of the satellite antenna is increased to improve the satellite communication performance of the mobile terminal.

[0178] Reference Figure 7b , Figure 7b for Figure 7a The enlarged view of the local structure at B of the structure shown. When the mobile terminal is in the folded state, the second radiator 7 can serve as a parasitic radiator of 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 shell 3, so that the satellite antenna can still meet certain communication requirements. Figure 7a In the folded state shown, its floor dimensions are slightly larger, so the satellite antenna also has some characteristics of a traveling wave antenna.

[0179] In addition, when the mobile terminal is in Figure 7aIn the state shown, in one possible embodiment, the frequency difference f79 between the seventh frequency f7 and the resonant point frequency f9 of the ninth resonance satisfies: f79>10%*f9. For example, f79 can be ≥10%*f9, so that the coupling between the first radiator 6 and the third radiator 8 causes the floor current and the current between the first radiator 6 and the third radiator 8 to generate an orthogonally polarized radiation field, 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 resonance satisfies: f79>100 MHz. For example, f79 can be ≥300 MHz, for example, f79=350 MHz, f79=500 MHz, f79=600 MHz, f79=700 MHz, or f79=1000 MHz.

[0180] The frequency difference f89 between the eighth frequency f8 and the ninth frequency f9 satisfies: f89>10%*f9. For example, f89 can be set to 10%*f9. This allows coupling between the second radiator 7 and the third radiator 8 to cause the floor current and the current between the second radiator 7 and the third radiator 8 to generate an orthogonally polarized radiation field, which is beneficial for improving the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f89 between the resonant point frequency f8 of the eighth resonance and the resonant point frequency f9 of the ninth resonance satisfies: f89>100 MHz. For example, f89 can be set to 300 MHz, for example, f89=350 MHz, f89=500 MHz, f89=600 MHz, f89=700 MHz, or f89=1000 MHz.

[0181] Figure 7c Another schematic diagram of the distributed structure of the antenna system of the mobile terminal in the folded state provided by the embodiment of the present utility model. Figure 7a The radiators in the mobile terminal shown are arranged at different positions. Figure 7b In the embodiment, the first radiator 6 is provided in the first shell 1, the second radiator 7 is provided in the second shell 2, and the third radiator 8 is provided in the third shell 3. If the satellite antenna is in operation, the third radiator 8 can generate a ninth resonance whose resonance point frequency 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. By adopting such a design, the antenna system of the mobile terminal can still reduce the decrease in the radiation efficiency of the satellite antenna caused by the folding of the third shell 3 by making the current distribution of the second radiator 7 similar to the current distribution of the third radiator 8, so that the satellite antenna can still meet certain communication requirements.

[0182] In the above-mentioned embodiments of the present invention, when the mobile terminal is in each folding 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, and 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.

[0183] Based on this, in one possible embodiment of the present invention, the mobile terminal has at least two folding states, such as the flattened state, hovering state, and folded state mentioned above. For any two folding states, when the satellite antenna is in the operating 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 ensures that the frequencies corresponding to the two resonant structures meet the usage requirements of the mobile terminal in different folding states, allowing the two resonant structures to influence the resonant mode of the resonance generated by the third radiator 8, thereby optimizing the satellite antenna's directivity pattern and improving the satellite antenna's communication performance.

[0184] In addition, it can be understood that when the mobile terminal is in the same folding state, but the three radiators are set in different positions, the first radiator 6 can also 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 between them and the resonant point frequency of the resonance generated by the third radiator 8, thereby improving the radiation efficiency of the satellite antenna.

[0185] In another possible embodiment of the present invention, the first radiator 6 can be connected to the same branch of the first tuning circuit when the mobile terminal is in different folded states. For example, the first radiator 6 can be connected to a branch that ensures the resonant frequency f of the first radiator 6 satisfies the following conditions: 2500 MHz ≤ f ≤ 2700 MHz. This allows the first radiator 6 to operate within the aforementioned fixed operating frequency band when the mobile terminal is in various folded states. This allows the mobile terminal to meet satellite communication requirements in different folded states while also simplifying the antenna system.

[0186] Consider also the process of communication between the satellite antenna and the communication satellite, that is, the process of the satellite antenna receiving and transmitting electromagnetic waves. In actual applications, the frequency of the electromagnetic waves that the satellite antenna can receive is different from the frequency of the electromagnetic waves that the satellite antenna can transmit. In a possible embodiment of the present invention, 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. Therefore, when the satellite antenna is in the transmitting state and the receiving state, the frequency corresponding to the first resonant structure can be adjusted accordingly through the corresponding branch of the first tuning circuit, so as to meet the communication requirements of the satellite antenna while also helping to improve the intelligence of the antenna system.

[0187] In another possible embodiment of the present invention, the first radiator 6 can be connected to the same branch of the first tuning circuit when the satellite antenna is in either the transmitting or receiving state. That is, the first resonant structure corresponds to the same frequency, for example, within the 2500 MHz to 2700 MHz frequency band, regardless of whether the satellite antenna is in the transmitting or receiving state. This can help simplify the antenna system while meeting the satellite communication requirements of the mobile terminal.

[0188] 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 meets the cellular communication requirements of the antenna system, thereby improving the utilization rate of the branch of the first tuning circuit.

[0189] In one possible embodiment of the present invention, when the satellite antenna is in a non-operating state, first radiator 6 is coupled to the first antenna RF link and is configured to generate a first resonance. The resonance point frequency of the first resonance is within the communication frequency band of the first antenna. In practical applications, the first antenna RF link may be a cellular RF link. When the satellite antenna is in a non-operating state, first radiator 6 functions as a radiator of the cellular antenna for cellular communications.

[0190] It is worth noting that, when the satellite antenna is in operation, the first radiator 6 and the first tuning circuit can form a resonant structure to influence the satellite antenna's directivity pattern. In one possible embodiment, the frequency corresponding to the first resonant structure when the satellite antenna is in operation can be the same as the resonant point frequency of the first resonance generated by the first radiator 6 when the satellite antenna is in non-operational state. This allows for reuse of cellular antennas and simplifies the antenna system.

[0191] In practical applications, since the operating state of the cellular antenna includes the B41 state, when the satellite antenna is in the non-operating state, the first radiator 6 can be connected to a branch of the first tuning circuit to tune the resonant point frequency of the first resonance generated by the first radiator 6 to within the frequency band corresponding to the B41 state via this branch of the first tuning circuit. When the satellite antenna is in the operating state, the first radiator 6 can still be connected to this 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.

[0192] It is understood that the first radiator 6 can also be used for other antennas and can generate a target resonance corresponding to the target frequency of the other antenna. When the first radiator 6 is used as a first resonant structure, it is sufficient as long as the target resonance meets the description of the first resonant structure in the above embodiment of the present invention.

[0193] In addition, in the present invention, when the mobile terminal is in a closed state and the satellite antenna is not operating, the resonance point frequency of the third radiator 8 can be made greater than the resonance point frequency of the resonance generated by the first radiator 6, and the resonance point frequency of the resonance generated by the second radiator 7 can be made greater than the resonance point frequency of the first radiator 6. In other words, when the mobile terminal is in a closed state and the satellite antenna is not operating, the second radiator 7 and the third radiator 8 can both serve as parasitic radiators of the first radiator 6, thereby improving the cellular communication performance of the antenna system.

[0194] It is understood that in the present invention, the mobile terminal can also control the state of the first tuning circuit via a cellular radio frequency link, so that the first radiator 6 generates corresponding resonance. In addition, the mobile terminal can control the state of the second tuning circuit via a cellular radio frequency link or a satellite link, so that the second radiator 7 generates corresponding resonance.

[0195] As can be seen from the above description, 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 the present invention, a switch component can be used to realize the switching of different branches of the first tuning circuit. Similarly, the switching components can also be used to realize the switching between different branches of the second tuning circuit. When designing specifically, please refer to Figure 8 , Figure 8This is another schematic diagram of the structure of the antenna system of a mobile terminal in a flattened state, provided by an embodiment of the present invention. In this embodiment, a first radiator 6 is disposed in the first housing 1, a third radiator 8 is disposed in the second housing 2, and a second radiator 7 is disposed in the third housing 3. Furthermore, the first tuning circuit further includes a first switch assembly 10, and the second tuning circuit further includes a second switch assembly 11. The first switch assembly includes a first switch device SW1 and a second switch device SW2, and the second switch assembly includes a third switch device SW3 and a fourth switch device SW4.

[0196] In addition, since the resonance point frequency of the third radiator 8 is different when the mobile terminal is in different folding states, in order to adjust the resonance point frequency of the third radiator 8 according to the communication requirements in different folding states, the satellite antenna further includes a third switch component 12, which is coupled to the third radiator 8. Figure 8 As shown, the third switch assembly 12 includes a fifth switching device SW5 and a sixth switching device SW6.

[0197] In an embodiment of the present invention, the mobile terminal can control the on and off state of the third switch component 12 via, but is not limited to, 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 the first feed point to switch the satellite antenna between a receiving state and a transmitting state. For example, when the third switch component 12 is in the first on state, the satellite antenna is in the receiving state; and when the third switch component 12 is in the second on state, the satellite antenna is in the transmitting state.

[0198] It is understandable that, in practical applications, the switching states of the switching devices in each switch assembly can be adjusted to connect each radiator to a different circuit branch, thereby causing each radiator to generate corresponding resonance.

[0199] It is worth mentioning that Figure 8 As shown, in this embodiment of the present invention, the switch components with inductors connected in parallel with the floor can be used to increase the resonant frequency of the radiator, while the switch components with cross-slot capacitance can be used to decrease the resonant frequency of the radiator. In other embodiments of the present invention, the switch components can also adopt other possible designs to achieve the function of adjusting the resonant frequency of the radiator. These are not listed here, but they should all be understood to fall within the scope of protection of the present invention.

[0200] In addition, in the above-mentioned switching devices, the cross-slot 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 play a role in increasing the radiation aperture to enhance the gain of the satellite antenna, thereby increasing the beam width of the radiation pattern.

[0201] In a specific embodiment, Figure 8 In the flattened state shown, when the first switch SW1 is in the first state, the second switch SW2 is in the first state, the third switch SW3 is in the first state, the fourth switch SW4 is in the first state, the fifth switch SW5 is in the first state, and the sixth switch SW6 is 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 switch assembly 10 modulates the frequency corresponding to the first resonant structure to an operating frequency band of 2500 MHz to 2700 MHz, and the second switch assembly 11 modulates the frequency corresponding to the second resonant structure to a frequency higher than the aforementioned communication frequency band.

[0202] Figure 9 The embodiment of the present utility model provides Figure 8 The schematic diagram of the direction diagram of the satellite antenna of the mobile terminal when it is in the transmitting state. Figure 9 It can be seen that by adopting the design scheme of the antenna system provided by the utility model, the beam angle α of the directional pattern of the satellite antenna of the mobile terminal can reach more than 15°, that is, the beam width of the directional pattern can reach more than ±15°, for example, it can reach ±20°, or even ±30°, which can meet the satellite communication requirements of the mobile terminal in the flattened state.

[0203] You can continue to refer to Figure 8 When the first switch SW1 is in the second state, the second switch SW2 is in the second state, the third switch SW3 is in the second state, the fourth switch SW4 is in the second state, the fifth switch SW5 is in the second state, and the sixth switch SW6 is 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 switch component 10 modulates the frequency corresponding to the first resonant structure to an operating frequency band of 2500 MHz to 2700 MHz, and the second switch component 11 modulates the frequency corresponding to the second resonant structure to a frequency higher than the aforementioned communication frequency band.

[0204] In addition, it has been verified that when the satellite antenna is in the receiving state, the beam angle α of its radiation pattern can also reach more than 15°, which can still meet the satellite communication requirements of the mobile terminal in the flattened state.

[0205] In addition, when the mobile terminal is in Figure 6a In the hovering state 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 switch SW1 is in the third state, the second switch SW2 is in the third state, the third switch SW3 is in the third state, the fourth switch SW4 is in the third state, the fifth switch SW5 is in the third state, and the sixth switch SW6 is in the third state, the satellite antenna is in the transmitting state. At this time, the resonant point frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the transmitting state. The frequency corresponding to the first resonant structure is modulated to an operating frequency band of 2500MHz to 2700MHz by the first switch component 10, and the frequency corresponding to the second resonant structure is modulated to a position higher than the above-mentioned communication frequency band by the second switch component 11.

[0206] Figure 10 The embodiment of the present utility model provides Figure 6a Schematic diagram of the directional pattern of the satellite antenna of the mobile terminal when it is in the transmitting state. Figure 10 It can be seen that by adopting the design of the antenna system provided by the present invention, when the mobile terminal is in a hovering state, the beam angle α of the satellite antenna's directional pattern can also reach more than 15°, that is, the beam width of the directional pattern can reach more than ±15°, for example, it can reach ±20°, or even ±30°, which can meet the satellite communication requirements of the mobile terminal in the hovering state.

[0207] Furthermore, when the first switch SW1 is in the fourth state, the second switch SW2 is in the fourth state, the third switch SW3 is in the fourth state, the fourth switch SW4 is in the fourth state, the fifth switch SW5 is in the fourth state, and the sixth switch SW6 is 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 switch component 10 modulates the frequency corresponding to the first resonant structure to an operating frequency band of 2500 MHz to 2700 MHz, and the second switch component 11 modulates the frequency corresponding to the second resonant structure to within the aforementioned communication frequency band.

[0208] 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 also reach more than 15°, which can meet the satellite communication requirements of the mobile terminal in the hovering state.

[0209] For example, when the mobile terminal is in Figure 7aIn 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, when the first switch SW1 is in the fifth state, the second switch SW2 is in the fifth state, the third switch SW3 is in the fifth state, the fourth switch SW4 is in the fifth state, the fifth switch SW5 is in the fifth state, and the sixth switch SW6 is in the fifth state, the satellite antenna is in the transmitting state. At this time, the resonant point frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the transmitting state. The frequency corresponding to the first resonant structure is modulated to an operating frequency band of 2500MHz to 2700MHz by the first switch component 10, and the frequency corresponding to the second resonant structure is modulated to the aforementioned communication frequency band by the second switch component 11.

[0210] Figure 11 The embodiment of the present utility model provides Figure 7a Schematic diagram of the directional pattern of the satellite antenna of the mobile terminal when it is in the transmitting state. Figure 11 It can be seen that by adopting the design of the antenna system provided by the present invention, when the mobile terminal is in a folded state, the beam angle α of the satellite antenna's directional pattern can also meet regulatory requirements, and its beam width can reach ±15°, for example, which can meet the satellite communication requirements of the mobile terminal in a hovering state.

[0211] Furthermore, when the first switch SW1 is in the sixth state, the second switch SW2 is in the sixth state, the third switch SW3 is in the sixth state, the fourth switch SW4 is in the sixth state, the fifth switch SW5 is in the sixth state, and the sixth switch SW6 is 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 switch component 10 modulates the frequency corresponding to the first resonant structure to an operating frequency band of 2500 MHz to 2700 MHz, and the second switch component 11 modulates the frequency corresponding to the second resonant structure to within the aforementioned communication frequency band.

[0212] 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 also reach 15°, which can meet the satellite communication requirements of the mobile terminal in the folded state.

[0213] In summary, the antenna system of the mobile terminal provided by the embodiment of the present invention 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 folding state of the mobile terminal, the setting position of each radiator and the working state of the satellite antenna, so that the first resonant structure and the second resonant structure can affect the resonant mode of the resonance of the third radiator, so that the satellite antenna can generate a target radiation pattern, which is beneficial to the optimization of the radiation pattern of the satellite antenna, thereby improving the radiation efficiency of the satellite antenna.

[0214] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A mobile terminal, characterized in that: The invention comprises a first shell (1), a second shell (2), a third shell (3), a first rotating shaft mechanism (4), a second rotating shaft mechanism (5), and an antenna system, wherein the first shell (1) and the second shell (2) are rotationally connected via the first rotating shaft mechanism (4), and the second shell (2) and the third shell (3) are rotationally connected via the second rotating shaft mechanism (5), wherein: The antenna system includes a satellite antenna, the satellite antenna includes a satellite radio frequency link, 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; the first radiator (6), the second radiator (7) and the third radiator (8) are respectively arranged in different shells; 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; When the satellite antenna is in operation, 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 a target radiation pattern of the satellite antenna.

2. The mobile terminal according to claim 1, wherein: When the mobile terminal is in a flattened state and the third radiator (8) is arranged on the second housing (2), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency; the third radiator (8) is used to generate a third resonance, wherein the resonant point frequencies of the first frequency and 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.

3. The mobile terminal according to claim 1, wherein: When the mobile terminal is in a flattened state and the third radiator (8) is arranged on the second housing (2), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure 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 resonance point frequency f3 of the third resonance satisfies: f13≤10%*f3, and the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3.

4. The mobile terminal according to claim 3, wherein: A frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies: 0≤f13≤100 MHz; a frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>100 MHz.

5. The mobile terminal according to claim 1, wherein: When the mobile terminal is in a flattened state and the third radiator (8) is arranged on the second housing (2), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency; the third radiator (8) is used to generate a third resonance, wherein the resonant point 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 according to claim 5, wherein: When the mobile terminal is in a flattened state and the third radiator (8) is arranged on the second housing (2), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure 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 resonance point frequency f3 of the third resonance satisfies: f13>10%*f3, and the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3.

7. The mobile terminal according to claim 1, wherein: When the mobile terminal is in a flattened state, and the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), and the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency; the third radiator (8) is used to generate a third resonance, wherein the resonance point 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.

8. The mobile terminal according to claim 7, wherein: When the mobile terminal is in a flattened state and the third radiator (8) is arranged on the second housing (2), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure 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 resonance point frequency f3 of the third resonance satisfies: f13>10%*f3, and the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3.

9. The mobile terminal according to claim 1, wherein: When the mobile terminal is in a flattened state, and the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), and the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency; the third radiator (8) is used to generate a third resonance, wherein the resonant point frequencies of the first frequency and 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.

10. The mobile terminal according to claim 1, wherein: When the mobile terminal is in a flattened state, and the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), and the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, and the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to a first frequency; The second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency; the third radiator (8) is used to generate a third resonance. Among them, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies: f13≤10%*f3, and the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3.

11. The mobile terminal according to any one of claims 1 to 10, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), and the third radiator (8) is arranged on the second shell (2), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a fourth resonant structure, and the fourth resonant structure corresponds to a fourth frequency; the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form a fifth resonant structure, and the fifth resonant structure corresponds to a fifth frequency; the third radiator (8) is used to generate a sixth resonance, wherein the resonant point frequencies of the fifth frequency and the sixth resonance are within the second communication frequency band of the satellite antenna; and the fourth frequency is higher than the second communication frequency band.

12. The mobile terminal according to any one of claims 1 to 10, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), and the third radiator (8) is arranged on the second shell (2), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a fourth resonant structure, and the fourth resonant structure corresponds to a fourth frequency; the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form a fifth resonant structure, and the fifth resonant structure corresponds to a fifth frequency; the third radiator (8) is used to generate a sixth resonance, wherein a frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46>10%*f6, and a frequency difference f56 between the fifth frequency f5 and the resonant point frequency f6 of the sixth resonance satisfies: f56≤10%*f3.

13. The mobile terminal according to claim 12, wherein: A frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies: f46>100 MHz; a frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: 0≤f56≤100 MHz.

14. The mobile terminal according to any one of claims 1 to 10, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), and the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), and the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a fourth resonant structure, and the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form a fifth resonant structure, and the fifth resonant structure corresponds to a fifth frequency, and the third radiator (8) is used to generate a sixth resonance; wherein the resonant point frequencies of the fifth frequency and the sixth resonance are within the second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band.

15. The mobile terminal according to any one of claims 1 to 10, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), and the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), and the third radiator (8) is arranged on the third shell (3), the satellite antenna is in a working state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, and the third radiator (8) is used to generate a sixth resonance; wherein a frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46>10%*f6, and a frequency difference f56 between the fifth frequency f5 and the resonant point frequency f6 of the sixth resonance satisfies: f56≤10%*f6.

16. The mobile terminal according to any one of claims 1 to 10, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), and the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), and the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a fourth resonant structure, and the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form a fifth resonant structure, and the fifth resonant structure corresponds to a fifth frequency, and the third radiator (8) is used to generate a sixth resonance; wherein 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.

17. The mobile terminal according to any one of claims 1 to 10, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), and the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), and the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, and the third radiator (8) is used to generate a sixth resonance; wherein a frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46≤10%*f6, and a frequency difference f56 between the fifth frequency f5 and the resonant point frequency f6 of the sixth resonance satisfies: f56≤10%*f6.

18. The mobile terminal according to any one of claims 11 to 17, wherein: An included angle α between the third supporting surface and the second supporting surface satisfies: 45°≤α≤135°.

19. The mobile terminal according to any one of claims 1 to 18, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar and the third supporting surface (301) is opposite to the second supporting surface (201), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a seventh resonant structure, and the seventh resonant structure corresponds to a seventh frequency, the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form an eighth resonant structure, and the eighth resonant structure corresponds to an eighth frequency, and the third radiator (8) is used to generate a ninth resonance, wherein the resonance 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.

20. The mobile terminal according to any one of claims 1 to 18, wherein: The first housing (1) comprises a first supporting surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second supporting surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third supporting surface (301) for supporting the flexible display screen (200); When the first supporting surface (101) and the second supporting surface (201) are coplanar and the third supporting surface (301) is opposite to the second supporting surface (201), the satellite antenna is in a working state, the first radiator (6) is coupled to the floor through another branch of the first tuning circuit to form a seventh resonant structure, and the seventh resonant structure corresponds to a seventh frequency, the second radiator (7) is coupled to the floor through another branch of the second tuning circuit to form an eighth resonant structure, and the eighth resonant structure corresponds to an eighth frequency, and the third radiator (8) is used to generate a ninth resonance, wherein a frequency difference f79 between the seventh frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies: f79>10%*f9, and a frequency difference f89 between the eighth frequency f8 and the resonance point frequency f9 of the ninth resonance satisfies: f89>10%*f9.

21. The mobile terminal according to claim 20, wherein: A frequency difference f79 between the seventh frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies: f79>100 MHz, and a frequency difference f89 between the eighth frequency f8 and the resonance point frequency f9 of the ninth resonance satisfies: f89>100 MHz.

22. The mobile terminal according to any one of claims 1 to 21, wherein: The satellite antenna also includes a first feeding point (9), and the satellite radio frequency link is coupled to the third radiator (8) through the first feeding point (9); when the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the third shell (3), and the third radiator (8) is arranged on the second shell (2), the distance between the first feeding point (9) and the axis of the first rotating shaft mechanism (4) is greater than the distance between the first feeding point (9) and the axis of the second rotating shaft mechanism (5).

23. The mobile terminal according to any one of claims 1 to 22, wherein: The satellite antenna further comprises a third switch component (12), wherein the third switch component (12) is coupled to the third radiator (8); When the third switch component (12) is in a first conduction state, the satellite antenna is in a transmitting state; when the third switch component (12) is in a second conduction state, the satellite antenna is in a receiving state.

24. The mobile terminal according to claim 23, wherein: When the satellite antenna is in a transmitting state, the first radiator (6) is connected to the first branch of the first tuning circuit; When the satellite antenna is in a receiving state, the first radiator (6) is connected to the second branch of the first tuning circuit.

25. The mobile terminal according to claim 24, wherein: When the satellite antenna is in a transmitting state or a receiving state, the first radiator is connected to the same branch of the first tuning circuit.

26. The mobile terminal according to any one of claims 1 to 25, wherein: The mobile terminal has at least two folding states. For any two of the folding states, when the satellite antenna is in working state, the first radiator is respectively connected to different branches of the first tuning circuit, and the second radiator is respectively connected to different branches of the second tuning circuit.

27. The mobile terminal according to any one of claims 1 to 25, wherein: When the mobile terminal is in different folding states and the satellite antenna is in 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.

28. The mobile terminal according to any one of claims 1 to 27, wherein: When the satellite antenna is in a non-working state, the first radiator is coupled to the first antenna radio frequency link and is used to generate a first resonance, and the resonance point frequency of the first resonance is within the communication frequency band of the first antenna.

29. The mobile terminal according to claim 28, wherein: The mobile terminal controls the state of the first tuning circuit via a cellular radio frequency link.

30. The mobile terminal according to any one of claims 1 to 29, wherein: The mobile terminal controls the state of the second tuning circuit via a cellular radio frequency link or a satellite radio frequency link.

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