Electronic device

Abstract

The embodiment of the invention provides electronic equipment. The electronic equipment comprises a grounding plate, a radiation branch knot, a first feed source and a second feed source, the radiation branch knot comprises a first feeding point and a second feeding point. The first feed source is connected with the first feed point, the radiation branch knot and the grounding plate are adjacent and arranged at an interval, the radiation branch knot and the grounding plate form an asymmetric dipole antenna, and the asymmetric dipole antenna supports receiving and transmitting of electromagnetic wave signals of a first frequency band under excitation of the first feed source; and the first feed source excites the radiation branch knot through the first feed point to at least support receiving and transmitting of the electromagnetic wave signal of the second frequency band. The second feed source is connected with the second feeding point, and the second feed source excites the radiation branch knot through the second feeding point to support receiving and transmitting of electromagnetic wave signals of a third frequency band; wherein the first frequency band is lower than the second frequency band and the third frequency band. According to the invention, the requirement of multiple antenna frequency bands can be met in a limited space.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a communicable electronic device. Background Art

[0002] Currently, with the popularization of 5G communication technologies, people's communication experience is getting better and better, but the number of antennas is also increasing. With the popularization of full-screen, curved-screen, etc., the available clearance for antennas is getting less and less. Therefore, how to ensure the communication quality of antennas without increasing the volume of the electronic device has become a problem to be solved. Summary of the Invention

[0003] This application provides an electronic device to solve the above problems.

[0004] In a first aspect, an electronic device is provided, including a ground plane, radiation branches, a first feeder, and a second feeder. Among them, the radiation branches include a first feeding point and a second feeding point. The first feeder is connected to the first feeding point. Wherein, the radiation branches are adjacent to and spaced from the ground plane, and the radiation branches and the ground plane form an asymmetric dipole antenna. The asymmetric dipole antenna supports the transceiver of electromagnetic wave signals in a first frequency band under the excitation of the first feeder, and the first feeder also excites the radiation branches through the first feeding point to support at least the transceiver of electromagnetic wave signals in a second frequency band. The second feeder is connected to the second feeding point, and the second feeder excites the radiation branches through the second feeding point to support the transceiver of electromagnetic wave signals in a third frequency band; wherein, the first frequency band is lower than the second frequency band and the third frequency band.

[0005] In the electronic device of this application, the radiation branches can not only support the transceiver of electromagnetic wave signals in the second frequency band under the excitation of the first feeder, but also support the transceiver of electromagnetic wave signals in the third frequency band under the excitation of the second feeder, and can also form an asymmetric dipole antenna with the ground plane to support the transceiver of electromagnetic wave signals in the first frequency band under the excitation of the first feeder. Thus, at least three frequency bands can be supported by one radiation branch, and the requirements of multi-antenna frequency bands can be met within a limited space. In addition, since the first frequency band is lower than the second frequency band and the third frequency band, the antenna size requirements corresponding to the first frequency band are larger. In the structure of the asymmetric dipole antenna, since mainly one with a larger size radiates, in this application, the radiation branches and the ground plane form an asymmetric dipole antenna, and the size of the ground plane can mainly meet the requirement for a larger-sized radiator when supporting the lower-frequency first frequency band. Thus, the radiation branches can be shared with the higher-frequency second frequency band and third frequency band, and at least one radiation branch with a larger size can be saved, further reducing the space occupation. Description of the Drawings

[0006] To more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the accompanying drawings required for use in the embodiments of the present application or the background art will be described below.

[0007] Figure 1 It is a simple structural schematic diagram showing a part of the internal structure of an electronic device in an embodiment of the present application.

[0008] Figure 2 It is a schematic diagram of the current distribution of the ground plane of an electronic device in an embodiment of the present application.

[0009] Figure 3 It is another simple structural schematic diagram showing a part of the internal structure of an electronic device in an embodiment of the present application.

[0010] Figure 4 It is a schematic diagram of the internal structure of the first matching unit in some embodiments of the present application.

[0011] Figure 5 It is yet another simple structural schematic diagram showing a part of the internal structure of an electronic device in an embodiment of the present application.

[0012] Figure 6 It is a schematic diagram of the internal structure of the second matching unit in some embodiments of the present application.

[0013] Figure 7 It is a further structural schematic diagram showing a part of the internal structure of an electronic device in an embodiment of the present application.

[0014] Figure 8 It is still another simple structural schematic diagram showing a part of the internal structure of an electronic device in an embodiment of the present application.

[0015] Figure 9 It is a schematic diagram of the third matching unit in some embodiments of the present application.

[0016] Figure 10 It is a schematic diagram of a partial structure of an electronic device in some embodiments of the present application.

[0017] Figure 11 It is a schematic diagram of the current distribution of the radiation branches when the asymmetric dipole antenna of the electronic device in some embodiments of the present application operates in the first frequency band under the excitation of the first feed source.

[0018] Figure 12 It is a schematic diagram of the current distribution of the radiation branches when the first feed source of the electronic device in some embodiments of the present application excites the radiation branch 2 to operate in the intermediate frequency band through the first feeding point.

[0019] Figure 13 Schematic diagram of the current distribution of the radiation branch when the first feed source of the electronic device in some embodiments of the present application excites the radiation branch to operate in the ultra-high frequency band through the first feeding point.

[0020] Figure 14 Schematic diagram of the current distribution of the radiation branch when the second feed source of the electronic device in some embodiments of the present application excites the radiation branch to operate in the third frequency band through the second feeding point.

[0021] Figure 15 Schematic diagram of the return loss and isolation curve of the electronic device in some embodiments of the present application.

[0022] Figure 16 Schematic diagram of the radiation efficiency and total system efficiency curves of the electronic device in some embodiments of the present application.

[0023] Figure 17 Schematic diagram of another radiation efficiency and total system efficiency curves of the electronic device in some embodiments of the present application.

[0024] Figure 18 Schematic diagram of the back side of the electronic device in some embodiments of the present application. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "thickness", "width", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than implying or indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. The term "connection" in the present application includes meanings such as physical structural connection, electrical connection, direct connection or indirect connection, etc., and can be specifically determined according to the required connection situation. In the description of the embodiments of the present invention, the terms "first", "second", "third", "fourth", etc. are not specific, but are used to distinguish objects with the same name. In the case where there is a description in the specification, the objects with the same name referred to by the terms "first", "second", "third", "fourth", etc. can be the same object.

[0027] Please refer to Figure 1, is a simple structural schematic diagram showing a partial internal structure of an electronic device 100 in an embodiment of the present application. As Figure 1 shown, the electronic device 100 includes a ground plane 1, a radiation stub 2, a first feeder 3, and a second feeder 4. Among them, the radiation stub 2 includes a first feeding point F1 and a second feeding point F2. The first feeder 3 is connected to the first feeding point F1. Among them, the radiation stub 2 is adjacent to and spaced from the ground plane 1. The radiation stub 2 and the ground plane 1 form an asymmetric dipole antenna. The asymmetric dipole antenna supports the transceiver of electromagnetic wave signals in a first frequency band under the excitation of the first feeder 3. The first feeder 3 also excites the radiation stub 2 through the first feeding point F1 to support at least the transceiver of electromagnetic wave signals in a second frequency band. The second feeder 4 is connected to the second feeding point F2. The second feeder 4 excites the radiation stub 2 through the second feeding point F2 to support the transceiver of electromagnetic wave signals in a third frequency band; among them, the first frequency band is lower than the second frequency band and the third frequency band.

[0028] Therefore, in the present application, the radiation stub 2 can both support the transceiver of electromagnetic wave signals in the second frequency band under the excitation of the first feeder 3, and support the transceiver of electromagnetic wave signals in the third frequency band under the excitation of the second feeder 4, and can also form an asymmetric dipole antenna with the ground plane 1 to support the transceiver of electromagnetic wave signals in the first frequency band under the excitation of the first feeder 3. Thus, at least three frequency bands can be supported by one radiation stub, and the demand for multi-antenna frequency bands can be met within a limited space. In addition, since the first frequency band is lower than the second frequency band and the third frequency band, the antenna size requirement corresponding to the first frequency band is larger. In the structure of the asymmetric dipole antenna, since the radiation is mainly carried out by a larger-sized branch, in the present application, the radiation stub 2 and the ground plane 1 form an asymmetric dipole antenna, and the size of the ground plane 1 can mainly meet the requirement for a larger-sized radiator when supporting the lower-frequency first frequency band, so that the radiation stub can be shared with the higher-frequency second frequency band and third frequency band, and at least one radiation stub with a larger size can be omitted, further reducing the space occupation.

[0029] Among them, in the present application, the radiation stub 2 and the ground plane 1 form an asymmetric dipole antenna because the size of the radiation stub 2 is smaller than the size of the ground plane 1, so that the radiation stub 2 and the ground plane 1 can form an asymmetric dipole antenna. Further, the asymmetric dipole antenna in the present application means that the sizes of the two parts forming the asymmetric dipole antenna are different, that is, the sizes of the radiation stub 2 and the ground plane 1 are different, and specifically, the size of the radiation stub 2 is smaller than the size of the ground plane 1.

[0030] In some embodiments, the first frequency band is lower than the second frequency band and the third frequency band, which may mean that the maximum value of the frequency range corresponding to the first frequency band is less than the minimum values of the frequency ranges corresponding to the second frequency band and the third frequency band.

[0031] Wherein, in the present application, the radiation stub 2 is adjacent to and spaced from the ground plane 1 to form an asymmetric dipole antenna with the ground plane 1, so that the radiation stub 2 is coupled to the ground plane 1. Thus, in addition to the radiation stub 2 being excited by the first feed source 3 and the second feed source 4, the first feed source 3 can also couple and excite the ground plane 1 through the radiation stub 2, so as to support the transceiver of electromagnetic wave signals in the first frequency band. That is, in some embodiments, the asymmetric dipole antenna supports the transceiver of electromagnetic wave signals in the first frequency band under the excitation of the first feed source 3, which may mean that: the radiation stub 2 is excited by the first feed source 3, and then the first feed source 3 couples and excites the ground plane 1 through the radiation stub 2, so as to support the transceiver of electromagnetic wave signals in the first frequency band.

[0032] Furthermore, for the asymmetric dipole antenna, the radiation stub 2 mainly plays a role of feeding and exciting, that is, it is equivalent to a radiation driving device. Thus, the first feed source 3 can couple and excite the ground plane 1 through the radiation stub 2, so as to support the transceiver of electromagnetic wave signals in the first frequency band.

[0033] Wherein, in the present application, the radiation stub 2 being adjacent to and spaced from the ground plane 1 means that the radiation stub 2 is spaced from the ground plane 1, and the spacing distance between the radiation stub 2 and the ground plane 1 can satisfy any spacing distance required for the coupling between the radiation stub 2 and the ground plane 1. For example, the spacing distance can be less than 2 cm, etc.

[0034] In some embodiments, the radiation stub 2 includes opposite first open end O1 and second open end O2. The first feeding point F1 is set at a position between the first open end O1 and the second open end O2, and the second feeding point F2 is set at the first open end O1.

[0035] Thus, by setting the first feeding point F1 at a position between the first open end O1 and the second open end O2, and setting the second feeding point F2 at the first open end O1, different modes of the radiation stub 2 can be excited under the excitation of the first feed source 3 and the second feed source 4, so that the radiation stub 2 can support the transceiver of electromagnetic wave signals in different frequency bands such as the second frequency band and the third frequency band, and can also couple and excite the ground plane 1.

[0036] Among them, the setting of the second feeding point F2 at the first open end O1 does not merely mean that the second feeding point F2 is exactly set at the end where the first open end O1 is located, but also includes the case where the second feeding point F2 is set close to the first open end O1. For example, it also includes the case where the distance between the second feeding point F2 and the first open end O1 is less than a preset distance, such as 5 millimeters.

[0037] Among them, in some embodiments, the first feeding point F1 and the second feeding point F2 can also be set at other suitable positions of the radiation branch 2. For example, the second feeding point F2 can also be set at a non-end position. For example, the second feeding point F2 can also coincide with the first feeding point F1 and be set at a position between the first open end O1 and the second open end O2.

[0038] In some embodiments, the radiation branch 2 and the ground plane 1 are coupled to form a 1 / 2 wavelength asymmetric dipole antenna, and the wavelength is the wavelength corresponding to the first frequency band. The first feed source 3 couples and excites the ground plane 1 to work in the 1 / 2 wavelength resonance mode through the radiation branch 2. That is, in some embodiments, the size of the ground plane 1 is relatively large, and the ground plane 1 mainly performs radiation. The ground plane 1 works in the 1 / 2 wavelength resonance mode under the excitation of the radiation branch 2 to support the transceiver of electromagnetic wave signals in the first frequency band.

[0039] In some embodiments, the equivalent electrical length of the ground plane 1 is nλ1 + λ1 / 2, where λ1 is the wavelength corresponding to the first frequency band, and n is 0 or a positive integer.

[0040] That is, in some embodiments, the size of the ground plane 1 is relatively large, and the ground plane 1 mainly performs radiation. Therefore, the size of the asymmetric dipole antenna is mainly the size of the ground plane 1. Therefore, when the equivalent electrical length of the ground plane 1 is nλ1 + λ1 / 2, λ1 is the wavelength corresponding to the second frequency band, and n is 0 or a positive integer, the asymmetric dipole antenna can work in the 1 / 2 wavelength resonance mode. In addition, in this application, for the asymmetric dipole antenna, the radiation branch 2 mainly plays an exciting role and participates less in radiation. Therefore, the size can be relatively small. For example, as mentioned above, the radiation branch for supporting higher frequency second frequency band and other frequency bands can be shared, that is, the radiation branch 2, and the size of the radiation branch 2 is smaller than that of the radiation branch that normally works in the 1 / 4 wavelength resonance mode and supports the first frequency band. It can reduce one radiation branch, and specifically reduce the larger-sized branch that originally supports the first frequency band, which can effectively reduce the occupation of the space of the electronic device 100.

[0041] Among them, in the present application, the wavelength corresponding to a certain frequency band may specifically be the wavelength corresponding to the center frequency or the resonance frequency of the frequency band. That is, if the center frequency or the resonance frequency of the frequency band is f0, the wavelength corresponding to the frequency band may be C / f0, where C is the propagation speed of the electromagnetic wave signal, equal to the speed of light.

[0042] Please refer to Figure 2 , which is a schematic diagram of the current distribution of the ground plane of the electronic device 100 in an embodiment of the present application. Among them, as Figures 1 - 2 shown, the ground plane 1 is rectangular, including two opposite short sides B1 and two opposite long sides B2. The radiation stub 2 is arranged close to one short side B1 of the ground plane 1. The first feeder 3 couples and excites the ground plane 1 through the radiation stub 2 to generate a current i1 conducted along the long side B2, and operates in the 1 / 2 wavelength resonance mode. The equivalent electrical length of the ground plane 1 is the equivalent electrical length of the long side B2 of the ground plane 1.

[0043] That is, in some embodiments, the radiation stub 2 is arranged close to one short side B1 of the ground plane 1, and a capacitive coupling is formed between the radiation stub 2 and the short side B1 of the ground plane 1. The first feeder 3 can excite the ground plane 1 in the way of capacitive coupling element (CCE) excitation through the radiation stub 2, and excite the ground plane 1 to generate an induced current i1 from the short side B1 close to the radiation stub 2 to the other short side B1, that is, excite the ground plane 1 to generate an induced current i1 conducted along the long side B2. Among them, the length of the conduction of the induced current i1 can be regarded as the equivalent electrical length. Since it is mainly conducted along the long side B2, the equivalent electrical length of the ground plane 1 is the equivalent electrical length of the long side B2 of the ground plane 1.

[0044] Therefore, in some embodiments, by setting the length of the long side B2 of the ground plane 1 to be approximately equal to nλ1 + λ1 / 2, where λ1 is the wavelength corresponding to the first frequency band and n is 0 or a positive integer, the ground plane 1 can operate in the 1 / 2 wavelength resonance mode under the excitation of the first feeder 3, and support the transceiver of the electromagnetic wave signal of the first frequency band.

[0045] Among them, the equivalent electrical length of the ground plane 1 may be the equivalent electrical length of the ground plane 1 itself. For example, it may be approximately equal to the physical length of the long side B2 of the ground plane 1.

[0046] Among them, in some embodiments, the induced current i1 conducted along the long side B2 generated by the excitation of the ground plane 1 is the characteristic mode current, and specifically is the longitudinal characteristic mode current conducted along the long side B2.

[0047] AsFigure 2 As shown, in some embodiments, the orthographic projection of the first feeding point F1 on the ground plane 1 is located in the current weak point region Q1 of the characteristic mode current of the ground plane 1, where the current weak point region Q1 is located in a region centered at the intersection point O of the extension lines of the adjacent short side B1 and long side B2, with a radius R equal to 1 / 16 of the wavelength of the first frequency band. Specifically, the adjacent short side B1 and long side B2 can be a short side B1 close to the radiation branch 2 and its adjacent long side B2.

[0048] In some embodiments, the adjacent short side B1 and long side B2 are connected by an arc transition. Therefore, Figure 1 Taking the connection between the short side B1 and the long side B2 as an example for illustration. The center O is the intersection point of the extension line of the short side B1 and the extension line of the long side B2, and the center O is located outside the short side B1 and the long side B2. In some embodiments, when the adjacent short side B1 and long side B2 are directly vertically connected, that is, the connection between the adjacent short side B1 and long side B2 is a right angle, the intersection point of the extension line of the short side B1 and the extension line of the long side B2 is the intersection point of the short side B1 and the long side B2, that is, the center O will be located on the short side B1 and the long side B2.

[0049] Among them, the orthographic projection of the first feeding point F1 on the ground plane 1 is located in the current weak point region Q1 and is located in a circular region centered at the intersection point with a radius equal to 1 / 16 of the wavelength of the target frequency band. It can be seen that the current weak point region Q1 where the orthographic projection of the first feeding point F1 on the ground plane 1 is located is a sector or a sector-like shape.

[0050] When the current weak point region Q1 is selected to be in a region centered at the intersection point O of the extension lines of the adjacent short side B1 and long side B2, with a radius R equal to 1 / 16 of the wavelength of the second frequency band, since the current in this region is relatively weak, by setting the positions of the radiation branch 2 and the first feeding point F1 to satisfy that the orthographic projection of the first feeding point F1 on the ground plane 1 is set in the current weak point region Q1, it is possible to further better excite the excitation current in the same direction as the extension direction of the long side B2, so that the asymmetric dipole antenna has a higher radiation efficiency in the first frequency band.

[0051] In some embodiments, as described above, for the asymmetric dipole antenna, the radiation branch 2 mainly functions as a feeding excitation, that is, the radiation branch 2 is equivalent to a radiation driving device. Thus, the first feed source 3 can couple and excite the ground plane 1 through the radiation branch 2 to support the transceiver of electromagnetic wave signals in the first frequency band. Among them, the equivalent electrical length of the radiation branch 2 satisfies the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode. That is, in some embodiments, the equivalent electrical length of the radiation branch 2 satisfies the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode, so as to be able to act as a radiation driving device to couple and excite the ground plane 1 to support the transceiver of electromagnetic wave signals in the first frequency band.

[0052] In some embodiments, the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode can be a value between 1 / 16 and 1 / 8 of the wavelength corresponding to the first frequency band. That is, when the equivalent electrical length of the radiation branch 2 is between 1 / 16 and 1 / 8 of the wavelength corresponding to the first frequency band, the ground plane can be coupled and excited to operate in the 1 / 2 wavelength resonance mode.

[0053] In some embodiments, the equivalent electrical length of the radiation branch 2 in the present application can be its own equivalent electrical length. For example, it can be approximately equal to the length of the radiation branch 2. Among them, as Figures 1 - 2 shown in the figures, the radiation branch 2 is bar-shaped, and the equivalent electrical length of the radiation branch 2 can be its own equivalent electrical length and is equal to the length of the radiation branch 2.

[0054] Among them, the length of the radiation branch 2 can be the length of the longest side of the radiation branch 2, that is, the dimension along the extension direction of the radiation branch 2 between the first open end O1 and the second open end O2 of the radiation branch 2. For example, as Figure 1 and Figure 2 shown, the radiation branch 2 can be specifically a bent bar, such as approximately L-shaped, and the longest side of the radiation branch 2 is the bent side extending along the bending direction.

[0055] Among them, the size of the aforementioned radiation branch 2 mainly refers to the length of the radiation branch 2, and the size of the aforementioned ground plane 1 mainly refers to the length of the long side B2 of the ground plane 1. Therefore, the size of the aforementioned radiation branch 2 being smaller than the size of the ground plane 1 mainly means that the length of the radiation branch 2 is smaller than the length of the long side B2 of the ground plane 1.

[0056] In some embodiments, when the radiation stub 2 is further connected with a matching unit for realizing matching adjustment, the equivalent electrical length of the radiation stub 2 may also be the equivalent electrical length equivalent under the cooperation of the connected matching unit.

[0057] Please refer to Figure 3 , which is another schematic diagram of a simple internal structure showing a part of the electronic device 100 in an embodiment of the present application.

[0058] Among them, as Figure 3 shown, the electronic device 100 further includes a first matching unit M1, the first matching unit M1 is connected between the first feed source 3 and the first feeding point F1, and the equivalent electrical length of the radiation stub 2 under the cooperation of the first matching unit M1 satisfies the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode.

[0059] That is, in some embodiments, the radiation stub 2 may have an equivalent electrical length under the cooperation of the first matching unit M1 that satisfies the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode. Therefore, the length of the radiation stub 2 can be designed to meet the requirements of other frequency bands or does not need to be exactly equal to the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode, but the equivalent electrical length of the radiation stub 2 can be made to satisfy the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode through the first matching unit M1.

[0060] Among them, the first matching unit M1 may include a capacitor and / or an inductor.

[0061] Please refer to Figure 4 , which is a schematic diagram of the internal structure of the first matching unit M1 in some embodiments of the present application.

[0062] The first matching unit M1 includes a first inductor L1 connected between the first feed source 3 and the first feeding point F1, and a second inductor L2 connected between one end of the first inductor L1 connected to the first feed source 3 and the ground.

[0063] That is, in some embodiments, the first matching unit M1 may include a first inductor L1 connected between the first feed source 3 and the first feeding point F1, and a second inductor L2 in a parallel relationship with the first inductor L1, so as to realize that the equivalent electrical length of the radiation stub 2 under the cooperation of the first matching unit M1 satisfies the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode.

[0064] Among them, Figure 4Merely as an example, the matching unit M1 may further include other structures. For example, it may include an inductor and a capacitor in parallel, or an inductor and a capacitor in series, or multiple inductors in series, or a structure in which an inductor and a capacitor are in parallel and then in series with an inductor or a capacitor, or a structure in which a series branch of a capacitor and an inductor is in parallel with a capacitor or / inductor, and so on.

[0065] In some embodiments, the first frequency band is a low-frequency band. That is, the radiation stub 2 and the ground plane 1 form an asymmetric dipole antenna, and the first frequency band supported by the asymmetric dipole antenna under the excitation of the first feed 3 is specifically a low-frequency band. Since the antenna size required for the low-frequency band is the largest, and in this application, as described above, the asymmetric dipole antenna mainly radiates through the ground plane 1. Therefore, the size of the asymmetric dipole antenna is mainly the size of the ground plane 1. For the asymmetric dipole antenna, the radiation stub 2 mainly plays an exciting role and participates less in radiation. Therefore, its size can be smaller. Therefore, by using the asymmetric dipole antenna to support the low-frequency band, it can be achieved with a very small radiation stub 2, which can significantly reduce the size of the radiation stub and effectively reduce the occupation of the space of the electronic device 100.

[0066] In some embodiments, the first feed 3 also excites the radiation stub 2 to support the transceiver of electromagnetic wave signals in the fourth frequency band through the first feeding point F1, and the operating mode of the fourth frequency band is different from that of the second frequency band.

[0067] That is, in some embodiments, the first feed 3 can not only excite the radiation stub 2 to support the transceiver of electromagnetic wave signals in the second frequency band through the first feeding point F1, but also support the transceiver of electromagnetic wave signals in the fourth frequency band. Among them, since the operating mode of the fourth frequency band is different from that of the second frequency band, the first feed 3 can support the transceiver of electromagnetic wave signals in different frequency bands by exciting the radiation stub 2 to work in different operating modes.

[0068] In some embodiments, the second frequency band is one of the medium-frequency band and the ultra-high-frequency band, and the fourth frequency band is the other of the medium-frequency band and the ultra-high-frequency band.

[0069] That is, in some embodiments, the first feed 3 excites the radiation stub 2 to work in different operating modes through the first feeding point F1, so as to support the transceiver of electromagnetic wave signals in different frequency bands, and specifically can support the transceiver of electromagnetic wave signals in different frequency bands such as the medium-frequency band and the ultra-high-frequency band.

[0070] In some embodiments, the intermediate frequency band may be a frequency band such as the B3 band, and the ultra-high frequency band may be frequency bands such as the 5G N78 band and the 5G N79 band.

[0071] Obviously, in some embodiments, the second frequency band and the fourth frequency band may also be two other suitable frequency bands. For example, they may also be the intermediate frequency band and the high frequency band. Among them, the high frequency band may be a frequency band such as the B41 band.

[0072] In some embodiments, the first feed 3 excites the radiation stub 2 to operate in a 3 / 4 wavelength resonance mode through the first feeding point F1 to support the transceiver of electromagnetic wave signals in the ultra-high frequency band.

[0073] That is, in some embodiments, the equivalent electrical length of the radiation stub 2 may be 3 / 4 of the wavelength corresponding to the ultra-high frequency band, and the first feed 3 excites the radiation stub 2 to operate in a 3 / 4 wavelength resonance mode through the first feeding point F1 to support the transceiver of electromagnetic wave signals in the ultra-high frequency band.

[0074] Please refer to Figure 5 , which is another simple structural schematic diagram showing a part of the internal structure of the electronic device 100 in an embodiment of the present application.

[0075] Among them, as Figure 5 shown, the electronic device 100 further includes a second matching unit M2. The second matching unit M2 is connected between the first feed 3 and the first feeding point F1. The equivalent electrical length of the radiation stub 2 with the cooperation of the second matching unit M2 is 3*λ2 / 4, where λ2 is the wavelength corresponding to the ultra-high frequency band.

[0076] That is, in some embodiments, the equivalent electrical length of the radiation stub 2 can be 3*λ2 / 4 with the cooperation of the second matching unit M2 to support the transceiver of electromagnetic wave signals in the ultra-high frequency band. As mentioned above, the radiation stub 2 can also have an equivalent electrical length that satisfies the electrical length required for coupling and exciting the ground plane to operate in a 1 / 2 wavelength resonance mode under the matching of the first matching unit M1. Therefore, through the first matching unit M1 and the second matching unit M2, the radiation stub 2 can have an equivalent electrical length that satisfies the electrical length required for coupling and exciting the ground plane to operate in a 1 / 2 wavelength resonance mode under the cooperation of the first matching unit M1, and can also have an equivalent electrical length of 3*λ2 / 4 with the cooperation of the second matching unit M2 to support the transceiver of electromagnetic wave signals in the ultra-high frequency band.

[0077] Among them, in some embodiments, the equivalent electrical length of the radiation stub 2 itself can also satisfy the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode. The first matching unit M1 can be omitted, and the equivalent electrical length of the radiation stub 2 in cooperation with the second matching unit M2 is 3*λ2 / 4, so as to support the transceiver of electromagnetic wave signals in the ultra-high frequency band. Or, in some embodiments, the equivalent electrical length of the radiation stub 2 itself is 3*λ2 / 4, so as to support the transceiver of electromagnetic wave signals in the ultra-high frequency band. The second matching unit M2 can be omitted, and the equivalent electrical length of the radiation stub 2 in cooperation with the first matching unit M1 can satisfy the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode.

[0078] Or, in some embodiments, the equivalent electrical length of the radiation stub 2 itself can satisfy the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode, and also satisfy 3*λ2 / 4, so as to support the transceiver of electromagnetic wave signals in the ultra-high frequency band. Both the first matching unit M1 and the second matching unit M2 can be omitted. Among them, as mentioned above, the electrical length required for the radiation stub 2 to satisfy the coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode can be a value between 1 / 16 and 1 / 8 of the wavelength corresponding to the first frequency band. The first frequency band is a low frequency. Therefore, when the equivalent electrical length of the radiation stub 2 is designed to be 3*λ2 / 4, it generally will also be a value between 1 / 16 and 1 / 8 of the wavelength corresponding to the first frequency band.

[0079] Among them, as Figure 5 shown, when the electronic device 100 includes both the first matching unit M1 and the second matching unit M2 at the same time, the second matching unit M2 and the first matching unit M1 can be connected in series between the first feed source 3 and the first feeding point F1 in sequence. That is, as Figure 5 shown, the second matching unit M2 can be connected between the first feed source 3 and the first matching unit M1, and the first matching unit M1 is connected between the second matching unit M2 and the first feeding point F1. Obviously, in some embodiments, the second matching unit M2 and the first matching unit M1 can also be connected in series between the first feed source 3 and the first feeding point F1 in sequence. That is, the first matching unit M1 can be connected between the first feed source 3 and the second matching unit M2, and the second matching unit M2 is connected between the first matching unit M1 and the first feeding point F1.

[0080] Please refer to Figure 6 , which is a schematic internal structure diagram of the second matching unit M2 in some embodiments of the present application.

[0081] As Figure 6 shown, the second matching unit M2 includes a third inductor L3 connected between the first feeder 3 and the first feeding point F1, and a first capacitor C1 connected between one end of the third inductor L3 connected to the first feeding point F1 and the ground.

[0082] That is, in some embodiments, the second matching unit M2 may include a third inductor L3 connected between the first feeder 3 and the first feeding point F1, and a first capacitor C1 in parallel with the third inductor L3, so as to achieve an equivalent electrical length of 3*λ2 / 4 of the radiation stub 2 with the cooperation of the second matching unit M2, and support the transceiver of electromagnetic wave signals in the ultra-high frequency band.

[0083] Among them, Figure 6 merely as an example, the second matching unit M2 may also include other structures, such as including a parallel inductor and capacitor, or a series inductor and capacitor, or a structure in which an inductor and a capacitor are in parallel and then in series with an inductor or capacitor, or may also be a structure in which a series branch of a series capacitor and inductor is in parallel with a capacitor or / inductor, and so on.

[0084] Please refer to Figure 7 , which is a further structural schematic diagram showing a partial internal structure of the electronic device 100 in an embodiment of the present application.

[0085] Among them, Figure 7 the specific structures of the first matching unit M1 and the second matching unit M2 are shown at the same time. Among them, as described above, the connection of the present application includes an indirect connection. When the electronic device 100 includes both the first matching unit M1 and the second matching unit M2, and the second matching unit M2 and the first matching unit M1 can be sequentially connected in series between the first feeder 3 and the first feeding point F1, the first inductor L1 included in the first matching unit M1 is specifically connected between the second matching unit M2 and the first feeding point F1, and the second inductor L2 is specifically connected between one end of the first inductor L1 connected to the second matching unit M2 and the ground. Correspondingly, the third inductor L3 of the second matching unit M2 is specifically connected between the first feeder 3 and the first matching unit M2, and the first capacitor C1 is connected between one end of the second inductor L2 connected to the first matching unit M2 and the ground.

[0086] Among them, as Figure 7As shown, in terms of the specific circuit structure, the first inductor L1 of the first matching unit M1 and the third inductor L3 of the second matching unit M2 are connected in series between the first feed source 3 and the first feeding point F1, while the second inductor L2 of the first matching unit M1 and the first capacitor C1 of the second matching unit M2 are connected in parallel between the connection node of the first inductor L1 and the third inductor L3 and the ground.

[0087] Among them, the first matching unit M1 and the second matching unit M2 can be two independent matching units, or can be integrated into an integral matching unit. For example, it can also be an integral matching unit that simultaneously includes Figure 6 the specific structures of the first matching unit M1 and the second matching unit M2 shown in

[0088] In some embodiments, the equivalent electrical length of the branch portion Z1 between the first feeding point F1 of the radiation branch 2 and the second open end O2 is λ3 / 4, where λ3 is the wavelength corresponding to the intermediate frequency band. The first feed source 3 excites the radiation branch 2 to work in the 1 / 4 wavelength resonance mode through the first feeding point F1 to support the transceiver of electromagnetic wave signals in the intermediate frequency band.

[0089] As mentioned above, in some embodiments, the second frequency band is one of the intermediate frequency band and the ultra-high frequency band, and the fourth frequency band is the other of the intermediate frequency band and the ultra-high frequency band. For the realization of the intermediate frequency band, specifically, the equivalent electrical length of the branch portion Z1 between the first feeding point F1 of the radiation branch 2 and the second open end O2 is λ3 / 4, where λ3 is the wavelength corresponding to the intermediate frequency band. The first feed source 3 excites the radiation branch 2 to work in the 1 / 4 wavelength resonance mode through the first feeding point F1 to support the transceiver of electromagnetic wave signals in the intermediate frequency band.

[0090] In some embodiments, the position of the first feeding point F1 of the radiation stub 2 can satisfy that the equivalent electrical length of the stub portion Z1 between the first feeding point F1 and the second open end O2 itself is λ3 / 4. Therefore, the first feeder 3 excites the stub portion Z1 of the radiation stub 2 through the first feeding point F1 to operate in a 1 / 4-wavelength resonance mode to support the transceiver of electromagnetic wave signals in the intermediate frequency band. That is, the first feeder 3 exciting the radiation stub 2 to operate in a 1 / 4-wavelength resonance mode through the first feeding point F1 can refer to the first feeder 3 exciting the stub portion Z1 of the radiation stub 2 to operate in a 1 / 4-wavelength resonance mode through the first feeding point F1. Therefore, in some embodiments, since the equivalent electrical length of the stub portion Z1 between the first feeding point F1 and the second open end O2 itself can be made λ3 / 4 by setting the position of the first feeding point F1 of the radiation stub 2, and the transceiver of electromagnetic wave signals in the intermediate frequency band is supported, thus, there is no need to add a matching unit for the intermediate frequency band.

[0091] Therefore, in the present application, since the operating mode of the fourth frequency band is different from that of the second frequency band, therefore, the first feeder 3 exciting the radiation stub 2 through the first feeding point F1 can support the transceiver of electromagnetic wave signals in the second frequency band and the fourth frequency band.

[0092] Among them, in some embodiments, the first feeder 3 can be used to output a plurality of feeding signals, and the plurality of feeding signals can include feeding signals corresponding to the low frequency band, the intermediate frequency band, and the ultra-high frequency band respectively. Among them, the first feeder 3 can be a feeding signal source obtained by mixing the plurality of feeding signals by a radio frequency front-end circuit (not shown in the figure) through a combiner (not shown in the figure). Thus, the radiation stub 2 can be excited to operate in the corresponding intermediate frequency band and ultra-high frequency band, and the ground plane 1 can be excited to operate in the corresponding low frequency band through the radiation stub 2 by coupling.

[0093] In some embodiments, the second feeder 4 excites the radiation stub 2 to operate in a 1 / 2-wavelength resonance mode through the second feeding point F2 to support the transceiver of electromagnetic wave signals in the third frequency band.

[0094] That is, in some embodiments, the second feed source 4 supports the transceiver of electromagnetic wave signals in the third frequency band by exciting the radiation branch 2 to operate in a 1 / 2 wavelength resonance mode through the second feeding point F2. Therefore, in some embodiments, the operating mode in which the second feed source 4 excites the radiation branch 2 to operate through the second feeding point F2 is different from the operating modes in which the first feed source 3 excites the radiation branch 2 to operate in the second frequency band and the fourth frequency band through the first feeding point F1. Thus, the radiation branch 2 can be made to operate in multiple different operating modes to support the transceiver of electromagnetic wave signals in different frequency bands.

[0095] Please refer to Figure 8 , which is a further simple structural schematic diagram showing a part of the internal structure of the electronic device 100 in an embodiment of the present application.

[0096] In some embodiments, as Figure 8 shown, the electronic device 100 further includes a third matching unit M3, and the third matching unit M3 is connected between the second feed source 4 and the second feeding point F2. The equivalent electrical length of the radiation branch 2 with the cooperation of the third matching unit M3 is λ4 / 2, where λ4 is the wavelength corresponding to the third frequency band.

[0097] That is, in some embodiments, the electronic device 100 further includes a third matching unit M3 connected between the second feed source 4 and the second feeding point F2. The equivalent electrical length of the radiation branch 2 with the cooperation of the third matching unit M3 is λ4 / 2, so that the second feed source 4 can support the transceiver of electromagnetic wave signals in the third frequency band by exciting the radiation branch 2 to operate in a 1 / 2 wavelength resonance mode through the second feeding point F2.

[0098] In some embodiments, the third matching unit M3 is further configured to implement a band-pass filtering function to filter out electromagnetic wave signals other than the electromagnetic wave signals in the third frequency band. That is, the third matching unit M1 is further configured to allow the electromagnetic wave signals in the third frequency band to pass through while blocking the electromagnetic wave signals in other frequency bands, for example, to avoid the passage of the electromagnetic wave signals in the second frequency band or the fourth frequency band, thereby avoiding interference between the electromagnetic wave signals in the third frequency band and the electromagnetic wave signals in the second frequency band or the fourth frequency band.

[0099] Among them, in some other embodiments, when the equivalent electrical length of the radiation branch 2 itself is λ4 / 2, the third matching unit M3 can also be omitted.

[0100] Among them, the third matching unit M3 may include several capacitors and / or inductors to achieve corresponding matching adjustment.

[0101] Please refer to Figure 9, which is a schematic diagram of the third matching unit M3 in some embodiments of the present application. As Figure 9 shown, the third matching unit M1 includes a matching part M31 and a filtering part M32. The matching part M31 and the filtering part M32 are sequentially connected between the second feeder 4 and the second feeding point F2. The matching part M31 includes a second capacitor C2 and a third capacitor C3. The second capacitor C2 is connected between the second feeder 4 and the filtering part M32. The third capacitor C3 is connected between one end of the second capacitor C2 connected to the filtering part M32 and the ground. The filtering part M32 includes a fourth inductor L4 and a fourth capacitor C4 connected in series between the second feeding point F2 and the ground.

[0102] Thus, the third matching unit M3 includes the above-mentioned matching part M31 and the filtering part M32, which can make the equivalent electrical length of the radiation stub 2 under the cooperation of the third matching unit M3 be λ4 / 2, and can realize the band-pass filtering function to filter out the electromagnetic wave signals other than the electromagnetic wave signals in the third frequency band. Thus, when the radiation stub 2 supports the transceiver of electromagnetic wave signals in multiple frequency bands, interference between them can be avoided.

[0103] Among them, Figure 9 is just an example. The third matching unit M3 may also include other structures. For example, it may include a parallel inductor and capacitor, or a series inductor and capacitor, or a structure in which an inductor and a capacitor are connected in parallel and then connected in series with an inductor or capacitor, or it may also be a structure in which a series branch of a series-connected capacitor and inductor is connected in parallel with a capacitor or / inductor, and so on.

[0104] In some embodiments, the third frequency band is the WiFi 5G frequency band. Obviously, in other embodiments, the third frequency band may also be other frequency bands. For example, it may also be the 5G N79 and other frequency bands.

[0105] Among them, the foregoing Figure 8 The electronic device 100 in is schematically shown by taking it as an example that it simultaneously includes the first matching unit M1, the second matching unit M2, and the third matching unit M3. Among them, for the specific structures of the first matching unit M1, the second matching unit M2, and the third matching unit M3, reference can be made to the relevant structure introductions of the foregoing respective matching units. Among them, in some other embodiments, the electronic device 100 may also only include some of the first matching unit M1, the second matching unit M2, and the third matching unit M3, or may not include any matching unit.

[0106] Among them, the foregoing Figures 1 - 3 , Figure 5 and Figures 7 - 8The above figure may be a schematic diagram viewed from the back side of the electronic device 100 , that is, a schematic diagram viewed from the side of the display screen facing away from the electronic device 100 .

[0107] Among them, Figures 1 - 3 , Figure 5 as well as Figures 7 - 8 As shown in the figure, the electronic device 100 includes two opposite short side ends D11 and two opposite long side ends D12, and the radiating branch 2 includes a first radiating sub-branch 21 and a second radiating sub-branch 22 connected to each other, and the first radiating sub-branch 21 and the second radiating sub-branch 22 are respectively arranged at an adjacent short side end D11 and a long side end D12 of the electronic device 100.

[0108] That is, in some embodiments, the radiating branch 2 is a bent structure, the first radiating sub-branch 21 and the second radiating sub-branch 22 are connected at an angle to form the radiating branch 2, and the radiating branch 2 is arranged at the vertex where the short side end D11 and the long side end D12 of the electronic device 100 are connected, so as to leave space for other radiating branches. Among them, the angle between the first radiating sub-branch 21 and the second radiating sub-branch 22 can be 0° to 180°, that is, greater than 0° and less than 180°. In some embodiments, Figures 1 - 3 , Figure 5 as well as Figures 7 - 8 As shown in the above figures, the angle may be approximately 90°.

[0109] Among them, Figures 1 - 3 , Figure 5 as well as Figures 7 - 8 As shown in the figure, the adjacent short side ends D11 and long side ends D12 of the electronic device 100 can be connected in a circular arc transition, and the first radiation sub-branch 21 and the second radiation sub-branch 22 can also be adaptively connected in a circular arc transition. When the first radiation sub-branch 21 and the second radiation sub-branch 22 are connected in a circular arc transition, the angle between the first radiation sub-branch 21 and the second radiation sub-branch 22 can be the angle between the extension lines of the first radiation sub-branch 21 and the second radiation sub-branch 22.

[0110] Among them, Figures 1 - 3 , Figure 5 as well as Figures 7 - 8 As shown in the figure, the first open end O1 of the radiation branch 2 is located at the short side end D11 of the electronic device 100, and the second open end O2 is located at the long side end D12 of the electronic device 100. Obviously, in some embodiments, the first open end O1 of the radiation branch 2 may also be located at the long side end D12 of the electronic device 100, and the second open end O2 is located at the short side end D11 of the electronic device 100.

[0111] In some embodiments, as Figures 1 - 3 , Figure 5 and Figures 7 - 8 shown in the figures such as, the short side ends D11 and long side ends D12 of the electronic device 100 are respectively parallel and close to the short side end B1 and long side end B2 of the ground plane 1. Therefore, the radiation stub 2 is disposed at the vertex where the short side end D11 and long side end D12 of the electronic device 100 are connected, and is close to the vertex where it can be connected to the short side end B1 and long side end B2 of the ground plane 1. As described above, the orthographic projection of the first feeding point F1 on the ground plane 1 is located in the current weak point region Q1 of the characteristic mode current of the ground plane 1, where the current weak point region Q1 is located within a region with the intersection point of the extension lines of the adjacent short side B1 and long side B2 as the center O and a radius R of 1 / 16 of the wavelength of the first frequency band. Therefore, in some embodiments, by disposing the radiation stub 2 at the vertex where the short side end D11 and long side end D12 of the electronic device 100 are connected, it can be ensured as much as possible that the orthographic projection of the first feeding point F1 on the ground plane 1 is located in the current weak point region Q1 of the characteristic mode current of the ground plane 1. In some embodiments, the first feeding point F1 is disposed close to the vertex where the short side end D11 and long side end D12 of the electronic device 100 are connected. For example, it can be disposed at the connection of the first radiating sub-stub 21 and the second radiating sub-stub 22, so as to further ensure that the orthographic projection of the first feeding point F1 on the ground plane 1 is located in the current weak point region Q1 of the characteristic mode current of the ground plane 1.

[0112] That is, in some embodiments, the radiation stub 2 includes a connected first radiating sub-stub 21 and a second radiating sub-stub 22. When the first radiating sub-stub 21 and the second radiating sub-stub 22 are respectively disposed at an adjacent short side end D11 and a long side end D12 of the electronic device 100, the first feeding point F1 can be disposed at the connection of the first radiating sub-stub 21 and the second radiating sub-stub 22, so as to ensure that the orthographic projection of the first feeding point F1 on the ground plane 1 is located in the current weak point region Q1 of the characteristic mode current of the ground plane 1, and the characteristic mode current can be effectively excited. That is, the longitudinal characteristic mode current conducted along the long side B2 of the ground plane 1 can be effectively excited.

[0113] In some embodiments, the electronic device 100 includes a top end D11a, a bottom end D11b, a left side end D12a, and a right side segment D12b. Among them, the two short side ends D11 of the aforementioned electronic device 100 are respectively the top end D11a and the bottom end D11b, and the two long side ends D12 of the electronic device 100 are respectively the left side end D12a and the right side end D12b.

[0114] Among them, as described above, Figures 1 - 3 , Figure 5 and Figures 7 - 8 The figures such as are schematic views seen from the back of the electronic device 100, that is, schematic views seen from the side facing away from the display screen of the electronic device 100. Among them, the first radiating sub-branch 21 of the radiating branch 2 can be arranged at the top end D11a, and the second radiating sub-branch 22 of the radiating branch 2 is arranged on the left end D12a or the right end D12b, that is, the radiating branch 2 can be arranged at the upper left corner or the upper right corner of the electronic device 100 seen from the display screen side. Among them, Figures 1 - 3 , Figure 5 and Figures 7 - 8 In the figures such as, the case where the first radiating sub-branch 21 of the radiating branch 2 is arranged at the top end D11a and the second radiating sub-branch 22 of the radiating branch 2 is arranged at the left end D12a is taken as an example for illustration.

[0115] Obviously, Figures 1 - 3 , Figure 5 and Figures 7 - 8 The figures such as are only an example. In some embodiments, the radiating branch 2 can also be arranged at the lower right corner, lower left corner, etc. of the electronic device 100, or the radiating branch 2 can also be straight-shaped and arranged at a position close to the top end D11a or the bottom end D11b of one of the two side ends D12a and D12b.

[0116] Among them, the orientation terms such as "top" and "bottom" used in the embodiments of the present application to describe the electronic device 100 are mainly described based on the orientation when the user holds the electronic device 100. The position facing the top side of the electronic device 100 is the "top", and the position facing the bottom side of the electronic device 100 is the "bottom", which does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the orientation of the electronic device 100 in the actual application scenario. In some embodiments, the bottom end D11b of the electronic device 100 is the end provided with a headphone jack and a USB jack, and the top end D11a of the electronic device 100 is the other end opposite to the end provided with the headphone jack and the USB jack, and it can also refer to the end provided with a camera, a receiver, etc.

[0117] Please refer to Figure 10 , which is a partial structural schematic view of the electronic device 100 in some embodiments of the present application.

[0118] Among them, Figure 10 is also a schematic view seen from the back side of the electronic device 100. As Figure 10As shown, the radiation stub 2 is generally arc-shaped and is disposed at the upper left corner position when viewed from one side of the display screen. Among them, the electronic device 100 may further include a first feeding connector J1 and a second feeding connector J2. The first feed source 3 is connected to the first feeding point F1 through the first feeding connector J1, and the second feed source 4 is connected to the second feeding point F2 through the second feeding connector J2.

[0119] Among them, the first feeding connector J1 and the second feeding connector J2 may be one of a spring piece, an FPC (Flexible Printed Circuit), a coaxial cable, etc.

[0120] Please refer to Figure 11 , which is a schematic diagram of the current distribution of the radiation stub 2 when the asymmetric dipole antenna of the electronic device 100 in some embodiments of the present application operates in the first frequency band under the excitation of the first feed source 3. Among them, Figure 11 Specifically, the current distribution is schematically shown on the partial structure shown in Figure 10 , and specifically may be a schematic diagram of the current distribution obtained by performing a simulation test on the structure of the electronic device 100 shown in Figure 8 .

[0121] As Figure 11 shown, when the asymmetric dipole antenna of the electronic device 100 operates in the first frequency band under the excitation of the first feed source 3, a current i11 is uniformly distributed on the entire radiation stub 2. Thus, when the radiation stub 2 satisfies the electrical length required for coupling and exciting the ground plane to operate in the 1 / 2 wavelength resonance mode, a current i11 is uniformly distributed on the entire radiation stub 2, and the ground plane 1 can be effectively coupled and excited to operate in the 1 / 2 wavelength resonance mode.

[0122] Please refer to Figure 12 , which is a schematic diagram of the current distribution of the radiation stub 2 when the first feed source 3 of the electronic device 100 in some embodiments of the present application excites the radiation stub 2 to operate in the intermediate frequency band through the first feeding point F1. Among them, Figure 12 It is also specifically that the current distribution is schematically shown on the partial structure shown in Figure 10 , and specifically may be a schematic diagram of the current distribution obtained by performing a simulation test on the structure of the electronic device 100 shown in Figure 8 .

[0123] As described above, specifically, the equivalent electrical length of the stub portion Z1 between the first feeding point F1 of the radiating stub 2 and the second open end O2 is λ3 / 4, where λ3 is the wavelength corresponding to the intermediate frequency band. The first feeder 3 excites the stub portion Z1 of the radiating stub 2 through the first feeding point F1 to operate in the 1 / 4 wavelength resonance mode to support the transceiver of electromagnetic wave signals in the intermediate frequency band. As Figure 12 shown, when the first feeder 3 excites the radiating stub 2 to operate in the intermediate frequency band through the first feeding point, a current i12 is distributed on the stub portion Z1 of the radiating stub 2 located between the first feeding point F1 and the second open end O2. Thus, it can be seen that in the intermediate frequency band, the radiation is mainly carried out by the stub portion Z1 of the radiating stub 2 located between the first feeding point F1 and the second open end O2. Since the equivalent electrical length of the stub portion Z1 is λ3 / 4, the stub portion Z1 of the radiating stub 2 located between the first feeding point F1 and the second open end O2 can be excited by the first feeder 3 to support the transceiver of electromagnetic wave signals in the intermediate frequency band.

[0124] Please refer to Figure 13 , which is a schematic diagram of the current distribution of the radiating stub 2 when the first feeder 3 of the electronic device 100 in some embodiments of the present application excites the radiating stub 2 to operate in the ultra-high frequency band through the first feeding point F1. Among them, Figure 13 it is also specifically shown as the current distribution is schematically shown on the local structure in Figure 10 shown, and it can specifically be the schematic diagram of the current distribution obtained by simulating and testing the structure of the electronic device 100 shown in Figure 8 shown.

[0125] As described above, the first feeder 3 excites the radiating stub 2 to operate in the 3 / 4 wavelength resonance mode through the first feeding point F1 to support the transceiver of electromagnetic wave signals in the ultra-high frequency band. As Figure 13 shown, a current i13 is distributed on the entire radiating stub 2. Since the radiating stub 2 operates in the 3 / 4 wavelength resonance mode, a small part of the current will flow in the reverse direction, which conforms to the current distribution of the 3 / 4 wavelength resonance mode. Therefore, it can be seen from Figure 13 that the first feeder 3 can also excite the radiating stub 2 to operate in the 3 / 4 wavelength resonance mode through the first feeding point F1 to support the transceiver of electromagnetic wave signals in the ultra-high frequency band.

[0126] Please refer to Figure 14 , which is a schematic diagram of the current distribution of the radiating stub 2 when the second feeder 4 of the electronic device 100 in some embodiments of the present application excites the radiating stub 2 to operate in the third frequency band through the second feeding point F2. Among them, Figure 14 it is also specifically shown as inFigure 10 The current distribution is schematically shown on the local structure shown. Among them, Figure 14 It can be specifically, for example, Figure 8 Taking the structure of the electronic device 100 shown as an example, with the third frequency band being the WiFi 5G frequency band, the schematic diagram of the current distribution of the radiation stub 2 is obtained through simulation tests.

[0127] As mentioned above, the second feed 4 can support the transceiver of electromagnetic wave signals in the third frequency band by exciting the radiation stub 2 to operate in the 1 / 2 wavelength resonance mode through the second feeding point F2. As Figure 14 It can be seen that the current i14 is distributed on the entire radiation stub 2. Since the radiation stub 2 operates in the 1 / 2 wavelength resonance mode, therefore, the direction of the current i14 in the half part between the first open end O1 and the middle position of the radiation stub 2 is opposite to the direction of the current i14 in the other half part between the second open end O2 and the middle position of the radiation stub 2. Thus, when the second feed 4 excites the radiation stub 2 to operate in the 1 / 2 wavelength resonance mode through the second feeding point F2, it can support the transceiver of electromagnetic wave signals in the third frequency band.

[0128] Please refer to Figure 15 , which is a schematic diagram of the return loss and isolation curve of the electronic device 100 in some embodiments of the present application. Among them, Figure 15 It can be, for example, Figure 8 Taking the structure of the electronic device 100 shown as an example, the schematic diagram of the return loss and isolation is obtained through simulation tests.

[0129] Among them, Figure 15 The return loss curve S11-1 and the isolation curve Sg1 are schematically shown.

[0130] Among them, in a certain frequency band, the frequency corresponding to the lowest point of the same input return loss curve is the resonance frequency point. The lower the input return loss, the lower the loss at this resonance frequency, and the higher the antenna efficiency. Correspondingly, the higher the total system efficiency, the higher the antenna efficiency at this resonance frequency.

[0131] Among them, in the present application, taking the first frequency band as the B5 band in the low frequency band, the second frequency band and the fourth frequency band as the B3 band in the middle frequency band and the N78 band in the super high frequency band, and the third frequency band as the WiFi 5G frequency band as an example for illustration. Among them, the resonance frequency of the B5 band is approximately 850 MHz, the resonance frequency of the B3 band is approximately 1.75 GHz, the resonance frequency of the N78 band is approximately 3.5 GHz, and the resonance frequency of the WiFi 5G frequency band is approximately 5.3 GHz.

[0132] As Figure 15As shown, the return loss at the resonance frequency of 850 MHz in the first frequency band (Band B5) is approximately -9.5 dB, the return loss at the resonance frequency of 1.75 GHz in Band B3 of the intermediate frequency band is approximately -20 dB, the return loss at the resonance frequency of 3.5 GHz in Band N78 of the ultra-high frequency band is approximately -11.5 dB, and the return loss at the resonance frequency of 5.3 GHz in the third frequency band (WiFi 5G) is approximately -11 dB. Thus, when the electronic device 100 simultaneously supports the transceiver of electromagnetic wave signals in the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band, the return losses when operating in the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band are all low.

[0133] Generally speaking, the smaller the amplitude corresponding to the isolation, the smaller the interference between two frequency bands and the higher the isolation between them. As Figure 15 shown, at the resonance frequency of the first frequency band (Band B5), the isolation is approximately -11 dB, at the resonance frequency of 1.75 GHz in Band B3 of the intermediate frequency band, the isolation is also approximately -11 dB, at the resonance frequency of 3.5 GHz in Band N78 of the ultra-high frequency band, the isolation is approximately -11.5 dB, and at the resonance frequency of 5.3 GHz in the third frequency band (WiFi 5G), the isolation is approximately -18.5 dB. Thus, the amplitudes corresponding to the isolation of these four frequency bands are all low, and the isolation between them is high.

[0134] Therefore, from Figure 15 it can be seen that by sharing the radiation stub 2, the electronic device 100 can simultaneously support multiple frequency bands, and the return loss is still low, and the isolation of multiple frequency bands is high, and it can still have high antenna radiation performance.

[0135] Please refer to Figure 16 , which is a schematic diagram of the radiation efficiency and the total system efficiency curves of the electronic device in some embodiments of the present application. Among them, Figure 16 can be a schematic diagram of the radiation efficiency and the total system efficiency curves obtained by simulation testing when the electronic device 100 shown in Figure 8 operates in the first frequency band, the second frequency band, and the fourth frequency band under the excitation of the first feed 3.

[0136] That is, Figure 16 shows the radiation efficiency curve Sr1 and the total system efficiency curve St1 when the electronic device 100 operates in the first frequency band, the second frequency band, and the fourth frequency band.

[0137] Among them, the peak value of the total system efficiency curve of the same frequency band generally corresponds to the trough value of the corresponding input return curve. As Figure 16As shown, at the resonance frequency of 850 MHz in the first frequency band (Band B5), the radiation efficiency is approximately -10.5 dB, and the total system efficiency is approximately -11 dB. Both the radiation efficiency and the total system efficiency are relatively high. At the resonance frequency of 1.75 GHz in Band B3 of the intermediate frequency band, the radiation efficiency is approximately -4.8 dB, and the total system efficiency is also approximately -4.8 dB. Both the radiation efficiency and the total system efficiency are relatively high. At the resonance frequency of 3.5 GHz in Band N78 of the ultra-high frequency band, the radiation efficiency is approximately -3.5 dB, and the total system efficiency is also approximately -3.5 dB. Both the radiation efficiency and the total system efficiency are relatively high. Thus, when the electronic device 100 supports the transceiver of electromagnetic wave signals in the first frequency band, the second frequency band, and the fourth frequency band simultaneously under the excitation of the first feeder 3, the total system efficiency and the radiation efficiency when operating in the first frequency band, the second frequency band, and the fourth frequency band are both relatively high, and good antenna performance can be achieved.

[0138] Please refer to Figure 17 , which is another schematic diagram of the radiation efficiency and the total system efficiency curve of the electronic device in some embodiments of this application. Among them, Figure 17 can be Figure 8 the schematic diagram of the radiation efficiency and the total system efficiency curve obtained by simulating and testing the electronic device 100 shown in the figure when operating in the third frequency band under the excitation of the second feeder 4.

[0139] That is, Figure 17 schematically shows the radiation efficiency curve Sr2 and the total system efficiency curve St2 of the electronic device 100 when operating in the third frequency band.

[0140] Among them, Figure 17 also takes the third frequency band as WiFi 5G for illustration. As Figure 17 shown, at the resonance frequency of 5.3 GHz in the third frequency band (WiFi 5G), the radiation efficiency is approximately -2.5 dB, and the total system efficiency is approximately -3 dB. Both the radiation efficiency and the total system efficiency are very high. Thus, when the electronic device 100 operates in the third frequency band, both the total system efficiency and the radiation efficiency are relatively high, and good antenna performance can be achieved.

[0141] Among them, Figure 17 only for schematically showing the radiation efficiency and the total system efficiency of the radiation branch 2 of the electronic device 100 when operating in the third frequency band under the excitation of the second feeder 4. Therefore, Figure 17 the radiation efficiency curve Sr2 and the total system efficiency curve St2 in the figure only schematically show the curves near the third frequency band (WiFi 5G).

[0142] Therefore, through the above antenna structure of the present application, when the electronic device 100 operates in the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band, both the total system efficiency and the radiation efficiency are relatively high. Moreover, one radiation branch 2 can support multiple frequency bands, and the antenna performance of multiple frequency bands is relatively good.

[0143] Among them, in some embodiments, as described above, the first frequency band supported by the asymmetric dipole antenna formed by the radiation branch 2 and the ground plane 1 is a low-frequency band. In some embodiments, the electronic device 100 further includes at least one other feeder and at least one other radiation branch. The at least one other radiation branch supports the transceiver of electromagnetic wave signals in the low-frequency band under the excitation of the at least one other feeder. Alternatively, at least one of the at least one other radiation branches forms an asymmetric dipole antenna with the ground plane 1 respectively, and the asymmetric dipole antenna supports the transceiver of electromagnetic wave signals in the low-frequency band under the excitation of the other feeder. Thus, the asymmetric dipole antenna formed by the radiation branch 2 and the ground plane 1 can cooperate with the at least one other radiation branch to form a CA carrier aggregation of low frequency + low frequency or an ENDC (E-UTRAN New Radio–Dual Connectivity) dual-connection antenna system, or a 4*4 MIMO (multiple input multiple output) antenna system for the low-frequency band.

[0144] Among them, in some embodiments, the asymmetric dipole antenna formed by the radiation branch 2 and the ground plane 1 supports at least the transceiver of electromagnetic wave signals in one sub-band of the low-frequency band. That is, in some embodiments, the first frequency band may be one of the sub-bands of the low-frequency band. In some embodiments, the electronic device 100 includes two other feeders and two other radiation branches. Each of the other radiation branches is connected to the corresponding other feeder. One of the other radiation branches supports the transceiver of electromagnetic wave signals in another sub-band of the low-frequency band under the excitation of the corresponding other feeder, or forms an asymmetric dipole antenna with the ground plane 1 and supports the transceiver of electromagnetic wave signals in another sub-band of the low-frequency band under the excitation of the corresponding other feeder. The other other radiation branch supports the reception of electromagnetic wave signals in the one sub-band and the other sub-band under the excitation of the corresponding other feeder. Alternatively, the other other radiation branch forms an asymmetric dipole antenna with the ground plane 1 and supports the reception of electromagnetic wave signals in the one sub-band and the other sub-band under the excitation of the other feeder, so as to form a CA carrier aggregation or an ENDC dual-connection antenna system for the one sub-band and the other sub-band with the asymmetric dipole antenna formed by the radiation branch 2 and the ground plane 1.

[0145] For example, in some embodiments, the asymmetric dipole antenna formed by the radiation stub 2 and the ground plane 1 can support the transceiver of electromagnetic wave signals in the B5 or B28 frequency bands in the low-frequency band. One of the other radiation stubs supports the transceiver of electromagnetic wave signals in the B28 or B5 frequency bands in the low-frequency band under the excitation of the corresponding other feed source, and the other radiation stub supports the reception of electromagnetic wave signals in the B5 and B28 frequency bands under the excitation of the corresponding other feed source.

[0146] Thus, in some embodiments, when the first frequency band is a low-frequency band, the electronic device 100 may further include other feed sources and other radiation stubs, and can support the transceiver of electromagnetic wave signals in other sub-bands in the first frequency band, then it can form a low-frequency + low-frequency antenna system with the asymmetric dipole antenna formed by the radiation stub 2 and the ground plane 1. And in this application, at least the asymmetric dipole antenna is formed by the radiation stub 2 and the ground plane 1 to support the transceiver of electromagnetic wave signals in the first frequency band. Thus, the radiation stub 2 originally used to operate in the first frequency band can be shared, and a relatively large-sized low-frequency radiation stub can be effectively reduced. Moreover, further, when at least one of the at least one other radiation stubs forms an asymmetric dipole antenna with the ground plane 1 respectively, the other radiation stub can also be a radiation stub originally used for a higher frequency band, such as a radiation stub used for high-frequency bands such as WiFi 2.4G, WiFi 5G, N78, etc., which can further reduce a low-frequency radiation stub.

[0147] In some embodiments, the first frequency band may be a low-frequency band, the number of the at least one other radiation stubs is three, and the three other radiation stubs support the transceiver of electromagnetic wave signals in the first frequency band under the excitation of the at least one other feed source, or at least one of the three other radiation stubs forms an asymmetric dipole antenna with the ground plane 1 respectively, and the asymmetric dipole antenna supports the transceiver of electromagnetic wave signals in the first frequency band under the excitation of the other feed source, so as to form a 4×4 MIMO (multiple input multiple output) antenna system in the low-frequency band with the asymmetric dipole antenna formed by the radiation stub and the ground plane.

[0148] Among them, in some embodiments, as described above, when constituting the 4×4 MIMO (multiple input multiple output) antenna system of the low-frequency band, specifically, the three other radiation branches support the transceiver of electromagnetic wave signals of a sub-band in the low-frequency band of the first band under the excitation of the at least one other feeder 5. Or, at least one of the three other radiation branches forms an asymmetric dipole antenna with the ground plane 1, and the asymmetric dipole antenna supports the transceiver of electromagnetic wave signals of a sub-band of the low-frequency band under the excitation of the other feeder 5, and the sub-band of the low-frequency band supported by the asymmetric dipole antenna formed by the radiation branch 2 and the ground plane 1 is the same.

[0149] That is, the asymmetric dipole antenna formed by the radiation branch 2 and the ground plane 1 and the three other radiation branches support or cooperate to support the same sub-band of the low-frequency band. For example, they are all the B5 band, and a 4×4 MIMO antenna system of the B5 band is realized to improve the antenna radiation performance of the B5 band.

[0150] Similarly, in the present application, at least the asymmetric dipole antenna is formed by the radiation branch 2 and the ground plane 1 to support the transceiver of electromagnetic wave signals of the second band. Thus, the radiation branch 2 originally used for the first band can be shared, and a relatively large-sized low-frequency radiation branch can be effectively reduced. Moreover, further, when at least one of the at least one other radiation branch forms an asymmetric dipole antenna with the ground plane 1 respectively, the other radiation branch can also be a radiation branch originally used for a higher frequency band, such as a radiation branch used for high-frequency bands such as WiFi 2.4G, WiFi 5G, and N78, which can further reduce a low-frequency radiation branch.

[0151] Among them, as Figures 1 - 2 shown in the figures, the electronic device 100 includes a middle frame 101, and the ground plane 1 is at least a partial area in the middle frame 101.

[0152] That is, in some embodiments, the ground plane 1 may specifically be the middle frame 101 or a partial area isolated by a gap in the middle frame 101.

[0153] Generally, the middle frame 101 of the electronic device 100 is made of a metal material and is the whole machine ground of the electronic device 100. In some embodiments of the present application, at least a partial area of the middle frame 101 is reused as the ground plane 1 to cooperate with the radiation branch 2 to form an asymmetric dipole antenna, without adding an additional antenna structure, saving cost and space.

[0154] Please refer toFigure 18 , is a schematic diagram of the back of the electronic device 100 in some embodiments of the present application. As Figure 18 shown, in some embodiments, the electronic device 100 includes a metal back cover 102, and the ground plane 1 is at least a part of the area in the metal back cover 102.

[0155] That is, in some embodiments, the ground plane 1 may specifically be the metal back cover 102, or a part of the area isolated by a gap in the metal back cover 102. Among them, the metal back cover 102 can be connected to the middle frame 101 to be grounded.

[0156] Therefore, in some embodiments of the present application, by reusing at least a part of the area of the metal back cover 102 as the ground plane 1 to cooperate with the radiation stub 2 to form an asymmetric dipole antenna, no additional antenna structure needs to be added, saving costs and space.

[0157] Obviously, in some embodiments, when the ground plane 1 is at least a part of the area in the middle frame 101, the back cover of the electronic device 100 may not be a metal back cover, but a back cover made of other materials, such as a plastic back cover, a ceramic back cover, and so on.

[0158] Among them, since both the middle frame 101 and the metal back cover 102 are relatively large in size and can meet the size requirements for low-frequency radiation. Since the wavelength corresponding to the low-frequency band is relatively long, the equivalent electrical length of the general middle frame 101 or metal back cover 102, such as the length of the long side, can basically meet 1 / 2 wavelength of the low-frequency band. As mentioned above, the ground plane 1 can also be a part of the area isolated by a gap in the middle frame 101, or the ground plane 1 can also be a part of the area isolated by a gap in the metal back cover 102. Thus, a corresponding-sized area can be isolated more accurately according to 1 / 2 of the wavelength corresponding to the low-frequency band. Or, as mentioned above, the ground plane 1 can also meet the equivalent electrical length of nλ / 2 + λ / 4 under the matching adjustment of the matching unit M1.

[0159] Among them, when the ground plane 1 is a part of the area isolated by a gap in the middle frame 101, the part of the area serving as the ground plane 1 is electrically isolated from other areas, and an insulating material is filled between it and other areas to maintain the structural stability of the overall middle frame 101. Similarly, when the ground plane 1 is a part of the area isolated by a gap in the metal back cover 102, the part of the area serving as the ground plane 1 is electrically isolated from other areas, and an insulating material is filled between it and other areas to maintain the structural stability of the overall metal back cover 102.

[0160] Among them, as Figure 18As shown, a camera hole 102a may be formed on the metal rear cover 102 for the rear camera (not shown in the figure) of the electronic device 100 to receive light for shooting.

[0161] Therefore, in this application, the electronic device 100 includes a middle frame 101, and the grounding plate 1 is at least a part of the area in the middle frame 101. Alternatively, the electronic device 100 includes a metal rear cover 102, and the grounding plate 1 is at least a part of the area in the metal rear cover 102.

[0162] Please refer back to Figure 3 and Figure 5 such figures, as Figure 3 and Figure 5 shown in such figures as

[0163] In some embodiments, the frame 110 of the electronic device 100 is a metal frame, and the radiation stub 2 is a metal frame segment formed by opening the slit X1 in the metal frame of the electronic device 100.

[0164] Among them, in some other embodiments, the frame 110 of the electronic device 100 is a non-metal frame, and the radiation stub 2 is a metal segment disposed in the frame of the electronic device 100.

[0165] That is, in some other embodiments, the frame 110 of the electronic device 100 can also be a non-metal frame with low electrical conductivity such as plastic, plastic, or ceramic. The radiation stub 2 is a metal segment disposed in the frame 110 of the electronic device 100.

[0166] Among them, the radiation stub 2 can be embedded in the frame of the electronic device 100 or disposed on the inner side surface of the frame of the electronic device 100.

[0167] Among them, when the electronic device 100 further includes the other radiation stubs, the other radiation stubs can also be metal segments disposed on the frame 110 of the electronic device 100. For example, when the frame 110 of the electronic device 100 is a metal frame, the other radiation stubs are also metal frame segments formed by opening the slit X1 in the metal frame of the electronic device 100. Or, when the frame 110 of the electronic device 100 is a non-metal frame, the other radiation stubs are metal segments disposed in the frame of the electronic device 100.

[0168] In some embodiments, such as Figure 1 、 Figure 3 and Figure 5As shown in the figures, the electronic device 100 further includes a main board 103. Among them, the aforementioned first feeder 3, second feeder 4, etc. may be disposed on the main board 103. Among them, when the electronic device 100 further includes the first matching unit M1, the second matching unit M2, and the third matching unit M3, the first matching unit M1, the second matching unit M2, and the third matching unit M3 may also be disposed on the main board 103.

[0169] In some embodiments, the radiation branches 2 and other radiation branches may also be disposed on the antenna bracket and be disposed in the electronic device 100 through the antenna bracket. For example, they are disposed on the main board 103 through the antenna bracket and may be close to the frame 110.

[0170] Among them, the radiation branches 2 and the like may be LDS (laser direct structuring) antennas formed on the antenna bracket of the main board 103 by laser ablation technology, that is, an antenna bracket is disposed on the main board 103, and then an LDS antenna is formed thereon. Among them, the LDS antenna refers to a metal antenna pattern directly plated on the antenna bracket by laser ablation technology. Alternatively, the radiation branches 2 and other radiation branches may be FPC (flexible printed circuit) antennas disposed on the main board 103 and other positions by laser ablation technology. Among them, the FPC antenna refers to a metal antenna pattern formed on the FPC, and the FPC antenna may be fixed to the main board 103 by bonding, embedding, welding, etc.

[0171] Among them, the electronic device 100 may be any device including an antenna, such as a mobile phone, a tablet computer, a smart watch, a notebook computer, etc.

[0172] In the electronic device 100 in this application, the radiation stub 2 can support the transceiver of electromagnetic wave signals in the second frequency band under the excitation of the first feeder 3, can also support the transceiver of electromagnetic wave signals in the third frequency band under the excitation of the second feeder 4, and can also form an asymmetric dipole antenna with the ground plane 1 to support the transceiver of electromagnetic wave signals in the first frequency band under the excitation of the first feeder 3. Thus, at least three frequency bands can be supported by one radiation stub, and the requirements of multiple antenna frequency bands can be met within a limited space. In addition, since the first frequency band is lower than the second frequency band and the third frequency band, the antenna size requirements corresponding to the first frequency band are larger. In the structure of the asymmetric dipole antenna, since the radiation is mainly carried out by the larger branch, in this application, the radiation stub 2 forms an asymmetric dipole antenna with the ground plane 1, and the size of the ground plane 1 can mainly meet the requirements for a larger-sized radiator when supporting the first frequency band with a lower frequency, so that the radiation stub can be shared with the higher-frequency second frequency band and third frequency band, and at least one radiation stub with a larger size can be omitted, further reducing the space occupation.

[0173] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0174] The above description is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application; without conflict, the embodiments of this application and the features in the embodiments can be combined with each other. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. An electronic device, characterized in that, Comprising: A ground plane; Radiating stubs, including a first feeding point and a second feeding point; A first feed source connected to the first feeding point, wherein the radiating stub is adjacent to and spaced from the ground plane, and the radiating stub and the ground plane form an asymmetric dipole antenna. The asymmetric dipole antenna supports the transceiver of electromagnetic wave signals in a first frequency band under the excitation of the first feed source, and the first feed source also excites the radiating stub through the first feeding point to support at least the transceiver of electromagnetic wave signals in a second frequency band; A second feed source connected to the second feeding point, and the second feed source excites the radiating stub through the second feeding point to support the transceiver of electromagnetic wave signals in a third frequency band; wherein the first frequency band is lower than the second frequency band and the third frequency band.

2. The electronic device according to claim 1, characterized in that, The radiating stub includes opposite first open end and second open end, the first feeding point is arranged at a position between the first open end and the second open end, and the second feeding point is arranged at the first open end.

3. The electronic device according to claim 1, wherein The radiating stub and the ground plane are coupled to form a 1 / 2 wavelength asymmetric dipole antenna, and the first feed source excites the ground plane to work in a 1 / 2 wavelength resonance mode through the coupling of the radiating stub.

4. The electronic device according to claim 3, characterized in that, The equivalent electrical length of the ground plane is nλ1 + λ1 / 2, where λ1 is the wavelength corresponding to the first frequency band, and n is 0 or a positive integer.

5. The electronic device according to claim 4, wherein The ground plane is rectangular, including two opposite short sides and two opposite long sides. The radiating stub is arranged close to one short side of the ground plane. The first feed source excites the ground plane to generate a current conducting along the long side through the coupling of the radiating stub to work in a 1 / 2 wavelength resonance mode, and the equivalent electrical length of the ground plane is the equivalent electrical length of the long side of the ground plane.

6. The electronic device according to claim 5, wherein The orthogonal projection of the first feeding point on the ground plane is located in the current weak point area of the characteristic mode current of the ground plane, and the current weak point area is located in a region centered at the intersection of the extension lines of the adjacent short side and long side, with a radius of 1 / 16 of the wavelength of the first frequency band.

7. The electronic device according to claim 3, characterized in that, The equivalent electrical length of the radiating stub satisfies the electrical length required for coupling to excite the ground plane to work in a 1 / 2 wavelength resonance mode.

8. The electronic device according to claim 7, characterized in that, The electronic device further includes a first matching unit connected between the first feed source and the first feeding point, and the equivalent electrical length of the radiating stub in cooperation with the first matching unit satisfies the electrical length required for coupling to excite the ground plane to work in a 1 / 2 wavelength resonance mode.

9. The electronic device according to claim 8, wherein The first matching unit includes a first inductor connected between the first feed source and the first feeding point, and a second inductor connected between one end of the first inductor connected to the feed source and the ground.

10. The electronic device according to claim 1, wherein The first frequency band is a low frequency band.

11. The electronic device according to claim 2, wherein The first feed source also excites the radiating stub through the first feeding point to support the transceiver of electromagnetic wave signals in a fourth frequency band, and the working mode of the fourth frequency band is different from that of the second frequency band.

12. The electronic device according to claim 11, wherein The second frequency band is one of a medium frequency band and a super high frequency band, and the fourth frequency band is the other of the medium frequency band and the super high frequency band.

13. The electronic device according to claim 12, characterized in that, The first feeder excites the radiation stub to operate in a 3 / 4-wavelength resonance mode through the first feeding point to support the transceiver of electromagnetic wave signals in the ultra-high frequency band. The equivalent electrical length of the stub portion between the first feeding point of the radiation stub and the second open end is λ3 / 4, where λ3 is the wavelength corresponding to the intermediate frequency band. The first feeder excites the radiation stub to operate in a 1 / 4-wavelength resonance mode through the first feeding point to support the transceiver of electromagnetic wave signals in the intermediate frequency band.

14. The electronic device according to claim 1, wherein The second feeder excites the radiation stub to operate in a 1 / 2-wavelength resonance mode through the second feeding point to support the transceiver of electromagnetic wave signals in the third frequency band.

15. The electronic device according to claim 14, wherein, The third frequency band is the WiFi 5G frequency band.

16. The electronic device according to claim 1, wherein The electronic device includes two opposite short side ends and two opposite long side ends. The radiation stub includes a first radiation sub-stub and a second radiation sub-stub connected to each other. The first radiation sub-stub and the second radiation sub-stub are respectively disposed on an adjacent short side end and a long side end of the electronic device. The first feeding point is disposed at the connection of the first radiation sub-stub and the second radiation sub-stub.

17. The electronic device according to claim 1, characterized in that The electronic device includes a middle frame, and the ground plane is at least part of the area in the middle frame. Alternatively, the electronic device includes a metal back cover, and the ground plane is at least part of the area in the metal back cover.

18. The electronic device according to claim 1, characterized in that, The electronic device includes a frame, and the radiation stub is a metal segment disposed on the frame. Alternatively, the electronic device further includes an antenna bracket made of an insulating material. The radiation stub is fixed on the antenna bracket and fixed in the electronic device through the antenna bracket.

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