electronic devices

Abstract

This application provides an electronic device including a first body, a second body, a feed source, a main radiating stub, and a parasitic stub. The main radiating stub supports a first frequency band under the action of an excitation signal provided by the feed source. The main radiating stub is disposed on the first body, and the parasitic stub is disposed on the second body. When the first body and the second body are folded or slid relative to each other so that at least part of the second body overlaps with the first body, the parasitic stub can couple with the main radiating stub and jointly support the second frequency band. When the orientation of the free end of the parasitic stub is the same as the orientation of the free end of the main radiating stub, the electrical length of the parasitic stub is less than one-quarter of the wavelength corresponding to the first frequency band. When the orientation of the free end of the parasitic stub is not the same as the orientation of the free end of the main radiating stub, the electrical length of the parasitic stub is greater than one-quarter of the wavelength corresponding to the first frequency band. Based on this, the parasitic stub can improve the system efficiency of the antenna system formed by the main radiating stub and the parasitic stub.

Description

[0001] This application claims priority to Chinese Patent Application No. 202111481019.9, filed on December 6, 2021, entitled “Electronic Device”, the contents of which are incorporated herein by reference in part. Technical Field

[0002] This application relates to the field of communication technology, and in particular to an electronic device. Background Technology

[0003] With the development of communication technology, electronic devices such as smartphones can be folded or slid, allowing them to have unfolded, folded, or sliding forms. Furthermore, electronic devices can include antenna radiators to provide mobile communication services.

[0004] However, compared to the unfolded form, the surrounding environment of the antenna radiator changes adversely when the electronic device is in a folded or sliding form, resulting in a decrease in the radiation performance of the antenna radiator. Summary of the Invention

[0005] This application provides an electronic device that can improve the radiation performance of the electronic device in a folded or sliding configuration.

[0006] This application provides an electronic device, including:

[0007] first ontology;

[0008] The second body can be folded or slid relative to the first body so that at least a portion of the second body overlaps with the first body;

[0009] A feed source is used to provide an excitation signal;

[0010] A main radiating branch, disposed on the first body, is electrically connected to the feed source, and is used to support a first frequency band under the action of the excitation signal; and

[0011] A parasitic branch, disposed on the second body, couples with the main radiating branch and jointly supports the second frequency band when at least a portion of the second body overlaps with the first body; wherein...

[0012] When at least a portion of the second body overlaps with the first body and the orientation of the free end of the parasitic branch is the same as the orientation of the free end of the main radiating branch, the electrical length of the parasitic branch is less than one-quarter of the wavelength corresponding to the first frequency band; or,

[0013] When at least a portion of the second body overlaps with the first body and the orientation of the free end of the parasitic branch is different from the orientation of the free end of the main radiating branch, the electrical length of the parasitic branch is greater than one-quarter of the wavelength corresponding to the first frequency band.

[0014] The electronic device of this application includes a first body, a second body, a feed source, a main radiating stub, and a parasitic stub. The main radiating stub supports a first frequency band under the action of an excitation signal provided by the feed source. The main radiating stub is disposed on the first body, and the parasitic stub is disposed on the second body. When the first body and the second body are folded or slid relative to each other so that at least part of the second body overlaps with the first body, the parasitic stub can couple with the main radiating stub and jointly support the second frequency band. Specifically, when the orientation of the free end of the parasitic stub is the same as the orientation of the free end of the main radiating stub, the electrical length of the parasitic stub can be less than one-quarter of the wavelength corresponding to the first frequency band; when the orientation of the free end of the parasitic stub is different from the orientation of the free end of the main radiating stub, the electrical length of the parasitic stub can be greater than one-quarter of the wavelength corresponding to the first frequency band. Based on this, the center frequency of the second frequency band jointly supported by the parasitic stub and the main radiating stub can be different from the center frequency of the first frequency band supported by the main radiating stub. The parasitic stub can improve the system efficiency of the antenna system formed by the main radiating stub and the parasitic stub, thereby making the radiation performance of the electronic device superior. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a first structure of an electronic device provided in an embodiment of this application.

[0017] Figure 2 for Figure 1 The diagram shows the structure of the electronic device in another configuration.

[0018] Figure 3 This is a schematic diagram of a second structure of an electronic device provided in an embodiment of this application.

[0019] Figure 4 for Figure 3 The diagram shows the structure of the electronic device in another configuration.

[0020] Figure 5 This is a schematic diagram of a third structure of an electronic device provided in an embodiment of this application.

[0021] Figure 6 for Figure 5 The diagram shows the structure of the electronic device in another configuration.

[0022] Figure 7 This is a schematic diagram of a fourth structure of an electronic device provided in an embodiment of this application.

[0023] Figure 8 for Figure 7 The diagram shows the structure of the electronic device in another configuration.

[0024] Figure 9 This is a fifth structural schematic diagram of the electronic device provided in the embodiments of this application.

[0025] Figure 10 for Figure 9 The diagram shows the structure of the electronic device in another configuration.

[0026] Figure 11 This is a sixth structural schematic diagram of the electronic device provided in the embodiments of this application.

[0027] Figure 12 for Figure 11 The diagram shows the structure of the electronic device in another configuration.

[0028] Figure 13 for Figure 2 The diagram shows a comparison of S-parameter curves with and without parasitic branches in the case of overlapping electronic devices.

[0029] Figure 14 for Figure 2 The diagram shows a comparison of antenna efficiency curves with and without parasitic stubs when electronic devices are in an overlapping state.

[0030] Figure 15 for Figure 4 The diagram shows the S-parameter curves when parasitic stubs of different electrical lengths are set in the overlapping state of electronic devices.

[0031] Figure 16 for Figure 4 The diagram shows the antenna efficiency curves when parasitic stubs of different electrical lengths are set in the overlapping state of electronic devices.

[0032] Figure 17 for Figure 2 The diagram shows the S-parameter curves when parasitic stubs with an electrical length greater than one-quarter of the wavelength corresponding to the first frequency band are set in the overlapping state of the electronic devices.

[0033] Figure 18 for Figure 2The diagram shows the antenna efficiency curve when a parasitic stub with an electrical length greater than one-quarter of the wavelength corresponding to the first frequency band is set in the overlapping state of the electronic devices.

[0034] Figure 19 for Figure 4 The diagram shows the S-parameter curves when parasitic stubs with an electrical length less than one-quarter of the wavelength corresponding to the first frequency band are set in the overlapping state of electronic devices.

[0035] Figure 20 for Figure 4 The diagram shows the antenna efficiency curve when parasitic stubs with an electrical length less than one-quarter of the wavelength corresponding to the first frequency band are set in the overlapping state of electronic devices.

[0036] Figure 21 This is a seventh structural schematic diagram of an electronic device provided in an embodiment of this application.

[0037] Figure 22 for Figure 2 The diagram shows a current flow direction of an electronic device.

[0038] Figure 23 This is an eighth structural schematic diagram of an electronic device provided in an embodiment of this application.

[0039] Figure 24 This is a ninth structural schematic diagram of an electronic device provided in an embodiment of this application.

[0040] Figure 25 This is a tenth structural schematic diagram of an electronic device provided in an embodiment of this application.

[0041] Figure 26 This is an eleventh structural schematic diagram of an electronic device provided in an embodiment of this application.

[0042] Figure 27 This is a schematic diagram of the twelfth structure of the electronic device provided in the embodiments of this application.

[0043] Figure 28 This is a schematic diagram of the thirteenth structure of the electronic device provided in the embodiments of this application.

[0044] Figure 29 This is a schematic diagram of the fourteenth structure of the electronic device provided in the embodiments of this application.

[0045] Figure 30 This is a schematic diagram of the fifteenth structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0046] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 30The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] This application provides an electronic device 100. The electronic device 100 can be a smartphone, tablet computer, or other similar device; it can also be a gaming device, augmented reality (AR) device, automotive device, data storage device, audio playback device, video playback device, laptop computer, desktop computing device, etc. Please refer to... Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a first structure of the electronic device 100 provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shows the electronic device 100 in another configuration. The electronic device 100 includes a first body 10, a second body 20, a main radiating branch 30, a parasitic branch 40, and a feed source 61.

[0048] The first body 10 and the second body 20 can be folded or slid towards each other so that at least part of the second body 20 and the first body 10 can overlap. A main radiating branch 30 can be disposed on the first body 10. The main radiating branch 30 can be electrically connected to a feed source 61, which can provide an excitation signal to the main radiating branch 30. Under the action of the excitation signal, the main radiating branch 30 can form a first resonance, which can propagate a first frequency band wireless signal in free space. The main radiating branch 30 can support the first frequency band under the action of the excitation signal. The parasitic branch 40 can be disposed on the second body 20. When the first body 10 and the second body 20 are folded or slid and at least part of the second body 20 overlaps with the first body 10, at least part of the parasitic branch 40 can overlap with the main radiating branch 30. The parasitic branch 40 can be electromagnetically coupled with the main radiating branch 30. The parasitic branch 40 and the main radiating branch 30 can jointly generate a second resonance. This second resonance can propagate the second frequency band wireless signal in free space. The parasitic branch 40 and the main radiating branch 30 can jointly support the second frequency band.

[0049] Among them, such as Figure 1 and Figure 2 As shown, when at least part of the second body 20 overlaps with the first body 10, the orientation of the free end of the parasitic branch 40, such as the first free end 41, can be the same as the orientation of the free end of the main radiating branch 30, such as the second free end 31. In this case, the electrical length of the parasitic branch 40 can be less than one-quarter of the wavelength corresponding to the first frequency band.

[0050] Among them, combined Figure 1 and Figure 2 Please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of a second structure of the electronic device 100 provided in an embodiment of this application. Figure 4 for Figure 3 The schematic diagram of the electronic device 100 in another configuration shows that when at least part of the second body 20 overlaps with the first body 10, the orientation of the free end of the parasitic branch 40, such as the first free end 41, may be different from the orientation of the free end of the main radiating branch 30, such as the second free end 31. In this case, the electrical length of the parasitic branch 40 may be greater than one-quarter of the wavelength corresponding to the first frequency band.

[0051] It is understandable that the free end of the parasitic branch 40 can be its ungrounded end, and the orientation of the free end of the parasitic branch 40 can be the direction of extension of the parasitic branch 40. Similarly, the free end of the main radiating branch 30 can be its ungrounded end, and the orientation of the free end of the main radiating branch 30 can be the direction of extension of the main radiating branch 30.

[0052] It is understandable that the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, which can mean that the orientations of their free ends are within the same region. For example, the orientation of the free end of the parasitic branch 40 can be exactly the same as the orientation of the free end of the main radiating branch 30, for instance... Figure 1 , Figure 2 In this configuration, the free ends of both the parasitic branch 40 and the main radiating branch 30 can extend vertically upwards. As another example, the orientation of the free end of the parasitic branch 40 can also form a certain angle with the orientation of the free end of the main radiating branch 30 and be within the same region. For example, but not limited to, the extension directions of their free ends can intersect and form a small angle, which can be greater than 0 degrees and less than 90 degrees.

[0053] It is understandable that the orientation of the free end of the parasitic branch 40 is different from that of the free end of the main radiating branch 30, which can mean that the orientations of their free ends are not within the same region. The orientation of the free end of the parasitic branch 40 can form a certain angle with the orientation of the free end of the main radiating branch 30 and be within different regions; the extension directions of their free ends can intersect and form a large angle, which can be greater than or equal to 90 degrees and less than or equal to 180 degrees. For example, in Figure 3 and Figure 4 In the middle, the free end of parasitic branch 40 can extend vertically upwards, and the free end of the main radiating branch 30 can extend to the right. The directions of extension of their free ends intersect and can form a 90-degree angle, but their free ends face different directions. For example, in the following text... Figure 21In the parasitic branch 40, the free end can extend vertically upward, and the free end of the main radiating branch 30 can extend downward. The extension directions of the free ends of the two intersect and can be 180 degrees apart, and the orientations of the free ends of the two are different.

[0054] The first body 10 and the second body 20 can be thin plate-like or sheet-like structures, or hollow frame structures. The first body 10 and the second body 20 provide support for the electronic components in the electronic device 100, allowing them to be mounted together. For example, electronic components in the electronic device 100 such as cameras, receivers, circuit boards with radio frequency circuits such as feedhorns 61, and power supplies can be mounted and fixed onto the first body 10 and the second body 20.

[0055] During the folding or sliding operation, the first body 10 and the second body 20 can switch between an overlapping state and an unfolded state.

[0056] For example, when the first body 10 and the second body 20 are folded, such as Figure 1 and Figure 3 As shown, the first body 10 and the second body 20 can move left and right and unfold relative to each other to an unfolded state; as Figure 2 and Figure 4 As shown, the first body 10 and the second body 20 can also move left and right and fold into an overlapping state. Furthermore, when the first body 10 and the second body 20 are in an overlapping state, as... Figure 2 As shown, the orientation of the free end of the parasitic branch 40, such as the first free end 41, can be the same as the orientation of the free end of the main radiating branch 30, such as the second free end 31; Figure 4 As shown, the orientation of the free end of the parasitic branch 40, such as the first free end 41, may be different from the orientation of the free end of the main radiating branch 30, such as the second free end 31.

[0057] It is understandable that the folding direction of the first body 10 and the second body 20 during the folding operation is not limited to... Figure 1 and Figure 2 The direction of the left and right folds is shown. For an example, please refer to... Figures 5 to 8 , Figure 5 This is a schematic diagram of a third structure of the electronic device 100 provided in the embodiments of this application. Figure 6 for Figure 5 The diagram shown is a structural schematic of the electronic device 100 in another configuration. Figure 7 This is a schematic diagram of the fourth structure of the electronic device 100 provided in the embodiments of this application. Figure 8 for Figure 7 The diagram shows the electronic device 100 in another configuration. Figure 5 and Figure 7 In the illustrated embodiment, the first body 10 and the second body 20 can move up and down and unfold relative to each other to an unfolded state during the folding operation; Figure 6 and Figure 8 In this embodiment, the first body 10 and the second body 20 can move up and down and fold into an overlapping state during the folding operation. Furthermore, when the first body 10 and the second body 20 are in an overlapping state, as... Figure 6 As shown, the orientation of the free end of the parasitic branch 40, such as the first free end 41, can be the same as the orientation of the free end of the main radiating branch 30, such as the second free end 31; Figure 8 As shown, the orientation of the free end of the parasitic branch 40, such as the first free end 41, may be different from the orientation of the free end of the main radiating branch 30, such as the second free end 31. Based on this, the specific folding method of the first body 10 and the second body 20 is not limited in the embodiments of this application.

[0058] For example, when the first body 10 and the second body 20 perform a sliding operation, please refer to... Figures 9 to 12 , Figure 9 This is a fifth structural schematic diagram of the electronic device 100 provided in the embodiments of this application. Figure 10 for Figure 9 The diagram shown is a structural schematic of the electronic device 100 in another configuration. Figure 11 This is a sixth structural schematic diagram of the electronic device 100 provided in the embodiments of this application. Figure 12 for Figure 11 The diagram shows the electronic device 100 in another configuration. Figure 9 and Figure 11 As shown, the first body 10 and the second body 20 can slide relatively far apart to an unfolded state; as Figure 10 and Figure 12 As shown, the first body 10 and the second body 20 can also slide towards each other until they overlap. Furthermore, when the first body 10 and the second body 20 are in an overlapping state, as... Figure 10 As shown, the orientation of the free end of the parasitic branch 40, such as the first free end 41, can be the same as the orientation of the free end of the main radiating branch 30, such as the second free end 31; Figure 12 As shown, the orientation of the free end of the parasitic branch 40, such as the first free end 41, may be different from the orientation of the free end of the main radiating branch 30, such as the second free end 31. This application embodiment does not limit the specific sliding method of the first body 10 and the second body 20.

[0059] It is understandable that, such as Figures 1 to 12As shown, the electronic device 100 may also include, but is not limited to, connecting structures 50 such as a hinge structure and a slide rail structure, so that the first body 10 and the second body 20 can be folded and slid relative to each other. For the specific structure of the connecting structures 50 such as the hinge structure and the slide rail structure, please refer to the descriptions in related technologies, which will not be detailed here.

[0060] It is understood that since both the first body 10 and the second body 20 have a certain thickness, when the first body 10 and the second body 20 are folded or slid over each other and are in an overlapping state, the first body 10 and the second body 20 can be stacked in the thickness direction. Furthermore, since the dimensions of the first body 10 and the second body 20 can be the same or different, in the overlapping state, all of the first body 10 can overlap with the second body 20, or only a portion of the first body 10 can overlap with the second body 20. This application does not limit the specific structure of the first body 10 and the second body 20 in the overlapping state.

[0061] The main radiating branch 30 and the parasitic branch 40 can be made of conductive material and can radiate wireless signals. For example, the main radiating branch 30 and the parasitic branch 40 can, but are not limited to, support Wireless Fidelity (Wi-Fi) signals, Global Positioning System (GPS) signals, 3rd-generation (3G), 4th-generation (4G), and 5th-generation (5G) mobile communication technologies. When the parasitic branch 40 is electromagnetically coupled to the main radiating branch 30, the parasitic branch 40 can jointly support the second frequency band wireless signals with the main radiating branch 30. In this case, the parasitic branch 40 can serve as an auxiliary radiating branch of the main radiating branch 30, and the parasitic branch 40 can improve the radiation performance of the antenna system formed by the main radiating branch 30 and the parasitic branch 40.

[0062] like Figure 1 , Figure 3 , Figure 5 , Figure 7 , Figure 9 , Figure 11As shown, when the first body 10 and the second body 20 are in the deployed state, the main radiating branch 30 and the parasitic branch 40 are far apart and do not overlap, and they do not generate electromagnetic coupling. At this time, the main radiating branch 30 can generate a first resonance independently under the excitation signal provided by the feed source 61 and support the first frequency band. It is understood that the electronic device 100 may also include a matching circuit 62, which can be connected in series between the feed source 61 and the main radiating branch 30. The matching circuit 62 can match the impedance of the feed source 61 when transmitting the excitation signal, so that the main radiating branch 30 can form a first resonance and support the first wireless signal of the first frequency band.

[0063] like Figure 2 , Figure 4 , Figure 6 , Figure 8 , Figure 10 , Figure 12 As shown, when the first body 10 and the second body 20 are in an overlapping state, at least a portion of the parasitic branch 40 can overlap with the main radiating branch 30, the projection of at least a portion of the parasitic branch 40 on the first body 10 can be located on the main radiating branch 30, the parasitic branch 40 can be electromagnetically coupled with the main radiating branch 30, the parasitic branch 40 and the main radiating branch 30 can jointly generate a second resonance different from the first resonance, and the parasitic branch 40 and the main radiating branch 30 can jointly support the second frequency band wireless signal. At this time, the parasitic branch 40 can serve as an auxiliary radiating branch of the main radiating branch 30.

[0064] Among them, such as Figure 2 , Figure 6 and Figure 10 As shown, when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 can be less than one-quarter of the wavelength corresponding to the first frequency band supported by the main radiating branch 30. The center frequency of the second frequency band jointly supported by the parasitic branch 40 and the main radiating branch 30 can be greater than the center frequency of the first frequency band. As an auxiliary branch of the main radiating branch 30, the second resonance formed by the parasitic branch 40 and the main radiating branch 30 can enhance the radiation performance of the first resonance formed by the main radiating branch 30.

[0065] For example, please refer to Figure 1 , Figure 2 Please refer to Figure 13 and Figure 14 , Figure 13 for Figure 2 The diagram shows a comparison of S-parameter curves of the electronic device 100 in an overlapping state with and without parasitic branches 40. Figure 14 for Figure 2The diagram shows a comparison of antenna efficiency curves with and without parasitic stubs 40 in the overlapping state of the electronic device 100. Figure 13 The middle curve S11 is Figure 2 The S-parameter curve of the electronic device 100 in the overlapping state is not set with parasitic branch 40 (or the electrical length of parasitic branch 40 is 0), and the curve S12 is... Figure 2 The S-parameter curve of an electronic device 100 in an overlapping state with a parasitic branch 40 (the electrical length of the parasitic branch 40 is less than one-quarter of the wavelength corresponding to the first frequency band). Figure 14 The middle curve S13 is Figure 2 The system efficiency curve of the electronic device 100 in the overlapping state without parasitic stub 40 (or with an electrical length of 0 for parasitic stub 40) is curve S14. Figure 2 The system efficiency curve is shown for an electronic device 100 in an overlapping state with a parasitic branch 40 (the electrical length of the parasitic branch 40 is less than one-quarter of the wavelength corresponding to the first frequency band). It should be noted that... Figure 14 The other two solid lines are the radiation efficiency curves corresponding to curves S13 and S14, which will not be described in detail here.

[0066] When at least part of the second body 20 overlaps with the first body 10, and the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, and the electrical length of the parasitic branch 40 is less than one-quarter of the wavelength corresponding to the first frequency band supported by the main radiating branch 30, it can be seen from the comparison of curves S11 and S12 that the center frequency of the second frequency band jointly supported by the parasitic branch 40 and the main radiating branch 30 can be greater than the center frequency of the first frequency band (the frequency of the resonant point on the right side of curve S12 is greater than the frequency of the resonant point on the left side); it can be seen from the comparison of curves S13 and S14 that the system efficiency of the electronic device 100 with the parasitic branch 40 can be improved by more than 2dB compared with the system efficiency of the electronic device 100 without the parasitic branch 40. As an auxiliary branch of the main radiating branch 30, the second resonance formed by the parasitic branch 40 and the main radiating branch 30 can improve the radiation performance of the first resonance formed by the main radiating branch 30. The radiation performance improvement effect of the electronic device 100 is very obvious.

[0067] Among them, such as Figure 4 , Figure 8 and Figure 12As shown, when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 can be greater than one-quarter of the wavelength corresponding to the first frequency band supported by the main radiating branch 30. The center frequency of the second frequency band jointly supported by the parasitic branch 40 and the main radiating branch 30 can be less than the center frequency of the first frequency band. As an auxiliary branch of the main radiating branch 30, the second resonance formed by the parasitic branch 40 and the main radiating branch 30 can enhance the radiation performance of the first resonance formed by the main radiating branch 30.

[0068] For example, please refer to Figure 3 , Figure 4 And refer to Figure 15 and Figure 16 , Figure 15 for Figure 4 The diagram shows a comparison of S-parameter curves for parasitic stubs 40 with different electrical lengths in an overlapping state of the electronic device 100. Figure 16 for Figure 4 The diagram shows a comparison of antenna efficiency curves for parasitic stubs 40 of different electrical lengths in an overlapping state of the electronic device 100. Figure 15 As shown, curve S1 is the S-parameter curve of the electronic device 100 when the electrical length of the parasitic branch 40 is 0 in the overlapping state of the first body 10 and the second body 20. That is, curve S1 is the S-parameter curve of the main radiating branch 30 when the parasitic branch 40 is not set in the overlapping state of the first body 10 and the second body 20; curve S2 is the S-parameter curve of the electronic device 100 when the parasitic branch 40 with a first electrical length is set in the overlapping state of the first body 10 and the second body 20; curve S3 is the S-parameter curve of the electronic device 100 when the parasitic branch 40 with a second electrical length is set in the overlapping state of the first body 10 and the second body 20. In this case, the first electrical length is less than the second electrical length, and both the first electrical length and the second electrical length are greater than one-quarter of the first frequency band. Figure 16 As shown, curve S4 is the system efficiency curve of the electronic device 100 when the electrical length of the parasitic branch 40 is 0 (i.e., no parasitic branch 40 is provided) in the overlapping state of the first body 10 and the second body 20; curve S5 is the system efficiency curve of the electronic device 100 when the parasitic branch 40 with a first electrical length is provided in the overlapping state of the first body 10 and the second body 20; curve S6 is the system efficiency curve of the electronic device 100 when the parasitic branch 40 with a second electrical length is provided in the overlapping state of the first body 10 and the second body 20. It should be noted that... Figure 8 The three dashed lines in the middle are the radiation efficiency curves corresponding to curves S4 to S6, which will not be described in detail here.

[0069] When at least a portion of the second body 20 overlaps with the first body 10, and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, and the electrical length of the parasitic branch 40 is greater than one-quarter of the wavelength corresponding to the first frequency band supported by the main radiating branch 30, it can be seen from curves S1 to S3 that the center frequency of the second frequency band jointly supported by the parasitic branch 40 and the main radiating branch 30 can be lower than the center frequency of the first frequency band (the frequency of the resonant point on the left in curves S2 and S3 is lower than the frequency of the resonant point on the right). Furthermore, the greater the electrical length of the parasitic branch 40, the lower the center frequency of the second frequency band jointly supported by the parasitic branch 40 and the main radiating branch 30, and the second frequency band can shift to lower frequencies.

[0070] Correspondingly, comparing curves S4 to S6, the system efficiency of the electronic device 100 with the parasitic stub 40 is significantly improved compared to the electronic device 100 without the parasitic stub 40. Furthermore, the larger the electrical length of the parasitic stub 40, the greater the system efficiency of the antenna system formed by the main radiating stub 30 and the parasitic stub 40, and the better the radiation performance of the electronic device 100. For example, comparing curves S4 and S6, compared to the scheme without the parasitic stub 40, the electronic device 100 with the longer second electrical length parasitic stub 40 shows an approximately 1.7 dB improvement in the system efficiency of the antenna system formed by the main radiating stub 30 and the parasitic stub 40, demonstrating a very significant improvement in the radiation performance of the electronic device 100. In the electronic device 100 of this application embodiment, the parasitic branch 40 serves as an auxiliary branch of the main radiating branch 30. The second resonance formed by the parasitic branch 40 and the main radiating branch 30 can enhance the radiation performance of the first resonance formed by the main radiating branch 30, and the radiation performance enhancement effect of the electronic device 100 is very significant.

[0071] Understandably, the first frequency band can correspond to a frequency range. For example, the first frequency band could be the GSM900 band, with a corresponding frequency range of 890MHz to 960MHz and a center frequency of 900MHz. In this case, the electrical length of the parasitic stub 40 being greater than or less than one-quarter of the wavelength corresponding to the first frequency band can mean that the electrical length of the parasitic stub 40 is greater than or less than one-quarter of the wavelength corresponding to the center frequency (e.g., 900MHz) of the first frequency band (e.g., the GSM900 band); or it can mean that the electrical length of the parasitic stub 40 is greater than or less than one-quarter of the wavelength corresponding to the smallest frequency (e.g., 890MHz) in the first frequency band (e.g., the GSM900 band).

[0072] It is understandable that electrical length can refer to effective electrical length. Generally speaking, due to the influence of the shape of the radiating stub and the capacitance, resistance, inductance, and other components in the electrical connections of the radiating stub, the electrical length or effective electrical length of the radiating stub often differs from the actual physical length of the radiating stub. For example, as... Figure 1As shown, when the parasitic stub 40 is not equipped with a tuning circuit or matching circuit to change its effective electrical length, the electrical length of the parasitic stub 40 is equal to the physical length between its two ends (grounded end and free end). When the parasitic stub 40 is equipped with a tuning circuit or matching circuit to change its effective electrical length, the electrical length of the parasitic stub 40 can be greater than or less than the physical length between its two ends. In actual debugging, the shape of the parasitic stub 40 and the capacitors, inductors, resistors, and other components in the electrical connections can be adjusted to make the electrical length of the parasitic stub 40 greater than or less than one-quarter of the wavelength corresponding to the first frequency band. The specific debugging method will not be elaborated here.

[0073] Wherein, when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 needs to be less than one-quarter of the wavelength corresponding to the first frequency band. If the electrical length of the parasitic branch 40 is greater than one-quarter of the wavelength corresponding to the first frequency band, the parasitic branch 40 cannot work with the main radiating branch 30 to improve the radiation performance when the main radiating branch 30 forms the first resonance.

[0074] For example, please refer to Figure 17 and Figure 18 , Figure 17 for Figure 2 The diagram shows the S-parameter curves of an electronic device 100 in an overlapping state when a parasitic stub 40 with an electrical length greater than one-quarter of the wavelength corresponding to the first frequency band is set. Figure 18 for Figure 2 The diagram shows the antenna efficiency curve when an electronic device 100, in an overlapping state, has a parasitic stub 40 with an electrical length greater than one-quarter of the wavelength corresponding to the first frequency band. Figure 17 As shown, curve S15 is the S-parameter curve of the electronic device 100 when the electrical length of the parasitic branch 40 is 0 (no parasitic branch 40 is set) in the overlapping state of the first body 10 and the second body 20. Curve S16 is the S-parameter curve of the electronic device 100 when the parasitic branch 40 with a third electrical length is set in the overlapping state of the first body 10 and the second body 20, and the free end orientation of the parasitic branch 40 is the same as the free end orientation of the main radiating branch 30, wherein the third electrical length is greater than one-quarter of the wavelength corresponding to the first frequency band. Figure 18 As shown, curve S17 is the system efficiency curve of the electronic device 100 when the electrical length of the parasitic branch 40 is 0 (no parasitic branch 40 is provided) in the overlapping state of the first body 10 and the second body 20; curve S18 is the system efficiency curve of the electronic device 100 when a parasitic branch 40 with a third electrical length is provided in the overlapping state of the first body 10 and the second body 20, and the free end orientation of the parasitic branch 40 is the same as the free end orientation of the main radiating branch 30. It should be noted that... Figure 18The other solid line is the radiation efficiency curve of electronic device 100 corresponding to curve S18, which will not be described in detail here.

[0075] Comparing curves S15 and S16, it can be seen that the larger the electrical length of the parasitic stub 40, the lower the center frequency of the second frequency band supported by the parasitic stub 40 and the main radiating stub 30, and the second frequency band can shift to a lower frequency (the frequency of the resonant point on the left in curve S16 is lower than the frequency of the resonant point on the right). Correspondingly, comparing curves S17 and S18, when the electrical length of the parasitic stub 40 is greater than one-quarter of the wavelength corresponding to the first frequency band, the antenna system formed by the main radiating stub 30 and the parasitic stub 40 will form an efficiency dip at the GSM900 frequency (at the first frequency band) (curve S16 dips downward at the GSM900 frequency). The system efficiency of the antenna system at 0.9 GHz (at the first frequency band) decreases by about 3 dB, and the radiation performance of the electronic device 100 will actually deteriorate. Based on this, when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 needs to be less than one-quarter of the wavelength corresponding to the first frequency band.

[0076] Wherein, when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 in this embodiment needs to be greater than one-quarter of the wavelength corresponding to the first frequency band supported by the main radiating branch 30. If the electrical length of the parasitic branch 40 is less than one-quarter of the wavelength corresponding to the first frequency band, the parasitic branch 40 cannot work with the main radiating branch 30 to improve the radiation performance when the main radiating branch 30 forms the first resonance.

[0077] For example, please refer to Figure 19 and Figure 20 , Figure 19 for Figure 4 The diagram shows the S-parameter curves of an electronic device 100 in an overlapping state when a parasitic branch 40 with an electrical length less than one-quarter of the wavelength corresponding to the first frequency band is set. Figure 20 for Figure 4 The diagram shows the antenna efficiency curve when an electronic device 100, in an overlapping state, has a parasitic stub 40 with an electrical length less than one-quarter of the wavelength corresponding to the first frequency band. Figure 19As shown, curve S7 is the S-parameter curve of the electronic device 100 when the electrical length of the parasitic branch 40 is 0 (when the parasitic branch 40 is not set) in the overlapping state of the first body 10 and the second body 20. Curve S8 is the S-parameter curve of the electronic device 100 when the parasitic branch 40 with a third electrical length is set in the overlapping state of the first body 10 and the second body 20, and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, wherein the third electrical length is less than one-quarter of the wavelength corresponding to the first frequency band. Figure 20 As shown, curve S9 is the system efficiency curve of the electronic device 100 when the electrical length of the parasitic branch 40 is 0 (no parasitic branch 40 is provided) in the overlapping state of the first body 10 and the second body 20; curve S10 is the system efficiency curve of the electronic device 100 when a parasitic branch 40 with a third electrical length is provided in the overlapping state of the first body 10 and the second body 20, and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30. It should be noted that... Figure 10 The other dashed line and solid line are the radiation efficiency curves corresponding to curves S9 and S10, which will not be described in detail here.

[0078] Comparing curves S7 and S8, it can be seen that the smaller the electrical length of the parasitic branch 40, the higher the center frequency of the second frequency band supported by the parasitic branch 40 and the main radiating branch 30, and the second frequency band can shift to higher frequencies. Correspondingly, comparing curves S9 and S10, when the electrical length of the parasitic branch 40 is less than one-quarter of the wavelength corresponding to the first frequency band, the antenna system formed by the main radiating branch 30 and the parasitic branch 40 will form an efficiency dip at the GSM900 frequency, and the system efficiency of the antenna system at 0.9 GHz will decrease by about 3 dB, thus deteriorating the radiation performance of the electronic device 100. Therefore, when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 in this embodiment needs to be greater than one-quarter of the wavelength corresponding to the first frequency band supported by the main radiating branch 30.

[0079] It is understandable that when the main radiating branch 30 and the parasitic branch 40 generate electromagnetic coupling as the first body 10 and the second body 20 fold or slide, the second frequency band jointly supported by the main radiating branch 30 and the parasitic branch 40 and the first frequency band supported by the main radiating branch 30 can at least partially overlap. For example, the first frequency band can be 890MHz to 960MHz, and the second frequency band can be 680MHz to 910MHz, and the two can overlap within the 890MHz to 910MHz frequency band range.

[0080] It is understood that the first frequency band and the second frequency band can be two frequency bands with different center frequencies within the same frequency band range (e.g., both within the GSM900 frequency band range). The first frequency band and the second frequency band can at least partially overlap, so that the main radiating branch 30 and the parasitic branch 40 can jointly support wireless signals, such as wireless signals supporting the GSM900 frequency band.

[0081] Therefore, in the electronic device 100 of this application embodiment, the main radiating branch 30 can form a first resonance and support wireless signals of the first frequency band. The main radiating branch 30 is disposed on the first body 10 and the parasitic branch 40 is disposed on the second body 20. When the first body 10 and the second body 20 are folded or slid relative to each other so that at least part of the second body 20 overlaps with the first body 10, at least part of the parasitic branch 40 can overlap with the main radiating branch 30 and couple with the main radiating branch 30. The parasitic branch 40 can form a second resonance together with the main radiating branch 30 and jointly support the second frequency band. When at least a portion of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 is less than one-quarter of the wavelength corresponding to the first frequency band. When at least a portion of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 can be greater than one-quarter of the wavelength corresponding to the first frequency band. Based on this, the parasitic branch 40 can reduce the loss caused by the matching circuit when the main radiating branch 30 supports the first wireless signal. The parasitic branch 40 and the main radiating branch 30 can jointly support the first wireless signal and improve the system efficiency of the antenna system formed by the main radiating branch 30 and the parasitic branch 40, thereby making the radiation performance of the electronic device 100 better.

[0082] Please refer to this again. Figures 1 to 4 The first body 10 may include a first side 12 and a second side 13 that are bent and connected, the first side 12 and the second side 13 are not collinear and intersect each other. The second body 20 may include a third side 22, which may be disposed opposite to the first side 12. For example, the third side 22 and the first side 12 have the same orientation, and the third side 22 may be parallel to the first side 12.

[0083] The parasitic branch 40 may include a first free end 41 and a first grounded end 42 disposed opposite to each other. The first grounded end 42 may be grounded, and the first free end 41 may be ungrounded. At least a portion of the parasitic branch 40 may be disposed on the third side 22. The main radiating branch 30 may include a second free end 31 and a second grounded end 32 disposed opposite to each other. The second grounded end 32 may be grounded, and the second free end 31 may be ungrounded. At least a portion of the main radiating branch 30 may be disposed on the first side 12.

[0084] like Figure 1As shown, all the parasitic branches 40 can be located on the third side 22, and all the main radial branches 30 can be located on the first side 12. The free ends of the main radial branches 30, such as the second free end 31, and the free ends of the parasitic branches 40, such as the first free end 41, can both extend in a direction away from the second side 13. Figures 1 to 4 (It can extend upwards), so that the orientation of the free end of the parasitic branch 40 can be the same as the orientation of the free end of the main radiating branch 30.

[0085] like Figure 3 As shown, the main radiating branch 30 can be located on the first side 12 and the second side 13, and the parasitic branch 40 can be located on the third side 22. The free end of the main radiating branch 30, such as the second free end 31, can extend in a direction away from the first side 12, and the free end of the parasitic branch 40, such as the first free end 41, can extend in a direction away from the second side 13, so that the orientation of the free end of the parasitic branch 40, such as the first free end 41, is different from the orientation of the free end of the main radiating branch 30, such as the second free end 31. In this case, when the user holds the electronic device 100, it is not easy to hold the entire main radiating branch 30, which can reduce the impact of the user's grip on the radiation performance of the main radiating branch 30.

[0086] It should be noted that the orientation of the free end of the main radiating branch 30 and the free end of the parasitic branch 40 in the same direction is not limited to... Figure 1 As shown, for example, but not limited to, the main radiating branch 30 can be located on the first side 12 and the second side 13, with its second free end 31 extending in a direction away from the second side 13 so as to have the same orientation as the free end of the parasitic branch 40. Similarly, the arrangement in which the free end of the main radiating branch 30 and the free end of the parasitic branch 40 are not oriented in the same direction is not limited to... Figure 3 As shown, for example but not limited to, please refer to Figure 21 , Figure 21 This is a seventh structural schematic diagram of the electronic device 100 provided in this application embodiment. The main radiating branch can be disposed on the first side 12, and its second free end 31 can extend in the direction of the second side 13 so as to be in a different direction from the free end of the parasitic branch 40. Based on this, this application embodiment does not limit the specific structure of the main radiating branch 30 and the parasitic branch 40.

[0087] Among them, such as Figure 1 As shown, when at least a portion of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, the projection of at least a portion of the first free end 41 onto the second free end 31 can be located on the second free end 31, and at least a portion of the first free end 41 can overlap with the second free end 31.

[0088] Of course, such as Figure 21As shown, when at least a portion of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, the projection of at least a portion of the first free end 41 onto the second free end 31 can also be located on the second free end 31, and at least a portion of the first free end 41 can overlap with the second free end 31. Based on this, in the electronic device 100 of this application embodiment, when the orientation of the free end of the parasitic branch 40 is the same as or different from the orientation of the free end of the main radiating branch 30 in the overlapping state, the parasitic branch 40 and the main radiating branch 30 can be designed so that at least a portion of the first free end 41 can overlap with the second free end 31.

[0089] In the electronic device 100 of this application embodiment, when the main radiating branch 30 forms a first resonance and when the main radiating branch 30 and the parasitic branch 40 jointly form a second resonance, current can flow from the ground terminal of the main radiating branch 30 and the parasitic branch 40 to the free end, and the current at the free end is larger. When the first free end 41 and the second free end 31 overlap with the movement of the first body 10 and the second body 20, the current on the second free end 31 is more easily coupled to the first free end 41, thereby more easily exciting the parasitic branch 40 to generate the second resonance.

[0090] It should be noted that when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is the same as or different from the orientation of the free end of the main radiating branch 30, the first free end 41 in this embodiment may not overlap with the second free end 31, for example... Figure 3 and Figure 4 As shown. The specific structure of the parasitic branch 40 and the main radiating branch 30 is not limited in the embodiments of this application.

[0091] In this regard, please combine Figure 1 , Figure 2 Please refer to Figure 22 , Figure 22 for Figure 2 The diagram shows a current flow direction of the electronic device 100. When at least part of the second body 20 overlaps with the first body 10 and the orientation of the first free end 41 is the same as the orientation of the second free end 31, the first current I1 flowing on the main radiating branch 30 can flow from the second ground end 32 to the second free end 31, and the second current I2 flowing on the parasitic branch 40 can flow from the first ground end 42 to the first free end 41. Thus, the first current I1 and the second current I2 flow in the same direction, and the magnetic field generated by the main radiating branch 30 can be in the same direction as the magnetic field generated by the parasitic branch 40. The two can be superimposed, so the parasitic branch 40 can further improve the radiation performance of the antenna system formed by the main radiating branch 30 and the parasitic branch 40.

[0092] Understandably, when the main radiating stub 30 forms a first resonance and supports the wireless signal of the first frequency band under the excitation signal provided by the feed source 61, the electrical length of the main radiating stub 30 can be equal to one-quarter of the wavelength corresponding to the first frequency band. At this time, the input impedance on the main radiating stub 30 is purely resistive, which is more conducive to the main radiating stub 30 forming the first resonance. Of course, the electrical length of the main radiating stub 30 can also be less than or greater than one-quarter of the wavelength corresponding to the first frequency band. In this case, the resonance of the main radiating stub 30 can be adjusted by the matching circuit 62.

[0093] It is understandable that when at least part of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 can be greater than one-quarter of the first frequency band, or less than or equal to one-third of the first frequency band. When the electrical length of the parasitic branch 40 is greater than one-third of the first frequency band, the center frequency of the second frequency band shifts a larger distance towards the lower frequency band, and the contribution of the parasitic branch 40 to improving the radiation efficiency of the main radiating branch 30 is smaller. In the embodiments of this application, the effective electrical length of the parasitic branch 40 is between one-quarter and one-third of the wavelength. On the one hand, the parasitic branch 40 can better improve the radiation efficiency of the main radiating branch 30; on the other hand, it can also save the cost of the parasitic branch 40.

[0094] Please refer to the following: Figure 23 and Figure 24 , Figure 23 This is an eighth structural schematic diagram of the electronic device 100 provided in the embodiments of this application. Figure 24 This is a ninth structural schematic diagram of the electronic device 100 provided in the embodiments of this application. When the feed source 61 provides other excitation signals to the main radiating stub 30, the main radiating stub 30 can also form a third resonance under the action of the excitation signal provided by the feed source 61. The third resonance can propagate wireless signals of the third frequency band in free space. The main radiating stub 30 can support the third frequency band. At this time, the electronic device 100 can also include a control circuit 63.

[0095] The control circuit 63 can be electrically connected to the parasitic branch 40. The control circuit 63 can change the shape or electrical length of the parasitic branch 40 to control whether the parasitic branch 40 is electromagnetically coupled to the main radiating branch 30. For example, when the main radiating branch 30 supports a third frequency band and at least part of the second body 20 overlaps with the first body 10, the control circuit 63 can control the parasitic branch 40 to not couple with the main radiating branch 30, thus decoupling the parasitic branch 40 from the main radiating branch 30. Alternatively, the control circuit 63 can control the parasitic branch 40 to electromagnetically couple with the main radiating branch 30 when the main radiating branch 30 forms a first resonance and at least part of the second body 20 overlaps with the first body 10.

[0096] It is understood that the control circuit 63 may include, but is not limited to, a circuit structure formed by one or more switches, resistors, capacitors, and inductors. For example, the control circuit 63 may include a switching element connected in series between the first ground terminal 42 and the ground plane. The switching element can control whether the parasitic stub 40 is electromagnetically coupled to the main radiating stub 30 that generates the third resonance by controlling whether the first ground terminal 42 is grounded. As another example, the control circuit 63 may include a short-circuit circuit or an open-circuit circuit connected in series between the first ground terminal 42 and the first free terminal 41 of the parasitic stub 40. The control circuit 63 can change the electrical length of the parasitic stub 40 by the short-circuit circuit or the open-circuit circuit, so that at this electrical length, the parasitic stub 40 cannot electromagnetically couple to the main radiating stub 30 that generates the third resonance.

[0097] It should be noted that the specific structure of the control circuit 63 is not limited to the examples above. Other structures that can control the electromagnetic coupling or decoupling between the parasitic branch 40 and the main radiating branch 30 are all within the protection scope of the embodiments of this application, and the embodiments of this application do not make specific limitations on this.

[0098] In this embodiment, the main radiating stub 30 can generate a first resonance or a third resonance, and the main radiating stub 30 can support a first frequency band and a second frequency band. The main radiating stub 30 is multiplexed, and the electronic device 100 can be miniaturized. Simultaneously, the control circuit 63 can control the parasitic stub 40 to prevent electromagnetic coupling with the main radiating stub 30 generating the third resonance. The parasitic stub 40 will not adversely affect the main radiating stub 30 generating the third resonance, thus ensuring the radiation performance of the main radiating stub 30 when generating the third resonance.

[0099] Please refer to the following: Figure 25 and Figure 26 , Figure 25 This is a tenth structural schematic diagram of the electronic device 100 provided in the embodiments of this application. Figure 26 This is an eleventh structural schematic diagram of the electronic device 100 provided in an embodiment of this application. The electronic device 100 may further include an adjustment circuit 64.

[0100] The adjustment circuit 64 can be electrically connected to the parasitic branch 40. When the main radiating branch 30 supports the third frequency band and at least part of the second body 20 overlaps with the first body 10, the adjustment circuit 64 can adjust the electrical length of the parasitic branch 40 so that the parasitic branch 40 can couple with the main radiating branch 30 and jointly generate a fourth resonance. The parasitic branch 40 can jointly support the fourth frequency band with the main radiating branch 30.

[0101] It is understandable that, such as Figure 25As shown, when at least a portion of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is the same as the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 can be less than one-quarter of the wavelength corresponding to the third frequency band. In this case, the parasitic branch 40 can improve the radiation efficiency of the main radiating branch 30 when it generates the third resonance, thus giving the electronic device 100 superior radiation performance.

[0102] It is understandable that, such as Figure 26 As shown, when at least a portion of the second body 20 overlaps with the first body 10 and the orientation of the free end of the parasitic branch 40 is different from the orientation of the free end of the main radiating branch 30, the electrical length of the parasitic branch 40 can be greater than one-quarter of the wavelength corresponding to the second frequency band. In this case, the parasitic branch 40 can improve the radiation efficiency of the main radiating branch 30 when it generates the third resonance, thus giving the electronic device 100 superior radiation performance.

[0103] It is understood that the adjustment circuit 64 may include, but is not limited to, a circuit structure formed by one or more switches, resistors, capacitors, and inductors. The adjustment circuit 64 may also set the resistance value of the resistor, the capacitance value of the capacitor, and the inductance value of the inductor. The adjustment circuit 64 may change the electrical length of the parasitic stub 40 so that for each resonance (each supported frequency band) of the main radiating stub 30, the parasitic stub 40 can have a corresponding electrical length, such that the parasitic stub 40 can be electromagnetically coupled to the main radiating stub 30 under that resonance (that frequency band), and that the electrical length of the parasitic stub 40 at this time is greater than or less than one-quarter of the wavelength of the wireless signal formed by the main radiating stub 30 under that resonance (that frequency band).

[0104] For example, when the main radiating stub 30 can form N kinds of resonances, the adjustment circuit 64 can include N adjustment branches. When the main radiating stub 30 forms a certain resonance (a certain frequency band), the adjustment circuit 64 can control a certain adjustment branch to be electrically connected to the parasitic stub 40, so that the parasitic stub 40 is electromagnetically coupled to the main radiating stub 30 and the electrical length of the parasitic stub 40 at this time is greater than or less than one-quarter of the wavelength of the wireless signal formed by the current resonance (current frequency band) of the main radiating stub 30.

[0105] In the electronic device 100 of this application embodiment, the main radiating branch 30 can form multiple resonances and support multiple frequency bands. Under the action of the adjustment circuit 64, the parasitic branch 40 can be electromagnetically coupled with the main radiating branch 30 that generates the corresponding resonance or the corresponding frequency band. The parasitic branch 40 can improve the radiation efficiency of the main radiating branch 30 under each resonance or frequency band. Thus, both the main radiating branch 30 and the parasitic branch 40 are reused. The electronic device 100 can improve radiation performance and also achieve miniaturization design.

[0106] Please refer to 27 and Figure 28 , Figure 27 This is a schematic diagram of the twelfth structure of the electronic device 100 provided in the embodiments of this application. Figure 28 This is a thirteenth structural schematic diagram of the electronic device 100 provided in the embodiments of this application. The first body 10 may further include a first middle frame 11, and the second body 20 may further include a second middle frame 21.

[0107] The first middle frame 11 and the second middle frame 21 can be made of conductive material and have a certain rigidity. The first middle frame 11 and the second middle frame 21 can provide support for electronic devices or electronic components in the electronic device 100.

[0108] It is understood that the first middle frame 11 may include the first side 12 and the second side 13 in the aforementioned embodiments, and the second middle frame 21 may include the third side 22 in the aforementioned embodiments. The main radiating branch 30 may be disposed on the first middle frame 11, and the main radiating branch 30 may be formed on the first middle frame 11, for example, formed on at least one of the first side 12 and the second side 13. The main radiating branch 30 may also be connected to the first middle frame 11, for example, connected to at least one of the first side 12 and the second side 13. The main radiating branch 30 may also be spaced apart from the first middle frame 11, and the projection of the main radiating branch 30 may be located on the first middle frame 11, for example, on at least one of the first side 12 and the second side 13. The parasitic branch 40 may be disposed on the second middle frame 21. For example, but not limited to, at least some of the parasitic branches 40 may be formed on or connected to the third side 22 of the second middle frame 21; or, the parasitic branch 40 may be spaced apart from the third side 22 and projected onto the third side 22.

[0109] It is understood that the first middle frame 11 and the second middle frame 21 can be grounded and form a grounding plane. One end of the main radiating branch 30, such as the second free end 31, can be spaced apart from the first middle frame 11, and the other end of the main radiating branch 30, such as the second grounding end 32, can be connected to the first middle frame 11 and grounded. The first free end 41 of the parasitic branch 40 can be spaced apart from the first middle frame 11, and the first grounding end 42 of the parasitic branch 40 can be spaced apart from the second middle frame 21.

[0110] In this embodiment, the first middle frame 11 and the second middle frame 21 form a grounding plane. The main radiating branch 30 and the parasitic branch 40 can be connected to the first middle frame 11 and the second middle frame 21 and grounded through the first middle frame 11 and the second middle frame 21. This design can ensure the connection stability of the main radiating branch 30 and the parasitic branch 40, and can also reduce the wiring when designing the grounding of the two.

[0111] Please refer to the following: Figure 29 and Figure 30 , Figure 29 This is a thirteenth structural diagram of the electronic device 100 provided in this application embodiment. Figure 30 This is a fourteenth structural schematic diagram of the electronic device 100 provided in this application embodiment. A first gap 101 can be formed on the first middle frame 11 to form a first metal branch 111 on the first middle frame 11. The main radiating branch 30 can include the first metal branch 111. One end of the first metal branch 111 connected to the first middle frame 11 can be the second grounding terminal 32 of the main radiating branch 30. The end of the first metal branch 111 not connected to other parts of the first middle frame 11 can be the second free end 31 of the main radiating branch 30. A second gap 102 can be formed on the second middle frame 21 to form a second metal branch 211 on the second middle frame 21. The parasitic branch 40 can include the second metal branch 211. One end of the second metal branch 211 connected to the second middle frame 21 can be the first grounding terminal 42 of the parasitic branch 40. The end of the second metal branch 211 not connected to other parts of the second middle frame 21 can be the first free end 41 of the parasitic branch 40.

[0112] It is understandable that the electronic device 100 may fill the space between the first gap 101 and the second gap 102 with non-conductive material to increase the structural strength of the first middle frame 11 and the second middle frame 21.

[0113] In the electronic device 100 of this application embodiment, the first middle frame 11 and the second middle frame 21 form a main radiating branch 30 and a parasitic branch 40 through a slit. The main radiating branch 30 and the parasitic branch 40 do not need to occupy additional space in the electronic device 100, and the electronic device 100 can achieve a miniaturized design.

[0114] Please refer to this again. Figures 27 to 30 The electronic device 100 may also include a flexible display screen 70, a circuit board 80, and a power supply 90.

[0115] The flexible display screen 70 can form the display surface of the electronic device 100 for displaying images, text, and other information. The flexible display screen 70 may include a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display screen. The flexible display screen 70 can be connected to the first body 10 and the second body 20, and can be folded along with the folding of the first body 10 and the second body 20.

[0116] For example, the first end of the flexible display screen 70 can be connected to the first body 10, and the second end of the flexible display screen 70 can be connected to the second body 20. When the first body 10 and the second body 20 are in the unfolded state, the first and second ends of the flexible display screen 70 can be on the same plane as the first body 10 and the second body 20 are unfolded. When the first body 10 and the second body 20 are in the overlapping state, the flexible display screen 70 can be folded as the first body 10 and the second body 20 are folded, so that the first and second ends of the flexible display screen 70 can be close to each other or completely close to each other and folded together. It is understood that in Figures 9 to 12 In the illustrated embodiment, the electronic device 100 may have a display screen mounted on one of the first body 10 and the second body 20. This display screen may be a flexible screen or a non-flexible screen. In this embodiment, the display screen may not change shape as the first body 10 and the second body 20 slide.

[0117] The circuit board 80 can be mounted on either the first body 10 or the second body 20, and can serve as the motherboard of the electronic device 100. The circuit board 80 can integrate a processor, and may also integrate one or more functional components such as a headphone jack, an accelerometer, a gyroscope, and a motor. The flexible display screen 70, feed source 61, matching circuit 62, control circuit 63, and adjustment circuit 64 can be located on the circuit board 80 for control by the processor on the circuit board 80.

[0118] The power supply 90 can be installed on either the first body 10 or the second body 20. Simultaneously, the power supply 90 can be electrically connected to the circuit board 80 to power the electronic device 100. The circuit board 80 may be equipped with a power management circuit. The power management circuit is used to distribute the voltage provided by the power supply 90 to the various electronic components in the electronic device 100.

[0119] It is understood that the above are merely exemplary examples of the electronic device 100. The electronic device 100 in this application embodiment may also include components such as a camera, a sensor, and a sound-to-electric conversion device. These components can be found in the descriptions in the related technologies, and will not be repeated here.

[0120] It should be understood that in the description of this application, terms such as "first" and "second" are used only to distinguish similar objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0121] The electronic devices provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electronic device, comprising: include: first ontology; The second body can be folded or slid relative to the first body so that at least a portion of the second body overlaps with the first body; A feed source is used to provide an excitation signal; A main radiating branch is disposed on the first body, and the main radiating branch is electrically connected to the feed source. The main radiating branch is used to support the first frequency band under the action of the excitation signal. and Parasitic branches are disposed on the second body; wherein... When at least a portion of the second body overlaps with the first body and the orientation of the free end of the parasitic branch is the same as the orientation of the free end of the main radiating branch, the parasitic branch couples with the main radiating branch and jointly supports the second frequency band, and the electrical length of the parasitic branch is less than one-quarter of the wavelength corresponding to the first frequency band; or, When at least a portion of the second body overlaps with the first body and the orientation of the free end of the parasitic branch is different from the orientation of the free end of the main radiating branch, the parasitic branch couples with the main radiating branch and jointly supports the second frequency band, and the electrical length of the parasitic branch is greater than one-quarter of the wavelength corresponding to the first frequency band.

2. The electronic device of claim 1, wherein, The first frequency band and the second frequency band at least partially overlap.

3. The electronic device of claim 1, wherein, The parasitic branch includes a first free end and a first grounded end disposed opposite to each other, the first grounded end being grounded; The main radiating branch includes a second free end and a second ground end arranged opposite to each other. The second ground end is grounded. When at least a portion of the second body overlaps with the first body, at least a portion of the first free end overlaps with the second free end.

4. The electronic device according to claim 1, characterized in that, The first body includes a first side and a second side that are bent and connected, and the second body includes a third side that is disposed opposite to the first side; The parasitic branch is located on the third side, and the main radiating branch is located on the first side. The free ends of the main radiating branch and the parasitic branch both extend in a direction away from the second side, so that the orientation of the free end of the parasitic branch is the same as the orientation of the free end of the main radiating branch.

5. The electronic device according to claim 1, characterized in that, The first body includes a first side and a second side that are bent and connected, and the second body includes a third side that is disposed opposite to the first side; The main radiating branch is disposed on the first side and the second side, and the parasitic branch is disposed on the third side. The free end of the main radiating branch extends away from the first side, and the free end of the parasitic branch extends away from the second side, so that the orientation of the free end of the parasitic branch is different from that of the free end of the main radiating branch.

6. The electronic device according to claim 1, characterized in that, The electrical length of the main radiating branch is equal to one-quarter of the wavelength corresponding to the first frequency band.

7. The electronic device according to claim 1, characterized in that, When the electrical length of the parasitic segment is greater than one-quarter of the wavelength corresponding to the first frequency band, the electrical length of the parasitic segment is also less than or equal to one-third of the wavelength corresponding to the first frequency band.

8. The electronic device according to any one of claims 1 to 7, characterized in that, Also includes: A matching circuit is connected in series between the feed and the main radiating stub. The matching circuit is used to match the impedance of the feed when transmitting the excitation signal, so that the main radiating stub supports the first frequency band.

9. The electronic device according to any one of claims 1 to 7, characterized in that, The main radiating branch is also used to support the third frequency band under the action of the excitation signal; the electronic device further includes: A control circuit, electrically connected to the parasitic branch, is configured to control the parasitic branch to not couple with the main radiating branch when the main radiating branch supports the third frequency band and at least part of the second body overlaps with the first body.

10. The electronic device according to any one of claims 1 to 7, characterized in that, The main radiating branch is also used to support the third frequency band under the action of the excitation signal; the electronic device further includes: An adjustment circuit, electrically connected to the parasitic stub, is used to adjust the electrical length of the parasitic stub so that it couples with the main radiating stub and jointly supports the fourth frequency band when the main radiating stub supports the third frequency band and at least partially overlaps the second body with the first body; wherein, When at least a portion of the second body overlaps with the first body and the orientation of the free end of the parasitic branch is the same as the orientation of the free end of the main radiating branch, the adjusted electrical length of the parasitic branch is less than one-quarter of the wavelength corresponding to the third frequency band; or, When at least a portion of the second body overlaps with the first body and the orientation of the free end of the parasitic branch is different from the orientation of the free end of the main radiating branch, the adjusted electrical length of the parasitic branch is greater than one-quarter of the wavelength corresponding to the third frequency band.

11. The electronic device according to any one of claims 1 to 7, characterized in that, The first body includes a first middle frame, on which a slit is provided to form a first metal branch, the main radiating branch including the first metal branch; and / or, The second body includes a second middle frame, and the second middle frame has a slit to form a second metal branch on the second middle frame, the parasitic branch including the second metal branch.

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