Mobile terminal

Abstract

The invention provides a mobile terminal. The mobile terminal comprises three shells and an antenna system, wherein the three shells are rotationally connected in sequence. 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 application is a divisional application. The application number of the original application is 202410981902.1, and the original application date is July 19, 2024. The entire contents of the original application are incorporated into this application by reference.

[0002] This application claims the priority of the Chinese patent application filed with the China Patent Office 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 in this application. Technical Field

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

[0004] With the development of human society, mobile terminals such as mobile phones have become an indispensable tool in people's lives. People's dependence on mobile terminals has affected all aspects of life. With the rise of technology that mobile terminals use communication satellites to achieve communication, people's actual demand for the use of communication satellite communications for mobile terminals is getting stronger and stronger.

[0005] In order to achieve communication using communication satellites, it is first necessary to establish a communication connection between the satellite antenna of the mobile terminal and the communication satellite, and the directional pattern of the satellite antenna is one of the factors that affect the communication connection speed and connection stability. For mobile terminals of different forms, such as straight-type terminal products and foldable terminal products, and foldable terminal products in different folding states, they usually have different floor sizes, and different floor sizes have different effects on the directional pattern. Therefore, the satellite antenna can be designed by analyzing the directional patterns of satellite antennas of mobile terminals with different floor sizes, so as to achieve the purpose of improving the satellite communication performance of the mobile terminal. Summary of the invention

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

[0007] The mobile terminal provided by the present application includes a first shell, a second shell, a third shell, a first rotating shaft mechanism, a second rotating shaft mechanism and an antenna system. The first shell and the second shell are rotationally connected by the first rotating shaft mechanism, and the second shell and the third shell are rotationally connected by the second rotating shaft mechanism. The antenna system includes a satellite antenna, and the satellite antenna includes a satellite radio frequency link, a first radiator, a second radiator, a third radiator, a first tuning circuit and a second tuning circuit, wherein 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. In addition, the first radiator, the second radiator and the third radiator are respectively arranged in different shells. And 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 application, when the satellite antenna is in working state, the first radiator and the first tuning circuit, the second radiator and the second tuning circuit, and the third radiator are used to jointly generate the target radiation pattern of the satellite antenna. In this way, a resonant structure can be formed through the first tuning circuit and the first radiator, and another resonant structure can be formed through 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 increasing the gain of the satellite antenna, thereby improving the communication performance of the satellite antenna.

[0008] By adopting the design of the antenna system provided in the present application, the first radiator can be connected to the corresponding branch of the first tuning circuit, and the second radiator can be connected to the corresponding branch of the second tuning circuit according to the 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.

[0009] Specifically, when the mobile terminal is in a flattened state and the third radiator is arranged on the second shell, if the satellite antenna is in a working 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 resonance structure, and the first resonance structure corresponds to the first frequency. In addition, the third radiator is used to generate a third resonance. Among them, the resonance 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. In this way, through the coupling between the first radiator and the third radiator, the current of the third radiator can flow to the first radiator and go to the ground, so as to curb the current of the third radiator, thereby making the radiation pattern of the satellite antenna tilt toward one side of the third shell. In addition, through the coupling between the second radiator and the third radiator, the resonant current generated by the third radiator can flow more to the second radiator, and then flow to the floor. Since the floor size of the mobile terminal is larger 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 requirements for star alignment, thereby improving the communication performance of the satellite antenna.

[0010] In practical applications, when the mobile terminal is in a flattened state and the third radiator is arranged in the second shell, if the satellite antenna is in a working state, the first radiator 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 the first frequency. The second radiator 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 the second frequency. The third radiator 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 can satisfy: f13≤10%*f3, so as to curb the current of the third radiator through the coupling between the first radiator and the third radiator. In addition, the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance can also satisfy: 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 the coupling between the second radiator and the third radiator, thereby improving the circular polarization gain of the satellite antenna.

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

[0012] In another possible implementation of the present application, 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 working 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 a first frequency. In addition, the third radiator is used to generate a third resonance. Among them, 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. 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 frame radiators, thereby improving the communication performance of the satellite antenna.

[0013] In practical applications, when the mobile terminal is in a flattened state and the third radiator is disposed in the second shell, if the satellite antenna is in operation, the first radiator 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 the first frequency. The second radiator 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 the second frequency. The third radiator 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, so that the floor current and the current between the first radiator and the third radiator generate an orthogonal polarization radiation field through the coupling between the first radiator and the third radiator, 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 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.

[0014] 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.

[0015] In another possible implementation of the present application, when the mobile terminal is in a flattened state, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the third shell, if the satellite antenna is in a working state, the first radiator can be 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 the first frequency; the second radiator can be 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 the second frequency. In addition, the third radiator is used to generate a third resonance. Among them, 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. In this way, the first resonant structure formed by the first radiator through the first tuning circuit and the second resonant structure formed by the second radiator through the second tuning circuit can both have a greater impact on the resonant mode of the resonance generated by the third radiator, so as to achieve the purpose of adjusting the directional diagram of the satellite antenna and the circular polarization gain of the satellite antenna, thereby being conducive to improving the communication performance of the satellite antenna.

[0016] In practical applications, when the mobile terminal is in a flattened state, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the third shell, if the satellite antenna is in a working state, the first radiator can be 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 the first frequency; the second radiator can be 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 the second frequency. In addition, the third radiator 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, so that the current between the first radiator and the third radiator and the floor current 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 satisfies: f23>10%*f3, so that the circuit between the second radiator and the third radiator and the floor current generate an orthogonal polarization radiation field, thereby enhancing the circular polarization gain of the satellite antenna.

[0017] In a 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.

[0018] In a possible embodiment of the present application, when the mobile terminal is in a flattened state, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the third shell, if the satellite antenna is in a working state, the first radiator 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 the first frequency. The second radiator 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 the second frequency. The third radiator is used to generate a third resonance, wherein the resonance 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. In this way, the maximum radiation direction of the satellite antenna's directional pattern can be adjusted while improving the circular polarization gain of the satellite antenna.

[0019] In practical applications, when the mobile terminal is in a flattened state, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the third shell, if the satellite antenna is in working state, the first radiator can be 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 the first frequency; the second radiator can be 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 the second frequency. In addition, the third radiator 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, so as to curb the current of the third radiator through the coupling between the first radiator and the third radiator, thereby adjusting the maximum radiation direction of the directional diagram. 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.

[0020] In a 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.

[0021] In the mobile terminal provided in the present application, the first shell includes a first support surface for supporting a flexible display screen, the second shell includes a second support surface for supporting a flexible display screen, and the third shell includes a third support surface for supporting a flexible display screen. When the first support surface and the second support surface are coplanar, the third support surface intersects with the second support surface, and the third radiator is arranged on the second shell, that is, when the mobile terminal is in a hovering state, if the satellite antenna is in a working state, the first radiator 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 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 is used to generate a sixth resonance, wherein the resonance 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. When the mobile terminal is in this hovering state, due to the large size of its floor, and the current of the satellite antenna can be vertically distributed on the floor, thereby realizing circular polarization, it is beneficial to improve the performance of the satellite antenna.

[0022] In practical applications, the first shell includes a first supporting surface for supporting the flexible display screen, the second shell includes a second supporting surface for supporting the flexible display screen, and the third shell includes a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface intersects with the second supporting surface, and the third radiator is arranged in the second shell, that is, when the mobile terminal is in a hovering state, if the satellite antenna is in a working state, the first radiator 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 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 is used to generate a sixth resonance, wherein the frequency difference f46 between the resonance point frequency f4 of the fourth resonance and the resonance point frequency f6 of the sixth resonance satisfies: f46>10%*f6, so that the floor current and the current between the first radiator and the third radiator generate an orthogonal polarization radiation field through the coupling between the first radiator and the third radiator, 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.

[0023] In a possible implementation, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance may satisfy: f46>100 MHz. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance may satisfy: 0≤f56≤100 MHz.

[0024] In another possible implementation of the present application, in the mobile terminal provided by the present application, the first shell includes a first support surface for supporting a flexible display screen, the second shell includes a second support surface for supporting a flexible display screen, and the third shell includes a third support surface for supporting a flexible display screen. When the first support surface and the second support surface are coplanar, the third support surface intersects with the second support surface, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the second shell, the satellite antenna is in a working state, the first radiator 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 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 is used to generate a sixth resonance, wherein the resonance 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. When the mobile terminal is in this hovering state, due to the large size of its floor, and the current of the satellite antenna can be vertically distributed on the floor, thereby realizing circular polarization, it is beneficial to improve the performance of the satellite antenna.

[0025] In practical applications, the first shell includes a first supporting surface for supporting the flexible display screen, the second shell includes a second supporting surface for supporting the flexible display screen, and the third shell includes a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface intersects with the second supporting surface, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the second shell, the satellite antenna is in a working state, the first radiator 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 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 is used to generate a sixth resonance, wherein the frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46>10%*f6, so that the floor current and the first radiator and the third radiator generate orthogonal polarization radiation fields through coupling between the first radiator and the third radiator, thereby enhancing the circular polarization gain of the satellite antenna. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f6, so as to curb the current of the third radiator through the coupling between the second radiator and the third radiator, thereby adjusting the maximum radiation direction of the directional diagram, so as to improve the circular polarization characteristics of the satellite antenna in the hovering state, thereby improving the communication performance of the satellite antenna.

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

[0027] In a possible implementation of the present application, the first shell includes a first support surface for supporting a flexible display screen, the second shell includes a second support surface for supporting a flexible display screen, and the third shell includes a third support surface for supporting a flexible display screen. When the first support surface and the second support surface are coplanar, the third support surface intersects with the second support surface, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the second shell, the satellite antenna is in a working state, the first radiator 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 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 is used to generate a sixth resonance, wherein the resonance 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. In this way, the current of the satellite antenna can still be vertically distributed on the floor, thereby realizing circular polarization, so it is beneficial to the improvement of the performance of the satellite antenna, and at the same time, the maximum radiation direction of the directional pattern can be adjusted.

[0028] In practical applications, the first shell includes a first supporting surface for supporting the flexible display screen, the second shell includes a second supporting surface for supporting the flexible display screen, and the third shell includes a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface intersects with the second supporting surface, and the first radiator is arranged in the first shell, the second radiator is arranged in the second shell, and the third radiator is arranged in the second shell, the satellite antenna is in a working state, the first radiator 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 the fourth frequency; the second radiator 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 the fifth frequency; the third radiator is used to generate the sixth resonance, wherein the frequency difference f46 between the fourth frequency f4 and the resonant point frequency f6 of the sixth resonance satisfies: f46≤10%*f6. In addition, the frequency difference f56 between the fifth frequency f5 and the resonant point frequency f6 of the sixth resonance satisfies: 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 radiation pattern.

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

[0030] 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=90°.

[0031] In another possible implementation of the present application, the first shell includes a first support surface for supporting a flexible display screen, the second shell includes a second support surface for supporting a flexible display screen, and the third shell includes a third support surface for supporting a 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 working state, the first radiator 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 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, and the eighth resonant structure corresponds to the eighth frequency. The third radiator is used to generate a ninth resonance. Among them, the resonance point frequency of the ninth resonance is within the third communication frequency band of the satellite antenna, the resonance point frequency of the seventh resonance is higher than the third communication frequency band, and the resonance 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.

[0032] In addition, when the mobile terminal is in the above-mentioned folded state, the third radiator can be set in the second shell, or in the third shell or the first shell. In both cases, the second radiator can be used as a parasitic radiator of the third radiator to reduce the decrease in the radiation efficiency of the satellite antenna caused by the folding of the third shell, so that the satellite antenna can still meet certain communication requirements.

[0033] In practical applications, the first shell includes a first supporting surface for supporting the flexible display screen, the second shell includes a second supporting surface for supporting the flexible display screen, and the third shell includes a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, and the third supporting surface is opposite to the second supporting surface, that is, when the mobile terminal is in a folded state, if the satellite antenna is in a working state, the first radiator 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 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, and the eighth resonant structure corresponds to the eighth frequency. The third radiator is used to generate a ninth resonance. Among them, the frequency difference f79 between the seventh frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies: f79>10%*f9, so that the floor current and the current between the first radiator and the third radiator generate an orthogonal polarization radiation field through the coupling between the first radiator and the third radiator, thereby enhancing the circular polarization gain of the satellite antenna. In addition, the frequency difference f89 between the eighth frequency f8 and the resonance point frequency f9 of the ninth resonance satisfies: f89>10%*f9, so that the floor current and the current between the first radiator and the third radiator generate an orthogonal polarization radiation field through the coupling between the second radiator and the third radiator, thereby enhancing the circular polarization gain of the satellite antenna. In this way, the effect of the decrease in the radiation efficiency of the satellite antenna caused by the folding of the third shell can be reduced, so that the satellite antenna can still meet certain communication requirements.

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

[0035] In the present application, the satellite antenna also includes a first feeding point, and the satellite radio frequency link can be coupled and connected with the third radiator through the first feeding point. Then, when the first radiator is arranged in the first shell, the second radiator is arranged in the third shell, and the third radiator is arranged in the second shell, the distance between the first feeding point and the axis of the first rotating shaft structure is greater than the distance between the first feeding point and the axis of the second rotating shaft mechanism. This can help strengthen the directional pattern of the satellite antenna in the direction of the third shell, thereby obtaining the desired directional pattern, which is conducive to improving the radiation efficiency of the satellite antenna.

[0036] In a possible implementation of the present application, the satellite antenna further includes a third switch component, which is coupled to the third radiator, so that the satellite antenna can be switched between a transmitting state and a receiving state by switching the conduction state of the third switch component. Exemplarily, when the third switch component is in a first conduction state, the satellite antenna is in a transmitting state; and when the third switch component is in a second conduction state, the satellite antenna is in a receiving state.

[0037] In addition, when the satellite antenna is in the transmitting state, the first radiator can be connected to the first branch of the first tuning circuit. When the satellite antenna is in the receiving state, the first radiator 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 first radiator can be controlled accordingly through the corresponding branches of the first tuning circuit, so as to meet the communication requirements of the satellite antenna and improve the intelligence of the antenna system.

[0038] In another possible implementation of the present application, when the satellite antenna is in the transmitting state or the receiving state, the first radiator can be connected to the same branch of the first tuning circuit, which can meet the satellite communication requirements of the mobile terminal and simplify the antenna system.

[0039] As described above, the mobile terminal provided by the present application has at least two folding states. For any two folding states, when the satellite antenna is in the working state, the first radiator can be respectively connected to different branches of the first tuning circuit, and the second radiator can be respectively connected to different branches of the second tuning circuit. So that the first frequency corresponding to the first resonant structure formed by the first radiator through the first tuning circuit and the second frequency corresponding to the second resonant structure formed by the second radiator through the second tuning circuit meet the relationship between the resonance point frequency and 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.

[0040] In another possible implementation, when the mobile terminal is in different folding states and the satellite antenna is in working state, the first radiator can be connected to the same branch of the first tuning circuit. Exemplarily, the first radiator can be connected to a branch for making the resonance point frequency f of the first radiator satisfy: 2500MHz≤f≤2700MHz, so that when the mobile terminal is in various folding states, the first radiator can work in the above fixed working frequency band. In this way, the satellite communication requirements of the mobile terminal in different folding states can be met, and the antenna system can be simplified.

[0041] In the present application, 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, which can be understood as controlling the state of the first tuning circuit through a radio frequency link of a fixed working frequency band when the mobile terminal is in different folding states. Exemplarily, the antenna system can also include a cellular radio frequency link, and the mobile terminal can control the state of the first tuning circuit through the cellular radio frequency link, so that the first tuning circuit controls the first radiator to work within the above-mentioned fixed working frequency band.

[0042] In a possible implementation of the present application, 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, and 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, and then when the satellite antenna is in a non-operating state, the first radiator is used 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 affect the directional pattern of the satellite antenna. It can be 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 resonance point frequency of the first resonance generated by the first radiator when the satellite antenna is in a non-operating state, thereby enabling the reuse of cellular antennas to achieve the purpose of simplifying the antenna system.

[0043] In addition, in the present application, the mobile terminal can control the state of the second tuning circuit through a cellular radio frequency link or a satellite link to make the second radiator produce corresponding resonance.

[0044] In another possible implementation of the present application, the antenna system further includes a cellular radio frequency link, the first radiator includes a second feeding point, and the cellular radio frequency link is coupled to the second feeding point. When the mobile terminal is in a closed state and the satellite antenna is in a non-operating state, the second radiator is used as a radiator of the cellular antenna, and at this time, the resonance point frequency of the third radiator can be greater than the resonance point frequency of the first radiator, and the resonance point frequency of the second radiator is greater than the resonance point frequency of the first radiator. In this way, the second radiator and the third radiator can both be used as parasitic radiators of the first radiator to improve the resonance efficiency of the first radiator, thereby improving the cellular communication performance of the antenna system. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0046] Figure 2 A schematic diagram of a structure of a mobile terminal provided in an embodiment of the present application in a flattened state;

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

[0048] Figure 4 A schematic diagram of the structure of a mobile terminal in a flattened state provided in an embodiment of the present application;

[0049] Figure 5a A schematic diagram of the distributed structure of the antenna system when the mobile terminal provided in the embodiment of the present application is in a flattened state;

[0050] Figure 5bA schematic diagram of another distributed structure of the antenna system when the mobile terminal provided in an embodiment of the present application is in a flattened state;

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

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

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

[0054] Figure 7b for Figure 7a An enlarged view of the local structure at B of the structure shown;

[0055] Figure 7c A schematic diagram of another distributed structure of an antenna system of a mobile terminal in a folded state provided in an embodiment of the present application;

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

[0057] Fig. 9 Provided in the embodiments of this application 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;

[0058] Fig.10 Provided in the embodiments of this application 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;

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

[0060] Reference numerals:

[0061] 100-foldable bracket; 1-first shell; 101-first support surface; 2-second shell; 201-second support surface; 3-third shell;

[0062] 301-third supporting surface; 4-first rotating shaft mechanism; 5-second rotating shaft mechanism;

[0063] 6-first radiator; 7-second radiator; 8-third radiator; 9-first feeding point; 10-first switch component;

[0064] SW1-first switch device; SW2-second switch device; 11-second switch component; SW3-third switch device; C1-first capacitor;

[0065] SW4-fourth switch device; 12-third switch component; SW5-fifth switch device; C2-second capacitor; SW6-sixth switch device;

[0066] 200-Flexible display. DETAILED DESCRIPTION

[0067] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0068] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0069] References to "one embodiment" or "a specific embodiment" described in this specification mean that one or more embodiments of the present application include a particular feature, structure or characteristic described in conjunction with the embodiment. The terms "include", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0070] In order to facilitate understanding of the mobile terminal provided in the embodiment of the present application, its application scenario is first introduced below.

[0071] Figure 1 FIG. 1 is a schematic diagram of a mobile terminal performing satellite communication in an embodiment of the present application. Figure 1As shown in the figure, communication satellite communication belongs to non-terrestrial network (NTN) communication and can be used to communicate with mobile terminals. Compared with terrestrial communication, communication satellite communication can provide a wider coverage range. Especially for areas where cellular communication base stations are less or difficult to cover, communication satellites can be used for communication. According to the orbital altitude of the satellite, the satellite communication system can be divided into the following three types: geostationary earth orbit (GEO) satellite communication system (also known as synchronous orbit communication satellite), medium earth orbit (MEO) satellite communication system and low earth orbit (LEO) satellite communication system. The orbital altitude of GEO satellite is 35786km. Its main advantage is that it can remain stationary relative to the ground and can provide a large coverage area. The orbital altitude of MEO satellite is between 2000 and 35786km. The advantage is that global coverage can be achieved with a relatively small number of satellites. Combining the advantages and disadvantages of MEO satellite communication, at present, MEO satellites are mainly used for positioning and navigation. The orbital altitude of LEO satellites is in the range of 300 to 2000 km. LEO satellites have lower orbital altitudes than MEO and GEO satellites, and have the advantages of small data propagation delay, small transmission loss, and relatively low launch cost.

[0072] As satellite communication technology matures, it is gradually applied to various types of mobile terminals. For example, a satellite antenna can be provided in a currently popular foldable mobile terminal product to realize the satellite communication function of the foldable mobile terminal.

[0073] At present, in order to simultaneously 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 or even four-fold or five-fold are gradually used in people's daily lives. Figure 2 , Figure 2 A structural schematic diagram of a mobile terminal provided in an embodiment of the present application in a flattened state. The mobile terminal may include a foldable bracket 100 and a flexible display screen 200, and the flexible display screen 200 is mounted on the foldable bracket 100. In addition, in the flattened state, the flexible display screen 200 is in a fully unfolded state, and the display area of ​​the mobile terminal is the largest at this time.

[0074] You can continue to refer to Figure 2The foldable bracket 100 of the mobile terminal may include three shells and two hinge mechanisms. For the convenience of description, the three shells are named as the first shell 1, the second shell 2 and the third shell 3, and the two hinge mechanisms are named as the first hinge mechanism 4 and the second hinge mechanism 5. 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 rotatably connected through 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 rotatably connected through 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, so that the mobile terminal can be closed and unfolded according to different usage scenarios.

[0075] In order to achieve communication using communication satellites, it is first necessary to establish a communication connection between the satellite antenna of the mobile terminal and the communication satellite, and the directional pattern of the satellite antenna is one of the factors that affect the communication connection speed and connection stability. For mobile terminals of different forms, such as foldable terminal products in different folding states, they usually have different floor sizes, and different floor sizes have different effects on the directional pattern. Therefore, the satellite antenna can be designed by analyzing the directional patterns of satellite antennas of mobile terminals with different floor sizes, so as to achieve the purpose of improving the satellite communication performance of the mobile terminal.

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

[0077] In the present application, 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 application, the foldable mobile terminal is described as a mobile phone as an example.

[0078] In the present application, the first shell 1, the second shell 2 and the third shell 3 can respectively form installation spaces for installing electronic components such as circuit boards, batteries, receivers, speakers or cameras 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, circuit boards, receivers, speakers, cameras and other electronic components. In one possible design, at least two of the first shell 1, the second shell 2 and the third shell 3 are provided with installation spaces to distribute the components of the mobile terminal in each shell. In another possible design, only one of 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.

[0079] 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 application, 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 (mini organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot light-emitting diode (QLED) display screen, etc.

[0080] In addition, in order to facilitate the understanding of the present application, the terms that may appear in the embodiments of the present application are explained below.

[0081] Since the foldable mobile terminal includes multiple forms during use, for example, the foldable mobile terminal includes a flattened state, a hovering state, and a folded state, for the convenience of description, it is considered that the angle between the first shell 1 and the second shell 2 is the first angle, and the angle between the second shell 2 and the third shell 3 is the second angle.

[0082] 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 first shell 1 and the second shell 2 can be between 175° and 185°, and the second angle between the second shell 2 and the third shell 3 can be between 175° and 185°. Specifically, the first angle between the first shell 1 and the second shell 2 is 180°, and the second angle between the second shell 2 and the third shell 3 is 180°.

[0083] 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 flattened. Figure 3 , Figure 3 A structural schematic diagram of a mobile terminal in a hovering state provided in an embodiment of the present application, in which a first angle between the first shell 1 and the second shell 2 can be between 45° and 175°, and a second angle between the second shell 2 and the third shell 3 can be between 45° and 175°.

[0084] Folded state: may also be referred to 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 may also be between 0° and 45°, and in addition, the second angle between the second shell 2 and the third shell 3 may also be between 0° and 45°.

[0085] Radiator: It is a device in the antenna used to receive / send electromagnetic wave radiation. In some cases, the "antenna" in a narrow sense is understood as a radiator, which converts the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy, which is used to radiate and receive radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, and is converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. The receiving radiator converts a certain polarized electromagnetic wave energy from a specific direction in space into modulated high-frequency current energy, which is transmitted to the receiver input via the feeder line.

[0086] Ground / floor: can refer to at least a part of any grounding layer, grounding plate, or grounding metal layer, etc. in a communication terminal (such as a mobile phone), or at least a part of any combination of any of the above grounding layers, grounding plates, or grounding components, etc., and "ground / floor" can be used for grounding components in the communication terminal. In one embodiment, "ground / floor" may include any one or more of the following: the grounding layer of the circuit board of the communication terminal, the grounding plate formed by the middle frame of the communication terminal, the grounding metal layer formed by the metal film under the screen, the conductive grounding layer of the battery, and the conductive parts 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 glass fiber, polymer, etc.

[0087] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material can be any of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. It will be appreciated by those skilled in the art that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0088] The shell of the mobile terminal includes a frame, and the frame is arranged around the outer circumference of the shell. Among them, the frame mainly including conductive materials can be called a conductive frame or a metal frame of the mobile terminal, which is suitable for industrial design (ID) of metal appearance. In one implementation, the outer surface of the frame is mainly conductive material, such as metal material, so as to form the appearance of a metal frame. In these implementations, the conductive part of the frame including the outer surface can be used as an antenna radiator of the mobile terminal, and is generally called a frame antenna.

[0089] In another implementation, the outer surface of the frame is mainly non-conductive material, such as plastic, forming the appearance of a non-metallic frame, which is suitable for non-metallic ID. In one implementation, the inner surface of the frame may include conductive material, such as metal material. In this implementation, the conductive part of the inner surface of the frame can be used as an antenna radiator of the mobile terminal. It should be understood that the radiator (or the conductive material on the inner surface) arranged on the inner surface of the frame can be arranged close to the non-conductive material of the frame to minimize the volume occupied by the radiator and be closer to the outside of the mobile terminal to achieve better signal transmission effect, and it can also be called a frame antenna. It should be noted that the antenna radiator is arranged close to the non-conductive material of the frame, which means that the antenna radiator can be arranged close to the inner surface of the non-conductive material, or it can be embedded in the non-conductive material, or it can be arranged close to the inner surface of the non-conductive material, for example, there can be a certain 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 regarded as part of the frame.

[0090] RF chip: It is a combination of all components of the antenna used for the reception and transmission of RF waves. In the case of a receiving antenna, the RF chip can be considered as the antenna part from the first amplifier to the front-end transmitter. In a transmitting antenna, the RF chip can be seen as the part after the last power amplifier. In some cases, the RF chip can also be understood as a feeding unit. The RF chip has the function of converting radio waves into electrical signals and sending them to the receiver component. Generally, it is considered to be a part of the antenna system that converts radio waves into electrical signals and vice versa. The antenna should be designed with maximum power transfer possibilities and efficiency in mind. To do this, the antenna feed impedance must be matched to the load resistor. The antenna feed impedance is a combination of resistance, capacitance, and inductance. In order to ensure maximum power transfer conditions, the two impedances (load resistance and feed impedance) should be matched. Matching can be done by considering frequency requirements and design parameters of the antenna such as gain, directivity, and radiation efficiency.

[0091] 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.

[0092] In some embodiments, the electronic device may further include a test socket (or referred to as a radio frequency socket or a radio frequency test socket). The test socket may be used to insert a coaxial cable to test the characteristics of the radio frequency front-end circuit or the radiator of the antenna through the cable. The radio frequency front-end circuit may be considered as a circuit portion coupled between the test socket and the transceiver.

[0093] 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.

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

[0095] It should also be understood that two feeding circuits in the first / second / ...Nth feeding circuits in the present application usually correspond to two radio frequency test sockets in the electronic device.

[0096] Feeder line: Also called transmission line, it refers to the connection line between the RF chip of the antenna 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 feeding 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, a glass antenna body, etc. 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).

[0097] Resonant frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range in which resonance occurs. The resonant frequency can be a frequency range in which the return loss characteristic is less than -6dB. The strongest point of resonance 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 this application produces a "first / second... resonance", where the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or 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 correspond to a fundamental mode resonance.

[0098] 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.

[0099] Communication frequency band / working frequency band: Regardless of the type of antenna, it always works within a certain frequency range (band width). For example, an antenna that supports the B40 frequency band has a working frequency band that includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the working frequency band of the antenna includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the working frequency band of the antenna. The width of the working frequency band is called the working bandwidth. The working bandwidth of an omnidirectional antenna may reach 3-5% of the center frequency. The working 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.

[0100] 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.

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

[0102] Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmit power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the greater the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the radiation efficiency of the antenna.

[0103] Antenna return loss can be expressed by the S11 parameter, which is one of the S parameters. S11 represents the reflection coefficient, which can characterize the quality of the antenna transmission efficiency.

[0104] 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 resonance shown in the S11 diagram in the portion 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 is, the smaller the antenna return loss is, and the smaller the energy reflected back by the antenna itself is, which means that more energy actually enters the antenna and the higher the radiation efficiency of the antenna is; the larger the S11 parameter is, the greater the antenna return loss is, and the lower the radiation efficiency of the antenna is.

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

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

[0107] Antenna radiation patterns usually have multiple radiation beams. The radiation beam with the strongest radiation intensity is called the main lobe, and the remaining radiation beams are called side lobes or side lobes. Among the side lobes, the side lobe in the opposite direction of the main lobe is also called the back lobe.

[0108] Radiation efficiency: refers to the ratio of the power radiated by the antenna into space (i.e. the power of the electromagnetic wave part that is effectively converted) to the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the loss power; the loss power mainly includes the return loss power and the ohmic loss power of the metal and / or the dielectric loss power. Metal loss and dielectric loss are both factors that affect radiation efficiency.

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

[0110] dB: decibel, a logarithmic concept with ten as the base. Decibel is only used to evaluate the proportional relationship between one physical quantity and another physical quantity, and it itself has no physical dimension. For every 10-fold increase in the ratio between two quantities, their difference can be expressed as 10 decibels. For example: A = "100", B = "10", C = "5", D = "1", then, A / D = 20dB; B / D = 10dB; C / D = 7dB; B / C = 3dB. In other words, a difference of 10 decibels between two quantities is a difference of 10 times, a difference of 20 decibels is a difference of 100 times, and so on. A difference of 3dB is a difference of 2 times between the two quantities.

[0111] End: The "end" in the first end / second end / third end / fourth end / ground end / open end of the main radiator cannot be narrowly understood as an endpoint or end physically disconnected from other radiators, but can also be considered as a section of the radiator including the first endpoint on the main radiator, and 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 first wavelength range of one eighth of the first endpoint, wherein the first wavelength can be a wavelength corresponding to the working frequency band of the main radiator, can be a wavelength corresponding to the center frequency of the working frequency band, or a wavelength corresponding to the resonance point. In one embodiment, the "end / point" may include a connection / coupling area on the radiator that is coupled to other conductive structures, for example, the feed end / feeding point may be a coupling area on the antenna radiator that is coupled to the feed structure (for example, an area facing a part of the feed structure), and for another example, the ground end / grounding point may be a connection / coupling area on the antenna radiator that is coupled to the ground structure.

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

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

[0114] 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.

[0115] 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.

[0116] In some embodiments, the "closed end" can also be understood from the perspective of current distribution. The closed end or the grounded end, etc., 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, the current distribution characteristics of larger current / small electric field can be maintained by coupling electronic devices (for example, inductive devices, etc.) through the closed end. In one embodiment, the current distribution characteristics of larger current / small electric field can be maintained by opening a gap at or near the closed end (for example, a gap filled with insulating material).

[0117] In some embodiments, the "open end" can also be understood from the perspective of current distribution. The open end or suspended end, etc., can be understood as a point with smaller current on the radiator, or as a point with larger 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 smaller current point / larger electric field point.

[0118] It should be understood that coupling electronic devices (for example, capacitors, inductors, etc.) at a radiator end at a gap (from the perspective of the structure of the radiator, 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.

[0119] Capacitance: It 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.

[0120] In the embodiments of the present application, the wavelength in a certain wavelength mode (such as a half wavelength mode, etc.) of the 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 the 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 the medium can be calculated as follows: Among them, ε is the relative dielectric constant of the medium, and frequency is the frequency of the radiation signal.

[0121] Coupling: In this application, it can be understood as indirect coupling, and "coupled connection" can be understood as indirect coupling connection. "Indirect coupling" can be understood as two conductors being electrically connected in an airless / non-contact manner. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, by coupling between the gaps between two conductive parts to form an equivalent capacitor to achieve signal transmission.

[0122] The limitations such as symmetry (for example, axisymmetry, or center symmetry, etc.), parallelism, perpendicularity, sameness (for example, same length, same width, etc.) mentioned in the embodiments of the present application are all for the current technological level, 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 may be less than or equal to a threshold of 1 mm, for example, the predetermined threshold may be 0.5 mm, or may be 0.1 mm. In one embodiment, the predetermined angle may be an angle within a range of ±10°, for example, the predetermined angle deviation is ±5°.

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

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

[0125] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0126] Figure 4 A schematic diagram of the structure of a mobile terminal in a flattened state provided in an embodiment of the present application. Figure 4 As shown, in the embodiment of the present application, the mobile terminal includes an antenna system in addition to the above-mentioned first housing 1, second housing 2, third housing 3, first rotating shaft mechanism 4 and second rotating shaft mechanism 5. The antenna system includes a satellite antenna, and the satellite antenna is used to receive / send electromagnetic waves. Specifically, the satellite antenna is used to receive electromagnetic waves from a communication satellite, or to send electromagnetic waves to a communication satellite. In this way, the satellite communication function of the mobile terminal can be realized through the transmission of electromagnetic waves between the satellite antenna and the communication satellite. In a specific embodiment, the mobile terminal can realize at least one of satellite text messaging, satellite phone calls or satellite Internet access through the satellite antenna.

[0127] When the satellite antenna is specifically arranged, the satellite antenna includes a first radiator 6, a second radiator 7 and a third radiator 8. In the present application, the first radiator 6, the second radiator 7 and the third radiator 8 can be arranged in different housings of the mobile terminal respectively.

[0128] In addition, along the axial direction of the mobile terminal, the first radiator 6, the second radiator 7 and the third radiator 8 may all be located at one end of the mobile terminal, which may be located at Figure 2 The A end of the mobile terminal shown in the figure, in this application, 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 satellite antenna to be aligned with the satellite. In a specific embodiment, as 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 .

[0129] In order to realize the communication function, the satellite antenna also includes a satellite radio frequency link, a first tuning circuit and a second tuning circuit, wherein the satellite radio frequency link is coupled to the third radiator 8 to realize the feeding of the satellite radio frequency link to the third radiator 8, so that the third radiator 8 can communicate with the communication satellite as the main radiator of the satellite antenna. 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 mentioning that the present application does not limit the specific setting positions of the satellite radio frequency link, the first tuning circuit and the second tuning circuit, which can be exemplarily set on the circuit board in the mobile terminal and accommodated in the installation space formed by the shell.

[0130] In this way, a resonant structure can be formed through the first tuning circuit and the first radiator, and another resonant structure can be formed through the second tuning circuit and the second radiator 7, so that the resonant mode of the resonance generated by the third radiator 8 can be affected by the two resonant structures, so as to achieve the purpose of adjusting the target 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 present application, when the satellite antenna is in working state, the first radiator 6 and the first tuning circuit, the second radiator 7 and the second tuning circuit, and the third radiator 8 can be used to jointly generate the target pattern of the satellite antenna, which is conducive to optimizing the satellite antenna pattern and / or improving the gain of the satellite antenna, thereby improving the communication performance of the satellite antenna.

[0131] 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, for example, affecting the maximum radiation direction of the target radiation pattern.

[0132] From the above introduction, it can be seen that for a foldable mobile terminal, the floor size is different when it is in different folding states, and different floor sizes have different effects on the directional pattern. In order to understand the optimization effect of the design scheme of the antenna system provided by the present application on the directional pattern of the satellite antenna, the communication performance of the satellite antenna of the mobile terminal in different folding states is analyzed below.

[0133] Figure 5a A schematic diagram of the distributed structure of the antenna system when the mobile terminal provided in the embodiment of the present application is in a flattened 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, the third radiator 8 is arranged on the second shell 2, the first radiator 6 is arranged on the first shell 1, and the second radiator 7 is arranged on the third shell 3. In this embodiment, 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 the 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 the second frequency. In addition, the third radiator 8 is fed by the satellite radio frequency link, so that the third radiator 8 can be used to generate a third resonance.

[0134] It is worth mentioning that in the present application, 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.

[0135] In addition, the frequency corresponding to the resonant structure refers to the frequency corresponding to the electrical length of the branch of the tuning circuit to which the radiator is connected. When the resonant structure is fed, the frequency of the resonance that can be generated by the resonant structure can be considered as the frequency corresponding to the resonant structure. It can be understood that the frequency corresponding to the resonant structure is related to the branch of the tuning circuit to which the radiator is connected.

[0136] Different branches of the first tuning circuit can be understood as 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.

[0137] Similarly, different branches of the second tuning circuit can be understood as 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, the second frequency corresponding to the second resonant structure can be adjusted by connecting the second radiator 7 to the corresponding branch of the second tuning circuit.

[0138] In one embodiment, Figure 5a In the scheme shown, the resonance point frequencies of the first frequency and the third resonance are both within the first communication frequency band of the satellite antenna. In this way, the current of the third radiator 8 can flow to the first radiator 6 and then go to the ground through the first radiator 6. Thus, the directional diagram of the satellite antenna is tilted toward the direction of the third shell 3.

[0139] 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 dashed dotted lines 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 relatively large, and the current on the floor (such as Figure 5a The arrows shown by the dotted lines in the middle flow in the direction of the frame and the floor in a traveling wave state to generate an orthogonal polarization radiation field. This enhances the circular polarization gain of the satellite antenna, which is beneficial to increase the beam width of the directional pattern to meet the satellite antenna's requirements for star alignment, thereby improving the communication performance of the satellite antenna.

[0140] It is understandable that in Figure 5a In the figure, the general shape and beam width of the satellite antenna's directional pattern are only schematically shown. In practical applications, as long as the beam width in the upper hemisphere of the satellite antenna's directional pattern meets the regulatory requirements (exemplarily greater than or equal to ±15°), the satellite antenna's alignment requirements can be met.

[0141] It is worth mentioning that the present application 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 in the present application 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 it satisfies the above relationship, so that the directional diagram 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 improved to improve the satellite communication performance of the mobile terminal.

[0142] In the present application, the satellite antenna further includes a first feeding point 9, and the satellite radio frequency link can be coupled and connected to the third radiator 8 through the first feeding point 9. Figure 5a In the flattened state shown in FIG. 1 , 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 is conducive to strengthening the directional pattern of the satellite antenna toward the direction of the third shell 3, thereby facilitating the improvement of the radiation efficiency of the satellite antenna.

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

[0144] In one embodiment, the frequency difference f23 between the second frequency f2 and the third resonance f3 satisfies: f23>10%*f3, and f23≥20%*f3 can be made illustratively. So that the second resonance structure can guide the current of the third resonance to the floor and the frame, so as to enhance the orthogonal polarization characteristics of the floor current and the current between the second radiator 7 and the third radiator 8, thereby facilitating the 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 resonance point frequency f3 of the third resonance satisfies: f23>100MHz, and f23≥300MHz can be made illustratively, for example, f23=350MHz, f23=500MHz, f23=600MHz, f23=700MHz or f23=1000MHz, etc.

[0145] It is worth mentioning that in the above Figure 5a In the embodiment shown, the first frequency corresponding to the first resonant structure is set within the first communication frequency band, so that the directional diagram of the satellite antenna is tilted toward the third shell 3. In another possible embodiment of the present application, when the mobile terminal is in a flattened state and the third radiator 8 is set on the second shell 2, if the satellite antenna is in working state, the resonant point frequency of the third resonance can also be set 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. The orthogonal polarization radiation field generated by the floor and frame radiators is used to enhance the circular polarization gain of the satellite antenna, thereby improving the communication performance of the satellite antenna.

[0146] In one embodiment, when the mobile terminal is in a flattened state and the third radiator 8 is disposed on the second housing 2, if the satellite antenna is in a working state, in a possible embodiment of the present application, 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, and exemplarily, f13≥20%*f3, so that the floor current and the current between the first radiator 6 and the third radiator 8 generate an orthogonal polarization radiation field through the coupling between the first radiator 6 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3, and exemplarily, f23≥20%*f3, so that the floor current and the current between the second radiator 7 and the third radiator 8 generate an orthogonal polarization radiation field through the coupling between the second radiator 7 and the third radiator 8, thereby facilitating the improvement of the circular polarization gain of the satellite antenna.

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

[0148] 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 to be arranged in the second housing 2. In actual application, the arrangement positions of the three radiators can be adjusted according to specific design requirements. For example, refer to Figure 5b , Figure 5b Another schematic diagram of the distributed structure of the antenna system when the mobile terminal provided in the embodiment of the present application is in a flattened state. Figure 5a The arrangement positions of the radiators in the mobile terminal shown are different. 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 .

[0149] exist Figure 5bIn the illustrated embodiment, when the satellite antenna is in operation, the first radiator 6 is coupled to the floor via a branch of a first tuning circuit to form a first resonant structure, the first resonant structure corresponds 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, the second resonant structure corresponds to a second frequency, and the third radiator 8 is used to generate a third resonance.

[0150] In one embodiment, the resonance 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. In this way, the first resonance structure formed by the first radiator 6 through the first tuning circuit and the second resonance structure formed by the second radiator 7 through the second tuning circuit can both have a greater impact on the resonance mode of the resonance generated by the third radiator 8, so as to achieve the purpose of adjusting the directional diagram of the satellite antenna and the circular polarization gain of the antenna, thereby being conducive to improving the radiation efficiency of the satellite antenna.

[0151] 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, and by way of example, f23≥20%*f3. So that the current between the first radiator 6 and the third radiator 8 and the floor current generate an orthogonal polarization 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 satisfies: f13>100MHz, and by way of example, f13≥300MHz, for example, f13=350MHz, f13=500MHz, f13=600MHz, f13=700MHz or f13=1000MHz, etc.

[0152] 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 can be made. So that the current between the second radiator 7 and the third radiator 8 and the floor current generate an orthogonal polarization 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>100MHz. For example, f23≥300MHz can be made, for example, f23=350MHz, f23=500MHz, f23=600MHz, f23=700MHz or f23=1000MHz, etc.

[0153] 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.

[0154] In one embodiment, 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, if the satellite antenna is in a working state, the resonance point frequencies of the first frequency and the third resonance can also be made within the first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band. In this way, the maximum radiation direction of the directional pattern of the satellite antenna can be adjusted while the circular polarization gain of the satellite antenna is improved.

[0155] In one embodiment, 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, if the satellite antenna is in a working state, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies: f13≤10%*f3, so as to curb the current of the third radiator 8 through the coupling between the first radiator 6 and the third radiator 8, thereby adjusting the maximum radiation direction of the directional diagram. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>10%*f3, and illustratively, f23≥20%*f3 can be made so that the floor current and the current between the second radiator 7 and the third radiator 8 generate an orthogonal polarization radiation field through the coupling between the second radiator 7 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna.

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

[0157] Figure 6a A schematic diagram of a distributed structure of an antenna system in a hovering state of a mobile terminal provided in an embodiment of the present application. 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.

[0158] It is worth mentioning that in the present application, 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 is 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: 45°≤α≤135°, for example, 60°≤α≤120° or 80°≤α≤100°. In practical applications, α=90°.

[0159] exist Figure 6a In the illustrated embodiment, the first radiator 6 is disposed on the first housing 1, the third radiator 8 is disposed on the second housing 2, and the second radiator 7 is disposed on the third housing 3. The first radiator 6 is coupled to the floor through another branch of the first tuning circuit to form a fourth resonant structure corresponding to a fourth frequency, the second radiator 7 is coupled to the floor through another branch of the second tuning circuit to form a fifth resonant structure corresponding to a fifth frequency, the third radiator 8 is used to generate a sixth resonance, the resonance 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.

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

[0161] It is worth mentioning that the present application 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 in the present application can adjust the fourth frequency, the fifth 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 hovering state, so that it satisfies the above relationship, so that the directional diagram 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 improved to improve the satellite communication performance of the mobile terminal.

[0162] In one embodiment of the present application, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance can satisfy: f46>10%*f6, and exemplary, f46≥20%*f6, so that the floor current and the current between the first radiator 6 and the third radiator 8 generate an orthogonal polarization radiation field through the coupling between the first radiator 6 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies: f46>100MHz, and exemplary, f46≥300MHz, for example, f46=350MHz, f46=500MHz, f46=600MHz, f46=700MHz or f46=1000MHz, etc.

[0163] In one embodiment of the present application, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f3. The coupling between the second radiator 7 and the third radiator 8 is used to curb the current of the third radiator 8, thereby adjusting the maximum radiation direction of the directivity diagram. In a specific embodiment, 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: 0≤f56≤100MHz, and exemplary, f56=50MHz, f56=65MHz or f56=90MHz, etc.

[0164] It is worth mentioning that when the mobile terminal is in Figure 6a In the hovering state shown, the resonant point frequency of the sixth resonance can also be made within the second communication frequency band of the satellite antenna, the fourth frequency is higher than the second communication frequency band, and the fifth frequency is higher than the second communication frequency band. Since the floor size of the mobile terminal is large, and the current of the satellite antenna can be vertically distributed on the floor, thereby realizing circular polarization, it is beneficial to improve the performance of the satellite antenna.

[0165] It is understandable that, in practical applications, the positions of the three radiators can be adjusted according to specific design requirements. Figure 6b As shown, Figure 6b Another schematic diagram of the distributed structure of the antenna system when the mobile terminal provided in the embodiment of the present application is in a hovering state. Figure 6a The arrangement positions of the radiators in the mobile terminal shown are different. Figure 6b In the embodiment, the first radiator 6 is arranged in the first shell 1, the second radiator 7 is arranged in the second shell 2, and the third radiator 8 is arranged 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, circular polarization is achieved, which is beneficial to the improvement of the performance of the satellite antenna.

[0166] In addition, when the mobile terminal is in Figure 6b In the state shown, in a possible embodiment, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance can also satisfy: f46>10%*f6, and illustratively, f46≥20%*f6, so that the floor current and the current between the first radiator 6 and the third radiator 8 can generate an orthogonal polarization radiation field through the coupling between the first radiator 6 and the third radiator 8, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f46 between the resonance point frequency f4 of the fourth resonance and the resonance point frequency f6 of the sixth resonance satisfies: f46>100MHz, and illustratively, f46≥300MHz, for example, f46=350MHz, f46=500MHz, f46=600MHz, f46=700MHz or f46=1000MHz, etc.

[0167] The frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f6, so as to curb the current of the third radiator 8 through the coupling between the second radiator 7 and the third radiator 8, thereby adjusting the maximum radiation direction of the directivity diagram. In a specific embodiment, the frequency difference f56 between the fifth frequency f5 and the sixth frequency f6 satisfies: 0≤f56≤100MHz, illustratively, f56=50MHz, f56=65MHz or f56=90MHz, etc.

[0168] 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.

[0169] It is worth mentioning that when the mobile terminal is in Figure 6b In the hovering state shown, when 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, if the satellite antenna is in working state, the resonance point frequencies of the first frequency, the second frequency and the third resonance can also be within the first communication frequency band of the satellite antenna. In this way, the current of the satellite antenna can still be vertically distributed on the floor, thereby realizing circular polarization, which is beneficial to the improvement of the performance of the satellite antenna, and at the same time, the maximum radiation direction of the directional pattern can be adjusted.

[0170] In one embodiment of the present application, when the mobile terminal is in Figure 6bIn the hovering state shown, when 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, if the satellite antenna is in working state, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance can also satisfy: f46≤10%*f6. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f6. In this way, the maximum radiation direction of the directional pattern can still be adjusted while realizing circular polarization and improving the performance of the satellite antenna.

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

[0172] It is worth mentioning that in Figure 6a and Figure 6b In the illustrated embodiment, the third shell 3 is folded along the side of the second support surface 201 away from the flexible display screen, so that the flexible display screen can be used for display on the first support surface 101 and the second support surface 201, and the display surface is larger, which can provide users with a better user experience.

[0173] In some other possible embodiments of the present application, 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.

[0174] 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 resonance 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 set with a second resonant structure, a third resonant structure, etc., wherein the frequency corresponding to any resonant structure of 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 of 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 resonance point frequency of the third radiator 8 is ≤10%, so as to improve the radiation pattern of the satellite antenna.

[0175] When the mobile terminal is in a hovering state, the third radiator 8 is arranged on a shell body that is in an intersecting relationship (for example, in an L-shape), and the frequency corresponding to the resonant structure on the other intersecting shell body 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 shell bodies on the multi-fold shell body 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.

[0176] Figure 7a A schematic diagram of a distributed structure of an antenna system of a mobile terminal in a folded state provided in an embodiment of the present application. 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.

[0177] exist Figure 7aIn the illustrated embodiment, the third radiator 8 is disposed on the second shell 2, the first radiator 6 is disposed on the first shell 1, and the second radiator 7 is disposed on the third shell 3. If the satellite antenna is in operation, the first radiator 6 is coupled to the floor through another branch of the first tuning circuit to form a seventh resonance structure, the seventh resonance structure corresponds to the seventh frequency, the second radiator 7 is coupled to the floor through another branch of the second tuning circuit to form an eighth resonance structure, the eighth resonance structure corresponds to the eighth frequency, the third radiator 8 is used to generate a ninth resonance, 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.

[0178] It is worth mentioning that the present application does not limit the third communication frequency band of the satellite antenna, which can be exemplified by the mobile terminal in Figure 7a In the folded state shown, the satellite antenna is in the receiving state of the working frequency band; or it can also 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 in this application 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 improved to improve the satellite communication performance of the mobile terminal.

[0179] 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 be used as a parasitic radiator of the third radiator 8. Figure 7b As shown, the current distribution of the second radiator 7 is similar to the current distribution 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 that the satellite antenna also has some characteristics of a traveling wave antenna.

[0180] In addition, when the mobile terminal is in Figure 7aIn the state shown, in a possible embodiment, the frequency difference f79 between the seventh frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies: f79>10%*f9. For example, f79≥10%*f9 can be made so that the floor current and the current between the first radiator 6 and the third radiator 8 generate an orthogonal polarization radiation field through the coupling between the first radiator 6 and the third radiator 8, which is beneficial to improve the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f79 between the seventh harmonic frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies: f79>100MHz. For example, f79≥300MHz, for example, f79=350MHz, f79=500MHz, f79=600MHz, f79=700MHz or f79=1000MHz, etc.

[0181] The frequency difference f89 between the eighth frequency f8 and the ninth frequency f9 satisfies: f89>10%*f9. For example, f89≥10%*f9 can be made so that the floor current and the current between the second radiator 7 and the third radiator 8 generate an orthogonal polarization radiation field through the coupling between the second radiator 7 and the third radiator 8, which is beneficial to improve the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f89 between the resonance point frequency f8 of the eighth resonance and the resonance point frequency f9 of the ninth resonance satisfies: f89>100MHz. For example, f89≥300MHz can be made, for example, f89=350MHz, f89=500MHz, f89=600MHz, f89=700MHz or f89=1000MHz, etc.

[0182] Figure 7c Another schematic diagram of the distributed structure of the antenna system of the mobile terminal in the folded state provided in the embodiment of the present application. Figure 7a The arrangement positions of the radiators in the mobile terminal shown are different. Figure 7b In the figure, the first radiator 6 is arranged in the first shell 1, the second radiator 7 is arranged in the second shell 2, and the third radiator 8 is arranged in the third shell 3. If the satellite antenna is in working state, the resonance point frequency of the ninth resonance generated by the third radiator 8 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. The antenna system of the mobile terminal adopts such a design method, and the decrease in the radiation efficiency of the satellite antenna caused by the folding of the third shell 3 can still be reduced 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.

[0183] In the above embodiments of the present application, 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 resonance 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.

[0184] Based on this, in a possible embodiment of the present application, the mobile terminal has at least two folding states, such as the flattened state, the hovering state and the folding state mentioned above. For any two folding states, when the satellite antenna is in the working state, the first radiator 6 can be connected to different branches of the first tuning circuit, and the second radiator 7 can be connected to different branches of the second tuning circuit. Exemplarily, 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 folding 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. In this way, the frequencies corresponding to the two resonant structures can meet the use requirements of the mobile terminal in different folding states, so that the two resonant structures can affect the resonant mode of the resonance generated by the third radiator 8, so as to optimize the directional diagram of the satellite antenna, thereby achieving the purpose of improving the communication performance of the satellite antenna.

[0185] 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.

[0186] In another possible embodiment of the present application, when the mobile terminal is in different folding states, the first radiator 6 can also be connected to the same branch of the first tuning circuit. Exemplarily, the first radiator 6 can be connected to a branch for making the resonance point frequency f of the first radiator 6 satisfy: 2500MHz≤f≤2700MHz, so that when the mobile terminal is in various folding states, the first radiator 6 can work in the above fixed working frequency band. In this way, the satellite communication requirements of the mobile terminal in different folding states can be met, and the antenna system can be simplified.

[0187] 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 application, when the satellite antenna is in the transmitting state, the first radiator 6 can be connected to the first branch of the first tuning circuit. When the satellite antenna is in the receiving state, the first radiator 6 can be connected to the second branch of the first tuning circuit. 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 branches of the first tuning circuit, respectively, so as to meet the communication requirements of the satellite antenna while also helping to improve the intelligence of the antenna system.

[0188] In another possible embodiment of the present application, when the satellite antenna is in the transmitting state or the receiving state, the first radiator 6 can also be connected to the same branch of the first tuning circuit. That is to say, whether the satellite antenna is in the transmitting state or the receiving state, the first resonant structure corresponds to the same frequency, for example, the first resonant structure corresponds to the frequency in the 2500MHz to 2700MHz frequency band. In this way, the satellite communication requirements of the mobile terminal can be met while also being conducive to simplifying the antenna system.

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

[0190] In a possible embodiment of the present application, when the satellite antenna is in a non-operating state, the first radiator 6 is coupled to the first antenna RF 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. In practical applications, the first antenna RF link can be a cellular RF link, and when the satellite antenna is in a non-operating state, the first radiator 6 is used as a radiator of the cellular antenna for cellular communication.

[0191] It is worth mentioning that, when the satellite antenna is in working state, the first radiator 6 and the first tuning circuit can form a resonant structure to affect the directional pattern of the satellite antenna. In a possible embodiment, the frequency corresponding to the first resonant structure when the satellite antenna is in working state 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-working state, so that the reuse of cellular antennas can be realized to achieve the purpose of simplifying the antenna system.

[0192] In practical applications, since the working state of the cellular antenna includes the B41 state, when the satellite antenna is in a non-working state, the first radiator 6 can also be connected to a branch of the first tuning circuit to adjust the resonance point frequency of the first resonance that can be generated by the first radiator 6 to the frequency band corresponding to the B41 state through the branch of the first tuning circuit. When the satellite antenna is in a working state, the first radiator 6 can still be connected to the branch of the first tuning circuit to make the frequency corresponding to the first resonance structure fall within the frequency band corresponding to the B41 state.

[0193] It is understandable that the first radiator 6 can also be used for other antennas and can generate a target resonance corresponding to the target frequency of other antennas. When the first radiator 6 is used as the first resonant structure, the target resonance only needs to meet the description of the first resonant structure in the above embodiment of the present application.

[0194] In addition, in the present application, when the mobile terminal is in a closed state and the satellite antenna is not working, 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 is 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 working, the second radiator 7 and the third radiator 8 can both be used as parasitic radiators of the first radiator 6, thereby improving the cellular communication performance of the antenna system.

[0195] It is understandable that in the present application, the mobile terminal can also control the state of the first tuning circuit through the cellular radio frequency link, so that the first radiator 6 produces corresponding resonance. In addition, the mobile terminal can control the state of the second tuning circuit through the cellular radio frequency link or the satellite link, so that the second radiator 7 produces corresponding resonance.

[0196] As described above, different branches of the first tuning circuit can be understood as different conduction states of the first tuning circuit, and each conduction state can be considered as a branch of the first tuning circuit. In the present application, a switch component can be used to implement the switching of different branches of the first tuning circuit. Similarly, the switching components can also be used to implement the switching between different branches of the second tuning circuit. When designing specifically, please refer to Figure 8 , Figure 8 Another structural schematic diagram of the antenna system when the mobile terminal provided in the embodiment of the present application is in a flattened state. In this embodiment, the first radiator 6 is arranged on the first housing 1, the third radiator 8 is arranged on the second housing 2, and the second radiator 7 is arranged on the third housing 3. In addition, the first tuning circuit further includes a first switch component 10, and the second tuning circuit further includes a second switch component 11. Among them, the first switch component includes a first switch device SW1 and a second switch device SW2, and the second switch component includes a third switch device SW3 and a fourth switch device SW4.

[0197] In addition, since the resonance point frequency of the resonance generated by 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, and the third switch component 12 is coupled to the third radiator 8. Figure 8 As shown, the third switch assembly 12 includes a fifth switch device SW5 and a sixth switch device SW6.

[0198] In the embodiment of the present application, the mobile terminal can, but is not limited to, control the conduction and disconnection of the third switch component 12 through the cellular radio frequency link. In addition, when the third switch component 12 is in the conduction state, the satellite radio frequency link can control the conduction state of the third switch component 12 through the first feeding point to achieve the switching of the receiving state and the transmitting state of the satellite antenna. Exemplarily, when the third switch component 12 is in the first conduction state, the satellite antenna is in the receiving state; and when the third switch component 12 is in the second conduction state, the satellite antenna is in the transmitting state.

[0199] It is understandable that, in practical applications, each radiator can be connected to a different circuit branch by adjusting the switch state of the switch device in each switch component, so that each radiator generates corresponding resonance.

[0200] It is worth mentioning that Figure 8 As shown, in this embodiment of the present application, the switch device with the inductor connected in parallel with the floor in each switch assembly can be used to increase the resonant point frequency of the radiator, while the switch device with the cross-slot capacitor can be used to lower the resonant frequency of the radiator. In other embodiments of the present application, each switch assembly can also adopt other possible design forms to achieve the function of correspondingly adjusting the resonant frequency of the radiator, which will not be listed one by one here, but they should all be understood to fall within the protection scope of the present application.

[0201] 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 width of the beam width of the radiation pattern.

[0202] In a specific embodiment, Figure 8In the flattened state shown, when the first switch device SW1 is in the first state, the second switch device SW2 is in the first state, the third switch device SW3 is in the first state, the fourth switch device SW4 is in the first state, the fifth switch device SW5 is in the first state, and the sixth switch device SW6 is in the first state, the satellite antenna is in the transmitting state. At this time, the resonance point frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the transmitting state, and the frequency corresponding to the first resonant structure is modulated to the working frequency band of 2500MHz to 2700MHz through the first switch component 10, and the frequency corresponding to the second resonant structure is modulated to a position higher than the above communication frequency band through the second switch component 11.

[0203] Fig. 9 Provided for the embodiments of this application Figure 8 The schematic diagram of the directional pattern of the satellite antenna of the mobile terminal shown is in the transmitting state. Fig. 9 It can be seen that by adopting the design of the antenna system provided in the present application, the beam angle α of the satellite antenna pattern of the mobile terminal can reach more than 15°, that is, the beam width of the pattern can reach more than ±15°, for example, it can reach ±20°, or even ±30°, which can meet the satellite communication requirements of the mobile terminal in the flattened state.

[0204] You can continue to refer to Figure 8 , when the first switch device SW1 is in the second state, the second switch device SW2 is in the second state, the third switch device SW3 is in the second state, the fourth switch device SW4 is in the second state, the fifth switch device SW5 is in the second state, and the sixth switch device SW6 is in the second state, the satellite antenna is in the receiving state. At this time, the resonance point frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the receiving state, and the frequency corresponding to the first resonant structure is modulated to the working frequency band of 2500MHz to 2700MHz through the first switch component 10, and the frequency corresponding to the second resonant structure is modulated to a position higher than the above communication frequency band through the second switch component 11.

[0205] 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.

[0206] In addition, when the mobile terminal is in Figure 6aThe satellite antenna is in the emitting state. In the hovering state shown, the first radiator 6 is arranged on the first shell 1, the third radiator 8 is arranged on the second shell 2, and the second radiator 7 is arranged on the third shell 3. When the first switch device SW1 is in the third state, the second switch device SW2 is in the third state, the third switch device SW3 is in the third state, the fourth switch device SW4 is in the third state, the fifth switch device SW5 is in the third state, and the sixth switch device SW6 is in the third state, the satellite antenna is in the transmitting state. At this time, the resonance 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 the working 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 communication frequency band by the second switch component 11.

[0207] Fig.10 Provided in the embodiments of this application Figure 6a Schematic diagram of the directional pattern of the satellite antenna of the mobile terminal when it is in the transmitting state. Fig.10 It can be seen that by adopting the design of the antenna system provided in the present application, when the mobile terminal is in a hovering state, the beam angle α of the satellite antenna's radiation pattern can also reach more than 15°, that is, the beam width of the radiation 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.

[0208] In addition, when the first switch device SW1 is in the fourth state, the second switch device SW2 is in the fourth state, the third switch device SW3 is in the fourth state, the fourth switch device SW4 is in the fourth state, the fifth switch device SW5 is in the fourth state, and the sixth switch device SW6 is in the fourth state, the satellite antenna is in the receiving state. At this time, the resonance point frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the receiving state, and the frequency corresponding to the first resonant structure is modulated to the working frequency band of 2500MHz to 2700MHz through the first switch component 10, and the frequency corresponding to the second resonant structure is modulated to the above communication frequency band through the second switch component 11.

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

[0210] For example, when the mobile terminal is in Figure 7aThe satellite antenna is in the folded state shown, and the first radiator 6 is arranged in the first shell 1, the third radiator 8 is arranged in the second shell 2, and the second radiator 7 is arranged in the third shell 3. When the first switch device SW1 is in the fifth state, the second switch device SW2 is in the fifth state, the third switch device SW3 is in the fifth state, the fourth switch device SW4 is in the fifth state, the fifth switch device SW5 is in the fifth state, and the sixth switch device SW6 is in the fifth state, the satellite antenna is in the transmitting state. At this time, the resonance point frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the transmitting state, and the frequency corresponding to the first resonant structure is modulated to the working frequency band of 2500MHz to 2700MHz through the first switch component 10, and the frequency corresponding to the second resonant structure is modulated to the above communication frequency band through the second switch component 11.

[0211] Fig.11 Provided for the embodiments of this application Figure 7a Schematic diagram of the directional pattern of the satellite antenna of the mobile terminal when it is in the transmitting state. Fig.11 It can be seen that by adopting the design of the antenna system provided in the present application, 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.

[0212] In addition, when the first switch device SW1 is in the sixth state, the second switch device SW2 is in the sixth state, the third switch device SW3 is in the sixth state, the fourth switch device SW4 is in the sixth state, the fifth switch device SW5 is in the sixth state, and the sixth switch device SW6 is in the sixth state, the satellite antenna is in the receiving state. At this time, the resonance point frequency generated by the third radiator 8 is within a communication frequency band when the satellite antenna is in the receiving state, and the frequency corresponding to the first resonant structure is modulated to the working frequency band of 2500MHz to 2700MHz through the first switch component 10, and the frequency corresponding to the second resonant structure is modulated to the above communication frequency band through the second switch component 11.

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

[0214] In summary, the antenna system of the mobile terminal provided in the embodiment of the present application 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.

[0215] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope 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 rotating shaft mechanism (4; 5) and an antenna system, wherein the first shell (1), the second shell (2) and the third shell (3) are connected via the rotating shaft mechanism (4; 5) Rotational connection, wherein: The antenna system comprises a satellite antenna, the satellite antenna comprises 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, characterized in that: 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 resonance 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, characterized in that: 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, characterized in that: A frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies: 0≤f13≤100MHz; a frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>100MHz.

5. The mobile terminal according to claim 1, characterized in that: 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 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.

6. The mobile terminal according to claim 5, characterized in that: 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 6, characterized in that: 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.

8. The mobile terminal according to claim 1, characterized in that: 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.

9. The mobile terminal according to claim 8, characterized in that: 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.

10. The mobile terminal according to claim 9, characterized in that: A frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies: f13>100 MHz, and a frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies: f23>100 MHz.

11. The mobile terminal according to claim 1, characterized in that: 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 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.

12. The mobile terminal according to claim 1, characterized in that: 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.

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

14. The mobile terminal according to any one of claims 1 to 13, characterized in that: 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 (1) and the second supporting surface (2) are coplanar, the third supporting surface (3) intersects with the second supporting surface (2), 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 resonance 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 13, characterized in that: 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 (1) and the second supporting surface (2) are coplanar, the third supporting surface (3) intersects with the second supporting surface (2), and the third radiator (8) is arranged on the second shell (2), the satellite antenna is in 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, 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 resonance point frequency f6 of the sixth resonance satisfies: f46>10%*f6, and a frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f3.

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

17. The mobile terminal according to any one of claims 1 to 13, characterized in that: 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 (1) and the second supporting surface (2) are coplanar, the third supporting surface (3) intersects with the second supporting surface (2), 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 the resonance 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.

18. The mobile terminal according to any one of claims 1 to 13, characterized in that: 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 (1) and the second supporting surface (2) are coplanar, the third supporting surface (3) intersects with the second supporting surface (2), 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 resonance point frequency f6 of the sixth resonance satisfies: f46>10%*f6, and a frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f6.

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

20. The mobile terminal according to any one of claims 1 to 13, characterized in that: 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 (1) and the second supporting surface (2) are coplanar, the third supporting surface (3) intersects with the second supporting surface (2), 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 the resonance point frequencies of the fourth frequency, the fifth frequency and the sixth resonance are all within the second communication frequency band of the satellite antenna.

21. The mobile terminal according to any one of claims 1 to 13, characterized in that: 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 (1) and the second supporting surface (2) are coplanar, the third supporting surface (3) intersects with the second supporting surface (2), 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 resonance point frequency f6 of the sixth resonance satisfies: f46≤10%*f6, and a frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies: f56≤10%*f6.

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

23. The mobile terminal according to any one of claims 14 to 22, characterized in that: An included angle α between the third supporting surface and the second supporting surface satisfies: 45°≤α≤135°.

24. The mobile terminal according to any one of claims 1 to 23, characterized in that: 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 resonance structure, the seventh resonance 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 resonance structure, the eighth resonance 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.

25. The mobile terminal according to any one of claims 1 to 23, characterized in that: 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 resonance structure, the seventh resonance 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 resonance structure, the eighth resonance 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 a resonance point frequency f9 of the ninth resonance satisfies: f79>10%*f9, and a frequency difference f89 between the eighth frequency f8 and a resonance point frequency f9 of the ninth resonance satisfies: f89>10%*f9.

26. The mobile terminal according to claim 25, characterized in that: 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.

27. The mobile terminal according to any one of claims 1 to 26, characterized in that: The satellite antenna also includes a first feeding point (9), and the satellite radio frequency link is coupled to the third radiator (8) via 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) between the first shell (1) and the second shell (2) is greater than the distance between the first feeding point (9) and the axis of the second rotating shaft mechanism (5) between the second shell (2) and the third shell (3).

28. The mobile terminal according to any one of claims 1 to 27, characterized in that: 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 conducting state, the satellite antenna is in a transmitting state; when the third switch component (12) is in a second conducting state, the satellite antenna is in a receiving state.

29. The mobile terminal according to claim 28, characterized in that: 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.

30. The mobile terminal according to claim 29, characterized in that: 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.

31. The mobile terminal according to any one of claims 1 to 30, characterized in that: 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.

32. The mobile terminal according to any one of claims 1 to 30, characterized in that: 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.

33. The mobile terminal according to any one of claims 1 to 32, characterized in that: When the satellite antenna is in a non-operating 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.

34. The mobile terminal according to claim 33, characterized in that: The resonance point frequency f of the first radiator satisfies: 2500MHz≤f≤2700MHz.

35. The mobile terminal according to claim 34, characterized in that: The mobile terminal controls the state of the first tuning circuit via a cellular radio frequency link.

36. The mobile terminal according to any one of claims 1 to 35, characterized in that: 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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