Electronic devices

Abstract

The embodiment of the present application discloses an electronic device, including a first part and a second part. The first part and the second part can be folded relative to each other to a closed state, and can also be unfolded relative to each other to an open state; when the first part and the second part are in a closed state, the frame of the first part and the frame of the second part partially overlap or completely overlap. The first part includes a first feeding antenna, a first feeding circuit and a first grounding circuit, the first feeding circuit is connected to the first feeding antenna, and is used to feed the first feeding antenna, and the first grounding circuit is connected to the first feeding antenna, and is used to ground the first feeding antenna. The second part includes a first parasitic antenna, and when the first part and the second part are in a closed state, the first parasitic antenna is not grounded and can be coupled with the first feeding antenna to generate a first excitation resonance signal. The above electronic device has better antenna performance when it is in a closed state.

Description

[0001] This application claims the priority of the Chinese patent application with application number 201910393785.6 filed with the State Intellectual Property Office of China on May 13, 2019, and the priority of the Chinese patent application with invention name “Electronic device”, and the priority of the Chinese patent application with application number 201910435969.4 filed with the State Intellectual Property Office of China on May 23, 2019, and the priority of the Chinese patent application with invention name “Electronic device”, all of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of wireless communication technology, and in particular, to an electronic device. Background Art

[0003] With the development of flexible display technology, the appearance (ID) of electronic devices (such as mobile phones) tends to develop from candy-bar phones to foldable phones. Foldable phones have a large screen when open, which fully satisfies consumers' visual experience. When closed, they are small and easy to carry. However, when the foldable phone is in the closed state, the antenna performance of the low-frequency band antenna in the traditional antenna architecture is significantly reduced compared to the open state, and the antenna performance is poor. Summary of the invention

[0004] An embodiment of the present application provides an electronic device having better antenna performance when the electronic device is in a closed state.

[0005] An embodiment of the present application provides an electronic device, including a first part and a second part. The first part and the second part can be folded relative to each other to a closed state, and can also be unfolded relative to each other to an open state. When the first part and the second part are in the closed state, the frame of the first part and the frame of the second part partially overlap or completely overlap.

[0006] The first part includes a first feeding antenna, a first feeding circuit and a first grounding circuit. The first feeding circuit is connected to the first feeding antenna and is used to feed the first feeding antenna. The first grounding circuit is connected to the first feeding antenna and is used to ground the first feeding antenna.

[0007] The second part includes a first parasitic antenna. When the first part and the second part are in a closed state, the first parasitic antenna is not grounded and can be coupled with the first feeding antenna to generate a first excitation resonance signal.

[0008] In this embodiment, when the first part and the second part are in a closed state, the first parasitic antenna and the first feeding antenna are at least partially arranged relative to each other to form a coupling capacitor between the two, so that a first excitation resonance signal can be coupled. When the first feeding antenna is working, the radio frequency energy of the first feeding antenna is transmitted to the first parasitic antenna by coupling, thereby exciting an additional resonant mode on the first parasitic antenna, thereby expanding the radiation bandwidth of the antenna, reducing the adverse effects of the shortened length of the ground plate and the overlapping of the frame on the antenna performance in the closed state, and improving the antenna performance of the electronic device, that is, the electronic device has better antenna performance in the closed state. When the first parasitic antenna is not grounded, the electrical length is 1 / 2 wavelength, that is, the first parasitic antenna is a 1 / 2 wavelength antenna. At this time, the shortened length of the ground plate when folded has a weak effect on the performance of the first parasitic antenna, so that the first parasitic antenna can maintain good radiation performance when the first part and the second part are in a closed state, thereby effectively expanding the radiation bandwidth of the first feeding antenna.

[0009] Optionally, a matching circuit may be provided between the first feeding circuit and the first feeding antenna, and the matching circuit is used to match the characteristic impedance. The matching circuit may include at least one circuit component. For example, the matching circuit may include at least one of a resistor, an inductor, and a capacitor as a lumped element. For example, the matching circuit may include at least one of a microstrip line and a strip line as a distributed element.

[0010] In an optional embodiment, the second part further includes a second feeding antenna. The second feeding antenna is electrically isolated from the first parasitic antenna. When the first part and the second part are in an open state, the first parasitic antenna can couple with the second feeding antenna to generate a second excitation resonance signal.

[0011] In this embodiment, the first parasitic antenna can be coupled with the second feeding antenna when the first part and the second part are in an open state, and a coupling capacitance is generated between the first parasitic antenna and the second feeding antenna, so that coupling excitation can generate a second excitation resonance signal. When the second feeding antenna is working, the radio frequency energy of the second feeding antenna is transmitted to the first parasitic antenna by coupling, thereby exciting an additional resonant mode on the first parasitic antenna, thereby expanding the radiation bandwidth of the antenna and improving the antenna performance of the electronic device. Since the first parasitic antenna can be coupled with the first feeding antenna when the first part and the second part are in a closed state, and coupled with the second feeding antenna when the first part and the second part are in an open state, the electronic device can reuse the first parasitic antenna, thereby improving the utilization rate of the antenna.

[0012] Optionally, when the first part and the second part are in the open state, the first feed antenna, the second feed antenna and the first parasitic antenna are respectively located at different vertex areas of the electronic device. At this time, the first feed antenna and the second feed antenna can operate in similar frequency bands, and both have a large space, and the degree of mutual interference is small. The first parasitic antenna can also be better coupled with the first feed antenna and the second feed antenna in the two states.

[0013] In an optional embodiment, the second part also includes a second feeding circuit and a second grounding circuit. The second grounding circuit is connected to one end of the second feeding antenna for grounding the second feeding antenna. The other end of the second feeding antenna is an open end that is not grounded. The second feeding circuit is connected to the second feeding antenna, and the access position of the second feeding circuit on the second feeding antenna is located between the access position of the second grounding circuit on the second feeding antenna and the open end. At this time, the second feeding antenna is a 1 / 4 wavelength antenna. When the first part and the second part are in an open state, the first parasitic antenna is grounded. At this time, the electrical length of the first parasitic antenna is 1 / 4 wavelength, that is, the first parasitic antenna is a 1 / 4 wavelength antenna. The electrical length of the first parasitic antenna is adjustable so that it can have different electrical lengths in different usage environments.

[0014] In this embodiment, the coupling effect between the first parasitic antenna and the second feeding antenna is very good, and the bandwidth of the second feeding antenna can be greatly expanded. To improve the coupling effect, in one example, the end of the second feeding antenna away from the first parasitic antenna is a grounded end, and the end of the second feeding antenna close to the first parasitic antenna is an open end.

[0015] Optionally, a matching circuit may be provided between the second feeding circuit and the second feeding antenna, and the matching circuit is used to match the characteristic impedance. The matching circuit may include at least one circuit component. For example, the matching circuit may include at least one of a resistor, an inductor, and a capacitor as a lumped element. For example, the matching circuit may include at least one of a microstrip line and a strip line as a distributed element.

[0016] In an optional embodiment, the second part further includes a switching circuit. One end of the switching circuit is connected to the first parasitic antenna and the other end is grounded. The switching circuit is used to disconnect the first parasitic antenna from the ground when the first part and the second part are in a closed state. At this time, the electrical length of the first parasitic antenna is 1 / 2 wavelength. The switching circuit is also used to connect the first parasitic antenna to the ground when the first part and the second part are in an open state. At this time, the electrical length of the first parasitic antenna is 1 / 4 wavelength.

[0017] In this embodiment, the switching circuit is configured to make the electrical length of the first parasitic antenna adjustable, and the first parasitic antenna can achieve different coupling effects when the electronic device is in different use states, thereby achieving the effect of multiplexing the antenna.

[0018] In one example, the switching circuit may include a tuning switch. The switching circuit switches the connection relationship between the first parasitic antenna and the ground by switching the connection and disconnection states of the tuning switch, so that the electrical length of the first parasitic antenna is adjustable. For example, the tuning switch can be connected roughly to the middle of the first parasitic antenna. In the present application, the middle of the antenna includes the middle position and other positions slightly deviated from the middle position, and the middle of the antenna is located between the two ends of the antenna. The middle of the first parasitic antenna is located between the two ends of the first parasitic antenna.

[0019] In another example, the switching circuit may include a tuning switch and a first matching branch and a second matching branch. The first matching branch is different from the second matching branch. The control end of the tuning switch is connected to the first parasitic antenna, and the two selection ends of the tuning switch are connected to the first matching branch and the second matching branch. The switching circuit switches the connection between the first matching branch and the second matching branch through the control end of the tuning switch, switches the connection relationship between the first parasitic antenna and the ground, and makes the electrical length of the first parasitic antenna adjustable.

[0020] Optionally, the first part also includes a second parasitic antenna. When the first part and the second part are in a closed state, the second parasitic antenna is not grounded and can be coupled with the second feeding antenna to generate a third excitation resonance signal. At this time, the second parasitic antenna is a 1 / 2 wavelength antenna. Wherein, the second parasitic antenna can be located in the upper left corner of the electronic device when the first part and the second part are in an open state. The second parasitic antenna and the first feeding antenna, the second feeding antenna and the first parasitic antenna are respectively located in different vertex angle areas of the electronic device. Wherein, when the first part and the second part are in an open state, the second parasitic antenna can be coupled with the first feeding antenna to generate a fourth excitation resonance signal. At this time, the second parasitic antenna can be grounded.

[0021] Optionally, the physical length of the metal segment where the first parasitic antenna is located and the switching circuit can be designed so that the first parasitic antenna can be switched between a grounded state and an ungrounded state, that is, the electrical length of the first parasitic antenna can be switched between 1 / 2 wavelength and 1 / 4 wavelength.

[0022] In an optional embodiment, the second part also includes one or more first tuning circuits. The one or more first tuning circuits are connected to the first parasitic antenna. The first tuning circuit is used to adjust the electrical length of the first parasitic antenna. In this embodiment, by connecting one or more tuning circuits to the first parasitic antenna, the electrical length of the first parasitic antenna meets the adjustment requirements through the cooperation of the one or more tuning circuits.

[0023] One or more first tuning circuits may be connected to the ends of the first parasitic antenna to better tune the antenna. For example, the second part includes two first tuning circuits, and the two first tuning circuits are respectively connected to the two ends of the first parasitic antenna. The first tuning circuit may include one or more of a switch, a capacitor, an inductor, or a low-pass high-impedance filter.

[0024] In an optional embodiment, the second part also includes a second feeding antenna, a second feeding circuit and a second grounding circuit. The second feeding antenna is electrically isolated from the first parasitic antenna. The second grounding circuit is connected to the middle of the second feeding antenna. Both ends of the second feeding antenna are open ends that are not grounded. The second feeding circuit is connected to the second feeding antenna, and the access position of the second feeding circuit on the second feeding antenna is located between the access position of the second grounding circuit on the second feeding antenna and one end of the second feeding antenna. At this time, the second feeding antenna is a 1 / 2 wavelength antenna. The first parasitic antenna is a suspended antenna. That is, the first parasitic antenna is not grounded.

[0025] In this embodiment, when the first part and the second part are in an open state, the second feed antenna has two antenna mode coverages, has a larger bandwidth, and has better antenna performance, so the second feed antenna can be uncoupled from the first parasitic antenna. When the first part and the second part are in a closed state, the first feed antenna is coupled with the 1 / 2 wavelength first parasitic antenna to improve the antenna performance of the first feed antenna and reduce the adverse effects of the external environment. At this time, the antenna architecture does not need to switch different coupling antenna forms when the first part and the second part are in different states, that is, the first parasitic antenna can be a single 1 / 2 wavelength antenna, and there is no need to set a switching circuit, making the structure of the antenna architecture simpler.

[0026] Optionally, the electronic device also includes a fifth feeding antenna, a fifth feeding circuit, a fifth grounding circuit and a third parasitic antenna. The fifth feeding antenna is located in the second part and the third parasitic antenna is located in the first part (in other embodiments, the fifth feeding antenna may be located in the first part and the third parasitic antenna may be located in the second part). The fifth feeding antenna is electrically isolated from the first parasitic antenna and the second feeding antenna. The fifth feeding circuit is connected to the fifth feeding antenna for feeding the fifth feeding antenna. The fifth grounding circuit is connected to the fifth feeding antenna for grounding the fifth feeding antenna. When the first part and the second part are in a closed state, the third parasitic antenna is not grounded and can be coupled with the fifth feeding antenna to generate a fifth excitation resonance signal. At this time, the electrical length of the third parasitic antenna is 1 / 2 wavelength, that is, the third parasitic antenna is a 1 / 2 wavelength antenna. In this embodiment, the fifth feeding antenna can be used to radiate medium and high frequency signals.

[0027] In an optional embodiment, the electronic device further includes a rotating portion. The rotating portion connects the first portion and the second portion. The rotating portion can be deformed so that the first portion and the second portion are relatively rotated to be folded or unfolded. The rotating portion is located in a central area of ​​the electronic device. The rotating portion being located in the central area of ​​the electronic device means that the center line of the rotating portion substantially coincides with the center line of the electronic device (slight deviation is allowed). When the first portion and the second portion are in a closed state, the first portion overlaps with the second portion, and the frame of the first portion completely overlaps with the frame of the second portion. At this time, the frame of the first portion and the frame of the second portion are completely arranged relative to each other.

[0028] When the first part and the second part are in the open state, the first feed antenna, the second feed antenna and the first parasitic antenna are respectively located at different vertex areas of the electronic device. At this time, the first feed antenna and the second feed antenna can operate in similar frequency bands, and both have a large space, and the degree of mutual interference is small. The first parasitic antenna can also be better coupled with the first feed antenna and the second feed antenna in the two states.

[0029] In an optional embodiment, the electronic device further comprises a rotating portion. The rotating portion connects the first portion and the second portion. The rotating portion can be deformed so that the first portion and the second portion are relatively rotated to be folded or unfolded, and the rotating portion deviates from the central area of ​​the electronic device. At this time, the deviation between the center line of the rotating portion and the center line of the electronic device is large. When the first portion and the second portion are in a closed state, an end of one of the first portion or the second portion protrudes relatively.

[0030] When the first part and the second part are in an open state, the electronic device includes two sides across the rotating part, the first feeding antenna and the first parasitic antenna are located on the same side, and the second feeding antenna and the first feeding antenna are located on different sides. At this time, when the first part and the second part are in a closed state, the first feeding antenna and the first parasitic antenna can be coupled to each other. The second feeding antenna and the first feeding antenna are located on different sides. At this time, the first feeding antenna and the second feeding antenna both have a large radiation space.

[0031] The first parasitic antenna may extend from the edge of the side edge of the electronic device along the vertex area to another edge of the electronic device. The second parasitic antenna may extend from the other side edge of the electronic device along another vertex area to another edge of the electronic device.

[0032] In an optional embodiment, the first part is slidably connected to the second part. When the first part and the second part slide relative to each other, they can be relatively folded to a closed state, and can also be relatively unfolded to an open state. When the first part and the second part are in a closed state, the first part and the second part are in an up-and-down stacking manner. When the first part and the second part are in an open state, a small part of the first part 10 and the second part remain in a stacked state, and most of the areas are in a staggered state, that is, an unfolded state. In one embodiment, when the first part and the second part are in an open state, the first part and the second part can also be arranged completely staggered.

[0033] When the first part and the second part are in a closed state, the first feeding antenna and the second feeding antenna are respectively located at two diagonally arranged vertex areas of the electronic device. At this time, the first feeding antenna and the second feeding antenna both have sufficient radiation space.

[0034] In an optional embodiment, the first feed antenna and the first parasitic antenna are part of a frame of the electronic device. The frame of the electronic device includes a frame of a first part and a frame of a second part. For example, the frame of the first part includes at least two metal segments and at least one insulating segment for electrically isolating the at least two metal segments. The first feed antenna can be formed on one of the metal segments. The frame of the second part includes at least two metal segments and at least one insulating segment for electrically isolating the at least two metal segments. The first parasitic antenna can be formed on one of the metal segments.

[0035] Alternatively, the first feed antenna and the first parasitic antenna are fixed to the inner side of the frame of the electronic device. For example, the first feed antenna is fixed to the inner side of the frame of the first part. The first parasitic antenna is fixed to the inner side of the frame of the second part. In this case, the structure of the first feed antenna can be a flexible circuit board, laser direct structuring (LDS) metal, in-mold injection metal or printed circuit board traces.

[0036] Optionally, the first part also includes a second parasitic antenna. When the first part and the second part are in a closed state, the second parasitic antenna is not grounded and can be coupled with the second feeding antenna to generate a third excitation resonance signal. At this time, the second parasitic antenna is a 1 / 2 wavelength antenna. Wherein, the second parasitic antenna can be located in the upper left corner of the electronic device when the first part and the second part are in an open state. The second parasitic antenna and the first feeding antenna, the second feeding antenna and the first parasitic antenna are respectively located in different vertex angle areas of the electronic device. Wherein, when the first part and the second part are in an open state, the second parasitic antenna can be coupled with the first feeding antenna to generate a fourth excitation resonance signal. At this time, the second parasitic antenna can be grounded.

[0037] In an optional embodiment, the second part also includes a third feeding circuit and a first filtering circuit. The third feeding circuit and the first filtering circuit are connected at different positions of the first parasitic antenna to form a third feeding antenna on the first parasitic antenna. The radiation frequency band of the third feeding antenna is different from the radiation frequency band of the first feeding antenna. For example, the first feeding antenna is a low-frequency band antenna. The radiation frequency band of the third feeding antenna is a wireless LAN antenna, a short-range wireless communication antenna, a medium-high frequency band antenna, a Sub 6G antenna (frequency lower than 6GHz) or a wireless charging antenna, etc. At this time, the first filtering circuit has a low-resistance high-pass characteristic. For example, the first filtering circuit includes a high-pass low-resistance filter.

[0038] At this time, the third feeding antenna and the first parasitic antenna share the same radiator, which can improve antenna utilization. In addition, since the radiation frequency band of the third feeding antenna is different from that of the first feeding antenna, the third feeding antenna and the first feeding antenna will not interfere with each other and have good isolation.

[0039] In an optional embodiment, the electronic device further includes a fourth feed antenna, a fourth feed circuit, and a second filter circuit. The fourth feed antenna is adjacent to the first parasitic antenna and is electrically isolated from each other. The fourth feed circuit is connected to the fourth feed antenna. The filter circuit is connected to the first parasitic antenna. The radiation frequency band of the fourth feed antenna is different from the radiation frequency band of the first feed antenna. For example, the first feed antenna is a low-frequency band antenna. The radiation frequency band of the fourth feed antenna is a wireless LAN antenna, a short-range wireless communication antenna, a medium-high frequency band antenna, or a wireless charging antenna. At this time, the second filter circuit has a low-impedance high-pass characteristic. For example, the second filter circuit includes a high-pass low-impedance filter.

[0040] At this time, the radiator part where the first parasitic antenna is located is reused as a parasitic branch of the fourth feeding antenna, which can improve the antenna utilization rate. In addition, since the radiation frequency band of the fourth feeding antenna is different from the radiation frequency band of the first feeding antenna, the fourth feeding antenna and the first feeding antenna will not interfere with each other and have good isolation.

[0041] The fourth feeding antenna may be located in the first part or the second part. The access position of the fourth feeding antenna on the first parasitic antenna is located between the access position of the switching circuit on the first parasitic antenna and the fourth feeding antenna.

[0042] In an optional embodiment, the electronic device further includes a sensing device. The sensing device is located in the first part and / or the second part. The sensing device is used to sense that the first part and the second part are in a closed state or an open state. The sensing device is electrically connected to a processor of the electronic device. The processor is located in the first part and / or the second part. The processor of the electronic device receives a detection signal from the sensing device, and sends a corresponding control signal to other components of the electronic device based on the signal, so that the other components of the electronic device can be adjusted to the corresponding working mode in time according to whether the first part and the second part are in a closed state or an open state, so that the reliability of the electronic device is higher and the user experience is better. The sensing device may include one or more of a gyroscope sensor, a Hall sensor, or a proximity light sensor.

[0043] Optionally, the electronic device further includes a display screen. The display screen is used to display images, videos, etc. In this embodiment, the display screen adopts a flexible display screen. The display screen can be continuously located on the same side of the first part, the rotating part, and the second part, so that when the first part and the second part of the electronic device are in an open state, the electronic device has a continuous large-area display screen, thereby realizing a large-screen display, and when the first part and the second part of the electronic device are in a closed state, the front, back, and side of the electronic device can all realize display.

[0044] Optionally, the electronic device further includes a ground plane. The ground plane is grounded and extends from the first portion to the second portion. In one embodiment, the ground plane is a circuit board of the electronic device. For example, the ground plane can be a flexible circuit board. Alternatively, the ground plane is a combination of a soft and a hard circuit board. In another embodiment, the ground plane can be integrated into other components of the electronic device, such as a display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application in a first embodiment;

[0046] Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic device shown in another use state;

[0047] Figure 3 yes Figure 2 A schematic diagram of the structure of the electronic device shown at another angle;

[0048] Figure 4 yes Figure 1 A graph of reflection coefficient of an exemplary structure of the electronic device shown;

[0049] Figure 5 yes Figure 1 An efficiency graph of an example configuration of the electronic device shown;

[0050] Figure 6yes Figure 1 A schematic diagram of an antenna structure of the electronic device in one embodiment;

[0051] Figure 7 yes Figure 6 A schematic diagram of the antenna structure when the electronic device is in another use state;

[0052] Figure 8 yes Figure 6 A reflection coefficient graph of an exemplary structure of the antenna architecture shown;

[0053] Fig. 9 yes Figure 6 An efficiency graph of an example structure of the antenna architecture shown;

[0054] Fig.10 yes Figure 6 A simulation diagram of the current and electric field of an example structure of the antenna architecture shown;

[0055] Fig.11 yes Figure 6 A reflection coefficient graph of another exemplary structure of the antenna architecture shown;

[0056] Fig.12 yes Figure 6 An efficiency curve diagram of another exemplary structure of the antenna architecture shown;

[0057] Fig.13 yes Figure 1 A schematic diagram of an antenna structure of the electronic device in another embodiment;

[0058] Fig.14 yes Figure 1 A schematic diagram of an antenna structure of the electronic device in another embodiment;

[0059] Fig.15 yes Figure 1 A schematic diagram of an antenna structure of the electronic device in another embodiment;

[0060] Fig.16 yes Figure 1 A schematic diagram of an antenna structure of the electronic device in another embodiment;

[0061] Fig.17 yes Figure 1 A schematic diagram of an antenna structure of the electronic device in another embodiment;

[0062] Fig.18 yes Fig.17 A schematic diagram of the antenna structure shown in another usage state;

[0063] Fig.19 yes Fig.17 A reflection coefficient curve diagram of a second feed antenna of an exemplary structure of the antenna architecture shown;

[0064] Fig. 20 yes Fig.17 An efficiency curve diagram of a second feed antenna of an exemplary structure of the antenna architecture shown;

[0065] Fig.21 yes Fig.17 Simulation of the current, electric field and radiation direction of the second feeding antenna of an exemplary structure of the antenna architecture shown;

[0066] Fig. 22 yes Fig.17 A reflection coefficient graph of an exemplary structure of the antenna architecture shown;

[0067] Fig.23 yes Fig.17 An efficiency graph of an example structure of the antenna architecture shown;

[0068] Fig.24 yes Figure 1 A schematic diagram of an antenna structure of the electronic device in another embodiment;

[0069] Fig.25 is a schematic diagram of the structure of the electronic device of the embodiment of the present application in the second embodiment;

[0070] Fig.26 yes Fig.25 A schematic diagram of the antenna architecture of the electronic device shown;

[0071] Fig. 27 is a schematic structural diagram of the electronic device of the embodiment of the present application in the third embodiment;

[0072] Fig.28 yes Fig. 27 A schematic diagram of an antenna structure of the electronic device in one embodiment;

[0073] Fig.29 yes Fig. 27 A schematic diagram of an antenna structure of the electronic device in one embodiment;

[0074] Fig.30 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application;

[0075] Fig.31 yes Fig.30 A schematic diagram of the antenna architecture of the electronic device shown;

[0076] Fig.32 yes Fig.31 A schematic diagram of the antenna structure shown in another usage state. DETAILED DESCRIPTION

[0077] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0078] An embodiment of the present application provides an electronic device, which may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), or a wearable device.

[0079] Among them, the electronic device includes multiple antennas. In this application, "multiple" means at least two. The antenna is used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antenna. The antenna can be in the form of a dipole antenna, a monopole antenna, an inverted F-shaped antenna (IFA), a patch antenna, etc.

[0080] Electronic devices can use multiple antennas to communicate with a network or other devices through wireless communication technologies. Among them, wireless communication technologies include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division code division multiple access (TD-SCDMA), long term evolution (LTE), Bluetooth (BT), global navigation satellite system (GNSS), wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), near field communication technology (NFC), frequency modulation (FM), and / or infrared technology (IR). In this application, "A and / or B" includes "A", "B" and "A and B".

[0081] Please also read Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of the electronic device of the embodiment of the present application in the first embodiment, Figure 2 yes Figure 1 The schematic diagram of the structure of the electronic device shown in FIG. 1 is another use state. Figure 3 yes Figure 2 The structure diagram of the electronic device shown is from another angle. Figure 1 The electronic device shown is described by taking a mobile phone as an example.

[0082] The electronic device 100 includes a first part 10 and a second part 20. A plurality of antennas may be distributed in the first part 10 and the second part 20. The first part 10 and the second part 20 can be relatively folded to a closed state, and can also be relatively unfolded to an open state. That is, the first part 10 and the second part 20 can switch between a closed state and an open state. Figure 1 Corresponding to the open state of the electronic device 100. Figure 2 and Figure 3Corresponding to the closed state of the electronic device 100.

[0083] Optionally, the electronic device 100 further includes a sensing device 30. The sensing device 30 is located in the first part 10 and / or the second part 20. The sensing device 30 is used to sense that the first part 10 and the second part 20 are in a closed state or an open state. The sensing device 30 is electrically connected to a processor 40 of the electronic device 100. The processor 40 is located in the first part 10 and / or the second part 20. The processor 40 of the electronic device 100 receives the detection signal of the sensing device 30, and sends a corresponding control signal to other components of the electronic device 100 according to the signal, so that other components of the electronic device 100 can be timely adjusted to a corresponding working mode according to whether the first part 10 and the second part 20 are in a closed state or an open state, so that the reliability of the electronic device 100 is higher and the user experience is better. The sensing device 30 may include one or more of a gyroscope sensor, a Hall sensor, or a proximity light sensor.

[0084] Optionally, the first part 10 and the second part 20 have a variety of connection relationships, such as a rotational connection, a sliding connection, a detachable snap-fit ​​connection, etc. In this embodiment, the first part 10 is rotatably connected to the second part 20 as an example for description. For example, the electronic device 100 also includes a rotating part 50. The rotating part 50 connects the first part 10 and the second part 20. The rotating part 50 can be deformed so that the first part 10 and the second part 20 are relatively rotated to be folded or unfolded. Figure 1 As shown, when the first part 10 and the second part 20 rotate relative to each other to unfold to the open state, the rotating part 50 is located between the first part 10 and the second part 20, and the rotating part 50 is located in the central area of ​​the electronic device 100. The rotating part 50 is located in the central area of ​​the electronic device 100 means that the center line of the rotating part 50 and the center line of the electronic device 100 substantially coincide (a slight deviation is allowed). The rotating part 50 extends along the first direction X, and the first part 10 and the second part 20 rotate relative to each other around the first direction X. At this time, as shown in FIG. Figure 2 and Figure 3 As shown, when the first part 10 and the second part 20 are in a closed state, the first part 10 overlaps with the second part 20, and the frame 101 of the first part 10 and the frame 201 of the second part 20 completely overlap. At this time, the frame 101 of the first part 10 and the frame 201 of the second part 20 are completely arranged opposite to each other. Among them, the frame of the electronic device 100 includes the frame 101 of the first part 10 and the frame 201 of the second part 20. Most of the components of the electronic device 100 are located inside its frame. In other embodiments, the rotating part 50 can also be offset from the central area of ​​the electronic device 100, which embodiment will be described later.

[0085] Optionally, the electronic device 100 further includes a display screen 60. The display screen 60 is used to display images, videos, etc. In this embodiment, the display screen 60 adopts a flexible display screen, such as an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MIL-E) display screen, a micro organic light-emitting diode (MIL-E) display screen, a micro organic light-emitting diode (MIL-E) display screen, and a quantum dot light-emitting diode (QLED) display screen. At this time, the display screen 60 can be continuously located on the same side of the first part 10, the rotating part 50 and the second part 20, so that the electronic device 100 has a continuous large-area display screen when the first part 10 and the second part 20 are in an open state, thereby realizing a large-screen display. When the electronic device 100 is in a closed state, the front, back and side of the electronic device 100 can all realize display.

[0086] In other embodiments, the display screen 60 may also be a rigid display screen, such as a liquid crystal display (LCD). In this case, the display screen 60 may include two display parts, which are located in the first part 10 and the second part 20 respectively.

[0087] Optionally, when the first part 10 and the second part 20 of the electronic device 100 rotate relative to each other, there may be multiple flipping modes. Figure 1 As shown by the solid arrow, in one flipping mode, when the first part 10 and the second part 20 are folded relative to each other, the portion of the display screen 60 located at the first part 10 and the portion located at the second part 20 face each other and are close to each other. When the first part 10 and the second part 20 are in a closed state, the display screen 60 is located inside the first part 10 and the second part 20. This flipping mode is also referred to as the display screen 60 folding inwards. In another flipping mode, as shown in FIG. Figure 1As shown by the dotted arrow, when the first part 10 and the second part 20 are relatively folded, the portion of the display screen 60 located at the first part 10 and the portion located at the second part 20 are back to back and away from each other, and when the first part 10 and the second part 20 are in a closed state, the display screen 60 is located outside the first part 10 and the second part 20. This flipping mode is also called folding the display screen 60 outward.

[0088] Optionally, the first part 10 includes a first feed antenna 11. The first feed antenna 11 can have a variety of structural forms. For example, the first feed antenna 11 is a part of the frame 101 of the first part 10 of the electronic device 100 or is fixed to the inner side of the frame 101 of the first part 10. In this embodiment, the first feed antenna 11 is taken as an example to be a part of the frame 101 of the first part 10. Among them, the frame 101 of the first part 10 includes at least two metal segments and at least one insulating segment for electrically isolating the at least two metal segments. The first feed antenna 11 can be formed on one of the metal segments. In other embodiments, the first feed antenna 11 is fixed to the inner side of the frame 101 of the first part 10. At this time, the structural form of the first feed antenna 11 can be a flexible circuit board, laser direct structuring (LDS) metal, in-mold injection metal or a trace of a printed circuit board.

[0089] See also Figure 1 , the electronic device 100 further includes a grounding plate 70. The grounding plate 70 is grounded and extends from the first portion 10 to the second portion 20. In one embodiment, the grounding plate 70 is a circuit board of the electronic device 100. For example, the grounding plate 70 may be a flexible circuit board. Alternatively, the grounding plate 70 is a rigid-flexible circuit board. In another embodiment, the grounding plate 70 may be integrated into other components of the electronic device 100, such as the display screen 60.

[0090] In this embodiment, the first feed antenna 11 is a grounded 1 / 4 wavelength antenna. The first feed antenna 11 may be a low frequency band antenna (600MHz to 960MHz), such as LTE B28 (703MHz to 803MHz), LTE B30 (791MHz to 862MHz), etc. When the first part 10 and the second part 20 are in an open state, the first feed antenna 11 may radiate through the longer ground plate 70, thereby achieving better performance.

[0091] Please also read Figures 1 to 3In this embodiment, after the first part 10 and the second part 20 are transformed from the open state to the folded state, the length of the ground plate 70 in the second direction (perpendicular to the first direction X) is shortened by about half, the frame 101 of the first part 10 and the frame 201 of the second part 20 overlap, the space of the first feeding antenna 11 is affected, and the low-frequency performance is greatly reduced compared with the open state.

[0092] For example, please refer to Figure 4 and Figure 5 , Figure 4 yes Figure 1 A reflection coefficient curve diagram of an exemplary structure of the electronic device shown, Figure 5 yes Figure 1 The efficiency curve diagram of an example structure of the electronic device shown in FIG. Figure 4 and Figure 5 The comparison results of the first feeding antenna 11 in two frequency bands, low-frequency LTE B20 (791 MHz to 862 MHz) and LTE B8 (880 MHz to 960 MHz), are given. Figure 4 and Figure 5 In FIG. 1 , the solid line represents the performance of the first feeding antenna 11 when the first part 10 and the second part 20 are in an open state, and the dotted line represents the performance of the first feeding antenna 11 when the first part 10 and the second part 20 are in a closed state. Figure 4 The horizontal axis represents the frequency (in GHz), and the vertical axis represents the reflection coefficient (in dB). Figure 5 The horizontal axis represents frequency (in GHz), and the vertical axis represents efficiency (in dB).

[0093] Figure 4 and Figure 5 In the corresponding example structure, the first feeding antenna 11 is a frame antenna in the form of an inverted F antenna. The first feeding antenna 11 is located at the upper right corner of the first part 10 away from the second part 20 (when the first part 10 and the second part 20 are in the open state, it is located at the upper right corner of the electronic device 100). The frame thickness of the electronic device 100 is about 4 mm and the width is about 3 mm. The width of the clearance area between the frame of the electronic device 100 and the ground plate 70 is about 1 mm. The partition width between two adjacent metal segments in the frame of the electronic device 100 is about 1.5 mm. The dielectric constant of the insulating material used in the insulating segment between the two adjacent metal segments and the insulating material filled in the clearance area between the frame of the electronic device 100 and the ground plate 70 is 3.0 and the loss angle is 0.01. The rotating part 50 of the first part 10 and the second part 20 is located in the central area of ​​the electronic device 100. When the first part 10 and the second part 20 are in the closed state, the spacing between the frame 101 of the first part 10 and the frame 201 of the second part 20 in the thickness direction of the electronic device 100 is about 1 mm.

[0094] Depend on Figure 4 and Figure 5 It can be seen that in the higher frequency band part of the low frequency band (near 900 MHz), the low frequency performance of the first feeding antenna 11 when the first part 10 and the second part 20 are in the closed state and the open state is close. However, in the lower frequency band part of the low frequency band (700 MHz to 800 MHz), the low frequency performance of the first feeding antenna 11 when the first part 10 and the second part 20 are in the closed state is significantly reduced compared to the low frequency performance when the first part 10 and the second part 20 are in the open state.

[0095] In addition, in addition to the low frequency band, when the first feeding antenna 11 is a medium-high frequency antenna (1700MHz to 2700MHz, such as GPS, Wifi, and LTE B3, B1, B7, etc.), when the first part 10 and the second part 20 are in a closed state, due to the change in the length of the ground plate 70 and the overlapping influence of the frame 101 of the first part 10 and the frame 201 of the second part 20, the performance of the first feeding antenna 11 is also reduced to varying degrees.

[0096] Please also read Figure 6 and Figure 7 , Figure 6 yes Figure 1 A schematic diagram of an antenna structure of an electronic device in one embodiment is shown, Figure 7 yes Figure 6 The antenna structure shown is a schematic diagram of the electronic device in another use state. Figure 6 Corresponding to the structure when the first part 10 and the second part 20 are in the open state, Figure 7 This corresponds to the structure when the first part 10 and the second part 20 are in a closed state. Figure 6 The antenna located above the dot-dash line is located in the first part 10 , and the antenna located below the dot-dash line is located in the second part 20 . Figure 7 In the figure, since the antennas located in the first part 10 and the second part 20 will overlap when in a closed state, the antenna of the first part 10 and the antenna of the second part 20 are staggered so that the antenna of the first part 10 is located outside the antenna of the second part 20.

[0097] The first part 10 includes a first feeding antenna 11, a first feeding circuit 12 and a first grounding circuit 13. The first feeding circuit 12 is connected to the first feeding antenna 11 and is used to feed the first feeding antenna 11. The first grounding circuit 13 is connected to the first feeding antenna 11 and is used to ground the first feeding antenna 11. Figure 6As shown, the first grounding circuit 13 is connected to one end of the first feeding antenna 11, and is used to ground the first feeding antenna 11. The end of the first feeding antenna 11 connected to the first grounding circuit 13 is the grounding end. The other end of the first feeding antenna 11 is an open end that is not grounded. The access position of the first feeding circuit 12 on the first feeding antenna 11 is located between the access position of the first grounding circuit 13 on the first feeding antenna 11 and the open end of the first feeding antenna 11. At this time, the electrical length of the first feeding antenna 11 is 1 / 4 wavelength, that is, the first feeding antenna 11 is a 1 / 4 wavelength antenna.

[0098] The second part 20 includes a first parasitic antenna 21. When the first part 10 and the second part 20 are in a closed state, the first parasitic antenna 21 is not grounded and can be coupled with the first feeding antenna 11 to generate a first excitation resonance signal. At this time, the electrical length of the first parasitic antenna 21 is 1 / 2 wavelength, that is, the first parasitic antenna 21 is a 1 / 2 wavelength antenna. The number of the first excitation resonance signal can be one or more.

[0099] In this embodiment, when the first part 10 and the second part 20 are in a closed state, the first parasitic antenna 21 and the first feeding antenna 11 are at least partially arranged opposite to each other, and a coupling capacitor is formed between the two, so that coupling excitation can generate a first excitation resonance signal. When the first feeding antenna 11 is working, the radio frequency energy of the first feeding antenna 11 is transmitted to the first parasitic antenna 21 by coupling, thereby exciting an additional resonance mode on the first parasitic antenna 21, thereby expanding the radiation bandwidth of the antenna, reducing the adverse effects of the shortened length of the ground plate 70 and the overlapping of the frame on the antenna performance in the closed state, and improving the antenna performance of the electronic device 100, that is, the electronic device 100 has better antenna performance in the closed state.

[0100] Among them, when the first parasitic antenna 21 is not grounded, its electrical length is 1 / 2 wavelength, and the shortened length of the ground plate 70 when folded has a weak effect on the performance of the first parasitic antenna 21, so that the first parasitic antenna 21 can maintain good radiation performance when the first part 10 and the second part 20 are in a closed state, thereby effectively expanding the radiation bandwidth of the first feeding antenna 11.

[0101] For example, please refer to Figures 8 to 10 , Figure 8 yes Figure 6 A reflection coefficient curve diagram of an exemplary structure of the antenna architecture shown, Fig. 9 yes Figure 6 An efficiency curve diagram of an example structure of the antenna architecture shown, Fig.10 yes Figure 6 The simulation diagram of the current and electric field of an example structure of the antenna architecture shown. Figure 8 and Fig. 9The diagram shows the comparison results of the first feeding antenna 11 (1 / 4 wavelength antenna) in two frequency bands: low-frequency LTE B20 (791 MHz to 862 MHz) and LTE B8 (880 MHz to 960 MHz). Figure 8 and Fig. 9 , the solid line represents the performance of the first feeding antenna 11 (1 / 4 wavelength antenna) not coupled to the first parasitic antenna 21 when the first part 10 and the second part 20 are in a closed state, and the dotted line represents the performance of the first feeding antenna 11 (1 / 4 wavelength antenna) coupled to the first parasitic antenna 21 (1 / 2 wavelength antenna) when the first part 10 and the second part 20 are in a closed state. Figure 8 The horizontal axis represents the frequency (in GHz), and the vertical axis represents the reflection coefficient (in dB). Fig. 9 The horizontal axis represents frequency (in GHz), and the vertical axis represents efficiency (in dB). Fig.10 The simulation diagram shows the current and electric field of the first feeding antenna 11 (1 / 4 wavelength antenna) coupled to the first parasitic antenna 21 (1 / 2 wavelength antenna) at the low frequency LTE B20 (791 MHz to 862 MHz).

[0102] Figures 8 to 10 In the corresponding example structure, the first feeding antenna 11 is a frame antenna in the form of an inverted F antenna. The first parasitic antenna 21 is a frame antenna. When the first part 10 and the second part 20 are in an open state, the first feeding antenna 11 is located at the upper right corner of the electronic device 100, and the first parasitic antenna 21 is located at the lower right corner of the electronic device 100. The frame thickness of the electronic device 100 is about 4 mm and the width is about 3 mm. The width of the clearance area between the frame of the electronic device 100 and the ground plate 70 is about 1 mm. The partition width between two adjacent metal segments in the frame of the electronic device 100 is about 1.5 mm. The insulating material used in the insulating segment between the two adjacent metal segments and the insulating material filled in the clearance area between the frame of the electronic device 100 and the ground plate 70 has a dielectric constant of 3.0 and a loss angle of 0.01. The rotating part 50 of the first part 10 and the second part 20 is located in the central area of ​​the electronic device 100. When the first part 10 and the second part 20 are in a closed state, a distance between the frame 101 of the first part 10 and the frame 201 of the second part 20 in a thickness direction of the electronic device 100 is about 1 mm.

[0103] Depend on Figure 8 and Fig. 9It can be seen that in the low frequency band, when the first feeding antenna 11 is coupled with the first parasitic antenna 21, the first excitation resonance signal generated by the first parasitic antenna 21 broadens the bandwidth of the first feeding antenna 11, and weakens the adverse effects of the shortened length of the ground plate 70 and the overlapping of the frame on the antenna performance in the closed state, so that the antenna performance of the first feeding antenna 11 is better.

[0104] exist Fig.10 , the first to third figures of the first row respectively represent: in the 810MHz frequency band, when the first part 10 and the second part 20 are in a closed state, the current schematic diagram of the first feeding antenna 11, the current schematic diagram of the first parasitic antenna 21, and the electric field schematic diagram when the first feeding antenna 11 is coupled to the first parasitic antenna 21; the first to third figures of the second row respectively represent: in the 840MHz frequency band, when the first part 10 and the second part 20 are in a closed state, the current schematic diagram of the first feeding antenna 11, the current schematic diagram of the first parasitic antenna 21, and the electric field schematic diagram when the first feeding antenna 11 is coupled to the first parasitic antenna 21. By Fig.10 It can be seen that Figure 8 The resonance of the lower frequency is generated by the first feeding antenna 11, and the resonance of the higher frequency is generated by the first parasitic antenna 21, which is also the first excitation resonance signal.

[0105] Optionally, the first parasitic antenna 21 can have a variety of structural forms. For example, the first parasitic antenna 21 is a part of the frame 201 of the second part 20 of the electronic device 100 or is fixed to the inner side of the frame 201 of the second part 20. In this embodiment, the first parasitic antenna 21 is taken as an example to be a part of the frame 201 of the second part 20. Among them, the frame 201 of the second part 20 includes at least two metal segments and at least one insulating segment for electrically isolating the at least two metal segments. The first parasitic antenna 21 can be formed on one of the metal segments. In other embodiments, the first parasitic antenna 21 is fixed to the inner side of the frame 201 of the second part 20. At this time, the structural form of the first parasitic antenna 21 can be a flexible circuit board, laser direct structuring (LDS) metal, in-mold injection metal or printed circuit board routing.

[0106] Please continue reading Figure 6 Optionally, a matching circuit may be provided between the first feeding circuit 12 and the first feeding antenna 11, and the matching circuit is used to match the characteristic impedance. The matching circuit may include at least one circuit component. For example, the matching circuit may include at least one of a resistor, an inductor, and a capacitor as a lumped element. For example, the matching circuit may include at least one of a microstrip line and a strip line as a distributed element.

[0107] Please continue reading Figure 6and Figure 7 Optionally, the second part 20 further includes a second feeding antenna 31. The second feeding antenna 31 is electrically isolated from the first parasitic antenna 21. When the first part 10 and the second part 20 are in an open state, the first parasitic antenna 21 can couple with the second feeding antenna 31 to generate a second excitation resonance signal. The number of the second excitation resonance signals can be one or more.

[0108] In this embodiment, the first parasitic antenna 21 can be coupled with the second feeding antenna 31 when the first part 10 and the second part 20 are in an open state, and a coupling capacitance is generated between the first parasitic antenna 21 and the second feeding antenna 31, so that the coupling excitation can generate a second excitation resonance signal. When the second feeding antenna 31 is working, the radio frequency energy of the second feeding antenna 31 is transmitted to the first parasitic antenna 21 by coupling, thereby exciting an additional resonance mode on the first parasitic antenna 21, thereby expanding the radiation bandwidth of the antenna and improving the antenna performance of the electronic device 100. Since the first parasitic antenna 21 can be coupled with the first feeding antenna 11 when the first part 10 and the second part 20 are in a closed state, and coupled with the second feeding antenna 31 when the first part 10 and the second part 20 are in an open state, the electronic device 100 can reuse the first parasitic antenna 21, thereby improving the utilization rate of the antenna.

[0109] Optionally, when the first part 10 and the second part 20 are in the open state, the first feeding antenna 11, the second feeding antenna 31 and the first parasitic antenna 21 are respectively located at different vertex areas of the electronic device 100. At this time, the first feeding antenna 11 and the second feeding antenna 31 can operate in similar frequency bands, and both have a large space, and the degree of mutual interference is small. The first parasitic antenna 21 can also be better coupled with the first feeding antenna 11 and the second feeding antenna 31 in the two states.

[0110] In one embodiment, the second part 20 further includes a second feeding circuit 32 and a second grounding circuit 33. The second grounding circuit 33 is connected to one end of the second feeding antenna 31, and is used to ground the second feeding antenna 31. One end of the second feeding antenna 31 connected to the second grounding circuit 33 is a grounding end. The other end of the second feeding antenna 31 (i.e., the end away from the grounding end) is an open end that is not grounded. The second feeding circuit 32 is connected to the second feeding antenna 31. The second feeding circuit 32 is used to feed the second feeding antenna 31. The access position of the second feeding circuit 32 on the second feeding antenna 31 is located between the access position of the second grounding circuit 33 on the second feeding antenna 31 and the open end of the second feeding antenna 31. At this time, the second feeding antenna 31 is a grounded 1 / 4 wavelength antenna. When the first part 10 and the second part 20 are in an open state, the first parasitic antenna 21 is grounded. At this time, the electrical length of the first parasitic antenna 21 is 1 / 4 wavelength, that is, the first parasitic antenna 21 is a 1 / 4 wavelength antenna. The electrical length of the first parasitic antenna 21 is adjustable so as to have different electrical lengths in different use environments.

[0111] In this embodiment, the coupling effect between the first parasitic antenna 21 and the second feeding antenna 31 is very good, and the bandwidth of the second feeding antenna 31 can be greatly expanded. To improve the coupling effect, in one example, the end of the second feeding antenna 31 away from the first parasitic antenna 21 is a grounded end, and the end of the second feeding antenna 31 close to the first parasitic antenna 21 is an open end.

[0112] For example, please refer to Fig.11 and Fig.12 , Fig.11 yes Figure 6 A reflection coefficient curve diagram of another exemplary structure of the antenna architecture shown, Fig.12 yes Figure 6 The efficiency curve diagram of another example structure of the antenna architecture shown. Fig.11 and Fig.12 The comparison results of the second feeding antenna 31 (1 / 4 wavelength antenna) in two frequency bands, low-frequency LTE B20 (791 MHz to 862 MHz) and LTE B8 (880 MHz to 960 MHz), are shown. Fig.11 and Fig.12 , the solid line represents the performance when the second feeding antenna 31 is not coupled to the first parasitic antenna 21 and the first part 10 and the second part 20 are in the open state, and the dotted line represents the performance when the second feeding antenna 31 is coupled to the first parasitic antenna 21 (1 / 2 wavelength antenna) and the first part 10 and the second part 20 are in the open state. Fig.11 The horizontal axis represents the frequency (in GHz), and the vertical axis represents the reflection coefficient (in dB). Fig.12The horizontal axis represents frequency (in GHz), and the vertical axis represents efficiency (in dB).

[0113] Fig.11 and Fig.12 In the corresponding example structure, the second feeding antenna 31 is a frame antenna in the form of an inverted F antenna. The first parasitic antenna 21 is a frame antenna. When the first part 10 and the second part 20 are in an open state, the second feeding antenna 31 is located at the lower left corner of the electronic device 100, and the first parasitic antenna 21 is located at the lower right corner of the electronic device 100. The frame thickness of the electronic device 100 is about 4 mm and the width is about 3 mm. The width of the clearance area between the frame of the electronic device 100 and the ground plate 70 is about 1 mm. The partition width between two adjacent metal segments in the frame of the electronic device 100 is about 1.5 mm. The dielectric constant of the insulating material used in the insulating segment between the two adjacent metal segments and the insulating material filled in the clearance area between the frame of the electronic device 100 and the ground plate 70 is 3.0 and the loss angle is 0.01. The rotating part 50 of the first part 10 and the second part 20 is located in the central area of ​​the electronic device 100. When the first part 10 and the second part 20 are in a closed state, a distance between the frame 101 of the first part 10 and the frame 201 of the second part 20 in a thickness direction of the electronic device 100 is about 1 mm.

[0114] Depend on Fig.11 and Fig.12 It can be seen that in the low frequency band, when the second feeding antenna 31 is coupled with the first parasitic antenna 21 , the second excitation resonance signal generated by the first parasitic antenna 21 broadens the bandwidth of the second feeding antenna 31 , making the antenna performance of the second feeding antenna 31 better.

[0115] Please continue reading Figure 6 Optionally, a matching circuit may be provided between the second feeding circuit 32 and the second feeding antenna 31, and the matching circuit is used to match the characteristic impedance. The matching circuit may include at least one circuit component. For example, the matching circuit may include at least one of a resistor, an inductor, and a capacitor as a lumped element. For example, the matching circuit may include at least one of a microstrip line and a strip line as a distributed element.

[0116] It can be understood that when the parasitic antenna is not grounded, the electrical length of the parasitic antenna is N / 2 wavelengths, where N is a positive integer. When the parasitic antenna is grounded, the electrical length of the parasitic antenna is M / 4 wavelengths, where M is a positive odd number.

[0117] In other embodiments, when the first part 10 and the second part 20 are in the open state, the first parasitic antenna 21 can also be grounded (that is, the first parasitic antenna 21 is a 1 / 2 wavelength antenna). At this time, the coupling effect between the first parasitic antenna 21 and the second feeding antenna 31 is worse than that in the aforementioned embodiment, but the bandwidth of the second feeding antenna 31 can still be expanded.

[0118] Optional, such as Figure 6 As shown, the second part 20 also includes a switching circuit 22. One end of the switching circuit 22 is connected to the first parasitic antenna 21, and the other end is grounded. The switching circuit 22 is used to connect or disconnect the first parasitic antenna 21 and the ground so that the electrical length of the first parasitic antenna 21 can be adjusted. For example, the switching circuit 22 is used to disconnect the first parasitic antenna 21 from the ground when the first part 10 and the second part 20 are in a closed state. At this time, the electrical length of the first parasitic antenna 21 is 1 / 2 wavelength. The switching circuit 22 is also used to connect the first parasitic antenna 21 to the ground when the first part 10 and the second part 20 are in an open state. At this time, the electrical length of the first parasitic antenna 21 is 1 / 4 wavelength.

[0119] In this embodiment, the configuration of the switching circuit 22 makes the electrical length of the first parasitic antenna 21 adjustable, and the first parasitic antenna 21 can achieve different coupling effects when the electronic device 100 is in different use states, thereby achieving the effect of multiplexing the antenna.

[0120] In one example, the switching circuit 22 may include a tuning switch 221. The switching circuit 22 switches the connection relationship between the first parasitic antenna 21 and the ground by switching the connection and disconnection states of the tuning switch 221, so that the electrical length of the first parasitic antenna 21 is adjustable. For example, the tuning switch 221 can be connected roughly to the middle of the first parasitic antenna 21. In the present application, the middle of the antenna includes the middle position and other positions slightly deviated from the middle position, and the middle of the antenna is located between the two ends of the antenna. The middle of the first parasitic antenna 21 is located between the two ends of the first parasitic antenna 21.

[0121] In another example, the switching circuit 22 may include a tuning switch and a first matching branch and a second matching branch. The first matching branch is different from the second matching branch. The control end of the tuning switch is connected to the first parasitic antenna 21, and the two selection ends of the tuning switch are connected to the first matching branch and the second matching branch. The switching circuit 22 switches the connection between the first matching branch and the second matching branch through the control end of the tuning switch, switches the connection relationship between the first parasitic antenna 21 and the ground, so that the electrical length of the first parasitic antenna 21 is adjustable.

[0122] The tuning switch 221 of the switching circuit 22 is electrically connected to the processor 40. The processor 40 controls the switching state of the tuning switch 221 according to the sensing signal of the sensing device 30, so that the switching circuit 22 can accurately adjust the electrical length of the first parasitic antenna 21 according to the state of the first part 10 and the second part 20, thereby making the antenna performance of the electronic device 100 more reliable.

[0123] Optional, such as Figure 6 As shown, the first part 10 also includes a second parasitic antenna 41. When the first part 10 and the second part 20 are in a closed state, the second parasitic antenna 41 is not grounded and can be coupled with the second feeding antenna 31 to generate a third excitation resonance signal. At this time, the second parasitic antenna 41 is a 1 / 2 wavelength antenna. Wherein, the second parasitic antenna 41 can be located in the upper left corner of the electronic device 100 when the first part 10 and the second part 20 are in an open state. The second parasitic antenna 41 and the first feeding antenna 11, the second feeding antenna 31 and the first parasitic antenna 21 are respectively located in different vertex areas of the electronic device 100. Wherein, when the first part 10 and the second part 20 are in an open state, the second parasitic antenna 41 can be coupled with the first feeding antenna 11 to generate a fourth excitation resonance signal. At this time, the second parasitic antenna 41 can be grounded. Wherein, the structural design of the second parasitic antenna 41 can refer to the first parasitic antenna 21. For example, the first part 10 may also include a switching circuit connected between the second parasitic antenna 41 and the ground (refer to the aforementioned switching circuit 22). In other embodiments, when the first part 10 and the second part 20 are in the open state, the second parasitic antenna 41 may also be ungrounded and coupled to the first feeding antenna 11 .

[0124] Optional, in Figure 6 In the antenna architecture shown, by designing the physical length of the metal segment where the first parasitic antenna 21 is located and the switching circuit 22, the first parasitic antenna 21 switches between the grounded state and the ungrounded state, that is, the electrical length of the first parasitic antenna 21 switches between 1 / 2 wavelength and 1 / 4 wavelength. When the above design is difficult to meet the adjustment requirements of the electrical length of the first parasitic antenna 21, one or more tuning circuits can be connected to the first parasitic antenna 21, and through the cooperation of one or more tuning circuits, the electrical length of the first parasitic antenna 21 meets the adjustment requirements.

[0125] For example, see Fig.13 , Fig.13 yes Figure 1 The antenna structure of the electronic device is shown in another embodiment. Most of the technical contents of the antenna structure shown in this embodiment are the same as those of the antenna structure shown in the previous embodiment and will not be described in detail.

[0126] The second part 20 also includes one or more first tuning circuits 23. One or more first tuning circuits 23 are connected to the first parasitic antenna 21. The first tuning circuit 23 is used to adjust the electrical length of the first parasitic antenna 21. Among them, one or more first tuning circuits 23 can be connected to the end of the first parasitic antenna 21 to better play a tuning role. For example, the second part 20 includes two first tuning circuits 23, and the two first tuning circuits 23 are respectively connected to the two ends of the first parasitic antenna 21. Of course, in other implementations, the access position of one or more first tuning circuits 23 on the first parasitic antenna 21 can also have other ways, and this application does not strictly limit this.

[0127] The first tuning circuit 23 may include one or more of a switch, a capacitor, an inductor, or a low-pass high-impedance filter. The present application does not strictly limit the specific structure of the first tuning circuit 23.

[0128] See also Fig.14 , Fig.14 yes Figure 1 The antenna structure of the electronic device is shown in a schematic diagram in another embodiment. Most of the technical contents of the antenna structure shown in this embodiment, which are the same as those of the antenna structure shown in the previous embodiment, will not be repeated.

[0129] In this embodiment, the second feeding antenna 31 is located in the side area of ​​the second part 20, not in the vertex area. When the first part 10 and the second part 20 are in a closed state, the second parasitic antenna 41 located in the vertex area can also be coupled with the second feeding antenna 31. In this embodiment, since the second feeding antenna 31 is far away from the first parasitic antenna 21, it is no longer coupled with the first parasitic antenna 21.

[0130] Similarly, in some examples, the first feeding antenna 11 may also be located in the side area of ​​the first part 10. When the first part 10 and the second part 20 are in a closed state, the first parasitic antenna 21 located in the vertex area can be coupled with the first feeding antenna 11. The first feeding antenna 11 is no longer coupled with the second parasitic antenna 41. In this example, when the first part 10 and the second part 20 are in an open state, the first feeding antenna 11 and the second feeding antenna 31 may be located on both sides of the electronic device 100, so that the first feeding antenna 11 and the second feeding antenna 31 both have sufficient radiation space.

[0131] See also Fig.15 , Fig.15 yes Figure 1 The antenna structure of the electronic device is shown in a schematic diagram in another embodiment. Most of the technical contents of the antenna structure shown in this embodiment, which are the same as those of the antenna structure shown in the previous embodiment, will not be repeated.

[0132] The second part 20 also includes a third feeding circuit 52 and a first filtering circuit 53. The third feeding circuit 52 and the first filtering circuit 53 are connected to different positions of the first parasitic antenna 21, and are used to form a third feeding antenna 51 on the first parasitic antenna 21. The radiation frequency band of the third feeding antenna 51 is different from the radiation frequency band of the first feeding antenna 11. For example, the first feeding antenna 11 is a low-frequency band antenna. The radiation frequency band of the third feeding antenna 51 is a wireless LAN antenna, a short-range wireless communication antenna, a medium-high frequency band antenna, a Sub 6G antenna (frequency lower than 6GHz) or a wireless charging antenna, etc. At this time, the first filtering circuit 53 has a low-resistance high-pass characteristic. For example, the first filtering circuit 53 includes a high-pass low-resistance filter 531.

[0133] At this time, the third feeding antenna 51 and the first parasitic antenna 21 share the same radiator, which can improve the antenna utilization rate. In addition, since the radiation frequency band of the third feeding antenna 51 is different from the radiation frequency band of the first feeding antenna 11, the third feeding antenna 51 and the first feeding antenna 11 will not interfere with each other and have good isolation.

[0134] The access positions of the third feeding circuit 52 and the first filtering circuit 53 on the first parasitic antenna 21 may be located between the access position of the switching circuit 22 on the first parasitic antenna 21 and one of the ends of the first parasitic antenna 21. In one example, the first filtering circuit 53 is closer to the middle of the first parasitic antenna 21 than the end of the first parasitic antenna 21. The access position of the third feeding circuit 52 on the first parasitic antenna 21 is located between the access position of the first filtering circuit 53 on the first parasitic antenna 21 and the end of the first parasitic antenna 21.

[0135] For example, see Fig.16 , Fig.16 yes Figure 1 The antenna structure of the electronic device is shown in a schematic diagram in another embodiment. Most of the technical contents of the antenna structure shown in this embodiment, which are the same as those of the antenna structure shown in the previous embodiment, will not be repeated.

[0136] The electronic device 100 also includes a fourth feeding antenna 81, a fourth feeding circuit 82 and a second filtering circuit 83. The fourth feeding antenna 81 is adjacent to the first parasitic antenna 21 and is electrically isolated from each other. The fourth feeding circuit 82 is connected to the fourth feeding antenna 81. The fourth feeding circuit 82 is used to feed the fourth feeding antenna 81. The second filtering circuit 83 is connected to the first parasitic antenna 21. The radiation frequency band of the fourth feeding antenna 81 is different from the radiation frequency band of the first feeding antenna 11. For example, the first feeding antenna 11 is a low-frequency band antenna. The radiation frequency band of the fourth feeding antenna 81 is a wireless LAN antenna, a short-range wireless communication antenna, a medium-high frequency band antenna or a wireless charging antenna, etc. At this time, the second filtering circuit 83 has a low-impedance high-pass characteristic. For example, the second filtering circuit 83 includes a high-pass low-impedance filter 831.

[0137] At this time, the radiator part where the first parasitic antenna 21 is located is reused as a parasitic branch of the fourth feeding antenna 81, which can improve the antenna utilization rate. In addition, since the radiation frequency band of the fourth feeding antenna 81 is different from the radiation frequency band of the first feeding antenna 11, the fourth feeding antenna 81 and the first feeding antenna 11 will not interfere with each other, and have good isolation.

[0138] The fourth feeding antenna 81 may be located in the first part 10 or the second part 20. The access position of the fourth feeding antenna 81 on the first parasitic antenna 21 is located between the access position of the switching circuit 22 on the first parasitic antenna 21 and the fourth feeding antenna 81.

[0139] In other embodiments, the antenna architecture may further include more feeding antennas, which may use different radiators from the aforementioned first feeding antenna 11, first parasitic antenna 21, second feeding antenna 31, second parasitic antenna 22, etc., or may reuse the same radiator. This application does not make strict limitations on this.

[0140] Please also read Fig.17 and Fig.18 , Fig.17 yes Figure 1 A schematic diagram of an antenna structure of an electronic device in another embodiment is shown, Fig.18 yes Fig.17 The schematic diagram of the antenna structure shown in another use state. Fig.17 This corresponds to the first part 10 and the second part 20 being in an open state. Fig.18 This corresponds to the first part 10 and the second part 20 being in a closed state. Fig.18In the embodiment, since the antennas located at the first part 10 and the second part 20 overlap in the closed state, the antennas of the first part 10 and the second part 20 are staggered so that the antennas of the first part 10 are located outside the antennas of the second part 20. Most of the technical contents of the antenna architecture shown in this embodiment, which are the same as those of the antenna architecture shown in the above embodiment, are not repeated here.

[0141] The second part 20 also includes a second feeding antenna 31, a second feeding circuit 32 and a second grounding circuit 33. The second feeding antenna 31 is electrically isolated from the first parasitic antenna 21. The second grounding circuit 33 is connected to the middle of the second feeding antenna 31. Both ends of the second feeding antenna 31 are open ends that are not grounded. The second feeding circuit 32 is connected to the second feeding antenna 31 for feeding the second feeding antenna 31. The access position of the second feeding circuit 32 on the second feeding antenna 31 is located between the access position of the second grounding circuit 33 on the second feeding antenna 31 and one end of the second feeding antenna 31. At this time, the second feeding antenna 31 is a 1 / 2 wavelength antenna. The first parasitic antenna 21 is a floating antenna. That is, the first parasitic antenna 21 is not grounded.

[0142] In this embodiment, when the first part 10 and the second part 20 are in the open state, the second feeding antenna 31 has two antenna mode coverages, has a larger bandwidth, and has better antenna performance, so the second feeding antenna 31 can be uncoupled with the first parasitic antenna 21. When the first part 10 and the second part 20 are in the closed state, the first feeding antenna 11 is coupled with the first parasitic antenna 21 of 1 / 2 wavelength to improve the antenna performance of the first feeding antenna 11 and reduce the adverse effects of the external environment. At this time, the antenna architecture does not need to switch different coupling antenna forms when the first part 10 and the second part 20 are in different states, that is, the first parasitic antenna 21 can be a single 1 / 2 wavelength antenna, and there is no need to set the switching circuit 22, so that the structure of the antenna architecture is simpler.

[0143] For example, please refer to Figures 19 to 21 , Fig.19 yes Fig.17 A reflection coefficient curve diagram of the second feeding antenna 31 of an exemplary structure of the antenna architecture shown in FIG. Fig. 20 yes Fig.17 The efficiency curve diagram of the second feeding antenna 31 of an exemplary structure of the antenna architecture shown in FIG. Fig.21 yes Fig.17 The simulation diagram of the current, electric field and radiation direction of the second feeding antenna 31 of an exemplary structure of the antenna architecture shown. Figures 19 to 21 This corresponds to an exemplary structure when the first portion 10 and the second portion 20 are in an open state and the second feeding antenna 31 is not coupled to the first parasitic antenna 21 . Fig. 20 The horizontal axis represents the frequency (in GHz), and the vertical axis represents the reflection coefficient (in dB). Fig.21 The horizontal axis represents frequency (in GHz), and the vertical axis represents efficiency (in dB). Fig.21 2 and 3 correspond to the simulation diagrams of the second feeding antenna 31 at 890 MHz and 960 MHz respectively.

[0144] Figures 19 to 21 In the corresponding example structure, the second feeding antenna 31 is a 1 / 2 wavelength antenna. The second feeding antenna 31 is a frame antenna. The frame of the electronic device 100 has a thickness of about 4 mm and a width of about 3 mm. The width of the clearance area between the frame of the electronic device 100 and the ground plate 70 is about 1 mm. The width of the partition between two adjacent metal segments in the frame of the electronic device 100 is about 1.5 mm. The insulating material used in the insulating segment between the two adjacent metal segments and the insulating material filled in the clearance area between the frame of the electronic device 100 and the ground plate 70 have a dielectric constant of 3.0 and a loss angle of 0.01.

[0145] Depend on Figures 19 to 21 It can be seen that when the second feeding antenna 31 is a 1 / 2 wavelength antenna, the second feeding antenna 31 has two antenna mode coverages, a larger bandwidth, and better antenna performance.

[0146] It can be understood that, in some embodiments, the second feeding antenna 31 can also be coupled to the first parasitic antenna 21. Although it is necessary to add a switching circuit to the first parasitic antenna 21 (see the aforementioned switching circuit 22), it also improves the antenna performance of the second feeding antenna 31 when the first part 10 and the second part 20 are in the open state to a certain extent.

[0147] Optional, such as Fig.17 As shown, the first feeding antenna 11 may be a 1 / 2 wavelength antenna. When the first part 10 and the second part 20 are in an open state, the antenna performance of the first feeding antenna 11 may refer to the second feeding antenna 31.

[0148] At this time, when the first part 10 and the second part 20 are in the open state, the first feeding antenna 11 and the second feeding antenna 31 can be respectively located at two diagonally arranged vertex areas of the electronic device 100. The first parasitic antenna 21 and the second parasitic antenna 41 of the electronic device 100 can be respectively located at the other two diagonally arranged vertex areas of the electronic device 100.

[0149] For example, please refer to Figure 22 to Figure 23 , Fig. 22 yes Fig.17 A reflection coefficient curve diagram of an exemplary structure of the antenna architecture shown, Fig.23 yes Fig.17The efficiency curve of an example structure of the antenna architecture shown in FIG. Fig. 22 and Fig.23 , the solid line represents the performance of the first feeding antenna 11 (1 / 2 wavelength antenna) coupled to the first parasitic antenna 21 with an electrical length of 1 / 2 wavelength when the first part 10 and the second part 20 are in a closed state, the dashed line represents the performance of the first feeding antenna 11 (1 / 2 wavelength antenna) coupled to the first parasitic antenna 21 with an electrical length of 1 / 4 wavelength when the first part 10 and the second part 20 are in a closed state, and the dot-dash line represents the performance of the first feeding antenna 11 (1 / 2 wavelength antenna) not coupled to the first parasitic antenna 21 when the first part 10 and the second part 20 are in an open state. Fig. 22 The horizontal axis represents the frequency (in GHz), and the vertical axis represents the reflection coefficient (in dB). Fig.23 The horizontal axis represents frequency (in GHz), and the vertical axis represents efficiency (in dB).

[0150] Figure 22 to Figure 23 In the corresponding example structure, the first feeding antenna 11 is a frame antenna. The first parasitic antenna 21 is a frame antenna. When the first part 10 and the second part 20 are in the open state, the first feeding antenna 11 is located at the upper right corner of the electronic device 100, and the first parasitic antenna 21 is located at the lower right corner of the electronic device 100. The frame thickness of the electronic device 100 is about 4 mm and the width is about 3 mm. The width of the clearance area between the frame of the electronic device 100 and the ground plate 70 is about 1 mm. The partition width between two adjacent metal segments in the frame of the electronic device 100 is about 1.5 mm. The insulating material used in the insulating segment between the two adjacent metal segments and the insulating material filled in the clearance area between the frame of the electronic device 100 and the ground plate 70 have a dielectric constant of 3.0 and a loss angle of 0.01. The rotating part 50 of the first part 10 and the second part 20 is located in the central area of ​​the electronic device 100. When the first part 10 and the second part 20 are in a closed state, a distance between the frame 101 of the first part 10 and the frame 201 of the second part 20 in a thickness direction of the electronic device 100 is about 1 mm.

[0151] Depend on Fig. 22 and Fig.23 It can be seen that when the first feeding antenna 11 is coupled with the first parasitic antenna 21, the first excitation resonance signal generated by the coupled excitation of the first parasitic antenna 21 is generated at the highest resonance. The antenna performance of the first feeding antenna 11 when the first part 10 and the second part 20 are in a closed state and coupled with the first parasitic antenna 21 with an electrical length of 1 / 2 wavelength is slightly lower than the antenna performance when the first part 10 and the second part 20 are in an open state, but better than the antenna performance when the first part 10 and the second part 20 are in a closed state and coupled with the first parasitic antenna 21 with an electrical length of 1 / 4 wavelength.

[0152] Optionally, the electronic device 100 further includes one or more second tuning circuits (not shown). The one or more second tuning circuits are connected to the first parasitic antenna 21, and are used to adjust the frequency band of the excitation resonance of the first parasitic antenna 21, so that when the first feeding antenna 11 is coupled with the first parasitic antenna 21, a more ideal antenna performance can be obtained. Of course, in other embodiments, the physical length of the first parasitic antenna 21 can be adjusted synchronously or individually, so that when the first feeding antenna 11 is coupled with the first parasitic antenna 21, a more ideal antenna performance can be obtained.

[0153] Optional, please continue to Fig.17 and Fig.18 , the electronic device 100 also includes a fifth feeding antenna 61, a fifth feeding circuit 62, a fifth grounding circuit 63 and a third parasitic antenna 71. The fifth feeding antenna 61 is located in the second part 20, and the third parasitic antenna 71 is located in the first part 10 (in other embodiments, the fifth feeding antenna 61 can be located in the first part 10, and the third parasitic antenna 71 is located in the second part 20). The fifth feeding antenna 61 is electrically isolated from the first parasitic antenna 21 and the second feeding antenna 31. The fifth feeding circuit 62 is connected to the fifth feeding antenna 61 for feeding the fifth feeding antenna 61. The fifth grounding circuit 63 is connected to the fifth feeding antenna 61 for grounding the fifth feeding antenna 61. When the first part 10 and the second part 20 are in a closed state, the third parasitic antenna 71 is not grounded and can be coupled with the fifth feeding antenna 61 to generate a fifth excitation resonance signal. At this time, the electrical length of the third parasitic antenna 71 is 1 / 2 wavelength, that is, the third parasitic antenna 71 is a 1 / 2 wavelength antenna. In this implementation, the fifth feeding antenna 61 can be used to radiate medium and high frequency signals.

[0154] See also Fig.24 , Fig.24 yes Figure 1 The antenna structure of the electronic device shown is a schematic diagram in another embodiment. Fig.24 The first part 10 and the second part 20 are in an open state. Most of the technical contents of the antenna structure shown in this embodiment are the same as those of the antenna structure shown in the above embodiment and are not described in detail.

[0155] In this embodiment, the second feeding antenna 31 is located in the first part 10, but not in the second part 20. Specifically, the first part 10 further includes the second feeding antenna 31, and the second feeding antenna 31 is electrically isolated from the first feeding antenna 11. At this time, the second parasitic antenna 41 is located in the second part 20, but not in the first part 10, so that it can be coupled with the second feeding antenna 31 when the first part 10 and the second part 20 are in a closed state.

[0156] The first feeding antenna 11 and the second feeding antenna 31 are arranged as far away from each other as possible, so that the first feeding antenna 11 and the second feeding antenna 31 both have sufficient radiation space.

[0157] In the present application, the first feeding antenna 11, the first parasitic antenna 21, the second feeding antenna 31 and the second parasitic antenna 41 can be arranged in a variety of ways. When the first part 10 and the second part 20 are in a closed state, the first feeding antenna 11 is coupled to the first parasitic antenna 21, and the second feeding antenna 31 is coupled to the second parasitic antenna 41. The present application does not make strict limitations on this.

[0158] Please also read Fig.25 and Fig.26 , Fig.25 is a schematic diagram of the structure of the electronic device of the embodiment of the present application in the second embodiment, Fig.26 yes Fig.25 Schematic diagram of the antenna structure of the electronic device shown. Most of the technical contents of the electronic device 100 shown in the second embodiment that are the same as those of the electronic device 100 shown in the first embodiment are not described in detail.

[0159] In the second embodiment, the rotating part 50 deviates from the central area of ​​the electronic device 100, rather than being located in the central area of ​​the electronic device 100. Specifically, the electronic device 100 further includes a rotating part 50, which connects the first part 10 and the second part 20, and the rotating part 50 can be deformed so that the first part 10 and the second part 20 rotate relative to each other to fold or unfold. The rotating part 50 deviates from the central area of ​​the electronic device 100. At this time, the deviation between the center line of the rotating part 50 and the center line of the electronic device 100 is large. When the first part 10 and the second part 20 are in a closed state, the end of one of the first part 10 or the second part 20 protrudes relative to each other. For example, in this embodiment, the rotating part 50 extends along the first direction X. In the second direction perpendicular to the first direction X, the length of the second part 20 is greater than the length of the first part 10, and when the first part 10 and the second part 20 are in a closed state, the end of the second part 20 away from the first part 10 protrudes relative to the first part 10. When the first part 10 and the second part 20 are in a closed state, the frame 101 of the first part 10 and the frame 201 of the second part 20 partially overlap. That is, the frame 101 of the first part 10 and the frame 201 of the second part 20 are arranged opposite to each other.

[0160] When the first part 10 and the second part 20 are in an open state, the electronic device 100 includes two side edges 1001 across the rotating part 50. The two side edges 1001 extend along the first direction X. The first feeding antenna 11 and the first parasitic antenna 21 are located on the same side edge 1001. At this time, when the first part 10 and the second part 20 are in a closed state, the first feeding antenna 11 and the first parasitic antenna 21 can be coupled to each other. The second feeding antenna 31 and the first feeding antenna 11 are located on different side edges 1001. At this time, the first feeding antenna 11 and the second feeding antenna 31 both have a large radiation space.

[0161] The first parasitic antenna 21 may extend from the side 1001 of the electronic device 100 along the edge of the vertex region to another edge 1002 of the electronic device 100. The second parasitic antenna 41 may extend from another side 1001 of the electronic device 100 along another vertex region to another edge 1003 of the electronic device 100.

[0162] See also Fig. 27 , Fig. 27 1 is a schematic diagram of the structure of the electronic device of the present application in the third embodiment. Most of the technical contents of the electronic device 100 shown in the third embodiment that are the same as those of the electronic device 100 shown in the above embodiment will not be repeated.

[0163] The sizes of the first part 10 and the second part 20 of this embodiment are slightly different from those of the first part 10 and the second part 20 of the previous embodiment. The rotating part 50 of this embodiment extends along the second direction Y. The conventional flipping mode of the first part 10 and the second part 20 of this embodiment is left-right flipping, while the conventional flipping mode of the previous embodiment is up-down flipping. Among them, the conventional flipping mode of the first part 10 and the second part 20 of the electronic device 100 corresponds to the setting positions of some components in the electronic device 100, such as the position of the earpiece, the position of the front camera, etc.

[0164] See also Fig.28 , Fig.28 yes Fig. 27 A schematic diagram of an antenna structure of an electronic device in one embodiment is shown.

[0165] The first part 10 includes a first feeding antenna 11 and a second parasitic antenna 41. The second part 20 includes a second feeding antenna 31 and a first parasitic antenna 21. When the first part 10 and the second part 20 are in an open state, the first feeding antenna 11, the second parasitic antenna 41, the second feeding antenna 31 and the first parasitic antenna 21 are respectively located at four vertex areas of the electronic device 100. When the first part 10 and the second part 20 are in a closed state, the first feeding antenna 11 is coupled to the first parasitic antenna 21 having an electrical length of 1 / 2 wavelength, and the second feeding antenna 31 is coupled to the second parasitic antenna 41 having an electrical length of 1 / 2 wavelength.

[0166] In this embodiment, the first feeding antenna 11 and the second feeding antenna 31 are 1 / 2 wavelength antennas, and the first parasitic antenna 21 and the second parasitic antenna 41 are suspended 1 / 2 wavelength antennas.

[0167] In other implementations, the first feeding antenna 11 and the second feeding antenna 31 may also be 1 / 4 wavelength antennas. In this case, the first parasitic antenna 21 and the second parasitic antenna 41 are both connected to a switching circuit (refer to the aforementioned switching circuit 22 ), and the switching circuit is used to switch the electrical length of the antenna.

[0168] See also Fig.29 , Fig.29 yes Fig. 27 A schematic diagram of an antenna structure of an electronic device in another embodiment is shown.

[0169] The first part 10 includes a first feeding antenna 11 and a second feeding antenna 31. The second part 20 includes a first parasitic antenna 21 and a second parasitic antenna 41. When the first part 10 and the second part 20 are in an open state, the first feeding antenna 11, the second parasitic antenna 41, the second feeding antenna 31 and the first parasitic antenna 21 are respectively located at four vertex areas of the electronic device 100. When the first part 10 and the second part 20 are in a closed state, the first feeding antenna 11 is coupled to the first parasitic antenna 21 having an electrical length of 1 / 2 wavelength, and the second feeding antenna 31 is coupled to the second parasitic antenna 41 having an electrical length of 1 / 2 wavelength.

[0170] In this embodiment, the first feeding antenna 11 and the second feeding antenna 31 are 1 / 4 wavelength antennas, and the first parasitic antenna 21 and the second parasitic antenna 41 are both connected to a switching circuit (refer to the aforementioned switching circuit 22), which is used to switch the electrical length of the antenna.

[0171] In other implementations, the first feeding antenna 11 and the second feeding antenna 31 may also be 1 / 2 wavelength antennas. In this case, the first parasitic antenna 21 and the second parasitic antenna 41 are suspended 1 / 2 wavelength antennas.

[0172] In the above-mentioned embodiment, the first part 10 and the second part 20 switch between the open state and the closed state by relative rotation. In other embodiments, the first part 10 and the second part 20 can also switch between the open state and the closed state by relative sliding. For example:

[0173] See also Fig.30 , Fig.30 1 is a schematic diagram of the structure of the electronic device of the present application in the fourth embodiment. Most of the technical contents of the electronic device 100 shown in the third embodiment that are the same as those of the electronic device 100 shown above are not repeated here.

[0174] The electronic device 100 includes a first part 10 and a second part 20. The first part 10 is slidably connected to the second part 20. When the first part 10 and the second part 20 slide relative to each other, they can be relatively folded to a closed state, and can also be relatively unfolded to an open state. When the first part 10 and the second part 20 are in a closed state, the first part 10 and the second part 20 are in an up and down stacking manner. When the first part 10 and the second part 20 are in an open state, a small part of the first part 10 and the second part 20 remain in a stacked state, and most of the areas are in a staggered state, that is, an unfolded state. In one embodiment, when the first part 10 and the second part 20 are in an open state, the first part 10 and the second part 20 can also be arranged completely staggered.

[0175] In this embodiment, the first portion 10 is located above the second portion 20. In other embodiments, the first portion 10 may also be located below the second portion 20.

[0176] Please also read Fig.31 and Fig.32 , Fig.31 yes Fig.30 A schematic diagram of the antenna architecture of the electronic device shown, Fig.32 yes Fig.31 The schematic diagram of the antenna structure shown in another use state. Fig.31 This corresponds to the structure when the first part 10 and the second part 20 are in the open state. Fig.32 This corresponds to the structure when the first part 10 and the second part 20 are in a closed state. Fig.32 In the figure, since the antennas located in the first part 10 and the second part 20 will overlap when in a closed state, the antenna of the first part 10 and the antenna of the second part 20 are staggered so that the antenna of the first part 10 is located outside the antenna of the second part 20.

[0177] The first part 10 includes a first feeding antenna 11, and the second part 20 includes a first parasitic antenna 21. When the first part 10 and the second part 20 are in a closed state, the first parasitic antenna 21 is not grounded and can be coupled with the first feeding antenna 11 to generate a first excitation resonance signal. At this time, the electrical length of the first parasitic antenna 21 is 1 / 2 wavelength, that is, the first parasitic antenna 21 is a 1 / 2 wavelength antenna.

[0178] The second part 20 further includes a second feeding antenna 31. When the first part 10 and the second part 20 are in a closed state, the first feeding antenna 11 and the second feeding antenna 31 are respectively located at two diagonally arranged vertex areas of the electronic device 100. At this time, the first feeding antenna 11 and the second feeding antenna 31 both have sufficient radiation space.

[0179] The first part 10 may further include a second parasitic antenna 41. When the first part 10 and the second part 20 are in a closed state, the second parasitic antenna 41 is not grounded and can be coupled with the second feeding antenna 31 to generate a third excitation resonance signal. At this time, the electrical length of the second parasitic antenna 41 is 1 / 2 wavelength, that is, the second parasitic antenna 41 is a 1 / 2 wavelength antenna.

[0180] In other implementations, the second feeding antenna 31 may also be located in the first portion 10 . The second feeding antenna 31 is electrically isolated from the first feeding antenna 11 and is respectively located in two diagonal vertex regions of the first portion 10 . In this case, the second parasitic antenna 41 is located in the first portion 10 .

[0181] In other embodiments, the first part 10 and the second part 20 can also be switched between the open state and the closed state by other means (such as detachable snap-fitting), which can be determined according to actual needs and is not limited to this in the embodiments of the present application.

[0182] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An electronic device (100), characterized in that: The invention comprises a first part (10) and a second part (20), wherein the first part (10) and the second part (20) can be folded relative to each other to a closed state, and can also be unfolded relative to each other to an open state; when the first part (10) and the second part (20) are in the closed state, a frame (101) of the first part (10) and a frame (201) of the second part (20) partially overlap or completely overlap; The first part (10) comprises a first feeding antenna (11), a first feeding circuit (12) and a first grounding circuit (13), wherein the first feeding circuit (12) is connected to the first feeding antenna (11) and is used to feed the first feeding antenna (11), and the first grounding circuit (13) is connected to the first feeding antenna (11) and is used to ground the first feeding antenna (11); The second part (20) comprises a first parasitic antenna (21), the first parasitic antenna comprising a second metal segment with two open ends, in the closed state, the first parasitic antenna (21) is not grounded and is used to couple with the first feeding antenna (11) to generate a first resonance, the first resonance being used to broaden the bandwidth of the first feeding antenna (11), The second part (20) further comprises a second feeding antenna (31), the second feeding antenna (31) being electrically isolated from the first parasitic antenna (21), and in the open state, the first parasitic antenna (21) being used to couple with the second feeding antenna (31) to generate a second resonance, and the second resonance being used to broaden the bandwidth of the second feeding antenna (31).

2. The electronic device according to claim 1, characterized in that: The first feeding antenna comprises a first metal segment having an open end at one end and a grounded end at the other end. In the closed state, the first feeding antenna is a 1 / 4 wavelength antenna.

3. The electronic device according to claim 1, characterized in that: In the closed state, the first parasitic antenna is a 1 / 2 wavelength antenna.

4. The electronic device according to claim 3, characterized in that: In the closed state, the current of the first parasitic antenna flows from one end to the other end of the first parasitic antenna.

5. The electronic device according to claim 2, characterized in that: In the open state, the first feeding antenna is a 1 / 4 wavelength antenna.

6. The electronic device according to claim 5, characterized in that: In the closed state, the current of the first feeding antenna flows from the ground end to the open end.

7. The electronic device according to claim 1, characterized in that: In the closed state, the first feeding antenna (11) and the first parasitic antenna (21) at least partially overlap and have one ends aligned.

8. The electronic device (100) according to claim 1, characterized in that: The second part (20) further comprises a second feeding circuit (32) and a second grounding circuit (33); the second grounding circuit (33) is connected to one end of the second feeding antenna (31) for grounding the second feeding antenna (31); the other end of the second feeding antenna (31) is an open end that is not grounded; the second feeding circuit (32) is connected to the second feeding antenna (31), and an access position of the second feeding circuit (32) on the second feeding antenna (31) is located between an access position of the second grounding circuit (33) on the second feeding antenna (31) and the open end.

9. The electronic device according to claim 1, characterized in that: When the first part (10) and the second part (20) are in an open state, the first parasitic antenna (21) is grounded and is a 1 / 4 wavelength antenna.

10. The electronic device (100) according to claim 8, characterized in that: The second part (20) further comprises a switching circuit (22), one end of the switching circuit (22) being connected to the first parasitic antenna (21) and the other end being grounded; The switching circuit (22) is used to disconnect the first parasitic antenna (21) from the ground in the closed state; the switching circuit (22) is also used to connect the first parasitic antenna (21) to the ground when the first part (10) and the second part (20) are in the open state.

11. The electronic device (100) according to any one of claims 1 to 10, characterized in that: The second part (20) further comprises one or more first tuning circuits (23), wherein the one or more first tuning circuits (23) are connected to the first parasitic antenna (21), and the first tuning circuit (23) is used to adjust the electrical length of the first parasitic antenna (21).

12. The electronic device according to any one of claims 1 to 10, characterized in that: The first feeding antenna (11) is a low frequency band antenna, and the low frequency band is a frequency band from 600 MHz to 960 MHz.

13. The electronic device (100) according to any one of claims 1 to 10, characterized in that: The electronic device (100) further comprises a rotating part (50), wherein the rotating part (50) connects the first part (10) and the second part (20), and the rotating part (50) can be deformed so that the first part (10) and the second part (20) can be relatively rotated to be folded or unfolded, and the rotating part (50) is located in a central area of ​​the electronic device (100); when the first part (10) and the second part (20) are in an open state, the first feeding antenna (11), the second feeding antenna (31) and the first parasitic antenna (21) are respectively located in different vertex areas of the electronic device (100).

14. The electronic device (100) according to any one of claims 1 to 10, characterized in that: The electronic device (100) further comprises a rotating part (50), wherein the rotating part (50) connects the first part (10) and the second part (20), and the rotating part (50) can be deformed so that the first part (10) and the second part (20) can rotate relative to each other to be folded or unfolded, and the rotating part (50) deviates from the central area of ​​the electronic device (100); when the first part (10) and the second part (20) are in an open state, the electronic device (100) comprises two side edges spanning the rotating part (50), the first feeding antenna (11) and the first parasitic antenna (21) are located on the same side edge, and the second feeding antenna (31) and the first feeding antenna (11) are located on different sides.

15. The electronic device (100) according to any one of claims 1 to 10, characterized in that: The first part (10) is slidably connected to the second part (20); when the first part (10) and the second part (20) are in a closed state, the first feeding antenna (11) and the second feeding antenna (31) are respectively located at two diagonally arranged vertex areas of the electronic device (100).

16. The electronic device (100) according to any one of claims 1 to 10, characterized in that: The first feeding antenna (11) and the first parasitic antenna (21) are part of the frame of the electronic device (100), or are fixed to the inner side of the frame of the electronic device (100).

17. The electronic device (100) according to any one of claims 1 to 10, characterized in that: The electronic device (100) further comprises a sensing device (30), wherein the sensing device (30) is located at the first part (10) and / or the second part (20), and the sensing device (30) is used to sense whether the first part (10) and the second part (20) are in a closed state or an open state.

18. An electronic device (100), characterized in that: The invention comprises a first part (10) and a second part (20), wherein the first part (10) and the second part (20) can be folded relative to each other to a closed state, and can also be unfolded relative to each other to an open state; when the first part (10) and the second part (20) are in the closed state, a frame (101) of the first part (10) and a frame (201) of the second part (20) partially overlap or completely overlap; The first part (10) comprises a first feeding antenna (11), a first feeding circuit (12) and a first grounding circuit (13), wherein the first feeding circuit (12) is connected to the first feeding antenna (11) and is used to feed the first feeding antenna (11), and the first grounding circuit (13) is connected to the first feeding antenna (11) and is used to ground the first feeding antenna (11); The second part (20) comprises a first parasitic antenna (21), the first parasitic antenna comprising a second metal segment with two open ends, in the closed state, the first parasitic antenna (21) is a 1 / 2 wavelength antenna and is used to couple with the first feeding antenna (11) to generate a first resonance, the first resonance being used to broaden the bandwidth of the first feeding antenna (11), The second part (20) further comprises a second feeding antenna (31), the second feeding antenna (31) being electrically isolated from the first parasitic antenna (21), and in the open state, the first parasitic antenna (21) being used to couple with the second feeding antenna (31) to generate a second resonance, and the second resonance being used to broaden the bandwidth of the second feeding antenna (31).

19. The electronic device according to claim 18, characterized in that: The first feeding antenna comprises a first metal segment having an open end at one end and a grounded end at the other end. In the closed state, the first feeding antenna is a 1 / 4 wavelength antenna.

20. The electronic device according to claim 18, characterized in that In the closed state, the current of the first parasitic antenna flows from one end to the other end of the first parasitic antenna.

21. The electronic device according to claim 18, characterized in that: In the open state, the first feeding antenna is a 1 / 4 wavelength antenna.

22. The electronic device according to claim 21, characterized in that: In the closed state, the current of the first feeding antenna flows from the ground end to the open end.

23. The electronic device according to claim 18, characterized in that: In the closed state, the first feeding antenna (11) and the first parasitic antenna (21) at least partially overlap and have one ends aligned.

24. The electronic device (100) according to any one of claims 18 to 23, characterized in that: The second part (20) further comprises one or more first tuning circuits (23), wherein the one or more first tuning circuits (23) are connected to the first parasitic antenna (21), and the first tuning circuit (23) is used to adjust the electrical length of the first parasitic antenna (21).

25. The electronic device according to any one of claims 18 to 23, characterized in that: The first feeding antenna (11) is a low frequency band antenna, and the low frequency band is a frequency band from 600 MHz to 960 MHz.

Images