Mobile terminal

Abstract

A mobile terminal provided by the present application comprises an antenna. The antenna comprises a signal source, a switching circuit, a first radiator, and a second radiator. The first radiator is an L-shaped radiator, a part of the first radiator is located on a top frame, and another part of the first radiator is located on a second side frame. The second radiator is located on a first side frame or the second side frame. The signal source is used for providing a radio frequency transmission signal of a satellite communication frequency band. The first radiator comprises a first feed point, and the second radiator comprises a second feed point. The switching circuit is connected between the signal source and the first feed point and the second feed point. When the mobile terminal is in a left head-to-hand satellite communication state, the switching circuit switches the first feed point to be electrically connected to the signal source. When the mobile terminal is in a right head-to-hand satellite communication state, the switching circuit switches the second feed point to be electrically connected to the signal source. The mobile terminal can implement head-to-hand satellite communication with high efficiency, and can better meet the requirements of satellite communication.

Description

Mobile terminal

[0001] Cross-reference to related applications

[0002] This application claims priority to the Chinese Patent Application No. 202410828856.1, filed on June 24, 2024, and entitled “A terminal device”, to the Chinese Patent Application No. 202411402679.7, filed on September 30, 2024, and entitled “Mobile terminal”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of mobile terminals, and in particular to a mobile terminal. BACKGROUND

[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 mobile terminals using communication satellites for communication, people's actual use of mobile terminals for communication satellite communication is becoming more and more demanding.

[0005] Due to the characteristics of fewer numbers and longer distances of communication satellites compared to currently commonly used base stations, the power of the radio frequency signals of the communication satellites to the ground is relatively small. Therefore, in order to improve the communication satellite communication performance of the mobile terminal, it is necessary to enable the satellite antenna carried by the mobile terminal to have strong capabilities.

[0006] The signal beam of the satellite antenna has a certain directivity, and only within a certain beam angle does it have sufficient signal strength to perform communication satellite communication. The mobile terminal in the prior art includes a satellite antenna, and when performing communication satellite communication, attention needs to be paid to the satellite, i.e. the pose of the mobile terminal needs to be adjusted, and only when the mobile terminal is kept in a certain pose state can it have good communication effect. At present, the mobile terminal needs to perform satellite communication in a handheld state and cannot be used against the ear. SUMMARY

[0007] The mobile terminal provided by the present application includes an antenna. The mobile terminal can realize head-hand satellite communication, has high head-hand efficiency, and can better meet the requirements of satellite communication.

[0008] In a first aspect, the present application provides a mobile terminal. The mobile terminal comprises a display screen, a back cover, a frame and an antenna, and the display screen and the back cover are fixed to two sides of the frame respectively. The frame comprises a top frame, a first side frame and a second side frame, the top frame is located at the top of the mobile terminal, and the first side frame and the second side frame are located at two sides of the top frame. Specifically, the first side frame, the top frame and the second side frame are arranged in a clockwise direction from left to right on the side of the back cover. The antenna comprises a signal source, a switch switching circuit, a first radiator and a second radiator. The first radiator is an L-shaped radiator, and a part of the first radiator is located on the top frame and the other part is located on the second side frame. The first radiator is located at the upper right corner of the frame when viewed from the side of the back cover. The second radiator is located on the first side frame or the second side frame; the signal source is used to provide a radio frequency transmission signal of a satellite communication frequency band, and is used to realize satellite communication of the antenna. Specifically, the first radiator comprises a first feeding point, the second radiator comprises a second feeding point, the signal source feeds the first radiator through the first feeding point and feeds the second radiator through the second feeding point. The switch switching circuit is connected between the signal source and the first feeding point and the second feeding point; when the mobile terminal is in a left-hand satellite communication state, the switch switching circuit is used to electrically connect the first feeding point and the signal source. When the mobile terminal is in a right-hand satellite communication state, the switch switching circuit is used to electrically connect the second feeding point and the signal source.

[0009] In this scheme, when the mobile terminal is in a left-hand satellite communication state, the switch switching circuit switches the first feeding point and the signal source to be electrically connected, that is, the first radiator is used for left-hand satellite communication. The left-hand satellite communication refers to that the user holds the mobile terminal with the left hand and pastes the mobile terminal to the left side of the head, and listens to the sound with the left ear, so as to communicate with the communication satellite. When the mobile terminal is in a right-hand satellite communication state, the switch switching circuit switches the second feeding point and the signal source to be electrically connected, that is, the second radiator is used for right-hand satellite communication. The right-hand satellite communication refers to that the user holds the mobile terminal with the right hand and pastes the mobile terminal to the right side of the head, and listens to the sound with the right ear, so as to communicate with the communication satellite. The mobile terminal in the embodiment of the present application can realize left-hand satellite communication and right-hand satellite communication when communicating with the satellite, and can switch the working radiator by using the switch switching circuit. When the user communicates with the satellite with the left hand, the first radiator communicates with the satellite; when the user communicates with the satellite with the right hand, the second radiator communicates with the satellite. The application scenario of the mobile terminal in the present application is relatively rich.

[0010] The mobile terminal is in a left-hand satellite communication state, and the radiation beam of the first radiator has a gain point with an antenna gain greater than or equal to -8dbic in a range of 25° to 65° in an elevation angle. The elevation angle can be an angle between the beam and the vertical direction. In the scheme, the antenna gain of the first radiator is greater than or equal to -8dbic, and thus the mobile terminal can better communicate with the satellite, so that the mobile terminal realizes left-hand satellite communication.

[0011] The mobile terminal is in a right-hand satellite communication state, and the radiation beam of the second radiator has a gain point with an antenna gain greater than or equal to -8dbic in a range of 25° to 65° in an elevation angle. In the scheme, the antenna gain of the second radiator is greater than or equal to -8dbic, and thus the mobile terminal can better communicate with the satellite, so that the mobile terminal realizes right-hand satellite communication.

[0012] In the present application, a first current is formed on the first radiator, and the first current flows in the same direction on the first radiator, so that a better upper hemisphere radiation pattern can be obtained, which is beneficial to realize satellite communication. Specifically, the first current can flow from the second side frame to the top frame, or the first current can flow from the top frame to the second side frame.

[0013] A second current is formed on the second radiator, and the second current flows in the same direction on the second radiator, so that a better upper hemisphere radiation pattern can be obtained, which is beneficial to realize satellite communication. In a specific technical scheme, the second current flows towards the top frame. Alternatively, in a technical scheme, the second current can flow away from the top frame.

[0014] There are various choices for forming the structure of the first radiator, for example, the top frame includes a first slot, the second side frame includes a second slot, and the first radiator is a frame located between the first slot and the second slot.

[0015] In a specific technical scheme, the first radiator can be fed at one end close to the first slot or at one end close to the second slot. For example, the first feeding point is located at one end of the first radiator close to the first slot, and one end of the first radiator close to the second slot is a first open end. Alternatively, the first feeding point is located at one end of the first radiator close to the second slot, and one end of the first radiator close to the first slot is a first open end. In the scheme, the first radiator is a 1 / 2 wavelength antenna.

[0016] Further, the first radiator can further include a first grounding point between the first feeding point and the first open end. The first radiator has strong radiation capability.

[0017] The specific structure of the second radiator has multiple options. For example, in one option, the second radiator is located in the second side frame, the second side frame includes a third slot and a fourth slot arranged away from the top frame, the distance between the third slot and the top frame is less than the distance between the fourth slot and the top frame. The second radiator is located between the third slot and the fourth slot. In this option, the second radiator is a 1 / 2 wavelength antenna.

[0018] In one specific option, the second feeding point is located at one end of the second radiator close to the fourth slot, and the other end of the second radiator close to the third slot is the second open end.

[0019] In another specific option, the second feeding point is located at one end of the second radiator close to the third slot, and the other end of the second radiator close to the fourth slot is the second open end.

[0020] The second radiator can also include a second grounding point located between the second feeding point and the second open end. The middle ground of the second radiator is also conducive to improving the radiation efficiency of the antenna and improving the communication effect.

[0021] Alternatively, in one option, the second side frame includes a fourth slot, and the fourth slot has a second grounding point between the fourth slot and the top frame. The second radiator is located between the fourth slot and the second grounding point.

[0022] In a specific option, the second feeding point is located at one end of the second radiator close to the fourth slot. The second radiator is a 1 / 4 wavelength antenna.

[0023] In the above option, the distance L1 between one end of the second radiator close to the fourth slot and the top frame satisfies: 40mm≤L1≤80mm. This is conducive to reducing the influence of the head hand efficiency and improving the satellite communication effect of the second radiator.

[0024] The length L of the second radiator satisfies: 20mm≤L≤40mm. This makes the second radiator have better radiation efficiency and improves the satellite communication effect of the mobile terminal.

[0025] In one option, the second radiator can also be located in the first side frame. Specifically, the first side frame includes a third slot and a fourth slot arranged away from the top frame, and the second radiator is located between the third slot and the fourth slot. In this option, the second radiator is a 1 / 2 wavelength antenna.

[0026] In one specific implementation, the second feeding point is located at one end of the second radiator close to the third slot, and the other end of the second radiator close to the fourth slot is the second open end.

[0027] In one specific implementation, the second feeding point is located at one end of the second radiating body close to the fourth slot, and the other end of the second radiating body close to the third slot is a second open end.

[0028] The second radiating body can further include a second grounding point located between the second feeding point and the second open end. The second grounding point in the middle of the second radiating body is also conducive to improving the radiation efficiency of the antenna.

[0029] In one specific implementation, the first side frame includes a fourth slot, and the first side frame has a second grounding point between the fourth slot and the top frame. The second radiating body is located between the fourth slot and the second grounding point.

[0030] In one specific implementation, the second feeding point is located at one end of the second radiating body close to the fourth slot. The second radiating body is a 1 / 4 wavelength antenna.

[0031] The antenna can further include a third radiating body located at the top frame, and the third radiating body includes a third feeding point. The switch switching circuit is further connected between the signal source and the third feeding point. When the mobile terminal is in a handheld communication state, the switch switching circuit is used to electrically connect the signal source and at least one of the first feeding point, the second feeding point, and the third feeding point. That is, the switch switching circuit is connected between the signal source and the first feeding point, the second feeding point, and the third feeding point. It can also be understood that one side of the switch switching circuit is connected to the signal source, and the other side is connected to the first feeding point, the second feeding point, and the third feeding point, respectively. At least one of the first radiating body, the second radiating body, and the third radiating body can be selected to communicate with the satellite. In this application, when the mobile terminal is in a handheld state for satellite communication, the first radiating body can be selected to communicate with the satellite according to the actual working state, or the second radiating body can be selected to communicate with the satellite, or the third radiating body can be selected to communicate with the satellite, or any combination of the first radiating body, the second radiating body, and the third radiating body can be selected to communicate with the satellite to improve the communication effect of the mobile terminal in a handheld state, and also to reduce the difficulty of pointing to the satellite during satellite communication of the mobile terminal. In this application, in addition to being used to realize left-hand satellite communication of the user, the first radiating body can also be used to realize handheld communication of the user. In addition to being used to realize right-hand satellite communication of the user, the second radiating body can also be used to realize handheld communication of the user, to improve the effect of the handheld communication state and enrich the functions of the first radiating body and the second radiating body.

[0032] In addition, in one specific implementation, when the mobile terminal is in a handheld communication state, the switch switching circuit is used to electrically connect the signal source and the first feeding point and the second feeding point. That is, the first radiating body and the second radiating body are used together to realize handheld communication of the user, to enrich the communication functions of the mobile terminal.

[0033] In a second aspect, the application also provides a mobile terminal. The mobile terminal comprises a display screen, a back cover, a frame and an antenna. The display screen and the back cover are fixed to two sides of the frame respectively. The frame comprises a top frame, a first side frame and a second side frame. The top frame is located at the top of the mobile terminal, and the first side frame and the second side frame are located at two sides of the top frame. Specifically, the first side frame, the top frame and the second side frame are arranged in sequence in a clockwise direction on the side of the back cover. The antenna comprises a signal source and a first radiator. The first radiator is an L-shaped radiator. A part of the first radiator is located in the top frame, and another part of the first radiator is located in the second side frame. The first radiator is located at the upper right corner of the frame as viewed from the side of the back cover. The signal source is used to provide a radio frequency transmission signal of a satellite communication frequency band to realize satellite communication of the mobile terminal. The first radiator comprises a first feeding point. The signal source is electrically connected to the first feeding point to realize left-hand satellite communication of the mobile terminal. Specifically, the left-hand satellite communication has a high efficiency, and the antenna has a high radiation efficiency, which can better meet the requirements of satellite communication.

[0034] Specifically, the mobile terminal is in a left-hand satellite communication state. The radiation beam of the first radiator has a gain point with a gain greater than or equal to -8dbic in a range of 25° to 65° in an elevation angle. The elevation angle can be an angle between the beam and the vertical direction. Specifically, the elevation angle can be considered as an elevation angle in a human body coordinate system. In this scheme, the antenna gain of the first radiator is greater than or equal to -8dbic, which can better communicate with the satellite, so that the mobile terminal realizes left-hand satellite communication.

[0035] In this application, a first current is formed on the first radiator. The first current flows in the same direction on the first radiator, and a better upper hemisphere radiation pattern can be obtained. Specifically, the first current can flow from the second side frame to the top frame, or the first current can flow from the top frame to the second side frame.

[0036] The way of forming the structure of the first radiator has multiple choices. For example, the top frame comprises a first slot, the second side frame comprises a second slot, and the first radiator is a part of the frame located between the first slot and the second slot.

[0037] The first feeding point can be fed at one end of the first radiator close to the first slot, or at one end close to the second slot. For example, the first feeding point is located at one end of the first radiator close to the first slot, and the other end close to the second slot is a first open end. Alternatively, the first feeding point is located at one end of the first radiator close to the second slot, and the other end close to the first slot is a first open end. The first radiator in this scheme is a 1 / 2 wavelength antenna.

[0038] Further, the first radiator can further comprise a first grounding point located between the first feeding point and the first open end. This is conducive to improving the ability of the antenna to radiate signals.

[0039] In one technical solution, the antenna further comprises a switch switching circuit and a third radiator. The third radiator is located at the top frame, and the third radiator comprises a third feeding point. The switch switching circuit is connected between the signal source and the first feeding point and the third feeding point. When the mobile terminal is in a handheld communication state, the switch switching circuit is electrically connected to at least one of the signal source, the first feeding point and the third feeding point. The switch switching circuit can switch the signal source to be connected to the first feeding point or the third feeding point. Thus, the first radiator is in a working state for satellite communication, or the third radiator is in a working state for satellite communication. Alternatively, the switch switching circuit can be connected to the signal source, the first feeding point and the third feeding point, so that the first radiator and the third radiator are used for satellite communication. This solution can improve the effect of the handheld communication state and enrich the functions of the first radiator. This solution can also improve the communication effect of the handheld state of the mobile terminal, and is also conducive to reducing the difficulty of satellite alignment in the satellite communication process of the mobile terminal.

[0040] In a third aspect, the application further provides a mobile terminal. The mobile terminal comprises a display screen, a back cover, a frame and an antenna. The display screen and the back cover are fixed to the two sides of the frame, respectively. The frame comprises a top frame, a first side frame and a second side frame. The top frame is located at the top of the mobile terminal, and the first side frame and the second side frame are located at the two sides of the top frame. The frame comprises the top frame, the first side frame and the second side frame, and the top frame is located at the top of the mobile terminal. On the side of the back cover, the first side frame, the top frame and the second side frame are arranged in sequence in a clockwise direction. Specifically, on the side of the back cover, the first side frame, the top frame and the second side frame are arranged in sequence in a clockwise direction. The antenna comprises a signal source and a second radiator. The second radiator is located at the first side frame or the second side frame. In one technical solution, the signal source is used to provide a radio frequency transmission signal of a satellite communication frequency band to realize satellite communication of the mobile terminal. The second radiator comprises a second feeding point to realize satellite communication of the mobile terminal. When the mobile terminal is in a right-hand satellite communication state, the second feeding point is electrically connected to the signal source. When viewed from the side of the back cover, the second radiator is located at the left side or the right side of the frame. The second radiator can achieve good right-hand satellite communication. Specifically, the antenna has high efficiency, and the high antenna radiation efficiency can better meet the requirements of satellite communication.

[0041] In one technical solution, when the mobile terminal is in a right-hand satellite communication state, the radiation beam of the second radiator has a gain point with a gain greater than or equal to -8dbic in a range of 25° to 65° in the elevation angle. The elevation angle refers to the angle between the beam and the vertical direction. In this solution, the antenna gain of the second radiator is greater than or equal to -8dbic, which can better communicate with the satellite, so that the mobile terminal realizes right-hand satellite communication.

[0042] The second current formed on the second radiator flows in the same direction on the second radiator, and a better upper hemisphere radiation pattern can be obtained. In a specific technical solution, the second current flows towards the top frame. Alternatively, in a technical solution, the second current can also flow away from the top frame.

[0043] The specific structure of the second radiator has multiple options. For example, in a technical solution, the second radiator is located in the second side frame, the second side frame includes a third slot and a fourth slot arranged away from the top frame, and the distance between the third slot and the top frame is less than the distance between the fourth slot and the top frame. The second radiator is located between the third slot and the fourth slot. In this solution, the second radiator is a 1 / 2 wavelength antenna.

[0044] In a specific technical solution, the second feeding point is located at one end of the second radiator close to the fourth slot, and the other end of the second radiator close to the third slot is the second open end.

[0045] In another specific technical solution, the second feeding point is located at one end of the second radiator close to the third slot, and the other end of the second radiator close to the fourth slot is the second open end.

[0046] The second radiator can also include a second grounding point located between the second feeding point and the second open end. Grounding in the middle of the second radiator is also conducive to improving the radiation efficiency of the antenna and the satellite communication capability of the mobile terminal.

[0047] Alternatively, in a technical solution, the second side frame includes a fourth slot, and the second side frame also includes a second grounding point located between the fourth slot and the top frame. The second radiator is located between the fourth slot and the top frame.

[0048] In a technical solution, the second feeding point of the second radiator is located at one end of the second radiator close to the fourth slot. The second radiator is a 1 / 4 wavelength antenna.

[0049] In the above technical solution, the distance L1 between one end of the second radiator close to the fourth slot and the top frame satisfies: 40mm≤L1≤80mm. This is conducive to reducing the influence of the head hand efficiency and improving the satellite communication effect of the second radiator 05.

[0050] The length L of the second radiator satisfies: 20mm≤L≤40mm. This makes the second radiator have better radiation efficiency and improves the satellite communication effect of the mobile terminal.

[0051] In a technical solution, the second radiator can also be located in the first side frame. Specifically, the first side frame includes a third slot and a fourth slot arranged away from the top frame, and the second radiator is located between the third slot and the fourth slot. In this solution, the second radiator is a 1 / 2 wavelength antenna.

[0052] In one implementation, the second feed point is located at one end of the second radiating body close to the third slot, and the other end of the second radiating body close to the fourth slot is the second open end. In one implementation, the second feed point is located at one end of the second radiating body close to the fourth slot, and the other end of the second radiating body close to the third slot is the second open end.

[0053] The second radiating body can further include a second grounding point between the second feed point and the second open end. The middle grounding of the second radiating body is also conducive to improving the radiation efficiency of the antenna.

[0054] In one implementation, the first side frame includes a fourth slot, and the first side frame includes a second grounding point between the fourth slot and the top frame. The second radiating body is located between the fourth slot and the second grounding point, and the second feed point is located at one end of the second radiating body close to the fourth slot. The second radiating body is a 1 / 4 wavelength antenna.

[0055] In one implementation, the antenna further includes a switch switching circuit and a third radiating body. The third radiating body is located in the top frame, and the third radiating body includes a third feed point. The switch switching circuit is connected between the signal source and the second feed point and the third feed point. When the mobile terminal is in a handheld communication state, the switch switching circuit is electrically connected to at least one of the signal source, the second feed point and the third feed point. The switch switching circuit can switch the signal source to be electrically connected to the second feed point or the third feed point. Thus, the second radiating body is in a working state for satellite communication, or the third radiating body is in a working state for satellite communication. Alternatively, the switch switching circuit can connect the second feed point and the third feed point to the signal source, so that the second radiating body and the third radiating body are used to communicate with the satellite cooperatively. This implementation can improve the effect of the handheld communication state and enrich the function of the second radiating body. This implementation can also improve the communication effect of the mobile terminal in the handheld state, and is also conducive to reducing the difficulty of pointing to the satellite during satellite communication of the mobile terminal. BRIEF DESCRIPTION OF DRAWINGS

[0056] FIG. 1 is a schematic diagram of a structure of a mobile terminal in an embodiment of the present application;

[0057] FIG. 2 is a schematic diagram of a back side structure of a mobile terminal in an embodiment of the present application;

[0058] FIG. 3 is a schematic diagram of a back side structure of a mobile terminal in an embodiment of the present application;

[0059] FIG. 4 is a diagram of a first radiating body in a free space in an embodiment of the present application;

[0060] FIG. 5 is a schematic diagram of an axial ratio of a first radiating body in a free space in an embodiment of the present application;

[0061] Fig. 6 is a left-hand circular polarized pattern of the first radiator in free space in an embodiment of the present application;

[0062] Fig. 7 is a schematic diagram of the mobile terminal in a left-hand satellite communication state in an embodiment of the present application;

[0063] Fig. 8 is a pattern of the first radiator in a left-hand satellite communication state in an embodiment of the present application;

[0064] Fig. 9 is a schematic diagram of an axial ratio of the first radiator in a left-hand satellite communication state in an embodiment of the present application;

[0065] Fig. 10 is a left-hand circular polarized pattern of the first radiator in a left-hand satellite communication state in an embodiment of the present application;

[0066] Fig. 11 is a comparison diagram of radiation efficiency of the first radiator in free space and in a left-hand satellite communication state in an embodiment of the present application;

[0067] Fig. 12 is a schematic diagram of a back side structure of the mobile terminal in an embodiment of the present application;

[0068] Fig. 13 is a schematic diagram of a back side structure of the mobile terminal in an embodiment of the present application;

[0069] Fig. 14 is a current distribution diagram of the first radiator in an embodiment of the present application;

[0070] Fig. 15 is a schematic diagram of a simulation result of the mobile terminal in an embodiment of the present application;

[0071] Fig. 16 is a current distribution diagram of the first radiator in an embodiment of the present application;

[0072] Fig. 17 is a schematic diagram of a structure of the mobile terminal in an embodiment of the present application;

[0073] Fig. 18 is a schematic diagram of a back side structure of the mobile terminal in an embodiment of the present application;

[0074] Fig. 19 is a schematic diagram of a back side structure of the mobile terminal in an embodiment of the present application;

[0075] Fig. 20 is a schematic diagram of a back side structure of the mobile terminal in an embodiment of the present application;

[0076] Fig. 21 is a schematic diagram of the mobile terminal in a right-hand satellite communication state in an embodiment of the present application;

[0077] Fig. 22 is a pattern of the second radiator in a right-hand satellite communication state in an embodiment of the present application;

[0078] Fig. 23 is a schematic diagram of an axial ratio of the second radiator in a right-hand satellite communication state in an embodiment of the present application;

[0079] Figure 24 is a left-hand circular polarization pattern of the second radiator in the right-hand satellite communication state in an embodiment of this application;

[0080] Figure 25 is a comparison of the radiation efficiency of the second radiator in free space and in a right-hand satellite communication state in an embodiment of this application.

[0081] Figure 26 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0082] Figure 27 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0083] Figure 28 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0084] Figure 29 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0085] Figure 30 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0086] Figure 31 is a comparison of the radiation efficiency of the second radiator in free space and in a right-hand satellite communication state in an embodiment of this application.

[0087] Figure 32 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0088] Figure 33 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0089] Figure 34 is a schematic diagram of a mobile terminal in a right-hand satellite communication state in an embodiment of this application;

[0090] Figure 35 is a radiation pattern of the second radiator in a right-hand satellite communication state in an embodiment of this application;

[0091] Figure 36 is a schematic diagram of the axis ratio of the second radiator in the right-hand satellite communication state in an embodiment of this application;

[0092] Figure 37 is a left-hand circular polarization pattern of the second radiator in the right-hand satellite communication state in an embodiment of this application;

[0093] Figure 38 is a comparison of the radiation efficiency of the second radiator in free space and in a right-hand satellite communication state in an embodiment of this application.

[0094] Figure 39 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0095] Figure 40 is a schematic diagram of a rear-side structure of a mobile terminal in an embodiment of this application;

[0096] FIG. 41 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application;

[0097] FIG. 42 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application;

[0098] FIG. 43 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application;

[0099] FIG. 44 is a comparison diagram of radiation efficiency of a second radiator in free space and in a right-hand satellite communication state according to an embodiment of the present application;

[0100] FIG. 45 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application;

[0101] FIG. 46 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application;

[0102] FIG. 47 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application.

[0103] Reference numerals: 10 - mobile terminal; 11 - frame; 111 - top frame; 112 - first side frame; 1121 - first slit; 113 - second side frame; 1131 - second slit; 1132 - third slit; 1133 - fourth slit; 13 - cover plate; 15 - display screen / module; 17 - printed circuit board; 19 - middle frame; 21 - back cover; 01 - signal source; 02 - switch switching circuit; 03 - first radiator; 031 - first feeding point; 032 - first open end; 033 - first ground point; 034 - sub-branch; 04 - third radiator; 041 - third feeding point; 05 - second radiator; 051 - second feeding point; 052 - second open end; 053 - second ground point. DETAILED DESCRIPTION

[0104] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0105] The terms used in the following examples are for the purpose of describing particular embodiments only and are not intended to be limiting of the present application. As used in this specification and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0106] Reference to "one embodiment" or "an embodiment" or "a specific embodiment" or "certain embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" or "in a specific embodiment" or "in certain embodiments" in various places in the specification are not necessarily all referring to the same embodiment.

[0107] The following explains the terms that can appear in the embodiments of the present application.

[0108] Radiating element: is a device in an antenna that is used to receive / transmit electromagnetic wave radiation. In some cases, "antenna" is understood in a narrow sense as a radiating element that changes guided wave energy from a transmitter into radio waves or vice versa, for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiating element via a feed line, which is converted into electromagnetic wave energy of a certain polarization by the radiating element and radiated in the desired direction. The receiving radiating element converts electromagnetic wave energy of a certain polarization from a certain direction in space into modulated high-frequency current energy, which is delivered to the input of the receiver via a feed line.

[0109] RF chip: is a combination of all components of an antenna for the reception and transmission of radio 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 considered as the part after the last power amplifier. In some cases, the RF chip can also be understood as a feed unit. The RF chip has the function of converting radio waves into electrical signals and sending them to the receiver components. Usually, it is considered as part of the antenna 3 for converting radio waves into electrical signals and vice versa. The antenna should be designed to maximize the possibility of power transmission and efficiency. To this end, the antenna feed impedance must be matched to the load resistance. The antenna feed impedance is a combination of resistance, capacitance and inductance. To ensure maximum power transmission conditions, the two impedances (load resistance and feed impedance) should be matched. Matching can be done by considering the frequency requirements and design parameters of the antenna (such as gain, directivity and radiation efficiency).

[0110] Antenna pattern: also known as radiation pattern. It refers to the relative field strength (normalized modulus) of the antenna radiation field at a certain distance from the antenna as a function of direction. It is usually represented by two mutually perpendicular plane patterns through the maximum radiation direction of the antenna.

[0111] Antenna patterns usually have multiple radiation beams. The radiation beam with the highest intensity is called the main lobe, and the remaining radiation beams are called side lobes or side lobes. In the side lobes, the side lobe in the opposite direction of the main lobe is also called the back lobe.

[0112] Radiation efficiency: refers to the ratio of the power radiated by the antenna into space (i.e., the power effectively converted into electromagnetic waves) to the active power input into the antenna. Among them, the active power input into 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, dielectric loss are all factors affecting radiation efficiency.

[0113] As can be understood by those skilled in the art, radiation efficiency is generally expressed in percentage, and there is a corresponding conversion relationship between percentage and dB. The closer the radiation efficiency is to 0dB, the better the radiation efficiency of the antenna is represented.

[0114] dB: is decibel, which is a logarithmic concept with a base of ten. Decibel is only used to evaluate the ratio between one physical quantity and another physical quantity, and it itself has no physical dimension. The ratio between the two quantities increases by 10 times, and the difference between them 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. That is, 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 two quantities.

[0115] End: "end" in the open end of the radiator, which cannot be understood as a point or end that is physically disconnected from other radiators. It can also be considered as a section of the radiator including the first end point, which is the end point of the radiator at the gap. For example, the open end of the radiator can be considered as a section of the radiator within one-eighth of the first wavelength from the first end point, where the first wavelength can be the wavelength corresponding to the working frequency band of the radiator, the wavelength corresponding to the center frequency of the working frequency band, or the wavelength corresponding to the resonance point. In an embodiment, the "end / point" can include a connection / coupling area on the radiator that is coupled to other conductive structures, for example, a feed end / feed point can be a coupling area (e.g., an area facing a part of the feed structure) on the antenna radiator that is coupled to a feed structure, and for example, a ground point / ground point can be a connection / coupling area on the antenna radiator that is coupled to a ground structure.

[0116] Open end: In some embodiments, the open end is relative to whether it is grounded or not. In an embodiment, the open end can also be referred to as a suspended end, a free end, an open end, or an open circuit end. It should be understood that in some embodiments, other conductors can be coupled through the open end to transfer coupled energy (which can be understood as transferring current).

[0117] In a simple understanding, the "open end" of the radiator can be that one end of the radiator is spaced apart from the floor or coupled to the floor through a capacitive device.

[0118] In a simple understanding, the "ground point" of the radiator can be that one end of the radiator is directly connected to the floor or coupled to the floor through an inductive device.

[0119] Capacitance: can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance includes components that are capacitive, such as a capacitor element; distributed capacitance (or distributed capacitance) includes an equivalent capacitance formed by two conductive parts spaced apart by a certain gap.

[0120] Located "close" to the end of the slot of the radiator: specifically, it can refer to a region located within 10 mm of the end of the radiator facing the slot, for example, located at a position of 8 mm of the end of the radiator facing the slot, or located at a position of 5 mm of the end of the radiator facing the slot. Alternatively, it can also refer to a region located within 1 / 4 of the overall length of the end of the radiator facing the slot, for example, located within 1 / 8 of the overall length of the end of the radiator facing the slot.

[0121] FIG. 1 is a schematic diagram of a structure of a mobile terminal in an embodiment of the present application. As shown in FIG. 1, the mobile terminal 10 can include a cover 13, a display 15, a printed circuit board (PCB) 17, a middle frame 19, and a rear cover 21. It should be understood that in some embodiments, the cover 13 can be a cover glass, which can be replaced by a cover made of other materials, such as a cover made of ultra-thin glass material, a cover made of PET (Polyethylene terephthalate) material, etc.

[0122] The cover 13 can be arranged close to the display 15, and can be mainly used to protect and prevent dust from entering the display 15.

[0123] In an embodiment, the display 15 can include a liquid crystal display (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., and the present application does not limit this.

[0124] The middle frame 19 mainly serves as a support for the whole device. In FIG. 1, the PCB 17 is shown to be disposed between the middle frame 19 and the back cover 21. It should be understood that in one embodiment, the PCB 17 can also be disposed between the middle frame 19 and the display screen 15, which is not limited in the present application. The printed circuit board (PCB) 17 can be made of a flame retardant material (FR-4) medium plate, a Rogers medium plate, a hybrid medium plate of Rogers and FR-4, etc. Here, FR-4 is a code for a flame retardant material grade, and the Rogers medium plate is a high-frequency board. The PCB 17 carries electronic components such as radio frequency chips, etc.

[0125] In one embodiment, a metal layer can be disposed on the PCB 17. The metal layer can be used for grounding the electronic components carried on the PCB 17, and can also be used for grounding other components such as a bracket antenna, a frame antenna, etc. The metal layer can be referred to as a ground plate, or a grounding plate, or a grounding layer. In one embodiment, the metal layer can be formed by etching metal on the surface of any one of the medium plates in the PCB 17. In one embodiment, the metal layer for grounding can be disposed on one side of the PCB 17 close to the middle frame 19. In one embodiment, the edge of the PCB 17 can be regarded as the edge of its grounding layer. In one embodiment, the metal middle frame 19 can also be used for grounding the above-mentioned components. The mobile terminal 10 can also have other ground plates / grounding plates / grounding layers, which are not described here again as described before.

[0126] The mobile terminal 10 can also include a battery (not shown in the figure). The battery can be disposed between the middle frame 19 and the back cover 21, or can be disposed between the middle frame 19 and the display screen 15, which is not limited in the present application. In some embodiments, the PCB 17 is divided into a main board and a sub-board, and the battery can be disposed between the main board and the sub-board. The main board can be disposed between the middle frame 19 and the upper edge of the battery, and the sub-board can be disposed between the middle frame 19 and the lower edge of the battery.

[0127] The mobile terminal 10 can further include a bezel 11, which can be formed of a conductive material such as metal. The bezel 11 can be disposed between the display screen 15 and the back cover 21 and extend circumferentially around the periphery of the mobile terminal 10. Alternatively, it can also be understood that the display screen 15 and the back cover 21 are fixed to two sides of the bezel 11, respectively. Specifically, the bezel 11 can have four side frames surrounding the display screen 15 to help fix the display screen 15. In one implementation, the bezel 11 made of metal material can be directly used as a metal bezel of the mobile terminal 10 to form a metal bezel appearance, which is suitable for metal industrial design (ID). In another implementation, the outer surface of the bezel 11 can also be a non-metal material, such as a plastic bezel, to form a non-metal bezel appearance, which is suitable for non-metal ID.

[0128] In one embodiment, the middle frame 19 can include the bezel 11, and the middle frame 19 including the bezel 11 can serve as a support for the electronic devices in the whole machine as a one-piece. The cover plate 13 and the back cover 21 are respectively covered along the upper and lower edges of the bezel to form a housing of the mobile terminal. Alternatively, the bezel 11 can not be considered as a part of the middle frame 19. In one embodiment, the bezel 11 can be connected to and integrally formed with the middle frame 19. In another embodiment, the bezel 11 can include a protruding piece extending inwardly to be connected to the middle frame 19, for example, by a spring, a screw, welding, or the like. In one embodiment, the cover plate 13, the back cover 21, the bezel 11, and the middle frame 19 can be collectively referred to as a housing of the mobile terminal 10. It can be understood that the "housing" can be used to refer to part or all of any one of the cover plate 13, the back cover 21, the bezel 11, or the middle frame 19, or part or all of any combination of the cover plate 13, the back cover 21, the bezel 11, or the middle frame 19.

[0129] The back cover 21 can be a back cover made of metal material; or a back cover made of non-conductive material, such as a glass back cover, a plastic back cover, or the like non-metal back cover; or a back cover including both conductive material and non-conductive material.

[0130] In one embodiment, the bezel 11 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals. The portion of the bezel serving as the antenna radiator can be separated from other portions of the middle frame 19 or the middle frame 19, and a gap can exist between the portion of the bezel serving as the antenna radiator and other portions of the middle frame 19 or the middle frame 19, so as to ensure that the antenna radiator has a good radiation environment. In one embodiment, an aperture can be provided near the portion of the bezel serving as the antenna radiator. In one embodiment, the aperture can include an internal aperture provided inside the mobile terminal 10, such as an aperture that is not visible from the appearance of the mobile terminal 10. In one embodiment, the internal aperture can be formed by any one of or a combination of the middle frame, the battery, the circuit board, the back cover, the display screen, and other internal conductive components, such as the internal aperture being formed by a structural member of the middle frame. In one embodiment, the aperture can also include a slit / slot / hole provided on the bezel 11. In one embodiment, the slit / slot / hole on the bezel 11 can be a break formed on the bezel 11, and the bezel 11 is divided into two portions at the break, which are not directly connected. In one embodiment, the aperture can also include a slit / slot / hole provided on the back cover 21 or the display screen 15. In one embodiment, the back cover 21 includes a conductive material, and the aperture provided at the conductive material can be in communication with the slot or break of the bezel to form a continuous aperture on the appearance of the mobile terminal 10.

[0131] In one embodiment, the bezel 11 includes a protruding member extending inwardly and configured to be connected to (in one embodiment, integrally formed with) other portions of the middle frame 19. In one embodiment, the protruding member includes a conductive material and can serve as a sub-branch of the antenna radiator to receive a feeding signal or connect to a ground plane, so that the corresponding portion of the bezel receives / transmits radio frequency signals.

[0132] In one embodiment, the antenna of the mobile terminal 10 can also be provided in the bezel 11. The bezel 11 includes a non-conductive material, and the antenna radiator can be located inside the mobile terminal 10 and provided along the bezel 11, or the antenna radiator can be at least partially embedded in the non-conductive material of the bezel. In one embodiment, the antenna radiator is provided against the non-conductive material of the bezel 11 to minimize the volume occupied by the antenna radiator and to be closer to the outside of the mobile terminal 10 to achieve better signal transmission effect. It should be noted that the antenna radiator provided against the bezel 11 means that the antenna radiator can be closely provided against the bezel 11, or can be provided close to the bezel 11, such as the antenna radiator and the bezel 11 being able to have a small gap therebetween.

[0133] FIG. 1 only schematically shows some components included in the mobile terminal 10, and the actual shape, actual size, and actual structure of these components are not limited by FIG. 1.

[0134] It should be understood that in the embodiments of the present application, when a user holds (in the embodiments of the present application, holds vertically and faces the back cover) the mobile terminal, the orientation of the mobile terminal is considered to have a top, a bottom, a left side and a right side.

[0135] FIG. 2 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in FIG. 2, in an embodiment, the frame includes a top frame 111, a first side frame 112 and a second side frame 113. The top frame 111 is located at the top of the mobile terminal. The first side frame 112, the top frame 111 and the second side frame 113 are sequentially arranged in a clockwise direction from the back cover side. As shown in FIG. 2, from the back cover side, the first side frame 112, the top frame 111 and the second side frame 113 are sequentially arranged in a clockwise direction. From the perspective of a user, when the user holds the mobile terminal vertically and faces the back cover of the mobile terminal, the first side frame 112 is the left side frame and the second side frame 113 is the right side frame.

[0136] The antenna of the mobile terminal according to an embodiment of the present application includes a signal source 01 and a first radiator 03. The first radiator 03 is an L-shaped radiator, and a part of the first radiator 03 is located at the top frame 111 and another part is located at the second side frame 113. From the back cover side, the first radiator 03 is located at the upper right corner of the frame. The signal source 01 of the above-mentioned antenna is used to provide a radio frequency transmission signal of a satellite communication frequency band to realize satellite communication of the mobile terminal. In a specific embodiment, the signal source 01 can be a radio frequency chip. The first radiator 03 includes a first feeding point 031, and the first feeding point 031 is connected with the signal source 01, so that the first radiator 03 communicates with a satellite. Specifically, the mobile terminal realizes a left-hand satellite communication state, and uses the first radiator 03 to perform left-hand satellite communication. Left-hand satellite communication refers to that a user holds the mobile terminal with the left hand and pastes the mobile terminal to the left side of the head, and listens to the earpiece voice with the left ear to perform communication with a communication satellite.

[0137] It should be noted that the working process of the antenna provided in the present application refers to the process of transmitting signals by the antenna in the satellite communication process. For example, in the above-mentioned embodiment, the mobile terminal transmits signals by using the first radiator during a call, but can receive signals by using the first radiator, or receive signals by using other radiators, or receive signals by using other radiators in cooperation with the first radiator, and the like.

[0138] In a specific embodiment, the mobile terminal is in a left-hand satellite communication state, and the first radiator 03 has a gain point with an antenna gain greater than or equal to -8dbic in a range of 25° to 65° in the elevation angle. The elevation angle can refer to an angle between the beam and the vertical direction, and specifically, the elevation angle can be considered as an elevation angle in the human body coordinate system. In this scheme, the first radiator 03 has an antenna gain greater than or equal to -8dbic, which can better communicate with the satellite, so that the mobile terminal realizes left-hand satellite communication.

[0139] In some embodiments, the mobile terminal can also be in a left-hand satellite communication state, and there is a gain point with an antenna gain greater than or equal to -8dbic in the upper hemisphere in the human body coordinate system, and there is a beam that meets the satellite communication link requirements.

[0140] Please continue to refer to FIG. 2. In the embodiment of the present application, a first current can be formed on the first radiator 03, and the first current flows from the second side frame 113 to the top frame 111. From the rear cover side, the current on the first radiator 03 flows in the counterclockwise direction. Alternatively, FIG. 3 is a schematic diagram of a back side structure of the mobile terminal in an embodiment of the present application. As shown in FIG. 3, in an embodiment, the first current can also flow from the top frame 111 to the second side frame 113, and from the rear cover side, the current on the first radiator 03 flows in the clockwise direction. In summary, the first current flows in the same direction on the first radiator 03, which can obtain a better upper hemisphere radiation pattern and is beneficial to realize satellite communication.

[0141] FIG. 4 is a diagram of the first radiator 03 in free space in an embodiment of the present application, FIG. 5 is an axial ratio diagram of the first radiator 03 in free space in an embodiment of the present application, and FIG. 6 is a left-hand circular polarization diagram of the first radiator 03 in free space in an embodiment of the present application. As shown in FIGS. 4 to 6, the first radiator 03 provided in the embodiment of the present application can realize upper hemisphere coverage enhancement of the first radiator 03, and has strong satellite communication capability and satellite communication effect.

[0142] In the application scenario of left-hand satellite communication of the mobile terminal, the communication effect of the first radiator 03 is greatly affected by the human hand and the human head. Therefore, the inventors have simulated and analyzed the scenario of left-hand satellite communication of the mobile terminal. FIG. 7 is a schematic diagram of the mobile terminal in a left-hand satellite communication state according to an embodiment of the present application. As shown in FIG. 7, in the application scenario of left-hand satellite communication of the mobile terminal, the extension direction of the second side frame 113 of the mobile terminal is approximately 45° to the vertical direction. On the back cover side, the first radiator 03 is located at the upper right corner of the mobile terminal. In the left-hand satellite communication state, the first radiator 03 is located at the lower right of the mobile terminal, and is located in the lower region of the human head relative to the human head. The distance between the human head and the first radiator 03 of the mobile terminal is relatively far, and the human head has a relatively small influence on the radiator signal of the first radiator 03 of the mobile terminal. FIG. 8 is a radiation pattern of the first radiator 03 in a left-hand satellite communication state according to an embodiment of the present application. FIG. 9 is an axial ratio schematic diagram of the first radiator 03 in a left-hand satellite communication state according to an embodiment of the present application. FIG. 10 is a left-hand circular polarization radiation pattern of the first radiator 03 in a left-hand satellite communication state according to an embodiment of the present application. As shown in FIGS. 8-10, in the left-hand satellite communication state of the first radiator 03 provided in the embodiment of the present application, the human head has a small influence on the radiation pattern of the first radiator 03, and the radiation pattern is still directed to the upper hemisphere. In addition, the normal electric field generated between the antenna and the human head can combine with the original tangential field of the mobile terminal to produce left-hand circular polarization radiation, thereby achieving a better left-hand circular polarization radiation pattern. In summary, the first radiator 03 in the embodiment of the present application can achieve better left-hand satellite communication.

[0143] FIG. 11 is a radiation efficiency comparison diagram of the first radiator 03 in free space and in a left-hand satellite communication state according to an embodiment of the present application. As shown in FIG. 11, the solid line in the diagram represents the radiation efficiency curve of the first radiator 03 in free space, and the dashed line represents the radiation efficiency curve of the first radiator 03 in a left-hand satellite communication state. It can be seen that the human head and the human hand have a small influence on the radiation efficiency of the first radiator 03 provided in the present application, and the head-hand efficiency has a very low decrease. The antenna radiation efficiency is high, and the radiation efficiency of the first radiator 03 can meet the requirements of satellite communication.

[0144] The specific structure of the first radiator 03 described above has multiple choices. In the embodiment shown in FIG. 2, the first side frame 112 of the frame of the mobile terminal includes a first slit 1121, the second side frame 113 includes a second slit 1131, and the first radiator 03 is located between the first slit 1121 and the second slit 1131.

[0145] In a specific embodiment, the first feeding point 031 is located at one end of the first radiating body 03 close to the first slot 1121, that is, the first feeding point 031 is located at the top frame 111 and feeds at a position of the top frame 111 close to the first slot 1121. The first open end 032 of the first radiating body 03 close to the second slot 1131 can be connected with a capacitor or an inductor or the like for tuning. In this scheme, the first radiating body 03 is a 1 / 2 wavelength antenna, and the flow direction of the first current generated by the first radiating body 03 is from the second side frame 113 to the top frame 111. The first feeding point 031 is located at the top frame 111, which is convenient for making the satellite communication system compatible with the cellular communication system and is conducive to enhancing the antenna gain.

[0146] FIG. 12 is a schematic diagram of a back side structure of a mobile terminal in an embodiment of the present application. As shown in FIG. 12, in an embodiment, the first feeding point 031 is located at one end of the first radiating body 03 close to the second slot 1131, that is, the first feeding point 031 is located at the second side frame 113 and feeds at a position of the second side frame 113 close to the second slot 1131. The first open end 032 of the first radiating body 03 close to the first slot 1121 can be connected with a capacitor or an inductor or the like for tuning. In this scheme, the first radiating body 03 is a 1 / 2 wavelength antenna.

[0147] FIG. 13 is a schematic diagram of a back side structure of a mobile terminal in an embodiment of the present application. As shown in FIGS. 12 and 13, in an embodiment, the first radiating body 03 further includes a first grounding point 033 located between the first feeding point 031 and the first open end 032. In a specific embodiment, a sub-branch 034 can be arranged on the first radiating body 03, and the sub-branch 034 is connected with the ground plate to realize the grounding of the first radiating body 03. In the present application, the first radiating body 03 can be grounded or not grounded. As shown in FIG. 12, the grounding of the middle part of the first radiating body 03 is also conducive to improving the radiation signal capability of the first radiating body and the satellite communication capability of the mobile terminal.

[0148] FIG. 14 is a current distribution diagram of the first radiating body 03 in an embodiment of the present application. In the embodiment shown in FIG. 14, the middle part of the first radiating body 03 includes a sub-branch 034, and the sub-branch 034 is grounded to realize the grounding of the first radiating body 03. In this embodiment, the current distribution is uneven, and the current of the part of the first radiating body 03 located at the first side frame 112 is relatively strong, and the current of the first radiating body 03 is uneven. However, it has good implementability and can meet the communication demand. FIG. 15 is a schematic diagram of a simulation result of a mobile terminal in an embodiment of the present application. FIG. 15 shows the simulation result corresponding to the first radiating body 03 shown in FIG. 14. As shown in FIG. 15, in the embodiment of the present application, the communication capability of the mobile terminal is relatively strong and can meet the communication demand.

[0149] FIG. 16 is a current distribution diagram of the first radiator 03 in an embodiment of the present application. In the embodiment shown in FIG. 16, the middle part of the first radiator 03 is not grounded. In this embodiment, the current distribution is relatively uniform. FIG. 17 is a simulation result diagram of a mobile terminal in an embodiment of the present application. FIG. 17 shows the simulation result corresponding to the first radiator 03 shown in FIG. 16. As shown in FIG. 17, in the embodiment of the present application, the communication capability of the mobile terminal is stronger, and the communication requirement can be better satisfied.

[0150] FIG. 18 is a back side structure diagram of a mobile terminal in an embodiment of the present application. As shown in FIG. 18, in an embodiment, the antenna further includes a switch switching circuit 02 and a third radiator 04. The third radiator 04 is located at the top frame 111 of the frame. The third radiator 04 includes a third feeding point 041. The switch switching circuit 02 is connected between the signal source 01 and the first feeding point 031 and the third feeding point 041. The switch switching circuit 02 can be used to electrically connect the signal source 01 with the first feeding point 031 or the third feeding point 041, so that the first radiator 03 is in a working state for satellite communication, or the third radiator 04 is in a working state for satellite communication. When the mobile terminal is in a handheld communication state, the switch switching circuit 02 electrically connects the signal source 01 with the first feeding point 031 or the third feeding point 041, that is, the first radiator 03 or the third radiator 04 can be selected to communicate with the satellite. The handheld communication state of the mobile terminal means that the user holds the mobile terminal, but the mobile terminal is not used close to the ear, for example, the mobile terminal is in an external playing state, a public playing state or a speaker state. In the embodiment of the present application, in addition to selecting the first radiator 03 to communicate with the satellite, the third radiator 04 can also be selected to communicate with the satellite, so as to improve the communication effect of the mobile terminal in the handheld state, and also help to reduce the difficulty of satellite pointing in the satellite communication process of the mobile terminal. In the present application, the first radiator 03 can be used to realize the handheld communication of the user in addition to realizing the left head satellite communication of the user. That is, the first radiator 03 can be used to realize the earpiece call and the speaker call. This scheme can improve the effect of the handheld communication state and enrich the functions of the first radiator 03.

[0151] In some embodiments, the switch switching circuit 02 can also be connected to the first feeding point 031 and the third feeding point 041 and the signal source 01, that is, the first feeding point 031 and the third feeding point 041 are both electrically connected to the signal source 01. Then, in the handheld communication state of the mobile terminal, the first radiator 03 and the third radiator 04 are used to communicate with the satellite. So as to improve the communication effect of the mobile terminal in the handheld communication state.

[0152] Fig. 19 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in Fig. 19, the present application also provides a mobile terminal capable of right-hand head communication. The antenna in this embodiment includes a signal source 01 and a second radiator 05, and the second radiator 05 is located at the first side frame 112 or the second side frame 113. In summary, the second radiator 05 is located at the side frame adjacent to the top frame 111, and on the back cover side, the second radiator 05 is located at the left side or the right side of the frame. The signal source 01 of the above-mentioned antenna is used to provide a radio frequency transmission signal in a satellite communication frequency band, so as to realize satellite communication of the mobile terminal. In a specific embodiment, the signal source 01 can be a radio frequency chip. The second radiator 05 includes a second feeding point 051, and when the mobile terminal is in a right-hand head satellite communication state, the second feeding point 051 is electrically connected with the signal source 01. Specifically, the right-hand head satellite communication state of the mobile terminal is realized, and the right-hand head satellite communication is performed by using the second radiator 05. The right-hand head satellite communication refers to that a user holds the mobile terminal with the right hand and pastes the mobile terminal to the right side of the head, and listens to the earpiece voice with the right ear, so as to perform communication by using a communication satellite.

[0153] In a specific embodiment, when the mobile terminal is in the right-hand head satellite communication state, the radiation beam of the second radiator 05 has a gain point with an antenna gain greater than or equal to -8dbic in a range of 25° to 65° in the elevation angle. The elevation angle can refer to the angle between the beam and the vertical direction. In this scheme, the antenna gain of the second radiator 05 is greater than or equal to -8dbic, which can better communicate with the satellite, so that the mobile terminal realizes the right-hand head satellite communication.

[0154] In some embodiments, the mobile terminal can also be caused to have a gain point with an antenna gain greater than or equal to -8dbic in the upper hemisphere in the human body coordinate system when the mobile terminal is in the right-hand head satellite communication state, and the beam that meets the satellite communication link requirement exists.

[0155] As shown in Fig. 19, in the embodiment of the present application, a second current can be formed on the second radiator 05, and the second current flows towards the top frame 111. From the back cover side, the current on the second radiator 05 also flows in the counterclockwise direction. Alternatively, Fig. 20 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in Fig. 20, in an embodiment, the second current can also flow away from the top frame 111, and from the back cover side, the current on the second radiator 05 flows in the clockwise direction. In summary, the second current flows in the same direction on the second radiator 05, a better upper hemisphere radiation pattern can be obtained, the second radiator has stronger signal radiation capability, and the radiation direction is better towards the satellite, which can have better satellite communication effect.

[0156] For the structure of the second radiator 05 in the embodiment shown in FIG. 19, aspects of performance are analyzed. In the application scenario of right-hand satellite communication of the mobile terminal, the communication effect of the second radiator 05 is greatly affected by the human hand and the human head. Therefore, the inventors have simulated and analyzed the scenario of right-hand satellite communication of the mobile terminal. FIG. 21 is a schematic diagram of the mobile terminal in a right-hand satellite communication state according to an embodiment of the present application. As shown in FIG. 21, in the application scenario of right-hand satellite communication of the mobile terminal, the extension direction of the second side frame 113 of the mobile terminal is approximately 45° to the vertical direction. On the back cover side, the second radiator 05 is located at the upper right of the mobile terminal. In the right-hand satellite communication state, the second radiator 05 is located at the upper right of the mobile terminal. FIG. 22 is a radiation pattern of the second radiator 05 in a right-hand satellite communication state according to an embodiment of the present application. FIG. 23 is an axial ratio diagram of the second radiator 05 in a right-hand satellite communication state according to an embodiment of the present application. FIG. 24 is a left-hand circular polarization radiation pattern of the second radiator 05 in a right-hand satellite communication state according to an embodiment of the present application. As shown in FIGS. 21-24, in the right-hand satellite communication state of the second radiator 05 provided in the embodiment of the present application, the human head has little effect on the radiation pattern of the second radiator 05, and the left-hand circular polarization radiation pattern is still directed to the upper hemisphere. In addition, the normal electric field generated between the antenna and the human head, in combination with the original tangential field of the mobile terminal, can produce left-hand circular polarization radiation, thereby forming a better left-hand circular polarization radiation pattern. In summary, the second radiator 05 in the embodiment of the present application can achieve better right-hand satellite communication.

[0157] FIG. 25 is a radiation efficiency comparison diagram of the second radiator 05 in free space and in a right-hand satellite communication state according to an embodiment of the present application. As shown in FIG. 25, the solid line in the diagram represents the radiation efficiency curve of the second radiator 05 in free space, and the dashed line represents the radiation efficiency curve of the second radiator 05 in a right-hand satellite communication state. It can be seen that the human head and the human hand have little effect on the radiation efficiency of the second radiator 05 provided in the present application, and the head-hand efficiency decreases very little. The radiation efficiency of the second radiator 05 can meet the requirements of satellite communication in a right-hand satellite communication state.

[0158] There are various choices for the specific structure of the second radiator 05 described above. Specifically, the second radiator 05 can be located at the first side frame 112, or the second radiator 05 can be located at the second side frame 113. In addition, the second radiator 05 can be formed by setting two slots, or the second radiator 05 can also be formed by setting one slot. The specific structure of the second radiator 05 in the embodiment of the present application will be introduced in various cases in combination with the drawings.

[0159] FIG. 26 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application, FIG. 27 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application, and FIG. 28 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application. In the embodiments shown in FIG. 19, FIG. 26, and FIG. 28, the second radiator 05 is located in the second side frame 113, and the second side frame 113 includes two slits to form the second radiator 05. Specifically, the second side frame 113 includes a third slit 1132 and a fourth slit 1133 arranged away from the top frame 111, the third slit 1132 is closer to the top frame 111 than the fourth slit 1133, and the second radiator 05 is located between the third slit 1132 and the fourth slit 1133.

[0160] As shown in FIG. 19 and FIG. 26, in an embodiment, the second feeding point 051 is located at one end of the second radiator 05 close to the third slit 1132, and the other end of the second radiator 05 close to the fourth slit 1133 is the second open end 052, which can be connected with a capacitor or an inductor or the like for tuning. In this scheme, the second radiator 05 is a 1 / 2 wavelength antenna.

[0161] As shown in FIG. 27 and FIG. 28, in an embodiment, the second feeding point 051 is located at one end of the second radiator 05 close to the fourth slit 1133, and the other end of the second radiator 05 close to the third slit 1132 is the second open end 052, which can be connected with a capacitor or an inductor or the like for tuning. In this scheme, the second radiator 05 is also a 1 / 2 wavelength antenna.

[0162] As shown in FIG. 26 and FIG. 28, in an embodiment, the second radiator 05 further includes a second grounding point 053, which is located between the second feeding point 051 and the second open end 052. In a specific embodiment, a sub-branch can be provided on the second radiator 05, and the sub-branch is connected to the ground plate to achieve grounding of the second radiator 05. In the present application, the second radiator 05 can be grounded or not grounded, as shown in the embodiments of FIG. 20 and FIG. 32, the second radiator 05 is not grounded.

[0163] FIG. 29 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in FIG. 29, in an embodiment, the second side frame 113 includes the fourth slit 1133, the second side frame 113 includes the second grounding point 053, which is located between the fourth slit 1133 and the top frame 111, the second radiator 05 is located between the fourth slit 1133 and the second grounding point 053, and the second feeding point 051 is located at one end of the second radiator 05 close to the fourth slit 1133. The second radiator 05 is a 1 / 4 wavelength antenna.

[0164] As shown in FIGS. 26-29, in the embodiments of the present application, the second current can be formed on the second radiator 05, and the second current flows towards the top frame 111. From the back cover side, the current on the second radiator 05 flows in the counterclockwise direction. Alternatively, FIG. 30 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in FIG. 30, in an embodiment, the second current can also be made to flow away from the top frame 111, and from the back cover side, the current on the first radiator 03 flows in the counterclockwise direction. In summary, the second current flows in the same direction on the second radiator 05, and a better upper hemisphere radiation pattern can be obtained, the second radiator 05 has a stronger radiation signal capability, and the direction of the radiation signal is towards the satellite, which facilitates satellite communication and improves the satellite communication effect.

[0165] Similar to the embodiment shown in FIG. 19, in the embodiments of the present application, the second radiator 05 is in the right-hand satellite communication state, and the human head has a small effect on the pattern of the second radiator 05, and the left-hand circularly polarized pattern is still directed to the upper hemisphere. In addition, due to the normal electric field generated between the antenna and the human head, in combination with the original tangential field of the mobile terminal, a left-hand circularly polarized radiation can be generated, thereby forming a better left-hand circularly polarized pattern. In summary, the second radiator 05 in the embodiments of the present application can also achieve better right-hand satellite communication.

[0166] FIG. 31 is a comparison diagram of the radiation efficiency of the second radiator 05 in free space and in the right-hand satellite communication state according to an embodiment of the present application. As shown in FIG. 31, the solid line in the diagram represents the radiation efficiency curve of the second radiator 05 in free space, and the dashed line represents the radiation efficiency curve of the second radiator 05 in the right-hand satellite communication state. As can be seen, the human head and hand have a small effect on the radiation efficiency of the second radiator 05 provided by the present application, and the head-hand efficiency decreases very little, and the radiation efficiency of the second radiator 05 can meet the requirements of satellite communication.

[0167] Please refer to FIG. 31-33, in the embodiment of the present application, the distance L1 between the second radiator 05 and the top frame 111 near one end of the fourth slot 1133 satisfies: 40mm≤L1≤80mm. Whether the second side frame 113 includes one slot or two slots, the distance between the slot below the second radiator 05 and the top frame 111 is 40mm-80mm, which is beneficial to reduce the influence of the head-hand efficiency, improve the radiation efficiency of the second radiator, and improve the satellite communication effect of the mobile terminal. For example, Table 1 is a table of head-hand efficiency when the distance between the fourth slot 1133 and the top frame 111 is different when the second side frame 113 includes two slots, the third slot 1132 and the fourth slot 1133, to form the second radiator 05; Table 2 is a table of head-hand efficiency when the distance between the fourth slot 1133 and the top frame 111 is different when the second side frame 113 includes only one slot, the fourth slot 1133, to form the second radiator 05. Specifically, the values in Table 1 and Table 2 are simulated under the satellite transmission power of the mobile terminal. As shown in Table 1 and Table 2, as the slot position below the second radiator 05 moves down, the distance between the second radiator 05 and the human head is greater, and the head-hand efficiency is greater. However, in order to prevent the second radiator 05 from being held by the human hand and reduce the influence of the human hand on the radiation efficiency of the second radiator 05, the distance between the slot below the second radiator 05 and the top frame 111 is not more than 80mm, thereby improving the radiation efficiency of the second radiator 05 to improve the communication effect.

[0168] Table 1

[0169] Table 2

[0170] In one embodiment, the length L of the second radiator 05 satisfies: 20mm≤L≤40mm. So that the second radiator 05 has better radiation efficiency, and improves the satellite communication effect of the mobile terminal.

[0171] FIG. 32 is a schematic diagram of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in FIG. 32, in one embodiment, the second radiator 05 provided by the present application can also be located on the first side frame 112, and the first side frame 112 includes two slots to form the second radiator 05. Specifically, the first side frame 112 includes a third slot 1132 and a fourth slot 1133 arranged away from the top frame 111, and the distance between the third slot and the top frame is less than the distance between the fourth slot and the top frame. The second radiator 05 is located between the third slot 1132 and the fourth slot 1133.

[0172] As shown in FIG. 32, in the embodiment of the present application, the second current can be formed on the second radiator 05, and the second current flows towards the top frame 111. From the back cover side, the second current on the second radiator 05 flows in the clockwise direction. FIG. 33 is a schematic diagram of a back side structure of a mobile terminal in an embodiment of the present application. As shown in FIG. 33, in an embodiment, the second current on the second radiator 05 flows away from the top frame 111. From the back cover side, the second current on the second radiator 05 flows in the counterclockwise direction. In summary, the second current flows in the same direction on the second radiator 05, and a better upper hemisphere radiation pattern can be obtained, which is beneficial to improving the effect of satellite communication.

[0173] In the application scenario of right-hand head satellite communication of the mobile terminal, the communication effect of the above-mentioned second radiator 05 is greatly affected by the human hand and the human head. Therefore, the inventors have simulated and analyzed the scenario of right-hand head satellite communication of the mobile terminal. FIG. 34 is a schematic diagram of a mobile terminal in a right-hand head satellite communication state in an embodiment of the present application. As shown in FIG. 34, in the application scenario of right-hand head satellite communication of the mobile terminal, the extension direction of the first side frame 112 of the mobile terminal is approximately 45° to the vertical direction. From the back cover side, the second radiator 05 is located at the upper left of the mobile terminal, and in the right-hand head satellite communication state, the second radiator 05 is located at the upper left of the mobile terminal. FIG. 35 is a radiation pattern of the second radiator 05 in a right-hand head satellite communication state in an embodiment of the present application. FIG. 36 is an axial ratio schematic diagram of the second radiator 05 in a right-hand head satellite communication state in an embodiment of the present application. FIG. 37 is a left-hand circular polarization radiation pattern of the second radiator 05 in a right-hand head satellite communication state in an embodiment of the present application. As shown in FIGS. 34-37, in the right-hand head satellite communication state of the second radiator 05 provided in the embodiment of the present application, the human head has little effect on the radiation pattern of the second radiator 05, and the left-hand circular polarization radiation pattern is still towards the upper hemisphere. In addition, the normal electric field generated between the antenna and the human head can combine with the original tangential field of the mobile terminal to produce left-hand circular polarization radiation, thereby forming a better left-hand circular polarization radiation pattern. In summary, the second radiator 05 in the embodiment of the present application can achieve better right-hand head satellite communication.

[0174] FIG. 38 is a radiation efficiency comparison diagram of the second radiator 05 in free space and in a right-hand head satellite communication state in an embodiment of the present application. As shown in FIG. 38, the solid line in the diagram represents the radiation efficiency curve of the second radiator 05 in free space, and the dashed line represents the radiation efficiency curve of the second radiator 05 in a right-hand head satellite communication state. It can be seen that the human head and the human hand have little effect on the radiation efficiency of the second radiator 05 provided in the present application, and the head-hand efficiency decreases very little. The radiation efficiency of the second radiator 05 can meet the requirements of satellite communication.

[0175] Fig. 39 to Fig. 41 are schematic diagrams of several backside structures of the mobile terminal in the embodiments of the present application. In the embodiment shown in Fig. 42, the second radiator 05 is located at the first side frame 112, and the second radiator 05 is located between the third slit 1132 and the fourth slit 1133, which has several specific structures.

[0176] As shown in Fig. 32 and Fig. 39, in one embodiment, the second feeding point 051 is located at one end of the second radiator 05 close to the third slit 1132, and the other end of the second radiator 05 close to the fourth slit 1133 is the second open end 052, which can be connected with a capacitor or an inductor and the like for tuning. In this scheme, the second radiator 05 is a 1 / 2 wavelength antenna, and the flow direction of the second current generated by the second radiator 05 is towards the top frame 111.

[0177] As shown in Fig. 40 and Fig. 41, in one embodiment, the second feeding point 051 is located at one end of the second radiator 05 close to the fourth slit 1133, and the other end of the second radiator 05 close to the third slit 1132 is the second open end 052, which can be connected with a capacitor or an inductor and the like for tuning. In this scheme, the second radiator 05 is also a 1 / 2 wavelength antenna, and the flow direction of the second current generated by the second radiator 05 is towards the top frame 111.

[0178] As shown in Fig. 39 and Fig. 41, in one embodiment, the second radiator 05 further includes a second grounding point 053, which is located between the second feeding point 051 and the second open end 052. In a specific embodiment, a sub-branch can be arranged on the second radiator 05, and the sub-branch is connected with the ground plate to realize the grounding of the second radiator 05. In the present application, the second radiator 05 can be grounded or not grounded. In the embodiment shown in Fig. 43, the second radiator 05 is not grounded.

[0179] Fig. 42 is a schematic diagram of a backside structure of the mobile terminal in the embodiments of the present application. As shown in Fig. 42, in one embodiment, the first side frame 112 includes the fourth slit 1133, and further includes the second grounding point 053. The above-mentioned second radiator 05 is located between the fourth slit 1133 and the second grounding point 053, and the second feeding point 051 is located at one end of the second radiator 05 close to the fourth slit 1133. The second radiator 05 is a 1 / 4 wavelength antenna. In the embodiment shown in Fig. 42, the flow direction of the current generated by the second radiator 05 is towards the top frame 111.

[0180] As shown in FIG. 42, in the embodiment of the present application, the second current can be formed on the second radiator 05, and the second current flows towards the top frame 111. From the back cover side, the current on the second radiator 05 also flows in the clockwise direction. FIG. 43 is a schematic diagram of a back side structure of a mobile terminal in the embodiment of the present application. As shown in FIG. 43, in an embodiment, the second current on the second radiator 05 flows away from the top frame 111. From the back cover side, the second current on the second radiator 05 flows in the counterclockwise direction. In summary, the second current flows in the same direction on the second radiator 05, and a better upper hemisphere radiation pattern can be obtained.

[0181] In the right-hand satellite communication state of the second radiator 05 provided in the embodiment of the present application, the head of the human has little influence on the pattern of the second radiator 05, and the left-hand circular polarization pattern still faces the upper hemisphere direction. In addition, because the normal electric field is generated between the antenna and the head of the human, the left-hand circular polarization radiation can be generated in combination with the original tangential field of the mobile terminal, so that a better left-hand circular polarization pattern can be formed. In summary, the second radiator 05 in the embodiment of the present application can also achieve better right-hand satellite communication.

[0182] FIG. 44 is a comparison diagram of radiation efficiency of the second radiator 05 in free space and in the right-hand satellite communication state in the embodiment of the present application. As shown in FIG. 44, the solid line in the diagram represents the radiation efficiency curve of the second radiator 05 in free space, and the dashed line represents the radiation efficiency curve of the second radiator 05 in the right-hand satellite communication state. It can be seen that the head and the hand of the human have little influence on the radiation efficiency of the second radiator 05 provided in the present application, and the head-hand efficiency decreases very little, and the radiation efficiency of the second radiator 05 can meet the requirements of satellite communication.

[0183] Fig. 45 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in Fig. 45, in an embodiment, the antenna further includes a switch switching circuit 02 and a third radiator 04. The third radiator 04 is located at the top frame 111 of the frame. The third radiator 04 includes a third feeding point 041. The switch switching circuit 02 is connected between the signal source 01 and the second feeding point 051 and the third feeding point 041. The switch switching circuit 02 can be used to electrically connect the signal source 01 with the second feeding point 051 or the third feeding point 041, so that the second radiator 05 is in a working state for satellite communication, or the third radiator 04 is in a working state for satellite communication. When the mobile terminal is in a handheld communication state, the switch switching circuit 02 is used to electrically connect the signal source 01 with the second feeding point 051 or the third feeding point 041, that is, the second radiator 05 or the third radiator 04 is used for satellite communication. The handheld communication state of the mobile terminal means that the user holds the mobile terminal, but the mobile terminal is not used close to the ear, for example, the mobile terminal is in an external state, a public state or a speaker state. In the embodiment of the present application, in addition to using the second radiator 05 for satellite communication, the third radiator 04 can also be used for satellite communication to improve the communication effect of the mobile terminal in the handheld state, and is also conducive to reducing the difficulty of satellite communication of the mobile terminal. In addition to being used for left head satellite communication of the user, the second radiator 05 in the present application can also be used for handheld communication of the user to improve the effect of the handheld communication state and enrich the function of the second radiator 05.

[0184] In some embodiments, the second feeding point 051 and the third feeding point 041 can also be electrically connected with the signal source 01, so that the second radiator 05 and the third radiator 04 are used for satellite communication when the mobile terminal is in a handheld communication state, so as to improve the communication effect of the mobile terminal in the handheld communication state.

[0185] Fig. 46 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in Fig. 46, the present application also provides a mobile terminal. The antenna of the mobile terminal includes a signal source 01, a switch switching circuit 02, a first radiator 03 and a second radiator 05. The first radiator 03 is the first radiator 03 in any of the above embodiments, and the second radiator 05 is the second radiator 05 in any of the above embodiments. Specifically, the shape, electrical connection relationship and performance of the first radiator 03 are all referred to the first radiator 03 in any of the above embodiments, which will not be described herein. Similarly, the shape, electrical connection relationship and performance of the second radiator 05 are all referred to the second radiator 05 in any of the above embodiments, which will not be described herein.

[0186] The signal source 01 of the antenna is also used to provide a radio frequency transmitting signal of a satellite communication frequency band to realize satellite communication of the mobile terminal. The switch switching circuit 02 is connected between the signal source 01 and the first feeding point 031 and the second feeding point 051. Specifically, one end of the switch switching circuit 02 is connected with the signal source 01, and the other end is connected with the first feeding point 031 and the second feeding point 051. It can also be understood that the switch switching circuit 02 is connected between the first feeding point 031 and the signal source 01, and the switch switching circuit 02 is connected between the second feeding point 051 and the signal source 01. Alternatively, it can also be understood that one side of the switch switching circuit 02 is connected with the signal source 01, and the other side is connected with the first feeding point 031 and the second feeding point 051 respectively. The switch switching circuit 02 is used to electrically connect the signal source 01 with the first feeding point 031, or to electrically connect the signal source 01 with the second feeding point 051. When the signal source 01 is electrically connected with the first feeding point 031, the first radiator 03 communicates with the satellite; when the signal source 01 is electrically connected with the second feeding point 051, the second radiator 05 communicates with the satellite.

[0187] In a specific embodiment, the mobile terminal is in a left head hand satellite communication state, and the switch switching circuit 02 is used to electrically connect the first feeding point 031 with the signal source 01, that is, the first radiator 03 is used for left head hand satellite communication. The left head hand satellite communication refers to holding the mobile terminal with the left hand of the user, and pasting the mobile terminal to the left side of the head, and listening to the sound with the left ear to communicate with the communication satellite. When the mobile terminal is in a right head hand satellite communication state, the switch switching circuit 02 is used to electrically connect the second feeding point 051 with the signal source 01, that is, the second radiator 05 is used for right head hand satellite communication. The right head hand satellite communication refers to holding the mobile terminal with the right hand of the user, and pasting the mobile terminal to the right side of the head, and listening to the sound with the right ear to communicate with the communication satellite. The mobile terminal in the embodiment of the application can realize left head hand satellite communication and right head hand satellite communication, and the switch switching circuit 02 can be used to switch the working radiator. When the user left head hand satellite communication, the first radiator 03 communicates with the satellite; when the user right head hand satellite communication, the second radiator 05 communicates with the satellite. The application scene of the mobile terminal in the application is relatively rich.

[0188] Fig. 47 is a schematic view of a back side structure of a mobile terminal according to an embodiment of the present application. As shown in Fig. 47, in a further embodiment, the antenna further includes a third radiator 04, which is located at the top frame 111. The third radiator 04 includes a third feeding point 041. The switch switching circuit 02 is further connected between the signal source 01 and the third feeding point 041, i.e., the switch switching circuit 02 is connected between the signal source 01 and the first feeding point 031, the second feeding point 051 and the third feeding point 041. It can also be understood that the switch switching circuit 02 is connected between the first feeding point 031 and the signal source 01, and the switch switching circuit 02 is connected between the second feeding point 051 and the signal source 01, and the switch switching circuit 02 is connected between the second feeding point 051 and the signal source 01. Alternatively, it can also be understood that one side of the switch switching circuit 02 is connected to the signal source 01, and the other side is connected to the first feeding point 031, the second feeding point 051 and the third feeding point 041, respectively. When the mobile terminal is in a handheld communication state, the switch switching circuit 02 is used to electrically connect the signal source 01 and at least one of the first feeding point 031, the second feeding point 051 and the third feeding point 041. That is, at least one of the first radiator 03, the second radiator 05 and the third radiator 04 can be selected to communicate with the satellite. In the embodiment of the present application, in addition to the first radiator 03 used to realize the left-hand satellite communication of the user, the second radiator 05 used to realize the right-hand satellite communication of the user, the third radiator 04 used to realize the handheld communication of the user, the first radiator 03, the second radiator 05 and the third radiator 04 can be selected to communicate with the satellite in any combination to improve the communication effect of the handheld communication of the mobile terminal, and to facilitate the satellite communication of the mobile terminal.

[0189] For example, in an embodiment, the mobile terminal can be in a handheld communication state, and the switch switching circuit 02 is used to electrically connect the signal source 01 and the first feeding point 031 and the second feeding point 051. That is, the first radiator 03 and the second radiator 05 are used together to realize the handheld communication of the user, so as to enrich the communication function of the mobile terminal.

[0190] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A mobile terminal, characterized in that, The system includes a display screen, a back cover, a frame, and an antenna. The display screen and the back cover are respectively fixed to both sides of the frame, wherein: The frame includes a top frame, a first side frame, and a second side frame, with the top frame located at the top of the mobile terminal; on the back cover side, the first side frame, the top frame, and the second side frame are arranged sequentially in a clockwise direction. The antenna includes a signal source, a switching circuit, a first radiator and a second radiator. The first radiator is an L-shaped radiator, and a portion of the first radiator is located in the top frame and another portion is located in the second side frame. The second radiator is located in either the first side frame or the second side frame. The signal source is used to provide radio frequency transmission signals for satellite communication bands; the first radiator includes a first feed point, the second radiator includes a second feed point, and the switching circuit is connected between the signal source and the first feed point and the second feed point; When the mobile terminal is in left-hand satellite communication mode, the switch switching circuit is used to electrically connect the first feed point and the signal source; when the mobile terminal is in right-hand satellite communication mode, the switch switching circuit is used to electrically connect the second feed point and the signal source.

2. The mobile terminal as described in claim 1, characterized in that, When the mobile terminal is in left-hand satellite communication mode, the first radiator beam has an antenna gain greater than or equal to -8 dBic within the elevation angle range of 25° to 65°; when the mobile terminal is in right-hand satellite communication mode, the first radiator beam has an antenna gain greater than or equal to -8 dBic within the elevation angle range of 25° to 65°.

3. The mobile terminal as described in claim 1 or 2, characterized in that, The top frame includes a first slit, the second side frame includes a second slit, and the first radiator is the portion of the frame located between the first slit and the second slit.

4. The mobile terminal as described in claim 3, characterized in that, The first feed point is located at the end of the first radiator near the first slot, and the end of the first radiator near the second slot is the first open end; or... The first feed point is located at the end of the first radiator near the second slit, and the end of the first radiator near the first slit is the first open end; the first radiator also includes a first grounding point, which is located between the first feed point and the first open end.

5. The mobile terminal as described in any one of claims 1 to 4, characterized in that, The first side frame or the second side frame includes a third slit and a fourth slit, the distance between the third slit and the top frame is less than the distance between the fourth slit and the top frame; the second radiator is located between the third slit and the fourth slit.

6. The mobile terminal as described in any one of claims 1 to 4, characterized in that, The first side frame or the second side frame includes a fourth slit, and the fourth slit has a second grounding point between it and the top frame. The second radiator is located between the fourth slit and the second grounding point.

7. The mobile terminal as described in claim 5 or 6, characterized in that, The distance L1 between the end of the second radiator near the fourth slit and the top frame satisfies: 40mm≤L1≤80mm.

8. The mobile terminal as described in any one of claims 1 to 7, characterized in that, The length L of the second radiator satisfies: 20mm≤L≤40mm.

9. The mobile terminal as described in any one of claims 1 to 8, characterized in that, The antenna further includes a third radiator located in the top frame. The third radiator includes a third feed point. The switching circuit is also connected between the signal source and the third feed point. When the mobile terminal is in a handheld communication state, the switching circuit is used to electrically connect the signal source to at least one of the first feed point, the second feed point, and the third feed point.

10. The mobile terminal according to any one of claims 1 to 8, characterized in that, When the mobile terminal is in handheld communication mode, the switch circuit is used to electrically connect the signal source with the first feed point and the second feed point.

11. A mobile terminal, characterized in that, The system includes a display screen, a back cover, a frame, and an antenna. The display screen and the back cover are respectively fixed to both sides of the frame, wherein: The frame includes a top frame, a first side frame, and a second side frame, with the top frame located at the top of the mobile terminal; on the back cover side, the first side frame, the top frame, and the second side frame are arranged sequentially in a clockwise direction. The antenna includes a signal source and a first radiator, the first radiator being an L-shaped radiator, with a portion of the first radiator located in the top frame and another portion located in the second side frame; The signal source is used to provide radio frequency transmission signals in the satellite communication frequency band; the first radiator includes a first feed point, and the signal source is electrically connected to the first feed point to realize left-hand satellite communication of the mobile terminal.

12. The mobile terminal as described in claim 11, characterized in that, The first side frame includes a first slit, the second side frame includes a second slit, and the first radiator is the portion of the frame located between the first slit and the second slit.

13. The mobile terminal as described in claim 12, characterized in that, The first feed point is located at the end of the first radiator near the first slot, and the end of the first radiator near the second slot is the first open end; or... The first feed point is located at one end of the first radiator near the second slit, and the end of the first radiator near the first slit is the first open end. The first radiator also includes a first grounding point, which is located between the first feed point and the first open end.

14. The mobile terminal as described in any one of claims 11 to 13, characterized in that, The antenna further includes a switching circuit and a third radiator. The third radiator is located in the top frame and includes a third feed point. The switching circuit is connected between the signal source and the first feed point and the third feed point. When the mobile terminal is in a handheld communication state, the switching circuit is used to electrically connect the signal source to at least one of the first feed point and the third feed point.

15. A mobile terminal, characterized in that, The system includes a display screen, a back cover, a frame, and an antenna. The display screen and the back cover are respectively fixed to both sides of the frame, wherein: The frame includes a top frame, a first side frame, and a second side frame, with the top frame located at the top of the mobile terminal; on the back cover side, the first side frame, the top frame, and the second side frame are arranged sequentially in a clockwise direction. The antenna includes a signal source and a second radiator, the second radiator being located in the first side frame or the second side frame; The signal source is used to provide radio frequency transmission signals in the satellite communication frequency band. The second radiator includes a second feed point. When the mobile terminal is in right-hand satellite communication mode, the second feed point is electrically connected to the signal source.

16. The mobile terminal as described in claim 15, characterized in that, The first side frame or the second side frame includes a third slit and a fourth slit arranged in a direction away from the top frame, and the second radiator is located between the third slit and the fourth slit.

17. The mobile terminal as described in claim 15, characterized in that, The first side frame or the second side frame includes a fourth slit, and the fourth slit has a second grounding point between it and the top frame. The second radiator is located between the fourth slit and the second grounding point.

18. The mobile terminal as described in claim 16 or 17, characterized in that, The distance L1 between the end of the second radiator near the fourth slit and the top frame satisfies: 40mm≤L1≤80mm.

19. The mobile terminal as described in any one of claims 15 to 18, characterized in that, The length L of the second radiator satisfies: 20mm≤L≤40mm.

20. The mobile terminal as described in any one of claims 15 to 19, characterized in that, The antenna further includes a switching circuit and a third radiator, the third radiator being located in the top frame and including a third feed point. The switching circuit is connected between the signal source and the second feed point and the third feed point. When the mobile terminal is in a handheld communication state, the switching circuit is used to electrically connect the signal source to at least one of the second feed point and the third feed point.

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