Foldable mobile terminal

Abstract

The present application provides a foldable mobile terminal, comprising a first housing, a second housing, a first rotating shaft, and an antenna system. The first housing and the second housing can be folded or unfolded about the first rotating shaft. The antenna system comprises a first radio frequency chip, a first main radiator and a second main radiator. In a folded state, the orthographic projection of the side edge where the first main radiator is located in a thickness direction of the foldable mobile terminal overlaps the orthographic projection of the side edge where the second main radiator is located in the thickness direction of the foldable mobile terminal. The first main radiator is connected to a first phase shifter, and the second main radiator is connected to a second phase shifter. The first main radiator and the second main radiator of the foldable mobile terminal are both connected to the phase shifters, so that phase shifting may be performed on the basis of different forms of the foldable mobile terminal, and the first main radiator and the second main radiator may work together to improve the communication capability of the foldable mobile terminal provided in the present application.

Description

Foldable mobile terminal

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on March 26, 2024, with application number 202410357365.3 and invention name "Foldable Mobile Terminal", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of electronic devices, and in particular to a foldable mobile terminal. Background Art

[0004] With the rapid development of mobile communication technology and the widespread popularity of smartphones, people's demand for mobile terminals is increasing. Traditional smartphones are powerful enough in terms of functionality, but they have certain limitations in terms of portability and flexibility. To address this problem, foldable mobile terminals have emerged. Foldable mobile terminals include a foldable stand and a flexible screen. The foldable stand drives the flexible screen to unfold and fold. This allows users to unfold the device to obtain a larger screen when needed and fold it away when not needed, reducing the size of the foldable mobile terminal for easier portability.

[0005] However, existing foldable mobile terminals have some issues with their antenna system design. Due to limitations in antenna system layout and connection methods, the antenna radiation efficiency and operating bandwidth of foldable mobile terminal antenna systems need to be further improved to enhance the communication performance and stability of foldable mobile terminals. Summary of the Invention

[0006] The foldable mobile terminal provided in the present application includes an antenna system, and the communication capability of the foldable mobile terminal is enhanced by improving the antenna system.

[0007] In a first aspect, the present application provides a foldable mobile terminal. The foldable mobile terminal includes a first housing, a second housing, a first hinge, and an antenna system. The first housing and the second housing can be folded or unfolded relative to the first hinge, thereby adjusting the display area of ​​the foldable mobile terminal. The antenna system includes a first radio frequency chip, a first main radiator, and a second main radiator. The first main radiator is located on a side of the first housing, the second main radiator is located on a side of the second housing, and the first radio frequency chip is mounted on the first housing and / or the second housing. In the folded state, the orthographic projection of the side of the first main radiator in the thickness direction of the foldable mobile terminal coincides with the orthographic projection of the side of the second main radiator in the thickness direction of the foldable mobile terminal. It is understood that the first main radiator is located on a side of the first housing and is parallel to the side of the second housing. When the foldable mobile terminal is folded, the side of the first main radiator and the side of the second main radiator are located on the same side of the foldable mobile terminal. The first main radiator is connected to a first phase shifter, connected between the first main radiator and the first RF chip, and configured to adjust the phase of the signal fed into the first main radiator. The second main radiator is connected to a second phase shifter, connected between the second main radiator and the first RF chip, and configured to adjust the phase of the signal fed into the second main radiator.

[0008] In the technical solution of this application, both the first and second main radiators of the foldable mobile terminal are connected to phase shifters. This allows the phase of the signal fed into the first and second main radiators to be adjusted according to the different configurations of the foldable mobile terminal. This allows the first and second main radiators to work in coordination, thereby maintaining the antenna system in a desired optimal operating state. For example, this increases the operating bandwidth of the antenna system and provides the antenna system with a better radiation pattern distribution. This improves the communication capabilities of the foldable mobile terminal provided by this application.

[0009] In one technical solution, when the first shell and the second shell are in a folded state, the current distribution on the first main radiator is in the same direction as the current distribution on the second main radiator. Specifically, the first phase shifter adjusts the phase of the signal fed to the first main radiator, and / or the second phase shifter adjusts the phase of the signal fed to the second main radiator, so that the phase of the signal radiated from the first main radiator is in the same direction or in the opposite direction as the phase of the signal radiated from the second main radiator. In short, the feeding scheme of the first main radiator and the second main radiator is equivalent to symmetrical feeding. The first main radiator and the second main radiator operate in the same frequency state, and the first main radiator and the second main radiator work in coordination to improve the working bandwidth of the antenna system. If the first main radiator and the second main radiator operate in different working frequency bands, it is beneficial to improve the working frequency band and radiation efficiency of the antenna system.

[0010] When the first and second shells are folded, the first and second main radiators can be arranged opposite each other or staggered. For example, when the first and second shells are folded, the orthographic projection of the first main radiator along the thickness direction of the foldable mobile terminal at least partially overlaps with the orthographic projection of the second main radiator along the thickness direction of the foldable mobile terminal. The greater the area of ​​overlap between the orthographic projection of the first main radiator along the thickness direction of the foldable mobile terminal and the orthographic projection of the second main radiator along the thickness direction of the foldable mobile terminal, the more conducive it is to the layout of the first and second main radiators, thereby fully utilizing the antenna layout space of the foldable mobile terminal.

[0011] In a specific technical solution, the first housing includes a first side, a second side, and a third side connected in sequence, wherein the first and third sides are respectively perpendicular to the extension direction of the first rotation axis. The second housing includes a fourth side, a fifth side, and a sixth side connected in sequence, wherein the fourth and sixth sides are respectively perpendicular to the extension direction of the first rotation axis. When the first and second housings are folded, the first and fourth sides at least partially overlap, i.e., the first and second sides are located on the same side. In this technical solution, the first main radiator is at least partially located on the first side of the first housing, and the second main radiator is at least partially located on the fourth side of the second housing. In this technical solution, the first main radiator is at least partially located on the side adjacent to the first rotation axis, and the second main radiator is at least partially located on the side also adjacent to the first rotation axis, and the first and second main radiators are located on the same side of the foldable mobile terminal. This solution facilitates excellent performance of the antenna system in all states, including folded, hovering, and flattened.

[0012] Specifically, the first side and the fourth side are both located at the top of the foldable mobile terminal. This solution is beneficial for the foldable mobile terminal to have better communication performance when the user frequently uses the foldable mobile terminal.

[0013] The antenna system is a satellite antenna system, and the antenna system of the foldable mobile terminal is used for communicating with a communication satellite.

[0014] The foldable mobile terminal provided herein can be a two-fold or three-fold mobile terminal. When the foldable mobile terminal is a three-fold mobile terminal, the foldable mobile terminal further includes a second hinge and a third housing. The first housing, first hinge, third housing, second hinge, and second housing are sequentially connected. This means that the first and second housings are located on opposite sides, facilitating signal transmission or reception by the primary radiators located in the first and second housings.

[0015] In a second aspect, the present application also provides a foldable mobile terminal, which includes a first shell, a second shell, a first rotating shaft and an antenna system. The first shell and the second shell can be folded or unfolded relative to the first rotating shaft, thereby adjusting the display area of ​​the foldable mobile terminal. The above-mentioned first shell includes a first side, a second side and a third side connected in sequence, and the first side and the third side are respectively perpendicular to the extension direction of the first rotating shaft. The second shell includes a fourth side, a fifth side and a sixth side connected in sequence, and the fourth side and the sixth side are respectively perpendicular to the extension direction of the first rotating shaft, and the first side and the fourth side are located at the top of the foldable mobile terminal. The above-mentioned antenna system includes a first radio frequency chip and a plurality of radiators, and the plurality of radiators are respectively connected to the first radio frequency chip, and the first radio frequency chip is used to feed the plurality of radiators. The frequency range of the signals transmitted by the plurality of radiators is within 1.7 GHz to 5 GHz. Specifically, the above-mentioned antenna system operates in the medium and high frequency bands. The multiple radiators include a first radiator, a second radiator, a third radiator, a fourth radiator, and a fifth radiator, wherein the first radiator is located on the first side, the second radiator and the third radiator are respectively located on the second side, the fourth radiator is located on the third side, and the fifth radiator is located on the fourth side. Four of the multiple radiators operate at the same frequency, at least one of the four radiators is used to transmit signals simultaneously, and all four radiators are used to receive signals simultaneously. In this solution, the radiators operating at the same frequency in the antenna system implement a 1T4R operating mode, improving the communication efficiency of the antenna system and enhancing the communication capabilities of the foldable mobile terminal.

[0016] In the technical solution of the present application, the foldable mobile terminal can be placed in any posture, and through reasonable distribution, at least four radiators can work simultaneously, so that the antenna system's directional pattern is not prone to blind spots in any posture, thereby improving the communication effect of the foldable mobile terminal.

[0017] In one technical solution, multiple radiators of the antenna system are connected to the same first radio frequency chip, forming a multiple-input multiple-output antenna system, which exponentially improves the capacity and spectrum utilization of the communication system without increasing the bandwidth.

[0018] Regarding the placement of the first RF chip, one technical solution involves mounting the first RF chip in the first housing, and connecting the radiator in the second housing of the antenna system to the first RF chip via a flexible electrical connector. This solution helps reduce the number of RF chips in a foldable mobile terminal and lowers the cost of the foldable mobile terminal.

[0019] Furthermore, a power amplifier is connected between the first RF chip and the radiator located in the second housing. This power amplifier is used to process the signals emitted by the radiator. The provision of the power amplifier can compensate for the high loss between the radiator in the second housing and the first RF chip, thereby improving the performance of the radiator located in the second housing.

[0020] In addition, a low-noise amplifier is connected between the first RF chip and the radiator located in the second housing. The low-noise amplifier is used to process the signal received by the radiator, thereby improving the quality of the signal received by the radiator located in the second housing of the antenna system and improving the working performance of the antenna system.

[0021] In another technical solution, the antenna system includes two first RF chips, one of which is mounted in a first housing and connected to a radiator located in the first housing. The other first RF chip is mounted in a second housing and connected to a radiator located in the second housing. Each radiator is connected to a first RF chip in close proximity, reducing signal transmission path losses and improving the antenna system's communication capabilities.

[0022] The antenna system also includes a control switch connected between the antenna system's radiator and the first RF chip. Furthermore, the control switch can be configured to connect multiple radiators to the first RF chip based on the position of the foldable mobile terminal. The control switch is configured to connect multiple radiators to the first RF chip based on the strength of the signals transmitted by each radiator in the antenna system. This facilitates selecting radiators with stronger transmission signal strength to be in an active state, thereby improving the communication capabilities of the foldable mobile terminal.

[0023] In a third aspect, the present application also provides a foldable mobile terminal. The foldable mobile terminal includes a first shell, a second shell, a first rotating shaft, and an antenna system. The first shell and the second shell can be folded or unfolded relative to the first rotating shaft, thereby adjusting the display area of ​​the foldable mobile terminal. The first shell includes a first side, a second side, and a third side connected in sequence, and the first side and the third side are respectively perpendicular to the extension direction of the first rotating shaft; the second shell includes a fourth side, a fifth side, and a sixth side connected in sequence, and the fourth side and the sixth side are respectively perpendicular to the extension direction of the first rotating shaft, and the first side and the fourth side are located at the top of the foldable mobile terminal. The antenna system includes a first radio frequency chip and multiple radiators, and the multiple radiators are respectively connected to the first radio frequency chip, and the first radio frequency chip is used to feed the multiple radiators. The frequency range of the signals transmitted by the multiple radiators is within 600MHz to 960MHz, that is, the foldable mobile terminal operates in a low-frequency band. The multiple radiators include a sixth radiator, a seventh radiator, an eighth radiator, and a ninth radiator, wherein the sixth radiator is located on the second side, the seventh radiator is located on the third side, the eighth radiator is located on the fifth side, and the ninth radiator is located on the sixth side. Two of the multiple radiators operate at the same frequency, at least one of the two radiators is used to transmit signals, and both radiators are used to receive signals. In this solution, the radiators in the antenna system operating at the same frequency implement a 1T2R operating mode, improving the communication efficiency of the antenna system and enhancing the communication capabilities of the foldable mobile terminal.

[0024] Multiple radiators of the antenna system are connected to the same first radio frequency chip, so that the antenna system becomes a multiple-input multiple-output antenna system, which can multiply the capacity and spectrum utilization of the communication system without increasing the bandwidth.

[0025] When specifically arranging the radiators, the distance between the upper edge of the sixth radiator facing the first side and the first side is shorter than the distance between the sixth radiator and the third side. The distance between the upper edge of the eighth radiator facing the fourth side and the fourth side is shorter than the distance between the eighth radiator and the sixth side. This solution is beneficial for users who are normally using the foldable mobile terminal (holding their hand at the bottom side of the foldable mobile terminal) because their hand is less likely to block the signal, and the foldable mobile terminal has better communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of an unfolded foldable mobile terminal according to an embodiment of the present application;

[0027] FIG2 is a schematic diagram of an unfolded foldable mobile terminal according to an embodiment of the present application;

[0028] FIG3 is a schematic diagram of a folding method of a foldable mobile terminal according to an embodiment of the present application;

[0029] FIG4 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application;

[0030] FIG5 is a schematic structural diagram of an antenna system according to an embodiment of the present application;

[0031] FIG6 is a schematic structural diagram of an antenna system according to an embodiment of the present application;

[0032] FIG7 is a schematic structural diagram of an antenna system according to an embodiment of the present application;

[0033] FIG8 is a schematic structural diagram of an antenna system according to an embodiment of the present application;

[0034] FIG9 is a schematic diagram of a side structure of a foldable mobile terminal according to an embodiment of the present application;

[0035] FIG10 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0036] FIG11 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0037] FIG12 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in a folded state in a comparative example;

[0038] FIG13 is a comparison diagram of the radiation efficiency of the antenna system of the foldable mobile terminal shown in FIG10 and the antenna system of the foldable terminal shown in FIG12;

[0039] FIG14 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0040] FIG15 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0041] FIG16 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0042] FIG17 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0043] FIG18 is a partial structural diagram of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0044] FIG19 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0045] FIG20 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0046] FIG21 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

[0047] FIG22 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a hovering state according to an embodiment of the present application;

[0048] FIG23 is a left-handed polarization pattern of the antenna system of the foldable mobile terminal in a hovering state according to an embodiment of the present application;

[0049] FIG24 is a right-handed polarization pattern of the antenna system of the foldable mobile terminal in a hovering state according to an embodiment of the present application;

[0050] FIG25 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a flattened state according to an embodiment of the present application;

[0051] FIG26 is a directional diagram of an antenna system of a foldable mobile terminal in a flattened state according to an embodiment of the present application;

[0052] FIG27 is a schematic diagram illustrating the operation of an antenna system of a foldable mobile terminal in different states according to an embodiment of the present application;

[0053] FIG28 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in different states according to an embodiment of the present application;

[0054] FIG29 is a schematic diagram showing the operation of an antenna system of a foldable mobile terminal in different states according to an embodiment of the present application;

[0055] FIG30 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application;

[0056] FIG31 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application;

[0057] FIG32 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application;

[0058] FIG33 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application;

[0059] Figures 34a to 34e are schematic diagrams showing the operation of the antenna system of the foldable mobile terminal in different positions;

[0060] FIG35 is a schematic structural diagram of a foldable mobile terminal in an embodiment of the present application.

[0061] Figures: 1-foldable bracket; 11-first housing; 111-first side; 112-second side; 113-third side; 12-second housing; 121-fourth side; 122-fifth side; 123-sixth side; 13-first rotation axis; 14-third housing; 15-second rotation axis; 2-flexible screen; 3-antenna system; 31-first RF chip; 32-first main radiator; 321-first feeding point; 322-first end; 323-second end; 33-second main radiator; 331-second feeding point; 332-third end; 333-fourth end; 34-first phase shifter; 35-second phase shifter; 36-power amplifier; 37-low noise amplifier; 38-first radiator; 39-second radiator; 310 - third radiator; 311 - fourth radiator; 312 - fifth radiator; 313 - tenth radiator;314 - 11th radiator; 315 - 12th radiator; 316 - 6th radiator; 317 - 7th radiator; 318 - 8th radiator; 319 - 9th radiator; 4 - system-on-chip; 5 - sub-branch; Z - thickness direction. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0063] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0064] References in this specification to "one embodiment" or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. The terms "including," "comprising," "having," and their variations all mean "including but not limited to," unless otherwise specifically stated.

[0065] In order to facilitate the understanding of the mobile terminal provided by the embodiment of the present application, its application scenario is first introduced below. Figure 1 is a schematic diagram of the unfolding of the foldable mobile terminal in the embodiment of the present application. As shown in Figure 1, the foldable mobile terminal in the embodiment of the present application may include a foldable bracket 1 and a flexible screen 2. The flexible screen 2 is installed on the foldable bracket 1. The foldable bracket 1 can change the unfolding or folding form of the flexible screen 2 to form a foldable mobile terminal. Under different usage requirements, the foldable mobile terminal can have different display areas, so that the foldable mobile terminal can have a larger display area and at the same time can have better portability.

[0066] Referring to FIG1 , the foldable stand 1 includes a first housing 11, a second housing 12, and a first rotation axis 13. The first housing 11 and the second housing 12 can be folded or unfolded relative to each other via the first rotation axis 13. In the embodiment shown in FIG1 , the foldable mobile terminal is a two-fold mobile terminal. In this embodiment, the first housing 11, the first rotation axis 13, and the second housing 12 of the foldable mobile terminal are sequentially connected. The first rotation axis 13 can move, allowing the first housing 11 and the second housing 12 to be relatively folded or unfolded about the first rotation axis 13, thereby switching the first housing 11 and the second housing 12 between unfolding and folding.

[0067] FIG2 is a schematic diagram of an unfolded foldable mobile terminal according to an embodiment of the present application, and FIG3 is a schematic diagram of a folded foldable mobile terminal according to an embodiment of the present application. As shown in FIG2 and FIG3 , the foldable mobile terminal according to an embodiment of the present application can also be a three-fold mobile terminal, which includes a first housing 11, a first rotation axis 13, a third housing 14, a second rotation axis 15, and a second housing 12. The first housing 11, the first rotation axis 13, the third housing 14, the second rotation axis 15, and the second housing 12 are connected in sequence. In this embodiment, the first housing 11 and the third housing 14 rotate around the first rotation axis 13 to achieve folding or unfolding; the third housing 14 and the second housing 12 rotate around the second rotation axis 15 to achieve folding and unfolding. The first housing 11 and the second housing 12 also have a folding or unfolding relationship based on the first rotation axis 13, the third housing 14, and the second rotation axis 15. Therefore, the first housing 11 and the second housing 12 in the three-fold mobile terminal can also be folded or unfolded relative to each other via the first rotation axis 13. When the foldable mobile terminal is unfolded, the first housing 11, third housing 14, and second housing 12 are arranged in sequence. When the foldable mobile terminal is folded, the first housing 11, third housing 14, and second housing 12 are stacked in sequence. When the foldable mobile terminal is folded, the first housing 11 and second housing 12 are located on opposite sides, making it easier for the primary radiators located in the first and second housings 11, 12 to transmit or receive signals.

[0068] In summary, the foldable mobile terminal in each embodiment of the present application can be a two-fold mobile terminal or a three-fold mobile terminal.

[0069] The above-mentioned first shell 11, second shell 12 and / or third shell 14 can respectively form installation spaces for installing electronic components such as circuit boards, batteries, receivers, speakers, cameras, etc. of electronic equipment. Among them, the circuit board can integrate electronic components such as the main controller, storage unit, antenna module, power management module of the electronic equipment, and the battery can power the flexible screen 2, circuit board, receiver, speaker, camera and other electronic components. In one possible design, at least two shells among the first shell 11, the second shell 12 and the third shell 14 are provided with installation spaces, and the components of the above-mentioned electronic equipment are distributed in each shell. In another possible design, only one shell among the first shell 11, the second shell 12 or the third shell 14 can be provided with an installation space, and the components of the above-mentioned electronic equipment can be concentratedly distributed in the above-mentioned accommodating space.

[0070] The above-mentioned flexible screen 2 can be used to display information and provide an interactive interface for the user. In each embodiment of the present application, the flexible screen 2 can be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MID) display screen, a micro organic light-emitting diode (MID) display screen, a micro organic light-emitting diode (MID) display screen, a quantum dot light-emitting diode (QLED) display screen, etc.

[0071] In one embodiment, assuming the foldable mobile terminal is a two-fold mobile terminal, the flexible screen 2 is fixed to the surface of the foldable stand 1. Specifically, the flexible screen 2 may continuously cover the first housing 11, first hinge 13, and second housing 12 of the foldable stand 1. The first housing 11 and second housing 12 are respectively attached to the first hinge 13. The first housing 11 and second housing 12 are moved closer or farther apart via the first hinge 13 to achieve folding or unfolding of the foldable mobile terminal. When the electronic device is folded, the first housing 11 and second housing 12 of the foldable stand 1 fold toward the flexible screen 2 via the first hinge 13. When the foldable mobile terminal is in the folded state, the flexible screen 2 is located between the first housing 11 and second housing 12. In other words, when the electronic device is folded, the flexible screen 2 is located on the inner surface of the foldable stand 1, forming an inward-folding foldable mobile terminal. Alternatively, when the electronic device is folded, the first housing 11 and second housing 12 of the foldable stand 1 fold away from the flexible screen 2 via the first hinge 13. When the foldable mobile terminal is in the folded state, the flexible screen 2 is located outside the first housing 11 and second housing 12. That is to say, when the electronic device is folded, the flexible screen 2 is located on the outer surface of the foldable bracket 1, forming an outward-folding foldable mobile terminal.

[0072] The first housing 11, the second housing 12, or the third housing 14 includes a frame, which can be formed of a conductive material such as metal or a non-conductive material such as plastic. The frame can be disposed between the display and the back cover and extend circumferentially around the periphery of the foldable mobile terminal. The frame can have four sides surrounding the display to help secure the display.

[0073] In one implementation, a frame primarily comprised of conductive material can be referred to as a conductive frame or metal frame of a foldable mobile terminal, and is suitable for use in an industrial design (ID) with a metallic appearance. In one implementation, the outer surface of the frame is primarily comprised of a conductive material, such as a metal material, thereby creating a metallic frame appearance. In these implementations, the conductive portion of the frame, including the outer surface, can serve as an antenna radiator for the foldable mobile terminal and is generally referred to as a frame antenna.

[0074] In another implementation, the outer surface of the frame is primarily made of a non-conductive material, such as plastic, creating a non-metallic frame appearance suitable for non-metallic IDs. In one implementation, the inner surface of the frame may include a conductive material, such as a metal material. In this implementation, the conductive portion of the inner surface of the frame can serve as the antenna radiator of the foldable mobile terminal. It should be understood that the radiator disposed on the inner surface of the frame (or, in other words, the conductive material on the inner surface) can be placed close to the non-conductive material of the frame to minimize the volume occupied by the radiator and be closer to the exterior of the foldable mobile terminal, achieving better signal transmission. This can also be referred to as a frame antenna. It should be noted that the antenna radiator being placed close to the non-conductive material of the frame means that the antenna radiator can be placed closely to the inner surface of the non-conductive material, embedded within the non-conductive material, or close to the inner surface of the non-conductive material, for example, with a small gap between the antenna radiator and the inner surface of the non-conductive material. It should be understood that both the conductive material and the non-conductive material can be considered part of the frame.

[0075] For example, the foldable mobile terminal may include but is not limited to a mobile phone, a tablet computer, a laptop computer, an e-book reader, a camera, a wearable device, a home electronic device, etc. For ease of understanding, in each embodiment of the present application, the foldable mobile terminal is described using a mobile phone as an example.

[0076] The following explains the terms that may appear in the embodiments of the present application.

[0077] Since the foldable mobile terminal has multiple states during use, for example, the foldable mobile terminal includes a folded state, a hovering state, and a flattened state, for ease of description, the angle between the first housing 11 and the second housing 12 is considered to be a first angle.

[0078] Folded state: can also be called closed state. At this time, the first shell 11 and the second shell 12 of the foldable mobile terminal are completely folded and closed, and the first angle between the first shell 11 and the second shell 12 is 0°. Alternatively, in some embodiments, the first angle between the first shell 11 and the second shell 12 can also be between 0° and 45°.

[0079] Hovering state: refers to a state in which the first shell 11 and the second shell 12 are unfolded to a certain angle but not completely flattened. For example, in the hovering state, the first angle between the first shell 11 and the second shell 12 can be between 45° and 175°.

[0080] Flattened state: refers to the state in which the first shell 11 and the second shell 12 of the foldable mobile terminal are fully unfolded. For example, in the flattened state, the first angle between the first shell 11 and the second shell 12 can be between 175° and 185°, and specifically, the first angle between the first shell 11 and the second shell 12 can be 180°.

[0081] Radiator: A device in an antenna used to receive / send electromagnetic wave radiation. In some cases, the narrow meaning of "antenna" is the radiator, which converts the guided wave energy from the transmitter into radio waves, or converts radio waves into guided wave energy, used to radiate and receive radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, where it is converted into a certain polarized electromagnetic wave energy and radiated in the desired direction. The receiving radiator converts the electromagnetic wave energy of a certain polarization from a specific direction in space into modulated high-frequency current energy and transmits it to the receiver input via the feeder line.

[0082] The RF chip is the combination of all antenna components used for receiving and transmitting RF waves. In the case of a receiving antenna, the RF chip can be considered the antenna section from the first amplifier to the front-end transmitter. In a transmitting antenna, the RF chip can be considered the section after the final 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 transmitting them to the receiver component. Generally, it is considered to be part of the antenna system3, responsible for converting radio waves into electrical signals and vice versa. Antenna design should consider maximum power transmission potential and efficiency. To achieve this, the antenna feed impedance must match 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) must be matched. This matching can be achieved by considering the frequency requirements and the antenna's design parameters such as gain, directivity, and radiation efficiency.

[0083] Communication frequency band / working frequency band: Regardless of the type of antenna, it always operates within a certain frequency range (band width). For example, an antenna that supports the B40 frequency band has an operating frequency band that includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the antenna's operating frequency band includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the antenna's operating frequency band. The width of the operating frequency band is called the operating bandwidth. The operating bandwidth of an omnidirectional antenna may reach 3-5% of the center frequency. The operating bandwidth of a directional antenna may reach 5-10% of the center frequency. The bandwidth can be considered as a frequency range on both sides of the center frequency (for example, the resonant frequency of a dipole), where the antenna characteristics are within the acceptable value range of the center frequency.

[0084] The resonant frequency band and the operating frequency band may be the same or different, or their frequency ranges may partially overlap. In one embodiment, the resonant frequency band of the antenna may cover multiple operating frequency bands of the antenna.

[0085] Phase shifters are located between the radiator and the RF chip, on the connecting line between the radiator and the RF chip. They adjust the phase of the signal fed into the radiator. Specifically, the phase of the signal fed into the radiator can be adjusted by adjusting the electrical length of the connecting line between the radiator and the RF chip.

[0086] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port by the antenna circuit to the antenna port's transmitted power. The smaller the reflected signal, the larger the signal radiated from the antenna into space, and the greater the antenna's radiation efficiency. The larger the reflected signal, the smaller the signal radiated from the antenna into space, and the lower the antenna's radiation efficiency.

[0087] Antenna return loss can be expressed using the S11 parameter, a type of S parameter. S11 represents the reflection coefficient and can characterize the antenna's transmission efficiency.

[0088] In one embodiment, the S11 diagram can be understood as a schematic diagram for representing the resonance generated by the antenna. In one embodiment, the portion of the resonance shown in the S11 diagram that is less than -6dB can be understood as the resonant frequency / frequency range / operating frequency band generated by the antenna. The S11 parameter is usually a negative number. The smaller the S11 parameter, the smaller the antenna return loss and the less energy reflected back by the antenna itself, which means that more energy actually enters the antenna and the higher the antenna's radiation efficiency. The larger the S11 parameter, the greater the antenna return loss and the lower the antenna's radiation efficiency.

[0089] It should be noted that in engineering, an S11 value of -6dB is generally used as a standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna can work normally, or the antenna can be considered to have good transmission efficiency.

[0090] Antenna pattern: Also known as radiation pattern. It is a graph showing how the relative field strength (normalized modulus) of the antenna's radiation field changes with direction at a certain distance from the antenna. It is usually represented by two mutually perpendicular plane patterns passing through the antenna's direction of maximum radiation.

[0091] Antenna patterns typically have multiple radiation beams. The beam with the strongest radiation intensity is called the main lobe, while the remaining beams are called side lobes. Among the side lobes, those in the opposite direction of the main lobe are also called back lobes.

[0092] Radiation efficiency refers to the ratio of the power radiated by an antenna into space (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. Active power input to the antenna = antenna input power - power loss. Power loss primarily includes return loss and metal ohmic loss and / or dielectric loss. Both metal loss and dielectric loss affect radiation efficiency.

[0093] Those skilled in the art will understand that radiation efficiency is generally expressed as a percentage, which has a corresponding conversion relationship with dB. The closer the radiation efficiency is to 0 dB, the better the radiation efficiency of the antenna.

[0094] dB: Decibel, a logarithmic scale with a base of ten. The decibel scale is used only to measure the proportional relationship between one physical quantity and another; it itself has no physical dimension. For every 10-fold increase in the ratio between two quantities, the difference between them is expressed as 10 decibels. For example: A = 100, B = 10, C = 5, and D = 1. Then, A / D = 20dB; B / D = 10dB; C / D = 7dB; and B / C = 3dB. In other words, a 10dB difference between two quantities is a 10-fold difference, a 20dB difference is a 100-fold difference, and so on. A 3dB difference is a 2-fold difference.

[0095] End: The "end" in the terms "first end / second end / third end / fourth end / ground end / open end" of the main radiator should not be narrowly understood as an endpoint or end physically disconnected from other radiators. It can also be considered as a section of the main radiator that includes the first endpoint, where the first endpoint is the endpoint of the main radiator at the gap. For example, the first end of the main radiator can be considered as a section of the main radiator within a range of one-eighth of a first wavelength from the first endpoint. The first wavelength can be the wavelength corresponding to the operating frequency band of the main radiator, the wavelength corresponding to the center frequency of the operating frequency band, or the wavelength corresponding to the resonance point. In one embodiment, an "end / point" can include a connection / coupling region on the radiator that couples to other conductive structures. For example, a feed end / feeding point can be a coupling region on the antenna radiator that couples to the feed structure (e.g., a region facing a portion of the feed structure). For another example, a ground end / grounding point can be a connection / coupling region on the antenna radiator that couples to the ground structure.

[0096] Open end and closed end: In some embodiments, the terms open end and closed end refer to, for example, whether or not they are grounded. A closed end is grounded, while an open end is not. In one embodiment, an open end may also be referred to as a floating end, a free end, an open end, or an open-circuit end. In one embodiment, a closed end may also be referred to as a grounded end or a short-circuit end. It should be understood that in some embodiments, an open end may be coupled to other conductors to transfer coupled energy (which may be understood as transferring current).

[0097] In some embodiments, the open end and the closed end are, for example, relative to other conductors. The closed end is electrically connected to the other conductors, and the open end is not electrically connected to the other conductors.

[0098] To simply understand the "open end" of a radiator, one end of the radiator is spaced apart from the floor or coupled to the floor through a capacitive device, which can be regarded as the open end of the radiator.

[0099] To simply understand the "ground end" of the radiator, one end of the radiator is directly connected to the floor or coupled to the floor through an inductive device, which can be regarded as the ground end of the radiator.

[0100] In some embodiments, the "closed end" can also be understood from the perspective of current distribution. The closed end or the grounded end can be understood as a point with larger current on the radiator, or as a point with smaller electric field on the radiator. In one embodiment, coupling electronic devices (for example, inductive devices, etc.) through the closed end can maintain the current distribution characteristics of the larger current point / small electric field point. In one embodiment, opening a gap at or near the closed end (for example, a gap filled with insulating material) can maintain the current distribution characteristics of the larger current point / small electric field point.

[0101] In some embodiments, the understanding of "open end" can also be viewed from the perspective of current distribution. The open end or floating end can be understood as a point with low current on the radiator, or as a point with high electric field on the radiator. In one embodiment, coupling electronic devices (for example, capacitive devices, etc.) through the open end can maintain the current distribution characteristics of the low current point / high electric field point.

[0102] It should be understood that coupling electronic devices (for example, capacitors, inductors, etc.) to the radiator end at a gap (from the perspective of the radiator structure, it is similar to a radiator at an opening of an open end or a suspended end) can make the radiator end a point with larger current / smaller electric field. In this case, it should be understood that the radiator end at the gap is actually a closed end or a grounded end, etc.

[0103] Capacitance: This can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance includes capacitive components, such as capacitors; distributed capacitance (or distributed capacitance) includes the equivalent capacitance formed by two conductive parts separated by a certain gap.

[0104] FIG4 is a schematic diagram of the structure of a foldable mobile terminal according to an embodiment of the present application, and FIG5 is a schematic diagram of the structure of an antenna system according to an embodiment of the present application. As shown in FIG4 and FIG5 , to implement the communication function of the foldable mobile terminal, the foldable mobile terminal provided by the present application includes an antenna system 3, which includes a first RF chip 31, a first main radiator 32, a second main radiator 33, a first phase shifter 34, and a second phase shifter 35. The first phase shifter 34 is connected to the first main radiator 32 and the first RF chip 31 to enable power feeding of the first main radiator 32, and is used to adjust the phase of the signal fed into the first main radiator 32. Specifically, the first phase shifter 34 is coupled to the first main radiator 32 via a matching circuit. The second phase shifter 35 is connected between the second main radiator 33 and the first RF chip 31 to enable power feeding of the second main radiator 33, and is used to adjust the phase of the signal fed into the second main radiator 33. Specifically, the second phase shifter 35 is coupled to the second main radiator 33 through a matching circuit.

[0105] Please continue to refer to Figure 5. There are multiple options for the arrangement of the first RF chip 31 in the embodiment of the present application. For example, in a specific embodiment, the foldable movable body can include a first RF chip 31, which is installed in the first shell 11. The first main radiator 32 located in the first shell 11 does not need to be connected to the first RF chip 31 across the axis; the second main radiator 33 located in the second shell 12 is connected to the first RF chip 31 across the axis through a flexible electrical connector. For example, the above-mentioned flexible electrical connector can be an electrical connector such as a flexible circuit board, a strip line or a jumper. The above-mentioned "across the axis" refers to the electrical connector crossing the first rotating axis between the first shell 11 and the second shell 12.

[0106] Continuing with reference to FIG5 , in order to improve the signal transmission efficiency between the second main radiator 33 located in the second housing 12 and the first RF chip 31, in one embodiment, a low noise amplifier (LNA) 37 is connected between the first RF chip 31 and the second main radiator 33 located in the second housing 12. The low noise amplifier 37 is connected to the receive port (RX) of the first RF chip 31 and is used to process the signal received by the second main radiator 33. By providing the low noise amplifier 37, the problem of large loss between the second main radiator 33 of the second housing 12 and the first RF chip 31 can be compensated, and the ability of the antenna system 3 to receive signals can be improved, thereby improving the working effect of the antenna system 3. In a specific embodiment, each of the second main radiators 33 of the second housing 12 that radiates signals outward is connected to a power amplifier 36.

[0107] FIG6 is a schematic structural diagram of an antenna system in an embodiment of the present application. As shown in FIG6 , in one embodiment, a power amplifier (PA) 36 is connected between the RF chip and the radiator located in the second housing 12, or the power amplifier 36 and the low-noise amplifier 37 are connected at the same time. The power amplifier 36 is connected to the transmit port (TX) of the first RF chip 31 for processing the signal emitted by the radiator. By providing the power amplifier 36, the problem of large loss between the second main radiator 33 of the second housing 12 and the first RF chip 31 can be compensated, and the ability of the antenna system 3 to transmit signals can be improved, thereby improving the working effect of the antenna system 3. In a specific embodiment, each of the second main radiators 33 of the second housing 12 that receives the radiation signal is connected to a low-noise amplifier 37, and each low-noise amplifier 37 corresponds to a signal transmission channel. For example, the low-noise amplifier 37 connected by the dotted line in FIG6 indicates that if the second housing is provided with another second main radiator 33, the low-noise amplifier 37 is set in the connection mode of the signal transmission channel shown by the dotted line.

[0108] Continuing with FIG6 , in a specific embodiment, a power amplifier 36 and a low-noise amplifier 37 are connected to the second main radiator 33 in the second housing 12, which is used for both transmitting and receiving signals. FIG7 is a schematic structural diagram of the antenna system in an embodiment of the present application. As shown in FIG7 , when specifically laying out the antenna system, the second main radiator 33 in the second housing 12 is connected to a power amplifier 36 and a low-noise amplifier 37. The power amplifier 36 and the low-noise amplifier 37 can then be integrated into a front-end RF module (FEM) to improve the integration of the antenna system 3.

[0109] Figure 8 is a structural diagram of the antenna system in an embodiment of the present application. As shown in Figure 8, in one embodiment, the antenna system 3 of the foldable mobile terminal includes two first RF chips 31, one of which is installed in the first shell 11, and the first RF chip 31 located in the first shell 11 is connected to the radiator located in the first shell 11. The other first RF chip 31 is installed in the second shell 12, and the first RF chip 31 located in the second shell 12 is connected to the radiator located in the second shell 12. In a specific embodiment, the two first RF chips 31 of the above-mentioned antenna system 3 are respectively connected to the system-level chip 4 to work together. In this embodiment, each radiator is connected to a first RF chip 31 that is relatively close, which can reduce the loss of the signal transmission path and enhance the communication capability of the antenna system 3.

[0110] In a specific embodiment, the two first RF chips 31 may have a variety of configuration options. For example, the first RF chip 31 located in the first housing 11 may support 2T4R communication, and the first RF chip 31 located in the second housing 12 may support 1T2R communication. Alternatively, the first RF chip 31 located in the first housing 11 may support 1T4R communication, and the first RF chip 31 located in the second housing 12 may support 1T4R communication. Alternatively, the first RF chip 31 located in the first housing 11 may support 1T4R communication, and the first RF chip 31 located in the second housing 12 may support 1T2R communication. Alternatively, the first RF chip 31 located in the first housing 11 may support 1T2R communication, and the first RF chip 31 located in the second housing 12 may support 1T2R communication.

[0111] It should be noted that in this application, "xTyR" represents x radiators connected to the RF chip of the antenna system used for signal transmission, and "yR" represents y radiators connected to the RF chip of the antenna system used for signal reception. x and y are positive integers.

[0112] In an optional embodiment, the above-mentioned first RF chip 31 may be a cellular chip, or the above-mentioned first RF chip 31 may also be a satellite RF chip. In short, the antenna system 3 in the technical solution provided in this application can be used to implement both cellular communication and satellite communication. When the above-mentioned first RF chip 31 is a satellite RF chip, the antenna system 3 of the foldable mobile terminal is a satellite antenna system 3, which is used to communicate with a communication satellite. Satellite communication includes: receiving and / or sending short messages (also known as short messages), making and / or answering calls, and data services (such as surfing the Internet). At least one communication service.

[0113] Figure 9 is a schematic diagram of a lateral structure of a foldable mobile terminal according to an embodiment of the present application. Referring to Figures 4 and 9, the first main radiator 32 is located on a side of the first housing 11, and the second main radiator 33 is located on a side of the second housing 12. In the folded state, the orthographic projection of the side of the first main radiator 32 in the thickness direction Z of the foldable mobile terminal coincides with the orthographic projection of the side of the second main radiator 33 in the thickness direction Z of the foldable mobile terminal. It will be understood that the first main radiator 32 is located on a side of the first housing 11 and is parallel to the side of the second housing 12. Furthermore, when the foldable mobile terminal is folded, the side of the first main radiator 32 and the side of the second main radiator 33 are located on the same side of the foldable mobile terminal.

[0114] In the technical solution of the present application, in one embodiment, when the first main radiator 32 and the second main radiator 33 of the foldable mobile terminal are used as transmitting antennas, they can share the same transmitting RF channel and function as a single transmitting antenna. In another embodiment, when the first main radiator 32 and the second main radiator 33 are used as receiving antennas, they can share the same receiving RF channel and function as a single receiving antenna. For ease of understanding, the first main radiator 32 and the second main radiator 33 that share the same RF channel and operate simultaneously can be considered to form an antenna array. In one embodiment, the first main radiator 32 and the second main radiator 33 of the foldable mobile terminal are both connected to phase shifters, so that the phase of the signal fed into the first main radiator 32 and the phase of the signal fed into the second main radiator 33 can be adjusted according to the different forms of the foldable mobile terminal, so that the first main radiator 32 and the second main radiator 33 work in coordination, thereby putting the antenna system 3 in the required better working state, for example, increasing the working bandwidth of the antenna system 3 and making the antenna system 3 have a better radiation pattern distribution. This improves the communication capability of the foldable mobile terminal provided by the present application.

[0115] In one embodiment, the frequency range of the signal transmitted by the antenna system 3 of the foldable mobile terminal is within 1.7 GHz to 5 GHz, which can be understood as the antenna system 3 operating in the medium and high frequency bands.

[0116] FIG10 is a schematic diagram illustrating the operation of an antenna system for a foldable mobile terminal in a folded state according to an embodiment of the present application. As shown in FIG9 and FIG10 , in one embodiment, when the first housing 11 and the second housing 12 are in the folded state, the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are adjusted by adjusting the phase of the signal fed to the first main radiator 32 and the phase of the signal fed to the second main radiator 33. For example, in a specific embodiment, the phase of the signal fed to the first main radiator 32 is adjusted by a first phase shifter 34, and / or the phase of the signal fed to the second main radiator 33 is adjusted by a second phase shifter 35, so that the phase of the signal radiated from the first main radiator 32 is in the same direction or in the opposite direction as the phase of the signal radiated from the second main radiator 33. In one embodiment, the feeding scheme for the first main radiator 32 and the second main radiator 33 can be considered equivalent to symmetrical feeding. Specifically, whether the signal phases on the two main radiators are the same or in opposite directions is related to the positions of the feeding points of the two main radiators. For example, in the embodiment shown in FIG10 , the first feeding point 321 of the first main radiator 32 is aligned with the first main radiator 32 in the same direction as the second feeding point 331 of the second main radiator 33. In a specific embodiment, the first feeding point 321 is located at the end of the first main radiator 32 away from the first rotation axis 13, and the second feeding point 331 is also located at the end of the second main radiator 33 away from the first rotation axis 13. During actual operation of the antenna system 3, the phase of the signal radiated from the first main radiator 32 and the phase of the signal radiated from the second main radiator 33 can be adjusted to be in the same direction, thereby aligning the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33. Alternatively, FIG11 is a schematic diagram illustrating the operation of an antenna system for a foldable mobile terminal in a folded state according to an embodiment of the present application. In the embodiment shown in FIG11 , the first feeding point 321 of the first main radiator 32 is aligned with the first main radiator 32 in the opposite direction as the second feeding point 331 of the second main radiator 33. In a specific embodiment, the first feeding point 321 is located at an end of the first main radiator 32 away from the first rotation axis 13, and the second feeding point 331 is also located at an end of the second main radiator 33 closer to the first rotation axis 13. Therefore, during actual operation of the antenna system 3, the phase of the signal radiated from the first main radiator 32 and the phase of the signal radiated from the second main radiator 33 can be adjusted to be opposite, so that the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are in the same direction.

[0117] In one working state, the first main radiator 32 and the second main radiator 33 in the antenna system 3 of the foldable mobile terminal work in the same frequency state, and the first main radiator 32 and the second main radiator 33 work together to improve the working bandwidth of the antenna system 3.

[0118] The current distribution on the first main radiator and the second main radiator 33 mentioned in the embodiment of the present application is in the same direction / opposite direction, which should be understood as the direction of the main current on the first main radiator and the main current on the second main radiator being the same / opposite. The main current on the radiator can be understood as the main current of the radiator at the center frequency of its operating frequency band. It should also be understood that the first main radiator and the second main radiator in the embodiment of the present application are both main radiators extending linearly, and the above-mentioned main current refers to the current flowing from one end to the other end of the main radiator.

[0119] FIG12 is a schematic diagram illustrating the operation of an antenna system for a foldable mobile terminal in a folded state, according to a comparative example. The comparative example shown in FIG12 differs from the antenna system 3 for a foldable mobile terminal in the embodiment shown in FIG10 in that, of the first and second main radiators 32 and 33, only the second main radiator 33 includes a feed point. The second main radiator 33 serves as the primary feed radiator, while the first main radiator 32 serves as a parasitic radiator. In the comparative example shown in FIG12 , each main radiator includes two currents, resulting in two sets of current distributions for the entire antenna system 3. One set of current distributions, shown by the dashed lines in the figure, has a stronger current generated by the second main radiator 33 and a weaker current generated by the first main radiator 32, resulting in uneven energy distribution between the first and second main radiators 32 and 33. Furthermore, the other set of current distributions, shown by the solid lines in the figure, has a current distribution direction opposite to that of the second main radiator 33. Consequently, the energy of the first main radiator 32 weakens the energy of the second main radiator 33. Furthermore, as the operating frequency band increases, energy will be confined between the first shell 11 and the second shell 12 and will be difficult to radiate to the outside space. Therefore, the bandwidth of the antenna system 3 in the comparative example is also difficult to increase.

[0120] FIG13 is a comparative diagram of the radiation efficiency of the antenna system of the foldable mobile terminal shown in FIG10 and the antenna system of the foldable mobile terminal shown in FIG12 . As shown in FIG13 , the dotted line shows the radiation efficiency curve of the antenna system 3 in the comparative example shown in FIG12 , and the actual line shows the radiation efficiency curve of the antenna system 3 of the foldable mobile terminal provided by the present application. As shown in FIG13 , the antenna system 3 in the comparative example shown in FIG12 generates a radiation efficiency pit, while the antenna system 3 of the foldable mobile terminal of the present application has good radiation efficiency within a wider operating bandwidth. Specifically, the antenna system 3 of the foldable mobile terminal of the present application also has high radiation efficiency within the frequency band where the antenna system 3 in the comparative example has a radiation efficiency pit. It can be seen that the antenna system 3 of the foldable mobile terminal of the present application has a wider operating bandwidth.

[0121] In one operating state, the first main radiator 32 and the second main radiator 33 in the antenna system 3 of the foldable mobile terminal operate in different operating frequency bands. In this case, the first main radiator 32 operates in a first frequency band, and the second main radiator 33 operates in a second frequency band. The first and second frequency bands are different, but may partially overlap. The first phase shifter 34 adjusts the phase of the signal fed into the first main radiator 32, and / or the second phase shifter 35 adjusts the phase of the signal fed into the second main radiator 33, so that the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are in the same direction. This helps to improve the operating frequency band and radiation efficiency of the antenna system 3. For example, the first main radiator 32 operates at B3 and B1, and the second main radiator 33 operates at B7, so that the operating frequency band of the antenna system 3 can include B3+B1+B7. Among them, B1 stands for band 1, referring to the operating frequency band of 1920MHz to 2170MHz; B3 stands for band 3, referring to the operating frequency band of 1710MHz to 1880MHz; B7 stands for band 7, referring to the operating frequency band of 2500MHz to 2690MHz.

[0122] The specific structures of the first main radiator 32 and the second main radiator 33 in the embodiments of the present application have various options. For example, the first main radiator 32 in the present application may have two ends, including a first end 322 and a second end 323. As shown in FIG10 , in one embodiment, the first end 322 of the first main radiator 32 is open, with the first feeding point 321 located at the first end 322, while the second end 323 is grounded. In one embodiment, a slit is provided in the middle of the first main radiator 32, so that the first main radiator 32 is formed from two branches. In one embodiment, capacitors are provided at both ends of the slit in the first main radiator 32. In one embodiment, the first main radiator 32 may be implemented as a conductive portion of a frame, with the first end 322 of the first main radiator 32 being slit-free, while the second end 323 may not be slit-free. In one embodiment, the first end 322 and the second end 323 of the first main radiator 32 are each provided with a slit. As shown in FIG11 , the first feeding point 321 is located at the second end 323, and the first end 322 is grounded, forming a grounded end. Figure 14 is a schematic diagram of the operation of an antenna system when the foldable mobile terminal is in a folded state in an embodiment of the present application. As shown in Figure 14, in one embodiment, the first end 322 of the first main radiator 32 is an open end, the second end 323 is grounded as a ground end, and there is no gap in the middle of the first main radiator 32.

[0123] Similarly, the second main radiator 33 includes a third end 332 and a fourth end 333 at both ends, as shown in FIG10 . In one embodiment, the third end 332 of the second main radiator 33 is open, and the second feeding point 331 is located at the third end 332. The fourth end 333 is grounded to form a ground terminal. In one embodiment, a slit is provided in the middle of the second main radiator 33, so that the second main radiator 33 is formed from two branches. In one embodiment, capacitors are provided at both ends of the slit in the second main radiator 33. In one embodiment, the second main radiator 33 can be implemented by a conductive portion of the frame, while the first end 322 of the first main radiator 32 is implemented by a slit, and the second end 323 can be left unslit. In one embodiment, the third end 332 and the fourth end 333 of the second main radiator 33 are each slit, as shown in FIG11 . The second feeding point 331 is located at the fourth end 333, and the third end 332 is grounded to form a ground terminal. As shown in FIG. 14 , in one embodiment, the third end 332 of the second main radiator 33 is an open end, the fourth end 333 is a ground end, and there is no gap in the middle of the second main radiator 33 .

[0124] In the embodiments of the present application, the first main radiator 32 and the second main radiator 33 may be the same or different, and this application does not impose any restrictions on this. As shown in Figure 14, in one embodiment, the first main radiator 32 and the second main radiator 33 are the same. Figure 15 is a schematic diagram of an antenna system operating in a folded state of a foldable mobile terminal in an embodiment of the present application. As shown in Figure 15, in one embodiment, the first main radiator 32 and the second main radiator 33 are different.

[0125] There is no limitation on the way in which the capacitor is formed in the embodiment of the present application. For example, the capacitor may be a lumped capacitor and / or a distributed capacitor. As shown in FIG15 , in one embodiment, a sub-branch 5 may be provided next to the main radiator, and the sub-branch 5 may be coupled with the branch of the main radiator to form a capacitor. In FIG15 , taking the sub-branch 5 provided at the slit in the middle of the first main radiator 32 as an example, as shown in FIG15 , in one embodiment, the sub-branch 5 may be connected to the first main radiator 32, and the sub-branch 5 is used to form the capacitor of the first main radiator 32, so that the sub-branch 5 may be connected to the first main radiator 32. FIG16 is a schematic diagram of the operation of an antenna system in a foldable mobile terminal in a folded state in an embodiment of the present application. As shown in FIG16 , in one embodiment, the sub-branch 5 may be spaced a certain coupling distance from the main radiator without an actual physical connection relationship. In FIG15 and FIG16 , a sub-branch 5 is used as an example to illustrate the formation of an equivalent capacitor. Alternatively, in one embodiment, an equivalent capacitor may be formed by interlaced coupling of multiple sub-branch nodes.

[0126] FIG17 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application. As shown in FIG17 , in one embodiment, the first main radiator 32 may include two radiators, and the two radiators are fed separately, but the two radiators are connected in series via an electrical device. In a specific embodiment, the above-mentioned electrical device may be a capacitor. When the above-mentioned electrical device is specifically set, the electrical device may be set on a structure such as a printed circuit board or a flexible circuit board. Similarly, the above-mentioned second main radiator 33 may also include two radiators, and the two end radiators are fed separately, but the two radiators are connected in series via an electrical device. In a specific embodiment, the above-mentioned electrical device may be a capacitor.

[0127] It is worth noting that in the embodiment of the present application, when a slot is formed in the middle of the main radiator, or when a slot is formed between the end of the main radiator and the adjacent metal structure, the slot can also form an equivalent capacitor without the need for additional branches or devices.

[0128] When the first housing 11 and the second housing 12 are in the folded state, the first main radiator 32 and the second main radiator 33 can be arranged opposite each other or staggered. For example, in the embodiments shown in Figures 10 and 11, the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal at least partially overlaps with the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal. Specifically, as shown in Figures 10 and 11, in one embodiment, the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal completely overlaps with the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal. Figure 18 is a schematic diagram of a partial structure of an antenna system for a foldable mobile terminal in the folded state according to an embodiment of the present application. As shown in Figure 18, in one embodiment, the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal partially overlaps with the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal, and partially staggers. FIG19 is a schematic diagram of a partial structure of an antenna system for a foldable mobile terminal in a folded state according to an embodiment of the present application. As shown in FIG19 , in one embodiment, the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal partially overlaps with the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal. Specifically, the length of the second main radiator 33 is less than the length of the first main radiator 32, and the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal is completely within the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal. FIG20 is a schematic diagram of a partial structure of an antenna system for a foldable mobile terminal in a folded state according to an embodiment of the present application. As shown in FIG20 , in one embodiment, the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal does not overlap with the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal. When the first housing 11 and the second housing 12 are in the folded state, the staggered arrangement of the first main radiator 32 and the second main radiator 33 can also enable the first main radiator 32 and the second main radiator 33 to work in coordination. In the embodiment of the present application, when the first housing 11 and the second housing 12 are in the folded state, the larger the area of ​​overlap between the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal and the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal, the more conducive it is to the layout of the first main radiator 32 and the second main radiator 33, thereby fully utilizing the antenna layout space of the foldable mobile terminal.

[0129] Figure 21 is a schematic diagram of a partial structure of an antenna system for a foldable mobile terminal in a folded state according to an embodiment of the present application. As shown in Figures 10, 11, and 21, the first main radiator 32 and the second main radiator 33 each have a central slit. When the foldable mobile terminal is folded, the central slit of the first main radiator 32 can be aligned with the central slit of the second main radiator 33. In one embodiment, the first and second main radiators 32, 33 can be implemented by conductive portions of a frame. In a possible implementation, the slits are visible on the outer cross-section of the foldable mobile terminal, which helps improve the regularity and aesthetics of the foldable mobile terminal's appearance. In a specific embodiment, as shown in Figures 10 and 11, the first end 322 of the first main radiator 32 and the third end 332 of the second main radiator 33 are aligned, and the second end 323 of the first main radiator 32 and the fourth end 333 of the second main radiator 33 are aligned. In a specific embodiment, as shown in FIG21 , the first end 322 of the first main radiator 32 and the third end 332 of the second main radiator 33 are not aligned, but the second end 323 of the first main radiator 32 and the fourth end 333 of the second main radiator 33 are aligned. As shown in FIG18 , in an embodiment, the first main radiator 32 has a central slit, and the central slit of the first main radiator 32 is aligned with the third end 332 of the second main radiator 33. As shown in FIG19 , in an embodiment, the second main radiator 33 has a central slit, and the central slit of the second main radiator 33 is aligned with the first end 322 of the first main radiator 32, and the fourth end 333 of the second main radiator 33 is aligned with the second end 323 of the first main radiator 32. As shown in FIG20 , in an embodiment, the second end 323 of the first main radiator 32 is aligned with the third end 332 of the second main radiator 33.

[0130] FIG22 is a schematic diagram of a partial structure of the antenna system of the foldable mobile terminal in the hovering state in an embodiment of the present application. As shown in FIG22 , in one embodiment, the first shell 11 and the second shell 12 are in the hovering state. By adjusting the signal phase fed into the first main radiator 32 and the signal phase fed into the second main radiator 33, the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are adjusted. The circular polarization of the antenna system 3 is enhanced and the directional pattern characteristics are adjusted. In a specific embodiment, the first shell 11 and the second shell 12 are unfolded to a first angle, and the first angle is between 45° and 135°, so that the user can use the foldable mobile terminal when the foldable mobile terminal is in the hovering state.

[0131] FIG23 illustrates a left-handed polarization pattern of the antenna system for a foldable mobile terminal in a hovering state according to an embodiment of the present application. Specifically, FIG23 illustrates the left-handed polarization pattern presented by the antenna system 3 when the first main radiator 32 and the second main radiator 33 of the antenna system 3 have different phase differences. FIG24 illustrates a right-handed polarization pattern of the antenna system for a foldable mobile terminal in a hovering state according to an embodiment of the present application. Specifically, FIG24 illustrates the right-handed polarization pattern presented by the antenna system 3 when the first main radiator 32 and the second main radiator 33 of the antenna system 3 have different phase differences. Referring to FIG23 and FIG24, in an embodiment of the present application, the left-handed polarization direction and the right-handed polarization direction of the antenna system 3 can be adjusted by adjusting the phase of the signal fed into the first main radiator 32 by the first phase shifter 34 and adjusting the phase of the signal fed into the second main radiator 33 by the second phase shifter 35, thereby improving the communication performance of the antenna system 3. For example, the antenna system 3 is a satellite antenna system 3 used to communicate with a satellite communication system. The antenna system 3 in the embodiment of this solution can adjust the left-hand polarization direction and the right-hand polarization direction of the antenna system 3 so that the maximum radiation direction in the left-hand planned direction and the maximum radiation direction in the right-hand polarization direction are directed towards the zenith direction, so as to facilitate communication with satellites in the sky. As shown in Figure 23, the left-hand polarization direction of the antenna system 3 can cover the range of -80° to -175° at -4dBiC; as shown in Figure 24, the right-hand polarization direction of the antenna system 3 can cover the range of -5° to -263° at -4dBiC. Specifically, the present application adjusts the directional patterns of the first main radiator 32 and the second main radiator 33 in the left-hand direction and the right-hand direction by phase adjustment, and can improve the left-hand directional pattern or improve the right-hand directional pattern according to needs, or take into account both the left-hand directional pattern and the right-hand directional pattern, so that the foldable mobile terminal can have good communication effects in different satellite scenarios.

[0132] In a specific embodiment, the first angle between the first shell 11 and the second shell 12 is between 85° and 100°. In this embodiment, the current distribution direction on the first main radiator 32 and the current distribution direction on the second main radiator 33 are substantially orthogonal, which further enhances the circular polarization strength of the antenna system 3.

[0133] FIG25 is a partial structural diagram of an antenna system of a foldable mobile terminal in a flattened state according to an embodiment of the present application. As shown in FIG25 , in one embodiment, the first shell 11 and the second shell 12 are in a flattened state. By adjusting the signal phase fed into the first main radiator 32 and the signal phase fed into the second main radiator 33, the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are made to be in the same direction. This enables the antenna system 3 to achieve narrow beam scanning. In a specific embodiment, the first shell 11 and the second shell 12 are unfolded to a first angle, and the first angle is between 175° and 185°, so that the user can use the foldable mobile terminal in a flattened state. In a specific embodiment, when the first shell 11 and the second shell 12 are in a flattened state, the first angle can be 180°, which is conducive to making the display screen of the foldable mobile terminal relatively flat.

[0134] Figure 26 illustrates a directional pattern of an antenna system for a foldable mobile terminal in a flattened state according to an embodiment of the present application. Specifically, Figure 26 shows the directional patterns of antenna system 3 under different phase differences between the first main radiator 32 and the second main radiator 33 of antenna system 3. In this embodiment of the present application, the directional pattern of antenna system 3 is adjusted by adjusting the phase of the signal fed into the first main radiator 32 through the first phase shifter 34 and adjusting the phase of the signal fed into the second main radiator 33 through the second phase shifter 35, thereby adjusting the directional pattern of antenna system 3 to obtain a more optimal directional pattern, thereby improving the communication performance of antenna system 3.

[0135] Figure 27 is a schematic diagram of the antenna system operating in different states of a foldable mobile terminal according to an embodiment of the present application, and Figure 28 is a schematic diagram of the antenna system operating in different states of a foldable mobile terminal according to an embodiment of the present application. As shown in Figures 27 and 28, in one embodiment, the first housing 11 includes a first side 111, a second side 112, and a third side 113 connected in sequence. The first side 111 and the third side 113 are respectively perpendicular to the extension direction of the first rotation axis 13, and the second side 112 can be parallel to the extension direction of the first rotation axis 13. The second housing 12 includes a fourth side 121, a fifth side 122, and a sixth side 123 connected in sequence. The fourth side 121 and the sixth side 123 are respectively perpendicular to the extension direction of the first rotation axis 13, and the fifth side 122 can be parallel to the extension direction of the first rotation axis 13. The first main radiator 32 is at least partially located on the first side 111 of the first housing 11, and the second main radiator 33 is at least partially located on the fourth side 121 of the second housing 12. The first side 111 and the fourth side 121 are located on the same side of the foldable mobile terminal. In one embodiment, the first side 111 and the fourth side 121 are connected by a first hinge 13. When the first and second housings 11 and 12 are folded, the first side 111 and the fourth side 121 at least partially overlap. When the foldable mobile terminal is unfolded, the first and second main radiators 32 and 33 extend in a straight line. When the foldable mobile terminal is folded, the first and second main radiators 32 and 33 operate in a coupled manner, specifically, such that the first and second main radiators 32 and 33 at least partially overlap. At least a portion of the first main radiator 32 is located on a side adjacent to the first rotation axis 13, and at least a portion of the second main radiator 33 is also located on a side adjacent to the first rotation axis 13. Furthermore, the first and second main radiators 32, 33 are located on the same side of the foldable mobile terminal. This solution facilitates good performance of the antenna system 3 in all states: folded, hovering, and flattened.

[0136] As shown in FIG27 , the foldable mobile terminal in the embodiment of the present application may be a large foldable mobile terminal, wherein the length of the second side 112 of the foldable mobile terminal is greater than the lengths of the first side 111 and the third side 113. In this embodiment, the first side 111 and the fourth side 121 are both located at the top of the foldable mobile terminal, and the top is the top when the user is using the foldable mobile terminal under normal circumstances and the application icon is facing upward. In one embodiment, the top may refer to the direction of the earpiece of the foldable mobile terminal, and the direction of the microphone is the bottom of the foldable mobile terminal. This solution is conducive to the foldable mobile terminal having better communication performance when the user uses the foldable mobile terminal more frequently.

[0137] As shown in FIG28 , the foldable mobile terminal in the embodiment of the present application can be a small foldable mobile terminal, in which the sum of the lengths of the first side 111 and the fourth side 121 of the foldable mobile terminal is greater than the length of the second side 112. The first rotating shaft 13 extends in the horizontal direction, and the second side 112 is located at the top of the foldable mobile terminal.

[0138] In the embodiment of the present application, the first main radiator 32 is at least partially located on the first side 111 of the first housing 11, and the second main radiator 33 is at least partially located on the fourth side 121 of the second housing 12. In one specific implementation, the distance between the first main radiator 32 and the first rotation axis 13 can be smaller than the distance between the first main radiator 32 and the second side 112. That is, the first main radiator 32 is located on the side of the first side 111 closer to the first rotation axis 13. Specifically, the distance between the first main radiator 32 and the first rotation axis 13 refers to the distance between the edge of the first main radiator 32 facing the first rotation axis 13 and the axis of the first rotation axis 13; the distance between the first and second sides 112 refers to the distance between the second main radiator 33 facing the second side 112 and the second side 112.

[0139] In a further implementation, the ground of the first main radiator 32 is connected to the first rotating shaft 13 , and the ground of the second main radiator 33 is also connected to the first rotating shaft 13 , thereby achieving a common ground for the first main radiator 32 and the second main radiator 33 .

[0140] Figure 29 is a schematic diagram illustrating the operation of the antenna system of a foldable mobile terminal in different states according to an embodiment of the present application. As shown in Figure 29, in some embodiments, the first main radiator 32 can be at least partially located on the second side 112 of the first housing 11, and the second main radiator 33 can be at least partially located on the fifth side 122 of the second housing 12, which is also a possible implementation of the present application. In this embodiment, when the foldable mobile terminal is in the unfolded state, the first main radiator 32 and the second main radiator 33 are spaced apart; when the foldable mobile terminal is in the folded state, the first main radiator 32 and the second main radiator 33 are close together.

[0141] Figure 30 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application. As shown in Figure 30, the present application also provides a foldable mobile terminal having a first housing 11 comprising a first side 111, a second side 112, and a third side 113 connected in sequence. The first side 111 and the third side 113 are respectively perpendicular to the extension direction of the first rotation axis 13. The second housing 12 comprises a fourth side 121, a fifth side 122, and a sixth side 123 connected in sequence. The fourth side 121 and the sixth side 123 are respectively perpendicular to the extension direction of the first rotation axis 13. The first side 111 and the fourth side 121 are located at the top of the foldable mobile terminal. The top is the top when the user is normally using the foldable mobile terminal, with the application icons facing upward. In one embodiment, the top may refer to the direction of the earpiece of the foldable mobile terminal, while the direction of the microphone is the bottom of the foldable mobile terminal. The antenna system 3 includes a first RF chip 31 and multiple radiators, which are connected to the first RF chip 31. Specifically, each radiator has a feeding point, and the feeding point of the radiator is connected to the first RF chip 31. The first RF chip 31 is used to feed the multiple radiators separately, thereby realizing the communication function of the radiator. The frequency range of the transmission signal of the multiple radiators in the embodiment of the present application is within 1.7GHz~5GHz. Specifically, the antenna system 3 operates in the medium and high frequency bands. The multiple radiators include a first radiator 38, a second radiator 39, a third radiator 310, a fourth radiator 311 and a fifth radiator 312, wherein the first radiator 38 is located on the first side 111, the second radiator 39 and the third radiator 310 are respectively located on the second side 112, the fourth radiator 311 is located on the third side 113, and the fifth radiator 312 is located on the fourth side 121.

[0142] In this embodiment, the antenna system 3 in the foldable mobile terminal includes at least five radiators, and the operating states of multiple radiators in the antenna system 3 can be selected as needed. In one embodiment, four of the multiple radiators in the antenna system 3 operate at the same frequency. Among the four radiators operating at the same frequency, at least one radiator is used to transmit signals simultaneously, and all four radiators are used to receive signals simultaneously. In this solution, the radiators in the antenna system 3 operating at the same frequency implement a 1T4R operating mode, improving the communication efficiency of the antenna system 3 and enhancing the communication capabilities of the foldable mobile terminal.

[0143] In the technical solution of the present application, the foldable mobile terminal can be in any posture, and through reasonable distribution, at least four radiators can work simultaneously, so that the directional pattern of the antenna system 3 is not prone to blind spots in any posture, thereby improving the communication effect of the foldable mobile terminal.

[0144] FIG31 is a schematic diagram of a structure of a foldable mobile terminal according to an embodiment of the present application. As shown in FIG31 , in one embodiment, the antenna system 3 of the foldable mobile terminal may further include a tenth radiator 313, so that the antenna system 3 includes at least six radiators, and the tenth main radiator is located on the fifth side 122. FIG32 is a schematic diagram of a structure of a foldable mobile terminal according to an embodiment of the present application. As shown in FIG32 , in one embodiment, the antenna system 3 of the foldable mobile terminal may further include a tenth radiator 313 and an eleventh radiator 314, so that the antenna system 3 includes at least seven radiators, and the tenth radiator 313 and the eleventh radiator 314 are respectively located on the fifth side 122. Figure 33 is a structural schematic diagram of a foldable mobile terminal in an embodiment of the present application. As shown in Figure 33, in one embodiment, the antenna system 3 of the foldable mobile terminal may further include a tenth radiator 313, an eleventh radiator 314 and a twelfth radiator 315, so that the antenna system 3 includes at least eight radiators, and the tenth radiator 313 and the eleventh radiator 314 are respectively located at the above-mentioned fifth side 122, and the twelfth radiator 315 is located at the sixth side 123.

[0145] Figures 34a through 34e are schematic diagrams illustrating the operation of the antenna system of a foldable mobile terminal in different positions. Figures 34a through 34e illustrate the operation of antenna system 3 in different positions, using the example of an antenna system 3 of a foldable mobile terminal comprising eight radiators. The radiators within the solid-line boxes in the figures are active, while the radiators within the dashed-line boxes are inactive. As shown in Figures 34a through 34e, in an embodiment of the present application, antenna system 3 of a foldable mobile terminal comprises multiple radiators. When the foldable mobile terminal is in any position and the user holds the foldable mobile terminal in a commonly used grip, at least four radiators in antenna system 3 are simultaneously active, thereby enhancing the communication capabilities of the foldable mobile terminal.

[0146] In a specific embodiment, multiple radiators in the antenna system 3 are connected to the same first RF chip 31, so that the antenna system 3 forms a multiple-input multiple-output (MIMO) antenna system 3. The MIMO antenna system 3 refers to a communication system that uses multiple antennas at both the transmitting and receiving ends, thereby exponentially increasing the capacity and spectrum utilization of the communication system without increasing the bandwidth.

[0147] In a specific embodiment, the antenna system 3 further includes a control switch, which is connected between the radiator of the antenna system 3 and the first RF chip 31. The control switch is used to connect multiple radiators and the first RF chip 31 according to the strength of the transmission signal of each radiator of the antenna system 3. In a specific implementation, the control switch can select a preset number of radiators and the first RF chip 31 with the strongest transmission signal strength according to the strength of the transmission signal of each radiator of the antenna system 3, so as to communicate using the preset number of connected radiators. Specifically, the preset number can include four or five, etc. Alternatively, in a specific implementation, the control switch can select a radiator and the first RF chip 31 with a transmission signal strength greater than a preset value according to the strength of the transmission signal of each radiator of the antenna system 3, so as to communicate using the preset number of connected radiators.

[0148] In addition, the control switch can also connect multiple radiators and the first RF chip 31 based on the posture of the foldable mobile terminal. Specifically, the control switch can also select the radiator to be connected and the first RF chip 31 based on the signal of a Hall sensor, a gyroscope, or a specific absorption rate (SAR sensor).

[0149] Similar to the above-mentioned embodiment, there are multiple options for the setting of the first RF chip 31 in the embodiment of the present application. For example, in a specific embodiment, the foldable movable body may include a first RF chip 31, which is installed in the first shell 11, and the radiator located in the first shell 11 is directly connected to the first RF chip 31; the radiator located in the second shell 12 is connected to the first RF chip 31 through a flexible electrical connector. For example, the above-mentioned flexible electrical connector can be an electrical connector such as a flexible circuit board, a strip line or a jumper.

[0150] In order to improve the signal transmission effect between the radiator located in the second shell 12 and the first RF chip 31, in one embodiment, a power amplifier 36 (PA) is connected between the first RF chip 31 and the radiator located in the second shell 12. The power amplifier 36 is used to process the signal emitted outward by the radiator. By providing the power amplifier 36, the problem of large loss between the radiator of the second shell 12 and the first RF chip 31 can be compensated, and the working effect of the radiator located in the second shell 12 can be improved. In a specific embodiment, each radiator in the second shell 12 that radiates signals outward is connected to a power amplifier 36.

[0151] In one embodiment, a low noise amplifier 37 (LNA) is connected between the first RF chip 31 and the radiator located in the second shell 12. The low noise amplifier 37 is used to process the signal received by the radiator, thereby improving the quality of the signal received by the radiator of the antenna system 3 located in the second shell 12 and improving the working effect of the antenna system 3.

[0152] In a specific embodiment, a radiator used for both transmitting and receiving signals is connected to a power amplifier 36 and a low noise amplifier 37 , and the power amplifier 36 and the low noise amplifier 37 are integrated into a front-end RF module (FEM).

[0153] In one embodiment, the antenna system 3 of the foldable mobile terminal includes two first RF chips 31, wherein one of the first RF chips 31 is mounted on the first shell 11, and the first RF chip 31 located in the first shell 11 is connected to the radiator located in the first shell 11. The other first RF chip 31 is mounted on the second shell 12, and the first RF chip 31 located in the second shell 12 is connected to the radiator located in the second shell 12. In a specific embodiment, the two first RF chips 31 of the antenna system 3 are respectively connected to the system-level chip 4 to work together. In this embodiment, each radiator is connected to a first RF chip 31 that is relatively close, which can reduce the loss of the signal transmission path and enhance the communication capability of the antenna system 3.

[0154] In a specific embodiment, the two first RF chips 31 may have a variety of configuration options. For example, the first RF chip 31 located in the first housing 11 may support 2T4R communication, and the first RF chip 31 located in the second housing 12 may support 1T2R communication. Alternatively, the first RF chip 31 located in the first housing 11 may support 1T4R communication, and the first RF chip 31 located in the second housing 12 may support 1T4R communication. Alternatively, the first RF chip 31 located in the first housing 11 may support 1T4R communication, and the first RF chip 31 located in the second housing 12 may support 1T2R communication. Alternatively, the first RF chip 31 located in the first housing 11 may support 1T2R communication, and the first RF chip 31 located in the second housing 12 may support 1T2R communication.

[0155] Figure 35 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application. As shown in Figure 35, the present application also provides a foldable mobile terminal having a first housing 11 comprising a first side 111, a second side 112, and a third side 113 connected in sequence. The first side 111 and the third side 113 are respectively perpendicular to the extension direction of the first rotation axis 13. The second housing 12 comprises a fourth side 121, a fifth side 122, and a sixth side 123 connected in sequence. The fourth side 121 and the sixth side 123 are respectively perpendicular to the extension direction of the first rotation axis 13. The first side 111 and the fourth side 121 are located at the top of the foldable mobile terminal. The top is the top when the user is normally using the foldable mobile terminal, with the application icons facing upward. In one embodiment, the top may refer to the direction of the earpiece of the foldable mobile terminal, while the direction of the microphone is the bottom of the foldable mobile terminal. The antenna system 3 includes a first RF chip 31 and multiple radiators, each of which is connected to the first RF chip 31. Specifically, each radiator has a feeding point, and the feeding point of the radiator is connected to the first RF chip 31. The first RF chip 31 is used to feed the multiple radiators, thereby realizing the communication function of the radiator. The frequency range of the multiple radiators in the embodiment of the present application is within 600MHz to 960MHz. Specifically, the antenna system 3 operates in the low frequency band. The multiple radiators include a sixth radiator 316, a seventh radiator 317, an eighth radiator 318 and a ninth radiator 319, wherein the sixth radiator 316 is located on the second side 112, the seventh radiator 317 is located on the third side 113, the eighth radiator 318 is located on the fifth side 122, and the ninth radiator 319 is located on the sixth side 123.

[0156] In this embodiment, antenna system 3 includes at least four radiators. Two of the multiple radiators in antenna system 3 operate at the same frequency, with at least one radiator transmitting signals and both radiators receiving signals. In this solution, the radiators in antenna system 3 operating at the same frequency implement a 1T2R operating mode, improving the communication efficiency of antenna system 3 and the communication capabilities of the foldable mobile terminal.

[0157] In a specific embodiment, the foldable mobile terminal can be in any posture, and through reasonable allocation, at least two radiators can work simultaneously. The two radiators work together, so that the directional pattern of the antenna system 3 is not prone to blind spots in any posture, thereby improving the communication effect of the foldable mobile terminal.

[0158] In a specific embodiment, multiple radiators in the antenna system 3 are connected to the same first RF chip 31, so that the antenna system 3 forms a multiple-input multiple-output (MIMO) antenna system 3. The MIMO antenna system 3 refers to a communication system that uses multiple antennas at both the transmitting and receiving ends, thereby exponentially increasing the capacity and spectrum utilization of the communication system without increasing the bandwidth.

[0159] In one specific embodiment, a distance L1 between the upper edge of the sixth radiator 316 and the first side 111 is less than a distance L2 between the upper edge of the sixth radiator 316 and the third side 113; and a distance L3 between the upper edge of the eighth radiator 318 and the fourth side 121 is less than a distance L4 between the upper edge of the eighth radiator 318 and the sixth side 123. Specifically, the upper edge of the sixth radiator 316 refers to the upper edge of the sixth radiator 316 facing the first side 111, and the upper edge of the eighth radiator 318 refers to the upper edge of the eighth radiator 318 facing the fourth side 121. In this embodiment, both the first side 111 and the fourth side 121 are located at the top of the foldable mobile terminal. This top is the top when the user is normally using the foldable mobile terminal, with application icons facing upward. In one embodiment, the top may refer to the direction of the earpiece of the foldable mobile terminal, while the direction of the microphone is the bottom of the foldable mobile terminal. This solution is beneficial for users in the normal use of the foldable mobile terminal (holding the hand at the bottom side of the foldable mobile terminal), as the hand is not likely to block the signal, and the foldable mobile terminal has better communication performance.

[0160] Similar to the above-mentioned embodiment, there are multiple options for the setting of the first RF chip 31 in the embodiment of the present application. For example, in a specific embodiment, the foldable movable body may include a first RF chip 31, which is installed in the first shell 11, and the radiator located in the first shell 11 is directly connected to the first RF chip 31; the radiator located in the second shell 12 is connected to the first RF chip 31 through a flexible electrical connector. For example, the above-mentioned flexible electrical connector can be an electrical connector such as a flexible circuit board, a strip line or a jumper.

[0161] In order to improve the signal transmission effect between the radiator located in the second shell 12 and the first RF chip 31, in one embodiment, a power amplifier 36 (PA) is connected between the first RF chip 31 and the radiator located in the second shell 12. The power amplifier 36 is used to process the signal emitted outward by the radiator. By providing the power amplifier 36, the problem of large loss between the radiator of the second shell 12 and the first RF chip 31 can be compensated, and the working effect of the radiator located in the second shell 12 can be improved. In a specific embodiment, each radiator in the second shell 12 that radiates signals outward is connected to a power amplifier 36.

[0162] In one embodiment, a low noise amplifier 37 (LNA) is connected between the first RF chip 31 and the radiator located in the second shell 12. The low noise amplifier 37 is used to process the signal received by the radiator, thereby improving the quality of the signal received by the radiator of the antenna system 3 located in the second shell 12 and improving the working effect of the antenna system 3.

[0163] In one embodiment, the antenna system 3 of the foldable mobile terminal includes two first RF chips 31, wherein one of the first RF chips 31 is mounted on the first shell 11, and the first RF chip 31 located in the first shell 11 is connected to the radiator located in the first shell 11. The other first RF chip 31 is mounted on the second shell 12, and the first RF chip 31 located in the second shell 12 is connected to the radiator located in the second shell 12. In a specific embodiment, the two first RF chips 31 of the antenna system 3 are respectively connected to the system-level chip 4 to work together. In this embodiment, each radiator is connected to a first RF chip 31 that is relatively close, which can reduce the loss of the signal transmission path and enhance the communication capability of the antenna system 3.

[0164] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A foldable mobile terminal, characterized in that: The device comprises a first housing, a second housing, a first rotating shaft and an antenna system, wherein: The first shell and the second shell can be folded or unfolded relative to the first rotation axis; The antenna system includes a first radio frequency chip, a first main radiator, and a second main radiator, wherein the first main radiator is located on a side of the first shell, and the second main radiator is located on a side of the second shell; in a folded state, the orthographic projection of the side of the first main radiator in the thickness direction of the foldable mobile terminal and the orthographic projection of the side of the second main radiator in the thickness direction of the foldable mobile terminal coincide with each other; The first main radiator is connected to a first phase shifter, which is connected between the first main radiator and the first RF chip; the second main radiator is connected to a second phase shifter, which is connected between the second main radiator and the first RF chip.

2. The foldable mobile terminal according to claim 1, wherein: When the first shell and the second shell are in a folded state, the current distribution on the first main radiator and the current distribution on the second main radiator are in the same direction.

3. The foldable mobile terminal according to claim 2, wherein: When the first shell and the second shell are in a folded state, the orthographic projection of the first main radiator along the thickness direction of the foldable mobile terminal at least partially overlaps with the orthographic projection of the second main radiator along the thickness direction of the foldable mobile terminal.

4. The foldable mobile terminal according to any one of claims 1 to 3, wherein: The first shell includes a first side, a second side, and a third side connected in sequence, the first side and the third side being perpendicular to the extension direction of the first rotation axis; the second shell includes a fourth side, a fifth side, and a sixth side connected in sequence, the fourth side and the sixth side being perpendicular to the extension direction of the first rotation axis; when the first shell and the second shell are in a folded state, the first side and the fourth side at least partially overlap; The first main radiator is at least partially located on the first side of the first shell, and the second main radiator is at least partially located on the fourth side of the second shell.

5. The foldable mobile terminal according to claim 4, wherein: The first side and the fourth side are both located at the top of the foldable mobile terminal.

6. The foldable mobile terminal according to any one of claims 1 to 5, wherein: The antenna system is a satellite antenna system, which is used for communicating with a communication satellite.

7. The foldable mobile terminal according to any one of claims 1 to 6, wherein: The terminal further includes a second rotating shaft and a third housing, wherein: The first housing, the first rotating shaft, the third housing, the second rotating shaft and the second housing are connected in sequence.

8. A foldable mobile terminal, characterized in that: The device comprises a first housing, a second housing, a first rotating shaft and an antenna system, wherein: The first shell and the second shell can be folded or unfolded relative to the first rotation axis; The first housing includes a first side, a second side, and a third side connected in sequence, the first side and the third side being perpendicular to the extension direction of the first rotating shaft; the second housing includes a fourth side, a fifth side, and a sixth side connected in sequence, the fourth side and the sixth side being perpendicular to the extension direction of the first rotating shaft, and the first side and the fourth side being located at the top of the foldable mobile terminal; The antenna system includes a first radio frequency chip and multiple radiators, the multiple radiators are respectively connected to the first radio frequency chip, and the first radio frequency chip is used to feed the multiple radiators; the frequency range of the signals transmitted by the multiple radiators is within 1.7 GHz to 5 GHz; the multiple radiators include a first radiator, a second radiator, a third radiator, a fourth radiator and a fifth radiator, wherein the first radiator is located on the first side, the second radiator and the third radiator are respectively located on the second side, the fourth radiator is located on the third side, and the fifth radiator is located on the fourth side; Four radiators among the multiple radiators operate at the same frequency, at least one of the four radiators is used to transmit signals at the same time, and the four radiators are used to receive signals at the same time.

9. The foldable mobile terminal according to claim 8, wherein: The multiple radiators of the antenna system are connected to the same first RF chip of the antenna system.

10. The foldable mobile terminal according to claim 9, wherein: The first radio frequency chip is mounted on the first housing, and the radiator of the antenna system located in the second housing is connected to the first radio frequency chip via a flexible electrical connector.

11. The foldable mobile terminal according to claim 10, wherein: A power amplifier PA is connected between the first radio frequency chip and the radiator located in the second shell.

12. The foldable mobile terminal according to claim 10 or 11, wherein: A low noise amplifier LNA is further connected between the first radio frequency chip and the radiator located in the second shell.

13. The foldable mobile terminal according to claim 8, wherein: The antenna system includes two first RF chips, one of which is installed in the first shell and connected to the radiator located in the first shell; the other first RF chip is installed in the second shell and connected to the radiator located in the second shell.

14. The foldable mobile terminal according to any one of claims 8 to 13, wherein: The antenna system further includes a control switch connected between the radiator of the antenna system and the first radio frequency chip; The control switch is used to connect the plurality of radiators and the first radio frequency chip according to the strength of the signal transmitted by each radiator of the antenna system.

15. A foldable mobile terminal, characterized in that: The device comprises a first housing, a second housing, a first rotating shaft and an antenna system, wherein: The first shell and the second shell can be folded or unfolded relative to the first rotation axis; The first housing includes a first side, a second side, and a third side connected in sequence, the first side and the third side being perpendicular to the extension direction of the first rotating shaft; the second housing includes a fourth side, a fifth side, and a sixth side connected in sequence, the fourth side and the sixth side being perpendicular to the extension direction of the first rotating shaft, and the first side and the fourth side being located at the top of the foldable mobile terminal; The antenna system includes a first radio frequency chip and multiple radiators, the multiple radiators are respectively connected to the first radio frequency chip, and the first radio frequency chip is used to feed the multiple radiators; the frequency range of the signals transmitted by the multiple radiators is within 600 MHz to 960 MHz; the multiple radiators include a sixth radiator, a seventh radiator, an eighth radiator, and a ninth radiator, wherein the sixth radiator is located on the second side, the seventh radiator is located on the third side, the eighth radiator is located on the fifth side, and the ninth radiator is located on the sixth side; Two of the multiple radiators operate at the same frequency, at least one of the two radiators is used to transmit signals, and both of the two radiators are used to receive signals at the same time.

16. The foldable mobile terminal according to claim 15, wherein: The plurality of radiators of the antenna system are connected to the same first radio frequency chip.

17. The foldable mobile terminal according to claim 15 or 16, wherein: The distance between the upper edge of the sixth radiator facing the first side and the first side is shorter than the distance between the sixth radiator and the third side; the distance between the upper edge of the eighth radiator facing the fourth side and the fourth side is shorter than the distance between the eighth radiator and the sixth side.

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