Electronic device

Abstract

The embodiments of this specification disclose an electronic device comprising a first part and a second part. The first part and the second part can be folded relative to each other in a closed state and can be extended relative to each other in 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 overlap partially or wholly. The first part includes a first feed antenna, a first feed circuit, and a first ground circuit, wherein the first feed circuit is connected to the first feed antenna and configured to feed the first feed antenna, and the first ground circuit includes the first feed antenna and is configured to allow the first feed antenna to be grounded. 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 is coupled to the first feed antenna to generate a first excited resonant signal through excitation. This electronic device has relatively high antenna performance in a closed state.

Description

Technology Field

[0001] The embodiments of this specification relate to the field of wireless communication technology, particularly electronic devices. Background Technology

[0002] With the technological advancement of components such as flexible displays, the identity (ID) form of electronic devices (e.g., mobile phones) is trending from bar phones to foldable phones. When open, foldable phones have a large screen area, fully satisfying the consumer's visual experience. When closed, foldable phones are significantly compact, making them easy to carry. However, when a foldable phone is closed, the antenna performance of the low-band antennas in the existing antenna architecture is significantly lower compared to the antenna performance in the open state, and the antenna performance is also poor.

[0003] The embodiments of this specification provide an electronic device. The electronic device has relatively high antenna performance in a closed state.

[0004] One embodiment of the present specification provides an electronic device comprising a first part and a second part. The first part and the second part can be folded relative to each other in a closed state and can be extended relative to each other in 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 overlap partially or wholly.

[0005] The first part includes a first feed antenna, a first feed circuit, and a first ground circuit. The first feed circuit is connected to the first feed antenna and configured to feed the first feed antenna. The first ground circuit is connected to the first feed antenna and configured to allow the first feed antenna to be grounded.

[0006] The second part includes a first parasitic antenna. When the first and second parts are closed, the first parasitic antenna is not grounded and is coupled to the first feed antenna to generate a first excited resonant signal through excitation.

[0007] In this embodiment, when the first and second parts are in a closed state, the first parasitic antenna and the first feed antenna are positioned at least partially opposite each other to create a coupling capacitor between the first parasitic antenna and the first feed antenna, thereby allowing a first excited resonant signal to be generated through coupling. When the first feed antenna is operated, radio frequency energy from the first feed antenna is transferred to the first parasitic antenna through coupling, thereby creating an additional resonant mode through excitation on the first parasitic antenna, expanding the radiation frequency bandwidth of the antenna, reducing the adverse effects on antenna performance caused by frame overlap and the reduction of the ground plane length in the closed state, and improving the antenna performance of the electronic device; that is, the electronic device can have relatively high antenna performance in the closed state. When the first parasitic antenna is not grounded, the electrical length is 1 / 2 wavelength, i.e., the first parasitic antenna is a 1 / 2 wavelength antenna. In this case, since the reduction in the length of the ground plane during folding has a relatively weak effect on the performance of the first parasitic antenna, the first parasitic antenna can maintain good radiation performance when the first and second parts are closed, thereby effectively expanding the radiation frequency bandwidth of the first feed antenna.

[0008] Optionally, a matching circuit may be further disposed between the first feed circuit and the first feed antenna, and the matching circuit is configured 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, or a capacitor used as a lumped element. For example, the matching circuit may include at least one of a microstrip and a strip used as a distribution element.

[0009] In an optional embodiment, the second part further includes a second feed antenna. The second feed antenna is electrically isolated from the first parasitic antenna. When the first and second parts are open, the first parasitic antenna can be coupled to the second feed antenna to generate a second excited resonant signal through excitation.

[0010] In this embodiment, when the first and second parts are in an open state, the first parasitic antenna can be coupled to the second feed antenna, and a coupling capacitor is created between the first parasitic antenna and the second feed antenna, so that a resonant signal excited twice can be generated through coupling and excitation. When the second feed antenna is operated, radio frequency energy of the second feed antenna is transferred to the first parasitic antenna through coupling, and an additional resonant mode is generated through the excitation of the first parasitic antenna, thereby expanding the radiation frequency bandwidth of the antenna and improving the antenna performance of the electronic device. Since the first parasitic antenna can be coupled to the first feed antenna when the first and second parts are in a closed state and can be coupled to the second feed antenna when the first and second parts are in an open state, the electronic device can multiplex the first parasitic antenna, thereby improving antenna utilization.

[0011] Optionally, when the first and second parts are in an open state, the first feed antenna, the second feed antenna, and the first parasitic antenna are located in different corner regions of the electronic device. In this case, the first feed antenna and the second feed antenna can operate in a close frequency band, and the first feed antenna and the second feed antenna have a relatively wide space and a relatively low degree of mutual interference. The first parasitic antenna can also be better coupled individually to the first feed antenna and the second feed antenna in the two states.

[0012] In an optional embodiment, the second part further includes a second feed circuit and a second ground circuit. The second ground circuit is connected to one end of the second feed antenna and is configured so that the second feed antenna can be grounded. The other end of the second feed antenna is an open end that is not grounded. The second feed circuit is connected to the second feed antenna, and the connection point of the second feed circuit on the second feed antenna is located between the open end and the connection point of the second ground circuit on the second feed antenna. In this case, the second feed antenna is a quarter-wave antenna. When the first part and the second part are open, the first parasitic antenna is grounded. In this case, the electrical length of the first parasitic antenna is a quarter-wave, i.e., the first parasitic antenna is a quarter-wave antenna. Since the electrical length of the first parasitic antenna is adjustable, there may be different electrical lengths in different usage environments.

[0013] In this implementation, the coupling effect between the first parasitic antenna and the second feed antenna is excellent, and the bandwidth of the second feed antenna can be expanded relatively significantly. For example, to improve the coupling effect, the end of the second feed antenna moving away from the first parasitic antenna is set as the ground end, and the end of the second feed antenna close to the first parasitic antenna is set as the open end.

[0014] Optionally, a matching circuit may be further disposed between the second feed circuit and the second feed antenna, and the matching circuit is configured 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, or a capacitor used as a lump element. For example, the matching circuit may include at least one of a microstrip and a strip used as a distribution element.

[0015] 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 configured to disconnect the first parasitic antenna from ground when the first and second parts are in a closed state. In this case, the electrical length of the first parasitic antenna is 1 / 2 wavelength. The switching circuit is further configured to connect the first parasitic antenna to ground when the first and second parts are in an open state. In this case, the electrical length of the first parasitic antenna is 1 / 4 wavelength.

[0016] In this embodiment, by arranging a switching circuit, the electrical length of the first parasitic antenna is adjustable, and the first parasitic antenna can implement different coupling functions when the electronic device is in a different usage state, so that the antenna is multiplexed.

[0017] For example, the switching circuit may include a tuning switch. The switching circuit can adjust the electrical length of the first parasitic antenna by switching the connection relationship between the first parasitic antenna and ground by switching the tuning switch between a closed state and an open state. For example, the tuning switch may be connected to approximately the middle portion of the first parasitic antenna. In this specification, the middle portion of the antenna includes a center position and another position slightly offset from the center position, and the middle portion of the antenna is located between the two ends of the antenna. The middle portion of the first parasitic antenna is located between the two ends of the first parasitic antenna.

[0018] As another example, the switching circuit may include a tuning switch, a first matching branch, and a second matching branch. The first matching branch is different from the second matching branch. The control terminal of the tuning switch is connected to the first parasitic antenna, and the two selection terminals of the tuning switch are connected to the first matching branch and the second matching branch. The switching circuit can adjust the electrical length of the first parasitic antenna by switching the connection between the first matching branch and the second matching branch using the control terminal of the tuning switch, thereby switching the connection relationship between the first parasitic antenna and ground.

[0019] Optionally, the first part further includes a second parasitic antenna. When the first and second parts are closed, the second parasitic antenna is not grounded and is coupled to the second feed antenna to generate a third excited resonant signal through excitation. In this case, the second parasitic antenna is a half-wave antenna. When the first and second parts are open, the second parasitic antenna may be located at the upper left of the electronic device. The second parasitic antenna, the first feed antenna, the second feed antenna, and the first parasitic antenna are located at different corner regions of the electronic device. When the first and second parts are open, the second parasitic antenna is coupled to the first feed antenna to generate a fourth excited resonant signal through excitation. In this case, the second parasitic antenna may be grounded.

[0020] Optionally, the physical length of the metal segment on which the switching circuit and the first parasitic antenna are located can be designed so that the first parasitic antenna switches between a grounded state and an ungrounded state, that is, the electrical length of the first parasitic antenna can be designed to switch between 1 / 2 wavelength and 1 / 4 wavelength.

[0021] In an optional embodiment, the second part further includes one or more first tuning circuits. One or more first tuning circuits are connected to a first parasitic antenna. The first tuning circuits are configured to adjust the electrical length of the first parasitic antenna. In this embodiment, one or more tuning circuits are connected to the first parasitic antenna, so that the electrical length of the first parasitic antenna meets the adjustment requirements through the adjustment of one or more tuning circuits.

[0022] One or more first tuning circuits are connected to one end of the first parasitic antenna to better perform the tuning function. For example, the second part includes two first tuning circuits, and the two first tuning circuits are individually connected to both ends of the first parasitic antenna. The first tuning circuits may include one or more of a switch, a capacitor, an inductor, or a low-pass high-pass filter.

[0023] In an optional embodiment, the second part further comprises a second feed antenna, a second feed circuit, and a second ground circuit. The second feed antenna is electrically isolated from the first parasitic antenna. The second ground circuit is connected to the middle portion of the second feed antenna. Both ends of the second feed antenna are open ends that are not grounded. The second feed circuit is connected to the second feed antenna, and the connection location of the second feed circuit on the second feed antenna is located between one end on the second feed antenna and the connection location of the second ground circuit of the second feed antenna. In this case, the second feed antenna is a half-wave antenna. The first parasitic antenna is a floating antenna; that is, the first parasitic antenna is not grounded.

[0024] In this embodiment, when the first and second parts are in an open state, the second feed antenna has two antenna modes, a relatively large bandwidth, and relatively high antenna performance. Therefore, the second feed antenna may not be connected to the first parasitic antenna. When the first and second parts are in a closed state, the first feed antenna is coupled to the first parasitic antenna of 1 / 2 wavelength to improve the antenna performance of the first feed antenna and reduce adverse effects from the external environment. In this case, in the antenna architecture, there is no need to switch between different antenna coupling types when the first and second parts are in different states; that is, the first parasitic antenna can be a single 1 / 2 wavelength antenna, and since there is no need to place a switching circuit, the structure of the antenna architecture is simpler.

[0025] Optionally, the electronic device further comprises a fifth feed antenna, a fifth feed circuit, a fifth ground circuit, and a third parasitic antenna. The fifth feed antenna may be located in the second part, and the third parasitic antenna may be located in the first part (in another embodiment, the fifth feed antenna may be located in the first part, and the third parasitic antenna may be located in the second part). The fifth feed antenna is electrically isolated from the first parasitic antenna and the second feed antenna. The fifth feed circuit is connected to the fifth feed antenna and configured to feed the fifth feed antenna. The fifth ground circuit is connected to the fifth feed antenna and configured to allow the fifth feed antenna to be grounded. When the first and second parts are closed, the third parasitic antenna is not grounded and is coupled to the fifth feed antenna to generate a fifth excited resonant signal through excitation. In this case, the electrical length of the third parasitic antenna is half a wavelength, i.e., the third parasitic antenna is a half-wavelength antenna. In this implementation, the fifth feed antenna can be configured to radiate medium and high frequency signals.

[0026] In an optional embodiment, the electronic device further includes a rotating part. The rotating part connects the first part and the second part. The rotating part can be deformed so that it can rotate to fold or extend the first part and the second part relative to each other. The rotating part is located in the central region of the electronic device. Being located in the central region of the electronic device means that the centerline of the rotating part approximately coincides with the centerline of the electronic device (a slight deviation is permitted). When the first part and the second part are in a closed state, the first part and the second part overlap, and the frame of the first part and the frame of the second part overlap entirely. In this case, the frame of the first part and the frame of the second part are positioned completely opposite each other.

[0027] When the first and second parts are open, the first feed antenna, the second feed antenna, and the first parasitic antenna are located in different corner regions of the electronic device. In this case, the first feed antenna and the second feed antenna can operate in a close frequency band, and the first feed antenna and the second feed antenna have a relatively wide space and a relatively low degree of mutual interference. The first parasitic antenna can also be better coupled individually to the first feed antenna and the second feed antenna in the two states.

[0028] In an optional embodiment, the electronic device further includes a rotating part. The rotating part connects the first part and the second part. The rotating part may be deformable so that it can rotate to fold or extend the first part and the second part relative to each other. The rotating part is located away from the central region of the electronic device. In this case, the deviation between the centerline of the rotating part and the centerline of the electronic device is relatively large. When the first part and the second part are in a closed state, one end of one of the first part and the second part protrudes relative to the other part.

[0029] When the first and second parts are open, the electronic device includes two side edges extending across the rotating part, the first feed antenna and the first parasitic antenna are located on the same side edge, and the second feed antenna and the first feed antenna are located on different side edges. In this case, when the first and second parts are closed, the first feed antenna and the first parasitic antenna can be coupled to each other. The second feed antenna and the first feed antenna are located on different side edges. In this case, both the first feed antenna and the second feed antenna have relatively large radiation spaces.

[0030] The first parasitic antenna may extend along the edge of the corner region from one side edge of the electronic device to another edge of the electronic device. The second parasitic antenna may extend along the other corner region from another side edge of the electronic device to another edge of the electronic device.

[0031] In an optional embodiment, the first part is slidably connected to the second part. When sliding relative to each other, the first part and the second part may be folded relative to each other in a closed state and may be extended relative to each other in an open state. When the first part and the second part are in a closed state, the first part and the second part are stacked vertically. When the first part and the second part are in an open state, a small portion of the first part (10) and a small portion of the second part remain stacked, and most of the first part and most of the second part are in a twisted state, i.e., an extended state. In one embodiment, when the first part and the second part are in an open state, the first part and the second part may be completely offset from each other.

[0032] When the first and second parts are closed, the first feed antenna and the second feed antenna are separately located in two corner areas positioned diagonally across the electronic device. In this case, both the first feed antenna and the second feed antenna have relatively sufficient radiation space.

[0033] In an optional embodiment, the first feed antenna and the first parasitic antenna are part of the frame of the electronic device. The frame of the electronic device includes a first part frame and a second part frame. For example, the first part frame includes at least two metal segments and at least one insulating segment for electrically insulating the at least two metal segments. The first feed antenna may be formed on one of the metal segments. The second part frame includes at least two metal segments and at least one insulating segment for electrically insulating the at least two metal segments. The first parasitic antenna may be formed on one of the metal segments.

[0034] Alternatively, the first feed antenna and the first parasitic antenna may be attached to the inside of the frame of the electronic device. For example, the first feed antenna is fixed to the inside of the frame of the first part. The first parasitic antenna is fixed to the inside of the frame of the second part. In this case, the structural form of the first feed antenna may be a flexible circuit board, a laser direct structuring (LDS) metal, an insert molding metal, or a wire of a printed circuit board.

[0035] Optionally, the first part further includes a second parasitic antenna. When the first and second parts are closed, the second parasitic antenna is not grounded and is coupled to the second feed antenna to generate a third excited resonant signal through excitation. In this case, the second parasitic antenna is a half-wave antenna. When the first and second parts are open, the second parasitic antenna may be located at the upper left of the electronic device. The second parasitic antenna, the first feed antenna, the second feed antenna, and the first parasitic antenna are located at different corner regions of the electronic device. When the first and second parts are open, the second parasitic antenna is coupled to the first feed antenna to generate a fourth excited resonant signal through excitation. In this case, the second parasitic antenna may be grounded.

[0036] In an optional embodiment, the second part further comprises a third feed circuit and a first filter circuit. The third feed circuit and the first filter circuit are connected to different locations on the first parasitic antenna and are configured to form a third feed antenna on the first parasitic antenna. The radiation frequency band of the third feed antenna is different from the radiation frequency band of the first feed antenna. For example, the first feed antenna is a low-band antenna. The radiation frequency band of the third feed antenna is a wireless local area network antenna, a local area wireless communication antenna, a mid-band and high-band antenna, a sub-6G antenna (frequency less than 6 GHz), a wireless charging antenna, etc. In this case, the first filter circuit has low-pass and high-pass functions. For example, the first filter circuit includes a high-pass low-pass filter.

[0037] In this case, the third feed antenna and the first parasitic antenna share the same radiator segment, thereby increasing antenna utilization. Additionally, since the radiation frequency band of the third feed antenna is different from that of the first feed antenna, the third feed antenna and the first feed antenna are well isolated without interfering with each other.

[0038] In an optional embodiment, the electronic device further comprises a fourth feed antenna, a fourth feed circuit, and a second filter circuit. The fourth feed antenna is adjacent to and electrically isolated from the first parasitic antenna. 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-band antenna. The radiation frequency band of the fourth feed antenna is a wireless local area network antenna, a local area wireless communication antenna, a mid-band and high-band antenna, a wireless charging antenna, etc. In this case, the second filter circuit has a low-pass and high-pass function. For example, the second filter circuit includes a high-pass low-pass filter.

[0039] In this case, antenna utilization can be increased by implementing multiplexing using the radiator portion where the first parasitic antenna is located as a parasitic branch of the fourth feed antenna. Additionally, since the radiation frequency band of the fourth feed antenna is different from that of the first feed antenna, the fourth feed antenna and the first feed antenna are well isolated without interfering with each other.

[0040] The fourth feed antenna may be located in the first or second part. The connection position of the fourth feed antenna on the first parasitic antenna is located between the connection position of the fourth feed antenna and the switching circuit on the first parasitic antenna.

[0041] 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 configured to detect whether the first part and the second part are in a closed or open state. The sensing device is electrically connected to the 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 the sensing signal from the sensing device and transmits a corresponding control signal to other components of the electronic device according to the signal, so that other components of the electronic device can be adjusted in a timely manner to a corresponding operating mode depending on whether the first part and the second part are in a closed or open state. In this way, the electronic device has higher reliability and a better user experience. The sensing device may include one or more of a gyroscope sensor, a Hall effect sensor, or a proximity light sensor.

[0042] Optionally, the electronic device further includes a display. The display is configured to display images, videos, etc. In this embodiment, the display is a flexible display. Since the display can be positioned continuously on the same surface of the first part, the rotating part, and the second part, the electronic device has a continuous large-area display to implement a large-screen display when the first part and the second part are in an open state, and when the first part and the second part are in a closed state, the electronic device can implement displays on the front, rear, and sides of the electronic device.

[0043] Optionally, the electronic device further includes a ground plane. The ground plane is grounded and extends from the first part to the second part. In one embodiment, the ground plane is the circuit board of the electronic device. For example, the ground plane may be a flexible circuit board, or the ground plane may be a flexible-rigid circuit board. In another embodiment, the ground plane may be integrated into another component of the electronic device, for example, a display. Brief explanation of the drawing

[0044] FIG. 1 is a schematic structural diagram of an electronic device of a first embodiment according to an embodiment of the present specification. Figure 2 is a schematic diagram of the structure of the electronic device shown in Figure 1 in a different usage state. Figure 3 is a schematic diagram of the structure of the electronic device shown in Figure 2 from a different angle. Figure 4 is a reflection coefficient diagram of an exemplary structure of the electronic device shown in Figure 1. Figure 5 is an efficiency diagram of an exemplary structure of the electronic device shown in Figure 1. Figure 6 is a schematic diagram of the antenna architecture of the electronic device shown in Figure 1 in one implementation. Figure 7 is a schematic diagram of the antenna architecture shown in Figure 6 when the electronic device is in a different usage state. Figure 8 is a reflection coefficient diagram of an exemplary structure of the antenna architecture shown in Figure 6. Figure 9 is an efficiency diagram of an exemplary structure of the antenna architecture shown in Figure 6. Figure 10 is a simulation of the current and electric field in an exemplary structure of the antenna architecture shown in Figure 6. Figure 11 is a reflection coefficient diagram of another exemplary structure of the antenna architecture shown in Figure 6. Figure 12 is an efficiency diagram of another exemplary structure of the antenna architecture shown in Figure 6. FIG. 13 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. FIG. 14 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. FIG. 15 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. FIG. 16 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. FIG. 17 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. FIG. 18 is a schematic diagram of the antenna architecture shown in FIG. 17 in a different usage state. FIG. 19 is a reflection coefficient diagram of a second feed antenna in an exemplary structure of the antenna architecture shown in FIG. 17. FIG. 20 is an efficiency diagram of a second feed antenna in an exemplary structure of the antenna architecture shown in FIG. 17. FIG. 21 illustrates a simulation of the current, electric field, and radiation direction of a second feed antenna in an exemplary structure of the antenna architecture shown in FIG. 17. FIG. 22 is a reflection coefficient diagram of an exemplary structure of the antenna architecture shown in FIG. 17. FIG. 23 is an efficiency diagram of an exemplary structure of the antenna architecture illustrated in FIG. 17. FIG. 24 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. FIG. 25 is a schematic structural diagram of an electronic device of a second embodiment according to an embodiment of the present specification. FIG. 26 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 25. FIG. 27 is a schematic structural diagram of an electronic device of a third embodiment according to an embodiment of the present specification. FIG. 28 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 27 in one implementation. FIG. 29 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 27 in a different implementation. FIG. 30 is a schematic structural diagram of an electronic device of the fourth embodiment according to an embodiment of the present specification. FIG. 31 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 30. FIG. 32 is a schematic diagram of the antenna architecture shown in FIG. 31 in a different usage state. Specific details for implementing the invention

[0045] The following describes an embodiment of the present invention with reference to the attached drawings.

[0046] The embodiments of this specification provide an electronic device. The electronic device may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a wearable device, etc.

[0047] The electronic device includes a plurality of antennas. In this specification, "plural" means at least two. The antennas are configured to transmit and receive electromagnetic signals. Each antenna of the electronic device may be configured to cover one or more communication frequency bands. Different antennas may be multiplexed to improve antenna utilization. The antennas may be dipole antennas, monopole antennas, inverted F-shaped antennas (IFA), patch antennas, etc.

[0048] Electronic devices can communicate with a network or other devices using multiple antennas through wireless communication technology. Wireless communication technology includes the 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 network (WLAN) (e.g., wireless fidelity (Wi-Fi) network), near field communication (NFC) technology, frequency modulation (FM), infrared (IR) technology, etc. In this specification, "A and / or B" includes three cases: "A", "B", and "A and B".

[0049] FIG. 1 is a schematic structural diagram of an electronic device of a first embodiment according to an embodiment of the present specification, FIG. 2 is a schematic structural diagram of the electronic device shown in FIG. 1 in a different state of use, and FIG. 3 is a schematic structural diagram of the electronic device shown in FIG. 1 from a different angle. The electronic device shown in FIG. 1 is described using a mobile phone as an example.

[0050] 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) may be folded relative to each other in a closed state and extended relative to each other in an open state. That is, the first part (10) and the second part (20) may be switched between a closed state and an open state. FIG. 1 corresponds to the electronic device (100) in an open state. FIG. 2 and FIG. 3 correspond to the electronic device (100) in a closed state.

[0051] 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 configured to detect whether 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 a sensing signal from the sensing device (30) and, based on the signal, transmits a control signal corresponding to another component of the electronic device (100) so that the other component of the electronic device (100) can be adjusted in a timely manner to a corresponding operating mode depending on whether the first part (10) and the second part (20) are in a closed state or an open state. In this way, the electronic device (100) has higher reliability and a better user experience. The sensing device (30) may include one or more of a gyroscope sensor, a Hall effect sensor, or a proximity light sensor.

[0052] Optionally, there are multiple connection relationships between the first part (10) and the second part (20), such as a rotary connection, a sliding connection, and a detachable snap-fit ​​connection. In this embodiment, the first part (10) is rotatably connected to the second part (20) as an example. For example, the electronic device (100) may further include a rotary part (50). The rotary part (50) connects the first part (10) and the second part (20). The rotary part (50) may be deformed to rotate relative to each other so that the first part (10) and the second part (20) can be folded or extended. As illustrated in FIG. 1, when the first part (10) and the second part (20) are rotated relative to each other and extended to an open state, the rotary part (50) is located between the first part (10) and the second part (20), and the rotary part (50) is located in the central region of the electronic device (100). The fact that the rotating part (50) is located in the central region of the electronic device (100) means that the centerline of the rotating part (50) roughly coincides with the centerline of the electronic device (100) (a slight deviation is allowed). The rotating part (50) extends in the first direction (X), and the first part (10) and the second part (20) rotate relative to each other in the first direction (X). In this case, as shown in FIGS. 2 and 3, when the first part (10) and the second part (20) are in a closed state, the first part (10) and the second part (20) overlap, and the frame (101) of the first part (10) and the frame (201) of the second part (20) completely overlap. In this case, the frame (101) of the first part (10) and the frame (201) of the second part (20) are completely opposite each other. The frame of the electronic device (100) includes a frame (101) of the first part (10) and a frame (201) of the second part (20). Most of the components of the electronic device (100) are located inside the frame of the electronic device (100). In another embodiment, the rotating part (50) may be located away from the central region of the electronic device (100). This embodiment will be described later.

[0053] Optionally, the electronic device (100) further includes a display (60). The display (60) is configured to display images, videos, etc. In this embodiment, the display (60) uses a flexible display, for example, an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MILL) display, a micro organic light-emitting diode (MILL) display, a micro organic light-emitting diode (MILL) display, or a quantum dot light-emitting diode (QLED) display. In this case, since the display (60) can be positioned continuously on the same surface of the first part (10), the rotating part (50), and the second part (20), when the first part (10) and the second part (20) are open, the electronic device (100) can have a continuous large-area display to implement a large-screen display, and when the first part (10) and the second part (20) are closed, the electronic device (100) can implement displays on the front, rear, and sides of the electronic device (100).

[0054] In another embodiment, the display (60) may alternatively use a rigid display, for example, a liquid crystal display (LCD). In this case, the display (60) may include two display portions, and the two display portions are located separately in the first portion (10) and the second portion (20).

[0055] 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 flip methods. For example, as illustrated by the solid arrow in FIG. 4, in one flip method, when the first part (10) and the second part (20) are folded, a part of the display (60) located in the first part (10) and a part of the display (60) located in the second part (20) come into face-to-face contact with each other, and when the first part (10) and the second part (20) are closed, the display (60) is located inside the first part (10) and the second part (20). This flip method is also referred to as the inward folding of the display (60). In another flip method, as illustrated by the dotted arrow in FIG. 1, when the first part (10) and the second part (20) are folded, the part of the display (60) located in the first part (10) and the part of the display (60) located in the second part (20) are moved away from each other, and when the first part (10) and the second part (20) are closed, the display (60) is located outside the first part (10) and the second part (20). This flip method is also referred to as the outward folding of the display (60).

[0056] Optionally, the first part (10) includes a first feed antenna (11). The first feed antenna (11) may have a plurality of structural forms. For example, the first feed antenna (11) is part of the frame (101) of the first part (10) of the electronic device (100) or is fastened inside the frame (101) of the first part (10). In this embodiment, the case where the first feed antenna (11) is part of the frame (101) of the first part (10) is described as an example. The frame (101) of the first part (10) includes at least two metal segments and at least one insulating segment for electrically insulating the at least two metal segments. The first feed antenna (11) may be formed on one of the metal segments. In another embodiment, the first feed antenna (11) is fixed inside the frame (101) of the first part (10). In this case, the structural form of the first feed antenna (11) may be a flexible circuit board, laser direct structuring (LDS) metal, insert molding metal, or a wire of a printed circuit board.

[0057] Referring to FIG. 1, the electronic device (100) further comprises a ground plane (70). The ground plane (70) is grounded and extends from a first part (10) to a second part (20). In one embodiment, the ground plane (70) is a circuit board of the electronic device (100). For example, the ground plane (70) may be a flexible circuit board, or the ground plane (70) may be a flexible-rigid circuit board. In another embodiment, the ground plane (70) may be integrated into another component of the electronic device (100), for example, a display (60).

[0058] In this embodiment, the first feed antenna (11) is a grounded quarter-wave antenna. The first feed antenna (11) may be a low-band antenna (600 MHz to 960 MHz), for example, LTE B28 (703 MHz to 803 MHz) or LTE B30 (791 MHz to 862 MHz). When the first part (10) and the second part (20) are open, the first feed antenna (11) can achieve relatively high performance by radiating using a relatively long ground plane (70).

[0059] Referring to FIGS. 1 to 3, in this embodiment, after the first part (10) and the second part (20) are switched from an open state to a folded state, the length of the second direction (perpendicular to the first direction X) of the ground plane (70) is reduced by approximately half, the frame (101) of the first part (10) and the frame (201) of the second part (20) overlap, the space of the first feed antenna (11) is affected, and the low-frequency performance is significantly degraded compared to the open state.

[0060] For example, FIG. 4 is a reflection coefficient curve of an exemplary structure of the electronic device shown in FIG. 1, and FIG. 5 is an efficiency curve of an exemplary structure of the electronic device shown in FIG. 1. FIG. 4 and FIG. 5 show the comparison results of the first feed antenna (11) in two frequency bands: low-band LTE B20 (791 MHz to 862 MHz) and LTE B8 (880 MHz to 960 MHz). In FIG. 4 and FIG. 5, the solid line represents the performance of the first feed antenna (11) when the first part (10) and the second part (20) are open, and the dotted line represents the performance of the first feed antenna (11) when the first part (10) and the second part (20) are closed. In FIG. 4, the horizontal coordinate represents the frequency (in GHz) and the vertical coordinate represents the reflection coefficient (in dB). In FIG. 5, the horizontal coordinate represents the frequency (in GHz) and the vertical coordinate represents the efficiency (in dB).

[0061] In the exemplary structure corresponding to FIGS. 4 and 5, the first feed antenna (11) is a frame antenna in the form of an inverted F-shaped antenna. The first feed antenna (11) is located at the upper right corner of the first part (10) separated from the second part (20) (located at the upper right corner of the electronic device (100) when the first part (10) and the second part (20) are open). The frame thickness and width of the electronic device (100) are approximately 4 mm and 3 mm, respectively. The width of the clearance area between the frame of the electronic device (100) and the ground plane (70) is approximately 1 mm. The gap width between two adjacent metal segments in the frame of the electronic device (100) is approximately 1.5 millimeters. The dielectric constant and loss angle of the insulating material used as the insulating segment between two adjacent metal segments and the insulating material filling the gap area between the frame of the electronic device (100) and the ground plane (70) are 3.0 and 0.01, respectively. The rotating part (50) of the first part (10) and the second part (20) is located in the central region of the electronic device (100). When the first part (10) and the second part (20) are closed, the distance 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.

[0062] As can be seen from FIGS. 4 and 5, in the high frequency band portion (around 900 MHz) of the low frequency band, the low frequency performance of the first feed antenna (11) in the closed and open states of the first part (10) and the second part (20) is similar. However, in the low frequency band portion (700 MHz to 800 MHz) of the low frequency band, the low frequency performance of the first feed antenna (11) in the closed state of the first part (10) and the second part (20) is much lower than the frequency performance of the first feed antenna (11) in the open state of the first part (10) and the second part (20).

[0063] In addition, in addition to the low frequency band, if the first feed antenna (11) is a mid-to-high frequency antenna (1700MHz to 2700MHz, e.g., GPS, Wi-Fi, LTE B3, B1, B7), when the first part (10) and the second part (2) are in a closed state, the performance of the first feed antenna (11) is reduced to different degrees due to the impact of the frame (101) of the first part (10) and the frame (201) of the second part (20) overlapping and the change in the length of the ground plane (70).

[0064] FIG. 6 is a schematic diagram of the antenna architecture of the electronic device illustrated in FIG. 1 in one embodiment, and FIG. 7 is a schematic diagram of the antenna architecture illustrated in FIG. 6 when the electronic device is in a different usage state. FIG. 6 corresponds to the structure when the first part (10) and the second part (20) are in an open state, and FIG. 7 corresponds to the structure when the first part (10) and the second part (20) are in a closed state. The antenna located above the dotted line in FIG. 6 is located in the first part (10), and the antenna located below the dotted line is located in the second part (20). In FIG. 7, since the antennas of 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 depicted staggered so that the antenna of the first part (10) can be located outside the antenna located in the second part (20).

[0065] The first part (10) includes a first feed antenna (11), a first feed circuit (12), and a first ground circuit (13). The first feed circuit (12) is connected to the first feed antenna (11) and configured to feed the first feed antenna (11). The first ground circuit (13) is connected to the first feed antenna (11) and configured to allow the first feed antenna (11) to be grounded. For example, as shown in FIG. 6, the first ground circuit (13) is connected to one end of the first feed antenna (11) and configured to ground the first feed antenna (11). The one end of the first feed antenna (11) connected to the first ground circuit (13) is the ground end. The other end of the first feed antenna (11) is an open end that is not grounded. The connection position of the first feed circuit (12) on the first feed antenna (11) is located between the open end of the first feed antenna (11) and the connection position of the first ground circuit (13) on the first feed antenna (11). In this case, the electrical length of the first feed antenna (11) is 1 / 4 wavelength, that is, the first feed antenna (11) is a 1 / 4 wavelength antenna.

[0066] The second part (20) includes a first parasitic antenna (21). When the first part (10) and the second part (20) are closed, the first parasitic antenna (21) is not grounded and is coupled to the first feed antenna (11) to generate a first excited resonant signal through excitation. In this case, the electrical length of the first parasitic antenna (21) is half a wavelength, i.e., the first parasitic antenna (21) is a half wavelength antenna. There may be one or more first excited resonant signals.

[0067] In this implementation, when the first part (10) and the second part (20) are in a closed state, the first parasitic antenna (21) and the first feed antenna (11) are positioned at least partially opposite each other to create a coupling capacitor between the first parasitic antenna and the first feed antenna (11), thereby generating a first excited resonant signal through coupling and excitation. When the first feed antenna (11) is operated, radio frequency energy of the first feed antenna (11) is transferred to the first parasitic antenna (21) through coupling, and an additional resonant mode is generated through the excitation of the first parasitic antenna (21), the radiation frequency bandwidth of the antenna is extended, the adverse effects on antenna performance due to the reduction in the length of the ground plane (70) and frame overlap in the closed state are reduced, and the antenna performance of the electronic device (100) is improved, that is, the electronic device (100) exhibits relatively high antenna performance in the closed state.

[0068] When the first parasitic antenna (21) is not grounded, the electrical length of the first parasitic antenna (21) is half a wavelength, and since the reduction in the length of the ground plane (70) when folding has a relatively weak effect on the performance of the first parasitic antenna (21), the first parasitic antenna (21) can maintain good radiation performance when the first part (10) and the second part (20) are closed, and accordingly, the radiation frequency bandwidth of the first feed antenna (11) can be effectively expanded.

[0069] For example, FIG. 8 is a reflection coefficient curve of an exemplary structure of the antenna architecture shown in FIG. 6, FIG. 9 is an efficiency curve of an exemplary structure of the antenna architecture shown in FIG. 6, and FIG. 10 is a simulation of the current and electric field in an exemplary structure of the antenna architecture shown in FIG. 6. FIG. 8 and FIG. 9 show the comparison results of the first feed antenna (11) (1 / 4 wavelength antenna) in two frequency bands of low-band LTE B20 (791 MHz ~ 862 MHz) and LTE B8 (880 MHz ~ 960 MHz). In FIGS. 8 and 9, the solid line represents the performance when the first feed antenna (11) (1 / 4 wavelength antenna) is not coupled to the first parasitic antenna (21) and the first part (10) and the second part (20) are in a closed state, and the dotted line represents the performance when the first feed antenna (11) (1 / 4 wavelength antenna) is coupled to the first parasitic antenna (21) (1 / 2 wavelength antenna) and the first part (10) and the second part (20) are in a closed state. In FIG. 8, the horizontal coordinate represents the frequency (in GHz units) and the vertical coordinate represents the reflection coefficient (in dB units). In FIG. 9, the horizontal coordinate represents the frequency (in GHz units) and the vertical coordinate represents the efficiency (in dB units). FIG. 10 is a simulation of the current and electric field in low-band LTE B20 (791 MHz ~ 862 MHz) when the first feed antenna (11) (1 / 4 wavelength antenna) and the first parasitic antenna (21) (1 / 2 wavelength antenna) are combined.

[0070] In the exemplary structure corresponding to FIGS. 8 to 10, the first feed antenna (11) is a frame antenna in the form of an inverted F-shaped antenna. The first parasitic antenna (21) is a frame antenna. When the first part (10) and the second part (20) are open, the first feed 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 and width of the electronic device (100) are approximately 4 mm and 3 mm, respectively. The width of the clearance area between the frame of the electronic device (100) and the ground plane (70) is approximately 1 mm. The gap width between two adjacent metal segments in the frame of the electronic device (100) is approximately 1.5 millimeters. The dielectric constant and loss angle of the insulating material used as an insulating segment between two adjacent metal segments and the insulating material filling the gap between the frame of the electronic device (100) and the ground plane (70) are 3.0 and 0.01, respectively. 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 closed, the distance 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.

[0071] As illustrated in FIGS. 8 and 9, when the first feed antenna (11) is coupled to the first parasitic antenna (21) in the low frequency band, the first excited resonant signal generated by the first parasitic antenna (21) expands the bandwidth of the first feed antenna (11) and reduces the adverse effect on the antenna performance of the first feed antenna (11) caused by the reduction in the length of the ground plane (70) and frame overlap in the closed state, thereby improving the antenna performance of the first feed antenna (11).

[0072] In FIG. 10, the first to third drawings of the first row are, respectively, schematic diagrams of the current of the first feed antenna (11), schematic diagrams of the current of the first parasitic antenna (21), and schematic diagrams of the electric field when the first feed antenna (11) is coupled to the first parasitic antenna (21) when the first part (10) and the second part (20) are in a closed state in the frequency band of 810 MHz, and the first to third drawings of the second row are, respectively, schematic diagrams of the current of the first feed antenna (11), schematic diagrams of the current of the first parasitic antenna (21), and schematic diagrams of the electric field when the first feed antenna (11) is coupled to the first parasitic antenna (21) when the first part (10) and the second part (20) are in a closed state in the frequency band of 840 MHz. As can be seen from FIG. 10, in FIG. 8, a resonance of a relatively low frequency is generated by the first feed antenna (11), and a resonance of a relatively high frequency is generated by the first parasitic antenna (21), and this is named the first excited resonance signal.

[0073] Optionally, the first parasitic antenna (21) may have a plurality of structural forms. For example, the first parasitic antenna (21) may be part of the frame (201) of the second part (20) of the electronic device (100) or may be fastened inside the frame (201) of the second part (20). In this embodiment, the case where the first parasitic antenna (21) is part of the frame (201) of the second part (20) is described as an example. The frame (201) of the first part (20) includes at least two metal segments and at least one insulating segment for electrically insulating the at least two metal segments. The first parasitic antenna (21) may be formed on one of the metal segments. In another embodiment, the first parasitic antenna (21) is fastened inside the frame (201) of the second part (20). In this case, the structural form of the first parasitic antenna (21) may be a flexible circuit board, laser direct structuring (LDS) metal, insert molding metal, or a wire of a printed circuit board.

[0074] Additionally, referring to FIG. 6, optionally, a matching circuit may be further disposed between the first feed circuit (12) and the first feed antenna (11), and the matching circuit is configured to match a 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, or a capacitor used as a bulking element. For example, the matching circuit may include at least one of a microstrip and a strip used as a distribution element.

[0075] Additionally, referring to FIGS. 6 and 7, optionally, the second part (20) further includes a second feed antenna (31). The second feed antenna (31) is electrically isolated from the first parasitic antenna (21). When the first part (10) and the second part (20) are open, the first parasitic antenna (21) can be coupled to the second feed antenna (31) to generate a second excited resonant signal through excitation. There may be one or more second excited resonant signals.

[0076] In this embodiment, when the first part (10) and the second part (20) are open, the first parasitic antenna (21) can be coupled to the second feed antenna (31), and a coupling capacitor is created between the first parasitic antenna (21) and the second feed antenna (31) so that a second excited resonant signal can be generated through coupling and excitation. When the second feed antenna (31) is operated, the radio frequency energy of the second feed antenna (31) is transferred to the first parasitic antenna (21) through coupling, and an additional resonant mode is generated through the excitation of the first parasitic antenna (21), thereby expanding the radiation frequency bandwidth of the antenna and improving the antenna performance of the electronic device (100). Since the first parasitic antenna (21) can be coupled to the first feed antenna (11) when the first part (10) and the second part (20) are in a closed state, and can be coupled to the second feed antenna (31) when the first part (10) and the second part (20) are in an open state, the electronic device (100) can multiplex the first parasitic antenna (21) to increase antenna utilization.

[0077] Optionally, when the first part (10) and the second part (20) are open, the first feed antenna (11), the second feed antenna (31), and the first parasitic antenna (21) are located in different corner regions of the electronic device (100). In this case, the first feed antenna (11) and the second feed antenna (31) can operate in a close frequency band, and the first feed antenna (11) and the second feed antenna (31) have a relatively wide space and a relatively low degree of mutual interference. The first parasitic antenna (21) can also be better coupled individually to the first feed antenna (11) and the second feed antenna (31) in two states.

[0078] In one embodiment, the second part (20) further includes a second feed circuit (32) and a second ground circuit (33). The second ground circuit (33) is connected to one end of the second feed antenna (31) and is configured to ground the second feed antenna (31). The end of the second feed antenna (31) connected to the second ground circuit (33) is the ground end. The other end of the second feed antenna (31) (i.e., the end away from the ground end) is an open end that is not grounded. The second feed circuit (32) is connected to the second feed antenna (31). The second feed circuit (32) is configured to feed the second feed antenna (31). The connection location of the second feed circuit (32) on the second feed antenna (31) is located between the connection location of the second ground circuit (33) on the second feed antenna (31) and the open end of the second feed antenna (31). In this case, the second feed antenna (31) is a grounded quarter-wave antenna. When the first part (10) and the second part (20) are open, the first parasitic antenna (21) is grounded. In this case, the electrical length of the first parasitic antenna (21) is a quarter-wave, that is, the first parasitic antenna (21) is a quarter-wave antenna. Since the electrical length of the first parasitic antenna (21) is adjustable, different electrical lengths may exist in different usage environments.

[0079] In this implementation, the coupling effect between the first parasitic antenna (21) and the second feed antenna (31) is excellent, and the bandwidth of the second feed antenna (31) can be expanded relatively significantly. To improve the coupling effect, for example, one end of the second feed antenna (31) away from the first parasitic antenna (21) is made a ground end, and one end of the second feed antenna (31) close to the first parasitic antenna (21) is made an open end.

[0080] For example, FIG. 11 is a reflection coefficient curve of another exemplary structure of the antenna architecture shown in FIG. 6, and FIG. 12 is an efficiency curve of another exemplary structure of the antenna architecture shown in FIG. 6. FIG. 11 and FIG. 12 are results of comparing the second feed antenna (31) (1 / 4 wavelength antenna) in two frequency bands: low-band LTE B20 (791 MHz to 862 MHz) and LTE B8 (880 MHz to 960 MHz). In FIG. 11 and FIG. 12, the solid line represents the performance when the first part (10) and the second part (20) are open while the second feed antenna (31) is not connected to the first parasitic antenna (21), and the dotted line represents the performance when the first part (10) and the second part (20) are open while the second feed antenna (31) is connected to the first parasitic antenna (21) (1 / 2 wavelength antenna). In Fig. 11, the horizontal coordinate represents frequency (in GHz) and the vertical coordinate represents reflection coefficient (in dB). In Fig. 12, the horizontal coordinate represents frequency (in GHz) and the vertical coordinate represents efficiency (in dB).

[0081] In the exemplary structure corresponding to FIGS. 11 and 12, the second feed antenna (31) is a frame antenna in the form of an inverted F-shaped antenna. The first parasitic antenna (21) is a frame antenna. When the first part (10) and the second part (20) are open, the second feed 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 and width of the electronic device (100) are approximately 4 mm and 3 mm, respectively. The width of the clearance area between the frame of the electronic device (100) and the ground plane (70) is approximately 1 mm. The gap width between two adjacent metal segments in the frame of the electronic device (100) is approximately 1.5 millimeters. The dielectric constant and loss angle of the insulating material used as an insulating segment between two adjacent metal segments and the insulating material filling the gap between the frame of the electronic device (100) and the ground plane (70) are 3.0 and 0.01, respectively. 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 closed, the distance 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.

[0082] From FIGS. 11 and 12, it can be seen that when the second feed antenna (31) is coupled to the first parasitic antenna (21) in the low frequency band, the second excited resonant signal generated from the first parasitic antenna (21) expands the bandwidth of the second feed antenna (31), thereby improving the antenna performance of the second feed antenna (31).

[0083] Additionally, referring to FIG. 6, optionally, a matching circuit may be further disposed between the second feed circuit (32) and the second feed antenna (31), and the matching circuit is configured to match a 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, or a capacitor used as a bulking element. For example, the matching circuit may include at least one of a microstrip and a strip used as a distribution element.

[0084] When the parasitic antenna is not grounded, its electrical length is N / 2 wavelengths, where N is a positive integer. When the parasitic antenna is grounded, its electrical length is M / 4 wavelengths, where M is a positive odd number.

[0085] In another embodiment, when the first part (10) and the second part (20) are open, the first parasitic antenna (21) may also be grounded (i.e., the first parasitic antenna (21) is a half-wave antenna). In this case, the coupling effect between the first parasitic antenna (21) and the second feed antenna (31) is reduced compared to the above-described embodiment, but the bandwidth of the second feed antenna (31) can still be extended.

[0086] Optionally, as illustrated in FIG. 6, the second part (20) further 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 configured to allow the electrical length of the first parasitic antenna (21) to be adjustable by connecting the first parasitic antenna (21) to ground or disconnecting the first parasitic antenna (21) from ground. For example, the switching circuit (22) is configured to disconnect the first parasitic antenna (21) from ground when the first part (10) and the second part (20) are in a closed state. In this case, the electrical length of the first parasitic antenna (21) is 1 / 2 wavelength. The switching circuit (22) is further configured to connect the first parasitic antenna (21) to ground when the first part (10) and the second part (20) are in an open state. In this case, the electrical length of the first parasitic antenna (21) is 1 / 4 wavelength.

[0087] In this embodiment, by arranging a switching circuit (22), the electrical length of the first parasitic antenna (21) can be adjusted, and the first parasitic antenna (21) can implement different coupling functions when the electronic device (100) is in a different usage state, so that the antenna can be multiplexed.

[0088] For example, the switching circuit (22) may include a tuning switch (221). The switching circuit (22) can switch the connection relationship between the first parasitic antenna (21) and ground by switching the tuning switch (221) between a closed state and an open state, and thereby adjust the electrical length of the first parasitic antenna (21). For example, the tuning switch (221) may be connected approximately to the middle portion of the first parasitic antenna (21). In this specification, the middle portion of the antenna includes a center position and another position slightly off from the center position, and the middle portion of the antenna is located between the two ends of the antenna. The middle portion of the first parasitic antenna (21) is located between the two ends of the first parasitic antenna (21).

[0089] As another example, the switching circuit (22) may include a tuning switch, a first matching branch, and a second matching branch. The first matching branch is different from the second matching branch. The control terminal of the tuning switch is connected to the first parasitic antenna (21), and the two selection terminals of the tuning switch are connected to the first matching branch and the second matching branch. By using the control terminal of the tuning switch to switch the connection between the first matching branch and the second matching branch, the switching circuit (22) switches the connection relationship between the first parasitic antenna (21) and ground, and accordingly, the electrical length of the first parasitic antenna (21) can be adjusted.

[0090] 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) based on the detection signal of the detection device (30), thereby enabling the switching circuit (22) to accurately adjust the electrical length of the first parasitic antenna (21) based on the state of the first part (10) and the second part (20). This allows the antenna performance of the electronic device (100) to be maintained more stably.

[0091] Optionally, as illustrated in FIG. 6, the first part (10) further includes a second parasitic antenna (41). When the first part (10) and the second part (20) are closed, the second parasitic antenna (41) is not grounded and is connected to the second feed antenna (31) to generate a third excited resonant signal through excitation. In this case, the second parasitic antenna (41) is a half-wave antenna. When the first part (10) and the second part (20) are open, the second parasitic antenna (41) may be located at the upper left side of the electronic device (100). The second parasitic antenna (41), the first feed antenna (11), the second feed antenna (31), and the first parasitic antenna (21) are located at different corner regions of the electronic device (100). When the first part (10) and the second part (20) are open, the second parasitic antenna (41) can be coupled to the first feed antenna (11) to generate a fourth excited resonant signal through this. In this case, the second parasitic antenna (41) can be grounded. The structural design of the second parasitic antenna (41) refers to the first parasitic antenna (21). For example, the first part (10) may also include a switching circuit (refer to switching circuit (22)) connected between the second parasitic antenna (41) and ground. In another embodiment, when the first part (10) and the second part (20) are open, the second parasitic antenna (41) can be coupled to the first feed antenna (11) without being grounded.

[0092] Optionally, in the antenna architecture illustrated in FIG. 6, the physical length of the metal segment where the switching circuit (22) and the first parasitic antenna (21) are located can be designed so that the first parasitic antenna (21) switches between a grounded state and an ungrounded state, that is, so that the electrical length of the first parasitic antenna (21) switches between 1 / 2 wavelength and 1 / 4 wavelength. If the above design is difficult to meet the adjustment requirements for the electrical length of the first parasitic antenna (21), one or more tuning circuits can be connected to the first parasitic antenna (21) so that the electrical length of the first parasitic antenna (21) meets the adjustment requirements through the adjustment of one or more tuning circuits.

[0093] For example, FIG. 13 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. Most of the technical details of the antenna architecture in this implementation that are identical to the technical details of the antenna architecture shown in the aforementioned implementation are not described again.

[0094] The second part (20) further 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 circuits (23) are configured to adjust the electrical length of the first parasitic antenna (21). One or more first tuning circuits (23) are connected to one end of the first parasitic antenna (21) to better perform the tuning function. For example, the second part (20) includes two first tuning circuits (23), and the two first tuning circuits (23) are individually connected to both ends of the first parasitic antenna (21). Of course, in other implementations, the connection location of one or more first tuning circuits (23) on the first parasitic antenna (21) may be different. This is not strictly limited in the specification.

[0095] The first tuning circuit (23) may include one or more of a switch, a capacitor, an inductor, and a low-pass high-pass filter. The specific structure of the first tuning circuit (23) is not strictly limited in this specification.

[0096] FIG. 14 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. Most of the technical details of the antenna architecture in this implementation that are identical to the technical details of the antenna architecture shown in the aforementioned implementation are not described again.

[0097] In this implementation, the second feed antenna (31) is located in the side edge region rather than the corner region of the second part (20), and when the first part (10) and the second part (20) are closed, the second parasitic antenna (41) located in the corner region can also be coupled to the second feed antenna (31). In this implementation, since the second feed antenna (31) is relatively far from the first parasitic antenna (21), the second feed antenna (31) is no longer coupled to the first parasitic antenna (21).

[0098] Similarly, in some examples, the first feed antenna (11) may also be located in the side edge region of the first part (10). When the first part (10) and the second part (20) are closed, the first parasitic antenna (21) located in the corner region may be coupled to the first feed antenna (11). The first feed antenna (11) is no longer connected to the second parasitic antenna (41). In this example, when the first part (10) and the second part (20) are open, the first feed antenna (11) and the second feed antenna (31) are located on both sides of the electronic device (100) so that both the first feed antenna (11) and the second feed antenna (31) have a relatively sufficient radiation space.

[0099] FIG. 15 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. Most of the technical details of the antenna architecture in this implementation that are identical to the technical details of the antenna architecture shown in the aforementioned implementation are not described again.

[0100] The second part (20) further includes a third feed circuit (52) and a first filter circuit (53). The third feed circuit (52) and the first filter circuit (53) are connected to different locations on the first parasitic antenna (21) and are configured to form a third feed antenna (51) on the first parasitic antenna (21). The radiation frequency band of the third feed antenna (51) is different from the radiation frequency band of the first feed antenna (11). For example, the first feed antenna (11) is a low-band antenna. The radiation frequency band of the third feed antenna (51) is a wireless local area network antenna, a local area wireless communication antenna, a mid-band and high-band antenna, a sub-6G antenna (frequency less than 6 GHz), a wireless charging antenna, etc. In this case, the first filter circuit (53) has low-pass and high-pass characteristics. For example, the first filter circuit (53) includes a high-pass low-pass filter (531).

[0101] In this case, the third feed antenna (51) and the first parasitic antenna (21) share the same radiator segment, so antenna utilization can be improved. Additionally, because the radiation frequency band of the third feed antenna (51) and the radiation frequency band of the first feed antenna (11) are different from each other, the third feed antenna (51) and the first feed antenna (11) are well insulated from each other without interfering.

[0102] The connection location of the third feed circuit (52) and the first filter circuit (53) on the first parasitic antenna (21) may be located between the connection location of the switching circuit (22) on the first parasitic antenna (21) and one end of the first parasitic antenna (21). For example, the first filter circuit (53) is closer to the middle part of the first parasitic antenna (21) than to one end of the first parasitic antenna (21). The connection location of the third feed circuit (52) on the first parasitic antenna (21) is located between the connection location of the first filter circuit (53) on the first parasitic antenna (21) and one end of the first parasitic antenna (21).

[0103] FIG. 16 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. Most of the technical details of the antenna architecture in this implementation that are identical to the technical details of the antenna architecture shown in the aforementioned implementation are not described again.

[0104] The electronic device (100) further includes a fourth feed antenna (81), a fourth feed circuit (82), and a second filter circuit (83). The fourth feed antenna (81) is electrically isolated adjacent to the first parasitic antenna (21). The fourth feed circuit (82) is connected to the fourth feed antenna (81). The fourth feed circuit (82) is configured to feed the fourth feed antenna (81). The second filter circuit (83) is connected to the first parasitic antenna (21). The radiation frequency band of the fourth feed antenna (81) is different from the radiation frequency band of the first feed antenna (11). For example, the first feed antenna (11) is a low-band antenna. The radiation frequency band of the fourth feed antenna (81) is a wireless local area network antenna, a local area wireless communication antenna, a mid-band and high-band antenna, a wireless charging antenna, etc. In this case, the second filter circuit (83) has low-pass and high-pass characteristics. For example, the second filter circuit (83) includes a high-pass low-pass filter (831).

[0105] In this case, antenna utilization can be increased by implementing multiplexing using the radiator portion where the first parasitic antenna (21) is located as a parasitic branch of the fourth feed antenna (81). Additionally, since the radiation frequency band of the fourth feed antenna (81) and the radiation frequency band of the first feed antenna (11) are different from each other, the fourth feed antenna (81) and the first feed antenna (11) do not interfere with each other and are well isolated.

[0106] The fourth feed antenna (81) may be located in the first part (10) or the second part (20). The connection position of the fourth feed antenna (81) on the first parasitic antenna (21) is located between the connection position of the switching circuit (22) on the first parasitic antenna (21) and the fourth feed antenna (81).

[0107] In other embodiments, the antenna architecture may include more feed antennas. These feed antennas may use different radiators, such as the first feed antenna (11), the first parasitic antenna (21), the second feed antenna (31), the second parasitic antenna (22), etc., or multiplex the same radiator. This is not strictly limited in the specification.

[0108] FIG. 17 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation, and FIG. 18 is a schematic diagram of the antenna architecture shown in FIG. 11 in a different usage state. FIG. 17 corresponds to a state where the first part (10) and the second part (20) are open. FIG. 18 corresponds to a state where the first part (10) and the second part (20) are closed. In FIG. 18, the antennas of the first part (10) and the second part (20) are shown staggered so that the antenna of the first part (10) may be located outside the antenna located in the second part (20) because they overlap in the closed state. Most of the technical details of the antenna architecture in this implementation that are identical to the technical details of the antenna architecture shown in the aforementioned implementation are not described again.

[0109] The second part (20) includes a second feed antenna (31), a second feed circuit (32), and a second ground circuit (33). The second feed antenna (31) is electrically isolated from the first parasitic antenna (21). The second ground circuit (33) is connected to the middle part of the second feed antenna (31). Both ends of the second feed antenna (31) are open ends that are not grounded. The second feed circuit (32) is connected to the second feed antenna (31) and configured to feed the second feed antenna (31). The connection location of the second feed circuit (32) on the second feed antenna (31) is located between the connection location of the second ground circuit (33) on the second feed antenna (31) and one end of the second feed antenna (31). In this case, the second feed antenna (31) is a half-wave antenna. The first parasitic antenna (21) is a floating antenna. That is, the first parasitic antenna (21) is not grounded.

[0110] In this embodiment, when the first part (10) and the second part (20) are open, the second feed antenna (31) has two antenna modes and has a relatively large bandwidth and relatively high antenna performance. Therefore, the second feed antenna (31) may not be coupled to the first parasitic antenna (21). When the first part (10) and the second part (20) are closed, the first feed antenna (11) is coupled to the first parasitic antenna (21) of 1 / 2 wavelength to improve the antenna performance of the first feed antenna (11) and reduce adverse effects from the external environment. In this case, in the antenna architecture, there is no need to switch between different antenna coupling types when the first part (10) and the second part (20) are in different states, that is, the first parasitic antenna (21) may be a single 1 / 2 wavelength antenna, and since there is no need to place a switching circuit (22), the structure of the antenna architecture is simpler.

[0111] For example, FIG. 19 is a reflection coefficient curve of the second feed antenna (31) in the exemplary structure of the antenna architecture shown in FIG. 17, FIG. 20 is an efficiency curve of the second feed antenna (31) in the exemplary structure of the antenna architecture shown in FIG. 17, and FIG. 21 is a simulation of the current, electric field, and radiation direction of the second feed antenna (31) in the exemplary structure of the antenna architecture shown in FIG. 17. FIG. 19 to 21 correspond to an exemplary structure in which the first part (10) and the second part (20) are open and the second feed antenna (31) is not coupled to the first parasitic antenna (21). In FIG. 20, the horizontal coordinate represents the frequency (in GHz) and the vertical coordinate represents the reflection coefficient (in dB). In FIG. 21, the horizontal coordinate represents the frequency (in GHz) and the vertical coordinate represents the efficiency (in dB). FIG. 21 corresponds to simulation diagrams of the second feed antenna (31) at 890 MHz and 960 MHz, respectively.

[0112] In the exemplary structure corresponding to FIGS. 19 to 21, the second feed antenna (31) is a half-wave antenna. The second feed antenna (31) is a frame antenna. The frame thickness and width of the electronic device (100) are approximately 4 mm and 3 mm, respectively. The width of the clearance area between the frame of the electronic device (100) and the ground plane (70) is approximately 1 mm. The gap width between two adjacent metal segments in the frame of the electronic device (100) is approximately 1.5 millimeters. The dielectric constant and loss angle of the insulating material used as the insulating segment between two adjacent metal segments and the insulating material filling the clearance area between the frame of the electronic device (100) and the ground plane (70) are 3.0 and 0.01, respectively.

[0113] As can be seen from FIGS. 19 to 21, when the second feed antenna (31) is a half-wavelength antenna, the second feed antenna (31) has two antenna modes with a relatively large bandwidth and relatively high antenna performance.

[0114] In some implementations, it may be understood that the second feed antenna (31) may also be coupled to the first parasitic antenna (21). In this case, a switching circuit (see switching circuit (22)) must be placed in the first parasitic antenna (21), but the antenna performance of the second feed antenna (31) is also improved to some extent when the first part (10) and the second part (20) are open.

[0115] Optionally, as illustrated in FIG. 17, the first feed antenna (11) may be a half-wavelength antenna. When the first part (10) and the second part (20) are open, the antenna performance of the first feed antenna (11) refers to the second feed antenna (31).

[0116] In this case, when the first part (10) and the second part (20) are open, the first feed antenna (11) and the second feed antenna (31) may be separately located in two corner areas diagonally positioned of the electronic device (100). The first parasitic antenna (21) and the second parasitic antenna (41) of the electronic device (100) may be located in two other corner areas diagonally positioned of the electronic device (100).

[0117] For example, FIG. 22 is a reflection coefficient curve of an exemplary structure of the antenna architecture shown in FIG. 17, and FIG. 23 is an efficiency curve of an exemplary structure of the antenna architecture shown in FIG. 17. In FIGS. 22 and 23, the solid line represents the performance when the first feed antenna (11) (1 / 2 wavelength antenna) is coupled to the first parasitic antenna (21) having an electrical length of 1 / 2 wavelength and the first part (10) and the second part (20) are in a closed state, the dotted line represents the performance when the first feed antenna (11) (1 / 2 wavelength antenna) is coupled to the first parasitic antenna (21) having an electrical length of 1 / 4 wavelength and the first part (10) and the second part (20) are in a closed state, and the dashed dotted line represents the performance when the first feed antenna (11) (1 / 2 wavelength antenna) is not coupled to the first parasitic antenna (21) and the first part (10) and the second part (20) are in an open state. In FIG. 22, the horizontal coordinate represents the frequency (in GHz units) and the vertical coordinate represents the reflection coefficient (in dB units). In Fig. 23, the horizontal coordinate represents frequency (in GHz units) and the vertical coordinate represents efficiency (in dB units).

[0118] In FIG. 22 and the exemplary structure corresponding to FIG. 22, the first feed 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 open, the first feed 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 and width of the electronic device (100) are approximately 4 mm and 3 mm, respectively. The width of the clearance area between the frame of the electronic device (100) and the ground plane (70) is approximately 1 mm. The gap width between two adjacent metal segments in the frame of the electronic device (100) is approximately 1.5 millimeters. The dielectric constant and loss angle of the insulating material used as an insulating segment between two adjacent metal segments and the insulating material filling the gap between the frame of the electronic device (100) and the ground plane (70) are 3.0 and 0.01, respectively. 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 closed, the distance 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.

[0119] As can be seen from FIGS. 22 and 23, when the first feed antenna (11) is coupled to the first parasitic antenna (21), the first excited resonant signal generated by the first parasitic antenna (21) through coupling and excitation is generated at the highest resonance. When the first part (10) and the second part (20) are closed and the first feed antenna (11) is coupled to the first parasitic antenna (21) having an electrical length of 1 / 2 wavelength, the antenna performance of the first feed antenna (11) is slightly lower than the antenna performance when the first part (10) and the second part (20) are open, but higher than the antenna performance when the first part (10) and the second part (20) are closed and the first feed antenna (11) is coupled to the first parasitic antenna (21) having an electrical length of 1 / 4 wavelength.

[0120] Optionally, the electronic device (100) further includes one or more second tuning circuits (not shown in the drawing). One or more second tuning circuits are connected to the first parasitic antenna (21) and configured to adjust the frequency band of the excited resonance of the first parasitic antenna (21) so that better antenna performance can be obtained when the first feed antenna (11) is coupled to the first parasitic antenna (21). Of course, in other embodiments, the physical length of the first parasitic antenna (21) is adjusted synchronously or individually so that better antenna performance can be obtained when the first feed antenna (11) is coupled to the first parasitic antenna (21).

[0121] Optionally, referring further to FIGS. 17 and 18, the electronic device (100) further comprises a fifth feed antenna (61), a fifth feed circuit (62), a fifth ground circuit (63), and a third parasitic antenna (71). The fifth feed 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 feed antenna (61) may be located in the first part (10), and the third parasitic antenna (71) may be located in the second part (20)). The fifth feed antenna (61) is electrically isolated from the first parasitic antenna (21) and the second feed antenna (31). The fifth feed circuit (62) is connected to the fifth feed antenna (61) and configured to feed the fifth feed antenna (61). The fifth grounding circuit (63) is connected to the fifth feed antenna (61) and configured so that the fifth feed antenna (61) is grounded. When the first part (10) and the second part (20) are closed, the third parasitic antenna (71) is not grounded and is connected to the fifth feed antenna (61) to generate a fifth excited resonant signal through excitation. In this case, the electrical length of the third parasitic antenna (71) is half a wavelength, that is, the third parasitic antenna (71) is a half wavelength antenna. In this implementation, the fifth feed antenna (61) may be configured to radiate medium frequency and high frequency signals.

[0122] FIG. 24 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 1 in a different implementation. FIG. 24 corresponds to the open state of the first part (10) and the second part (20). Most of the technical details of the antenna architecture in this implementation that are identical to the technical details of the antenna architecture shown in the aforementioned implementation are not described again.

[0123] In this embodiment, the second feed antenna (31) is located in the first part (10) instead of the second part (20). Specifically, the first part (10) further includes the second feed antenna (31), and the second feed antenna (31) is electrically insulated from the first feed antenna (11). In this case, since the second parasitic antenna (41) is located in the second part (20) rather than the first part (10), the second parasitic antenna (41) can be coupled to the second feed antenna (31) when the first part (10) and the second part (20) are closed.

[0124] The first feed antenna (11) and the second feed antenna (31) are positioned as far apart from each other as possible so that both the first feed antenna (11) and the second feed antenna (31) can have a relatively sufficient radiation space.

[0125] In this specification, the first feed antenna (11), the first parasitic antenna (21), the second feed antenna (31), and the second parasitic antenna (41) may be arranged in a plurality of ways, but with the first part (10) and the second part (20) closed, the first feed antenna (11) is connected to the first parasitic antenna (21), and the second feed antenna (31) is connected to the second parasitic antenna (41). This is not strictly limited in this specification.

[0126] FIG. 25 is a schematic diagram of the structure of an electronic device of a second embodiment according to the embodiments of the contents of this specification, and FIG. 26 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 25. Most of the technical details of the electronic device (100) shown in the second embodiment, which is identical to the electronic device (100) shown in the first embodiment, are not described again.

[0127] In the second embodiment, the rotating part (50) is not located in the central region of the electronic device (100) but is located away from the central region of the electronic device (100). Specifically, the electronic device (100) further includes the rotating part (50), the rotating part (50) connects the first part (10) and the second part (20), and the rotating part (50) is deformed so that the first part (10) and the second part (20) are folded or expanded by rotating relative to each other. The rotating part (50) is located away from the central region of the electronic device (100). In this case, the deviation between the centerline of the rotating part (50) and the centerline of the electronic device (100) is relatively large. When the first part (10) and the second part (20) are in a closed state, one end of either the first part (10) or the second part (20) protrudes relative to the other part. For example, in this embodiment, the rotating part (50) extends in 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, one end of the second part (20) separated 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 to partially face each other.

[0128] When the first part (10) and the second part (20) are open, the electronic device (100) includes two side edges (1001) that extend across the rotating part (50). The two side edges (1001) extend in a first direction (X). The first feed antenna (11) and the first parasitic antenna (21) are located on the same side edge (1001). In this case, when the first part (10) and the second part (20) are closed, the first feed antenna (11) and the first parasitic antenna (21) can be coupled to each other. The second feed antenna (31) and the first feed antenna (11) are located on different side edges (1001). In this case, both the first feed antenna (11) and the second feed antenna (31) have relatively large radiation spaces.

[0129] The first parasitic antenna (21) may extend from the side edge (1001) of the electronic device (100) along the edge of the corner region to the other edge (1002) of the electronic device (100). The second parasitic antenna (41) may extend from the other side edge (1001) of the electronic device (100) along the other corner region to the other side edge (1003) of the electronic device (100).

[0130] FIG. 27 is a schematic diagram of the structure of an electronic device of a third embodiment according to an embodiment of the present specification. Most of the technical details of the electronic device (100) shown in the third embodiment, which is identical to the electronic device (100) described above, are not described again.

[0131] The size of the first part (10) and the second part (20) of this embodiment is slightly different from the size of the first part (10) and the second part (20) of the previously described embodiment. In this embodiment, the rotating part (50) extends in the second direction (Y). In this embodiment, the conventional flip method of the first part (10) and the second part (20) is to flip to the left or right, whereas the conventional flip method of the previously described embodiment is to flip upward or downward. The conventional flip method of the first part (10) and the second part (20) of the electronic device (100) corresponds to the placement location of some components of the electronic device (100), for example, the placement location of an earpiece, the placement location of a front camera, etc.

[0132] FIG. 28 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 27.

[0133] The first part (10) includes a first feed antenna (11) and a second parasitic antenna (41). The second part (20) includes a second feed antenna (31) and a first parasitic antenna (21). When the first part (10) and the second part (20) are open, the first feed antenna (11), the second parasitic antenna (41), the second feed antenna (31), and the first parasitic antenna (21) are individually located in four corner regions of the electronic device (100). When the first part (10) and the second part (20) are closed, the first feed antenna (11) is coupled to the first parasitic antenna (21) having an electrical length of 1 / 2 wavelength, and the second feed antenna (31) is coupled to the second parasitic antenna (41) having an electrical length of 1 / 2 wavelength.

[0134] In this implementation, the first feed antenna (11) and the second feed antenna (31) are half-wavelength antennas, and the first parasitic antenna (21) and the second parasitic antenna (41) are half-wavelength floating antennas.

[0135] In another embodiment, the first feed antenna (11) and the second feed antenna (31) may alternatively be quarter-wave antennas. In this case, a switching circuit (see switching circuit (22)) is connected to each of the first parasitic antenna (21) and the second parasitic antenna (41), and the switching circuit is configured to switch the electrical length of the antennas.

[0136] FIG. 29 is a schematic diagram of the antenna architecture of the electronic device shown in FIG. 27.

[0137] The first part (10) includes a first feed antenna (11) and a second feed 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 open, the first feed antenna (11), the second parasitic antenna (41), the second feed antenna (31), and the first parasitic antenna (21) are located separately in four corner regions of the electronic device (100). When the first part (10) and the second part (20) are closed, the first feed antenna (11) is coupled to the first parasitic antenna (21) having an electrical length of 1 / 2 wavelength, and the second feed antenna (31) is coupled to the parasitic antenna (41) having an electrical length of 2 1 / 2 wavelength.

[0138] In this implementation, the first feed antenna (11) and the second feed antenna (31) are quarter-wave antennas. A switching circuit (see switching circuit (22)) is connected to each of the first parasitic antenna (21) and the second parasitic antenna (41), and the switching circuit is configured to switch the electrical length of the antenna.

[0139] In another embodiment, the first feed antenna (11) and the second feed antenna (31) may alternatively be half-wavelength antennas, in which case the first parasitic antenna (21) and the second parasitic antenna (41) are half-wavelength floating antennas.

[0140] In the above-described embodiment, the first part (10) and the second part (20) are switched between an open state and a closed state through relative rotation. In another embodiment, the first part (10) and the second part (20) may be alternately switched between an open state and a closed state through relative sliding. An example is as follows.

[0141] FIG. 30 is a schematic diagram of the structure of an electronic device of a fourth embodiment according to an embodiment of the present specification. Most of the technical details of the electronic device (100) shown in the third embodiment, which is identical to the electronic device (100) described above, are not described again.

[0142] 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). The first part (10) and the second part (20) can be folded in a closed state and extended in an open state when sliding relative to each other. 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 stacked vertically. When the first part (10) and the second part (20) are in an open state, a portion of the first part (10) and a portion of the second part (20) remain in a stacked state, and most of the first part (10) and most of the second part (20) are in an overlapping state, i.e., an extended state. In one implementation, when the first part (10) and the second part (20) are open, the first part (10) and the second part (20) can be completely misaligned.

[0143] In this embodiment, the case where the first part (10) is located above the second part (20) is described as an example. In other embodiments, the first part (10) may alternatively be located below the second part (20).

[0144] FIG. 31 is a schematic diagram of the antenna architecture of the electronic device illustrated in FIG. 30, and FIG. 32 is a schematic diagram of the antenna architecture illustrated in FIG. 31 in a different usage state. FIG. 31 corresponds to the structure when the first part (10) and the second part (20) are in an open state. FIG. 32 corresponds to the structure when the first part (10) and the second part (20) are in a closed state. In FIG. 32, since the antennas of 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 depicted staggered, so that the antenna of the first part (10) can be located outside the antenna located in the second part (20).

[0145] The first part (10) includes a first feed antenna (11), and the second part (20) includes a first parasitic antenna (21). When the first part (10) and the second part (20) are closed, the first parasitic antenna (21) is not grounded and is coupled to the first feed antenna (11), so that a first excited resonant signal can be generated through excitation. In this case, the electrical length of the first parasitic antenna (21) is half a wavelength, that is, the first parasitic antenna (21) is a half-wavelength antenna.

[0146] The second part (20) further includes a second feed antenna (31). When the first part (10) and the second part (20) are closed, the first feed antenna (11) and the second feed antenna (31) are separately located in two corner areas arranged diagonally on the electronic device (100). In this case, both the first feed antenna (11) and the second feed antenna (31) have relatively sufficient radiation space.

[0147] The first part (10) may further include a second parasitic antenna (41). When the first part (10) and the second part (20) are closed, the second parasitic antenna (41) is not grounded and is connected to the second feed antenna (31) to generate a third excited resonant signal through this. In this case, the electrical length of the second parasitic antenna (41) is half a wavelength, that is, the second parasitic antenna (41) is a half-wavelength antenna.

[0148] In another implementation, the second feed antenna (31) may alternatively be located in the first part (10). The second feed antenna (31) and the first feed antenna (11) are electrically insulated and are located separately in two diagonal corner regions of the first part (10). In this case, the second parasitic antenna (41) is located in the first part (10).

[0149] In other embodiments, the first part (10) and the second part (20) may alternatively be switched between an open and a closed state in a different manner (e.g., a detachable snap-fit ​​method). This may be specifically determined according to actual requirements and is not limited to this embodiment of the specification.

[0150] The foregoing description is merely a specific implementation of this specification and is not intended to limit the scope of protection of this specification. Any modification or substitution readily understood by a person skilled in the art within the technical scope disclosed in this specification will fall within the scope of protection of this specification. Unless there is a conflict, the embodiments and features of the embodiments of this specification may be combined with one another. Accordingly, the scope of protection of the contents of this specification is subject to the scope of protection of the claims.

Claims

Claim 1 As an electronic device (100), it comprises a first part (10) and a second part (20), wherein the first part (10) and the second part (20) are configured to be folded relative to each other in a closed state and to be expanded relative to each other in an open state, and when the first part (10) and the second part (20) are in the closed state, the first frame (101) of the first part (10) and the second frame (201) of the second part (20) are partially or entirely overlapped, and the first part (10) comprises a first feed antenna (11), a first feed circuit (12), and a first ground circuit (13), wherein the first feed circuit (12) is connected to the first feed antenna (11) and configured to feed power to the first feed antenna (11), wherein the first feed antenna (111) comprises a first open end and a ground end, and the first ground circuit (13) is at the ground end An electronic device (100) configured to be connected to the first feed antenna (11) and ground the first feed antenna (11), wherein the second part (20) includes a first parasitic antenna (21), and the first parasitic antenna (21) includes a second open end and a third open end, wherein the length of the first feed antenna (11) is shorter than the length of the first parasitic antenna (21), and when the first part (10) and the second part (20) are in a closed state, the first feed antenna (11) is configured to generate a first resonance, and the first parasitic antenna (21) is configured to be coupled to the first feed antenna (11) to generate a second resonance without being grounded. Claim 2 An electronic device (100) according to claim 1, wherein when the first part (10) and the second part (20) are in the closed state, the first parasitic antenna (21) is a 1 / 2 wavelength antenna. Claim 3 An electronic device (100) comprises a first part (10) and a second part (20), wherein the first part (10) and the second part (20) are configured to be folded relative to each other in a closed state and to be expanded relative to each other in an open state, and when the first part (10) and the second part (20) are in the closed state, the frame (101) of the first part (10) and the frame (201) of the second part (20) partially or entirely overlap, and the first part (10) comprises a first feed antenna (11), a first feed circuit (12), and a first ground circuit (13), wherein the first feed circuit (12) is connected to the first feed antenna (11) and configured to feed power to the first feed antenna (11), wherein the first feed antenna (111) comprises a first open end and a ground end, and the first ground circuit (13) is configured to feed the first at the ground end An electronic device (100) configured to be connected to a feed antenna (11) and ground the first feed antenna (11), wherein the second part (20) includes a first parasitic antenna (21), wherein the first parasitic antenna (21) includes a second open end and a third open end, wherein the length of the first feed antenna (11) is shorter than the length of the first parasitic antenna (21), wherein when the first part (10) and the second part (20) are in the closed state, the first feed antenna (11) is configured to generate a first resonance, and wherein the first parasitic antenna (21) is a half-wavelength antenna and is configured to be coupled to the first feed antenna (11) to generate a second resonance. Claim 4 An electronic device (100) in which, in any one of claims 1 to 3, when the first part (10) and the second part (20) are in the closed state, the first feed antenna (11) and the first parasitic antenna (21) overlap at least partially. Claim 5 An electronic device (100) according to any one of claims 1 to 3, wherein when the first part (10) and the second part (20) are in the closed state, the first feed antenna (11) is a quarter wavelength antenna. Claim 6 An electronic device (100) according to any one of claims 1 to 3, wherein the resonance frequency of the first resonance is lower than the resonance frequency of the second resonance. Claim 7 An electronic device (100) in which, in any one of claims 1 to 3, the frequency range of the first resonance and the frequency range of the second resonance partially overlap. Claim 8 An electronic device (100) wherein, in any one of claims 1 to 3, the second resonance is configured to be adjacent to the first resonance. Claim 9 An electronic device (100) according to any one of claims 1 to 3, wherein the second resonance is configured to extend the bandwidth of the first resonance in a low frequency band from 600 MHz to 960 MHz. Claim 10 An electronic device (100) according to any one of claims 1 to 3, wherein the first frame (101) comprises a first metal segment, a second metal segment, and a first insulating segment that electrically insulates the first metal segment and the second metal segment, and the first feed antenna (11) is formed on the first metal segment, and the second frame (201) comprises a third metal segment between the second insulating segment and the third insulating segment, and the first parasitic antenna (21) is formed on the third metal segment. Claim 11 An electronic device (100) according to any one of claims 1 to 3, wherein the second part (20) further comprises a second feed antenna (31), the second feed antenna (31) is electrically insulated from the first parasitic antenna (21), and when the first part (10) and the second part (20) are in the open state, the first parasitic antenna (21) is configured to be coupled to the second feed antenna (31) to generate a third resonance. Claim 12 In claim 11, the second part (20) further comprises a second feed circuit (32) and a second ground circuit (33), wherein the second ground circuit (33) is configured to be connected to one end of the second feed antenna (31) to ground the second feed antenna (31), the other end of the second feed antenna (31) is a fourth open end, and the second feed circuit (32) is connected to the second feed antenna (31), and the connection position of the second feed circuit (32) in the second feed antenna (31) is located between the connection position of the second ground circuit (33) in the second feed antenna (31) and the fourth open end, and when the first part (10) and the second part (20) are in the open state, the first parasitic antenna (21) is grounded, an electronic device (100). Claim 13 In claim 12, the second part (20) further 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, and the switching circuit (22) is configured to disconnect the first parasitic antenna (21) from ground when the first part (10) and the second part (20) are in the closed state, and is further configured to connect the first parasitic antenna (21) to ground when the first part (10) and the second part (20) are in the open state, an electronic device (100). Claim 14 An electronic device (100) wherein, in any one of claims 1 to 3, the second part (20) further comprises a first tuning circuit (23), and the first tuning circuit (23) is connected to the first parasitic antenna (21) and configured to adjust the electrical length of the first parasitic antenna (21). Claim 15 In claim 14, the electronic device (100) is connected to the end of the first tuning circuit (23) of the first parasitic antenna (21). Claim 16 In claim 11, the electronic device (100) further comprises a rotating part (50), the rotating part (50) connects the first part (10) and the second part (20), the rotating part (50) is deformable so that the first part (10) and the second part (20) rotate relative to each other to fold or expand, the rotating part (50) is located in the central region of the electronic device (100); and when the first part (10) and the second part (20) are in the open state, the first feed antenna (11), the second feed antenna (31) and the first parasitic antenna (21) are located in different corner regions of the electronic device (100). Claim 17 In claim 11, the electronic device (100) further comprises 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) rotate relative to each other to fold or expand, the rotating part (50) deviates from the central region of the electronic device (100), and when the first part (10) and the second part (20) are in the open state, the electronic device (100) comprises two side edges crossing the rotating part (50), the first feed antenna (11) and the first parasitic antenna (21) are located on the same side edge, and the second feed antenna (31) and the first feed antenna (11) are located on different side edges, the electronic device (100). Claim 18 In any one of claims 1 to 3, the electronic device (100) further comprises a sensing device (30), wherein the sensing device (30) is located in the first part (10) and / or the second part (20), and the sensing device (30) is configured to detect whether the first part (10) and the second part (20) are in the closed state or the open state.

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