Antenna assembly and electronic equipment

Abstract

The embodiment of the invention provides electronic equipment. The electronic equipment comprises a first antenna unit and a second antenna unit, the first antenna unit comprises a first radiation branch knot and a first feed source. The second antenna unit comprises a second radiation branch knot, a third radiation branch knot and a second feed source. The second radiation branch knot and the third radiation branch knot are adjacent and arranged at intervals. The first radiation branch knot is divided into a first radiation sub-branch knot and a second radiation sub-branch knot through the feeding point, at least when the electronic equipment is in a preset state, the second radiation branch knot is adjacent and parallel to the first radiation sub-branch knot, and the third radiation branch knot is adjacent and parallel to the second radiation sub-branch knot; the first radiation branch generates current in a first polarization direction under excitation of the first feed source, and the second radiation branch and the third radiation branch generate current in a second polarization direction perpendicular to the first polarization direction under excitation of the second feed source. The invention also provides an antenna assembly. According to the invention, the isolation between the antenna units can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna assembly and an electronic device having the antenna assembly. Background Art

[0002] At present, with the popularization of 5G communication technology, people's communication experience is getting better and better. With the popularization of full-screen and curved screens, the clearance left for antennas is getting smaller and smaller. In some cases, multiple same-frequency antennas need to be set up to achieve multi-input and output functions. However, there will be greater interference between same-frequency antennas. In order to increase the isolation between same-frequency antennas, additional decoupling elements are often used or the same-frequency antennas are set farther away, which leads to increased costs or difficulties in layout. Summary of the invention

[0003] The present application provides an antenna assembly and an electronic device to solve the above problems.

[0004] In a first aspect, an electronic device is provided, the electronic device comprising a first antenna unit and a second antenna unit. The first antenna unit comprises a first radiating branch and a first feed source, the first radiating branch comprises a feeding point for connecting to the first feed source, and the first radiating branch operates in a preset frequency band under the excitation of the first feed source. The second antenna unit comprises a second radiating branch, a third radiating branch and a second feed source, wherein the second radiating branch and the third radiating branch are adjacent and spaced apart, the second feed source is connected to both the second radiating branch and the third radiating branch, and the second radiating branch and the third radiating branch operate in the preset frequency band under the excitation of the second feed source. Wherein, the first radiation branch is divided into a first radiation sub-branch and a second radiation sub-branch through the feeding point, and at least when the electronic device is in a preset state, the second radiation branch is adjacent to and parallel to the first radiation sub-branch, and the third radiation branch is adjacent to and parallel to the second radiation sub-branch; wherein, the first radiation branch generates a current in a first polarization direction under the excitation of the first feed source, and the second radiation branch and the third radiation branch generate a current in a second polarization direction under the excitation of the second feed source, and the first polarization direction is perpendicular to the second polarization direction.

[0005] In a second aspect, an antenna assembly is also provided, the antenna assembly comprising a first antenna unit and a second antenna unit. The first antenna unit comprises a first radiating branch and a first feed source, the first radiating branch comprises a feeding point for connecting to the first feed source, and the first radiating branch operates in a preset frequency band under the excitation of the first feed source. The second antenna unit comprises a second radiating branch, a third radiating branch and a second feed source, wherein the second radiating branch and the third radiating branch are adjacent and spaced apart, the second feed source is connected to both the second radiating branch and the third radiating branch, and the second radiating branch and the third radiating branch operate in the preset frequency band under the excitation of the second feed source. Wherein, the first radiation branch is divided into a first radiation sub-branch and a second radiation sub-branch through the feeding point, the second radiation branch is adjacent to and parallel to the first radiation sub-branch, and the third radiation branch is adjacent to and parallel to the second radiation sub-branch; wherein, the first radiation branch generates a current in a first polarization direction under the excitation of the first feed source, and the second radiation branch and the third radiation branch present a current in a second polarization direction under the excitation of the second feed source, and the first polarization direction is perpendicular to the second polarization direction.

[0006] In the electronic device and antenna assembly of the present application, the first radiating branch presents a polarization direction under the excitation of the first feed source that is approximately perpendicular to the direction of the current generated by the second radiating branch and the third radiating branch under the excitation of the second feed source, thereby enabling the direction of the electromagnetic wave signal radiated by the first antenna unit to be approximately perpendicular to the direction of the electromagnetic wave signal radiated by the second antenna unit, and making the electromagnetic wave signals radiated by the two basically non-interfering with each other, thereby greatly improving the isolation between the first antenna unit and the second antenna unit operating in the same preset frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0008] Figure 1 It is a schematic plan view showing part of the internal structure of an electronic device in an embodiment of the present application.

[0009] Figure 2 This is a schematic diagram of current distribution when the first antenna unit of the electronic device in some embodiments of the present application is working.

[0010] Figure 3 This is a schematic diagram of current distribution when the second antenna unit of the electronic device in some embodiments of the present application is working.

[0011] Figure 4This is a schematic diagram of current distribution on the ground plate when the first antenna unit of the electronic device in some embodiments of the present application is working.

[0012] Figure 5 This is a schematic diagram of current distribution on the ground plate when the second antenna unit of the electronic device in some embodiments of the present application is working.

[0013] Figure 6 A schematic diagram of the return loss and total system efficiency of the first antenna unit and the second antenna unit of the electronic device in some embodiments of the present application.

[0014] Figure 7 A schematic diagram of return loss and isolation of a first antenna unit and a second antenna unit of an electronic device in some embodiments of the present application.

[0015] Figure 8 Schematic diagram of envelope correlation coefficient (ECC) curves of the first antenna unit and the second antenna unit of the electronic device in some embodiments of the present application.

[0016] Fig. 9 Another schematic plan view of an electronic device in some embodiments of the present application.

[0017] Fig.10 Another schematic diagram of current distribution when the first antenna unit of the electronic device in some embodiments of the present application is working.

[0018] Fig.11 Another schematic diagram of current distribution when the second antenna unit of the electronic device in some embodiments of the present application is working.

[0019] Fig.12 It is another schematic plan view of an electronic device in some embodiments of the present application.

[0020] Fig.13 It is another schematic plan view of the electronic device in some embodiments of the present application.

[0021] Fig.14 Another schematic diagram of return loss and isolation of the first antenna unit and the second antenna unit of the electronic device in some embodiments of the present application.

[0022] Fig.15 This is another schematic diagram of current distribution on the ground plate when the first antenna unit of the electronic device in some embodiments of the present application is working.

[0023] Fig.16 Another schematic diagram of current distribution on the ground plate when the second antenna unit of the electronic device in some embodiments of the present application is working.

[0024] Fig.17Other schematic plan views of electronic devices in some embodiments of the present application.

[0025] Fig.18 This is a structural block diagram of an electronic device in some embodiments of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "thickness", "width", etc. is based on the orientation or positional relationship shown in the accompanying 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 on the present invention. The term "connection" in this application includes relationships such as direct connection, indirect connection, and electrical connection. 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. If there is a description in the specification, the objects with the same name referred to by the terms "first", "second", "third", "fourth", etc. may be the same objects.

[0028] See also Figure 1 , is a schematic plan view showing a part of the internal structure of the electronic device 100 in one embodiment of the present application. Figure 1As shown, the electronic device 100 includes a first antenna unit 1 and a second antenna unit 2, the first antenna unit 1 includes a first radiating branch 11 and a first feed source 12, the first radiating branch 11 includes a feed point F1 for connecting to the first feed source 12, the first radiating branch 11 operates in a preset frequency band under the excitation of the first feed source 12, that is, supports the reception and transmission of electromagnetic wave signals in the preset frequency band. The second antenna unit 2 includes a second radiating branch 21, a third radiating branch 22 and a second feed source 23, wherein the second radiating branch 21 and the three radiating branches 22 are adjacent and spaced apart, the second feed source 23 is connected to both the second radiating branch 21 and the third radiating branch 22, the second radiating branch 21 and the third radiating branch 22 operate in the preset frequency band under the excitation of the second feed source 23, that is, also support the reception and transmission of electromagnetic wave signals in the preset frequency band. Among them, the first radiation branch 11 is divided into a first radiation sub-branch 111 and a second radiation sub-branch 112 through the feeding point F1, and at least when the electronic device 100 is in a preset state, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112; wherein, the first radiation branch 11 generates a current in a first polarization direction under the excitation of the first feed source 12, and the second radiation branch 21 and the third radiation branch 22 generate a current in a second polarization direction under the excitation of the second feed source 23, and the first polarization direction is perpendicular to the second polarization direction.

[0029] Thus, the electronic device 100 of the present application, through the first antenna unit 1 and the second antenna unit 2 of the above structure, even if at least when the electronic device 100 is in a preset state, the first radiation branch 11 of the first antenna unit 1 and the second radiation branch 21 and the third radiation branch 22 of the second antenna unit 2 are adjacent, because the direction of the current generated by the first radiation branch 11 under the excitation of the first feed source 12 is perpendicular to the direction of the current generated by the second radiation branch 21 and the third radiation branch 22 under the excitation of the second feed source 23, and the direction of the current usually affects the radiation direction of the electromagnetic wave, the direction of the current can be regarded as the radiation direction of the electromagnetic wave signal, so that the direction of the electromagnetic wave signal radiated by the first antenna unit 1 can be perpendicular to the direction of the electromagnetic wave signal radiated by the second antenna unit 2, and the electromagnetic wave signals radiated by the two basically do not interfere with each other, thereby greatly improving the isolation between the first antenna unit 1 and the second antenna unit 2 operating in the same preset frequency band.

[0030] Among them, in the present application, the first polarization direction and the second polarization direction are perpendicular, which does not mean perpendicular in a strict sense, but approximately perpendicular. For example, the angle between the first polarization direction and the second polarization direction can be between 80° and 100°, which can be regarded as perpendicular.

[0031] like Figure 1 As shown, the first radiation branch 11 includes a first free end P11 and a second free end P12 opposite to each other, the feeding point F1 is located between the first free end P11 and the second free end P12, the first radiation sub-branch 111 is a portion between the first free end P11 of the first radiation branch 11 and the feeding point F1, the second radiation sub-branch 112 is a portion between the second free end P12 of the first radiation branch 11 and the feeding point F1, the first feed source 12 includes a first signal end 121, the feeding point F1 is connected to the first signal end 121; the second radiation branch 111 is a portion between the first free end P11 of the first radiation branch 11 and the feeding point F1, the first radiation sub-branch 112 is a portion between the second free end P12 of the first radiation branch 11 and the feeding point F1, the first feed source 12 includes a first signal end 121, the feeding point F1 is connected to the first signal end 121; Section 21 includes a relative first feeding terminal F21 and a first grounding terminal G21, the third radiating branch 22 includes a relative second feeding terminal F22 and a second grounding terminal G22, the first grounding terminal G21 and the second grounding terminal G22 are used for grounding, the first feeding terminal F21 and the second feeding terminal F22 are adjacent to and spaced apart, the second feed source 23 includes a second signal terminal 231 and a third signal terminal 232, the second signal terminal 231 is connected to the first feeding terminal F21 of the second radiating branch 21, and the third signal terminal 232 is connected to the second feeding terminal F22 of the second radiating branch 21.

[0032] Wherein, A and B being adjacent and spaced apart in the present application refers to A and B being close and spaced apart. In the present application, A and B being adjacent also refers to the two being close but not touching, that is, being close and spaced apart. For example, the distance between A and B is less than a preset distance, such as 1 cm, and being spaced apart from each other. Wherein, the first free end P11 and the second free end P12 in the present application refer to the ends being suspended and being open-circuited ends. Wherein, the first feeding end F21 and the first grounding end G21 may be the two opposite ends of the second radiation branch 21, and may also include the two ends of the second radiation branch 21 and the areas close to the two ends. The second feeding end F22 and the second grounding end G22 may also be the two opposite ends of the third radiation branch 22, and may also include the two ends of the third radiation branch 22 and the areas close to the two ends.

[0033] In some embodiments, the first signal end 121 of the first feed source 12 is used to output a first feed signal. When the first radiation branch 11 is excited by the first feed source 12, it mainly generates a current along the first polarization direction so that the resonance generated by the first radiation branch 11 presents the first polarization direction. The second signal end 231 and the third signal end 232 are used to output a second feed signal and a third feed signal respectively. The second feed signal and the third feed signal differ in phase by 180°. The second radiation branch 21 and the third radiation branch 22 are respectively excited by the second feed signal and the third feed signal, and mainly generate a current along the second polarization direction so that the resonance generated by the second radiation branch 21 and the third radiation branch 22 presents the second polarization direction.

[0034] Among them, the direction of the current generated after a certain radiating branch is excited determines the polarization direction of the resonance of the radiating branch, that is, the radiation direction of the electromagnetic wave signal. In the present application, the above-mentioned structure is used to make the first radiating branch 11 of the first antenna unit 1 mainly generate current along the first polarization direction under the excitation of the first feed source 12, and the second radiating branch 21 and the third radiating branch 22 mainly generate current along the second polarization direction under the excitation of the second feed source 23, so that the directions of the electromagnetic wave signals radiated by the two antenna units can be roughly perpendicular without interfering with each other.

[0035] It can be seen from the aforementioned structure that in some embodiments of the present application, the first antenna unit 1 forms a T antenna, and the second antenna unit 2 forms a Loop antenna.

[0036] See also Figure 2 , is a schematic diagram of current distribution when the first antenna unit 1 of the electronic device 100 in some embodiments of the present application is working. Among them, Figure 2 Specifically, when at least the electronic device 100 is in a preset state, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, the first radiation branch 11 of the first antenna unit 1 generates an overall current distribution diagram of the first antenna unit 1 and the second antenna unit 2 under the excitation of the first feed source 12, that is, Figure 1 The current distribution diagram of the first antenna unit 1 when working under the structure of the electronic device 100 shown in FIG. Figure 2 In order to better illustrate the current, Figure 1 Some of the numbers are omitted.

[0037] like Figure 2As shown, the first radiation branch 11 generates a current I1 from the first free end P11 to the feeding point F1 and a current I2 from the second free end P12 to the feeding point F1 under the stimulation of the first signal end 121 of the first feed source 12. That is, currents in opposite directions are generated on the first radiation sub-branch 111 and the second radiation sub-branch 112. In addition, the two currents I1 in opposite directions are combined to form a current I12 coupled from the first radiation branch 11 to the ground. Specifically, the current I12 may be coupled from the feeding point F1 of the first radiation branch 11 to the ground.

[0038] At the same time, the first radiation sub-branch 111 also stimulates the second radiation branch 21 adjacent and parallel to it to generate a current I3 from the first feeding terminal F21 to the first ground terminal G21, and the second radiation sub-branch 112 also stimulates the third radiation branch 22 adjacent and parallel to it to generate a current I4 from the second feeding terminal F22 to the second ground terminal G22. After the current I3 and the current I4 return to the ground through the first ground terminal G21 and the second ground terminal G22 respectively, they form return currents I3' and I4' in the same direction as the current I12, and both are approximately in the first polarization direction.

[0039] Therefore, if Figure 2 As shown, the main current of the first antenna unit 1 and the second antenna unit 2 as a whole generated by the first radiating branch 11 of the first antenna unit 1 under the excitation of the first feed source 12 is the current from the first radiating branch 11 to the ground, the current from the first grounding end G21 of the second radiating branch 21 back to the ground, and the current from the second grounding end G22 of the third radiating branch 22 back to the ground, and the directions of these currents are all the first polarization directions. Therefore, when the first radiating branch 11 is excited by the first signal end 121 of the first feed source 12, the first antenna unit 1 and the second antenna unit 2 as a whole mainly have currents in the first polarization direction, and the resonance generated as a whole presents the first polarization direction.

[0040] Among them, in the present application, the resonance generated by the aforementioned first radiation branch 11 presents a first polarization direction, which specifically refers to that when the first radiation branch 11 is excited by the first feed source 12, the resonance generated by the first antenna unit 1 and the second antenna unit 2 as a whole presents a first polarization direction. The resonance generated by the second radiation branch 21 and the third radiation branch 22 presents a second polarization direction, which specifically refers to that when the second radiation branch 21 and the third radiation branch 22 are excited by the second feed source 23, the resonance generated by the first antenna unit 1 and the second antenna unit 2 as a whole presents a second polarization direction.

[0041] Correspondingly, in the present application, when the first radiating branch 11 is excited by the first feed source 12, it mainly generates a current along the first polarization direction so that the first radiating branch 11 produces a first polarization direction. This may mean that when the first radiating branch 11 is excited by the first feed source 12, the first antenna unit 1 and the second antenna unit 2 as a whole mainly generate a current along the first polarization direction, so that the resonance produced by the first antenna unit 1 and the second antenna unit 2 as a whole presents the first polarization direction. The aforementioned second radiation branch 21 and the third radiation branch 22 mainly generate current along the second polarization direction under the excitation of the second feed signal and the third feed signal respectively, so that the resonance generated by the second radiation branch 21 and the third radiation branch 22 presents the second polarization direction. This may mean that when the second radiation branch 21 and the third radiation branch 22 are respectively excited by the second feed signal and the third feed signal, the first antenna unit 1 and the second antenna unit 2 as a whole mainly generate current along the second polarization direction, so that the resonance generated by the first antenna unit 1 and the second antenna unit 2 as a whole presents the second polarization direction.

[0042] Among them, Figure 1 and Figure 2 As shown, the electronic device 100 further includes a grounding plate 3, and the grounding plate 3 is used to provide a ground potential. The first grounding terminal G21 and the second grounding terminal G22 mentioned above can be grounded by being connected to the grounding plate 3.

[0043] In some embodiments, Figure 1 and Figure 2 As shown, the first signal end 121 of the first feed source 12 is also connected to a matching unit M1, that is, the first antenna unit 1 also includes a matching unit M1, wherein the first signal end 121 of the first feed source 12 is connected to the feeding point F1 through the matching unit M1. The matching unit M1 includes a plurality of matching elements for implementing impedance matching adjustment to improve radiation efficiency. The matching unit M1 may also include a ground matching element, and the current I12 may be transmitted from the feeding point F1 of the first radiation branch 11 to the ground through the ground matching element in the matching unit M1. Obviously, in some embodiments, the current I12 may also be transmitted to the ground through the coupling between the first radiation branch 11 and the ground plate 3.

[0044] As mentioned above, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, and the first feeding end F21 and the second feeding end F22 are adjacent to and spaced apart from each other. Figure 1 and Figure 2 As shown, in some embodiments, the first feeding end F21 of the second radiation branch 21 and the second feeding end F22 of the third radiation branch 22 are close to the feeding point F1 of the first radiation sub-branch 111, and the first grounding end G21 of the second radiation branch 21 is close to the first free end P11 of the first radiation sub-branch 111, and the second grounding end G22 of the third radiation branch 22 is close to the first free end P11 of the first radiation sub-branch 111.

[0045] Therefore, if Figure 2 As shown, the directions of the current I1 on the first radiation sub-branch 111 and the current I3 from the first feeding terminal F21 to the first ground terminal G21 generated by the second radiation branch 21 under the excitation of the first radiation sub-branch 111 are approximately parallel and opposite, and the current I2 on the second radiation sub-branch 112 and the current I4 from the second feeding terminal F22 to the second ground terminal G22 generated by the third radiation branch 22 under the excitation of the second radiation sub-branch 112 are approximately parallel and opposite.

[0046] The second radiation branch 21 and the third radiation branch 22 form a loop antenna. Figure 2 As shown, after the current I3 and the current I4 return to the ground through the first ground terminal G21 and the second ground terminal G22 respectively, the return currents I3' and I4' in the same direction as the current I2 are formed and enter the grounding plate 3. The return current I3' will form a floor current I3" on the grounding plate 3 from the first grounding terminal G21 to the direction close to the first feeding terminal F21, that is, the same direction as the current I1 on the first radiation sub-branch 111. The return current I4' will form a floor current I4" on the grounding plate 3 from the second grounding terminal G22 to the direction close to the second feeding terminal F22, that is, the same direction as the current I2 on the second radiation sub-branch 112. In addition, the current I1 on the first radiation sub-branch 111 and the current I2 on the second radiation sub-branch 112 will also excite the reverse mirror current on the grounding plate 3, that is, the current I1 on the first radiation sub-branch 111 will excite the mirror current I1' on the grounding plate 3 in the reverse direction of the current I1, and the current I2 on the second radiation sub-branch 112 will excite the mirror current I2' on the grounding plate 3 in the reverse direction of the current I2. Thus, the aforementioned floor current I3" is opposite to the direction of the mirror current I1' and basically cancels each other out, and the aforementioned floor current I4" is also opposite to the direction of the mirror current I2' and basically cancels each other out.

[0047] Therefore, in general, when the first radiation branch 11 is excited by the first feed source 12, the first antenna unit 1 and the second antenna unit 2 as a whole mainly generate the current I12 coupled from the first radiation branch 11 to the ground, the return current I3' from the first ground terminal G21 of the second radiation branch 21 to the ground, and the return current I4' from the second ground terminal G22 of the third radiation branch 22 to the ground, which are roughly currents in the first polarization direction. Therefore, the resonance at this time presents the first polarization direction.

[0048] Therefore, it can also be seen that under the above structure of the present application, that is, at least when the electronic device 100 is in a preset state, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112. The second radiation branch 21 and the third radiation branch 22 of the second antenna unit 2 can effectively enhance the polarization in the first polarization direction.

[0049] See also Figure 3 , is a schematic diagram of current distribution when the second antenna unit 2 of the electronic device 100 in some embodiments of the present application is working. Among them, Figure 3 Specifically, at least when the electronic device 100 is in a preset state, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, the second radiation branch 21 of the second antenna unit 2 and the third radiation branch 22 are excited by the second feed source 23 to generate the overall current distribution diagram of the first antenna unit 1 and the second antenna unit 2, that is, Figure 1 The current distribution diagram of the second antenna unit 2 when working under the structure of the electronic device 100 shown in FIG. Figure 3 In order to better illustrate the current, Figure 1 Some of the numbers in are also omitted.

[0050] like Figure 3As shown, since the second signal terminal 231 and the third signal terminal 232 are used to output the second feed signal and the third feed signal respectively, the second feed signal and the third feed signal have a phase difference of 180°, and the second radiation branch 21 generates a current I5 from the first feed terminal F21 to the first ground terminal G21, and the third radiation branch 22 generates a current I6 from the second ground terminal G22 to the second feed terminal F22, and the directions of the current I5 and the current I6 are the same. At this time, the second radiation branch 21 and the third radiation branch 22 are mainly in a 1 / 2 wavelength mode as a whole. At the same time, the current I5 on the second radiation branch 21 will stimulate the first radiation sub-branch 111 to generate a reverse current I7, that is, the current I7 from the first free end of the first radiation sub-branch 111 to the feeding point F1, and the current I6 on the third radiation branch 22 will stimulate the second radiation sub-branch 112 to generate a reverse current I8. Since the current I5 and the current I6 have the same direction, the current I7 and the current I8, which are opposite to the current I5 and the current I6 respectively, are also the same direction currents. Therefore, Figure 3 As shown, at this time, the first radiation branch 11 as a whole generates a current in a direction from the first free end P11 to the second free end P12, and basically does not generate a current coupled to the ground.

[0051] In addition, the second radiation branch 21 and the third radiation branch 22 form a loop antenna, and the current I5 generated from the first feeding terminal F21 to the first ground terminal G21 on the second radiation branch 21 returns to the ground through the first ground terminal G21, and then forms a floor current I5' and then flows to the second ground terminal G22 of the third radiation branch 22 through the ground plate 3, thereby forming a current loop. In this case, the direction of the current returning to the ground through the first ground terminal G21 is substantially opposite to the direction of the current flowing from the ground plate 3 to the second ground terminal G22 of the third radiation branch 22, and they cancel each other out.

[0052] Thus, when the second radiating branch 21 and the third radiating branch 22 of the second antenna unit 2 are excited by the second feed source 23, the first antenna unit 1 and the second antenna unit 2 mainly present a current substantially perpendicular to the direction from the first radiating branch 11 to the ground. Thus, under the excitation of the second feed signal and the third feed signal, the second antenna unit 2 and the third radiating branch 22 respectively mainly generate a current along the second polarization direction, so that the resonance at this time presents the second polarization direction.

[0053] See also Figure 4, is a schematic diagram of the current distribution on the ground plane 3 when the first antenna unit 1 of the electronic device 100 in some embodiments of the present application is working. As mentioned above, when the first radiating branch 11 is excited by the first feed source 12, the first antenna unit 1 and the second antenna unit 2 as a whole mainly generate a current I12 coupled from the first radiating branch 11 to the ground, a return current I3' from the first ground terminal G21 of the second radiating branch 21 to the ground, and a return current I4' from the second ground terminal G22 of the third radiating branch 22 to the ground. These are roughly currents in the first polarization direction. Thus, as Figure 4 As shown, the main currents present on the ground plane 3 are also the current I12 coupled from the first radiation branch 11 to the ground, the return current I3' from the first ground terminal G21 of the second radiation branch 21 to the ground, and the return current I4' from the second ground terminal G22 of the third radiation branch 22 to the ground. These are roughly currents in the first polarization direction R1.

[0054] See also Figure 5 , is a schematic diagram of the current distribution on the ground plane 3 when the second antenna unit 2 of the electronic device 100 in some embodiments of the present application is working. As mentioned above, when the second radiating branch 21 and the third radiating branch 22 of the second antenna unit 2 are excited by the second feed source 23, the current I5 generated on the second radiating branch 21 from the first feed terminal F21 to the first ground terminal G21 returns to the ground through the first ground terminal G21, and then forms a floor current I5' and then flows through the ground plane 3 to the second ground terminal G22 of the third radiating branch 22. Figure 5 As shown, the main current present on the grounding plate 3 is the current in a direction parallel to the direction from the first grounding terminal G21 to the second grounding terminal G22, that is, the current is mainly roughly perpendicular to the direction from the aforementioned first radiation branch 11 to the ground. These are roughly the currents in the second polarization direction R2.

[0055] Therefore, from Figure 4 and Figure 5 It can also be seen from the current distribution of the ground plate 3 that the resonance of the first radiating branch 11 when excited by the first feed source 12, as well as the resonance of the second radiating branch 21 of the second antenna unit 2 and the third radiating branch 22 when excited by the second feed source 23 mainly present two basically vertical directions, and realize the same frequency orthogonal polarization, which can effectively avoid or greatly reduce the interference between the first antenna unit 1 and the second antenna unit 2.

[0056] In some embodiments, Figure 1-Figure 3As shown, the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22 are all long straight strips. The direction from the first radiation branch 11 to the ground is substantially perpendicular to the length direction of the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22, that is, in some embodiments, the first polarization direction may be a direction perpendicular to the length direction of the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22. The second polarization direction may be substantially a direction parallel to the length direction of the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22.

[0057] Among them, the first radiating branch 11, the second radiating branch 21 and the third radiating branch 22 are all long straight strips, and the length direction of the first radiating branch 11, the second radiating branch 21 and the third radiating branch 22 can be the extension direction of the longest side of the first radiating branch 11, the second radiating branch 21 and the third radiating branch 22.

[0058] In some embodiments, the first radiation branch 11 is mainly in an even mode under the excitation of the first feed source 12 , and the second radiation branch 21 and the third radiation branch 22 are in an odd mode under the excitation of the second feed source 23 .

[0059] In some embodiments, Figure 1 As shown in the figure, the feeding point F1 can be located in the middle position of the first radiating branch 11, the electrical lengths of the first radiating sub-branch 111 and the second radiating sub-branch 112 are equal and both equal to λ / 4, wherein λ is the wavelength corresponding to the preset frequency band, and the first radiating sub-branch 111 and the second radiating sub-branch 112 both resonate in the preset frequency band under the excitation of the first feeding signal, thereby realizing double resonance; the electrical lengths of the second radiating branch 21 and the third radiating branch 22 are both equal to λ / 4, and the second radiating branch 21 and the third radiating branch 22 both resonate in the preset frequency band under the excitation of the second feeding signal and the third feeding signal, thereby also realizing double resonance.

[0060] Among them, the aforementioned second radiation branch 21 and the third radiation branch 22 are mainly 1 / 2 wavelength modes as a whole, mainly because the electrical lengths of the second radiation branch 21 and the third radiation branch 22 are both equal to λ / 4, and the second radiation branch 21 and the third radiation branch 22 resonate in the preset frequency band under the excitation of the second feed signal and the third feed signal respectively. Since the directions of the currents flowing through the second radiation branch 21 and the third radiation branch 22 are the same, the second radiation branch 21 and the third radiation branch 22 can be regarded as 1 / 2 wavelength radiation branches as a whole, forming a 1 / 2 wavelength mode.

[0061] Thus, in the present application, the first radiation sub-branch 111 and the second radiation sub-branch 112 resonate in the preset frequency band under the excitation of the first feed signal, thereby realizing double resonance, and the second radiation branch 21 and the third radiation branch 22 resonate in the preset frequency band under the excitation of the second feed signal and the third feed signal respectively, thereby also realizing double resonance, which can effectively improve the radiation performance of the preset frequency band.

[0062] In some embodiments, at least when the electronic device 100 is in a preset state, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, and the first feeding end F21 of the second radiation branch 21 and the second feeding end F22 of the third radiation branch 22 are close to the feeding point F1, and the feeding point F1 is located between the projections of the first feeding end F21 and the second feeding end F22 on the first radiation branch 11.

[0063] That is, in some embodiments, the first feeding end F21 of the second radiating branch 21 and the second feeding end F22 of the third radiating branch 22 are close to the feeding point F1 on the first radiating branch 11, and the projections of the first feeding end F21 and the second feeding end F22 on the first radiating branch 11 are respectively located on both sides of the feeding point F1, that is, the feeding point F1 is located between the projections of the first feeding end F21 and the second feeding end F22 on the first radiating branch 11.

[0064] Furthermore, in some embodiments, the feed point F1 is approximately located in the middle of the first radiation branch 11, and the lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 into which the first radiation branch 11 is divided by the feed point F1 are approximately the same, and the lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 are approximately equal to the electrical lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112, so that the electrical lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 are approximately the same, and can resonate in the same frequency band at the same time. The first radiation sub-branch 111 and the second radiation sub-branch 112 are also approximately symmetrically distributed about the symmetry center line passing through the feed point F1.

[0065] Since the lengths of the second radiation branch 21 and the third radiation branch 22 are substantially equal to the electrical lengths of the second radiation branch 21 and the third radiation branch 22, and the lengths of the second radiation branch 21 and the third radiation branch 22 are equal, the second radiation branch 21 and the third radiation branch 22 are also substantially symmetrically distributed about the symmetric center line of the midpoint of the line connecting the first feeding end F21 of the second radiation branch 21 and the second feeding end F22 of the third radiation branch 22.

[0066] In some embodiments, the first feeding end F21 of the second radiation branch 21 and the second feeding end F22 of the third radiation branch 22 are close to the feeding point F1 on the first radiation branch 11, and the projection of the midpoint of the line connecting the first feeding end F21 of the second radiation branch 21 and the second feeding end F22 of the third radiation branch 22 on the first radiation branch 11 can roughly coincide with the feeding point F1. Thus, the symmetric center line of the first radiation sub-branch 111 and the second radiation sub-branch 112 roughly coincides with the symmetric center line of the second radiation branch 21 and the third radiation branch 22.

[0067] Therefore, through this structure, in addition, the first feeding end F21 of the second radiation branch 21 and the second feeding end F22 of the third radiation branch 22 are as close as possible, then the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 11, and the projection of the second radiation branch 21 on the first radiation sub-branch 111 is roughly coincident with the first radiation sub-branch 11, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, and the projection of the third radiation branch 22 on the second radiation sub-branch 112 is roughly coincident with the second radiation sub-branch 112. When the first radiation branch 11 is excited by the first feed source 12, it can more effectively present the polarization in the first polarization direction, and when the second radiation branch 21 and the third radiation branch 22 are excited by the second feed source 23, they can more effectively present the polarization in the second polarization direction. Moreover, through this structure, the size of the overall antenna structure is small, which is conducive to layout in a small clearance area.

[0068] In some embodiments, the feed point F1 is located at the middle position of the first radiation branch 11, but may not be strictly located at the middle position. The lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 are approximately the same but not strictly the same. For example, the feed point F1 may deviate from the middle position in a strict sense by a certain distance, for example, by a distance less than λ / 8. The length difference between the first radiation sub-branch 111 and the second radiation sub-branch 112 can be considered the same within a preset range. For example, the lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 can be slightly different, but basically close, and can basically resonate in the same frequency band. Similarly, the second radiation branch 21 and the third radiation branch 22 are not strictly the same in length. The length difference between the second radiation branch 21 and the third radiation branch 22 can be considered the same within a predetermined range. For example, the lengths of the second radiation branch 21 and the third radiation branch 22 can be basically close, and can basically resonate in the same frequency band.

[0069] In some embodiments, Figure 1 As shown, the electronic device 100 is a tablet electronic device, the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22 are arranged at the same target end D1 of the electronic device 100, and the preset state includes any state.

[0070] That is, in some embodiments, the electronic device 100 is a tablet electronic device, and the electronic device 100 satisfies in any state that the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, that is, the structural position relationship between the first antenna unit 1 and the second antenna unit 2 is a fixed structural position relationship.

[0071] Among them, the aforementioned Figure 2-Figure 5 All of them are schematic diagrams of current distribution when the electronic device 100 is a tablet electronic device.

[0072] Among them, Figure 1-Figure 3 As shown, the first radiating branch 11, the second radiating branch 21 and the third radiating branch 22 are all long straight strips, and the first radiating branch 11, the second radiating branch 21 and the third radiating branch 22 are all parallel to the target end D1, and the second radiating branch 21 and the third radiating branch 22 are arranged at intervals along a preset direction, and the preset direction is the length direction of the second radiating branch 21 and the third radiating branch 22.

[0073] Among them, in the present application, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, which means that the second radiation branch 21 is adjacent to the first radiation sub-branch 111, and is parallel to each other along the length direction of the second radiation branch 21 and the first radiation sub-branch 111, and is spaced apart from each other along a direction perpendicular to the length direction of the second radiation branch 21 and the first radiation sub-branch 111. The third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, which means that the third radiation branch 22 is adjacent to the second radiation sub-branch 112, and is parallel to each other along the length direction of the third radiation branch 22 and the second radiation sub-branch 112, and is spaced apart from each other along a direction perpendicular to the length direction of the third radiation branch 22 and the second radiation sub-branch 112.

[0074] Thus, in some embodiments, since the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, and the second radiation branch 21 and the third radiation branch 22 are arranged at intervals along a preset direction, and the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22 are all parallel to the target end D1. Therefore, in some embodiments, the second radiation branch 21 and the first radiation sub-branch 111 are arranged at intervals along a direction perpendicular to the end surface of the target end D1, the third radiation branch 22 and the second radiation sub-branch 112 are also arranged at intervals along a direction perpendicular to the end surface of the target end D1, and the third radiation branch 22 and the second radiation sub-branch 112 are located on the same side of the first radiation branch 11.

[0075] Obviously, in some embodiments, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, which means that the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and does not need to be parallel to the end at which it is arranged.

[0076] Among them, the length directions of the first radiating branch 11 , the second radiating branch 21 and the third radiating branch 22 in the present application all refer to the extension direction of the longest sides of the first radiating branch 11 , the second radiating branch 21 and the third radiating branch 22 .

[0077] Obviously, in some other embodiments, the second radiating branch 21 and the third radiating branch 22 may not be arranged in a preset direction, i.e., the length direction. For example, the second radiating branch 21 and the third radiating branch 22 may be respectively located on both sides of the first radiating branch 11. It is only necessary that the second radiating branch 21 is adjacent to and parallel to the first radiating sub-branch 111, and the third radiating branch 22 is adjacent to and parallel to the second radiating sub-branch 112.

[0078] In some embodiments, Figure 1-Figure 3 As shown, the projections of the first radiation sub-branch 111 of the first radiation branch 11 and the second radiation branch 21 on the target end D1 at least partially overlap, and the projections of the second radiation sub-branch 112 of the first radiation branch 11 and the third radiation branch 22 on the target end D1 at least partially overlap.

[0079] Thus, the projections of the first radiation sub-branch 111 of the first radiation branch 11 and the second radiation branch 21 on the target end D1 at least partially overlap, and the projections of the second radiation sub-branch 112 of the first radiation branch 11 and the third radiation branch 22 on the target end D1 at least partially overlap, which can ensure that when the first radiation branch 11 is excited by the first feed source 12, it further couples and excites the second radiation branch 21 and the third radiation branch 22 to generate corresponding currents, and ensure that when the second radiation branch 21 and the third radiation branch 22 are excited by the second feed source 23, they further couple the first radiation sub-branch 111 and the second radiation sub-branch 112 of the first radiation branch 11 to generate corresponding currents, thereby better realizing the aforementioned resonance in the first polarization direction and the resonance in the second polarization direction.

[0080] In some embodiments, as described above, when the first feeding end F21 of the second radiating branch 21 and the second feeding end F22 of the third radiating branch 22 are close to the feeding point F1 on the first radiating branch 11, and the projection of the midpoint of the line connecting the first feeding end F21 of the second radiating branch 21 and the second feeding end F22 of the third radiating branch 22 on the first radiating branch 11 can roughly coincide with the feeding point F1, the projection of the second radiating branch 21 on the first radiating sub-branch 111 roughly coincides with the first radiating sub-branch 11, that is, most of it coincides, the third radiating branch 22 is adjacent to and parallel to the second radiating sub-branch 112, and the projection of the third radiating branch 22 on the second radiating sub-branch 112 roughly coincides with the second radiating sub-branch 112, that is, most of it coincides. Thus, when the first radiation branch 11 is excited by the first feed source 12, it can more effectively present polarization in the first polarization direction, and when the second radiation branch 21 and the third radiation branch 22 are excited by the second feed source 23, they can more effectively present polarization in the second polarization direction. Moreover, through this structure, the size of the overall antenna structure is small, which is conducive to deployment in a small clearance area.

[0081] In some embodiments, Figure 1 As shown in the figures, the electronic device 100 includes a top end D11, a bottom end D12, and two side ends D13, D14, and the target end D1 can be any one of the top end D11, the bottom end D12, and the two side ends D13, D14.

[0082] That is, the first radiation branch 11 , the second radiation branch 21 and the third radiation branch 22 can be simultaneously disposed on any one of the top end D11 , the bottom end D12 and the two side ends D13 and D14 of the electronic device 100 .

[0083] Among them, the directional terms such as "top" and "bottom" used in the embodiments of the present application to describe the electronic device 100 are mainly explained based on the orientation of the electronic device 100 when the user holds it in hand. The position toward the top side of the electronic device 100 is the "top", and the position toward the bottom side of the electronic device 100 is the "bottom". It does not indicate or imply 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 on the orientation of the electronic device 100 in actual application scenarios. In some embodiments, the bottom end of the electronic device 100 is the end where the headphone jack and the USB port are provided, and the top of the electronic device 100 is the other end opposite to the end where the headphone jack and the USB port are provided, and may also refer to the end where a camera, a receiver, etc. are provided.

[0084] See also Figure 6 , is a schematic diagram of the return loss and system total efficiency of the first antenna unit 1 and the second antenna unit 2 of the electronic device 100 in some embodiments of the present application. Figure 6 Can be Figure 1 The structure of the electronic device 100 shown is a schematic diagram of the return loss of the first antenna unit 1 and the second antenna unit 2 and the total system efficiency obtained by simulation test.

[0085] in, Figure 6 Schematically shows the return loss curve S11 - 1 and the system total efficiency curve St1 of the first antenna unit 1 , and the return loss curve S11 - 2 and the system total efficiency curve St2 of the second antenna unit 2 .

[0086] Generally speaking, the trough of the return loss curve is also the peak of the system total efficiency curve, and the corresponding frequency is the resonant frequency of the operating frequency band.

[0087] like Figure 6 As shown, at the resonant frequency of the preset frequency band, the return loss of the first antenna unit 1 is approximately -8dB, and the total system efficiency is approximately -2dB, while the return loss of the second antenna unit 2 is also approximately -8dB, and the total system efficiency is approximately 2dB.

[0088] It can be seen that the return losses of the first antenna unit 1 and the second antenna unit 2 are both low, while the overall system efficiency is both high.

[0089] See also Figure 7 , is a schematic diagram of return loss and isolation of the first antenna unit 1 and the second antenna unit 2 of the electronic device 100 in some embodiments of the present application. Figure 7 It can also be Figure 1The structure of the electronic device 100 shown is a schematic diagram of the return loss of the first antenna unit 1 and the second antenna unit 2 and the total system efficiency obtained by simulation test.

[0090] in, Figure 7 Schematically shows a return loss curve S11 - 1 of the first antenna unit 1 , a return loss curve S11 - 2 of the second antenna unit 2 , and an isolation curve Sg1 between the first antenna unit 1 and the second antenna unit 2 .

[0091] Generally speaking, the higher the amplitude corresponding to the isolation curve Sg1, the lower the isolation between the first antenna unit 1 and the second antenna unit 2, and the lower the amplitude corresponding to the isolation curve Sg1, the higher the isolation between the first antenna unit 1 and the second antenna unit 2.

[0092] like Figure 7 As shown, at the resonant frequency of the preset frequency band, the return loss of the first antenna unit 1 is approximately -8dB, and the return loss of the second antenna unit 2 is also approximately -8dB, and the isolation between the first antenna unit 1 and the second antenna unit 2 is approximately -58dB. Obviously, it is shown that under the structure of the electronic device 100 of the present application, the isolation between the first antenna unit 1 and the second antenna unit 2 is already very high, and the mutual interference is already very low, which can meet the isolation requirements.

[0093] See also Figure 8 , is a schematic diagram of an envelope correlation coefficient (ECC) curve of the first antenna unit 1 and the second antenna unit 2 of the electronic device 100 in some embodiments of the present application. Among them, Figure 8 It can also be Figure 1 A schematic diagram of envelope correlation coefficients of the first antenna unit 1 and the second antenna unit 2 obtained by simulation testing of the structure of the electronic device 100 shown.

[0094] The envelope correlation coefficient (ECC) represents the similarity of the envelope, that is, the radiation pattern, between two antennas with the same frequency. The lower the envelope correlation coefficient, the less similar the radiation patterns of the two antennas with the same frequency are, that is, the higher the isolation is.

[0095] The figure shows the envelope correlation coefficient Sb1 of the first antenna unit 1 and the second antenna unit 2. Figure 8It can be seen that under the structure of the electronic device 100 of the present application, at the corresponding resonant frequency, the envelope correlation coefficient of the first antenna unit 1 and the second antenna unit 2 is much less than 0.1, which is already very low. Therefore, the envelope correlation coefficient also reflects that the first antenna unit 1 and the second antenna unit 2 of the electronic device 100 of the present application, since the polarization directions of the two are basically vertical, the radiation patterns are completely dissimilar, so the isolation is very high and the interference between them is very small.

[0096] Wherein, in some embodiments, Figure 6-Figure 8 As shown, the preset frequency band in the present application can be roughly a medium-high frequency band in the range of 2 GHz-3 GHz, and the resonant frequency is roughly located near the range of 2.3 to 2.5 GHz.

[0097] Obviously, Figure 6-Figure 8 This is just an example. The preset frequency band may be any other frequency band, for example, low frequency, medium frequency, etc. By utilizing the structure of the present application, good same-frequency isolation can be achieved.

[0098] See also Fig. 9 , is another plan view of the electronic device 100 in some embodiments of the present application. In some embodiments, as Fig. 9 As shown, the electronic device 100 is also a tablet electronic device, wherein the first radiation sub-branch 111 of the first radiation branch 11 and the second radiation branch 21 are arranged at the first target end D1 of the electronic device 100, the second radiation sub-branch 112 of the first radiation branch 11 and the third radiation branch 22 are arranged at the second target end D2 of the electronic device 100, the first target end D1 and the second target end D2 are adjacent ends, and the preset state includes any state.

[0099] Right now, Fig. 9 With the aforementioned Figure 1 The difference is that the first radiation sub-branch 111 and the second radiation sub-branch 112 of the first radiation branch 11 are respectively arranged at two adjacent ends of the electronic device 100, and the second radiation sub-branch 112 and the third radiation branch 22 are also respectively arranged at the two adjacent ends of the electronic device 100.

[0100] Similarly, the second radiation sub-branch 112 and the third radiation sub-branch 22 are still adjacent to and parallel to the first radiation sub-branch 111 and the second radiation sub-branch 112 respectively.

[0101] like Fig. 9As shown, the first radiation branch 11 is bent, the second radiation branch 21 and the third radiation branch 22 are long straight strips, the first radiation sub-branch 111 of the first radiation branch 11 and the second radiation branch 21 are parallel to the first target end D1, and the second radiation sub-branch 112 of the first radiation branch 11 and the third radiation branch 22 are parallel to the second target end D2.

[0102] That is, in some embodiments, the first radiation branch node 11 and the second radiation sub-branch node 112 and the third radiation branch node 22 are arranged at a vertex angle of the electronic device 100, and the first radiation sub-branch node 111 and the second radiation sub-branch node 112 of the first radiation branch node 11, and the second radiation sub-branch node 112 and the third radiation branch node 22 are respectively parallel to the two adjacent ends at the vertex angle.

[0103] Among them, the parallelism of A and B in this application refers to approximately parallelism, not parallelism in a strict sense. The angle difference between A and B can also be regarded as parallel within a preset angle range. For example, the angle difference between A and B can also be regarded as parallel within a range of 15°.

[0104] In some embodiments, Fig. 9 As shown, the projections of the first radiation sub-branch 111 of the first radiation branch 11 and the second radiation branch 21 on the first target end D1 at least partially overlap, and the projections of the second radiation sub-branch 112 of the first radiation branch 11 and the third radiation branch 22 on the second target end D2 at least partially overlap. Thus, similarly, it is possible to ensure that when the first radiation branch 11 is excited by the first feed source 12, it further couples and excites the second radiation branch 21 and the third radiation branch 22 to generate corresponding currents, and to ensure that when the second radiation branch 21 and the third radiation branch 22 are excited by the second feed source 23, they further couple the first radiation sub-branch 111 and the second radiation sub-branch 112 of the first radiation branch 11 to generate corresponding currents, so that the polarization in the first polarization direction and the polarization in the second polarization direction mentioned above can be better realized.

[0105] Please refer to Fig.10 , is another current distribution diagram when the first antenna unit 1 of the electronic device 100 in some embodiments of the present application is working. Fig.10 Can Fig. 9 The first radiation branch 11 of the first antenna unit 1 in the electronic device 100 shown in the figure generates a current distribution diagram of the first antenna unit 1 and the second antenna unit 2 under the excitation of the first feed source 12. In order to illustrate the current more clearly, Fig.10 Some components and reference numerals are omitted.

[0106] like Fig.10 As shown, the first radiation branch 11 also generates a current I1 from the first free end P11 to the feeding point F1 and a current I2 from the second free end P12 to the feeding point F1 under the stimulation of the first signal end 121 of the first feed source 12. That is, currents in opposite directions are generated on the first radiation sub-branch 111 and the second radiation sub-branch 112. In addition, the two currents I1 in opposite directions are combined to form a current I12 coupled from the feeding point F1 of the first radiation branch 11 to the ground.

[0107] In some embodiments, the feeding point F1 is located in the middle of the first radiation branch 11, and the electrical lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 are equal, so that the feeding point F1 is approximately located at a position corresponding to the connection between two adjacent ends, so that, as shown in the figure, the current I12 coupled from the feeding point F1 of the first radiation branch 11 to the ground is approximately a current in a direction having the same angle with the first target end D1 and the second target end D2, that is, a 45° angle. That is, approximately along the diagonal direction of the first target end D1 and the second target end D2.

[0108] At the same time, similarly, the first radiation sub-branch 111 also excites the second radiation branch 21 adjacent to and parallel to it to generate a current I3 from the first feeding terminal F21 to the first ground terminal G21, and the second radiation sub-branch 112 also excites the third radiation branch 22 adjacent to and parallel to it to generate a current I4 from the second feeding terminal F22 to the second ground terminal G22, and after the current I3 and the current I4 return to the ground through the first ground terminal G21 and the second ground terminal G22 respectively, they respectively form a return-to-ground current I3' perpendicular to the first target end D1 and a return-to-ground current I4' perpendicular to the second target end D2, and the vector and direction of the return-to-ground current I3' and the return-to-ground current I4' are the same as the current I12 coupled from the feeding point F1 of the first radiation branch 11 to the ground, therefore, it is equivalent to the current coupled from the feeding point F1 of the first radiation branch 11 to the ground direction, that is, the first polarization direction R1.

[0109] Therefore, when the aforementioned first radiation branch 1 is excited by the first feed source 12, it generates a current along the first polarization direction and presents polarization in the first polarization direction, and may also include generating an equivalent current along the first polarization direction as a whole and presenting polarization in the first polarization direction.

[0110] At this time, the direction of the current from the feeding point F1 of the first radiating branch 11 to the ground, which is roughly the diagonal direction of the first target end D1 and the second target end D2, is the first polarization direction R1. Therefore, when the first radiating branch 11 is excited by the first signal end 121 of the first feed source 12, the first antenna unit 1 and the second antenna unit 2 as a whole still mainly carry current in the first polarization direction and present polarization in the first polarization direction.

[0111] See also Fig.11 , is another current distribution diagram when the second antenna unit 2 of the electronic device 100 in some embodiments of the present application is working. Fig.11 Can Fig. 9 The second radiation branch 21 and the third radiation branch 22 of the second antenna unit 2 in the electronic device 100 shown in the figure are the overall current distribution diagram of the first antenna unit 1 and the second antenna unit 2 generated by the excitation of the second feed source 23. In order to more clearly illustrate the current, Fig.11 Several components and reference numerals are also omitted.

[0112] like Fig.11 As shown, since the second signal terminal 231 and the third signal terminal 232 are used to output the second feed signal and the third feed signal respectively, the second feed signal and the third feed signal have a phase difference of 180°, and the second radiation branch 21 generates a current I5 from the first feed terminal F21 to the first ground terminal G21, and the third radiation branch 22 generates a current I6 from the second ground terminal G22 to the second feed terminal F22, and the directions of the current I5 and the current I6 are the same. At this time, the second radiation branch 21 and the third radiation branch 22 are mainly in a 1 / 2 wavelength mode as a whole. At the same time, the current I5 on the second radiation branch 21 will stimulate the first radiation sub-branch 111 to generate a reverse current I7, that is, the current I7 from the first free end of the first radiation sub-branch 111 to the feeding point F1, and the current I6 on the third radiation branch 22 will stimulate the second radiation sub-branch 112 to generate a reverse current I8. Since the overall directions of the currents I5 and I6 are still the same, that is, they are transmitted along a path as a whole, but the path direction is curved, the currents I7 and I8, which are respectively opposite to the currents I5 and I6, are also currents in the same direction. Therefore, Fig.11 As shown, at this time, the first radiation branch 11 as a whole generates a current in a direction from the first free end P11 to the second free end P12, and basically does not generate a current coupled to the ground.

[0113] In addition, the second radiation branch 21 and the third radiation branch 22 form a loop antenna. The current I5 generated on the second radiation branch 21 from the first feeding terminal F21 to the first grounding terminal G21 returns to the ground through the first grounding terminal G21, and then forms a floor current I5'. The direction of the floor current I5' is parallel and opposite to the current I5, and is transmitted toward the position of the first feeding terminal F21. After reaching the position roughly corresponding to the first feeding terminal F21, it is then transmitted in a direction roughly parallel and opposite to the current I6, that is, Fig.11 The floor current I6' in the grounding circuit then flows to the second ground terminal G22 of the third radiation branch 22 to form a current loop.

[0114] At this time, the directions of the vector sum of the floor current I5' and the floor current I6', as well as the vector sum of the current I5 on the second radiation branch 21 and the current I6 on the third radiation branch 22, etc. are roughly perpendicular to the direction of the current from the feeding point F1 of the first radiation branch 11 to the ground, that is, the diagonal direction of the first target end D1 and the second target end D2, which is the second polarization direction R2.

[0115] At this time, when the second radiating branch 21 and the third radiating branch 22 of the second antenna unit 2 are excited by the second feed source 23, the first antenna unit 1 and the second antenna unit 2 mainly present a current substantially perpendicular to the direction from the first radiating branch 11 to the ground. Thus, the second antenna unit 2 and the third radiating branch 22, under the excitation of the second feed signal and the third feed signal respectively, mainly generate a current equivalent to that along the second polarization direction, and present polarization in the second polarization direction.

[0116] Therefore, the aforementioned second radiation branch 21 and the third radiation branch 22 generate a current along the second polarization direction under the excitation of the second feed signal and the third feed signal respectively, and present a polarization in the second polarization direction, which may also include generating a current equivalent to a current along the second polarization direction as a whole and presenting a polarization in the second polarization direction.

[0117] in, Fig.10 and Fig.11 The current distribution diagram shown is similar to the above Figure 2 and Figure 3 The current distribution diagram shown in FIG. 1 is only different in the positions of the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22. For more details, please refer to the aforementioned Figure 2 and Figure 3 Description.

[0118] As mentioned above, the electronic device includes a top end D11, a bottom end D12, and two side ends D13 and D14. The first target end D1 can be the top end D11 or the bottom end D12, and the second target end D2 can be one of the side ends; or the first target end D1 can be one of the side ends, and the second target end D2 can be the top end D11 or the bottom end D12.

[0119] Among them, Figure 1-Figure 3 as well as Figure 9-11 As shown in the figure, the electronic device 100 also includes a mainboard 4, the first feed source 12 and the second feed source 23 are arranged on the mainboard 4, the feeding point F1 of the first radiation branch 11 is connected to the first feed source 12 through the first feeding connector J1, that is, connected to the first signal terminal 121 of the first feed source 12, the first feeding terminal F21 of the second radiation branch 21 is connected to the second signal terminal 231 of the second feed source 23 through the second feeding connector J2, and the second feeding terminal F22 of the third radiation branch 22 is connected to the third signal terminal 232 of the second feed source 23 through the third feeding connector J3. Wherein, in some embodiments, as Figure 1-Figure 3 as well as Figure 9-11 As shown in the figure, the second radiation branch 21 and the third radiation branch 22 are closer to the main board 4 than the first radiation branch 11 , and the first feeding connector J1 passes through the gap between the second radiation branch 21 and the third radiation branch 22 .

[0120] That is, in some embodiments, the first feed source 12 and the second feed source 23 are connected to corresponding feed points or feed ends through corresponding feed connectors. Since the second radiation branch 21 and the third radiation branch 22 are closer to the main board 4 than the first radiation branch 11, the first feed connector J1 can utilize the gap between the second radiation branch 21 and the third radiation branch 22 to connect to the first feed source 12 located on the main board 4, which is conducive to saving space.

[0121] In some embodiments, the first feed connector J1, the second feed connector J2 and the third feed connector J3 may be feed springs. Obviously, in other embodiments, the first feed connector J1, the second feed connector J2 and the third feed connector J3 may also be electrical connectors such as conductive wires and flexible circuit boards.

[0122] As mentioned above, the first feed source 12 is connected to the feeding point F1 of the first radiation branch 11 through the matching unit M1. Therefore, specifically, the first feed source 12 and the matching unit M1 can be both arranged on the main board 4 and connected through a conductive line, etc., and the feed connector J1 can be specifically connected between the matching unit M1 and the feeding point F1 of the first radiation branch 11 to achieve the connection between the first feed source 12 and the feeding point F1.

[0123] Among them, Figure 1-Figure 3 as well as Figure 9-11 As shown in the figure, one of the signal ends of the second feed source 23 is also connected to the corresponding feed end through the matching unit M2, that is, the second antenna unit 2 also includes the matching unit M2. Figure 1-Figure 3 as well as Figure 9-11 As shown in the figure, the third signal terminal 232 of the second feed source 23 is also connected to the corresponding second feed terminal F22 through a matching unit M2. The matching unit M2 also includes a plurality of matching elements for implementing impedance matching adjustment to improve radiation performance.

[0124] Among them, similarly, the second feed source 23 and the matching unit M2 can both be set on the main board 4 and connected by conductive lines, etc., and the feed connector J3 can specifically be connected between the matching unit M2 and the second feed terminal F22 to achieve the connection between the second feed source 23 and the second feed terminal F22.

[0125] In some embodiments, the matching unit M1 and the matching unit M2 may be equivalent to a certain electrical length when performing impedance matching adjustment. The electrical lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 are equal and both equal to λ / 4, or the electrical lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 are both equal to λ / 4 with the further cooperation of the matching unit M1. The electrical lengths of the second radiation branch 21 and the third radiation branch 22 are both equal to λ / 4, or the electrical lengths of the second radiation branch 21 and the third radiation branch 22 are both equal to λ / 4 with the further cooperation of the matching unit M1.

[0126] Obviously, in some embodiments, the electrical lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 are equal and both equal to λ / 4, or the electrical lengths of the first radiation sub-branch 111 and the second radiation sub-branch 112 themselves are equal to λ / 4. The electrical lengths of the second radiation branch 21 and the third radiation branch 22 are both equal to λ / 4, or the electrical lengths of the second radiation branch 21 and the third radiation branch 22 themselves are both equal to λ / 4.

[0127] See also Fig.12 , is another schematic plan view of the electronic device 100 in some embodiments of the present application. In some embodiments, the electronic device 100 is a foldable electronic device, such as Fig.12 As shown, the electronic device 100 includes a first main body portion 101, a second main body portion 102 and a rotating shaft 103, wherein the rotating shaft 103 is connected between the first main body portion 101 and the second main body portion 102, wherein the first main body portion 101 and the second main body portion 102 are rotatably connected via the rotating shaft 103; the first radiating branch 11 is arranged at the first end 1D of the first main body portion 101, the second radiating branch 21 and the third radiating branch 22 are arranged at the second end 2D of the second main body portion 102, and the first end 1D and the second end 2D are in the same direction at least when the electronic device 100 is in a folded state, and the preset state includes a folded state.

[0128] That is, in some embodiments, the electronic device 100 is a foldable electronic device, and the preset state includes a folded state. When the electronic device 100 is in the folded state, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, and the aforementioned Figure 1-Figure 3 or Figure 9-11 The structure shown can realize polarization in two vertical directions, and can still achieve good isolation between the first antenna unit 1 and the second antenna unit 2.

[0129] Among them, the first radiation branch 11 can be arranged at the corresponding position of the first end 1D of the first main body 101, and the second radiation branch 21 and the third radiation branch 22 can be arranged at the corresponding position of the second end 2D of the second main body 102 by predetermining that when the electronic device 100 is in a folded state, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112, and the first radiation branch 11 is arranged at the first end 1D of the first main body 101, and the second radiation branch 21 and the third radiation branch 22 are arranged at the second end 2D of the second main body 102.

[0130] In some embodiments, Fig.12As shown, the first radiating branch 11, the second radiating branch 21 and the third radiating branch 23 are all straight strips, and the first radiating branch 11 is parallel to the first end 1D, the second radiating branch 21 and the third radiating branch 22 are parallel to the second end 2D and are arranged at intervals along a preset direction, and the preset direction is the length direction of the second radiating branch 21 and the third radiating branch 22.

[0131] In some embodiments, when the electronic device 100 is in the preset state, that is, when the electronic device 100 is in the folded state, the projection of the first radiation sub-branch 111 of the first radiation branch 11 on the first end 1D is at least partially opposite to the projection of the second radiation branch on the second end, and the projection of the second radiation sub-branch of the first radiation branch on the first end is at least partially opposite to the projection of the third radiation branch on the second end. Thus, it is possible to ensure that when the electronic device 100 is in the folded state, and the first radiation branch 11 is stimulated by the first feed source 12, it further couples and stimulates the second radiation branch 21 and the third radiation branch 22 to generate corresponding currents, and ensures that when the second radiation branch 21 and the third radiation branch 22 are stimulated by the second feed source 23, it further couples the first radiation sub-branch 111 and the second radiation sub-branch 112 of the first radiation branch 11 to generate corresponding currents, so that the resonance in the first polarization direction and the resonance in the second polarization direction mentioned above can be better achieved.

[0132] In some embodiments, the first main body portion 101 and the second main body portion 102 both include a top end 11D, a bottom end 12D, and a side end 13D away from the rotation axis 103, and the first end 1D and the second end 2D are each one of the top end 11D, the bottom end 12D, and the side end 13D.

[0133] That is, when the first end 1D is the top 11D of the first body portion 101, the second end 2D is also the top 11D of the second body portion 102, when the first end 1D is the side 13D of the first body portion 101, the second end 2D is also the side 13D of the second body portion 102, etc. Thus, it can be ensured that when the electronic device 100 is in a folded state, the first end 1D and the second end 2D are oriented in the same direction, and the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112.

[0134] in, Fig.12The first end portion 1D is shown as the top end 11D of the first main body portion 101, and the second end portion 2D is also shown as the top end 11D of the second main body portion 102. Fig.12 When the electronic device 100 is in a folded state, the first antenna unit 1 and the second antenna unit 2 substantially form the aforementioned Figure 1-Figure 3 The structure shown.

[0135] See also Fig.13 , is another schematic plan view of the electronic device 100 in some embodiments of the present application. Fig.13 As shown, when the first end portion 1D is the side end 13D of the first body portion 101 away from the rotation axis 103 , the second end portion 2D is also the side end 13D of the second body portion 102 away from the rotation axis 103 .

[0136] Thus, when the electronic device 100 is in a folded state, the orientations of the first end 1D and the second end 2D remain the same, so that the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111 , and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112 .

[0137] See also Fig.14 , is another schematic diagram of return loss and isolation of the first antenna unit 1 and the second antenna unit 2 of the electronic device 100 in some embodiments of the present application. Fig.14 It can also be Fig.12 or Fig.13 The structure of the electronic device 100 shown is a schematic diagram of the return loss of the first antenna unit 1 and the second antenna unit 2 and the total system efficiency obtained by simulation test.

[0138] in, Fig.14 Schematically shows a return loss curve S11 - 3 of the first antenna unit 1 , a return loss curve S11 - 4 of the second antenna unit 2 , and an isolation curve Sg2 between the first antenna unit 1 and the second antenna unit 2 .

[0139] As mentioned above, generally speaking, the higher the amplitude corresponding to the isolation curve, the lower the isolation between the first antenna unit 1 and the second antenna unit 2, and the lower the amplitude corresponding to the isolation curve, the higher the isolation between the first antenna unit 1 and the second antenna unit 2.

[0140] like Fig.14As shown, at the resonant frequency of the preset frequency band, the return loss of the first antenna unit 1 is approximately -10dB, and the return loss of the second antenna unit 2 is also approximately -10dB, and the isolation between the first antenna unit 1 and the second antenna unit 2 is approximately -39dB, which is also a very small value. Obviously, in the present application, Fig.12 as well as Fig.13 Under the structure of the electronic device 100 shown in the figure, when the electronic device 100 is in a folded state, the isolation between the first antenna unit 1 and the second antenna unit 2 is also very high, and the mutual interference is already very low, which can meet the isolation requirement.

[0141] Among them, Fig.12 and Fig.13 As shown, when the electronic device is a foldable electronic device, the grounding plate 3 of the electronic device 100 may include a first grounding plate 31 and a second grounding plate 32, and the main board 4 may include a first main board 41 and a second main board 42, wherein the first grounding plate 31 and the first main board 41 are located in the first main body portion 101, and the second grounding plate 32 and the second main board 42 are located in the second main body portion 102.

[0142] Wherein, when the electronic device is a foldable electronic device, the first feed source 12 is arranged on the first main board 41, the second feed source 23 is arranged on the second main board 42, and the first grounding terminal G21 and the second grounding terminal G22 are connected to the second grounding plate 32 for grounding.

[0143] In some embodiments, the ground plate 3 may be a middle frame. When the electronic device 100 is a foldable electronic device, the first ground plate 31 and the second ground plate 32 are two middle frames respectively located in the first body portion 101 and the second body portion 102. The middle frame serves as the whole ground of the electronic device 100 and provides a ground potential.

[0144] In some embodiments, the grounding plate 3 may also be the grounding layer of the main board 4. When the electronic device 100 is a foldable electronic device, the first grounding plate 31 and the second grounding plate 32 are grounding layers of the first main board 41 located in the first body portion 101 and the second main board 42 located in the second body portion 102, respectively. The grounding layer of the main board 4 may be connected to the middle frame to provide a ground potential.

[0145] See also Fig.15 , is another schematic diagram of current distribution on the ground plane 3 when the first antenna unit 1 of the electronic device 100 in some embodiments of the present application is working. Fig.15The current distribution diagram is specifically a current distribution diagram when the electronic device 100 is a foldable electronic device and is in a folded state, and specifically is Fig.12 The electronic device 100 shown is a current distribution diagram under an example structure.

[0146] Wherein, when the first radiation branch 11 is excited by the first feed source 12, as Fig.15 As shown, the main currents present on the grounding plate 3 are also the current I12 coupled from the first radiation branch 11 to the ground, the return current I3' from the first grounding terminal G21 of the second radiation branch 21 to the ground, and the return current I4' from the second grounding terminal G22 of the third radiation branch 22 to the ground. These are roughly currents in the first polarization direction, that is, currents in a direction perpendicular to the first end 1D or the second end 2D.

[0147] See also Fig.16 , is another schematic diagram of current distribution on the ground plane 3 when the second antenna unit 2 of the electronic device 100 in some embodiments of the present application is working. Fig.16 The current distribution diagram is also specifically a current distribution diagram when the electronic device 100 is a foldable electronic device and is in a folded state, and is specifically a current distribution diagram of Fig.12 The electronic device 100 shown is a current distribution diagram under an example structure.

[0148] like Fig.16 As shown, the current mainly present on the ground plate 3 is the current in the direction parallel to the direction from the first ground terminal G21 to the second ground terminal G22, that is, the current mainly perpendicular to the direction from the first radiation branch 11 to the ground, that is, Fig.16 The current is shown in a direction parallel to the first end 1D or the second end 2D.

[0149] When the electronic device 100 is a foldable electronic device, Fig.15 and Fig.16 The ground plate 3 in the embodiment may specifically be the second ground plate 32 .

[0150] Therefore, from Fig.15 and Fig.16It can also be seen from the current distribution of the ground plate 3 that when the electronic device 100 is a foldable electronic device and the electronic device 100 is in a folded state, the resonance generated by the first radiating branch 11 under the excitation of the first feed source 12, the second radiating branch 21 of the second antenna unit 2, and the third radiating branch 22 under the excitation of the second feed source 23 mainly present two basically vertical directions, and realize the same frequency orthogonal polarization, which can effectively avoid or greatly reduce the interference between the first antenna unit 1 and the second antenna unit 2.

[0151] Among them, in the present application, being parallel to a certain end portion specifically refers to being parallel to the end face of the end portion, and being perpendicular to a certain end portion specifically refers to being perpendicular to the end face of the end portion.

[0152] See also Fig.17 , are other plan views of the electronic device 100 in some embodiments of the present application. Fig.17 As shown, similarly, the electronic device 100 is a foldable electronic device, and the electronic device 100 includes a first main body portion 101, a second main body portion 102 and a hinge 103, and the hinge 103 is connected between the first main body portion 101 and the second main body portion 102, wherein the first main body portion 101 and the second main body portion 102 are rotatably connected via the hinge 103.

[0153] Among them, Fig.17 As shown, the first radiation sub-branch 111 of the first radiation branch 11 is arranged at the first end 1D of the first body part 101, the second radiation branch 21 is arranged at the second end 2D of the second body part 102, the second radiation sub-branch 112 of the first radiation branch 11 is arranged at the third end 3D of the first body part 101, and the third radiation branch 22 is arranged at the fourth end 4D of the second body part 102. The first end 1D and the third end 3D are adjacent ends, the second end 2D and the fourth end 4D are adjacent ends, the first end 1D and the second end 2D are oriented in the same direction at least when the electronic device 100 is in a folded state, the third end 3D and the fourth end 4D are oriented in the same direction at least when the electronic device 100 is in a folded state, and the preset state includes a folded state.

[0154] That is, in some embodiments, the first radiation branch 11 can be disposed at two adjacent ends of the first body portion 101, and the second radiation branch 21 and the third radiation branch 22 can also be disposed at two adjacent ends of the second body portion 102. Thus, when the electronic device 100 is in a folded state, the first antenna unit 1 and the second antenna unit 2 substantially form the aforementioned Figure 9-11 The structure shown.

[0155] Among them, Fig.17 As shown, the first radiating branch 11 is bent, the second radiating branch 21 and the third radiating branch 22 are straight bars, the first radiating sub-branch 111 of the first radiating branch 11 is parallel to the first end 1D of the first main body 101, the second radiating sub-branch 112 of the first radiating branch 11 is parallel to the third end 3D of the first main body 101, the second radiating branch 21 is parallel to the second end 2D of the second main body 102, and the third radiating branch 22 is parallel to the fourth end 4D of the second main body 102.

[0156] Among them, the first end 1D and the second end 2D can both be the top end 11D or the bottom end 12D of the first body part 101 and the second body part 102, and the third end 3D and the fourth end 4D can both be the side ends 13D of the first body part 101 and the second body part 102 away from the rotating shaft 103; or, the first end 1D and the second end 2D can both be the side ends 13D of the first body part 101 and the second body part 102 away from the rotating shaft 103, and the third end 3D and the fourth end 4D can both be the top end 11D or the bottom end 12D of the first body part 101 and the second body part 102.

[0157] in, Fig.17 In the figure, the first end 1D is the top end 11D of the first main body 101, the third end 3D is the side end 13D of the first main body 101 away from the rotating shaft 103, the second end 2D is the top end 11D of the second main body 102, and the fourth end 4D is the side end 13D of the second main body 102 away from the rotating shaft 103.

[0158] Among them, when the electronic device 100 is in the preset state, that is, when the electronic device 100 is in the folded state, the projection of the first radiation sub-branch of the first radiation branch on the first end is at least partially opposite to the projection of the second radiation branch on the second end, and the projection of the second radiation sub-branch of the first radiation branch on the third end is at least partially opposite to the projection of the third radiation branch on the fourth end. Thus, it is also possible to ensure that when the electronic device 100 is in the folded state, and the first radiation branch 11 is excited by the first feed source 12, it further couples and excites the second radiation branch 21 and the third radiation branch 22 to generate corresponding currents, and ensures that when the second radiation branch 21 and the third radiation branch 22 are excited by the second feed source 23, they further couple the first radiation sub-branch 111 and the second radiation sub-branch 112 of the first radiation branch 11 to generate corresponding currents, so that the resonance in the first polarization direction and the resonance in the second polarization direction mentioned above can be better achieved.

[0159] Among them, in some embodiments, as mentioned above Figure 1 , Fig. 9 as well as Fig.12 As shown in the figures, the electronic device 100 comprises a frame B1, and the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22 can be metal segments arranged on the frame B1.

[0160] In some embodiments, the B1 may be a metal frame, and the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22 may be metal frame segments formed by opening gaps in the metal frame.

[0161] In some embodiments, B1 of the electronic device 100 may also be a non-metal frame, and the first radiation branch 11 , the second radiation branch 21 and the third radiation branch 22 may be metal segments arranged in the frame B1 of the electronic device 100 .

[0162] That is, in some embodiments, the frame B1 of the electronic device 100 may also be a non-metal frame with low conductivity such as plastic, ceramic, etc. The radiation branch 2 is a metal segment arranged in the frame B1 of the electronic device 100, for example, a metal segment attached to the inner wall of the frame B1 of the electronic device 100.

[0163] That is, in some embodiments of the present application, the radiation branches 2 may be directly formed by the frame B1 , or supported and fixed on the frame B1 .

[0164] In some embodiments, that is, in some embodiments, the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22 are fixedly arranged on the antenna bracket formed by insulating material, and then fixed in the electronic device 100 through the antenna bracket.

[0165] In some embodiments, the antenna bracket may be made of LCP (Liquid Crystal Polymer). In other embodiments, the antenna bracket may be made of other insulating materials, such as plastic, resin, rubber and the like.

[0166] In some embodiments, when the first radiation branch 11 is arranged farther away from the mainboard 4 than the second radiation branch 21 and the third radiation branch 22, the first radiation branch 11 may be arranged at the border B1 of the electronic device 100, while the second radiation branch 21 and the third radiation branch 22 are fixedly arranged on the antenna bracket formed by the insulating material, and then fixed to a position closer to the mainboard 4 in the electronic device 100 through the antenna bracket. Alternatively, when the first radiation branch 11, the second radiation branch 21 and the third radiation branch 22 are all fixedly arranged on the antenna bracket formed by the insulating material, and then fixed to the electronic device 100 through the antenna bracket, the position of the first radiation branch 11 is farther away from the mainboard 4 than the second radiation branch 21 and the third radiation branch 22, that is, closer to the border B1.

[0167] In the present application, the first feed source 12 and the second feed source 23 may be the same feed source or different feed sources. When the first feed source 12 and the second feed source 23 are the same feed source, the first signal terminal 121 of the first feed source 12 may be any one of the second signal terminal 231 and the third signal terminal 232 of the second feed source 23.

[0168] Thus, the electronic device 100 of the present application, through the first antenna unit 1 and the second antenna unit 2 of the above structure, even if at least when the electronic device 100 is in a preset state, the first radiation branch 11 of the first antenna unit 1 and the second radiation branch 21 and the third radiation branch 22 of the second antenna unit 2 are adjacent, because the direction of the current generated by the first radiation branch 11 under the excitation of the first feed source 12 is perpendicular to the direction of the current generated by the second radiation branch 21 and the third radiation branch 22 under the excitation of the second feed source 23, and the direction of the current usually affects the radiation direction of the electromagnetic wave signal, which can be the radiation direction of the electromagnetic wave signal, so that the direction of the electromagnetic wave signal radiated by the first antenna unit 1 can be perpendicular to the direction of the electromagnetic wave signal radiated by the second antenna unit 2, and the electromagnetic wave signals radiated by the two basically do not interfere with each other, thereby greatly improving the isolation between the first antenna unit 1 and the second antenna unit 2 operating in the same preset frequency band.

[0169] See also Fig.18 , is a structural block diagram of an electronic device 100 in some embodiments of the present application. The electronic device 100 includes an antenna assembly A1, wherein the antenna assembly A1 may include the first antenna unit 1 and the second antenna unit 2 mentioned above.

[0170] Specifically, as mentioned above, the first antenna unit 1 includes a first radiating branch 11 and a first feed source 12, the first radiating branch 11 includes a feed point F1 for connecting to the first feed source 12, and the first radiating branch 11 operates in a preset frequency band under the excitation of the first feed source 12, that is, supports the reception and transmission of electromagnetic wave signals in the preset frequency band. The second antenna unit 2 includes a second radiating branch 21, a third radiating branch 22 and a second feed source 23, wherein the second radiating branch 21 and the three radiating branches 22 are adjacent and spaced apart, the second feed source 23 is connected to both the second radiating branch 21 and the third radiating branch 22, and the second radiating branch 21 and the third radiating branch 22 operate in the preset frequency band under the excitation of the second feed source 23, that is, also support the reception and transmission of electromagnetic wave signals in the preset frequency band. Among them, the first radiation branch 11 is divided into a first radiation sub-branch 111 and a second radiation sub-branch 112 through the feeding point F1, the second radiation branch 21 is adjacent to and parallel to the first radiation sub-branch 111, and the third radiation branch 22 is adjacent to and parallel to the second radiation sub-branch 112; wherein, the first radiation branch 11 generates a current in a first polarization direction under the excitation of the first feed source 12, and the second radiation branch 21 and the third radiation branch 22 generate a current in a second polarization direction under the excitation of the second feed source 23, and the first polarization direction is perpendicular to the second polarization direction.

[0171] The antenna assembly A1 can be applied to at least the aforementioned Figure 1-Figure 11 The electronic device 100 is a tablet electronic device. That is, the first antenna unit 1 and the second antenna unit 2 in the antenna assembly A1 are fixedly integrated components.

[0172] Obviously, in some embodiments, the antenna assembly A1 can also be applied to the aforementioned Figure 12-Figure 17 The electronic device 100 shown is a foldable electronic device, that is, the antenna assembly A1 may include a first antenna unit 1 disposed on the first body portion 101 and a second antenna unit 2 disposed on the second body portion 102. When the electronic device 100 is in a folded state, the antenna assembly A1 includes the first antenna unit 1 and the second antenna unit 2 that are completely adjacent to each other.

[0173] Among them, the more specific structure of the antenna component A1 can be found in the aforementioned related content, which will not be repeated here.

[0174] The electronic device 100 also includes a memory, a battery, etc., which are irrelevant to the improvement of the present application and will not be described in detail.

[0175] The electronic device 100 of the present application may be any electronic device having an antenna, such as a mobile phone, a tablet computer, a laptop computer, etc.

[0176] The electronic device 100 and the antenna assembly A1 thereof of the present application, through the first antenna unit 1 and the second antenna unit 2 of the above-mentioned structure, even when at least the electronic device 100 is in a preset state, the first radiation branch 11 of the first antenna unit 1 and the second radiation branch 21 and the third radiation branch 22 of the second antenna unit 2 are adjacent, because the direction of the current generated by the first radiation branch 11 under the excitation of the first feed source 12 is perpendicular to the direction of the current generated by the second radiation branch 21 and the third radiation branch 22 under the excitation of the second feed source 23, and the direction of the current usually affects the radiation direction of the electromagnetic wave signal, which can be the radiation direction of the electromagnetic wave signal, so that the direction of the electromagnetic wave signal radiated by the first antenna unit 1 can be perpendicular to the direction of the electromagnetic wave signal radiated by the second antenna unit 2, and the electromagnetic wave signals radiated by the two basically do not interfere with each other, thereby greatly improving the isolation between the first antenna unit 1 and the second antenna unit 2 operating in the same preset frequency band.

[0177] Among them, each embodiment of the present application has its own focus. In some embodiments, there is no structure that is described in detail. If there is no conflict, reference can be made to the contents of the corresponding structure in other embodiments.

[0178] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An electronic device, characterized in that: The electronic device comprises: A first antenna unit, comprising a first radiating branch and a first feed source, wherein the first radiating branch comprises a feeding point for connecting to the first feed source, and the first radiating branch operates in a preset frequency band under the excitation of the first feed source; A second antenna unit comprises a second radiating branch, a third radiating branch and a second feed source, wherein the second radiating branch and the third radiating branch are adjacent to and spaced apart from each other, the second feed source is connected to both the second radiating branch and the third radiating branch, and the second radiating branch and the third radiating branch operate in the preset frequency band under the excitation of the second feed source; Wherein, the first radiation branch is divided into a first radiation sub-branch and a second radiation sub-branch through the feeding point, and at least when the electronic device is in a preset state, the second radiation branch is adjacent to and parallel to the first radiation sub-branch, and the third radiation branch is adjacent to and parallel to the second radiation sub-branch; wherein, the first radiation branch generates a current in a first polarization direction under the excitation of the first feed source, and the second radiation branch and the third radiation branch generate a current in a second polarization direction under the excitation of the second feed source, and the first polarization direction is perpendicular to the second polarization direction.

2. The electronic device according to claim 1, characterized in that: The first radiating branch includes a first free end and a second free end relative to each other, the feeding point is located between the first free end and the second free end, the first radiating sub-branch is the portion between the first free end of the first radiating branch and the feeding point, and the second radiating sub-branch is the portion between the second free end of the first radiating branch and the feeding point; the second radiating branch includes a first feeding end and a first grounding end relative to each other, the third radiating branch includes a second feeding end and a second grounding end relative to each other, the first grounding end and the second grounding end are used for grounding, the first feeding end and the second feeding end are adjacent to and spaced apart from each other, the second feed source includes a second signal end and a third signal end, the second signal end is connected to the first feeding end of the second radiating branch, and the third signal end is connected to the second feeding end of the second radiating branch.

3. The electronic device according to claim 2, characterized in that: The first signal end of the first feed source is used to output a first feed signal. When the first radiation branch is excited by the first feed source, a current is generated along a first polarization direction so that the resonance generated by the first radiation branch presents the first polarization direction. The second signal end and the third signal end are used to output a second feed signal and a third feed signal respectively. The second feed signal and the third feed signal differ in phase by 180°. The second radiation branch and the third radiation branch are respectively excited by the second feed signal and the third feed signal to generate a current along a second polarization direction so that the resonance generated by the second radiation branch and the third radiation branch presents the second polarization direction.

4. The electronic device according to claim 3, characterized in that: The feeding point is located in the middle position of the first radiating branch, the electrical lengths of the first radiating sub-branch and the second radiating sub-branch are equal and both equal to λ / 4, wherein λ is the wavelength corresponding to the preset frequency band, and the first radiating sub-branch and the second radiating sub-branch both resonate in the preset frequency band under the excitation of the first feeding signal, thereby realizing double resonance; the electrical lengths of the second radiating branch and the third radiating branch are both equal to λ / 4, and the second radiating branch and the third radiating branch both resonate in the preset frequency band under the excitation of the second feeding signal and the third feeding signal respectively, thereby also realizing double resonance.

5. The electronic device according to claim 4, characterized in that: At least when the electronic device is in a preset state, the first feeding end of the second radiating branch and the second feeding end of the third radiating branch are close to the feeding point, and the feeding point is located between the first feeding end and the projection of the second feeding end on the first radiating branch.

6. The electronic device according to claim 5, characterized in that: The electronic device is a tablet electronic device, the first radiation branch, the second radiation branch and the third radiation branch are arranged at the same target end of the electronic device, and the preset state includes any state.

7. The electronic device according to claim 5, characterized in that: The first radiating branch, the second radiating branch and the third radiating branch are all long straight strips, and the first radiating branch, the second radiating branch and the third radiating branch are all parallel to the end, and the second radiating branch and the third radiating branch are arranged at intervals along a preset direction, and the preset direction is the length direction of the second radiating branch and the third radiating branch.

8. The electronic device according to claim 7, characterized in that: The projections of the first radiation sub-branch of the first radiation branch and the second radiation branch on the target end at least partially overlap, and the projections of the second radiation sub-branch of the first radiation branch and the third radiation branch on the target end at least partially overlap.

9. The electronic device according to claim 6, characterized in that: The electronic device comprises a top end, a bottom end and two side ends, and the target end is any one of the top end, the bottom end and the two side ends.

10. The electronic device according to claim 5, characterized in that: The electronic device is a tablet electronic device, the first radiation sub-branch of the first radiation branch and the second radiation branch are arranged at the first target end of the electronic device, the second radiation sub-branch of the first radiation branch and the third radiation branch are arranged at the second target end of the electronic device, the first target end and the second target end are adjacent ends, and the preset state includes any state.

11. The electronic device according to claim 10, characterized in that: The first radiating branch is bent, the second radiating branch and the third radiating branch are straight, the first radiating sub-branch of the first radiating branch and the second radiating branch are parallel to the first target end, and the second radiating sub-branch of the first radiating branch and the third radiating branch are parallel to the second target end.

12. The electronic device according to claim 11, characterized in that: The projections of the first radiation sub-branch of the first radiation branch and the second radiation branch on the first target end at least partially overlap, and the projections of the second radiation sub-branch of the first radiation branch and the third radiation branch on the second target end at least partially overlap.

13. The electronic device according to claim 10, characterized in that: The electronic device includes a top end, a bottom end and two side ends; the first target end is the top end or the bottom end, and the second target end is one of the side ends; or, the first target end is one of the side ends, and the second target end is the top end or the bottom end.

14. The electronic device according to claim 6 or 10, characterized in that: The electronic device also includes a main board, the first feed source and the second feed source are arranged on the main board, the feeding point of the first radiating branch is connected to the first feed source through a first feeding connector, the first feeding end of the second radiating branch is connected to the second signal end of the second feed source through a second feeding connector, and the second feeding end of the third radiating branch is connected to the third signal end of the second feed source through a third feeding connector; wherein, the second radiating branch and the third radiating branch are closer to the main board than the first radiating branch, and the first feeding connector passes through the gap between the second radiating branch and the third radiating branch.

15. The electronic device according to claim 5, characterized in that: The electronic device is a foldable electronic device, comprising a first main body portion, a second main body portion and a rotating shaft, wherein the rotating shaft is connected between the first main body portion and the second main body portion, wherein the first main body portion and the second main body portion are rotatably connected via the rotating shaft; the first radiating branch is arranged at the first end of the first main body portion, the second radiating branch and the third radiating branch are arranged at the second end of the second main body portion, the first end and the second end are oriented in the same direction at least when the electronic device is in a folded state, and the preset state includes a folded state.

16. The electronic device according to claim 15, characterized in that: The first radiating branch, the second radiating branch and the third radiating branch are all long straight strips, and the first radiating branch is parallel to the first end, the second radiating branch and the third radiating branch are parallel to the second end and are arranged at intervals along a preset direction, and the preset direction is the length direction of the second radiating branch and the third radiating branch.

17. The electronic device according to claim 16, characterized in that: The projection of the first radiation sub-branch of the first radiation branch on the first end is at least partially opposite to the projection of the second radiation branch on the second end, and the projection of the second radiation sub-branch of the first radiation branch on the first end is at least partially opposite to the projection of the third radiation branch on the second end.

18. The electronic device according to claim 15, characterized in that: The first body portion and the second body portion both include a top end, a bottom end, and a side end away from the rotating shaft, and the first end portion and the second end portion are each one of the top end, the bottom end, and the side end.

19. The electronic device according to claim 5, characterized in that: The electronic device is a foldable electronic device, which includes a first main body, a second main body and a rotating shaft, wherein the rotating shaft is connected between the first main body and the second main body, wherein the first main body and the second main body are rotatably connected via the rotating shaft; the first radiating sub-branch of the first radiating branch is arranged at the first end of the first main body, the second radiating branch is arranged at the second end of the second main body, the second radiating sub-branch of the first radiating branch is arranged at the third end of the first main body, and the third radiating branch is arranged at the fourth end of the second main body, wherein the first end and the third end are adjacent ends, the second end and the fourth end are adjacent ends, the first end and the second end are oriented in the same direction at least when the electronic device is in a folded state, the third end and the fourth end are oriented in the same direction at least when the electronic device is in a folded state, and the preset state includes a folded state.

20. The electronic device according to claim 19, characterized in that The first radiating branch is bent, the second radiating branch and the third radiating branch are straight, the first radiating sub-branch of the first radiating branch is parallel to the first end of the first main body, the second radiating sub-branch of the first radiating branch is parallel to the third end of the first main body, the second radiating branch is parallel to the second end of the second main body, and the third radiating branch is parallel to the fourth end of the second main body.

21. The electronic device according to claim 20, characterized in that: The projection of the first radiation sub-branch of the first radiation branch on the first end is at least partially opposite to the projection of the second radiation branch on the second end, and the projection of the second radiation sub-branch of the first radiation branch on the third end is at least partially opposite to the projection of the third radiation branch on the fourth end.

22. An antenna assembly, characterized in that: include: A first antenna unit, comprising a first radiating branch and a first feed source, wherein the first radiating branch comprises a feeding point for connecting to the first feed source, and the first radiating branch operates in a preset frequency band under the excitation of the first feed source; A second antenna unit comprises a second radiating branch, a third radiating branch and a second feed source, wherein the second radiating branch and the third radiating branch are adjacent to and spaced apart from each other, the second feed source is connected to both the second radiating branch and the third radiating branch, and the second radiating branch and the third radiating branch operate in the preset frequency band under the excitation of the second feed source; Wherein, the first radiation branch is divided into a first radiation sub-branch and a second radiation sub-branch through the feeding point, the second radiation branch is adjacent to and parallel to the first radiation sub-branch, and the third radiation branch is adjacent to and parallel to the second radiation sub-branch; wherein, the first radiation branch generates a current in a first polarization direction under the excitation of the first feed source, and the second radiation branch and the third radiation branch generate a current in a second polarization direction under the excitation of the second feed source, and the first polarization direction is perpendicular to the second polarization direction.

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