Antenna assembly and electronic device

Abstract

The present application provides an antenna assembly, comprising first and second radiation stubs, and a coupling stub. The first radiation stub comprises a feed point. The second radiation stub is connected to the first radiation stub, and the direction of extension of the second radiation stub does not overlap with the direction of extension of the first radiation stub. The coupling stub is adjacent to and spaced apart from the first radiation stub, and is coupled to the first radiation stub by means of a first coupling slot. A feed source is connected to the feed point. The second radiation stub directly faces and is spaced apart from at least partial area of the coupling stub; the second radiation stub is also coupled to the coupling stub; and under excitation of the feed source, the first radiation stub, the second radiation stub, and the coupling stub resonate together in a preset frequency band to support transceiving of an electromagnetic wave signal in the preset frequency band. The present application provides an electronic device. The present application can effective reduce the size of radiation stubs and can ensure or even enhance radiation performance.

Description

Antenna assembly and electronic device

[0001] The present application claims priority to the application for an invention patent filed on September 5, 2024, with the China National Intellectual Property Bureau, application number "202411244698.1", and application name "Antenna assembly and electronic device". TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to an antenna assembly and an electronic device having the same. BACKGROUND

[0003] At present, with the popularization of 5G communication technology, people's communication experience is also getting better and better. However, with the popularization of full-screen, curved screen and the like, the net space left for the antenna is getting smaller and smaller, especially for low-frequency antennas, which often require a larger size. With the increase in various antennas, large-size low-frequency antennas often compress the space of other antennas, causing an impact on other antennas. Or the size of the low-frequency antenna needs to be reduced, which often affects the radiation performance of the low-frequency antenna to a certain extent, resulting in poor communication experience in the low-frequency band. SUMMARY

[0004] The present application provides an antenna assembly and an electronic device to solve the above problems.

[0005] In a first aspect, an antenna assembly is provided, which includes a first radiating branch, a second radiating branch, and a coupling branch. The first radiating branch includes opposite first and second ends and a feed point located between the first and second ends. The second radiating branch is connected to the first end of the first radiating branch, and the extension direction of the second radiating branch does not coincide with the extension direction of the first radiating branch. The coupling branch is adjacent to and spaced apart from the first end of the first radiating branch, and has a first coupling gap between the first end of the first radiating branch. The coupling branch and the first radiating branch are coupled through the first coupling gap. The feed source is connected to the feed point. Wherein the second radiating branch and the at least part of the area of the coupling branch are opposite and spaced apart, wherein the second radiating branch and the at least part of the area of the coupling branch have a second coupling gap, and the second radiating branch and the coupling branch are coupled through the second coupling gap, wherein under the excitation of the feed source, the first radiating branch, the second radiating branch and the coupling branch resonate in a preset frequency band, and support the transmission and reception of electromagnetic wave signals in the preset frequency band.

[0006] In a second aspect, an electronic device is provided, which includes an antenna assembly. The antenna assembly includes a first radiating branch, a second radiating branch, and a coupling branch. The first radiating branch includes opposite first and second ends and a feed point between the first and second ends. The second radiating branch is connected to the first end of the first radiating branch, and an extension direction of the second radiating branch is not coincident with an extension direction of the first radiating branch. The coupling branch is adjacent to and spaced apart from the first end of the first radiating branch, and has a first coupling gap between the first end of the first radiating branch and the coupling branch. The coupling branch is coupled to the first radiating branch through the first coupling gap. The feed source is connected to the feed point. The second radiating branch is opposite to and spaced apart from at least a portion of the coupling branch, and has a second coupling gap between the at least a portion of the coupling branch and the second radiating branch. The second radiating branch is coupled to the coupling branch through the second coupling gap. Under the excitation of the feed source, the first radiating branch, the second radiating branch, and the coupling branch cooperate to resonate in a preset frequency band, and support the transmission and reception of electromagnetic wave signals in the preset frequency band.

[0007] The antenna assembly and the electronic device of the present application can effectively utilize the space in other directions, and can meet the antenna size requirement in limited space, because the extension directions of the first radiating branch and the second radiating branch are not coincident, i.e., the first radiating branch and the second radiating branch are not arranged in a linear manner along their extension directions. The coupling between the coupling branch and the first radiating branch and the second radiating branch can be effectively strengthened, and the antenna performance can be effectively ensured and improved. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings needed to be used in the embodiments of the present application or the background art will be described below.

[0009] FIG. 1 is a structural schematic diagram of an antenna assembly in an embodiment of the present application.

[0010] FIG. 2 is another structural schematic diagram of an antenna assembly in some embodiments of the present application.

[0011] FIG. 3 is a current distribution schematic diagram of an antenna assembly in some embodiments of the present application.

[0012] FIG. 4 is still another structural schematic diagram of an antenna assembly in some embodiments of the present application.

[0013] FIG. 5 is another structural schematic diagram of an antenna assembly in some embodiments of the present application.

[0014] FIG. 6 is a further structural schematic diagram of an antenna assembly in some embodiments of the present application.

[0015] FIG. 7 is a structural schematic diagram of a matching unit in some embodiments of the present application.

[0016] FIG. 8 is a further structural schematic diagram of a matching unit in some embodiments of the present application.

[0017] FIG. 9 is a structural schematic diagram of a matching capacitance module in some embodiments of the present application.

[0018] FIG. 10 is another structural schematic diagram of a matching capacitance module in some embodiments of the present application.

[0019] FIG. 11 is a further structural schematic diagram of an antenna assembly in some embodiments of the present application.

[0020] FIG. 12 is a further structural schematic diagram of an antenna assembly in some embodiments of the present application.

[0021] FIG. 13 is a structural block diagram of an electronic device in some embodiments of the present application.

[0022] FIG. 14 is a plan schematic diagram of an electronic device in some embodiments of the present application.

[0023] FIG. 15 is a current distribution schematic diagram of an electronic device in some embodiments of the present application.

[0024] FIG. 16 is an impedance matching schematic diagram of an electronic device in some embodiments of the present application.

[0025] FIG. 17 is a comparison schematic diagram of radiation efficiency of an electronic device and a reference electronic device in some embodiments of the present application.

[0026] FIG. 18 is a radiation efficiency schematic diagram of an electronic device in different states in some embodiments of the present application.

[0027] FIG. 19 is another radiation efficiency schematic diagram of an electronic device in different states in some embodiments of the present application.

[0028] FIG. 20 is a more specific structural block diagram of an electronic device in some embodiments of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0030] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "thickness", "width" and the like indicate the positional or location relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not imply or indicate that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The term "connection" in the present application includes the meanings of physical structural connection, electrical connection, direct connection or indirect connection, and can be determined according to the required connection situation. In the description of the embodiments of the present application, the terms "first", "second" and the like are not specific, but are used to distinguish the same named objects, and the same named objects referred to by the terms "first", "second" and the like can be the same object under the description of the specification.

[0031] Please refer to FIG. 1, which is a structural schematic diagram of an antenna assembly 1 in an embodiment of the present application. As shown in FIG. 1, the antenna assembly 1 comprises a first radiating branch 11, a second radiating branch 12, a coupling branch 13 and a feed 14. The first radiating branch 11 comprises opposite first and second ends 11a and 11b and a feed point F1 between the first and second ends 11a and 11b. The second radiating branch 12 is connected to the first end 11a of the first radiating branch 11, and the extension direction of the second radiating branch 12 is not coincident with the extension direction of the first radiating branch 11. The coupling branch 13 is adjacent to the first end 11a of the first radiating branch 11 and has a first coupling gap X1 between the first end 11a of the first radiating branch 11 and the coupling branch 13, and the coupling branch 13 is coupled to the first radiating branch 11 through the first coupling gap X1. The feed 14 is connected to the feed point F1. The second radiating branch 12 and at least part of the coupling branch 13 are opposite and spaced apart, and the second radiating branch 12 and at least part of the coupling branch 13 have a second coupling gap X2 therebetween, and the second radiating branch 12 is coupled to the coupling branch 13 through the second coupling gap X2. Under the excitation of the feed 14, the first radiating branch 11, the second radiating branch 12 and the coupling branch 13 cooperate to resonate in a preset frequency band, and support the transmission and reception of electromagnetic wave signals in the preset frequency band.

[0032] Therefore, the antenna assembly 1 of the present application can effectively utilize the space in other directions compared with the prior art in which only one radiation branch extends in the same direction, and can meet the antenna size requirement in limited space, since the extension directions of the first radiation branch 11 and the second radiation branch 12 do not coincide, i.e., the first radiation branch 11 and the second radiation branch 12 are not arranged in a linear form along their extension directions. The coupling between the coupling branch 13 and the first radiation branch 11 and the second radiation branch 12 can be effectively strengthened, and the antenna performance can be effectively ensured and improved.

[0033] In some embodiments, the extension direction of the second radiation branch 12 does not coincide with the extension direction of the first radiation branch 11, which means that the second radiation branch 12 and the first radiation branch 11 are not arranged in a linear form along the same extension direction. That is, the extension direction of the second radiation branch 12 is different from the extension direction of the first radiation branch 11, i.e., there is an included angle, or the extension direction of the second radiation branch 12 is the same as the extension direction of the first radiation branch 11, but the second radiation branch 12 and the first radiation branch 11 are substantially parallel, and the like.

[0034] In some embodiments, the equivalent electrical length of the first radiation branch 11 and the second radiation branch 12 at least under the cooperation of the coupling branch 13 meets the requirement of resonating in the preset frequency band, and supports the transmission and reception of electromagnetic wave signals in the preset frequency band.

[0035] That is, in some embodiments, mainly the first radiation branch 11 and the second radiation branch 12 serve as the antenna radiation branches of the preset frequency band to support the transmission and reception of electromagnetic wave signals in the preset frequency band, and the coupling branch 13 couples the first radiation branch 11 and the second radiation branch 12 to make the equivalent electrical length of the first radiation branch 11 and the second radiation branch 12 at least under the cooperation of the coupling branch 13 meet the requirement of resonating in the preset frequency band. Generally, when the coupling branch 13 is coupled with the first radiation branch 11 and the second radiation branch 12, a certain current will also be distributed under the excitation of the feed 14, which is equivalent to a part of the electrical length, so that the required size of the first radiation branch 11 and the second radiation branch 12 is smaller than the originally required size, or in other words, the coupling branch 13 can increase the overall equivalent electrical length of the first radiation branch 11 and the second radiation branch 12, so that the required size of the first radiation branch 11 and the second radiation branch 12 is smaller than the originally required size, which is beneficial to the miniaturization of the antenna.

[0036] In some embodiments, the second radiating branch 12 comprises a third end 12a and a fourth end 12b opposite to each other, the third end 12a of the second radiating branch 12 is connected to the first end 11a of the first radiating branch 11 by a connecting member J1, and the coupling branch 13 comprises a fifth end 13a and a sixth end 13b opposite to each other, the fifth end 13a of the coupling branch 13 is adjacent to the first end 11a of the first radiating branch 11 and has the first coupling gap X1 between the fifth end 13a and the first end 11a; wherein the second radiating branch 12 is spaced apart from the coupling branch 13, and a projection of the second radiating branch 12 on the coupling branch 13 overlaps at least a part of the coupling branch 13 and is opposite to and spaced apart from the at least part of the coupling branch 13.

[0037] In some embodiments, the second radiating branch 12 comprises a third end 12a and a fourth end 12b opposite to each other, the third end 12a of the second radiating branch 12 is connected to the first end 11a of the first radiating branch 11 by a connecting member J1, and the coupling branch 13 comprises a fifth end 13a and a sixth end 13b opposite to each other, the fifth end 13a of the coupling branch 13 is adjacent to the first end 11a of the first radiating branch 11 and has the first coupling gap X1 between the fifth end 13a and the first end 11a; wherein the second radiating branch 12 is spaced apart from the coupling branch 13, and a projection of the second radiating branch 12 on the coupling branch 13 overlaps at least a part of the coupling branch 13 and is opposite to and spaced apart from the at least part of the coupling branch 13.

[0038] In some embodiments, the second radiating branch 12 comprises a third end 12a and a fourth end 12b opposite to each other, the third end 12a of the second radiating branch 12 is connected to the first end 11a of the first radiating branch 11 by a connecting member J1, and the coupling branch 13 comprises a fifth end 13a and a sixth end 13b opposite to each other, the fifth end 13a of the coupling branch 13 is adjacent to the first end 11a of the first radiating branch 11 and has the first coupling gap X1 between the fifth end 13a and the first end 11a; wherein the second radiating branch 12 is spaced apart from the coupling branch 13, and a projection of the second radiating branch 12 on the coupling branch 13 overlaps at least a part of the coupling branch 13 and is opposite to and spaced apart from the at least part of the coupling branch 13.

[0039] In some embodiments, the connection J1 is a conductive connection, and the connection J1 is also spaced from the coupling branch 13, so as to ensure the coupling relationship between the first radiating branch 11 and the second radiating branch 12 and the coupling branch 13. In which, since the second radiating branch 12 extends from a position close to the first end 11a of the first radiating branch 11 to the coupling branch 13, that is, the third end 12a of the second radiating branch 12 is close to the first end 11a of the first radiating branch 11, therefore, the length of the connection J1 can be shorter, significantly smaller than the length of the first radiating branch 11 and the second radiating branch 12, for example, less than 1 / 10, 1 / 15, etc. of the sum of the lengths of the first radiating branch 11 and the second radiating branch 12. Thus, the overall equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 can be considered as only the equivalent electrical lengths of the first radiating branch 11 and the second radiating branch 12.

[0040] In which, in the present application, the connection of the second radiating branch 12 and the first end 11a of the first radiating branch 11 includes the connection of the second radiating branch 12 and the end of the first end 11a of the first radiating branch 11, and also includes the connection of the second radiating branch 12 and the position close to the first end 11a of the first radiating branch 11. Correspondingly, the connection of the third end 12a of the second radiating branch 12 and the first end 11a of the first radiating branch 11 by the connection J1 also includes the connection of the end of the third end 12a of the second radiating branch 12 and the end of the first end 11a of the first radiating branch 11 by the connection J1, also includes the connection of the end of the third end 12a of the second radiating branch 12 and the position close to the first end 11a of the first radiating branch 11 by the connection J1, also includes the connection of the position close to the third end 12a of the second radiating branch 12 and the position close to the first end 11a of the first radiating branch 11 by the connection J1, etc.

[0041] In which, in the present application, "A" is close to or adjacent to "B", which can mean that the distance between "A" and "B" is less than a certain distance, for example, less than 1 centimeter, etc.

[0042] Please refer to FIG. 2, which is another structural schematic diagram of the antenna assembly 1 in some embodiments of the present application. In which, in FIG. 2, compared with FIG. 1, the first direction d1 and the second direction d2 are further shown.

[0043] In some embodiments, as shown in FIG. 1 and FIG. 2, the first radiating branch 11, the coupling branch 13 and the second radiating branch 12 are all straight strips, the first radiating branch 11 and the coupling branch 13 are arranged in a same direction, and the first radiating branch 11 and the coupling branch 13 are arranged in a first direction dl, wherein the first direction dl is the direction of the first radiating branch 11 and the coupling branch 13. In some embodiments, the second radiating branch 12 is parallel to the first radiating branch 11 and the coupling branch 13, and the second radiating branch 12 is arranged in a second direction d2, which is perpendicular to the first direction dl.

[0044] In some embodiments, the first radiating branch 11, the coupling branch 13 and the second radiating branch 12 are all straight strips, the first radiating branch 11 and the coupling branch 13 are arranged in a first direction dl in a linear manner, and the second radiating branch 12 is arranged in a second direction d2, which is perpendicular to the first direction dl. In this way, the second radiating branch 12 is arranged on one side of the coupling branch 13 in the second direction d2, which can effectively utilize the space in other directions, such as the second direction d2, and can effectively reduce the length of the antenna assembly 1 in the first direction, which is beneficial for miniaturization.

[0045] In some embodiments, when the first radiating branch 11 and the coupling branch 13 are arranged in a first direction dl in a linear manner, at least part of the coupling branch 13 can include a region of the coupling branch 13 close to the fifth end 13a.

[0046] In some embodiments, the second radiating branch 12 can not be parallel to the first radiating branch 11 and the coupling branch 13, as long as at least part of the second radiating branch 12 extends from the first radiating branch 11 to the side of the coupling branch 13, and is arranged opposite to at least part of the coupling branch 13 to form the second coupling slot X2. For example, at least part of the second radiating branch 12 can be arranged on one side of the coupling branch 13 in the second direction d2, and is arranged opposite to at least part of the coupling branch 13 to form the second coupling slot X2. In this case, the at least part of the coupling branch 13 can be any region of the coupling branch 13, for example, a middle region of the coupling branch 13, but not a region of the coupling branch 13 close to the fifth end 13a.

[0047] In the present application, the second radiation branch 12 being opposite to at least part of the coupling branch 13 can refer to the projection of the second radiation branch 12 on one side of the second radiation branch 12 being coincident with at least part of the coupling branch 13 along the arrangement direction of the second radiation branch 12 and the coupling branch 13, for example, along the second direction d2.

[0048] In the present application, the extension direction of the first radiation branch 11, the coupling branch 13 and the second radiation branch 12 can refer to the extension direction of the longest side of the first radiation branch 11, the coupling branch 13 and the second radiation branch 12.

[0049] In the present application, the parallel between "A" and "B" can not refer to the strict parallel, but refer to the included angle between the extension direction of "A" and "B" being less than or equal to a preset angle, for example, less than or equal to 20°, 30°, etc.

[0050] In the present application, the first radiation branch 11, the coupling branch 13 and the second radiation branch 12 shown in FIG. 1 and FIG. 2 are mainly taken as examples for illustration, in some embodiments, the first radiation branch 11 can also be in a bent shape, the first radiation branch 11 can include two sub-branches connected at an angle, and one of the sub-branches is adjacent to and spaced apart from the coupling branch 13, the end of the one of the sub-branches close to the coupling branch 13 being the first end of the first radiation branch 11, the coupling branch 13 and the second radiation branch 12 being in a straight strip shape. Alternatively, in some embodiments, the coupling branch 13 is in a bent shape, the first radiation branch 11 is in a straight strip shape, and the second radiation branch 12 can be in a straight strip shape or a bent shape and opposite to at least part of the coupling branch 13. In the present application, the first radiation branch 11, the coupling branch 13 and the second radiation branch 12 shown in FIG. 1-FIG. 2 are mainly taken as examples for illustration, in which the first radiation branch 11, the coupling branch 13 and the second radiation branch 12 are all in a straight strip shape.

[0051] In the present application, the second coupling gap X2 formed between the second radiation branch 12 and the coupling branch 13 is a long and narrow gap, as shown in FIG. 1 and FIG. 2, because the second radiation branch 12 is parallel to the first radiation branch 11 and the coupling branch 13, and the second radiation branch 12 is spaced apart from the coupling branch 13 along the second direction d2.

[0052] Please refer to FIG. 3, which is a current distribution diagram of the antenna assembly 1 in some embodiments of the present application.

[0053] Wherein, as shown in Fig. 3, the first radiating branch 11 generates a feed current il under the excitation of the feed source 14, and the feed current il is distributed on the first radiating branch 11 and the second radiating branch 12, that is, the first radiating branch 11 generates a feed current il under the excitation of the feed source 14, and the feed current il can be conducted to the second radiating branch 12 through the connecting piece J1, so that the feed current il is distributed on the first radiating branch 11 and the second radiating branch 12. In addition, the feed source 14 also excites the coupling branch 13 through the first radiating branch 11 and the second radiating branch 12 to generate a feed current i2. Wherein, the direction of the feed current i2 is the same as the direction of the feed current il.

[0054] Wherein, the first radiating branch 11 generates a feed current il from the second end lib to the first end 11a under the excitation of the feed source 14, and the feed current il is distributed on the second radiating branch 12 along the direction from the third end 12a to the fourth end 12b of the second radiating branch 12, and the feed source 14 also excites the coupling branch 13 through the first radiating branch 11 and the second radiating branch 12 to generate a feed current i2 from the fifth end 13a to the sixth end 13b of the coupling branch 13. Wherein, as shown in Fig. 3, since the first radiating branch 11 and the coupling branch 13 have the same extension direction, and the first radiating branch 11 and the coupling branch 13 are arranged along the extension direction with a spacing, and the first end 11a of the first radiating branch 11 is adjacent to the fifth end 13a of the coupling branch 13 and adjacent to the third end 12a of the second radiating branch 12, therefore, the directions of the feed current il from the second end lib to the first end 11a of the first radiating branch 11, the feed current il from the third end 12a to the fourth end 12b of the second radiating branch 12, and the feed current i2 from the fifth end 13a to the sixth end 13b of the coupling branch 13 are the same.

[0055] Therefore, due to the same direction of the feeding current i2 and the feeding current i1, the radiation performance of the preset frequency band can be effectively improved. Due to the same direction of the feeding current i2 and the feeding current i1, it is equivalent to a part of the equivalent electrical length as mentioned above, or it can be said that the total equivalent electrical length of the first radiation branch 11 and the second radiation branch 12 is increased. Therefore, in the present application, the coupling branch 13 can be equivalent to a part of the equivalent electrical length or can increase the equivalent electrical length of the first radiation branch 11 and the second radiation branch 12, so that the equivalent electrical length of the first radiation branch 11 and the second radiation branch 12 at least under the cooperation of the coupling branch 13 meets the requirement of resonance in the preset frequency band, and supports the transceiving of electromagnetic wave signals in the preset frequency band. Therefore, the required size of the first radiation branch 11 and the second radiation branch 12 can be reduced.

[0056] In some embodiments, the equivalent electrical length of the coupling branch 13 meets the resonance in a frequency band higher than the preset frequency band. When the feed source 14 couples and excites the coupling branch 13 through the first radiation branch 11 and the second radiation branch 12, the preset frequency band feeding signal generated by the feed source 14 is coupled to the coupling branch 13 through the corresponding coupling gap. Due to the first phase difference generated by the coupling gap coupling, when the equivalent electrical length of the coupling branch 13 meets the resonance in a frequency band higher than the preset frequency band, another phase difference, for example, the opposite phase difference, will be generated. After the addition of the two phase differences, the direction of the feeding current i2 on the coupling branch 13 and the phase of the feeding current i1 on the first radiation branch 11 and the second radiation branch 12 can be the same, and they are directed to the same direction.

[0057] In the present application, A frequency band higher than B frequency band can mean that the resonant frequency corresponding to A frequency band is higher than the resonant frequency corresponding to B frequency band.

[0058] In some embodiments, as shown in FIG. 1 and FIG. 2, the second radiating branch 12 has a position / region opposite to the first radiating branch 11, i.e., the projection of the second radiating branch 12 on the side of the first radiating branch 11 and the coupling branch 13 in the second direction d2 partially overlaps the first radiating branch 11. In some embodiments, the connection J1 is connected to the position / region of the second radiating branch 12 opposite to the first radiating branch 11. The connection J1 can extend along the second direction d2, i.e., the extension direction of the connection J1 can be perpendicular to the extension direction of the first radiating branch 11 and the second radiating branch 12, so that the length of the connection J1 can be substantially equal to the vertical distance between the first radiating branch 11 and the second radiating branch 12, and the length of the connection J1 can be minimized.

[0059] In some embodiments, as shown in FIG. 1 and FIG. 2, the position of the second radiating branch 12 opposite to the first radiating branch 11 is near the third end 12a of the second radiating branch 12, and the position of the second radiating branch 12 near the third end 12a corresponds to the position of the first radiating branch 11 near the first end 11a, i.e., the total length of the first radiating branch 11 and the second radiating branch 12 along the first direction d1 is substantially equal to the sum of the length of the first radiating branch 11 and the length of the second radiating branch 12, rather than less than the sum of the length of the first radiating branch 11 and the length of the second radiating branch 12. Thus, most of the first radiating branch 11 and the second radiating branch 12 can participate in radiation, the radiation performance can be improved, and the waste of space can be avoided.

[0060] FIG. 4 is another structural schematic diagram of the antenna assembly 1 in some embodiments of the present application.

[0061] In some embodiments, as shown in FIG. 4, the second radiating branch 12 is opposite to at least part of the position / region of the coupling branch 13, or further opposite to at least part of the region of the first coupling slot X1, and does not exist opposite region to the first radiating branch 11. That is, the projection of the second radiating branch 12 on the side of the first radiating branch 11 and the coupling branch 13 in the second direction d2 only overlaps at least part of the position of the coupling branch 13, or further overlaps at least part of the region of the first coupling slot X1, and does not overlap any position / region of the first radiating branch 11. As shown in FIG. 4, the connection J1 can extend obliquely between the first end 11a of the first radiating branch 11 and the third end 12a of the second radiating branch 12.

[0062] Therefore, in some embodiments, the position of the second radiating branch 12 can be more flexible, and can better adapt to the space of the electronic device to which the antenna assembly 1 is applied.

[0063] Wherein, as mentioned before, no matter whether the extension direction of the connecting member J1 is perpendicular to the extension directions of the first radiating branch 11 and the second radiating branch 12, or obliquely extends between the first end 11a of the first radiating branch 11 and the third end 12a of the second radiating branch 12, the extension direction of the connecting member J1 is different from the extension directions of the first radiating branch 11 and the second radiating branch 12. In some embodiments, the two ends of the connecting member J1 are fixedly connected with the first end 11a of the first radiating branch 11 and the third end 12a of the second radiating branch 12 respectively, or the connecting member J1 is integrally formed with the first radiating branch 11, and extends from the first end 11a of the first radiating branch 11 to the third end 12a of the second radiating branch 12, and is fixedly connected with the third end 12a of the second radiating branch 12; or the connecting member J1 is integrally formed with the second radiating branch 12, and extends from the third end 12a of the second radiating branch 12 to the first end 11a of the first radiating branch 11, and is fixedly connected with the first end 11a of the first radiating branch 11; or the connecting member J1 is integrally formed with both the first radiating branch 11 and the second radiating branch 12.

[0064] That is, in some embodiments, the connecting member J1 can be an element independent of the first radiating branch 11 and the second radiating branch 12, and the two ends of the connecting member J1 are fixedly connected with the first end 11a of the first radiating branch 11 and the third end 12a of the second radiating branch 12 respectively. In some embodiments, the connecting member J1 can also be an integral structure with at least one of the first radiating branch 11 and the second radiating branch 12.

[0065] Wherein, in the present application, the fixedly connected manner can include welding, abutting and the like.

[0066] Wherein, the shape of the connecting member J1 is not limited, as long as it can connect the first end 11a of the first radiating branch 11 with the third end 12a of the second radiating branch 12, and avoid contacting the coupling branch 13.

[0067] Wherein, the connecting member J1, the first radiating branch 11, the coupling branch 13 and the second radiating branch 12 are all made of conductive metal materials.

[0068] In some embodiments, as shown in FIGS. 1-4, the second end 11b of the first radiating branch 11 is an open end, the fourth end 12b of the second radiating branch 12 is an open end, the fifth end 13a of the coupling branch 13 is an open end, and the sixth end 13b is a ground end and is connected to the ground GND, wherein the first radiating branch 11 and the second radiating branch 12 operate in a half-wavelength dipole mode, and the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 at least under the cooperation of the coupling branch 13 is λ1 / 2, where λ1 is the wavelength corresponding to the preset frequency band.

[0069] In some embodiments, the first end 11a of the first radiating branch 11 and the third end 12a of the second radiating branch 12 are connected to form an integral radiating branch, and the second end 11b of the first radiating branch 11 and the fourth end 12b of the second radiating branch 12 are both open ends. Therefore, both ends of the radiating branch formed by the connection of the first radiating branch 11 and the second radiating branch 12 are open ends, and the entire antenna operates in a half-wavelength dipole mode. When the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 at least under the cooperation of the coupling branch 13 is λ1 / 2, the antenna can resonate in the preset frequency band and support the transmission and reception of electromagnetic wave signals in the preset frequency band.

[0070] FIG. 5 is another structural schematic diagram of the antenna assembly 1 in some embodiments of the present application.

[0071] In some embodiments, as shown in FIG. 5, the second end 11b of the first radiating branch 11 is a ground end, the fourth end 12b of the second radiating branch 12 is an open end, the fifth end 13a of the coupling branch 13 is an open end, and the sixth end 13b is a ground end. The first radiating branch 11 and the second radiating branch 12 operate in an IFA (inverted F antenna) mode, and the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 at least under the cooperation of the coupling branch 13 is λ1 / 4, where λ1 is the wavelength corresponding to the preset frequency band.

[0072] That is, in some embodiments, the difference between Figure 5 and the aforementioned Figures 1-2 and the like is that the second end 11b of the first radiating branch 11 is connected with the ground GND, thus the one end of the radiating branch formed by the first radiating branch 11 and the second radiating branch 12 is an open end and the other end is a ground end, forming an inverted F antenna, and working in an IFA mode, which is a quarter wavelength resonance mode. Thus, when the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 at least under the cooperation of the coupling branch 13 is λ1 / 4, the first radiating branch 11 and the second radiating branch 12 can resonate in the preset frequency band and support the transmission and reception of electromagnetic wave signals in the preset frequency band. Wherein, the other structures in Figure 5 can refer to the related description of Figures 1-4.

[0073] In some embodiments, as described above, the equivalent electrical length of the coupling branch 13 satisfies the resonance in a frequency band higher than the preset frequency band. Wherein, as shown in Figures 1-5, the fifth end 13a of the coupling branch 13 is an open end and the sixth end 13b is a ground end, and the coupling branch 13 forms an inverted F antenna structure and can work in an IFA mode. Thus, in some embodiments, the equivalent electrical length of the coupling branch 13 is less than λ1 / 4, where λ1 is the wavelength corresponding to the preset frequency band. Wherein, the coupling branch forms an inverted F antenna structure and resonates in a quarter wavelength mode, thus when the equivalent electrical length of the coupling branch 13 is less than λ1 / 4, the coupling branch 13 can resonate in a frequency band higher than the preset frequency band.

[0074] Thus, in some embodiments, when the equivalent electrical length of the coupling branch 13 is less than λ1 / 4, the coupling branch 13 can resonate in a frequency band higher than the preset frequency band, so that the feeding current on the coupling branch 13 and the feeding current on the first radiating branch 11 and the second radiating branch 12 are in the same direction.

[0075] Wherein, the equivalent electrical length of the coupling branch 13 can be the physical length itself, or can also be the equivalent electrical length under the cooperation of the corresponding matching unit.

[0076] In some embodiments, the total physical length of the first radiating branch 11 and the second radiating branch 12 is less than the equivalent electrical length required for resonating at the preset frequency band. For example, when the first radiating branch 11 and the second radiating branch 12 work as a whole in the half-wavelength dipole mode, the total physical length of the first radiating branch 11 and the second radiating branch 12 can be a value between λ1 / 4 and λ1 / 2, i.e., greater than λ1 / 4 and less than λ1 / 2. For another example, when the first radiating branch 11 and the second radiating branch 12 work as a whole in the IFA mode, the total physical length of the first radiating branch 11 and the second radiating branch 12 can be a value between λ1 / 8 and λ1 / 4, i.e., greater than λ1 / 8 and less than λ1 / 4.

[0077] Referring to FIG. 6, there is shown a further structural schematic diagram of the antenna assembly 1 in some embodiments of the present application. As shown in FIG. 6, the antenna assembly 1 further comprises a matching unit 15 connected between the feed source 14 and the feed point F1, and the equivalent electrical lengths of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 meet the requirement of resonating at the preset frequency band, thereby supporting the transmission and reception of electromagnetic wave signals of the preset frequency band.

[0078] That is, in some embodiments, the antenna assembly 1 further comprises a matching unit 15, and the equivalent electrical lengths of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 meet the requirement of resonating at the preset frequency band.

[0079] In FIG. 6, the matching unit 15 is added on the basis of the structure of the antenna assembly 1 shown in FIGS. 1-2, i.e., both ends of the radiating branch formed by the connection of the first radiating branch 11 and the second radiating branch 12 are open-circuit ends, and the first radiating branch 11 and the second radiating branch 12 work as a whole in the half-wavelength dipole mode. Thus, under the structure shown in FIG. 6, the equivalent electrical lengths of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 are λ1 / 2, where λ1 is the wavelength corresponding to the preset frequency band, thereby resonating at the preset frequency band and supporting the transmission and reception of electromagnetic wave signals of the preset frequency band.

[0080] Obviously, when the first radiating branch 11 and the second radiating branch 12 work as a whole in the IFA mode, the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 is λ1 / 4, where λ1 is the wavelength corresponding to the preset frequency band, so that the first radiating branch 11 and the second radiating branch 12 can also resonate in the preset frequency band and support the transmission and reception of electromagnetic wave signals in the preset frequency band.

[0081] Obviously, in some embodiments, the matching unit 15 can also be omitted, and the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 can meet the requirement of resonating in the preset frequency band and support the transmission and reception of electromagnetic wave signals in the preset frequency band.

[0082] In some embodiments, the preset frequency band is a low frequency band, the low frequency band includes a plurality of sub-frequency bands, and the matching unit 15 is an adjustable matching unit. The equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 meets the requirement of resonating in different sub-frequency bands of the low frequency band, and supports the transmission and reception of electromagnetic wave signals in different sub-frequency bands of the low frequency band.

[0083] Please refer to FIG. 7, which is a structural schematic diagram of the matching unit 15 in some embodiments of the present application. As shown in FIG. 7, the matching unit 15 includes a matching capacitor module 151 and a plurality of matching branches 152. The matching capacitor module 151 is connected between the feed source 14 and the feed point F1, and the plurality of matching branches 152 are connected in parallel between the feed point connection end 151a of the matching capacitor module 151 and the ground GND. The feed point connection end 151a of the matching capacitor module 151 is the end connected with the feed point F1. The plurality of matching branches 152 can be in an enabled state or a disabled state. According to the different matching branches 152 in the enabled state, the matching unit 15 presents different matching parameter values, so that the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 meets the requirement of resonating in different sub-frequency bands of the low frequency band.

[0084] That is, in some embodiments, the matching unit 15 can include a matching capacitor module 151 connected between the feed source 14 and the feed point F1 and a plurality of matching branches 152 connected in parallel between the feed point connection end 151a of the matching capacitor module 151 and the ground GND, so as to achieve better matching adjustment and improve the radiation performance.

[0085] In some embodiments, the low frequency band includes a plurality of sub-bands including B28 band (703-803 MHz), B20 band (792-862 MHz), B5 band (824-896 MHz) and B8 band (880-960 MHz) as shown in FIG. 7, and the plurality of matching branches 152 can include four matching branches 152. Different sub-bands in the low frequency band can be supported by switching different matching branches 152 to be in an enabled state.

[0086] Obviously, in some embodiments, the plurality of matching branches 152 can also include two or three matching branches 152, and four different matching branch 152 enabled combination states can be realized by different matching branches 152 being enabled or different numbers of matching branches 152 being enabled, so as to respectively correspond to the four sub-bands included in the low frequency band, so that the equivalent electrical lengths of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 meet the requirements of resonating in different sub-bands of the low frequency band.

[0087] Please refer to FIG. 8 for a further structural schematic diagram of the matching unit 15 in some embodiments of the present application.

[0088] As shown in FIG. 8, each matching branch 152 includes a matching element M1 and a matching switch M2 connected in series between the feed point connection end 151a of the matching capacitor module 151 and the ground GND, and the matching parameter values of the matching elements M1 in different matching branches 152 are different. When the matching switch M2 of a certain matching branch 152 is turned on, the matching branch 152 is in an enabled state, and the matching element M2 is connected between the feed point connection end 151a of the matching capacitor module 151 and the ground GND. When the matching switch M2 of the matching branch 152 is turned off, the branch in which the matching branch 152 is located is disconnected, and the matching branch 152 is in a disabled state.

[0089] The matching element M1 can include a capacitor and / or an inductor, and the matching parameter value can include a capacitance value and / or an inductance value.

[0090] The matching parameter values of the matching elements M1 in different matching branches 152 include different types and / or different parameter values of the matching elements M1 in different matching branches 152.

[0091] For example, the matching element M1 of a certain matching branch 152 includes a capacitor, the matching element M1 of another matching branch 152 includes an inductor, the matching element M1 of still another matching branch 152 also includes a capacitor, but the capacitor value of the matching element M1 is different from that of the matching element M1 included in the other matching branch, and so on. In some embodiments, the matching element M1 can include a single element or multiple elements, for example, include a single capacitor or inductor, or can include multiple capacitors and / or inductors in series or in parallel.

[0092] For example, in FIG. 8, four matching branches 152 are included, and the matching elements M1 included in the four matching branches 152 are respectively a capacitor, an inductor, a capacitor, and a capacitor.

[0093] For example, in FIG. 8, four matching branches 152 are included, and the matching elements M1 included in the four matching branches 152 are respectively a capacitor, an inductor, a capacitor, and a capacitor.

[0094] Please refer to FIG. 9, which is a structural schematic diagram of a matching capacitor module 151 in some embodiments of the present application.

[0095] In some embodiments, as shown in FIG. 9, the matching capacitor module 151 includes an adjustable matching capacitor C1, wherein the capacitor value of the adjustable matching capacitor C1 is adjustable. According to the different matching branches 152 in the enabled state and the different capacitor values of the adjustable matching capacitor C1, the matching parameter values of the matching unit 15 are different, so that the equivalent electrical lengths of the first radiating branch 11 and the second radiating branch 12 under the cooperation of the coupling branch 13 and the matching unit 15 meet the resonance in different sub-frequency bands of the low-frequency frequency band.

[0096] That is, in some embodiments, the matching unit M1 not only includes multiple matching branches 152, but also the matching capacitor module 151 includes an adjustable matching capacitor C1, the matching unit M1 can be different according to different matching branches 152 in the enabled state, and can also be different according to different capacitance values of the adjustable matching capacitor C1, so that the adjustment of the matching unit M1 can be more refined, and through this structure, the radiation performance can be better.

[0097] Please refer to FIG. 10, which is another structural schematic diagram of the matching capacitor module 151 in some embodiments of the present application.

[0098] As shown in FIG. 10, in some embodiments, the matching capacitor module 151 includes the adjustable matching capacitor C1, and also includes a fixed value capacitor C2, which is connected in parallel with the adjustable matching capacitor C1 between the feed source 14 and the feed point F1.

[0099] That is, in some embodiments, the matching capacitor module 151 includes the adjustable matching capacitor C1 and the fixed value capacitor C2 connected in parallel, so that after the capacitance value of the adjustable matching capacitor C1 changes, the change of the overall capacitance value of the matching capacitor module 151 will be reduced due to the parallel connection of the fixed value capacitor C2, which can further make the adjustment range of the adjustable matching capacitor C1 more refined.

[0100] In some embodiments, as described above, the equivalent electrical length of the coupling branch 13 is less than λ1 / 4, where λ1 is the wavelength corresponding to the preset frequency band.

[0101] When the preset frequency band is a low frequency band and includes multiple sub-frequency bands, the equivalent electrical length of the coupling branch 13 being less than λ1 / 4 can specifically mean that the equivalent electrical length of the coupling branch 13 is less than the wavelength corresponding to the highest sub-frequency band of the low frequency band, so that no matter which sub-frequency band of the low frequency band is currently supported, the equivalent electrical length of the coupling branch 13 can be less than 1 / 4 of the wavelength corresponding to the low frequency sub-frequency band currently working in, which can ensure that the directions of the feed currents on the first and second radiation branches 11 and 12 are the same, and can improve the radiation performance and the overall electrical length of the first and second radiation branches 11 and 12, which is beneficial to miniaturization.

[0102] Please refer to FIG. 11, which is a further structural schematic diagram of the antenna assembly 1 in some embodiments of the present application.

[0103] In some embodiments, as shown in FIG. 11, the antenna assembly 1 further comprises another feed source 16, and the coupling branch 13 further comprises a feeding point F2, and the feed source 16 is connected to the feeding point F2, and the coupling branch 13 is further capable of operating at another frequency band under the excitation of the feed source 16, and supporting the transmission and reception of electromagnetic wave signals of the other frequency band. Thus, the frequency band supported by the antenna assembly 1 can be effectively improved to meet the requirements of multiple frequency bands.

[0104] In some embodiments, the other frequency band supported by the coupling branch 13 is higher than the preset frequency band mentioned above. For example, when the preset frequency band is a low frequency band, the other frequency band can be a medium-high frequency band, a high frequency band, a Wifi frequency band, or other frequency bands.

[0105] Thus, in the present application, since the coupling branch 13 itself can support another frequency band, and the coupling branch 13 can improve the equivalent electrical length of the first radiating branch 11 and the second radiating branch 12, the size of the radiating branch operating at the preset frequency band can be effectively reduced.

[0106] In FIG. 11, the difference from the foregoing embodiments is that the antenna assembly further comprises another feed source 16, and the coupling branch 13 is further capable of supporting the transmission and reception of electromagnetic wave signals of other frequency bands under the excitation of the feed source 16, and other structures can refer to the structure of the antenna assembly 1 in any of the foregoing embodiments. In FIG. 11, the structure shown in FIG. 6 is taken as an example to further increase the feed source 16 and other structures.

[0107] As mentioned above, the fifth end 13a of the coupling branch 13 is an open circuit end, and the sixth end 13b is a ground end, and the coupling branch 13 forms a structure similar to a inverted F antenna, and can operate in IFA mode.

[0108] Therefore, the equivalent electrical length of the coupling branch 13 can be λ2 / 4, where λ2 is the wavelength corresponding to the other frequency band. The other frequency band is higher than the preset frequency band at which the first radiating branch 11 and the second radiating branch 12 operate. That is, the resonant frequency of the other frequency band is higher than the resonant frequency of the preset frequency band. Thus, the coupling branch 13 can operate at other frequency bands, and can ensure that the preset frequency band feeding current with the same direction as the feeding current generated by the first radiating branch 11 and the second radiating branch 12 is also generated.

[0109] In some embodiments, the equivalent electrical length of the coupling branch 13 can be the equivalent electrical length of itself, that is, the same as the physical length of the coupling branch 13. In some embodiments, a matching unit can also be included between the feed source 16 and the feeding point F2, and the equivalent electrical length of the coupling branch 13 can also be the equivalent electrical length under the cooperation of the matching unit.

[0110] The matching unit between the feed source 16 and the feed point F2 can include a capacitor and / or an inductor, or can also include the structure of the matching unit 15 shown in FIG. 7.

[0111] Referring to FIG. 12, another structure of the antenna assembly 1 in some embodiments of the present application is shown. In some embodiments, the antenna assembly further includes a matching unit 17 connected between the feed source 16 and the feed point F2 of the coupling branch 13.

[0112] That is, in some embodiments, the antenna assembly 1 can further include a matching unit 17, and the equivalent electrical length of the coupling branch 13 can also be the equivalent electrical length under the matching of the matching unit 17.

[0113] The matching unit 17 can include a capacitor and / or an inductor, for example, can include a parallel inductor and capacitor, or a series inductor and capacitor, or a structure of a parallel inductor and capacitor in series with an inductor or a capacitor, or can also be a structure of a series inductor and capacitor in parallel with a capacitor or an inductor, etc. Thus, the equivalent electrical length of the coupling branch 13 under the matching of the matching unit 17 can meet the resonance requirement of the another frequency band.

[0114] In some embodiments, the matching unit 17 also has a band-pass filtering function, that is, the matching unit 17 can only allow the feed current of the another frequency band to pass through, and prevent the feed current of the preset frequency band from passing through, that is, prevent the feed current generated by the coupling branch 13 under the coupling excitation of the feed source 14 through the first radiation branch 11 and the second radiation branch 12 from passing through, thereby avoiding the interference between the electromagnetic wave signals of the preset frequency band and the another frequency band.

[0115] Referring to FIG. 13, a structure block diagram of an electronic device 100 in some embodiments of the present application is shown. As shown in FIG. 13, the electronic device 100 can include the antenna assembly 1 of any of the foregoing embodiments. Thus, the electronic device 100 equipped with the antenna assembly 1 in any of the foregoing embodiments can more effectively utilize the space in other directions, and can meet the antenna size requirement in a limited space. By coupling the coupling branch 13 with the first radiation branch 11 and the second radiation branch 12, the coupling between the coupling branch and the first radiation branch 11 and the second radiation branch 12 can be effectively strengthened, and the antenna performance can be effectively ensured and improved.

[0116] Please refer to FIG. 14, which is a plan view of the electronic device 100 in some embodiments of the present application. In FIG. 14, the view is from the back side of the electronic device 100, i.e., from the side facing away from the display screen. The structure of the antenna assembly 1 is shown in the view from the back side of the electronic device 100. The antenna assembly 1 shown in FIGS. 1-11, etc., can also be the antenna assembly 1 viewed from the back side of the electronic device 100.

[0117] As shown in FIG. 14, the electronic device 100 also includes a bezel B1. The first radiating branch 11 and the coupling branch 13 are disposed in the bezel B1 of the electronic device 100. The second radiating branch 12 is disposed on the side facing the inner surface of the first radiating branch 11 and the coupling branch 13.

[0118] That is, in some embodiments, the first radiating branch 11 and the coupling branch 13 are disposed in the bezel B1 of the electronic device 100, and the second radiating branch 12 is disposed inside the inner surface of the bezel B1. Because the size of the first radiating branch 11 can be small, space can be left for other frequency band antennas in the bezel B1, which greatly satisfies the current multi-frequency band antenna arrangement requirements. The bezel B1 usually forms part of the appearance surface of the electronic device 100. The above design is also conducive to meeting the appearance and stacking requirements of the electronic device.

[0119] As shown in FIG. 14, the first radiating branch 11 and the coupling branch 13 are separated by a gap X0. The gap X0 can be the first coupling gap X1 described above.

[0120] In some embodiments, the bezel B1 of the electronic device 100 is a metal bezel. The first radiating branch 11 and the coupling branch 13 are metal bezel segments formed by the gap X0 in the metal bezel of the electronic device 100.

[0121] In other embodiments, the bezel B1 of the electronic device 100 is a non-metal bezel. The first radiating branch 11 and the coupling branch 13 are metal segments disposed in the bezel of the electronic device 100.

[0122] That is, in other embodiments, the bezel B1 of the electronic device 100 can also be a non-metal bezel such as a plastic, plastic, ceramic, etc. The first radiating branch 11 and the coupling branch 13 are metal segments disposed in the bezel B1 of the electronic device 100. The first radiating branch 11 and the coupling branch 13 can be embedded in the bezel of the electronic device 100 or disposed on the inner side surface of the bezel of the electronic device 100.

[0123] As shown in FIG. 14, the bezel B1 includes two opposite long bezels B11 and two opposite short bezels B12, wherein the first radiating branch 11 and the coupling branch 13 can be disposed in one of the long bezels B11. It is obvious that the electronic device 100 can include the antenna assembly 1 in any of the foregoing embodiments.

[0124] In some embodiments, the largest area of the first radiating branch 11 and the coupling branch 13 is the surface parallel to the surface of the bezel B1, wherein the surface of the bezel B1 is substantially perpendicular to the surface of the display screen of the electronic device 100.

[0125] As shown in FIG. 14, the electronic device 100 includes a top end D11, a bottom end D12 and two side ends D13 and D14. The two long bezels B11 are the bezels located at the two side ends D13 and D14 of the electronic device 100, and the two short bezels B12 are the bezels located at the top end D11 and the bottom end D12 of the electronic device 100.

[0126] In some embodiments, as described above, the first radiating branch 11, the coupling branch 13 and the second radiating branch 12 are all straight strips. The first radiating branch 11 and the coupling branch 13 are disposed at one of the side ends of the electronic device 100, for example, as shown in FIG. 14, the first radiating branch 11 and the coupling branch 13 are disposed at the side end D13 of the electronic device 100. The second radiating branch 12 is substantially parallel to the first radiating branch 11 and the coupling branch 13, and faces at least part of the second radiating branch 12.

[0127] Therefore, by this structure, as described above, the space of the electronic device 100 can be fully utilized, the size of the antenna branches on the bezel B1 can be reduced, and other frequency band antenna branches can be better disposed on the bezel B1.

[0128] Wherein, as shown in FIG. 14, the first radiating branch 11 is closer to the top end of the electronic device 100 relative to the coupling branch 13. Thus, due to the increase in electrical length caused by the connection of the first radiating branch 11 to the second radiating branch 12 located inside the frame B1, the physical size, i.e. the physical length, of the first radiating branch 11 can be smaller, and the first radiating branch 11 being closer to the top end of the electronic device 100 relative to the coupling branch 13 can cause the gap X0 between the first radiating branch 11 and the coupling branch 13, i.e. the first coupling gap X1, to be closer to the top end D11 of the electronic device 100. Thus, when the electronic device 100 is held by a user, since the first coupling gap X1 is closer to the top end D11 of the electronic device 100, and when the user holds the electronic device 100, the hand is generally closer to the bottom end D12 of the electronic device 100, it can be ensured that the first coupling gap X1 is not held by the user as much as possible, and the radiation performance is improved.

[0129] In some embodiments, the distance between the first coupling gap X1 between the coupling branch 13 and the first end 11a of the first radiating branch 11 and the bottom end D12 is greater than or equal to a preset distance. That is, in some embodiments, the distance between the first coupling gap X1 between the coupling branch and the first radiating branch 11 and the bottom end D12 is greater than or equal to a preset distance. Wherein, the preset distance can be a distance corresponding to a holding range of the user holding the electronic device 100. That is, the holding range of the user is generally a certain distance from the bottom end D12 upwards, and the preset distance is approximately equal to the distance corresponding to the holding range.

[0130] In some embodiments, the preset distance can be 88mm, 90mm, etc. Thus, it can be ensured that the hand will not block the first coupling gap X1 when the user holds it.

[0131] Wherein, FIG. 14 is only an example. In some embodiments, the first radiating branch 11 can also be in a bent shape, the first radiating branch 11 includes two sub-branches connected at an angle, one sub-branch of the first radiating branch 11 is arranged at the top end D11 of the electronic device 100, the other sub-branch of the first radiating branch 11 is arranged at one side end of the electronic device 100, for example, the side end D13, and the coupling branch 13 is arranged at the side end D13 and close to the top end D11. That is, in some embodiments, by arranging the first radiating branch 11 as two sub-branches connected at an angle, the first coupling gap X1 can be made closer to the top end D11 of the electronic device 100, and it can be ensured that it will not be held by the user.

[0132] Wherein, the "top" and "bottom" and other orientation words used in the description of the electronic device 100 are mainly based on the orientation of the user holding the electronic device 100, and the position facing the top side of the electronic device 100 is "top", and the position facing the bottom side of the electronic device 100 is "bottom", which does not indicate or imply that the device or element must have a specific orientation, structure and operation, so it cannot be understood as a limitation on the orientation of the electronic device 100 in the actual application scenario. In some embodiments, the bottom end D12 of the electronic device 100 is the end provided with the earphone hole and the USB hole, and the top end D11 of the electronic device 100 is the other end opposite to the end provided with the earphone hole and the USB hole, which can also refer to the end provided with the camera, the microphone, etc.

[0133] As shown in FIG. 14, in some embodiments, the electronic device further includes a ground plate 101, and the aforementioned ground GND can be the ground plate 101, wherein the projection of the first radiating branch 11 and the coupling branch 13 on the ground plate 101 is located in the ground plate 101.

[0134] That is, in some embodiments, the ground of each element can be connected to the ground plate 101 to achieve grounding, and each area through which the first radiating branch 11 and the coupling branch 13 extend is opposite to the ground plate 101, so that at least the projection of the radiating branch 11 on the ground plate 101 is located in the ground plate 101. Therefore, the radiating branch 11 can also effectively excite the ground plate current of the ground plate 101 under the excitation of the feed 14, and the antenna radiation performance can be effectively improved.

[0135] As shown in FIG. 14, the electronic device 100 further includes a main board 102, wherein the aforementioned feed 14, matching unit 15, etc. can be provided on the main board 102. In some embodiments, the ground plate 101 can be at least part of the ground layer on the main board 102.

[0136] Wherein, as shown in FIG. 14, the electronic device 100 further includes a middle frame 103, which is used to support the display screen and other structures, and the middle frame 103 serves as the whole machine ground, and the ground layer on the main board 102 is connected with the middle frame 103 to provide a ground potential. Wherein, in some embodiments, the ground plate 101 can be at least part of the middle frame 103, and the aforementioned ground GND can also be the at least part of the middle frame 103. In FIG. 14, the ground plate 101 and the middle frame 103 are taken as an example for illustration.

[0137] The frame B1 of the electronic device 100 can further be provided with other antenna radiation branches, which are spaced apart by a gap X0. Since the other antenna radiation branches are irrelevant to the improvement of the present application, they are not shown.

[0138] Referring to FIG. 15, there is shown a current distribution diagram of the electronic device 100 in some embodiments of the present application. In particular, FIG. 15 is a current distribution diagram obtained from simulation test of the electronic device 100 shown in FIG. 14 operating in the preset frequency band.

[0139] As shown in FIG. 15 and as previously described, when the first radiation branch 11 generates a feed current i1 under the excitation of the feed source 14, the feed source 14 also excites the coupling branch 13 to generate a feed current i2, so that the region of the frame B1 with the same direction current distribution is at least located in the first radiation branch 11 and the coupling branch 13. Meanwhile, the first radiation branch 11 and the coupling branch 13 also excite the ground plate 101 to generate a ground plate current i3 opposite to the direction of the feed current. Since the feed current i1 on the first radiation branch 11 and the feed current i2 on the coupling branch 13 are in the same direction, the ground plate current i3 excited by the first radiation branch 11 and the coupling branch 13 on the ground plate 101 is also in the same direction, so that a ground plate current i3 with a larger length is excited on the ground plate 101, thereby effectively improving the radiation performance of the preset frequency band.

[0140] As previously described, the second radiation branch 12 also has a feed current i1 distributed thereon. In FIG. 15, the feed current on the second radiation branch 12 is omitted mainly for showing the current distribution on the first radiation branch 11 and the coupling branch 13 located on the frame B1.

[0141] Referring to FIG. 16, there is shown an impedance matching diagram of the electronic device 100 in some embodiments of the present application.

[0142] In FIG. 16, there are shown the impedance values Z11 of the antenna assembly 1 of the electronic device 100 corresponding to the B28 frequency band, the impedance values Z12 corresponding to the B20 frequency band, the impedance values Z13 corresponding to the B5 frequency band, and the impedance values Z14 corresponding to the B8 frequency band.

[0143] In FIG. 16, the circle Y1 represents the real part of the impedance, i.e. the resistance part, and the radial line Y2 extending from the edge to the center represents the imaginary part of the impedance, i.e. the reactance part. The intersection of each circle Y1 and the radial line Y2 corresponds to an impedance value.

[0144] Wherein, generally speaking, the center point O1 in Figure 16, that is, the point corresponding to the circle Y1 is 1, the corresponding radial line Y2 is 0, corresponds to the impedance value of the radio frequency circuit, and generally the impedance value of the antenna structure should be adjusted to be as close as possible to the impedance value of the radio frequency circuit. Generally speaking, the closer the impedance value of the antenna structure to the impedance value of the radio frequency circuit, the lower the return loss, and the better the antenna radiation performance.

[0145] Wherein, after increasing the second radiation branch 12, as shown by the circles where the impedance values Z11, Z12, Z13, Z14, etc. in Figure 16 are located, the impedance value Z11 of the antenna assembly 1 corresponding to the B28 frequency band of the low frequency band, the impedance value Z12 corresponding to the B20 frequency band, the impedance value Z13 corresponding to the B5 frequency band, and the impedance value Z14 corresponding to the B8 frequency band will be pushed to a position closer to the center point O1.

[0146] For example, the impedance value corresponding to the B28 frequency band of the low frequency band is the impedance value corresponding to the Z10 position in Figure 16, which is farther away from the center point O1, and after increasing the second radiation branch 12, the impedance value of the antenna assembly 1 corresponding to the B28 frequency band of the low frequency band becomes the impedance value Z11 shown in Figure 16, which is closer to the center point O1.

[0147] As can be seen, in the present application, by the structure of the above-mentioned antenna assembly 1, that is, by increasing the second radiation branch 12 on the inside of the frame B1 of the electronic device 100, the overall electrical length of the radiation branch working in the preset frequency band can be extended, the radiation performance of the preset frequency band can be improved, and the frame B1 will not be occupied too much, which can give space to the antenna design of other frequency bands, meeting the current demand for multi-frequency antenna design.

[0148] Please refer to Figure 17, which is a comparison diagram of the radiation efficiency of the electronic device and the reference electronic device in some embodiments of the present application.

[0149] Wherein, the comparison diagram of the radiation efficiency in Figure 17 is obtained by simulation test with the electronic device 100 and a reference electronic device shown in Figure 14 as examples working in the preset frequency band. Wherein, the matching unit 15 included in the electronic device 100 can be the structure shown in Figure 7. Wherein, the reference electronic device is an electronic device that does not include the matching unit 15 shown in Figure 14, for example, it can be an electronic device obtained by removing the matching unit 15 from the electronic device 100 shown in Figure 14. Wherein, the reference electronic device working in the preset frequency band can be that the equivalent electrical length of the first radiation branch 11 and the second radiation branch 12 only under the cooperation of the coupling branch 13 meets the resonance in the preset frequency band. That is, the reference electronic device working in the preset frequency band can be realized only by the antenna branch.

[0150] The solid line curve in FIG. 17 is a radiation efficiency curve of the electronic device 100 including the matching unit 15 operating in the preset frequency band, and the dotted line curve in FIG. 17 is a radiation efficiency curve of the reference electronic device operating in the preset frequency band.

[0151] In FIG. 17, the preset frequency band is taken as an example of the B8 frequency band. As shown in FIG. 17, the radiation efficiency of the electronic device 100 including the matching unit 15 is only reduced by about 0.6 dB compared with the reference electronic device.

[0152] Generally, the use of the matching unit will result in a greater reduction in radiation efficiency than the use of the antenna support alone. However, the use of the matching unit 15 shown in FIG. 7 in the present application can achieve switching between multiple frequency bands, for example, switching between multiple sub-frequency bands in the low-frequency band, and the radiation efficiency is reduced very little compared with the use of the matching unit, thereby maintaining good radiation performance.

[0153] FIG. 18 is a radiation efficiency diagram of the electronic device 100 in different states according to some embodiments of the present application.

[0154] In FIG. 18, the radiation efficiency comparison diagram is obtained by simulating and testing the electronic device 100 shown in FIG. 14 operating in multiple sub-frequency bands in the low-frequency band in free space, a right-hand holding state, and a left-hand holding state, respectively.

[0155] In FIG. 18, the multiple sub-frequency bands in the low-frequency band are taken as examples of the B28, B5, and B8 frequency bands. As shown in FIG. 18, when the electronic device 100 is in free space, that is, not held, the radiation efficiency of the electronic device 100 operating in the B28, B5, and B8 frequency bands is -4.5 dB, -4 dB, and -4.5 dB, respectively. When the electronic device 100 is in a right-hand holding state, the radiation efficiency of the electronic device 100 operating in the B28, B5, and B8 frequency bands is -8.3 dB, -6.3 dB, and -5.8 dB, respectively. When the electronic device 100 is in a left-hand holding state, the radiation efficiency of the electronic device 100 operating in the B28, B5, and B8 frequency bands is -7 dB, -5.3 dB, and -5.8 dB, respectively.

[0156] As shown in FIG. 18, the electronic device 100 according to the present application has a higher radiation efficiency when operating in the preset frequency band in the right-hand holding state and the left-hand holding state compared with the radiation efficiency in free space, but the radiation efficiency itself is still high, and the radiation performance is still excellent.

[0157] Please refer to FIG. 19, which is another radiation efficiency diagram of the electronic device 100 in different states in some embodiments of the present application.

[0158] In FIG. 19, the radiation efficiency comparison diagram is also simulated and tested when the electronic device 100 shown in FIG. 14 is respectively in free space, right-hand holding state and left-hand holding state and works in multiple sub-frequency bands of the low-frequency frequency band.

[0159] In FIG. 19, the difference between FIG. 19 and FIG. 18 is that the right-hand holding state and the left-hand holding state in FIG. 19 are specifically the holding state of contacting the first coupling gap X1.

[0160] In FIG. 19, the multiple sub-frequency bands of the low-frequency frequency band are also taken as B28, B5 and B8 frequency bands for example. As shown in FIG. 19, when the electronic device 100 is in free space, i.e. not held, the radiation efficiency of the electronic device 100 is respectively -4.5 dB, -4 dB and -4.5 dB when working in B28, B5 and B8 frequency bands. When the electronic device 100 is in the right-hand holding state (the "right hand (contact)" shown in FIG. 19), the radiation efficiency of the electronic device 100 is respectively -9.5 dB, -7.3 dB and -7.2 dB when working in B28, B5 and B8 frequency bands. When the electronic device 100 is in the left-hand holding state (the "left hand (contact)" shown in FIG. 19), the radiation efficiency of the electronic device 100 is respectively -8.6 dB, -7.6 dB and -8.5 dB when working in B28, B5 and B8 frequency bands.

[0161] It can be seen that when the electronic device 100 of the present application is in the right-hand holding state and the left-hand holding state and contacts the first coupling gap X1, the radiation efficiency of the electronic device 100 working in the preset frequency band is further decreased compared with the radiation efficiency in free space, but the radiation efficiency itself is still high and the radiation performance is still very good.

[0162] Therefore, through the above structure of the electronic device 100, the distance between the first coupling gap X1 between the coupling branch 13 and the first end 11a of the first radiating branch 11 and the bottom end D12 is greater than or equal to the preset distance, as described above. In some embodiments, the preset distance can be 88 mm, 90 mm, etc. Thus, the first coupling gap X1 between the coupling branch 13 and the first end 11a of the first radiating branch 11 is higher than the hand position when the user holds it, and even if part of it is touched by the human hand, it will not be touched too much, and since the human hand can be equivalent to a high dielectric constant object, the vertical electric field generated by the coupling branch 13 can effectively excite the user's fingers and other hands to radiate, thereby effectively ensuring the radiation performance in the left and right hand holding state.

[0163] Wherein, other structures of the antenna assembly 1 included in the electronic device 100 can refer to the foregoing description of FIG. 11 and other related drawings, which will not be repeated here.

[0164] Wherein, as described above, the electronic device 100 can also include the antenna assembly 1 in any of the foregoing embodiments, which will not be described one by one through the accompanying drawings.

[0165] Wherein, in some embodiments, when the antenna assembly 1 further includes a matching unit 15, and the preset frequency band is a low frequency band including a plurality of sub-frequency bands, the enabling state of the matching branch 152 included in the matching unit 15 can be switched according to the low frequency sub-band in which the electronic device 100 currently needs to work. Wherein, when the matching capacitor module 151 of the matching unit 15 further includes an adjustable matching capacitor C1, the value of the adjustable matching capacitor C1 can also be according to the low frequency sub-band in which the electronic device 100 currently needs to work. That is, the matching switch M2 of the matching branch 152 of the matching unit 15 can be in a corresponding on or off state according to the low frequency sub-band in which the electronic device 100 currently needs to work, and the value of the adjustable matching capacitor C1 can also be adjusted to a corresponding capacitance value according to the low frequency sub-band in which the electronic device 100 currently needs to work.

[0166] Please refer to FIG. 20, a more specific structure block diagram of the electronic device 100 in some embodiments of the present application. As shown in FIG. 20, the electronic device 100 further includes a controller 2.

[0167] Wherein, the controller 2 is at least used to control the corresponding matching branch 152 to be in an enabled state according to the frequency band in which the electronic device 100 currently needs to work, for example, according to the sub-band of the low frequency band in which the electronic device 100 currently needs to work, or further control the value of the adjustable matching capacitor C1 to be adjusted to a corresponding capacitance value.

[0168] In some embodiments, a correspondence between the frequency bands in which the electronic device 100 needs to operate and the matching branches 152 can be established in advance, or a correspondence between the frequency bands in which the electronic device 100 needs to operate and the matching branches 152 and the adjustable matching capacitor C1 can be established in advance. Thus, when the controller 2 determines that the current frequency band in which operation is needed is a certain sub-frequency band of the low-frequency frequency band, the controller 2 can control the corresponding matching branch 152 to be enabled according to the correspondence, or further adjust the capacitance value of the adjustable matching capacitor C1 to the corresponding capacitance value.

[0169] The current frequency band in which operation is needed can be a frequency band in which operation is currently performed, or a frequency band to which switching is needed. The controller 2 can determine the current frequency band in which operation is needed according to a service currently being communicated, a communication quality of the current frequency band, and the like.

[0170] The matching switch M2 and the like can be digital controlled switches, for example, transistors such as MOS tubes, and can be turned on or off under the control of the controller 2 to achieve the corresponding connection state. The adjustable matching capacitor C1 can be a digitally adjustable matching capacitor, or can change the capacitance value under the control of the controller 2.

[0171] The controller 2 can be a processing unit such as a central processing unit, a digital signal processor, a single-chip microcomputer, or the like.

[0172] The electronic device 100 further includes a memory, a battery, and the like, which are not described in detail because they are not related to the improvement of the present application.

[0173] The electronic device 100 of the present application can be a mobile phone, a tablet computer, a notebook computer, or the like.

[0174] The antenna assembly 1 and the electronic device 100 of the present application can more effectively utilize space in other directions, can meet the antenna size requirement in limited space, and can effectively strengthen the coupling between the coupling branch 13 and the first and second radiation branches 11 and 12 by coupling the coupling branch 13 with the first and second radiation branches 11 and 12, thereby effectively ensuring and improving the antenna performance.

[0175] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0176] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application; in the case of no 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 should be subject to the protection scope of the claims.

Claims

1. An antenna assembly, characterized by The antenna comprises: a first radiating branch comprising opposite first and second ends and a feed point between the first and second ends; a second radiating branch connected to the first end of the first radiating branch, and the extension direction of the second radiating branch is not coincident with the extension direction of the first radiating branch; a coupling branch adjacent to and spaced from the first end of the first radiating branch, and having a first coupling gap between the first end of the first radiating branch and the coupling branch, and the first radiating branch and the coupling branch are coupled through the first coupling gap; a feed connected to the feed point; wherein the second radiating branch is opposite and spaced from at least part of the area of the coupling branch, wherein the second radiating branch and the coupling branch have a second coupling gap between the at least part of the area of the coupling branch and the second radiating branch, and the second radiating branch and the coupling branch are coupled through the second coupling gap, and under the excitation of the feed, the first radiating branch, the second radiating branch and the coupling branch are resonant in a preset frequency band to support the transmission and reception of electromagnetic wave signals in the preset frequency band.

2. The antenna assembly of claim 1, wherein, The equivalent electrical lengths of the first radiating branch and the second radiating branch at least under the cooperation of the coupling branch meet the requirement of resonating in the preset frequency band to support the transmission and reception of electromagnetic wave signals in the preset frequency band.

3. The antenna assembly of claim 1, wherein, The second radiating branch comprises opposite third and fourth ends, the third end of the second radiating branch is connected to the first end of the first radiating branch through a connecting piece, and the coupling branch comprises opposite fifth and sixth ends, the fifth end of the coupling branch is adjacent to the first end of the first radiating branch and has the first coupling gap between the first end of the first radiating branch and the fifth end of the coupling branch; wherein the second radiating branch is spaced from the coupling branch, and the projection of the second radiating branch on the coupling branch coincides with at least part of the area of the coupling branch, and is opposite and spaced from at least part of the area of the coupling branch.

4. The antenna assembly of claim 3, wherein, The first radiating branch, the coupling branch and the second radiating branch are all straight strips, the extension directions of the first radiating branch and the coupling branch are the same, and the first radiating branch and the coupling branch are arranged in a first direction, wherein the first direction is the extension direction of the first radiating branch and the coupling branch; the second radiating branch is parallel to the first radiating branch and the coupling branch, and the second radiating branch is arranged in a second direction at least with the coupling branch, and the second direction is perpendicular to the first direction.

5. The antenna assembly of claim 3, wherein, The extension direction of the connecting piece is different from the extension directions of the first and second radiation branches, two ends of the connecting piece are fixedly connected with the first end of the first radiation branch and the third end of the second radiation branch respectively, or the connecting piece is integrally formed with the first radiation branch and extends from the first end of the first radiation branch to the third end of the second radiation branch and is fixedly connected with the third end of the second radiation branch, or the connecting piece is integrally formed with the second radiation branch and extends from the third end of the second radiation branch to the first end of the first radiation branch and is fixedly connected with the first end of the first radiation branch, or the connecting piece is integrally formed with the first and second radiation branches.

6. The antenna assembly of claim 3, wherein, The second end of the first radiation branch is an open end, the fourth end of the second radiation branch is an open end, the fifth end of the coupling branch is an open end, and the sixth end is a ground end, wherein the first and second radiation branches work in a half-wavelength dipole mode, and the equivalent electrical length of the first and second radiation branches at least under cooperation of the coupling branch is λ1 / 2, wherein λ1 is a wavelength corresponding to the preset frequency band.

7. The antenna assembly of claim 3, wherein, The second end of the first radiation branch is a ground end, the fourth end of the second radiation branch is an open end, the fifth end of the coupling branch is an open end, and the sixth end is a ground end, wherein the first and second radiation branches work in an IFA mode, and the equivalent electrical length of the first and second radiation branches at least under cooperation of the coupling branch is λ1 / 4, wherein λ1 is a wavelength corresponding to the preset frequency band.

8. The antenna assembly of claim 3, wherein, The antenna assembly further comprises a matching unit connected between the feed source and the feed point, and the equivalent electrical length of the first and second radiation branches under cooperation of the coupling branch and the matching unit satisfies the requirement of resonating in the preset frequency band, thereby supporting the transmission and reception of electromagnetic wave signals in the preset frequency band.

9. The antenna assembly of claim 8, wherein, The preset frequency band is a low frequency band, the low frequency band comprises a plurality of sub-frequency bands, the matching unit is an adjustable matching unit, and the equivalent electrical length of the first and second radiation branches under cooperation of the coupling branch and the matching unit satisfies the requirement of resonating in different sub-frequency bands of the low frequency band, thereby supporting the transmission and reception of electromagnetic wave signals in different sub-frequency bands of the low frequency band.

10. The antenna assembly of claim 9, wherein, The matching unit comprises a matching capacitor module and a plurality of matching branches, the matching capacitor module is connected between the feed source and the feed point, the plurality of matching branches are connected in parallel between the feed point connection end of the matching capacitor module and the ground, the feed point connection end of the matching capacitor module is connected with the feed point, wherein the plurality of matching branches can be in an enabled state or a disabled state, and different matching parameter values of the matching unit are presented according to different matching branches in the enabled state, so that the equivalent electrical lengths of the first radiation branch and the second radiation branch under the cooperation of the coupling branch and the matching unit meet the resonance in different sub-frequency bands of the low-frequency frequency band.

11. The antenna assembly of claim 10, wherein, Each matching branch comprises a matching element and a matching switch connected in series between the feed point connection end of the matching capacitor module and the ground, and the parameter values of the matching elements in different matching branches are different, when the matching switch of a certain matching branch is turned on, the matching branch is in the enabled state, and the matching element is connected between the feed point connection end of the matching capacitor module and the ground, when the matching switch of the matching branch is turned off, the matching branch is in the disabled state.

12. The antenna assembly of claim 10, wherein, The matching capacitor module comprises an adjustable matching capacitor, and different matching parameter values of the matching unit are presented according to different matching branches in the enabled state and different capacitance values of the adjustable matching capacitor, so that the equivalent electrical lengths of the first radiation branch and the second radiation branch under the cooperation of the coupling branch and the matching unit meet the resonance in different sub-frequency bands of the low-frequency frequency band.

13. The antenna assembly of claim 12, wherein, The matching capacitor module further comprises a fixed value capacitor, and the fixed value capacitor is connected in parallel with the adjustable matching capacitor between the feed source and the feed point.

14. The antenna assembly of claim 3, wherein, The equivalent electrical length of the coupling branch is less than λ1 / 4, wherein λ1 is the wavelength corresponding to the preset frequency band.

15. An electronic device, comprising: The electronic device comprises the antenna assembly of any one of claims 1-14.

16. The electronic device of claim 15, wherein, The electronic device further comprises a frame, the first radiation branch and the coupling branch are metal segments arranged on the frame, and the second radiation branch is arranged on a side of the first radiation branch and the coupling branch facing an inner surface.

17. The electronic device of claim 16, wherein, The electronic device comprises a top end, a bottom end and two side ends, and the first radiation branch and the coupling branch are arranged on one of the side ends of the electronic device.

18. The electronic device of claim 17, wherein, The first radiation branch is closer to the top end of the electronic device than the coupling branch.

19. The electronic device of claim 17, wherein, The distance between the first coupling gap between the coupling branch and the first end of the first radiation branch and the bottom end is greater than or equal to a preset distance.

20. The electronic device of claim 19, wherein, The preset distance is 88 millimeters.

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