Antenna device and electronic device

Abstract

Embodiments of the present application provide an antenna device and an electronic device. A main screen antenna and a sub-screen antenna are respectively designed in a main screen part and a sub-screen part of the electronic device. The main screen antenna and the sub-screen antenna can be same-frequency antennas, and the positions of the main screen antenna and the sub-screen antenna overlap when the folding screen is in a folded state. The main screen antenna and the sub-screen antenna can excite two high-isolation antenna modes. In this way, the main screen antenna and the sub-screen antenna can obtain good isolation even if they are same-frequency and overlap, and the radiation patterns are complementary, which is particularly beneficial to MIMO antenna design of the electronic device with a folding screen. Moreover, multiple same-frequency antennas do not have to be isolated in physical positions, for example, they do not have to be designed to be staggered in physical positions, and two or more same-frequency antennas with high isolation can be obtained, thereby fully utilizing the antenna design space of the electronic device with a folding screen.

Description

[0001] This application claims priority to the Chinese Patent Application No. 202011628760.9, filed on December 30, 2020, and entitled "Antenna Device and Electronic Device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of antennas, and in particular to an antenna device and an electronic device. BACKGROUND

[0003] With the development of mobile communication technology and the popularity of smart phones, in order to better user experience, novel appearance and function, the design of smart phones evolves from large screen, full screen, wrapable screen to foldable screen. The foldable screen of the electronic device such as the smart phone brings new possibilities for the functional design of the electronic device, which can be applied to and cover more new application scenarios. At the same time, the foldable screen also brings new challenges and new possibilities for the antenna design of the electronic device. SUMMARY

[0004] The embodiment of the present application provides an antenna device, which can obtain a main screen antenna and a sub-screen antenna with complementary performance and high isolation in the overlapping position of the main screen part and the sub-screen part when the electronic device such as the mobile phone is in a folded state, and the space utilization rate of the antenna design is high.

[0005] In a first aspect, the present application provides an electronic device, which can include a first device body, a second device body and a hinge, the first device body and the second device body are connected through the hinge, and the electronic device can be folded at the hinge.

[0006] The electronic device can further include a first antenna arranged on the first device body and a second antenna arranged on the second device body, the first antenna and the second antenna at least partially overlap when the electronic device is in a folded state. Wherein,

[0007] The first antenna can include a first conductor in a strip shape and a first feeding point arranged on the first conductor, the first conductor is open at both ends, and the first feeding point is connected to a feed source. The distance from the first feeding point to the middle position of the first conductor can be greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna, or the distance from the first feeding point to the open end of the first conductor can be greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna.

[0008] The second antenna can include a strip-shaped second conductor, a second feeding point and a grounding branch, the second conductor is open at both ends, the second feeding point is connected to the feed source, and the grounding branch is connected to the second conductor at a middle position of the second conductor. A distance from the second feeding point to a connection point of the second conductor and the grounding branch is greater than zero and less than 1 / 8 of a working wavelength of the second antenna, or a distance from the second feeding point to an open end of the second conductor is greater than or equal to zero and less than 1 / 8 of the working wavelength of the second antenna.

[0009] At least partial overlap can include that the first antenna and the second antenna are partially overlapped or completely overlapped in a projection of the first device body or in a projection of the second device body. In other words, the first antenna and the second antenna are partially overlapped or completely overlapped in a projection of the first antenna on the plane of the second device body or in a projection of the second antenna on the plane of the first device body when the electronic device is in the folded state. The overlap does not include overlap caused by the projection and the antenna crossing (for example, perpendicular), but mainly refers to overlap caused by the first conductor and the second conductor being parallel or on the same straight line.

[0010] The connection point of the second conductor and the grounding branch can be any point in the connection region (also referred to as the connection) between the grounding branch and the second conductor, for example, a center point. The first and second feeding points can be any point in the connection region (also referred to as the connection) between the feed line and the conductor, for example, a center point.

[0011] The electronic device provided by implementing the first aspect can have a same direction distribution of current on the first conductor of the first antenna, and can excite a FIGS. 4A-4B The line antenna DM mode shown in the figure, and the polarization direction can be substantially perpendicular to the extension direction of the first conductor. The electronic device provided by implementing the first aspect can have a symmetrical reverse distribution of current on the second conductor of the sub-screen antenna, and can excite a FIGS. 3A-3B The line antenna CM mode shown in the figure, and the polarization direction can be substantially the same as the extension direction of the second conductor. In this way, the polarization directions of the first antenna and the second antenna are orthogonal, and the isolation degree is high. Even if the first antenna and the second antenna are the same frequency, a good isolation degree can be obtained, and the radiation patterns are complementary, which is particularly beneficial to the MIMO antenna design of the electronic device with a folding screen.

[0012] In the first aspect, the first device body and the second device body can be FIGS. 1A-1C The main screen part 11-1 and the sub-screen part 11-3 shown in FIG. 1. The first and second antennas can be FIG. 7A The main and sub-screen antennas shown in FIG. 1. For example, the first conductor can be the conductor 21-A, the first feeding point can be the feeding point 23, the second conductor can be the conductor 21-B, the second feeding point can be the feeding point 24, and the grounding branch can be the grounding branch 25. The first and second antennas can also beFIGS. 8A-8B For example, the first conductor can be the floating metal frame 41-B, the first feed point can be the feed point 33-B, the second conductor can be the floating metal frame 41-A, the second feed point can be the feed point 33-A, and the ground branch can be the ground branch 32.

[0013] In the first aspect, the electronic device can further include a frame of the first device body and a PCB floor of the first device body. The first antenna can be implemented in the electronic device as follows: the first conductor can be a strip conductor arranged on the frame of the first device body, the first conductor can be separated from the PCB floor of the first device body by a first slot (clearance), and the first slot (for example, the slot 31-B in FIG. 3B) can be formed by hollowing out the PCB floor of the first device body, and the first slot can be adjacent to the first conductor. FIG. 8A

[0014] In this case, the frame of the first screen can be a metal frame, and the first conductor can be a section of the metal frame with both ends open, which is formed by opening a gap in the metal frame. The first conductor is not grounded. The length of the first slot is greater than the length of the section of the metal frame (for example, the floating metal frame 41-A), that is, along the extension direction of the metal frame, the gap at both ends of the section of the metal frame, such as the gaps 35-A and 35-B, is crossed to form a slot that is longer than the section of the metal frame, so that the section of the metal frame forms a floating metal frame with both ends open, thereby forming a linear antenna radiator.

[0015] In this case, the frame of the first screen can also be a non-metal frame, and the first conductor can be a section of strip conductor printed or pasted on the inner side of the metal frame.

[0016] In the first aspect, the electronic device can further include a frame of the second device body and a PCB floor of the second device body. The second conductor can be a strip conductor arranged on the frame of the second device body, the second conductor can be separated from the PCB floor of the second device body by a second slot (clearance) and connected by a ground branch, and the second slot (for example, the slot 31-A in FIG. 3A) can be formed by hollowing out the PCB floor of the second device body, and the second slot can be adjacent to the second conductor. FIG. 8A

[0017] In this case, the frame of the second screen can be a metal frame, and the second conductor can be a section of floating metal frame formed by opening a gap in the metal frame. The frame of the second screen can be a non-metal frame, and the second conductor can be a section of strip conductor printed or pasted on the inner side of the metal frame.

[0018] ​​In the first aspect, the ground branch of the second antenna can be a strip-shaped floor portion connecting the second conductor formed by hollowing out the PCB floor of the second device body, or can be a metal wafer connecting the second conductor arranged on the PCB floor of the second device body, or can be a conductive branch extending from the second conductor and connecting the PCB floor.

[0019] The folding screen antenna provided in the first aspect can be further transformed. That is, the second antenna can be transformed from a CM line antenna to an inverted F antenna (IFA) and work in a 1 / 4 wavelength mode. The second antenna transformed into an IFA can include a strip-shaped second conductor, a second feeding point arranged on the second conductor, and a ground branch connecting the second conductor and the ground at one end of the second conductor, and the second feeding point connects a feed source. The distance from the second feeding point to the connection point of the second conductor and the ground branch can be greater than zero and less than 1 / 8 of the working wavelength of the second antenna, or the distance from the second feeding point to the open end of the second conductor can be greater than or equal to zero and less than 1 / 8 of the working wavelength of the second antenna. Wherein, the specific implementation of the second conductor and the ground branch can refer to the foregoing content, which will not be repeated here.

[0020] In the second aspect, the present application provides an electronic device, which can include: the electronic device can include: a first device body, a second device body and a hinge, the first device body and the second device body are connected through the hinge, and the electronic device can be folded at the hinge.

[0021] The electronic device can further include: a first antenna arranged on the first device body and a second antenna arranged on the second device body, the first antenna and the second antenna at least partially overlap when the electronic device is in a folded state, wherein,

[0022] The first antenna can include a strip-shaped first conductor and a first feeding point arranged on the first conductor, the first conductor is open at both ends, and the first feeding point connects a feed source. The distance from the first feeding point to the middle position of the first conductor can be greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna, or the distance from the first feeding point to the open end of the first conductor can be greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna.

[0023] The second antenna can include a second conductor with a first slot, the two ends of the first slot are closed to the ground, and the first side of the first slot is provided with a first slot. The distance from the first slot to the middle position of the first side can be less than 1 / 16 of the working wavelength of the second antenna, the first side of the first slot is provided with a second feeding point, the second feeding point connects a feed source, and the distance from the second feeding point to the first slot can be greater than zero and less than 1 / 8 of the working wavelength of the second antenna.

[0024] At least partial overlap can include that the first antenna and the second antenna are partially or completely overlapped in the projection of the first device body or in the projection of the second device body. In other words, the projection of the first antenna on the plane of the second device body and the projection of the second antenna on the plane of the first device body are partially or completely overlapped when the electronic device is in the folded state. The overlap does not include the overlap of the projection and the antenna due to intersection (for example, perpendicular), but mainly refers to the overlap of the first conductor and the second conductor due to parallel or on a straight line.

[0025] The first feeding point and the second feeding point can be any point in the connection area (also referred to as the connection) between the feed line and the conductor, for example, the center point. The distance from the first slot to the middle of the first side can refer to the distance from the midpoint of the first slot to the midpoint of the first side, or the distance from the two ends of the first slot to the midpoint of the first side. The distance from the second feeding point to the first slot can refer to the distance from the second feeding point to the midpoint of the first slot, or the distance from the second feeding point to the two ends of the first slot.

[0026] The electronic device provided by the second aspect can be implemented, and the first conductor of the first antenna can have a same direction distribution of current, and the first antenna can be excited to have a FIGS. 4A-4B The line antenna DM mode shown in the figure, and the polarization direction can be substantially perpendicular to the extension direction of the first conductor. The second conductor of the sub-screen antenna can have a symmetrical reverse distribution of electric field on the slot, and the sub-screen antenna can be excited to have a FIGS. 5A-5B The slot antenna CM mode shown in the figure, and the polarization direction can be substantially the same as the extension direction of the slot. In this way, the polarization directions of the first antenna and the second antenna are orthogonal, and the isolation degree is high. Even if the first antenna and the second antenna are the same frequency, a good isolation degree can be obtained, and the radiation patterns are complementary, which is especially beneficial to the MIMO antenna design of the electronic device with a folding screen.

[0027] In the second aspect, the first device body and the second device body can be FIGS. 1A-1C The main screen part 11-1 and the sub-screen part 11-3 shown in the figure. The first antenna and the second antenna can be FIG. 7B The main screen antenna and the sub-screen antenna shown in the figure, for example, the first conductor can be the conductor 21-A, the first feeding point can be the feeding point 23, the second conductor can be the conductor 21-C, the first slot can be the slot 26, the second feeding point can be the feeding point 27, and the first slot can be the slot 28. The first antenna and the second antenna can also be FIGS. 11A-11BFor the secondary, primary screen antenna shown in FIG. 1B, for example, the first conductor can be the floating metal frame 61-B, the first feed point can be the feed point 63-B, the second conductor can be the PCB ground plane and the metal frame conductor that enclose the primary screen part of the slot 62-A, the first slot can be the slot 62-A, the second feed point can be the feed point 63-A, and the first slot can be the slot 67.

[0028] In the second aspect, the electronic device can further include: a metal frame of the second device main body and a PCB ground plane of the second device main body. The second conductor can be formed by the metal frame of the second device main body and the PCB ground plane of the second device main body that enclose the first slot (for example, the slot 62-A in FIG. 1B), the first slot can be formed by hollowing out the PCB ground plane of the second device main body, the first slot can be adjacent to the metal frame of the second device main body, and the first slot can be a slot 67 in FIG. 1B. FIG. 11A

[0029] In the second aspect, the electronic device can further include: a metal frame of the second device main body and a PCB ground plane of the second device main body. The second conductor can be formed by the metal frame of the second device main body and the PCB ground plane of the second device main body that enclose the first slot (for example, the slot 62-A in FIG. 1B), the first slot can be formed by hollowing out the PCB ground plane of the second device main body, the first slot can be adjacent to the metal frame of the second device main body, and the first slot can be a slot 67 in FIG. 1B. FIG. 11A

[0030] In the second aspect, the electronic device can further include: a metal frame of the second device main body and a PCB ground plane of the second device main body. The second conductor can be formed by the metal frame of the second device main body and the PCB ground plane of the second device main body that enclose the first slot (for example, the slot 62-A in FIG. 1B), the first slot can be formed by hollowing out the PCB ground plane of the second device main body, the first slot can be adjacent to the metal frame of the second device main body, and the first slot can be a slot 67 in FIG. 1B.

[0031] In the second aspect, the electronic device can further include: a metal frame of the second device main body and a PCB ground plane of the second device main body. The second conductor can be formed by the metal frame of the second device main body and the PCB ground plane of the second device main body that enclose the first slot (for example, the slot 62-A in FIG. 1B), the first slot can be formed by hollowing out the PCB ground plane of the second device main body, the first slot can be adjacent to the metal frame of the second device main body, and the first slot can be a slot 67 in FIG. 1B. FIG. 11A

[0032] In the third aspect, the electronic device can further include: a metal frame of the second device main body and a PCB ground plane of the second device main body. The second conductor can be formed by the metal frame of the second device main body and the PCB ground plane of the second device main body that enclose the first slot (for example, the slot 62-A in FIG. 1B), the first slot can be formed by hollowing out the PCB ground plane of the second device main body, the first slot can be adjacent to the metal frame of the second device main body, and the first slot can be a slot 67 in FIG. 1B. ​​​

[0033] The electronic device can further include a first antenna disposed at the first device body and a second antenna disposed at the second device body, the first antenna and the second antenna at least partially overlapping when the electronic device is in the folded state, wherein,

[0034] The first antenna can include a first conductor in a strip shape and a first feed point and a ground branch disposed on the first conductor, the first conductor being open at both ends, the first feed point being connected to a feed source. The ground branch connects the first conductor to ground at a middle position of the first conductor, a distance from the first feed point to a connection point of the first conductor and the ground branch can be greater than zero and less than 1 / 8 of a working wavelength of the first antenna, or a distance from the first feed point to an open end of the first conductor can be greater than or equal to zero and less than 1 / 8 of the working wavelength of the first antenna.

[0035] The second antenna can include a second conductor having a first slot opened, both ends of the first slot being closed to ground, a first side of the first slot being provided with a second feed point, the second feed point being connected to a feed source. A distance from the second feed point to a middle position of the first side of the first slot can be greater than or equal to zero and less than 1 / 16 of a working wavelength of the second antenna.

[0036] The at least partial overlap can include a projection of the first antenna and the second antenna on a plane in which the first device body is located, or a projection on a plane in which the second device body is located, partially or completely overlapping. In other words, a projection of the first antenna on the plane of the second device body and a projection of the second antenna on the plane of the first device body partially or completely overlap when the electronic device is in the folded state. The overlap does not include overlap due to intersection (e.g., perpendicularity) of the projection and the antenna, but mainly refers to overlap due to parallelism or alignment of the first conductor and the second conductor.

[0037] The connection point of the first conductor and the ground branch can be any point in a connection region (also referred to as a connection) between the ground branch and the first conductor, such as a center point. The first and second feed points can be any point in a connection region (also referred to as a connection) between the feed line and the conductor, such as a center point.

[0038] The electronic device provided by implementing the third aspect can exhibit reverse distribution of current on the first conductor of the first antenna, exciting a FIGS. 3A-3B The linear antenna CM mode shown in the figure, the polarization direction can be substantially the same as the extension direction of the first conductor. The slot of the second conductor of the sub-screen antenna can exhibit co-directional distribution of electric field, exciting a FIGS. 6A-6BThe polarization direction of the slot antenna DM mode shown is substantially perpendicular to the extension direction of the slot. In this way, the polarization directions of the first antenna and the second antenna are orthogonal, and the isolation is high. Even if the first antenna and the second antenna are the same frequency, a good isolation can be obtained, and the radiation patterns are complementary, which is particularly beneficial to the MIMO antenna design of electronic devices with a folding screen.

[0039] In a third aspect, the first device body and the second device body can be FIGS. 1A-1C The main screen part 11-1 and the sub-screen part 11-3 shown in FIG. 1 are examples of the first and second device bodies. The first and second antennas can be FIG. 7C The main screen antenna and the sub-screen antenna shown in FIG. 1 are examples of the first and second antennas. For example, the first conductor can be the conductor 21-B, the first feed point can be the feed point 24, the second conductor can be the conductor 21-D, the first slot can be the slot 32, and the second feed point can be the feed point 31. The first and second antennas can also be FIGS. 10A-10B The main screen antenna and the sub-screen antenna shown in FIG. 1 are examples of the first and second antennas. For example, the first conductor can be the conductor 21-B, the first feed point can be the feed point 24, the second conductor can be the conductor 21-D, the first slot can be the slot 32, and the second feed point can be the feed point 31. The first and second antennas can also be

[0040] In a third aspect, the electronic device can further include a frame of the first device body and a PCB floor of the first device body. The first conductor can be a strip conductor disposed on the frame of the first device body, and the first conductor and the PCB floor of the first device body can be separated by a second slot (clearance) and connected by a ground stub. The second slot (for example, the slot 52-A in FIG. 1) can be formed by hollowing out the PCB floor of the first device body, and the second slot can be adjacent to the first conductor. FIG. 10A

[0041] In this case, the frame of the first screen can be a metal frame, and the first conductor can be a section of the metal frame with both ends open, which is formed by opening a slit in the metal frame. The length of the second slot is greater than the length of the section of the metal frame (for example, the floating metal frame 51-A in FIG. 1), that is, along the extension direction of the metal frame, the slit at both ends of the section of the metal frame, such as the slits 55-A and 55-B, to form a slot that is longer than the section of the metal frame, so that the section of the metal frame forms a floating metal frame with both ends open, thereby forming a linear antenna radiator. FIG. 10A

[0042] In this case, the frame of the first screen can also be a non-metal frame, and the first conductor can be a section of strip conductor printed or pasted on the inner side of the metal frame.

[0043] ​​The ground branch of the first antenna can be a strip-shaped floor part connecting the first conductor formed by hollowing out the PCB floor of the first device main body, or the ground branch can be a metal spring connecting the first conductor arranged on the PCB floor of the first device main body, or the ground branch can be a conductive branch extending from the first conductor and connecting the PCB floor.

[0044] In the third aspect, the electronic device can further include a metal frame of the second device main body and a PCB floor of the second device main body. The second conductor can be composed of the metal frame of the second device main body and the PCB floor of the second device main body surrounding the first slot (for example, the slot 52-B in the first device main body in FIG. 5B), the first slot can be formed by hollowing out the PCB floor of the second device main body, and the first slot can be adjacent to the metal frame of the second device main body. FIG. 10A

[0045] In the fourth aspect, the present application provides an electronic device, which can include a first device main body, a second device main body, and a hinge, the first device main body and the second device main body being connected by the hinge, and the electronic device being foldable at the hinge.

[0046] The electronic device can further include a first antenna arranged on the first device main body and a second antenna arranged on the second device main body, the first antenna and the second antenna at least partially overlapping when the electronic device is in a folded state.

[0047] The first antenna can include a first conductor with a first slot, the two ends of the first slot being closed to ground, and a first gap being arranged on a first side of the first slot. The distance from the first gap to the middle position of the first side can be less than 1 / 16 of the working wavelength of the second antenna, the first side of the first slot is provided with a first feeding point, the first feeding point is connected to a feed source, the distance from the first feeding point to the first gap can be greater than zero and less than 1 / 8 of the working wavelength of the first antenna.

[0048] The second antenna can include a second conductor with a second slot, the two ends of the second slot being closed to ground, and a second feeding point being arranged on a second side of the second slot, the second feeding point being connected to a feed source. The distance from the second feeding point to the middle position of the second side of the second slot can be greater than or equal to zero and less than 1 / 16 of the working wavelength of the second antenna.

[0049] ​At least partial overlap can include that the first antenna and the second antenna are partially or completely overlapped in the projection of the first device body or in the projection of the second device body. In other words, the projection of the first antenna on the plane of the second device body and the projection of the second antenna on the plane of the first device body are partially or completely overlapped when the electronic device is in the folded state. The overlap does not include the overlap of the projection and the antenna due to the intersection (for example, perpendicular), but mainly refers to the overlap of the first conductor and the second conductor due to the parallel or on a straight line.

[0050] The first feeding point and the second feeding point can be any point in the connection area (also referred to as the connection) between the feed line and the conductor, for example, the center point. The distance from the first slot to the middle of the first side can be the distance from the midpoint of the first slot to the midpoint of the first side, or the distance from the two ends of the first slot to the midpoint of the first side. The distance from the second feeding point to the first slot can be the distance from the second feeding point to the midpoint of the first slot, or the distance from the second feeding point to the two ends of the first slot.

[0051] The electronic device provided in the fourth aspect can be implemented, and the slot of the first conductor of the first antenna can present a symmetrically reverse distribution of electric field, and excite FIGS. 5A-5B The slot antenna CM mode shown in the figure, and the polarization direction is basically the same as the extension direction of the slot on the first conductor. The slot of the second conductor of the sub-screen antenna can present a same direction distribution of electric field, and excite FIGS. 6A-6B The slot antenna DM mode shown in the figure, and the polarization direction is basically perpendicular to the extension direction of the slot. In this way, the polarization directions of the first antenna and the second antenna are orthogonal, and the isolation is high. Even if the first antenna and the second antenna are the same frequency, a good isolation can be obtained, and the radiation patterns are complementary, which is especially beneficial to the MIMO antenna design of the electronic device with a folding screen.

[0052] In the fourth aspect, the electronic device can further include a metal frame of the first device body and a PCB ground plate of the first device body. The first conductor includes the metal frame of the first device body and the PCB ground plate of the first device body which form the first slot (for example, the slot 72-A in FIG. 12A The first slot is formed by hollowing the PCB ground plate of the first device body, and the first slot is adjacent to the metal frame of the first device body. No slot is provided on the metal frame of the first device body adjacent to the first slot and forming the first side edge of the first slot.

[0053] In the fourth aspect, the electronic device can further include a metal frame of the second device body and a PCB ground plate of the second device body; and the second conductor includes the metal frame of the second device body and the PCB ground plate of the second device body which form the second slot (for example, the slot 72-B in FIG. 12Athe second device body, the metal frame of the second device body and the PCB floor of the second device body constitute a second slot, the second slot is formed by hollowing out the PCB floor of the second device body, the second slot is adjacent to the metal frame of the second device body, the first slot (for example FIG. 12A The slot 79 in the second device body in the first slot can be a slot opened on the metal frame of the second device body adjacent to the second slot and forming the first side of the first slot. On the metal frame, the first slot is specifically opened on one side of the second feeding point, and the other side of the second feeding point is not opened. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be described below.

[0055] FIGS. 1A-1C is a structural schematic diagram of an electronic device provided by an embodiment of the present application;

[0056] FIGS. 2A-2B is a schematic diagram of the design position of a main and auxiliary screen antenna provided by the present application;

[0057] FIGS. 3A-3B is a principle schematic diagram of a CM line antenna provided by the present application;

[0058] FIGS. 4A-4B is a principle schematic diagram of a DM line antenna provided by the present application;

[0059] FIGS. 5A-5B is a principle schematic diagram of a CM slot antenna provided by the present application;

[0060] FIGS. 6A-6B is a principle schematic diagram of a DM slot antenna provided by the present application;

[0061] FIGS. 7A-7D is a schematic diagram of several main and auxiliary screen antenna design schemes provided by the present application;

[0062] FIGS. 8A-8C is FIG. 7A a schematic diagram of the implementation of the antenna design scheme shown in the electronic device;

[0063] FIGS. 9A-9D is FIG. 7A a schematic diagram of a variant implementation of the antenna design scheme shown in the electronic device;

[0064] FIG. 9E is FIGS. 9A-9D a simulation schematic diagram of the antenna structure shown;

[0065] FIG. 9F is FIG. 7A a schematic diagram of another variant implementation of the antenna design scheme shown in the electronic device;

[0066] FIGS. 9G-9H is FIG. 9F a simulation diagram of the antenna structure shown in FIG. 1;

[0067] FIGS. 10A-10B is FIG. 7B a schematic diagram of the implementation of the antenna design scheme shown in FIG. 2 in an electronic device;

[0068] FIGS. 11A-11B is FIG. 7C a schematic diagram of the implementation of the antenna design scheme shown in FIG. 3 in an electronic device;

[0069] FIGS. 12A-12B is FIG. 7D a schematic diagram of the implementation of the antenna design scheme shown in FIG. 4 in an electronic device;

[0070] FIGS. 13A-13B The feeding position of the CM line antenna and the DM line antenna provided in the application is shown.

[0071] FIGS. 14A-14G The example size and related simulation results that can be used when the main and sub-screen antenna provided in the application is implemented for several typical frequency bands are shown. DETAILED DESCRIPTION

[0072] The embodiments of the application will be described below with reference to the accompanying drawings.

[0073] The technical solutions provided in the application are suitable for electronic devices using one or more of the following communication technologies: global mobile communication (global system for mobile communication, GSM) technology, code division multiple access (code division multiple access, CDMA) communication technology, wideband code division multiple access (wideband code division multiple access, WCDMA) communication technology, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) communication technology, Wi-Fi communication technology, 5G communication technology, millimeter wave (millimeter wave, mmWave) communication technology, SUB-6G communication technology and other future communication technologies. The following embodiments do not highlight the needs of the communication network, and only illustrate the working characteristics of the antenna by the high and low frequency bands. In the present application, the electronic device can be a mobile phone, a tablet computer, a personal digital assistant (personal digital assistant, PDA) and the like.

[0074] FIG. 1A An electronic device based on which the antenna design scheme provided in the application is shown. As shown in FIG. 5, the electronic device includes a main screen 501, a sub-screen 502, a first antenna 503, a second antenna 504, a third antenna 505, a fourth antenna 506, a fifth antenna 507 and a sixth antenna 508.FIG. 1A As shown, the electronic device may include a folding screen 11, a hinge 13, and a frame. The folding screen 11 may include a main screen portion 11-1 and one or more sub-screen portions 11-3. The electronic device can thus be divided into a device body with a main screen (hereinafter referred to as the main screen portion) and a device body with sub-screens (hereinafter referred to as the sub-screen portion). For simplicity, only one sub-screen portion 11-3 is shown in the figures. The hinge 13 connects the first device body and the second device body. The width (w1) of the main screen portion and the width (w2) of the sub-screen portion may be equal or unequal. The frame of the electronic device may include a main screen frame 12-1 and a sub-screen frame 12-3. The main screen frame 12-1 is disposed around the main screen portion 11-1, and the sub-screen frame 12-3 is disposed around the sub-screen portion 11-3. The frame may be a metal frame or a non-metal frame (such as a plastic frame, glass frame, etc.).

[0075] like FIG. 1B As shown, the electronic device can be bent at the hinge 13. Bending can include bending the electronic device outwards or inwards. Bending outwards means that after bending, the folding screen 11 is exposed on the outside, the back cover of the electronic device is exposed on the inside, and the display content on the folding screen 11 is visible to the user. Bending inwards means that after bending, the folding screen 11 is hidden on the inside, the back cover of the electronic device is exposed on the outside, and the display content on the folding screen 11 is not visible to the user. The electronic device has two modes: an open state and a folded state. The open state can refer to the state where the angle α between the main screen and the secondary screen exceeds a first angle (e.g., 120°), and the angle α can even be equal to or close to 180°. The folded state can refer to the state where the angle α between the main screen and the secondary screen is less than a second angle (e.g., 15°), and the angle α can even be equal to or close to 0°. When the folding screen 11 is in the open state, the electronic device can... FIG. 1A As exemplarily shown; when the foldable screen 11 is in the folded state, the electronic device can, as FIG. 1C As shown in the example.

[0076] Electronic devices may also include printed circuit boards (PCBs) and housings (not shown). The housing primarily serves to support the entire device. A metal layer may be disposed on one side of the PCB, formed by etching metal onto the PCB surface. This metal layer can be used to ground the electronic components carried on the PCB, preventing electric shock to the user or damage to the equipment. This metal layer can be referred to as the PCB ground plane, including a main screen PCB ground plane and a secondary screen PCB ground plane. Besides the PCB ground plane, electronic devices may also have other grounding surfaces, such as a metal frame.

[0077] This application provides an antenna design scheme, such as... FIG. 2A As shown, a main screen antenna and a secondary screen antenna are designed in the main screen and secondary screen of the electronic device, respectively, for example, main screen antenna Ant1-1 and secondary screen antenna Ant1-2. The main screen antenna and secondary screen antenna can be antennas in the same frequency band, and when the electronic device is in a folded state, the positions of the main screen antenna and secondary screen antenna will overlap, for example, partially or completely. Here, overlap can mean that the projection of the main screen antenna onto the plane of the secondary screen overlaps with the secondary screen antenna when the electronic device is in a folded state, or that the projection of the secondary screen antenna onto the plane of the main screen overlaps with the main screen antenna. This overlap does not include overlap caused by the projection and antenna crossing (e.g., perpendicularity), but mainly refers to the overlap caused by the radiators of the main screen antenna and secondary screen antenna being parallel or on a straight line. The main screen antenna and the secondary screen antenna can excite two antenna modes with high isolation, such as the common-mode antenna mode and differential-mode antenna mode, which will be introduced later. For example, the polarization direction of the main screen antenna Ant1-1 is the extension direction of the top bezel, while the polarization direction of the secondary screen antenna Ant1-2 is perpendicular to the extension direction of the top bezel. That is, the polarization directions of the main screen antenna Ant1-1 and the secondary screen antenna Ant1-2 are completely or nearly orthogonal. In this way, even if the main screen antenna and the secondary screen antenna are at the same frequency and overlap, they can still achieve good isolation, and their radiation patterns are complementary, which is particularly beneficial for MIMO antenna design in electronic devices with foldable screens. Furthermore, it is not necessary to physically isolate multiple antennas in the same frequency band. For example, the main screen antenna Ant1-1 and the secondary screen antenna Ant1-2 do not need to be physically staggered to obtain two or more antennas at the same frequency with high isolation, making full use of the antenna design space of electronic devices with foldable screens.

[0078] like FIGS. 2A-2B As shown, the electronic device 10 can be designed with two or more pairs of such main screen antennas and secondary screen antennas, which can cover multiple frequency bands and form multiple MIMO antennas of different frequency bands. For example, the main screen antenna Ant1-1 and the secondary screen antenna Ant1-2 can form a Wi-Fi MIMO antenna, the main screen antenna Ant2-1 and the secondary screen antenna Ant2-2 can form a high-frequency (e.g., 3.5GHz) MIMO antenna, and the main screen antenna Ant3-1 and the secondary screen antenna Ant3-2 can form a low-frequency (e.g., 900MHz) MIMO antenna.

[0079] The antenna design scheme provided in this application embodiment can be applied to... FIGS. 1A-1C Examples include mobile phones, tablets, and other electronic devices with foldable screens.

[0080] First, the common-mode antenna mode and differential-mode antenna mode involved in the embodiments of this application will be introduced.

[0081] 1. Common mode (CM) wire antenna mode

[0082] As shown in FIG. 3A , the wire antenna 101 can include two segments of radiators: radiator 101-A and radiator 101-B, which are on the same line and extend in opposite directions. At the two ends of the radiators 101-A and 101-B that are close to each other (e.g., ends 103 and 105), both can be connected to the positive pole of the feed. The phase difference of the radio frequency signals fed into the two segments of radiators is 0°.

[0083] As shown in FIG. 3A , the current at the feeding point is in the same direction, and such feeding can be referred to as common mode feeding. The current on the wire antenna 101 is distributed in opposite directions. Here, the current distributed in opposite directions means that the directions of the main currents excited are substantially opposite, for example FIG. 3A As shown in FIG. 3A , the direction of the main current on the left half of the wire antenna 101 is from right to left, and the direction of the main current on the right half of the wire antenna 101 is from left to right.

[0084] FIG. 3B The radiation pattern of the wire antenna 101 is shown in a simplified manner, and it can be seen that the radiation direction of the wire antenna CM mode is the same as the extension direction of the wire antenna 101, i.e., the polarization direction is the same as the extension direction of the wire antenna 101. Polarization is a radiation characteristic that describes the spatial direction of the electromagnetic wave field strength vector, and the spatial direction of the electric field vector can be taken as the polarization direction of the electromagnetic wave, and the spatial direction of the electric field vector in the maximum radiation direction (main lobe direction) of the antenna can also be taken as the polarization direction. In practical applications, the polarization direction of the wire antenna 101 and the extension direction of the wire antenna 101 can not be exactly the same, and there can be a slight deviation, for example, a deviation within 30°.

[0085] 2. Differential mode (DM) wire antenna mode

[0086] As shown in FIG. 4A , the radiator structure of the wire antenna 101 is the same as the radiator structure of the wire antenna 101 shown in FIG. 3A . The difference is that at the two ends of the radiators 101-A and 101-B that are close to each other (e.g., ends 103 and 105), the positive pole and the negative pole of the feed can be connected, respectively. The phase difference of the radio frequency signals fed into the two segments of radiators is 180°.

[0087] As shown in FIG. 4AAs shown, the currents at the feed points are reversed; this type of feeding can be called differential-mode feeding. The currents on the wire antenna 101 are distributed in the same direction. Here, "currents distributed in the same direction" means that the directions of the main excited currents are essentially the same, for example... FIG. 4A As shown, the main current direction of the linear antenna 101 is from right to left. FIG. 4A The antenna mode excited by the antenna shown can be called the DM mode of the line antenna, and the antenna can be called a DM line antenna. The DM mode of the line antenna can be generated by the entire line antenna 101 operating in 1 / 2 wavelength mode.

[0088] FIG. 4B The simplified illustration shows the radiation mode of the wire antenna 101. It can be seen that the radiation direction of the wire antenna in DM mode is perpendicular to the extension direction of the wire antenna 101, i.e., the polarization direction is perpendicular to the extension direction of the wire antenna 101. In practical applications, the polarization direction and the extension direction of the wire antenna 101 may not be perfectly perpendicular; there may be a slight deviation, such as within 30°, resulting in approximate perpendicularity.

[0089] 3. Common mode (CM) slot antenna mode

[0090] like FIG. 5A As shown, the slot antenna 108 may include a slot 109, with a slot 107 on one side of the slot 109, connecting the slot 109 to external free space. The slot 107 may be specifically located at the middle position on this side. Here, the middle position refers to the midpoint of this side, meaning the location of the slot 107 covers this midpoint. A feed source can be connected to the slot 107; for example, the radiators at both ends of the slot 107 can be connected to the feed source. Specifically, the radiator at one end of the slot 107 is connected to the positive terminal of the feed source, and the radiator at the other end of the slot 107 is connected to the negative terminal of the feed source.

[0091] FIG. 5A The feeding method shown results in the electric field being in the same direction at the feeding point (i.e., at slot 107), which can be called common-mode feeding. The electric field is symmetrically distributed in opposite directions on slot 109. Here, the opposite distribution of the electric field means that the directions of the main excited electric field are basically opposite, for example... FIG. 5A As shown, the direction of the main electric field on the left half of the slot 109 is from top to bottom, and the direction of the main electric field on the right half of the slot 109 is from bottom to top. FIG. 5A The antenna mode excited by the antenna shown can be called the slot antenna CM mode, and the antenna can be called a CM slot antenna. The slot antenna CM mode can be generated by the slot portions on both sides of the slot 107 operating in 1 / 4 wavelength mode.

[0092] FIG. 5BThe simplified illustration shows the radiation mode of the slot antenna 108. It can be seen that the radiation direction of the slot antenna in CM mode is the same as the extension direction of the slot 109, i.e., the polarization direction is parallel to the extension direction of the slot 109. In practical applications, the polarization direction and the extension direction of the slot antenna 108 may not be exactly the same; there may be a slight deviation, such as a deviation within 30°.

[0093] 4. Differential mode (DM) slot antenna mode

[0094] like FIG. 6A As shown, the slot antenna 110 may include a slot 114, which can be formed on a floor, for example, by slotting the floor. A feed can be connected to the middle position of the slot 114; for example, radiators on both sides of the middle position of the slot 114 can be connected to the feed. Here, connecting the feed to the middle position of the slot 114 means that the connection point between the feed line of the feed and one side of the slot 114 (e.g., the side formed by the metal frame) covers the midpoint of that side. Specifically, the middle position of one side of the radiator of the slot 114 can be connected to the positive terminal of the feed, and the middle position of the other side of the radiator of the slot 114 can be connected to the negative terminal of the feed. Here, connecting the positive / negative terminal of the feed to the middle position of the radiator means that the connection point between the positive / negative terminal of the feed and the radiator covers the midpoint of the radiator.

[0095] FIG. 6A The feeding method shown causes the electric field at feed point 112 to reverse; this type of feeding can be called differential-mode feeding. The electric field is symmetrically distributed in the same direction on slot 114. Here, "unidirectional electric field distribution" means that the directions of the excited main electric fields are basically the same, for example... FIG. 6A As shown, the main electric field direction of slot 114 is from top to bottom. FIG. 6A The antenna mode excited by the antenna shown can be called the slot antenna DM mode, and the antenna can be called a DM slot antenna. The slot antenna DM mode can be generated by the entire slot 114 operating in 1 / 2 wavelength mode.

[0096] FIG. 6B The simplified radiation mode of the slot antenna 110 is shown. It can be seen that the radiation direction of the slot antenna in DM mode is perpendicular to the extension direction of the slot 114, that is, the polarization direction is perpendicular to the extension direction of the slot 114. In practical applications, the polarization direction of the slot antenna 110 and the extension direction of the slot 114 may not be completely perpendicular, but may have a slight deviation, such as a deviation within 30°, forming an approximate perpendicularity.

[0097] Among the antennas mentioned above, the common-mode and differential-mode antennas have high isolation because their polarization directions are orthogonal. Here, orthogonality refers to the main lobe directions of the two antennas, i.e., the directions with the highest radiated energy. In practical applications, the polarization directions of the common-mode and differential-mode antennas may not be perfectly orthogonal, exhibiting slight deviations, such as within 30°, resulting in approximate orthogonality.

[0098] Based on the above-mentioned antenna modes, the antenna design scheme provided in the embodiments of this application is described below.

[0099] FIG. 7A An example is shown where the main and secondary screen antennas are DM line antennas and CM line antennas, respectively.

[0100] like FIG. 7A As shown, when the foldable screen of the electronic device is in the folded state, the main and secondary screen antennas overlap, which can be complete or partial. The main screen antenna may include a conductor 21-A and a feed point 23 disposed on the conductor 21-A, which can be connected to a feed source. The conductor 21-A on the main screen can be a section of the main screen's metal frame or a metal strip printed on the inner side of the main screen's frame. The conductor 21-A can exhibit a current distributed in the same direction, exciting the front... FIGS. 4A-4B The diagram shows the DM mode of the wire antenna. The unidirectional current distribution can be the main current distributed on conductor 21-A, which can be generated by the fundamental mode of the main antenna. The sub-antenna may include a conductor 21-B, a feed point 24 disposed on conductor 21-B, and a grounding stub 25. Feed point 24 can be connected to a feed source, and grounding stub 25 can be connected to a ground plane. Conductor 21-B on the sub-antenna can be a section of the sub-antenna's metal frame or a metal strip printed on the inner side of the sub-antenna's frame. A symmetrically opposite current distribution can be present on conductor 21-B, exciting the front... FIGS. 3A-3B The line antenna CM mode is shown. The reverse-distributed current can be the main current distributed on conductor 21-A, which can be generated by the fundamental mode of the main screen antenna.

[0101] Since the main and secondary screen antennas are DM line antennas and CM line antennas respectively, the main and secondary screen antennas can still have good isolation even when the foldable screen of the electronic device is in a folded state, even though they are operating in the same frequency band.

[0102] In addition to the linear antenna CM mode FIG. 7AThe sub-screen antenna can also excite another antenna mode, a line antenna DM mode. The principle is that any conductor of any shape can have multiple characteristic modes, and through feed design, one or several characteristic modes can be enhanced to select the desired characteristic mode. Here, the line antenna DM mode and the line antenna CM mode are the desired characteristic modes selected by the sub-screen antenna through the feed. When the main and sub-screen antennas overlap due to the folding of the folding screen, in order to avoid interference of the line antenna DM mode excited on the sub-screen antenna with the slot antenna DM mode of the main screen antenna, the line antenna DM mode excited on the sub-screen antenna and the slot antenna DM mode of the main screen antenna can be adjusted to different frequency bands.

[0103] FIG. 7A In this case, the main screen antenna can be connected in parallel with an inductor to ground, so that the main screen antenna can be transformed into a CM line antenna, and the main current distribution thereon is a current reverse distribution. At this time, the sub-screen antenna can be connected in series with a capacitor to short the ground branch, so that the sub-screen antenna can be transformed into a DM line antenna, and the main current distribution thereon is a current same direction distribution.

[0104] FIG. 7B An example is shown in which the main and sub-screen antennas are respectively a DM line antenna and a CM slot antenna.

[0105] As shown in FIG. 7B When the folding screen of the electronic device is in a folded state, the main and sub-screen antennas overlap, which can be full or partial overlap. The main screen antenna can include a conductor 21-A and a feed point 23 disposed on the conductor 21-A, and the feed point 23 can be connected to a feed source. The conductor 21-A on the main screen can be a section of the main screen metal frame, or a metal strip printed on the inside of the main screen frame. The conductor 21-A can have a same direction current distribution, for example, a front FIGS. 4A-4B The line antenna DM mode shown. The sub-screen antenna can include a slot 26 formed on a conductor 21-C, for example, formed by slotting on the conductor 21-C, and a slot 28 is provided on one side of the slot 26, which can be specifically provided at the middle position of the side. Here, the middle position refers to the midpoint of the side, that is, the position of the slot 28 covers the midpoint of the side. The conductor 21-C on the sub-screen can be formed by the sub-screen metal frame and the sub-screen PCB floor, for example, the slot 26 in the conductor 21-C is formed on the sub-screen PCB floor. That is, one side of the slot 26 is formed by the sub-screen metal frame, and the other side is formed by the sub-screen PCB floor. A feed point 27 can be provided on the side of the slot 26 where the slot 28 is provided, and the feed point 27 can be connected to a feed source. The slot 26 can have a symmetrical reverse distribution of electric field, and a front FIGS. 5A-5BThe slot antenna CM mode is shown. The reverse distribution of the electric field can be the main electric field distributed in the slot 26, and the electric field can be generated by the base mode of the sub-screen antenna.

[0106] Since the main and sub-screen antennas are DM line antennas and CM slot antennas respectively, in the scenario where the folding screen of the electronic device is in the folded state, the main and sub-screen antennas can also have good isolation when working in the same frequency band.

[0107] FIG. 7C An example shows a scheme in which the main and sub-screen antennas are CM line antennas and DM slot antennas respectively.

[0108] As FIG. 7C shown, when the folding screen of the electronic device is in the folded state, the main and sub-screen antennas overlap, which can be full or partial overlap. The main screen antenna can include a section of conductor 21-B, a feed point 24 disposed on the conductor 21-B, and a ground branch 25, the feed point 24 can be connected to the feed source, and the ground branch 25 can be connected to the ground plate. The conductor 21-B on the main screen can be a section of the main screen metal frame, or a metal strip printed on the inside of the main screen frame. The conductor 21-B can present a symmetric reverse distribution of current, for example, the main screen antenna can excite the line antenna CM mode shown in the front FIGS. 3A-3B The line antenna CM mode is shown. The sub-screen antenna can include a slot 32 formed by slotting the conductor 21-D, for example, the slot 32 is formed by slotting the conductor 21-D, and one side of the slot 32 can be provided with a feed point 31, which can be connected to the feed source. The conductor 21-D on the sub-screen can be formed by the metal frame of the sub-screen and the PCB ground plate of the sub-screen, for example, the slot 32 in the conductor 21-D is formed on the PCB ground plate of the sub-screen. That is, one side of the slot 32 is formed by the metal frame of the sub-screen, and the other side is formed by the PCB ground plate of the sub-screen. The slot 32 can present a co-directional distribution of electric field, and the sub-screen antenna can excite the line antenna CM mode shown in the front FIGS. 6A-6B The slot antenna DM mode is shown. The co-directional distribution of the electric field can be the main electric field distributed in the slot 32, and the electric field can be generated by the base mode of the sub-screen antenna.

[0109] Since the main and sub-screen antennas are CM line antennas and DM slot antennas respectively, in the scenario where the folding screen of the electronic device is in the folded state, the main and sub-screen antennas can also have good isolation when working in the same frequency band.

[0110] In addition to the line antenna CM mode, FIG. 7C The main screen antenna can also excite another antenna mode: line antenna DM mode, as shown. The principle has been introduced before. When the main and sub-screen antennas overlap due to the folding of the folding screen, in order to avoid the line antenna DM mode of the main screen antenna interfering with the slot antenna DM mode of the sub-screen antenna, the line antenna DM mode excited on the main screen antenna and the slot antenna DM mode of the sub-screen antenna can be adjusted to different frequency bands.

[0111] FIG. 7D An example is shown where the main and secondary screen antennas are CM slot antennas and DM slot antennas, respectively.

[0112] like FIG. 7D As shown, when the foldable screen of an electronic device is in a folded state, the main and secondary screen antennas overlap, which can be complete or partial. The main screen antenna may include a slot 26 formed on conductor 21-C, for example, by cutting a slot in conductor 21-C. A gap 28 is provided on one side of the slot 26, and the gap 28 may be specifically located in the middle of that side. Here, the middle position refers to the midpoint of that side, that is, the position of the gap 28 covers the midpoint of that side. A feed point 27 may be provided on the side of the slot 26 with the gap 28, and the feed point 27 can be connected to a feed source. The conductor 21-C on the main screen may be formed by the main screen metal frame and the secondary screen PCB ground plane, for example, by forming the slot 26 in conductor 21-C on the main screen PCB ground plane. That is, one side of the slot 26 is formed by the main screen metal frame, and the other side is formed by the main screen PCB ground plane. A symmetrically opposite electric field may be presented in the slot 26, which excites the front FIGS. 5A-5B The slot antenna CM mode is shown. The reverse-distributed electric field can be the main electric field distributed in slot 26, which can be generated by the fundamental mode of the main screen antenna. The sub-screen antenna may include a slot 32 formed by slotting in conductor 21-D, for example, a slot is formed in conductor 21-D, and a feed point 31 can be provided on one side of slot 32, which can be connected to a feed source. Conductor 21-D on the sub-screen can be formed by the sub-screen metal frame and the sub-screen PCB ground plane, for example, slot 32 is formed in conductor 21-D on the sub-screen PCB ground plane. That is, one side of slot 32 is formed by the sub-screen metal frame, and the other side is formed by the sub-screen PCB ground plane. The slot 32 can present a unidirectional electric field, which excites the front FIGS. 6A-6B The slot antenna shown is in DM mode. The unidirectional electric field can be the dominant electric field distributed in slot 32, which can be generated by the fundamental mode of the sub-screen antenna.

[0113] Since the main and secondary screen antennas are CM slot antennas and DM slot antennas respectively, even when the foldable screen of an electronic device is in a folded state, the main and secondary screen antennas can still have good isolation even when they are operating in the same frequency band.

[0114] above FIGS. 7A-7DIn the schemes shown, the main-screen antenna can be arranged on the main screen, and the secondary-screen antenna can be arranged on the secondary screen. Specifically, the conductors 21-A and 21-B can be a section of floating metal strip, which can be formed by a metal frame, a metal middle frame, or the like of the electronic device. For electronic devices with non-metal industry design (ID), the conductors 21-A and 21-B can be a section of metal strip printed on the inner surface of a non-metal frame, or a section of metal strip printed on the inner surface of a non-metal frame using conductive silver paste. Specifically, the slots 26 and 32 can be formed on the conductors such as the PCB floor or the metal middle frame, for example, by slotting the conductors. The implementation of the main-screen and secondary-screen antennas in the whole machine will be described in detail in the following embodiments, which will not be described here.

[0115] The above FIGS. 7A-7D In the schemes shown, the main-screen and secondary-screen antennas can be exchanged in position, for example, the main-screen antenna in FIG. 7A may be arranged on the secondary screen to become a secondary-screen antenna, and the secondary-screen antenna in FIG. 7A may be arranged on the main screen to become a main-screen antenna.

[0116] The above FIGS. 7A-7D In the schemes shown, when the folding screen of the electronic device is in the folded state, the overlapped main-screen and secondary-screen antennas operating in the same frequency band can also have good isolation, and the radiation patterns are complementary. Thus, two or more same-frequency antennas with high isolation do not have to be obtained by physical position isolation, and the antenna design space of the electronic device with a folding screen can be fully utilized.

[0117] The implementation of the main-screen and secondary-screen antennas in the whole machine will be described in detail in the following embodiments. In the electronic device, the dielectric constant of the material filling the hollow interior formed between the metal frame and the PCB floor and the interior of the slit on the metal frame can be 3.0, and the loss angle can be 0.01.

[0118] Example One

[0119] FIGS. 8A-8B An antenna structure provided by Embodiment One is exemplarily shown. In which, FIG. 8A An antenna structure formed when the folding screen 11 is in the unfolded state is shown, FIG. 8B An antenna structure formed when the folding screen 11 is in the folded state is shown. The antenna structure provided by Embodiment One includes a main-screen antenna and a secondary-screen antenna, wherein the main-screen and secondary-screen antennas can be CM-line antennas and DM-line antennas, respectively.

[0120] As FIG. 8AAs shown, the main screen antenna can be implemented by a hollowed PCB floor and a slit on the metal frame. Specifically, the suspended metal frame 41-A can be formed by a slit, such as the 0.9-2.0 mm wide 35-A, 35-B, on a specific part of the main screen frame 12-1, such as the bottom frame part, and a hollowed PCB floor adjacent to the specific part of the main screen frame 12-1. The hollowed part can form a slot 31-A parallel to the suspended metal frame 41-A, which separates the suspended metal frame 41-A and the PCB floor of the main screen, so that the suspended metal frame 41-A is suspended on the ground, i.e. constitutes a clearance. The length of the slot 31-A is greater than the length of the suspended metal frame 41-A, i.e. along the extension direction of the specific part of the main screen frame 12-1, a longer slot than the suspended metal frame 41-A is formed across the two slits 35-A, 35-B, so that the metal frame between the two slits 35-A, 35-B forms a suspended metal frame, thereby forming a linear antenna radiator. The suspended metal frame 41-A can correspond to the conductor 21-B in FIG. 7A . Moreover, the un-hollowed part 32 can be used to form a ground branch connected to the suspended metal frame 41-A, which can be a strip-shaped floor branch as shown. Without being limited to the strip-shaped floor branch, the ground branch can also be implemented by a metal spring provided on the PCB floor of the main screen part, which can be connected to the suspended metal frame 41-A. The ground branch can also be a metal branch of the metal frame of the main screen part extending to the PCB floor. The specific part of the main screen frame 12-1 can be referred to as a first main screen frame part. FIG. 8A

[0121] FIG. 8A ​The feeding method of the main screen antenna is also shown. A feed point 33-A can be provided on the floating metal frame 41-A to connect the feed line 34-A to the feed source. The feed point 33-A can be located near the grounding point to excite the outgoing antenna in CM mode. The grounding point is the connection between the grounding branch (the uncut part) and the floating metal frame 41-A. The grounding point can be located in the middle of the floating metal frame 41-A, or it can be located near the middle of the floating metal frame 41-A. The grounding point being located in the middle of the floating metal frame 41-A can mean that the grounding point is located at the midpoint of the floating metal frame 41-A, that is, the connection between the grounding branch and the floating metal frame 41-A covers the midpoint. "Near" can mean that the distance from the grounding point to the midpoint is not more than 1 / 8 of the operating wavelength. Not limited to being located near the grounding point, the feed point 33-A can also be located near the open end of the floating metal frame 41-A. Here, "near the grounding point" for feed point 33-A can mean that the distance from feed point 33-A to the grounding point is greater than 0 and less than 1 / 8 of the operating wavelength. "Near the open end of the floating metal frame 41-A" for feed point 33-A can mean that the distance from feed point 33-A to the open end is not far from 1 / 8 of the operating wavelength, and can even be equal to 0. The operating wavelength refers to the operating wavelength of the main screen antenna in CM mode (linear antenna). The calculation method for the operating wavelength will be explained later and will not be elaborated here.

[0122] It should be understood that the midpoint of the suspended metal frame 41-A can be considered as the midpoint of the length of the suspended metal frame 41-A, which can be considered as the electrical length. Electrical length can be expressed as the ratio of the physical length (i.e., mechanical or geometric length) multiplied by the transmission time of an electrical or electromagnetic signal in the medium to the time required for this signal to travel a distance equal to the physical length of the medium in free space. Electrical length can satisfy the following formula:

[0123]

[0124] Where L is the physical length, a is the transmission time of the electrical or electromagnetic signal in the medium, and b is the transmission time in free space;

[0125] Alternatively, electrical length can also refer to the ratio of physical length (i.e., mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave, and electrical length can satisfy the following formula:

[0126]

[0127] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0128] Similarly, such as FIG. 8AAs shown, the sub-screen antenna can also be realized by a hollowed PCB floor and a slit on the metal frame. Specifically, the suspended metal frame 41-B can be formed by a slit, such as the two slits 36-A, 36-B on a specific portion of the sub-screen frame 12-3 (e.g., the bottom frame portion), and a hollowed PCB floor adjacent to the specific portion of the sub-screen frame 12-3. The hollowed portion can form a slot 31-B parallel to the suspended metal frame 41-B, which separates the suspended metal frame 41-B from the PCB floor of the sub-screen and suspends the suspended metal frame 41-B from the ground, i.e., forms a clearance. The length of the slot 31-B is greater than that of the suspended metal frame 41-B, i.e., along the extension direction of the specific portion of the sub-screen frame 12-3, the slot 31-B extends beyond the two slits 36-A, 36-B to form a longer slot compared to the suspended metal frame 41-B, so that the metal frame between the two slits 36-A, 36-B forms a suspended metal frame, thereby forming a linear antenna radiator. The suspended metal frame 41-B can correspond to the conductor 21-A in FIG. 7A Unlike the main-screen antenna, the suspended metal frame 41-B of the sub-screen antenna does not have a ground branch and does not have a structure such as the un-hollowed portion 32 in the main-screen antenna. The specific portion of the sub-screen frame 12-1 can be referred to as a first sub-screen frame portion.

[0129] FIG. 8A A feeding method of the sub-screen antenna is also shown. The suspended metal frame 41-B can be provided with a feeding point 33-B to connect a feeding line 34-B to a feed source. The feeding point 33-B can be disposed adjacent to a middle position of the suspended metal frame 41-B, which can be referred to as middle offset feeding, to excite a linear antenna DM mode. The feeding point 33-B disposed at the middle position of the suspended metal frame 41-B can mean that the feeding point 33-B is disposed at the midpoint of the suspended metal frame 41-B, i.e., the connection of the feeding line 34-B and the suspended metal frame 41-B covers the midpoint. The feeding point 33-B can also be disposed adjacent to an open end of the suspended metal frame 41-B. Here, adjacent can mean that the distance from the feeding point 33-B to the middle position of the suspended metal frame 41-B is less than 1 / 16 of the operating wavelength, or the distance from the feeding point 33-B to the open end of the suspended metal frame 41-B is less than 1 / 16 of the operating wavelength, and the adjacent can also include the case where the distance is equal to 0. The operating wavelength refers to the operating wavelength of the linear antenna DM mode of the sub-screen antenna.

[0130] FIG. 8A The main-screen antenna and the sub-screen antenna in FIG. 3A i.e., the current distribution on the suspended metal frame 41-A is symmetrically and oppositely distributed. The current distribution on the sub-screen antenna can refer to FIG. 4A, i.e. in the same direction on the floating metal frame 41-B. In addition, the main and auxiliary screen antennas can also excite the floor to generate FIG. 8C the current distribution shown. The radiation direction of the main screen antenna can refer to FIG. 3B , i.e. along the direction of the floating metal frame 41-A. The radiation direction of the auxiliary screen antenna can refer to FIG. 4B , i.e. perpendicular to the direction of the floating metal frame 41-B.

[0131] FIG. 8B An exemplary position relationship between the main screen antenna and the auxiliary screen antenna when the folding screen 11 is in the folded state is shown. When the folding screen 11 is in the folded state, the position of the main screen antenna and the position of the auxiliary screen antenna overlap. For example, the position of the main screen antenna is the position of the main screen frame portion (i.e. the first main screen frame portion) forming the floating metal frame 41-A, and the position of the auxiliary screen antenna is the position of the auxiliary screen frame portion (i.e. the first auxiliary screen frame portion) forming the floating metal frame 41-B. This overlap does not affect the performance of the main screen antenna and the auxiliary screen antenna because the main and auxiliary screen antennas are respectively CM line antennas and DM line antennas with orthogonal radiation directions, i.e. even if they work in the same frequency band (for example, B1 frequency band, B3 frequency band, B7 frequency band, N77 frequency band, or for example, 3.6GHz-4.1GHz, etc.), they can have good isolation. In this way, two same-frequency-band antennas can be obtained in the overlapping area of the main and auxiliary screens, and the patterns are complementary.

[0132] The folding screen antenna provided in Embodiment One can be further deformed as FIGS. 9A-9B shown, i.e. the main screen antenna can be deformed from a CM line antenna to an inverted F antenna (IFA) working in a 1 / 4 wavelength mode. FIG. 9C The current distribution excited by the main screen IFA line antenna and the auxiliary screen DM line antenna is shown. The distribution of the floor current excited by the main screen IFA line antenna conforms to the distribution of the floor current of the CM line antenna, which makes the radiation direction of the main screen IFA line antenna basically the same as the radiation direction of the CM line antenna, and orthogonal to the radiation direction of the auxiliary screen DM line antenna. Simulation experiments show that the maximum radiation directions of the patterns of the main screen IFA line antenna and the auxiliary screen DM line antenna are orthogonal, so that these two antennas can obtain high isolation even if they work in the same frequency band when the folding screen 11 is in the folded state. FIGS. 9A-9B The simplified structure of the antenna in the folded state can be as shown in FIG. 9D For example, the main screen antenna can be an antenna working in the N77 frequency band (for example, 3.6GHz-4.1GHz) in a 1 / 4 wavelength mode, and the auxiliary screen antenna can also be an antenna working in the N77 frequency band in a 1 / 2 wavelength mode. As can be seen from FIG. 9E , good isolation can be obtained between the main screen N77 antenna and the auxiliary screen N77 antenna.

[0133] To cover more frequency bands, multiple main screen antennas can be designed at the locations overlapping with the secondary screen DM line antenna. For example, multiple main screen IFA antennas can be designed, which may include IFA antennas operating in the same frequency band as the secondary screen DM line antenna, or they may include IFA antennas operating in different frequency bands. For example, ... FIG. 9F As shown, two IFA antennas can be set on the main screen: one can be an N77 band antenna, and the other can be a mid-high band (MHB) antenna. From FIGS. 9G-9H It can be seen that the foldable screen is in a folded state. FIG. 9F The individual antennas in the antenna shown have minimal mutual interference, and the radiation efficiency and system efficiency remain high.

[0134] When the main screen antenna is transformed from a CM line antenna to an inverted F antenna, the secondary screen antenna can also be a DM slot antenna, achieving high isolation even when the main and secondary screen antennas overlap. The specific implementation of the DM slot antenna in the overall system can be found in subsequent articles. FIGS. 10A-10B Implementation examples FIGS. 12A-12B The DM slot antenna in the embodiment.

[0135] Example Two

[0136] FIGS. 10A-10B An antenna structure provided in Embodiment 2 is illustrated as an example. FIG. 10A The antenna structure formed when the folding screen 11 is in the unfolded state is shown. FIG. 10B The antenna structure formed when the foldable screen 11 is in the folded state is shown. The antenna structure provided in Embodiment 2 includes a main screen antenna and a sub-screen antenna, wherein the main screen antenna and the sub-screen antenna can be a CM line antenna and a DM slot antenna, respectively.

[0137] like FIG. 10A As shown, the main screen antenna in Embodiment 2 and FIG. 8A The antenna shown is the same as the main screen antenna, and can be achieved by creating a perforated PCB floor and a gap in the metal frame. For details, please refer to [reference needed]. FIG. 8A The relevant descriptions will not be repeated here.

[0138] like FIG. 10A As shown, the secondary screen antenna can be implemented by perforating the PCB ground plane. Specifically, a specific portion of the PCB ground plane adjacent to the secondary screen metal frame 12-3 (e.g., the bottom frame portion) can be perforated. The perforated PCB ground plane of the secondary screen portion and this specific portion of the secondary screen metal frame 12-3 are then combined to form a slot 52-B. The slot 52-B is closed at both ends (can be referred to as the closed end), with one side of the slot 52-B being the secondary screen metal frame 12-3 and the other side being the PCB ground plane of the secondary screen portion. The slot 52-B is... FIG. 7Cthe slot 32 in FIG. 1. FIG. 10A The feeding method of the sub-screen antenna is also shown. A feeding point 53-B can be provided on the side of the metal frame of the slot 52-B (such as the metal frame 51-B) to connect the feeding line 54-B to the feed source, and the side of the slot 52-B where the feeding point is provided is not provided with a slot. The feeding point 53-B can be provided adjacent to the middle position of the metal frame 51-B to excite the DM mode of the slot antenna. The feeding point 53-B can also be provided adjacent to the closed end of the slot 52-B, which is not limited to being provided adjacent to the middle position. Here, adjacent can mean that the distance from the feeding point 53-B to the middle position or the closed end is less than 1 / 16 of the working wavelength, and the adjacent can also include the case where the distance is equal to 0.

[0139] Here, the feeding point 53-B provided at the middle position of the floating metal frame 51-B (the case where the distance is equal to 0) can mean that the feeding point 53-B is provided at the midpoint of the floating metal frame 51-B, that is, the connection between the feeding line 54-B and the floating metal frame 51-B covers the midpoint.

[0140] FIG. 10A The main screen antenna and the sub-screen antenna in FIG. 1 can be antennas working in the same frequency band. The current distribution on the main screen antenna can refer to FIG. 3A , that is, symmetrically and oppositely distributed on the floating metal frame 51-A. The electric field distribution on the sub-screen antenna can refer to FIG. 6A , that is, the same direction distribution in the slot 52-B. The radiation direction of the main screen antenna can refer to FIG. 3B , that is, radiating along the direction of the floating metal frame 41-A. The radiation direction of the sub-screen antenna can refer to FIG. 6B , that is, radiating perpendicular to the direction of the slot 52-B.

[0141] FIG. 10B The positional relationship between the main screen antenna and the sub-screen antenna when the folding screen 11 is in the folded state is exemplarily shown. When the folding screen 11 is in the folded state, the position of the main screen antenna and the position of the sub-screen antenna overlap. This overlap does not affect the performance of the main screen antenna and the sub-screen antenna, because the main screen antenna and the sub-screen antenna are respectively CM linear antenna and DM slot antenna with orthogonal radiation directions, and can have good isolation even if they work in the same frequency band. In this way, two antennas in the same frequency band can be obtained in the overlapping area of the main screen and the sub-screen, and the patterns are complementary.

[0142] Example Three

[0143] FIGS. 11A-11B The antenna structure provided by the third embodiment is exemplarily shown. Among them, FIG. 11A The antenna structure formed when the folding screen 11 is in the unfolded state is shown, FIG. 11BThe antenna structure formed when the folding screen 11 is in the folded state is shown. The antenna structure provided in Embodiment Three includes a main screen antenna and a secondary screen antenna, wherein the main and secondary screen antennas can be CM slot antennas and DM line antennas respectively.

[0144] As shown in FIG. 11A , the main screen antenna can be implemented by hollowing out the PCB floor and opening a slot in the metal frame. Specifically, the PCB floor adjacent to a specific part (for example, the bottom frame part) of the main screen metal frame 12-1 can be hollowed out, and the slot 62-A can be formed by the hollowed-out PCB floor of the main screen part and the main screen metal frame 12-1. The slot 62-A is closed at both ends, and one side of the slot 62-B is the main screen metal frame 12-1, and the other side is the PCB floor of the main screen part. Moreover, a slot, such as slot 67, can be opened in the metal frame on one side of the slot 62-A to connect the slot 62-A to the external free space. The slot 62-A is the slot 26 in FIG. 7B , and the slot 67 is the slot 28 in FIG. 7B . The slot 67 can be opened in the middle position of the metal frame on one side of the slot 62-A. The middle position refers to the midpoint of the side of the slot 62-A, that is, the position of the slot 67 covers the midpoint.

[0145] FIG. 11A The feeding mode of the main screen antenna is also shown. A feeding point 63-A can be provided on the side of the metal frame of the slot 62-A to connect a feeding line 64-A to a feed source. The feeding point 63-A can be provided adjacent to the slot 67 to excite a line antenna CM mode. The feeding point 63-A can also be provided adjacent to the closed end of the slot 62-A, without being limited to being adjacent to the slot 67. Here, the feeding point 63-A adjacent to the slot 67 can mean that the distance from the feeding point 63-A to the slot 67 is greater than 0 and less than 1 / 8 of the working wavelength. The feeding point 63-A adjacent to the closed end of the slot 62-A can mean that the distance from the feeding point 63-A to the closed end is less than 1 / 8 of the working wavelength, and the adjacent position can also include the case where the distance is equal to 0. The working wavelength refers to the working wavelength of the slot antenna CM mode of the main screen antenna, and the calculation method of the working wavelength will be introduced later, which will not be expanded here.

[0146] Here, the distance from the feeding point 63-A to the slot 67 can mean the distance from the feeding point 63-A to the midpoint of the slot 67, or the distance from the feeding point 63-A to both ends of the slot 67.

[0147] As shown in FIG. 11A , the secondary screen antenna in Embodiment Three is the same as the secondary screen antenna shown in FIG. 8A , and can be implemented by hollowing out the PCB floor and opening a slot in the metal frame. For details, reference can be made to the related description of the secondary screen antenna in FIG. 8A , which will not be repeated here.

[0148] FIG. 11A The main screen antenna and the secondary screen antenna can both operate in the same frequency band. The electric field distribution on the main screen antenna can be referenced... FIG. 7B That is, the current distribution is symmetrical and opposite on slot 62-A. The current distribution on the secondary screen antenna can be referenced... FIG. 7B That is, they are distributed in the same direction on the suspended metal frame 61-B. The radiation direction of the main screen antenna can be referenced. FIG. 5B That is, it radiates along the direction of slot 62-A. The radiation direction of the secondary screen antenna can be referenced. FIG. 4B That is, it radiates in a direction perpendicular to the suspended metal frame 61-B.

[0149] FIG. 11B The diagram illustrates the positional relationship between the main screen antenna and the secondary screen antenna when the foldable screen 11 is in a folded state. When the foldable screen 11 is folded, the positions of the main screen antenna and the secondary screen antenna overlap. This overlap does not affect the performance of the main screen antenna and the secondary screen antenna because the main screen antenna and the secondary screen antenna are CM slot antenna and DM line antenna with orthogonal radiation directions, respectively, and can maintain good isolation even when operating in the same frequency band. Thus, two antennas operating in the same frequency band with complementary radiation patterns can be obtained in the overlapping area of ​​the main and secondary screens.

[0150] Example Four

[0151] FIGS. 12A-12B An antenna structure provided in Embodiment 4 is illustrated as an example. FIG. 12A The antenna structure formed when the folding screen 11 is in the unfolded state is shown. FIG. 12B The antenna structure formed when the foldable screen 11 is in the folded state is shown. The antenna structure provided in Embodiment 4 includes a main screen antenna and a sub-screen antenna, wherein the main screen antenna and the sub-screen antenna can be a CM slot antenna and a DM slot antenna, respectively.

[0152] like FIG. 12A As shown, the main screen antenna in Embodiment 4 and FIG. 11A The antenna shown is the same as the main screen antenna, and can be achieved by creating a perforated PCB floor and a gap in the metal frame. For details, please refer to [reference needed]. FIG. 11A The relevant explanations regarding the CM slot antenna in the main screen will not be repeated here.

[0153] like FIG. 12A As shown, the secondary screen antenna in Embodiment 4 and FIG. 10A The secondary screen antenna shown is the same and can be implemented by creating a perforated PCB floor and a gap in the metal frame. For details, please refer to [reference needed]. FIG. 10A The relevant explanations regarding the DM slot antenna in the secondary screen will not be repeated here.

[0154] FIG. 12AThe main panel antenna and the sub panel antenna in the folding screen can be antennas working in the same frequency band. The electric field distribution on the main panel antenna can refer to FIG. 7D , that is, symmetrically and reversely distributed on the slot 72-A. The current distribution on the sub panel antenna can refer to FIG. 7D , that is, symmetrically and reversely distributed on the slot 72-A. The radiation direction of the main panel antenna can refer to FIG. 5B , that is, radiate along the direction of the slot 72-A. The radiation direction of the sub panel antenna can refer to FIG. 6B , that is, radiate perpendicular to the direction of the slot 72-A.

[0155] FIG. 12B The exemplary shows the positional relationship between the main panel antenna and the sub panel antenna when the folding screen 11 is in the folded state. When the folding screen 11 is in the folded state, the position of the main panel antenna and the position of the sub panel antenna overlap. This overlap does not affect the performance of the main panel antenna and the sub panel antenna because the main panel antenna and the sub panel antenna are respectively CM slot antennas and DM slot antennas with orthogonal radiation directions, and even if they work in the same frequency band, they can have good isolation. In this way, two same-frequency antennas can be obtained in the overlapping area of the main panel and the sub panel, and the patterns are complementary.

[0156] The folding screen antenna provided by the above embodiment can realize a same-frequency antenna with good performance when arranged at the overlapping position of the folding screen in the folded state, and thus the spatial utilization rate of the main panel and the sub panel in the folding screen antenna design can be improved, the number of antennas can be expanded to more, and this is especially beneficial to MIMO antenna design.

[0157] FIGS. 13A-13B The feeding position of the antenna structure provided by the embodiment of the application is shown.

[0158] As shown in FIG. 13A , the feeding position of the DM line antenna can be arranged adjacent to the middle position of the radiator. The feeding position can also be arranged adjacent to the open end of the radiator without being limited to being arranged adjacent to the middle position. Adjacent can mean that the distance from the feeding point to the middle position or the open end of the radiator is less than a first distance value, for example, 1 / 16 of the working wavelength, that is, the distance is greater than 0 and less than 1 / 16 of the working wavelength, and the adjacent can include the case that the distance is equal to 0. Here, the working wavelength refers to the working wavelength of the DM mode of the line antenna. The positional relationship between the feeding position of the DM slot antenna and the slot body can refer to FIG. 13A The slot body can be regarded as the radiator of the slot antenna, and the feeding position can be arranged adjacent to the middle position of the slot body or adjacent to the closed end of the slot body. The slot body can be formed by surrounding the metal frame and the PCB floor through the hollowed PCB floor as described in the foregoing embodiments.

[0159] As shown in FIG. 13BAs shown, the feed position of the CM line antenna can be arranged adjacent to the grounding point (the connection point of the grounding branch and the radiator) of the radiator. The feed position can also be arranged adjacent to the open end of the radiator, without being limited to being arranged adjacent to the grounding point. Here, the feed point being adjacent to the grounding point can mean that the distance from the feed point to the grounding point is less than a second distance value, for example, the second distance value is 1 / 8 of the operating wavelength, i.e., the distance is greater than 0 and less than 1 / 8 of the operating wavelength. The feed point being adjacent to the open end can mean that the distance from the feed point to the open end is not far from 1 / 8 of the operating wavelength, and the adjacency can include the case that the distance is equal to 0. The operating wavelength refers to the operating wavelength of the CM mode of the line antenna. The positional relationship of the feed position of the CM slot antenna with respect to the slot body can be referred to FIG. 13B The slot body can be regarded as the radiator of the slot antenna, and the feed position can be arranged adjacent to the open slot on one side of the slot body or adjacent to the closed end of the slot body.

[0160] FIGS. 14A-14G The size design of the antenna structure provided in the embodiments of the present application when implemented as antennas of several typical frequency bands is shown.

[0161] As shown in FIG. 14A , the main screen antenna and the auxiliary screen antenna can both be N77 frequency band antennas, and the lengths of the radiators of the two can be about 13 mm, but are not limited to this length, and the main screen N77 antenna and the auxiliary screen N77 antenna can also adjust the lengths of the radiators through tuning switches. FIG. 14A The isolation of the main screen antenna and the auxiliary screen antenna of the antenna structure shown in

[0162] As shown in FIG. 14B , the length of one half of the radiator of the main screen antenna can be about 24 mm, and the length from the feed point to the open end can be about 6 mm, i.e., the main screen antenna can change the size to work in the medium-high frequency MHB frequency band and the B1 / B3 frequency band, but is not limited to this length, and the main screen antenna can also adjust the length of the radiator through a tuning switch. FIG. 14C It is shown that FIG. 14B the main screen antenna of the antenna structure shown in

[0163] As shown in FIG. 14D , the length of one half of the radiator of the main screen antenna can be about 18 mm, and the length from the feed point to the open end can be 6 mm, i.e., the main screen antenna can change the size to work in the medium-high frequency MHB frequency band and the B7 frequency band, but is not limited to this length, and the main screen antenna can also adjust the length of the radiator through a tuning switch. FIG. 14E It is shown that FIG. 14D the main screen antenna of the antenna structure shown in

[0164] As shown in FIG. 14FAs shown, the half length of the radiator of the main screen antenna can be about 11 mm, and the length from the feed point to the open end can be 4 mm, that is, the main screen antenna can change the size to work in the MHB frequency band and the N77 frequency band, but is not limited to this length, and the main screen antenna can also adjust the antenna radiation length through the tuning switch. FIG. 14G The main screen antenna is shown FIG. 14F to resonate in the MHB frequency band and the N77 frequency band.

[0165] Not limited to FIGS. 14A-14G The main and auxiliary screen antennas provided by the embodiments of the present application can also work in other frequency bands. In the present application, the working wavelength in a certain wavelength mode (such as a half-wavelength mode) of the antenna can refer to the wavelength of the signal radiated by the antenna. For example, the half-wavelength mode of the floating metal antenna can produce resonance in the 1.575 GHz frequency band, and the working wavelength in the half-wavelength mode refers to the wavelength of the signal radiated by the antenna in the 1.575 GHz frequency band. It should be understood that the wavelength of the radiated signal in the air can be calculated as follows: wavelength = speed of light / frequency, where the frequency is the frequency of the radiated signal. The wavelength of the radiated signal in the medium can be calculated as follows: where ε is the relative permittivity of the medium, and the frequency is the frequency of the radiated signal. The slots and grooves in the above embodiments can be filled with insulating media.

[0166] The 1 / 16 of the working wavelength and the 1 / 8 of the working wavelength mentioned in the above embodiments can refer to the wavelength corresponding to the center frequency of the resonance frequency. For example, assuming that the center frequency of the B1 uplink frequency band (resonance frequency of 1920 MHz to 1980 MHz) is 1955 MHz, the working wavelength can be the wavelength calculated using the frequency of 1955 MHz. Not limited to the center frequency, the "working wavelength" can also refer to the wavelength corresponding to a non-center frequency of the resonance frequency.

[0167] The "adjacent" mentioned in the above embodiments is constrained by taking 1 / 16 of the working wavelength and 1 / 8 of the working wavelength as the critical value, but these two values are only used for example, and the distance between the feed point or the ground branch and the position (such as the middle position of the radiator or the open end) is not more than a certain distance value, so as to constrain the "adjacent" position relationship, and the examples in the above embodiments can be used as an implementation manner.

[0168] The open end and the closed end mentioned in the above embodiments are, for example, relative to the ground, the closed end is grounded, and the open end is not grounded, or, for example, relative to other conductive bodies, the closed end is electrically connected to other conductive bodies, and the open end is not electrically connected to other conductive bodies.

[0169] In addition, the above-mentioned intermediate or intermediate position and the like in the present application are relative to the current process level, and are not strictly defined in the mathematical sense. For example, the intermediate position of the conductor refers to the midpoint of the conductor, and in practical application, the connection of other components (such as a feeder, a grounding branch) to the conductor covers the midpoint. The intermediate position of the slot or the intermediate position of one side of the slot refers to the midpoint of one side of the slot, and in practical application, the connection of other components (such as a feeder) to the side covers the midpoint. The intermediate position of one side of the slot is provided with a slot, and in practical application, the slot covers the midpoint of the side.

[0170] The above-mentioned feeding point in the present application can refer to any point in the connection area (also referred to as the connection) of the feeder and the conductor, such as the center point. The distance from the point (such as the feeding point, the connection point, the grounding point) to the slot or the distance from the slot to the point can refer to the distance from the point to the midpoint of the slot, or the distance from the point to both ends of the slot.

[0171] The above-mentioned current co-directional / reversal distribution in the present application should be understood as the direction of the main current on the same side of the conductor being co-directional / reversal. For example, when co-directional distribution current (for example, the current path is also annular) is excited on the annular conductor, it should be understood that the main current excited on the conductors on both sides of the annular conductor (for example, the conductors around a slot, the conductors on both sides of the slot) is opposite in direction, but still belongs to the definition of co-directional distribution current in the present application.

[0172] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electronic device, comprising: The electronic device comprises: a first device body, a second device body and a hinge, the first device body and the second device body being connected through the hinge; the electronic device can be folded at the hinge; the electronic device further comprises a first antenna arranged on the first device body and a second antenna arranged on the second device body, wherein the first antenna comprises a first conductor in a strip shape and a first feeding point arranged on the first conductor, the first conductor being open at both ends, the distance from the first feeding point to the middle position of the first conductor being greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna, or the distance from the first feeding point to one open end of the first conductor being greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna; the second antenna comprises a second conductor in a strip shape, a second feeding point arranged on the second conductor and a grounding branch, the second conductor being open at both ends, the second conductor being grounded at the middle position thereof through the grounding branch, the distance from the second feeding point to the connection point of the second conductor and the grounding branch being greater than zero and less than 1 / 8 of the working wavelength of the second antenna, or the distance from the second feeding point to one open end of the second conductor being greater than or equal to zero and less than 1 / 8 of the working wavelength of the second antenna, wherein the first conductor and the second conductor at least partially overlap when the electronic device is in a folded state.

2. An electronic device, comprising: The electronic device comprises: a first device body, a second device body and a hinge, the first device body and the second device body being connected through the hinge; the electronic device can be folded at the hinge; the electronic device further comprises a first antenna arranged on the first device body and a second antenna arranged on the second device body, wherein the first antenna comprises a first conductor in a strip shape and a first feeding point arranged on the first conductor, the first conductor being open at both ends, the distance from the first feeding point to the middle position of the first conductor being greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna, or the distance from the first feeding point to one open end of the first conductor being greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna; the second antenna is an inverted F antenna, comprising a second conductor in a strip shape, a second feeding point arranged on the second conductor and a grounding branch, one end of the second conductor being open, the other end of the second conductor being grounded through the grounding branch, the distance from the second feeding point to the connection point of the second conductor and the grounding branch being greater than zero and less than 1 / 8 of the working wavelength of the second antenna, or the distance from the second feeding point to one open end of the second conductor being greater than or equal to zero and less than 1 / 8 of the working wavelength of the second antenna, wherein the first conductor and the second conductor at least partially overlap when the electronic device is in a folded state.

3. The electronic device of any of claims 1-2, wherein, The working frequency bands of the first antenna and the second antenna comprise the same frequency band. The working frequency bands of the first antenna and the second antenna comprise the same frequency band.

4. The electronic device of any of claims 1-3, wherein, The first conductor and the second conductor at least partially overlap when the electronic device is in the folded state includes that the projections of the first conductor and the second conductor on the plane where the first device body is located, or on the plane where the second device body is located, partially or completely overlap.

5. The electronic device of any of claims 1-4, wherein, The electronic device further comprises a frame of the first device body and a floor of the first device body; the first conductor is a strip-shaped conductor arranged on the frame of the first device body, and the first conductor is separated from the floor of the first device body by a first slot, the first slot is formed by hollowing out the floor of the first device body, and the first slot is adjacent to the first conductor; the first conductor is not grounded.

6. The electronic device of any of claims 1-5, wherein, The electronic device further comprises a frame of the second device body and a floor of the second device body; the second conductor is a strip-shaped conductor arranged on the frame of the second device body, and the second conductor is separated from the floor of the second device body by a second slot and connected by the grounding branch, the second slot is formed by hollowing out the floor of the second device body, and the second slot is adjacent to the second conductor.

7. The electronic device of claim 6, wherein, The grounding branch is a strip-shaped floor part connecting the second conductor formed by hollowing out the floor of the second device body, or the grounding branch is a metal spring connecting the second conductor arranged on the floor of the second device body, or the grounding branch is a conductive branch of the second conductor extending out of the floor.

8. An electronic device, comprising: Comprise: A first device body, a second device body and a hinge, the first device body and the second device body are connected by the hinge; The electronic device can be folded at the hinge; The electronic device further comprises a first antenna arranged on the first device body and a second antenna arranged on the second device body, wherein The first antenna comprises a strip-shaped first conductor and a first feed point arranged on the first conductor, the first conductor is open at both ends, the distance from the first feed point to the middle position of the first conductor is greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna, or the distance from the first feed point to one open end of the first conductor is greater than or equal to zero and less than 1 / 16 of the working wavelength of the first antenna; The second antenna comprises a second conductor with a first slot, the two ends of the first slot are closed and grounded, the first side of the first slot is provided with a first slot, the distance from the first slot to the middle position of the first side is less than 1 / 16 of the working wavelength of the second antenna, the first side of the first slot is provided with a second feed point, the distance from the second feed point to the first slot is greater than zero and less than 1 / 8 of the working wavelength of the second antenna, wherein the first conductor and the second conductor at least partially overlap when the electronic device is in the folded state.

9. The electronic device of claim 8, wherein, The working frequency bands of the first antenna and the second antenna include the same frequency band.

10. The electronic device of claim 8 or 9, wherein, The first conductor and the second conductor at least partially overlap when the electronic device is in the folded state includes that the projection of the first conductor and the second conductor on the plane where the first device body is located, or on the plane where the second device body is located, partially or completely overlaps.

11. The electronic device of any of claims 8-10, wherein, The electronic device further comprises a frame of the first device body and a floor of the first device body; the first conductor is a strip-shaped conductor arranged on the frame of the first device body, and the first conductor is separated from the floor of the first device body by a second slot, the second slot is formed by hollowing out the floor of the first device body, and the second slot is adjacent to the first conductor; the first conductor is not grounded.

12. The electronic device of any of claims 8-11, wherein, The electronic device further comprises a metal frame of the second device body and a floor of the second device body; the second conductor comprises the metal frame of the second device body and the floor of the second device body which enclose the first slot, the first slot is formed by hollowing out the floor of the second device body, the first slot is adjacent to the metal frame of the second device body, and the first gap is a gap formed on the metal frame of the second device body adjacent to the first slot and forming a first side of the first slot; on the metal frame, the first gap is formed on one side of the second feeding point, and the other side of the second feeding point is not provided with a gap.

13. An electronic device, comprising: Comprise: a first device body, a second device body and a hinge, the first device body and the second device body are connected through the hinge; The electronic device can be folded at the hinge; The electronic device further comprises a first antenna arranged on the first device body and a second antenna arranged on the second device body, wherein The first antenna comprises a strip-shaped first conductor, a first feeding point arranged on the first conductor and a grounding branch, the first conductor is open at both ends, the grounding branch connects the first conductor and the ground at the middle position of the first conductor, the distance from the first feeding point to the connection point of the first conductor and the grounding branch is greater than zero and less than 1 / 8 of the working wavelength of the first antenna, or the distance from the first feeding point to one open end of the first conductor is greater than or equal to zero and less than 1 / 8 of the working wavelength of the first antenna; The second antenna comprises a second conductor with a first slot, both ends of the first slot are closed and grounded, a second feeding point is arranged on the first side of the first slot, and the distance from the second feeding point to the middle position of the first side of the first slot is greater than or equal to zero and less than 1 / 16 of the working wavelength of the second antenna, wherein the first conductor and the second conductor at least partially overlap when the electronic device is in the folded state.

14. An electronic device, comprising: Comprise: a first device body, a second device body and a hinge, the first device body and the second device body are connected through the hinge; The electronic device can be folded at the hinge; The electronic device further comprises a first antenna arranged on the first device body and a second antenna arranged on the second device body, wherein The first antenna comprises a first conductor with a first slot, two ends of the first slot are closed and grounded, a first side of the first slot is provided with a first feeding point, a distance from the first feeding point to a middle position of the first side of the first slot is greater than or equal to zero and less than 1 / 16 of a working wavelength of the first antenna; The second antenna is an inverted F antenna, comprising a strip-shaped second conductor, a second feeding point and a grounding branch provided on the second conductor, one end of the second conductor is open, the other end of the second conductor is grounded through the grounding branch, a distance from the second feeding point to a connecting point of the second conductor and the grounding branch is greater than zero and less than 1 / 8 of a working wavelength of the second antenna, or a distance from the second feeding point to one open end of the second conductor is greater than or equal to zero and less than 1 / 8 of the working wavelength of the second antenna, wherein the first conductor and the second conductor at least partially overlap when the electronic device is in a folded state.

15. The electronic device of claim 13 or 14, wherein, The working frequency bands of the first antenna and the second antenna include the same frequency band.

16. The electronic device of any of claims 13-15, wherein, The first conductor and the second conductor at least partially overlap when the electronic device is in a folded state includes that projections of the first conductor and the second conductor on a plane where the first device body is located or on a plane where the second device body is located partially overlap or completely overlap.

17. The electronic device of any of claims 13-16, wherein, The electronic device further comprises a frame of the first device body and a floor of the first device body; the first conductor is a strip-shaped conductor provided on the frame of the first device body, the first conductor and the floor of the first device body are separated by a second slot and connected by the grounding branch, the second slot is formed by hollowing out the floor of the first device body, and the second slot is adjacent to the first conductor.

18. The antenna device of claim 17, wherein, The grounding branch is a strip-shaped floor part of the first conductor formed by hollowing out the floor of the first device body, or the grounding branch is a metal spring provided on the floor of the first device body and connected to the first conductor, or the grounding branch is a conductive branch of the first conductor extending out of the floor.

19. The electronic device of any of claims 13-17, wherein, The electronic device further comprises a metal frame of the second device body and a floor of the second device body; the second conductor comprises the metal frame of the second device body and the floor of the second device body which enclose to form the first slot, the first slot is formed by hollowing out the floor of the second device body, and the first slot is adjacent to the metal frame of the second device body; the metal frame of the second device body adjacent to the first slot does not have a gap formed on a first side of the first slot.

20. An electronic device, comprising: Comprise: A first device body, a second device body and a hinge, the first device body and the second device body are connected through the hinge; The electronic device can be folded at the hinge; The electronic device further comprises a first antenna provided on the first device body and a second antenna provided on the second device body, wherein The first antenna comprises a first conductor with a first slot, two ends of the first slot are closed and grounded, a first side of the first slot is provided with a first slit, a distance from the first slit to a middle position of the first side is less than 1 / 16 of a working wavelength of the first antenna, the first side of the first slot is provided with a first feeding point, a distance from the first feeding point to the first slit is greater than zero and less than 1 / 8 of the working wavelength of the first antenna; The second antenna comprises a second conductor with a second slot, two ends of the second slot are closed and grounded, a second side of the second slot is provided with a second feeding point, a distance from the second feeding point to a middle position of the second side of the second slot is greater than or equal to zero and less than 1 / 16 of a working wavelength of the second antenna, wherein the first conductor and the second conductor at least partially overlap when the electronic device is in the folded state.

21. The electronic device of claim 20, wherein, The working frequency bands of the first antenna and the second antenna comprise the same frequency band.

22. The electronic device of claim 20 or 21, wherein, The first conductor and the second conductor at least partially overlap when the electronic device is in the folded state comprises that projections of the first conductor and the second conductor on a plane where the first device body is located or on a plane where the second device body is located partially or completely overlap.

23. The electronic device of any of claims 20-22, wherein, The electronic device further comprises a metal frame of the first device body and a floor of the first device body, the first conductor comprises the metal frame of the first device body and the floor of the first device body which enclose the first slot, the first slot is formed by hollowing out the floor of the first device body, the first slot is adjacent to the metal frame of the first device body, and the metal frame of the first device body adjacent to the first slot and forming a first side edge of the first slot is not provided with a slit.

24. The electronic device of any of claims 20-23, wherein, The electronic device further comprises a metal frame of the second device body and a floor of the second device body, the second conductor comprises the metal frame of the second device body and the floor of the second device body which enclose the second slot, the second slot is formed by hollowing out the floor of the second device body, the second slot is adjacent to the metal frame of the second device body, the first slit is a slit provided on the metal frame of the second device body on a first side of the second slot, and the first slit is provided on one side of the second feeding point on the metal frame, and the other side of the second feeding point is not provided with a slit.

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