Foldable electronic equipment and method for improving antenna efficiency of foldable electronic equipment

Abstract

The invention provides foldable electronic equipment which comprises a first main body and a second main body which are connected with each other through a connecting part, and the first main body and the second main body can be relatively folded or unfolded; a first antenna is arranged in a frame of the first main body, a second antenna is arranged in the second main body, and a grounding end of the first antenna and a grounding end of the second antenna are electrically connected when the first main body and the second main body are in a folded state. The invention further provides a method for improving the antenna efficiency of the foldable electronic equipment. The first antenna grounding end in the first main body and the second antenna grounding end in the second main body which can be relatively folded or unfolded in the foldable electronic equipment are electrically connected to form short circuit connection, so that loading of an equivalent circuit is realized, and frequency deviation or mode change of a floor characteristic mode occurs; and the influence of a floor characteristic mode formed when the electronic equipment is folded on the antenna performance is reduced.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a foldable electronic device and a method for improving the antenna efficiency of a foldable electronic device. Background Art

[0002] After electronic devices such as mobile phones entered the intelligent era, their appearance forms have changed from large screens to full screens and then to foldable screens. Foldable electronic devices have two forms: unfolded and folded, which bring new challenges to antenna design. When the electronic device is in the folded state, its antenna performance significantly deteriorates. Summary of the Invention

[0003] This application provides a foldable electronic device. By performing equivalent circuit loading on the electronic device in the folded state, the clutter generation frequency can be shifted or the mode can be changed, thereby improving the antenna performance of the electronic device in the folded state.

[0004] This application provides a foldable electronic device, including: a first main body and a second main body connected to each other through a connection part, where the first main body and the second main body can be relatively folded or unfolded;

[0005] A first antenna is disposed in the frame of the first main body, and a second antenna is disposed in the second main body. The ground terminals of the first antenna and the second antenna are electrically connected when the first main body and the second main body are in the folded state.

[0006] This application electrically connects the ground terminal of the first antenna in the first main body and the ground terminal of the second antenna in the second main body that can be relatively folded or unfolded in the foldable electronic device to form a short-circuit connection, thereby realizing the loading of the equivalent circuit, so that the frequency of the floor eigenmode is shifted or the mode is changed, and reducing the influence of the floor eigenmode formed when the electronic device is in the folded state on the antenna performance. Experiments prove that electrically connecting the ground terminal of the first antenna and the ground terminal of the second antenna in different regions of the foldable electronic device has different effects on the frequency shift of the floor eigenmode. Those skilled in the art can select the electrical connection of the ground terminal of the first antenna and the ground terminal of the second antenna at different positions according to the antenna design.

[0007] In some specific implementation manners, the first antenna and the second antenna of the foldable electronic device are respectively disposed in the frame parts of the first main body and the second main body, and are respectively grounded through the frame, that is, their ground terminals are located inside the frame. Those skilled in the art can understand that in some implementation manners, the frame is part of the middle frame, and it can also be considered that the antenna is grounded through the middle frame.

[0008] In some specific implementation manners, at the frame portion of the foldable electronic device that is far from the connection portion and parallel to the connection portion, electrically connecting the ground terminal of the first antenna and the ground terminal of the second antenna can effectively shift the frequency of the floor eigenmode and reduce the impact on the antenna performance.

[0009] In some specific implementation manners, at one of the frame portions of the foldable electronic device that is perpendicular to the connection portion, electrically connecting the ground terminal of the first antenna and the ground terminal of the second antenna at a position close to, in the middle of, or far from the connection portion in a point-to-point or line-to-line manner can effectively shift the frequency of the floor eigenmode and reduce the impact on the antenna performance.

[0010] In some specific implementation manners, at two frame portions of the foldable electronic device that are perpendicular to the connection portion, electrically connecting all the ground terminals of the first antenna and the ground terminals of the second antenna in one frame (i.e., line-to-line connection), and making point-to-point electrical connections at positions close to, in the middle of, or far from the connection portion in the other frame can effectively cause a relatively large frequency shift of the floor eigenmode and reduce the impact on the antenna performance.

[0011] In some specific implementation manners, at two frame portions of the foldable electronic device that are perpendicular to the connection portion, electrically connecting all the ground terminals of the first antenna and the ground terminals of the second antenna (i.e., line-to-line connection) can effectively cause the maximum frequency shift of the floor eigenmode and reduce the impact on the antenna performance.

[0012] In some specific implementation manners, the ground terminal of the first antenna and the ground terminal of the second antenna can be electrically connected through a conductive layer or a conductive sheet when the first body and the second body are in a folded state. For example, forming a silver conductive layer by coating silver paste, or forming a metal coating through processes such as laser direct structuring (LDS), direct pad printing process (PDS), magnetron sputtering plating (MSP), or forming a conductive sheet by inlaying a metal sheet, etc., so as to realize the electrical connection between the ground terminal of the first antenna and the ground terminal of the second antenna and form an equivalent circuit.

[0013] This application also provides a method for improving the antenna efficiency of a foldable electronic device, including the following steps:

[0014] A) Provide a foldable electronic device, which includes a first body and a second body connected to each other through a connection portion, and the first body and the second body can be relatively folded or unfolded; a first antenna is provided in the frame of the first body, and a second antenna is provided in the second body;

[0015] B) Apply an equivalent circuit to the large electric field region when the foldable electronic device is in a folded state.

[0016] In some specific implementation manners, step B) specifically includes:

[0017] Connect the grounding ends of the first antenna and the second antenna so that they are electrically connected when the first body and the second body are in the folded state.

[0018] In this application, by electrically connecting the grounding end of the first antenna in the first body that can be relatively folded or unfolded and the grounding end of the second antenna in the second body of the foldable electronic device to form a short-circuit connection, the loading of the equivalent circuit is realized, so that the frequency of the floor characteristic mode is shifted or the mode is changed, reducing the influence of the floor characteristic mode formed when the electronic device is in the folded state on the antenna performance. Experiments have proved that electrically connecting the grounding end of the first antenna and the grounding end of the second antenna in different regions of the foldable electronic device has different effects on the frequency shift of the floor characteristic mode. Those skilled in the art can select the electrical connection of the grounding end of the first antenna and the grounding end of the second antenna at different positions according to the antenna design. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a mobile phone;

[0020] Figure 2 It is a schematic structural diagram of the mobile phone when it is in the folded state;

[0021] Figure 3 It is a schematic structural diagram of the floor characteristic mode generated when the mobile phone is in the folded state;

[0022] Figure 4 It is the mode significance MS of the simulated folded floor characteristic mode;

[0023] Figure 5 It is a schematic diagram of the current distribution corresponding to the long side of the floor characteristic mode;

[0024] Figure 6 It is a schematic diagram of the current distribution corresponding to the short side of the floor characteristic mode;

[0025] Figure 7 It is a schematic diagram of the current distribution corresponding to the surface of the floor characteristic mode;

[0026] Figure 8 It is a schematic diagram of the antenna distribution structure of the mobile phone provided by this application;

[0027] Figure 9 It is a schematic diagram of the first electrical connection method of the mobile phone provided by this application;

[0028] Figure 10 It is the first way of electrical connection;

[0029] Figure 11 It is the second way of electrical connection;

[0030] Figure 12Schematic diagram of the second electrical connection method of the mobile phone provided by this application;

[0031] Figure 13 Schematic diagram of the third electrical connection method of the mobile phone provided by this application;

[0032] Figure 14 Schematic diagram of the fourth electrical connection method of the mobile phone provided by this application;

[0033] Figure 15 Schematic diagram of the fifth electrical connection method of the mobile phone provided by this application;

[0034] Figure 16 Schematic diagram of the sixth electrical connection method of the mobile phone provided by this application;

[0035] Figure 17 Schematic diagram of the seventh electrical connection method of the mobile phone provided by this application;

[0036] Figure 18 Schematic diagram of the eighth electrical connection method of the mobile phone provided by this application;

[0037] Figure 19 Schematic diagram of the ninth electrical connection method of the mobile phone provided by this application;

[0038] Figure 20 Mode significance diagram of mobile phones with electrical connections at different positions. Detailed implementation

[0039] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0040] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second" and similar words used in this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms "connected" or "coupled" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0041] Different from straight-board products, foldable electronic devices have two forms: unfolded and folded. Taking a mobile phone as an example, refer to Figure 1 and Figure 2 , Figure 1 which are schematic structural diagrams of the mobile phone, Figure 2 and Figure 2 is the schematic structural diagram of the mobile phone when in the folded state. The mobile phone 100 includes a first main body 11 and a second main body 12 that are connected to each other. In this embodiment, the mobile phone 100 further includes a connecting portion (not shown in the figure) disposed between the first main body 11 and the second main body 12. The first main body 11 and the second main body 12 are connected through the connecting portion, and the two can be relatively folded or unfolded through the connecting portion, so that the mobile phone has two usage modes. As

[0042] shown, when the mobile phone 100 is in the folded state, a gap G0 is formed between the first main body 11 and the second main body. In some specific implementation manners, the first main body 11 is provided with a first antenna 13, and the first antenna 13 includes a first radiator disposed on the frame of the first main body 11; a second antenna 14 is disposed in the second main body 12, and the second antenna 14 includes a second radiator disposed on the frame of the second main body 12.

[0042] The inventors found that when the mobile phone is in the folded state, floor eigenmodes similar in structure and size to the mobile phone will be generated, as Figure 3 and Figure 4 shown, Figure 3 is the schematic structural diagram of the floor eigenmode generated when the mobile phone is in the folded state, Figure 4For the mode significance MS of the simulated folded floor feature mode, curves 1 to 8 correspond to model1 to 8 respectively. Similar to a mobile phone, the floor feature mode 200 includes a first feature mode 21 and a second feature mode 22 connected to each other through a connecting part (not shown in the figure), and a gap G1 is formed between the first feature mode 21 and the second feature mode 22. The first feature mode 21 has a long side 211, a short side 212, and a surface 213. Correspondingly, the second feature mode 22 has a long side 221, a short side 222, and a surface 223.

[0043] In the floor feature mode 200, different current distributions exist according to the positions of the first radiator and the second radiator. For example, a circular current distribution is formed in the long side 211 of the first feature mode, the long side 221 of the corresponding second feature mode, and the gap therebetween, which is called the J01 mode, that is, the long side feature mode, and its frequency is about 0.8 GHz; a circular current distribution is formed in the short side 212 of the first feature mode, the short side 222 of the corresponding second feature mode, and the gap therebetween, which is called the J10 mode, that is, the short side feature mode, and its frequency is about 1.05 GHz; a circular current distribution is formed in the surface 213 of the first feature mode, the surface 223 of the corresponding second feature mode, and the gap therebetween, which is called the J02 mode, which is the surface feature mode, and its frequency is about 1.8 GHz, as Figure 5 、 Figure 6 and Figure 7 shown, where Figure 5 is a schematic diagram of the current distribution corresponding to the long side of the floor feature mode. Among them, 51 is the long side feature mode, Figure 6 is a schematic diagram of the current distribution corresponding to the short side of the floor feature mode. Among them, 61 is the short side feature mode, Figure 7 is a schematic diagram of the current distribution corresponding to the surface of the floor feature mode. Among them, 71 is the surface feature mode. Since the clearance of the middle frame is small when the mobile phone is in the folded state, the floor feature mode falling within the signal band will seriously affect the antenna efficiency of the frame.

[0044] Based on this, the present application loads an equivalent circuit (equivalent LC) between the first body 11 and the second body 12, so that the floor feature mode generated when the mobile phone is in the folded state undergoes frequency shift or mode change, thereby reducing the influence of clutter on the antenna efficiency of the frame. Specifically, in the circular current mode formed by the first radiator and the second radiator, the equivalent circuit is loaded in the large electric field region thereof, so that the floor feature mode undergoes frequency shift and the influence of clutter on the antenna efficiency of the frame is reduced.

[0045] In some possible implementation manners, the present application realizes the equivalent circuit loading through a short-circuit connection method. Specifically, the ground end of the first antenna 13 is electrically connected to the ground end of the second antenna 14 when the mobile phone is in the folded state, and the equivalent circuit loading can be realized.

[0046] In some possible implementations, the grounding end of the mobile phone antenna is disposed on the mobile phone frame. Refer to Figure 8 , Figure 8 which is a schematic diagram of the antenna distribution structure of the mobile phone provided by this application. The first main body 11 includes a first frame connected to the connecting portion, a second frame 112 away from the first frame, a third frame 113 connecting the first side of the first frame and the second frame 112, and a fourth frame connecting the other side of the first frame and the second frame 112; the grounding end of the first antenna is distributed in the first frame, the second frame 112, the third frame 113, and the fourth frame, and is electrically connected to each frame; the second main body 12 includes a fifth frame connected to the connecting portion, a sixth frame 122 away from the fifth frame, a seventh frame 123 corresponding to the third frame 113 and connecting the fifth frame and the sixth frame 122 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 122 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 122, the seventh frame 123, and the eighth frame, and is electrically connected to each frame. Electrically connecting the grounding end of the first antenna and the grounding end of the second antenna can cause the frequency of the floor eigenmode to shift or the mode to change, reducing the influence on the efficiency of the frame antenna.

[0047] Specifically, when the grounding end of the antenna is electrically connected to the mobile phone frame, electrically connecting the frames of the first main body and the second main body of the mobile phone when the mobile phone is in the folded state can achieve the electrical connection between the grounding end of the first antenna and the grounding end of the second antenna, playing a role similar to an equivalent circuit, causing the frequency of the floor eigenmode to shift or the mode to change, and reducing the influence on the antenna efficiency.

[0048] In some possible implementations, the grounding end of the antenna is electrically connected to the frame through a conductive layer to achieve grounding of the antenna. The conductive layer can be formed by ultrasonic welding, silver paste printing, spraying, or other methods, and there are no special restrictions in the embodiments of this application. In other possible implementations, the grounding end of the antenna is electrically connected to the frame through a conductive auxiliary material, such as a metal shrapnel, etc., to achieve grounding of the antenna.

[0049] The electrical connection of the grounding ends of the antennas at different positions and in different ways on the mobile phone frame will affect the degree of frequency shift of the floor eigenmode. Short-circuit connection in the large electric field region of the circular current formed when the first main body and the second main body of the mobile phone are in the folded state can cause the maximum shift in the frequency of the floor eigenmode, reducing the influence on the antenna efficiency.

[0050] Refer to Figure 9 , Figure 9Schematic diagram of the first electrical connection method of the mobile phone provided by this application. Among them, the first main body 81 includes a first frame connected to the connection part, a second frame 812 far from the first frame, a third frame 813 connecting the first side of the first frame and the second frame 812, and a fourth frame connecting the other side of the first frame and the second frame 812. The first frame, the second frame 812, the third frame 813, and the fourth frame form the frame of the first main body 81 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 812, the third frame 813, and the fourth frame, and is electrically connected to each frame; the second main body 82 includes a fifth frame connected to the connection part, a sixth frame 822 far from the fifth frame, a seventh frame 823 corresponding to the third frame 813 and connecting the fifth frame and the sixth frame 822 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 822 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 822, the seventh frame 823, and the eighth frame, and is electrically connected to each frame. In this embodiment, the grounding end of the first antenna at the position where the third frame 813 is close to the first frame is electrically connected to the grounding end of the second antenna at the position where the seventh frame 823 is close to the fifth frame when the mobile phone is in the folded state, that is, point-to-point electrical connection.

[0051] This application has no special restrictions on the method of electrically connecting the grounding end of the first antenna and the grounding end of the second antenna, and conductive coatings, conductive sheets, etc. can be used. Specifically, see Figure 10 , Figure 10 For the first method of electrical connection, where 101 is the radiator of the first antenna, 1011 is the first metal layer, 102 is the radiator of the second antenna, 1021 is the second metal layer, and the first metal layer 1011 and the second metal layer 1021 are electrically connected, for example, the first metal layer 1011 and the second metal layer 1021 are connected. A typical process is as follows:

[0052] The radiators of the first antenna and the second antenna are respectively injection-molded and then polished, metal slurries are respectively sprayed, and the slurries of the first antenna radiator and the second antenna radiator are electrically connected. After baking, the electrically connected first metal layer and second metal layer are obtained, and finally paint is sprayed.

[0053] In some specific implementation manners, the thickness of the metal layer formed by the first antenna radiator and the second antenna radiator is 8 - 30 μm, and the impedance between any two points is less than 5 ohm. In some specific implementation manners, the metal slurry is silver paste, and the formed metal layer is a silver metal layer.

[0054] In some specific implementation manners, processes such as Laser Direct Structuring (LDS), Direct Pad Printing Process (PDS), and Magnetron Sputtering Plating (MSP) can also be adopted to achieve the electrical connection between the first antenna ground terminal and the second antenna ground terminal. For example, a typical process of LDS is as follows:

[0055] The radiators of the first antenna and the second antenna are respectively injection molded and then laser engraved, chemically plated to form a first metal layer and a second metal layer respectively, and the first metal layer of the first antenna radiator is electrically connected to the second metal layer of the second antenna radiator, and finally, paint is sprayed.

[0056] See Figure 11 , Figure 11 For the second way of electrical connection, where 111 is the radiator of the first antenna, 1111 is the first metal sheet, 112 is the radiator of the second antenna, 1121 is the second metal sheet, and the first metal sheet 1111 and the second metal sheet 1121 are electrically connected. A typical process is as follows:

[0057] The first metal sheet and the second metal sheet are respectively stamped and then injection molded with the radiators of the first antenna and the second antenna, and the first metal sheet and the second metal sheet are electrically connected. After punching and cutting the connecting material, grinding is carried out, and finally, paint is sprayed.

[0058] In some specific implementation manners, the metal sheet is a steel sheet.

[0059] In some possible implementation manners, the third frame 813 is close to the first frame position, and electrical connection with the corresponding position of the seventh frame 823 is achieved at any one or more points at one-fourth to one-third of the third frame 813 when the mobile phone is in a folded state. In some possible implementation manners, the third frame 813 is close to the first frame position, and electrical connection with the corresponding position of the seventh frame 823 is achieved at one-third of the third frame 813 when the mobile phone is in a folded state.

[0060] See Figure 12 , Figure 12Schematic diagram of the second electrical connection method of the mobile phone provided by this application. Among them, the first main body 121 includes a first frame connected to the connection part, a second frame 1212 far from the first frame, a third frame 1213 connecting the first side of the first frame and the second frame 1212, and a fourth frame connecting the other side of the first frame and the second frame 1212. The first frame, the second frame 1212, the third frame 1213, and the fourth frame form the frame of the first main body 121 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 1212, the third frame 1213, and the fourth frame, and is electrically connected to each frame; the second main body 122 includes a fifth frame connected to the connection part, a sixth frame 1222 far from the fifth frame, a seventh frame 1223 corresponding to the third frame 1213 and connecting the fifth frame and the sixth frame 1222 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 1222 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 1222, the seventh frame 1223, and the eighth frame, and is electrically connected to each frame. In this embodiment, the grounding end of the first antenna at the middle position of the third frame 1213 is electrically connected to the grounding end of the second antenna at the middle position of the seventh frame 1223 when the mobile phone is in the folded state, that is, point-to-point connection. The electrical connection method can be referred to Figure 10 and Figure 11 , which will not be elaborated in this application.

[0061] In some possible implementation manners, at a position of the third frame 1213 close to the first frame, electrical connection with the corresponding position of the seventh frame 1223 is achieved at any one or more points from three-eighths to five-eighths of the third frame 1213 when the mobile phone is in the folded state. In some possible implementation manners, at a position of the third frame 1213 close to the first frame, electrical connection with the corresponding position of the seventh frame 1223 is achieved at the midpoint of the third frame 1213 when the mobile phone is in the folded state.

[0062] Refer to Figure 13 , Figure 13Schematic diagram of the third electrical connection method of the mobile phone provided by this application. Among them, the first main body 131 includes a first frame connected to the connection part, a second frame 1312 far from the first frame, a third frame 1313 connecting the first side of the first frame and the second frame 1312, and a fourth frame connecting the other side of the first frame and the second frame 1312. The first frame, the second frame 1312, the third frame 1313, and the fourth frame form the frame of the first main body 131 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 1312, the third frame 1313, and the fourth frame, and is electrically connected to each frame; the second main body 132 includes a fifth frame connected to the connection part, a sixth frame 1322 far from the fifth frame, a seventh frame 1323 corresponding to the third frame 1313 and connecting the fifth frame and the sixth frame 1322 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 1322 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 1322, the seventh frame 1323, and the eighth frame, and is electrically connected to each frame. In this embodiment, the grounding end of the first antenna at the position where the third frame 1313 is close to the second frame 1312 is electrically connected to the grounding end of the second antenna at the position where the seventh frame 1323 is close to the sixth frame 1322 when the mobile phone is in the folded state, that is, point-to-point connection. The electrical connection method can be referred to Figure 10 and Figure 11 , which will not be elaborated in this application.

[0063] In some possible implementation manners, at the position where the third frame 1313 is close to the second frame 1312, electrical connection with the corresponding position of the seventh frame 1323 is achieved at any one or more points from one-fourth to one-third of the third frame 1313 when the mobile phone is in the folded state. In some possible implementation manners, at the position where the third frame 1313 is close to the second frame 1312, electrical connection with the corresponding position of the seventh frame 1323 is achieved at one-third of the third frame 1313 when the mobile phone is in the folded state.

[0064] See Figure 14 , Figure 14Schematic diagram of the fourth electrical connection method of the mobile phone provided by this application. Among them, the first main body 141 includes a first frame connected to the connection part, a second frame 1412 far from the first frame, a third frame 1413 connecting the first side of the first frame and the second frame 1412, and a fourth frame connecting the other side of the first frame and the second frame 1412. The first frame, the second frame 1412, the third frame 1413, and the fourth frame form the frame of the first main body 141 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 1412, the third frame 1413, and the fourth frame, and is electrically connected to each frame; the second main body 142 includes a fifth frame connected to the connection part, a sixth frame 1422 far from the fifth frame 1421, a seventh frame 1423 corresponding to the third frame 1413 and connecting the fifth frame and the sixth frame 1422 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 1422 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 1422, the seventh frame 1423, and the eighth frame, and is electrically connected to each frame. In this embodiment, the third frame 1413 and the seventh frame 1423 are electrically connected when the mobile phone is in the folded state, that is, line-to-line or face-to-face connection. The electrical connection method can be referred to Figure 10 and Figure 11 , which will not be elaborated in this application.

[0065] See Figure 15 , Figure 15 Schematic diagram of the fifth electrical connection method of the mobile phone provided by this application. Among them, the first main body 151 includes a first frame connected to the connection part, a second frame 1512 far from the first frame, a third frame 1513 connecting the first side of the first frame and the second frame 1512, and a fourth frame connecting the other side of the first frame and the second frame 1512. The first frame, the second frame 1512, the third frame 1513, and the fourth frame form the frame of the first main body 151 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 1512, the third frame 1513, and the fourth frame, and is electrically connected to each frame; the second main body 152 includes a fifth frame connected to the connection part, a sixth frame 1522 far from the fifth frame, a seventh frame 1523 corresponding to the third frame 1513 and connecting the fifth frame and the sixth frame 1522 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 1522 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 1522, the seventh frame 1523, and the eighth frame, and is electrically connected to each frame. In this embodiment, the grounding end of the first antenna at the position where the second frame 1512 is close to the third frame 1513 is electrically connected to the grounding end of the second antenna at the position where the sixth frame 1522 is close to the seventh frame 1523 when the mobile phone is in the folded state. The electrical connection method can be referred to Figure 10and Figure 11 , which will not be elaborated in this application.

[0066] In some possible implementation manners, the second side frame 1512 is close to the third side frame 1513, and electrical connection with the corresponding position of the sixth side frame 1522 is achieved at any one or more points at one-fourth to one-third of the second side frame 1512 when the mobile phone is in a folded state. In some possible implementation manners, the second side frame 1512 is close to the third side frame 1513, and electrical connection with the corresponding position of the sixth side frame 1522 is achieved at one-third of the second side frame 1512 when the mobile phone is in a folded state.

[0067] See Figure 16 , Figure 16 is a schematic diagram of the sixth electrical connection manner of the mobile phone provided in this application. Among them, the first main body 161 includes a first side frame connected to the connecting portion, a second side frame 1612 far from the first side frame, a third side frame 1613 connecting the first side frame and the first side of the second side frame 1612, and a fourth side frame connecting the first side frame and the other side of the second side frame 1612. The first side frame, the second side frame 1612, the third side frame 1613, and the fourth side frame form the side frames of the first main body 161 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first side frame, the second side frame 1612, the third side frame 1613, and the fourth side frame, and is electrically connected to each side frame; the second main body 162 includes a fifth side frame connected to the connecting portion, a sixth side frame 1622 far from the fifth side frame, a seventh side frame 1623 corresponding to the third side frame 1613 and connecting the fifth side frame and the sixth side frame 1622 respectively, and an eighth side frame corresponding to the fourth side frame and connecting the fifth side frame 1621 and the sixth side frame 1622 respectively; the grounding end of the second antenna is distributed in the fifth side frame, the sixth side frame 1622, the seventh side frame 1623, and the eighth side frame, and is electrically connected to each side frame. In this embodiment, the grounding end of the first antenna at the middle position of the second side frame 1612 is electrically connected to the grounding end of the second antenna at the middle position of the sixth side frame 1622 when the mobile phone is in a folded state. The electrical connection manner can be seen in Figure 10 and Figure 11 , which will not be elaborated in this application.

[0068] In some possible implementation manners, electrical connection with the corresponding position of the sixth side frame 1622 is achieved at any one or more points at three-eighths to five-eighths of the second side frame 1612 when the mobile phone is in a folded state. In some possible implementation manners, electrical connection with the corresponding position of the sixth side frame 1622 is achieved at one-half of the second side frame 1612 when the mobile phone is in a folded state.

[0069] See Figure 17 , Figure 17Schematic diagram of the seventh electrical connection method of the mobile phone provided by this application. Among them, the first main body 171 includes a first frame connected to the connection part, a second frame 1712 far from the first frame, a third frame 1713 connecting the first side of the first frame and the second frame 1712, and a fourth frame connecting the other side of the first frame and the second frame 1712. The first frame, the second frame 1712, the third frame 1713, and the fourth frame form the frame of the first main body 171 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 1712, the third frame 1713, and the fourth frame and is electrically connected to each frame; the second main body 172 includes a fifth frame connected to the connection part, a sixth frame 1722 far from the fifth frame, a seventh frame 1723 corresponding to the third frame 1713 and connecting the fifth frame and the sixth frame 1722 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 1722 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 1722, the seventh frame 1723, and the eighth frame and is electrically connected to each frame. In this embodiment, the third frame 1713 is electrically connected to the seventh frame 1723 when the mobile phone is in the folded state, that is, line-to-line or face-to-face connection; at the same time, the grounding end of the first antenna at the position where the fourth frame is close to the second frame 1712 is electrically connected to the grounding end of the second antenna at the position where the eighth frame is close to the sixth frame 1722 when the mobile phone is in the folded state, that is, point-to-point connection. This electrical connection method can cause a large frequency shift in the characteristic mode, thereby reducing the influence on the efficiency of the frame antenna.

[0070] See Figure 18 , Figure 18Schematic diagram of the eighth electrical connection method of the mobile phone provided by this application. Among them, the first main body 181 includes a first frame connected to the connection part, a second frame 1812 far from the first frame, a third frame 1813 connecting the first side of the first frame and the second frame 1812, and a fourth frame connecting the other side of the first frame and the second frame 1812. The first frame, the second frame 1812, the third frame 1813, and the fourth frame form the frame of the first main body 181 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 1812, the third frame 1813, and the fourth frame, and is electrically connected to each frame; the second main body 182 includes a fifth frame connected to the connection part, a sixth frame 1822 far from the fifth frame, a seventh frame 1823 corresponding to the third frame 1813 and connecting the fifth frame and the sixth frame 1822 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 1822 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 1822, the seventh frame 1823, and the eighth frame, and is electrically connected to each frame. In this embodiment, the third frame 1813 and the seventh frame 1823 are electrically connected when the mobile phone is in the folded state, that is, line-to-line or face-to-face connection; at the same time, the fourth frame and the eighth frame are electrically connected when the mobile phone is in the folded state, that is, line-to-line or face-to-face connection. This electrical connection method can cause the maximum frequency shift of the characteristic mode, thereby reducing the influence on the efficiency of the frame antenna.

[0071] See Figure 19 , Figure 19 Schematic diagram of the ninth electrical connection method of the mobile phone provided by this application. Among them, the first main body 191 includes a first frame connected to the connection part, a second frame 1912 far from the first frame, a third frame 1913 connecting the first side of the first frame and the second frame 1912, and a fourth frame connecting the other side of the first frame and the second frame 1912. The first frame, the second frame 1912, the third frame 1913, and the fourth frame form the frame of the first main body 191 of the mobile phone. Among them, the grounding end of the first antenna is distributed in the first frame, the second frame 1912, the third frame 1913, and the fourth frame, and is electrically connected to each frame; the second main body 192 includes a fifth frame connected to the connection part, a sixth frame 1922 far from the fifth frame, a seventh frame 1923 corresponding to the third frame 1913 and connecting the fifth frame and the sixth frame 1922 respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame 1922 respectively; the grounding end of the second antenna is distributed in the fifth frame, the sixth frame 1922, the seventh frame 1923, and the eighth frame, and is electrically connected to each frame. In this embodiment, the second frame 1912 and the sixth frame 1922 are electrically connected when the mobile phone is in the folded state, that is, line-to-line or face-to-face connection.

[0072] Mobile phones that respectively implement the electrical connection between the ground terminal of the first antenna and the ground terminal of the second antenna according to the above nine methods are tested, and the results are shown in Figure 20 , Figure 20 is the mode significance diagram of mobile phones with electrical connections at different positions. Among them, curve 1 is the frequency curve of the mobile phone in the initial state, that is, the ground terminal of the first antenna and the ground terminal of the second antenna are not electrically connected, and curves 2-9 are the frequency curves of the first to eighth electrical connection methods described above. As can be seen from Figure 20 , the mobile phone provided by the present application can cause a frequency shift of the floor eigenmode, thereby reducing its impact on the frame antenna.

[0073] The present application also provides a method for improving the antenna efficiency of a foldable electronic device, including the following steps:

[0074] A) Provide a foldable electronic device, which includes a first body and a second body connected to each other through a connecting part, and the first body and the second body can be folded or unfolded relative to each other; a first antenna is provided in the frame of the first body, and a second antenna is provided in the second body;

[0075] B) Apply an equivalent circuit to the large electric field region when the foldable electronic device is in the folded state.

[0076] The foldable electronic device is as described above, and the present application will not elaborate here.

[0077] Applying an equivalent circuit to the large electric field region when the foldable electronic device is in the folded state can cause the maximum frequency shift of the clutter generated by it, thereby effectively improving the antenna efficiency of the electronic device in the folded state.

[0078] In some possible implementation manners, the large electric field region when the foldable electronic device is in the folded state can be determined according to the methods well known to those skilled in the art, and the present application has no special limitation on this.

[0079] In some specific implementation manners, the equivalent circuit can be applied by the following method:

[0080] Connect the ground terminal of the first antenna and the ground terminal of the second antenna so that they are electrically connected when the first body and the second body are in the folded state.

[0081] The position and manner of the electrical connection are as described above, and the present application will not elaborate here.

[0082] In the present application, by electrically connecting the ground terminal of the first antenna in the first body that can be relatively folded or unfolded in the foldable electronic device to the ground terminal of the second antenna in the second body to form a short - circuit connection, the loading of the equivalent circuit is achieved, so that the frequency of the floor eigen - mode is shifted or the mode is changed, reducing the influence of the floor eigen - mode formed in the folded state of the electronic device on the antenna performance. Experiments prove that the electrical connection of the ground terminal of the first antenna and the ground terminal of the second antenna in different regions of the foldable electronic device has different effects on the frequency shift of the floor eigen - mode, and those skilled in the art can select the electrical connection of the ground terminal of the first antenna and the ground terminal of the second antenna at different positions according to the antenna design.

[0083] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A foldable electronic device, comprising: a first body and a second body connected to each other through a connecting portion, the first body and the second body being relatively foldable or unfoldable; a first antenna is disposed in a frame of the first body, a second antenna is disposed in the second body, and a ground terminal of the first antenna and a ground terminal of the second antenna are electrically connected when the first body and the second body are in a folded state.

2. The foldable electronic device according to claim 1, wherein, the first body includes a first frame connected to the connecting portion, a second frame away from the first frame, a third frame connecting a first side of the first frame and the second frame, and a fourth frame connecting the other side of the first frame and the second frame; the ground terminal of the first antenna is distributed in the first frame, the second frame, the third frame, and the fourth frame; the second body includes a fifth frame connected to the connecting portion, a sixth frame away from the fifth frame, a seventh frame corresponding to the third frame and connecting the fifth frame and the sixth frame respectively, and an eighth frame corresponding to the fourth frame and connecting the fifth frame and the sixth frame respectively; the ground terminal of the second antenna is distributed in the fifth frame, the sixth frame, the seventh frame, and the eighth frame.

3. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna at a position of the second frame close to the third frame and the ground terminal of the second antenna at a position of the sixth frame close to the seventh frame are electrically connected when the first body and the second body are in a folded state.

4. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna at a middle position of the second frame and the ground terminal of the second antenna at a middle position of the sixth frame are electrically connected when the first body and the second body are in a folded state.

5. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna at a middle position of the third frame and the ground terminal of the second antenna at a middle position of the seventh frame are electrically connected when the first body and the second body are in a folded state.

6. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna at a position of the third frame close to the first frame and the ground terminal of the second antenna at a position of the seventh frame close to the fifth frame are electrically connected when the first body and the second body are in a folded state.

7. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna at a position of the third frame close to the second frame and the ground terminal of the second antenna at a position of the seventh frame close to the sixth frame are electrically connected when the first body and the second body are in a folded state.

8. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna in the third frame and the ground terminal of the second antenna in the seventh frame are electrically connected when the first body and the second body are in a folded state.

9. The foldable electronic device according to claim 2, wherein, The ground terminal of the first antenna in the second frame is electrically connected to the ground terminal of the second antenna in the sixth frame when the first body and the second body are in a folded state.

10. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna in the third frame is electrically connected to the ground terminal of the second antenna in the seventh frame when the first body and the second body are in a folded state; the ground terminal of the first antenna in the second frame is electrically connected to the ground terminal of the second antenna in the sixth frame when the first body and the second body are in a folded state.

11. The foldable electronic device according to claim 2, wherein, the ground terminal of the first antenna in the third frame is electrically connected to the ground terminal of the second antenna in the seventh frame when the first body and the second body are in a folded state; the ground terminal of the first antenna at a position of the fourth frame close to the second frame is electrically connected to the ground terminal of the second antenna at a position of the eighth frame close to the sixth frame when the first body and the second body are in a folded state.

12. The foldable electronic device according to any one of claims 1 to 11, wherein, the ground terminals of the first antenna and the second antenna are electrically connected by a conductive layer or a conductive sheet when the first body and the second body are in a folded state.

13. A method for improving the antenna efficiency of a foldable electronic device, wherein, it includes the following steps: A) Provide a foldable electronic device, which includes a first body and a second body connected to each other through a connecting part, and the first body and the second body can be relatively folded or unfolded; a first antenna is arranged in the frame of the first body, and a second antenna is arranged in the second body; B) Apply an equivalent circuit to the large electric field region when the foldable electronic device is in a folded state.

14. The method according to claim 13, wherein, the step B) specifically includes: Connect the ground terminals of the first antenna and the second antenna so that they are electrically connected when the first body and the second body are in a folded state.

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