Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly. The antenna assembly comprises a feed source, a radiation branch knot and a parasitic branch knot. The radiation branch knot comprises a first feeding point, the first feeding point is connected with the first feed source, and the radiation branch knot is used for generating a first radiation current under excitation of the first feed source. The parasitic branch and the radiation branch are adjacent and arranged at intervals and are coupled with each other, the extension direction of the parasitic branch and the extension direction of the radiation branch are the same, and the parasitic branch and the radiation branch are arranged at intervals along the extension directions of the radiation branch and the parasitic branch; the first feed source is used for coupling and exciting the parasitic branch knot through the radiation branch knot to enable the parasitic branch knot to generate a second radiation current, the direction of the second radiation current is opposite to that of the first radiation current, and the radiation branch knot and the parasitic branch knot jointly support receiving and transmitting of the electromagnetic wave signals of the first frequency band. The invention further provides electronic equipment. According to the invention, directional radiation performance can be realized.

Description

Technical Field

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

[0002] At present, with the popularization of 5G and even 6G antennas, the number of antennas included in electronic devices is increasing. In the existing antenna design, the omnidirectionality of the directional pattern is generally emphasized, that is, the directional pattern in all directions is relatively balanced, which is conducive to the mobile phone receiving electromagnetic waves from all directions in space. Therefore, most of the existing mobile phone antennas lack directional radiation performance, that is, the directional pattern in a certain direction cannot be more prominent. As a result, the needs of certain application scenarios that require directional radiation cannot be met. For example, due to the large attenuation of signals on the sea surface, the communication between the crew and a fixed base station on land after going out to sea requires directional radiation of the mobile phone to resist the attenuation of the signal. At this time, the omnidirectional design of the directional pattern of existing electronic equipment will not be able to meet the requirements. Summary of the invention

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

[0004] In a first aspect, an antenna assembly is provided, comprising a feed source, a radiating branch, and a parasitic branch. The radiating branch comprises a first feed point, the first feed point is connected to the first feed source, and the radiating branch is used to generate a first radiation current under the excitation of the first feed source. The parasitic branch is adjacent to the radiating branch and is arranged at intervals, and is coupled with the radiating branch. The extension direction of the parasitic branch is the same as the extension direction of the radiating branch, and the parasitic branch and the radiating branch are arranged at intervals along the extension direction of the radiating branch and the parasitic branch. The first feed source is used to excite the parasitic branch through the radiating branch coupling so that the parasitic branch generates a second radiation current, wherein the radiating branch and the parasitic branch jointly support the transmission and reception of electromagnetic wave signals in the first frequency band, wherein the direction of the second radiation current is opposite to the direction of the first radiation current, so that the electromagnetic wave signal is radiated directionally.

[0005] In a second aspect, an electronic device is also provided, the electronic device comprising an antenna assembly, the antenna assembly comprising a feed source, a radiating branch and a parasitic branch. The radiating branch comprises a first feed point, the first feed point is connected to the first feed source, and the radiating branch is used to generate a first radiation current under the excitation of the first feed source. The parasitic branch is adjacent to the radiating branch and is arranged at intervals, and is coupled with the radiating branch. The extension direction of the parasitic branch is the same as the extension direction of the radiating branch, and the parasitic branch and the radiating branch are arranged at intervals along the extension direction of the radiating branch and the parasitic branch. The first feed source is used to excite the parasitic branch through the radiating branch coupling so that the parasitic branch generates a second radiation current, wherein the radiating branch and the parasitic branch jointly support the transmission and reception of electromagnetic wave signals in the first frequency band, wherein the direction of the second radiation current is opposite to the direction of the first radiation current, so that the electromagnetic wave signal is radiated directionally.

[0006] The antenna assembly and electronic device of the present application, by exciting the radiation branch to generate a first radiation current in the opposite direction to the second radiation current generated by the parasitic branch, will at least generate a radiation beam in a direction perpendicular to the first radiation current and a radiation beam in a direction perpendicular to the second radiation current. Since the directions of the two radiation currents are opposite, the two corresponding radiation beams will also be opposite, thereby weakening or even canceling the radiation beam in the direction perpendicular to the first radiation current and the second radiation current, and making the radiation beam in the radiation pattern roughly concentrated in a certain direction, that is, making the radiation direction of the electromagnetic wave signal mainly in the direction parallel to the first radiation current and the second radiation current, thereby effectively realizing directional radiation performance and meeting the needs of specific scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0008] Figure 1 Schematic diagram of the structure of an antenna assembly in one embodiment of the present application.

[0009] Figure 2 Schematic diagram of the structure and current distribution of an antenna assembly in one embodiment of the present application.

[0010] Figure 3 Another structural schematic diagram of the antenna assembly in some embodiments of the present application.

[0011] Figure 4 This is another structural schematic diagram of the antenna assembly in some embodiments of the present application.

[0012] Figure 5 This is another structural schematic diagram of the antenna assembly in some embodiments of the present application.

[0013] Figure 6 This is a schematic diagram of the first matching unit in some embodiments of the present application.

[0014] Figure 7 Schematic diagram of other structures of antenna assemblies in some embodiments of the present application.

[0015] Figure 8 This is a structural block diagram of an electronic device in some embodiments of the present application.

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

[0017] Fig.10 Schematic diagram of current distribution in partial areas of an antenna assembly and a ground plane of an electronic device in some embodiments of the present application.

[0018] Fig.11 It is a schematic plan view of a reference electronic device.

[0019] Fig.12 Schematic diagram of current distribution on the ground plane of the electronic device in some embodiments of the present application and the ground plane of the reference electronic device.

[0020] Fig.13 Schematic diagram of return loss and system total efficiency curve of electronic devices in some embodiments of the present application.

[0021] Fig.14 It is a three-dimensional schematic diagram of the directional diagram of the electronic device in some embodiments of the present application.

[0022] Fig.15 It is a plan view schematic diagram of the directional diagram of the electronic device in some embodiments of the present application.

[0023] Fig.16 A schematic diagram of the directivity coefficient of an electronic device in some embodiments of the present application.

[0024] Fig.17 Another schematic plan view of an electronic device in some embodiments of the present application.

[0025] Fig.18 It is another schematic plan view of an electronic device in some embodiments of the present application.

[0026] Fig.19 Another schematic diagram of the first matching unit in some embodiments of the present application.

[0027] Fig. 20Schematic diagram of another return loss and system total efficiency curve of an electronic device in some embodiments of the present application.

[0028] Fig.21 Another stereoscopic schematic diagram of the directional diagram of the electronic device in some embodiments of the present application.

[0029] Fig. 22 It is a plan view schematic diagram of the directional diagram of the electronic device in some embodiments of the present application.

[0030] Fig.23 This is another schematic diagram of the directivity coefficient of an electronic device in some embodiments of the present application.

[0031] Fig.24 It is another schematic plan view of the electronic device in some embodiments of the present application.

[0032] Fig.25 Schematic diagram of a return loss and isolation curve of an electronic device in some embodiments of the present application.

[0033] Fig.26 This is another schematic diagram of the total system efficiency of the electronic device in some embodiments of the present application.

[0034] Fig. 27 This is another stereoscopic schematic diagram of the directional diagram of the electronic device in some embodiments of the present application.

[0035] Fig.28 It is a plan view schematic diagram of the directional diagram of the electronic device in some embodiments of the present application.

[0036] Fig.29 This is another schematic diagram of the directivity coefficient of the electronic device in some embodiments of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "thickness", "width", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than implying or indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "connection" in this application includes the meanings of physical structural connection, electrical connection, direct connection or indirect connection, and can be determined specifically according to the required connection situation. In the description of the embodiments of the present invention, the terms "first", "second", etc. are not specific, but are used to distinguish objects with the same name. If there is a description in the specification, the objects with the same name referred to by the terms "first", "second", etc. may be the same objects.

[0039] See also Figure 1 , is a schematic diagram of the structure of the antenna assembly 1 in an embodiment of the present application. Figure 1 As shown, the antenna assembly 1 includes a first feed source 11, a radiation branch 12 and a parasitic branch 13. The radiation branch 12 includes a first feed point F1, the first feed point F1 is connected to the first feed source 11, and the radiation branch 12 is used to generate a first radiation current under the excitation of the first feed source 11. The parasitic branch 13 is adjacent to and spaced from the radiating branch 12, and is coupled to the radiating branch 12. The extension direction of the parasitic branch 13 is the same as the extension direction of the radiating branch 12, and the parasitic branch 13 and the radiating branch 12 are spaced apart along the extension directions of the radiating branch 12 and the parasitic branch 13. The first feed source 11 is used to couple and excite the parasitic branch 13 through the radiating branch 12 so that the parasitic branch 13 generates a second radiation current, wherein the radiating branch 12 and the parasitic branch 13 jointly support the transmission and reception of electromagnetic wave signals in the first frequency band, wherein the direction of the second radiation current is opposite to the direction of the first radiation current so that the electromagnetic wave signal is directionally radiated.

[0040] Thus, the antenna assembly 1 in the present application, by exciting the radiation branch 12 to generate a first radiation current in the opposite direction to the second radiation current generated by the parasitic branch 13, will at least generate a radiation beam in a direction perpendicular to the first radiation current and a radiation beam in a direction perpendicular to the second radiation current. Since the directions of the two radiation currents are opposite, the two corresponding radiation beams will also be opposite, thereby weakening or even canceling the radiation beam in the direction perpendicular to the first radiation current and the second radiation current, and making the radiation beam in the radiation pattern roughly concentrated in a certain direction, that is, making the radiation direction of the electromagnetic wave signal mainly in the direction parallel to the first radiation current and the second radiation current, thereby effectively realizing directional radiation performance and meeting the needs of specific scenarios.

[0041] Among them, the radiation beam corresponds to the radiation energy. Generally speaking, the total radiation energy of the electromagnetic wave signal is fixed. When the radiation energy in some directions decreases, the radiation energy in other directions will increase, that is, the radiation pattern will be more obviously biased towards the direction with more radiation energy. Therefore, the antenna component 1 of the present application can weaken or even offset the radiation beam in the direction perpendicular to the first radiation current and the second radiation current, and make the radiation pattern roughly concentrated in the direction parallel to the first radiation current and the second radiation current, that is, the radiation direction of the electromagnetic wave signal is mainly in the direction parallel to the first radiation current and the second radiation current.

[0042] In addition, generally speaking, the radiation current on the antenna branch will at least generate a radiation beam perpendicular to the direction of the radiation current, and the relationship between the radiation beam and the direction of the radiation current can roughly satisfy the left-hand rule or the right-hand rule, for example, the fingers are spread out, the palm faces a fixed direction, and the four fingers face the direction of the radiation current, and the thumb faces the direction of a certain radiation beam generated under the radiation current. Therefore, since the first radiation current and the second radiation current are opposite, the directions of the radiation beams in the directions perpendicular to the first radiation current and the second radiation current are also opposite.

[0043] Among them, in the present application, the extension direction of the parasitic branch 13 is the same as the extension direction of the radiating branch 12, which is not the same in a strict sense, but can be roughly the same. For example, the angle between the extension direction of the parasitic branch 13 and the extension direction of the radiating branch 12 can be considered the same within a preset angle range (for example, -15° to 15°). In addition, in the present application, the extension direction of the parasitic branch 13 is the same as the extension direction of the radiating branch 12, and it can also include the situation that the extension direction of a larger part (for example, more than 60%) of the parasitic branch 13 is the same as the extension direction of a larger part (for example, more than 60%) of the radiating branch 12, and it is not required that the extension directions of the entire parasitic branch 13 and the entire radiating branch 12 are the same.

[0044] In some embodiments, Figure 1 As shown, the radiating branches 12 and the parasitic branches 13 are both straight bars, and the extension direction of the radiating branches 12 and the parasitic branches 13 is the length direction of the radiating branches 12 and the parasitic branches 13, that is, the extension direction of the longest sides of the radiating branches 12 and the parasitic branches 13.

[0045] In some embodiments, Figure 1 As shown, the parasitic branch 13 includes a grounding end G1 and an open end O1 opposite to each other. The grounding end G1 of the parasitic branch 13 is adjacent to and spaced from the radiation branch 12 , and the grounding end G1 is used for grounding.

[0046] That is, in some embodiments, one end of the two ends of the parasitic branch 13 is grounded, and the other end is an open end, and specifically, the ground end G1 is adjacent to and spaced from the radiation branch 12 .

[0047] Please also read Figure 2 , is a schematic diagram of the structure and current distribution of the antenna assembly 1 in an embodiment of the present application. In some embodiments, Figure 1 and Figure 2 As shown, the radiation branch 12 includes a first end D1 and a second end D2 opposite to each other. The first end D1 is an open end, and the ground end G1 of the parasitic branch 13 is adjacent to and spaced from the first end D1 of the radiation branch 12 which is an open end.

[0048] Among them, Figure 2As shown, the radiation branch 12 generates a first radiation current i1 under the excitation of the feed source 11, and the direction of the first radiation current i1 is from the second end D2 of the radiation branch 12 to the first end D1, and the feed source 11 couples and excites the parasitic branch 13 through the radiation branch 12 so that the parasitic branch 13 generates a second radiation current i2, and the direction of the second radiation current i2 is from the open-circuit end O1 of the parasitic branch 13 to the ground end G1. Since the radiation branch 12 and the parasitic branch 13 have the same extension direction, and the first end D1 of the radiation branch 12 and the ground end G1 of the parasitic branch 13 are adjacent and spaced apart, and the second end D2 of the radiation branch 12 and the open end O1 of the parasitic branch are relatively far apart, the direction from the second end D2 of the radiation branch 12 to the first end D1 is opposite to the direction from the open end O1 of the parasitic branch 13 to the ground end G1, and thus the directions of the first radiation current i1 and the second radiation current i2 will be opposite.

[0049] Among them, the direction of the first radiation current i1 is from the second end D2 of the radiation branch 12 to the first end D1, and the direction of the second radiation current i2 is from the open end O1 of the parasitic branch 13 to the ground end G1. Therefore, they are the same as the extension direction of the radiation branch 12 and the parasitic branch 13. The aforementioned radiation beam in the direction perpendicular to the first radiation current and the radiation beam in the direction perpendicular to the second radiation current are actually perpendicular to the extension direction of the radiation branch 12 and the parasitic branch 13, and the directions of the two are opposite. As a result, the radiation pattern will be roughly concentrated in the direction parallel to the extension direction of the radiation branch 12 and the parasitic branch 13, that is, mainly in the direction parallel to the extension direction of the radiation branch 12 and the parasitic branch 13.

[0050] In this application, "A" and "B" are adjacent and spaced apart, which means that the distance between "A" and "B" is less than a preset distance, such as 1 cm, and they are spaced apart from each other. The spacing between the radiation branch 12 and the parasitic branch 13 can be any spacing that satisfies the coupling between the two.

[0051] In some embodiments, the electrical length of the radiation branch 12 and the electrical length of the parasitic branch 13 are both λ / 4, where λ is the wavelength corresponding to the first frequency band.

[0052] Therefore, since the electrical length of the radiation branch 12 and the electrical length of the parasitic branch 13 are both λ / 4, they can resonate in the first frequency band, thereby achieving double resonance and effectively improving the overall radiation performance. In addition, since the electrical length of the radiation branch 12 is equal to the electrical length of the parasitic branch 13, the amplitudes of the two radiation beams perpendicular to the first radiation current i1 and the second radiation current i2 are substantially the same, and since the directions are opposite, they can better cancel each other out, so that the radiation energy is more concentrated in another direction, that is, the radiation pattern is mainly biased towards another direction, such as a direction parallel to the first radiation current i1 and the second radiation current i2.

[0053] In some embodiments, for two antenna branches arranged at intervals, when the directions of the currents generated by the two antenna branches after being excited are substantially opposite, the balanced mode can be effectively excited, that is, the condition for working in the balanced mode is met at this time. Therefore, in the present application, the directions of the first radiation current i1 and the second radiation current i2 are substantially opposite, and the parasitic branch 13 and the radiation branch 12 jointly support the reception and transmission of electromagnetic wave signals in the first frequency band, which also means that the parasitic branch 13 and the radiation branch 12 jointly work in the balanced mode to support the reception and transmission of electromagnetic wave signals in the first frequency band.

[0054] Among them, Figure 1 and Figure 2 As shown, in some embodiments, the second end D2 of the radiation branch 12 is grounded, and the first feeding point F1 of the radiation branch 12 is located between the first end D1 and the second end D2 of the radiation branch 12 .

[0055] That is, in some embodiments, the second end D2 of the radiation branch 12 is specifically a ground end, and the first feeding point F1 of the radiation branch 12 is located between the first end D1 and the second end D2 of the radiation branch 12. Thus, the radiation branch 12 forms an inverted F antenna (IFA).

[0056] Among them, for the inverted F antenna, the radiating branch 12 will generate the first radiation current from the second end D2 to the first end D1 as described above under the excitation of the first feed source 11, which is opposite to the direction of the second radiation current from the open end O1 to the ground end G1 generated by the parasitic branch 13 under the coupling excitation of the first feed source 11.

[0057] See also Figure 3 , is another schematic diagram of the structure of the antenna assembly 1 in some embodiments of the present application. Figure 3As shown, the second end D2 of the radiation branch 12 is an open end, and the first feeding point F1 is disposed at the second end D2.

[0058] That is, in some embodiments, the second end D2 of the radiation branch 12 is also an open end, and the first feeding point F1 is set at the second end D2, so that the first feed source 11 is fed through the second end D2. At this time, the radiation branch 12 forms a monopole antenna.

[0059] Among them, for the monopole antenna, since the first feeding point F1 is set at the second end D2, the radiating branch 12 will also generate the first radiation current from the second end D2 to the first end D1 as mentioned above under the excitation of the first feed source 11, and the direction is opposite to the second radiation current from the open end O1 to the ground end G1 generated by the parasitic branch 13 under the coupling excitation of the first feed source 11.

[0060] in, Figure 3 The antenna assembly 1 shown in FIG. Figure 1-Figure 2 The difference between the antenna assembly 1 shown in the figure is that the second end D2 of the radiation branch 12 is an open end, and the first feeding point F1 is arranged at the second end D2. Figure 1-Figure 2 The antenna assembly 1 shown is the same as that shown in FIG. Figure 1-Figure 2 Relevant description of the antenna assembly 1 shown.

[0061] In the present application, the electrical length of the radiation branch 12 and the electrical length of the parasitic branch 13 may be the electrical length of the radiation branch 12 and the parasitic branch 13, respectively, for example, they may be substantially equal to the length of the radiation branch 12 and the length of the parasitic branch 13, respectively. In some embodiments, when the electrical length of the radiation branch 12 and the parasitic branch 13 are also connected to a matching unit for achieving matching adjustment, the electrical length of the radiation branch 12 and the parasitic branch 13 may also be an equivalent electrical length under the cooperation of the connected matching unit.

[0062] In some embodiments, Figure 1-Figure 3 In the antenna assembly 1 shown, the length of the radiation branch 12 and the length of the parasitic branch 13 are respectively equal to the electrical length of the radiation branch 12 and the electrical length of the parasitic branch 13 , which are both λ / 4.

[0063] That is, in some embodiments, the antenna assembly 1 may not include a matching unit connected to the radiation branch 12 or the parasitic branch 13, and the electrical lengths of the radiation branch 12 and the parasitic branch 13 may be the electrical lengths of the radiation branch 12 and the parasitic branch 13 themselves, respectively. For the antenna branch, when there is no matching unit, the electrical length of the antenna branch is usually equal to the length of the antenna branch. Therefore, in some embodiments, the length of the radiation branch 12 and the length of the parasitic branch 13 are respectively equal to the electrical length of the radiation branch 12 and the electrical length of the parasitic branch 13, both of which are λ / 4, and the electrical length is λ / 4 by itself.

[0064] Wherein, as mentioned above, in some embodiments, Figure 1-Figure 3 As shown, the radiation branch 12 and the parasitic branch 13 are in the shape of straight bars, and the length of the radiation branch 12 or the parasitic branch 13 is the dimension in the extension direction of the longest side of the radiation branch 12 or the parasitic branch 13 .

[0065] See also Figure 4 , is another schematic diagram of the structure of the antenna assembly 1 in some embodiments of the present application. Figure 4 As shown, the parasitic branch 13 includes a grounded end G1 and an open-circuit end O1 opposite to each other. The grounded end G1 of the parasitic branch 13 is adjacent to and spaced from the radiation branch 12. The grounded end G1 is used for grounding. The first end D1 of the radiation branch 12 is an open-circuit end, and the second end D2 is grounded. The first feeding point F1 of the radiation branch 12 is located between the first end D1 and the second end D2 of the radiation branch 12. Figure 4 As shown, the antenna assembly 1 also includes a first matching unit 14 and a second matching unit 15. The first matching unit 14 is connected between the first feed source 11 and the first feeding point F1 of the radiating branch 12, and the second matching unit 15 is connected between the ground terminal G1 of the parasitic branch 13 and the ground. The equivalent electrical length of the radiating branch 12 in cooperation with the first matching unit 14 is λ / 4, and the equivalent electrical length of the parasitic branch 13 in cooperation with the second matching unit 15 is λ / 4.

[0066] That is, in some embodiments, the antenna assembly 1 is Figure 1-Figure 2On the basis of the structure shown, it can also include a first matching unit 14 and a second matching unit 15, and the first matching unit 14 is connected between the first feed source 11 and the first feeding point F1 of the radiating branch 12, and the second matching unit 15 is connected between the ground terminal G1 of the parasitic branch 13 and the ground, and the radiating branch 12 specifically has an equivalent electrical length of λ / 4 under the cooperation of the first matching unit 14, and the parasitic branch 13 specifically has an equivalent electrical length of λ / 4 under the cooperation of the second matching unit 15.

[0067] Furthermore, the electrical lengths of the radiation branch 12 and the parasitic branch 13 may be equivalent electrical lengths in cooperation with the connected matching unit.

[0068] In some embodiments, the lengths of the radiation branches 12 and the parasitic branches 13 are both less than λ / 4.

[0069] Among them, since the matching unit can be equivalent to a part of the electrical length, the electrical length of the radiation branch 12 and the parasitic branch 13 can be less than λ / 4, so that when the length of the radiation branch 12 and the length of the parasitic branch 13 are both less than λ / 4, through the cooperation of the corresponding matching unit, the electrical length of the radiation branch 12 and the electrical length of the parasitic branch 13 can still be λ / 4, meeting the requirement of resonance in the preset frequency band. Since the length of the radiation branch 12 and the length of the parasitic branch 13 are both less than λ / 4, the length of the radiation branch 12 and the size of the parasitic branch 13 are effectively reduced, which can reduce the space occupied by the antenna component 1.

[0070] in, Figure 4 The antenna assembly 1 shown is Figure 1-Figure 2 The difference between the antenna assembly 1 shown in the figure is that it also includes a first matching unit 14 and a second matching unit 15. The other structures are the same as those of the antenna assembly 1 shown in the figure. Figure 1-Figure 2 The antenna assembly 1 shown is the same as that shown in FIG. Figure 1-Figure 2 Relevant description of the antenna assembly 1 shown.

[0071] See also Figure 5 , is another structural diagram of the antenna assembly 1 in some embodiments of the present application. Figure 5 As shown, the parasitic branch 13 includes a grounding end G1 and an open-circuit end O1 opposite to each other. The grounding end G1 of the parasitic branch 13 is adjacent to and spaced from the radiation branch 12. The grounding end G1 is used for grounding. The second end D2 of the radiation branch 12 is an open-circuit end, and the first feeding point F1 is set at the second end D2. Figure 5As shown, the antenna assembly 1 also includes a first matching unit 14 and a second matching unit 15. The first matching unit 14 is connected between the first feed source 11 and the first feeding point F1 of the radiating branch 12, and the second matching unit 15 is connected between the ground terminal G1 of the parasitic branch 13 and the ground. The equivalent electrical length of the radiating branch 12 in cooperation with the first matching unit 14 is λ / 4, and the equivalent electrical length of the parasitic branch 13 in cooperation with the second matching unit 15 is λ / 4.

[0072] That is, in some embodiments, the antenna assembly 1 is Figure 3 On the basis of the structure shown, it can also include a first matching unit 14 and a second matching unit 15, and the first matching unit 14 is connected between the first feed source 11 and the first feeding point F1 of the radiating branch 12, and the second matching unit 15 is connected between the ground terminal G1 of the parasitic branch 13 and the ground, and the radiating branch 12 specifically has an equivalent electrical length of λ / 4 under the cooperation of the first matching unit 14, and the parasitic branch 13 specifically has an equivalent electrical length of λ / 4 under the cooperation of the second matching unit 15.

[0073] Furthermore, in Figure 3 In the structure shown, the electrical lengths of the radiation branch 12 and the parasitic branch 13 may also be equivalent electrical lengths in cooperation with the connected matching unit.

[0074] In some embodiments, the lengths of the radiation branch 12 and the parasitic branch 13 are both less than λ / 4, thereby effectively reducing the length of the radiation branch 12 and the size of the parasitic branch 13, and reducing the space occupied by the antenna assembly 1.

[0075] in, Figure 5 The antenna assembly 1 shown is Figure 3 The difference between the antenna assembly 1 shown in the figure is that it also includes a first matching unit 14 and a second matching unit 15. The other structures are the same as those of the antenna assembly 1 shown in the figure. Figure 3 Same, in addition, Figure 5 The antenna assembly 1 shown is Figure 1-Figure 2 The difference of the antenna assembly 1 shown in the figure is that the second end D2 of the radiation branch 12 is an open end, and the first feeding point F1 is arranged at the second end D2. Figure 1-Figure 2 The antenna assembly 1 shown is the same, so more details can also be found in Figure 1-Figure 3 Relevant description of the antenna assembly 1 shown.

[0076] Wherein, in some embodiments, Figure 4 and Figure 5In the structure shown, after adding the first matching unit 14 and the second matching unit 15, the lengths of the radiation branch 12 and the parasitic branch 13 are both less than λ / 4, and in some embodiments, the lengths of the radiation branch 12 and the parasitic branch 13 may be λ / 8 or even smaller.

[0077] In some embodiments, after adding the first matching unit 14 and the second matching unit 15, the lengths of the radiation branch 12 and the parasitic branch 13 may be the same or different, as long as the equivalent electrical length of the radiation branch 12 in cooperation with the first matching unit 14 is λ / 4, and the equivalent electrical length of the parasitic branch 13 in cooperation with the second matching unit 15 is also λ / 4. In some embodiments, after adding the first matching unit 14 and the second matching unit 15, when the lengths of the radiation branch 12 and the parasitic branch 13 are different, the equivalent electrical lengths of the first matching unit 14 and the second matching unit 15 are different, and when the lengths of the radiation branch 12 and the parasitic branch 13 are the same, the equivalent electrical lengths of the first matching unit 14 and the second matching unit 15 are the same.

[0078] Among them, in some embodiments, the antenna component 1 may also include only one of the first matching unit 14 and the second matching unit 15. For example, the antenna component 1 may include only the first matching unit 14, the first matching unit 14 is connected between the first feed source 11 and the first feeding point F1 of the radiation branch 12, and the grounding end G1 of the parasitic branch 13 is directly grounded. Specifically, the radiation branch 12 has an equivalent electrical length of λ / 4 under the cooperation of the first matching unit 14, and the electrical length of the parasitic branch 13 itself is λ / 4. In this way, it can still ensure that the electrical length of the radiation branch 12 and the electrical length of the parasitic branch 13 are λ / 4, which meets the requirement of resonance in the preset frequency band. And the number of matching units can be reduced as needed, and the considerations of size and cost can be balanced.

[0079] The first matching unit 14 and the second matching unit 15 may include a plurality of capacitors and / or inductors to achieve corresponding matching adjustments.

[0080] See also Figure 6 , is a schematic diagram of the first matching unit 14 in some embodiments of the present application. Figure 6As shown, the first matching unit 14 may include an inductor L11, a capacitor C11, an inductor L12 and a capacitor C12, wherein the inductor L11 and the capacitor C11 are connected in parallel, the inductor L12 and the capacitor C12 are connected in parallel, and then the inductor L11 and the capacitor C11 connected in parallel and the inductor L12 and the capacitor C12 connected in parallel are connected in series between the first feeding point F1 and the first feed source 11.

[0081] in, Figure 6 This is just an example, and the first matching unit 14 may also include other structures, such as inductors and capacitors connected in parallel, or inductors and capacitors connected in series, or a structure in which an inductor and a capacitor are connected in parallel and then connected in series with an inductor or a capacitor, or a structure in which a series branch of a capacitor and an inductor are connected in series with a capacitor or / inductor in parallel, and so on.

[0082] The structure of the second matching unit 15 may be the same as that of the first matching unit 14, that is, the structure of the second matching unit 15 may be that the inductor L11 and the capacitor C11 connected in parallel and the inductor L12 and the capacitor C12 connected in parallel are connected in series between the ground terminal G1 and the ground. Figure 6 The related structure of the first matching unit 14 described in .

[0083] See also Figure 7 , which is a schematic diagram of other structures of the antenna assembly 1 in some embodiments of the present application. Figure 7 As shown, in some embodiments, the antenna assembly 1 also includes a second feed source 16 and a third matching unit 17, the parasitic branch 13 includes a second feeding point F2, the second feed source 16 is connected to the second feeding point F2 through the third matching unit 17, and the parasitic branch 13 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 16.

[0084] That is, in some embodiments, the antenna assembly 1 also includes a second feed source 16 and a third matching unit 17, and the parasitic branch 13 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 16, thereby effectively improving the frequency band supported by the antenna assembly 1 and meeting the requirements of multiple antenna frequency bands.

[0085] Among them, Figure 7As shown, the second feeding point F2 is located between the ground terminal G1 and the open circuit terminal O1 of the parasitic branch 13. At this time, the parasitic branch 13 can also form an IFA antenna. Wherein, no matter the electrical length of the parasitic branch 13 is originally λ / 4, or the equivalent electrical length is λ / 4 under the cooperation of the second matching unit 15, through the third matching unit 17, the electrical length of the parasitic branch 13 under the cooperation of the third matching unit 17 can also be 1 / 4 of the wavelength corresponding to the electromagnetic wave signal of the second frequency band, thereby further supporting the transmission and reception of the electromagnetic wave signal of the second frequency band.

[0086] In the present application, λ may specifically be the wavelength corresponding to the center frequency of the first frequency band, and the wavelength corresponding to the electromagnetic wave signal of the second frequency band may specifically be the wavelength corresponding to the center frequency of the second frequency band.

[0087] in, Figure 7 The antenna component 1 is based on Figure 1-Figure 2 The structure shown is illustrated by taking an example where a second feed source 16 and a third matching unit 17 are added to the structure shown.

[0088] Obviously, a second feed source 16 and a third matching unit 17 can be further added to the antenna assembly 1 shown in any of the aforementioned figures, and the second feed source 16 is connected to the second feeding point F2 of the parasitic branch 13 through the third matching unit 17, so as to further support the transmission and reception of electromagnetic wave signals in the second frequency band.

[0089] In some embodiments, the third matching unit 17 can also be used to implement bandpass filtering to filter out electromagnetic wave signals other than the electromagnetic wave signals in the second frequency band. That is, the third matching unit 17 is used to allow the electromagnetic wave signals in the second frequency band to pass through, while preventing the electromagnetic wave signals in other frequency bands from passing through, for example, preventing the electromagnetic wave signals in the first frequency band from passing through, thereby avoiding interference between the electromagnetic wave signals in the first frequency band and the second frequency band.

[0090] In some embodiments, the third matching unit 17 may also include a plurality of capacitors and / or inductors, and the structures of the plurality of capacitors and / or inductors, as well as the capacitance values ​​and / or inductance values ​​are designed to allow signals of the second frequency band to pass through while preventing signals of other frequency bands from passing through.

[0091] For example, the structure of the third matching unit 17 may be the same as that of the first matching unit 14 , except that the capacitance and inductance values ​​are different.

[0092] In some embodiments, when the antenna assembly 1 further includes the second matching unit 15, the second matching unit 15 can also be further used to implement bandpass filtering, for filtering out electromagnetic wave signals other than the electromagnetic wave signals in the first frequency band. That is, the second matching unit 15 is used to allow electromagnetic wave signals in the first frequency band to pass through, while preventing electromagnetic wave signals in other frequency bands from passing through, for example, preventing electromagnetic wave signals in the second frequency band from passing through, thereby further avoiding interference between electromagnetic wave signals in the first frequency band and the second frequency band.

[0093] The radiation branches 12 and the parasitic branches 13 can be made of conductive materials such as metal materials.

[0094] In some embodiments, the first frequency band may be an MHB (medium and high frequency) frequency band, for example, specifically, a B3 frequency band in the MHB frequency band (frequency range is 1710MHz-1880Mhz, and the resonant frequency is approximately 1.86GHz). In other embodiments, the first frequency band may also be any other frequency band, for example, a medium frequency band, a low frequency band, a high frequency band such as N78, N79, etc. Among them, the second frequency band may be any other frequency band other than the first frequency band.

[0095] In some embodiments, the first feed point F1 can be connected to the first feed source 11 through a feed connector. The feed connector can be a feed spring, a coaxial line, an FPC (flexible printed circuit), etc. The ground terminal G1 can also be electrically connected to the ground through a ground connector. The ground connector can also be a feed spring, a coaxial line, an FPC (flexible printed circuit), etc. When the antenna assembly 1 also includes a second feed source 16 and the parasitic branch 13 also includes a second feed point F2, the second feed point F2 can also be connected to the second feed source 16 through a feed connector.

[0096] Thus, the antenna assembly 1 of the present application, by exciting the radiation branch 12 to generate a first radiation current in the opposite direction to the second radiation current generated by the parasitic branch 13, will at least generate a radiation beam in a direction perpendicular to the first radiation current and a radiation beam in a direction perpendicular to the second radiation current. Since the directions of the two radiation currents are opposite, the two corresponding radiation beams will also be opposite, thereby weakening or even canceling the radiation beam in the direction perpendicular to the first radiation current and the second radiation current, and making the radiation beam in the radiation pattern roughly concentrated in a certain direction, that is, making the radiation direction of the electromagnetic wave signal mainly in the direction parallel to the first radiation current and the second radiation current, thereby effectively realizing directional radiation performance and meeting the needs of specific scenarios.

[0097] See also Figure 8, is a structural block diagram of an electronic device 100 in some embodiments of the present application. Figure 8 As shown, the electronic device 100 may include the antenna assembly 1 described in any of the above embodiments. Thus, the electronic device 100 is equipped with the antenna assembly 1 in any of the above embodiments, and the first radiation current generated by the radiating branch 12 is stimulated to be opposite to the direction of the second radiation current generated by the parasitic branch 13, and at least a radiation beam in a direction perpendicular to the first radiation current and a radiation beam in a direction perpendicular to the second radiation current are generated. Since the directions of the two radiation currents are opposite, the two corresponding radiation beams are also opposite, thereby weakening or even canceling the radiation beam in a direction perpendicular to the first radiation current and the second radiation current, and making the radiation beam in the directional pattern roughly concentrated in a certain direction, that is, making the radiation direction of the electromagnetic wave signal mainly toward the direction parallel to the first radiation current and the second radiation current, thereby effectively realizing directional radiation performance and meeting the needs of specific scenarios.

[0098] See also Fig. 9 , is a schematic plan view of an electronic device 100 in some embodiments of the present application. Fig. 9 FIG. 1 is a top view schematically showing the structure of the antenna assembly 1 viewed from the back side of the electronic device 100, that is, the side away from the display screen. Figure 1-Figure 7 The antenna assembly 1 shown in the above figures may also be the antenna assembly 1 viewed from the back side of the electronic device 100 .

[0099] in, Fig. 9 The electronic device 100 shown includes Figure 1 The antenna assembly 1 shown is used as an example. Fig. 9 As shown, the electronic device 100 includes two opposite short sides D11 and two long sides D12 , and the radiation branch 12 and the parasitic branch 13 are arranged at a position close to one of the short sides D11 of the same long side D12 of the electronic device 100 .

[0100] As mentioned above, the direction of the first radiation current i1 is from the second end D2 of the radiation branch 12 to the first end D1, and the direction of the second radiation current i2 is from the open end O1 of the parasitic branch 13 to the ground end G1. Therefore, both are the same as the extension direction of the radiation branch 12 and the parasitic branch 13. The aforementioned radiation beam in the direction perpendicular to the first radiation current and the radiation beam in the direction perpendicular to the second radiation current are actually perpendicular to the extension direction of the radiation branch 12 and the parasitic branch 13, and the directions of the two are opposite. Therefore, the radiation beam in the direction perpendicular to the extension direction of the radiation branch 12 and the parasitic branch 13 can be weakened or even offset, so that the radiation pattern is roughly concentrated in the direction parallel to the extension direction of the radiation branch 12 and the parasitic branch 13, that is, mainly in the direction parallel to the extension direction of the radiation branch 12 and the parasitic branch 13.

[0101] In addition, the radiation beams in two relative directions cancel each other out, which actually makes the entire directional pattern concave in the two relative directions, that is, in the two relative directions perpendicular to the extension directions of the radiation branch 12 and the parasitic branch 13. When the radiation branch 12 and the parasitic branch 13 are arranged at the same long side end D12 of the electronic device 100, close to one of the short side ends D11, the radiation beams on the side of the short side end D11 close to the radiation branch 12 and the parasitic branch 13 are also squeezed, so that the radiation energy is mainly directed from the side of the short side end D11 close to the radiation branch 12 and the parasitic branch 13 toward the other short side end D11 away from the radiation branch 12 and the parasitic branch 13. The directional pattern can be directed to the other short side end D11 away from the radiation branch 12 and the parasitic branch 13, achieving better directional radiation performance.

[0102] In some embodiments, the electronic device 100 includes a top end D11a, a bottom end D11b, and two side ends D12a and D12b. The two short sides D11 of the electronic device 100 are the top end D11a and the bottom end D11b, and the two long sides D12 of the electronic device 100 are the two side ends D12a and D12b.

[0103] Among them, Fig. 9 As shown, the radiation branch 12 and the parasitic branch 13 can be arranged on one of the side ends D12b and close to the top end D11a, so that the directional pattern can be mainly directed to the direction of one side of the bottom end D11b.

[0104] Among them, the directional terms such as "top" and "bottom" used in the embodiments of the present application to describe the electronic device 100 are mainly explained based on the orientation when the user holds the electronic device 100 and uses it. The position toward the top side of the electronic device 100 is the "top", and the position toward the bottom side of the electronic device 100 is the "bottom". It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the orientation of the electronic device 100 in actual application scenarios. In some embodiments, the bottom end D11b of the electronic device 100 is the end where the headphone jack and the USB port are provided, and the top end D11a of the electronic device 100 is the other end opposite to the end where the headphone jack and the USB port are provided, and may also refer to the end where a camera, a receiver, etc. are provided.

[0105] Among them, Fig. 9 As shown, the radiation branch 12 and the parasitic branch 13 are both straight strips, and the radiation branch 12 and the parasitic branch 13 are parallel to the end surface of the side end D12b. The first radiation current on the radiation branch 12 and the second radiation current on the parasitic branch 13 are both roughly parallel to the end surface of the side end D13. Figure 1-Figure 7 The antenna assembly 1 in the figure may specifically be a schematic diagram of the electronic device 100 being in a vertical screen state.

[0106] in, Fig. 9 The electronic device 100 in Figure 1 The antenna assembly 1 shown in FIG. 1 is used as an example. As mentioned above, the electronic device 100 may include the antenna assembly 1 in any of the above embodiments, for example, it may also include Figure 3-Figure 5 as well as Figure 7 The antenna assembly 1 shown in any of the accompanying drawings.

[0107] Among them, Fig. 9As shown, the electronic device 100 also includes a grounding plate 101, which includes two opposite short sides 101a and two long sides 101b, wherein the two short sides 101a can be close to and parallel to the two short side ends D11 of the electronic device 100, and the two long sides 101b can be close to and parallel to the two long side ends D12 of the electronic device 100, respectively. Among them, the radiation branch 12 and the parasitic branch 13 are arranged adjacent to a long side 101b of the grounding plate 101, and the extension direction of the radiation branch 12 and the parasitic branch 13 is parallel to the long side 101b of the grounding plate 101. The radiation branch 12 generates a first radiation current under the excitation of the first feed source 11, and couples to excite the grounding plate 101 to generate a third radiation current along the direction of the long side 101b. The parasitic branch 13 generates a second radiation current under the coupling excitation of the first feed source 11, and couples to excite the grounding plate 101 to generate a fourth radiation current along the direction of the long side 101b. The fourth radiation current is opposite to the direction of the third radiation current, and both are parallel to the long side 101b, that is, parallel to the extension direction of the radiation branch 12 and the parasitic branch 13.

[0108] That is, in some embodiments, not only the first radiation current and the second radiation current with opposite directions are respectively generated in the radiation branch 12 and the parasitic branch 13, but the third radiation current and the fourth radiation current with opposite directions are also generated in the grounding plate 101, and both are parallel to the extension directions of the radiation branch 12 and the parasitic branch 13, which can further effectively offset the radiation beam perpendicular to the extension directions of the radiation branch 12 and the parasitic branch 13, and can make the radiation pattern show a more obvious depression in these two relative directions, so that the radiation energy is more concentratedly directed to the other short side end D11 away from the radiation branch 12 and the parasitic branch 13.

[0109] See also Fig.10 , which is a schematic diagram of current distribution in partial areas of the antenna assembly 1 and the ground plane 101 of the electronic device 100 in some embodiments of the present application.

[0110] Among them, the aforementioned Fig. 9 is a schematic diagram of the electronic device 100 when placed in portrait orientation, Fig.10 1 is a schematic diagram of the electronic device 100 when placed in landscape orientation. Fig.10As shown, the radiation branch 12 generates a first radiation current i1 under the excitation of the feed source 11, and the feed source 11 couples and excites the parasitic branch 13 through the radiation branch 12 so that the parasitic branch 13 generates a second radiation current i2, and the first radiation current i1 is opposite to the second radiation current i2. In addition, the radiation branch 12 also couples and excites the grounding plate 101 to generate a third radiation current i3 along the long side 101b, and the direction of the third radiation current i3 is opposite to the direction of the first radiation current i1. The parasitic branch 13 also couples and excites the grounding plate 101 to generate a fourth radiation current i4 along the long side 101b, and the direction of the fourth radiation current i4 is opposite to the direction of the second radiation current i2, so that the directions of the third radiation current i3 and the fourth radiation current i4 are also opposite. Thereby, the radiation energy can be more concentrated and directed to the other short side end D11 away from the radiation branch 12 and the parasitic branch 13.

[0111] In some embodiments, the grounding plate 101 may be a middle frame, used as the whole ground of the electronic device 100 to provide a ground potential. The grounding terminal G1 and the like may be connected to the middle frame 2 to be grounded.

[0112] Among them, as mentioned above, Fig. 9This is just an example. Obviously, in some embodiments, the radiation branch 12 and the parasitic branch 13 may also be arranged at a position close to the bottom end D11b of the side end D13 of the electronic device 100. In some embodiments, the radiation branch 12 and the parasitic branch 13 may also be arranged at a position close to one of the long sides D12 of the same short side end D11 of the electronic device 100, for example, they may be arranged at a position close to the side end D12a of the top end D11a of the electronic device 100, so that the directional pattern can be mainly oriented in the direction from the side end D12a to the side end D12b. That is, in some embodiments, the radiation branch 12 and the parasitic branch 13 may also be arranged adjacent to a short side 101a of the grounding plate 101, and the extension direction of the radiation branch 12 and the parasitic branch 13 is parallel to the short side 101a of the grounding plate 101. The radiation branch 12 generates a first radiation current under the excitation of the first feed source 11, and couples to excite the grounding plate 101 to generate a third radiation current along the direction of the short side 101a. The parasitic branch 13 generates a second radiation current under the coupling excitation of the first feed source 11, and couples to excite the grounding plate 101 to generate a fourth radiation current along the direction of the short side 101a. The fourth radiation current is opposite to the direction of the third radiation current, and both are parallel to the short side 101a, that is, parallel to the extension direction of the radiation branch 12 and the parasitic branch 13. Therefore, the radiation beams perpendicular to the extension directions of the radiation branches 12 and the parasitic branches 13 can be further effectively offset, and the radiation pattern can present a more obvious depression in the two relative directions, and the directional radiation performance can be effectively achieved.

[0113] See also Fig.11 , is a schematic plan view of a reference electronic device 100'. The reference electronic device 100' comprises a reference antenna assembly 1', the reference antenna assembly 1' comprises a feed source 11' and a radiation branch 12', one end of the radiation branch 12' is grounded, and the other end is an open circuit end, the radiation branch 12' comprises a feeding point F1', the feed source 11' is connected to the radiation branch 12', and the radiation branch 12' supports the transmission and reception of electromagnetic wave signals in the first frequency band under the excitation of the feed source 11'.

[0114] The reference antenna assembly 1' of the reference electronic device 100' mainly realizes an omnidirectional radiation pattern. Since it only includes radiation branches 12', it cannot generate radiation currents in two opposite directions and cannot realize the directional radiation performance in the present application.

[0115] Among them, Fig.11 As mentioned above, the reference electronic device 100' further includes a ground plane 101'.

[0116] See also Fig.12 , is a schematic diagram of current distribution on the ground plane 101 of the electronic device 100 in some embodiments of the present application and the ground plane 101 ′ of the reference electronic device 100 ′.

[0117] in, Fig.12 Schematic diagrams (a) of current distribution on the ground plane 101 of the electronic device 100 in some embodiments of the present application and (b) of current distribution on the ground plane 101' of the reference electronic device 100' are shown. The electronic device 100 may be Fig. 9 The electronic device 100 of the structure shown. Fig.12 The current distribution schematic diagram (a) and the current distribution schematic diagram (b) are both schematic diagrams when the electronic device 100 is placed in landscape orientation.

[0118] from Fig.12 As can be seen from the current distribution diagram (a) in FIG. 1 , the current generated on the ground plane 101 of the electronic device 100 of the present application is mainly concentrated near the radiation branch 12 and the parasitic branch 13 of the antenna assembly 1, which can concentrate the energy and achieve better directional radiation performance. Fig.12 It can be seen from the current distribution diagram (b) that the current generated on the ground plate 101' of the reference electronic device 100' is distributed around the ground plate 101', and the energy is relatively dispersed, so the directional radiation performance is poor.

[0119] See also Fig.13 , is a schematic diagram of the return loss and system total efficiency curve of the electronic device 100 in some embodiments of the present application. Among them, Fig.13 Can be Fig. 9 The diagram is a schematic diagram of a return loss and system total efficiency curve obtained by simulation test when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0120] Specifically, Fig.13 Schematically shows a return loss curve S11 - 1 and a system total efficiency curve St1 obtained by simulation test when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0121] Among them, in a certain frequency band, the frequency corresponding to the lowest point of the same input return loss curve is the resonant frequency point. The lower the input return loss, the lower the loss at the resonant frequency and the higher the antenna efficiency. Correspondingly, the higher the total system efficiency, the higher the antenna efficiency at the resonant frequency.

[0122] like Fig.13As shown, at the resonant frequency of the first frequency band, the return loss of the antenna component 1 is approximately -27dB, and the total system efficiency of the antenna component 1 is approximately -2dB. The return loss is low, while the total system efficiency is high, and better antenna radiation performance can be achieved.

[0123] Wherein, in some embodiments, Fig.13 As shown, the first frequency band may be the B3 frequency band, and the resonant frequency is approximately around 1.86 GHz. Fig.13 This is just an example in which the first frequency band is the B3 frequency band. As mentioned above, the first frequency band may be any frequency band.

[0124] See also Fig.14 , is a three-dimensional schematic diagram of the directional diagram of the electronic device 100 in some embodiments of the present application. Among them, Fig.14 Can be Fig. 9 The illustrated three-dimensional schematic diagram is a directional diagram obtained by simulation testing when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0125] The darker the color in the directional map, the direction the directional map mainly points to. Fig.14 As shown, when the radiation branch 12 and the parasitic branch 13 are arranged on one of the side ends D12b and close to the top end D11a, the main direction R1 of the directional pattern is the direction pointing to one side of the bottom end D11b.

[0126] See also Fig.15 , is a plan view of a directional diagram of an electronic device 100 in some embodiments of the present application. Fig.15 Can be Fig. 9 The cross-sectional schematic diagram is taken from the three-dimensional schematic diagram of the directional pattern obtained by simulation test when the antenna assembly 1 of the electronic device 100 works in the first frequency band. That is, Fig.15 Can be Fig.14 A cross-sectional schematic diagram is taken from the stereoscopic schematic diagram of the directional diagram shown.

[0127] in, Fig.15 It is a cross-sectional directional diagram taken in a normal direction perpendicular to the display screen of the electronic device 100 .

[0128] The display screen of the electronic device 100 is 0°, the top D11a of the electronic device 100 is 90°, the back of the electronic device 100 is 270°, and the bottom D11b of the electronic device 100 is 270°. Fig.15It can be seen that the main direction R1 of the directional pattern is approximately 280 degrees, roughly pointing to the bottom end D11b of the electronic device 100 and slightly biased toward one side of the display screen of the electronic device.

[0129] Therefore, from Fig.14 and Fig.15 It can be seen that when the radiation branch 12 and the parasitic branch 13 are arranged on one of the side ends D12b and close to the top end D11a, the main direction R1 of the directional pattern is roughly pointing to one side of the bottom end D11b.

[0130] See also Fig.16 , is a schematic diagram of the directivity coefficient of the electronic device 100 in some embodiments of the present application. Fig.16 Can be Fig. 9 The diagram is a schematic diagram of directivity coefficients obtained through simulation testing when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0131] Among them, the directivity coefficient represents the directional radiation performance, that is, the degree of deviation of the directional pattern toward a certain direction. The higher the directivity coefficient, the better the directional radiation performance, and the more the directional pattern is inclined toward a certain direction, that is, the more it mainly points to that certain direction.

[0132] from Fig.16 It can be seen that at the resonant frequency of 1.86 GHz, the directivity coefficient of the electronic device 100 is the highest, reaching 7.35, and therefore has good directional radiation performance.

[0133] See also Fig.17 , is another plan view of the electronic device 100 in some embodiments of the present application. Fig.17 The schematic top view of the structure of the antenna assembly 1 is viewed from the back side of the electronic device 100, that is, the side away from the display screen.

[0134] in, Fig.17 The electronic device 100 shown includes Figure 5 The antenna assembly 1 shown in FIG. 1 is used as an example. Fig.17 As shown, the parasitic branch 13 includes a grounding end G1 and an open-circuit end O1 opposite to each other. The grounding end G1 of the parasitic branch 13 is adjacent to and spaced from the radiation branch 12. The grounding end G1 is used for grounding. The second end D2 of the radiation branch 12 is an open-circuit end, and the first feeding point F1 is set at the second end D2. Fig.17As shown, the antenna assembly 1 also includes a first matching unit 14 and a second matching unit 15. The first matching unit 14 is connected between the first feed source 11 and the first feeding point F1 of the radiating branch 12, and the second matching unit 15 is connected between the ground terminal G1 of the parasitic branch 13 and the ground. The equivalent electrical length of the radiating branch 12 in cooperation with the first matching unit 14 is λ / 4, and the equivalent electrical length of the parasitic branch 13 in cooperation with the second matching unit 15 is λ / 4.

[0135] Among them, Fig.17 As shown, the radiation branch 12 and the parasitic branch 13 can also be arranged on one of the side ends D12b of the electronic device 100 and close to the top end D11a, so that the directional pattern can be mainly directed to the direction of one side of the bottom end D11b. Obviously, similarly, the radiation branch 12 and the parasitic branch 13 can also be arranged at other positions of the electronic device 100.

[0136] See also Fig.18 , is another plan view of the electronic device 100 in some embodiments of the present application. Fig.18 The antenna assembly 1 included in the electronic device 100 is similar to Figure 5 The structure of the antenna assembly 1 shown is similar. Fig.18 and Fig.17 The difference between the electronic device 100 shown in FIG. 1 is that the electronic device 100 includes Figure 5 The antenna assembly 1 shown can be further miniaturized, and this can be achieved specifically by setting the position of the first feeding point F1 to a specific position and configuring the structures of the first matching unit 14 and the second matching unit 15 to be strong matching units.

[0137] Among them, Fig.18 As shown, the parasitic branch 13 also includes a grounding end G1 and an open-circuit end O1 opposite to each other. The grounding end G1 of the parasitic branch 13 is adjacent to and spaced from the radiation branch 12. The grounding end G1 is used for grounding. The second end D2 of the radiation branch 12 is an open-circuit end, and the first feeding point F1 is set at the second end D2. Fig.17 As shown, the antenna assembly 1 also includes a first matching unit 14 and a second matching unit 15. The first matching unit 14 is connected between the first feed source 11 and the first feeding point F1 of the radiating branch 12, and the second matching unit 15 is connected between the ground terminal G1 of the parasitic branch 13 and the ground. The equivalent electrical length of the radiating branch 12 in cooperation with the first matching unit 14 is λ / 4, and the equivalent electrical length of the parasitic branch 13 in cooperation with the second matching unit 15 is λ / 4.

[0138] Among them, Fig.18 As shown, the radiation branch 12 and the parasitic branch 13 can also be arranged on one of the side ends D12b of the electronic device 100 and close to the top end D11a, so that the radiation pattern can be mainly directed to the direction of the bottom end D11b.

[0139] Among them, Fig.18 As shown, the position of the first feeding point F1, that is, the second end D2 of the radiation branch 12 is close to the connection position of the adjacent short side 101a and the long side 101b of the ground plate 101, that is, the position of the first feeding point F1 is close to a vertex position of the ground plate 101. Fig.18 As shown, the position of the first feeding point F1 is close to the upper right corner of the ground plane 101 in the perspective shown in the figure. Therefore, the radiation branch 12 is fed at a vertex position close to the ground plane 101, which can effectively stimulate the current of the ground plane 101, which is beneficial to improving the directional radiation performance, and can participate in radiation through the ground plane 101. By configuring the first matching unit 14 as a strong matching unit, the size of the radiation branch 12 is allowed to be designed to be very small, for example, designed to be λ / 8 or smaller.

[0140] In some embodiments, the position of the first feeding point F1 close to a vertex position of the ground plane 101 may refer to that the distance between the projection of the vertex position of the ground plane 101 on the end of the electronic device 100 where the radiation branch 12 is located and the first feeding point F1 is less than a preset distance, such as less than 1 cm. Alternatively, in some embodiments, the position of the first feeding point F1 close to a vertex position of the ground plane 101 may also refer to that the distance between the intersection of the extension line of the diagonal line of the ground plane 101 passing through the vertex position and the end of the electronic device 100 and the first feeding point F1 is less than a preset distance, such as less than 1 cm.

[0141] Among them, since the grounding end G1 of the parasitic branch 13 is adjacent to the radiation branch 12 and is arranged at an interval, the grounding end G1 of the parasitic branch 13 is also relatively close to the top angle position of the ground plate 101, and can also effectively excite the current of the ground plate 101, which is beneficial to improving the directional radiation performance and can participate in radiation through the ground plate 101. By configuring the second matching unit 15 as a strong matching unit, the size of the parasitic branch 13 can be designed to be very small, for example, designed to be λ / 8 or smaller.

[0142] Among them, Fig.18 The size of the radiation branch 12 and the parasitic branch 13 is compared Fig.17 The radiation branches 12 and the parasitic branches 13 are shown to be smaller in size.

[0143] See also Fig.19 , is another schematic diagram of the first matching unit 14 in some embodiments of the present application. In order to further miniaturize the antenna assembly 1, the first matching unit 14 may be configured to have Fig.19 Strong matching unit of the structure shown.

[0144] like Fig.19 As shown, the first matching unit 14 includes at least one series inductor L1 connected in series between the first feeding point F1 and the first feed source 22 and a feed end inductor L2 connected between the first feed source 11 and the ground. Wherein, the equivalent electrical length of the radiation branch 12 under the cooperation of the first matching unit 14 can still correspond to the first frequency band, and support the transmission and reception of electromagnetic wave signals in the first frequency band.

[0145] Thus, effective matching can be achieved through the parallel structure of at least one series inductor L1 connected in series between the corresponding feeding point and the corresponding feeding source and the feeding end inductor L2 connected between the feeding source and the ground.

[0146] The matching parameter values ​​of the first matching unit M1 and the second matching unit M2 are specifically the parallel value of at least one series inductor L1 and a feed-end inductor L2.

[0147] In some embodiments, the at least one series inductor L1 may include one series inductor L1, or may include two series inductors L1 connected in series between the first feed point F1 and the first feed source 22, or may include three series inductors L1 connected in series between the first feed point F1 and the first feed source 22.

[0148] In order to further miniaturize the parasitic branch 13, when the second matching unit M2 is also a strong matching unit, the structure of the second matching unit M2 is similar to Fig.18 The structure of the first matching unit M1 shown is the same as that of Fig.18 The structure of the first matching unit M1 in the embodiment. For example, the second matching unit M2 may include at least one series inductor L1 connected in series between the ground terminal G1 and the ground and a feed-end inductor L2 connected between the ground terminal G1 and the ground. Wherein, the equivalent electrical length of the parasitic branch 13 under the cooperation of the second matching unit M2 can still correspond to the first frequency band, and support the transmission and reception of electromagnetic wave signals in the first frequency band.

[0149] Therefore, the antenna assembly 1 of the electronic device 100 in the present application is configured by configuring the first matching unit M1 and the second matching unit M2 as Fig.19The structure shown in FIG. 1 and configuring the first feeding point F1 to be located close to the top corner of the ground plane 101 can facilitate further miniaturization of the antenna assembly 1 .

[0150] See also Fig. 20 , is another return loss and system total efficiency curve diagram of the electronic device 100 in some embodiments of the present application. Among them, Fig. 20 Can be Fig.18 The diagram is a schematic diagram of a return loss and system total efficiency curve obtained by simulation test when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0151] Specifically, Fig. 20 Schematically shows a return loss curve S11 - 2 and a system total efficiency curve St2 obtained by simulation test when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0152] like Fig. 20 As shown, at the resonant frequency of the first frequency band, the return loss of the antenna component 1 is approximately -18dB, and the total system efficiency of the antenna component 1 is approximately -2.1dB. The return loss is low, while the total system efficiency is high, and better antenna radiation performance can be achieved.

[0153] Wherein, in some embodiments, Fig. 20 As shown, the first frequency band may be the B3 frequency band, and the resonant frequency is approximately around 1.86 GHz. Fig. 20 is 1.85GHz. Obviously, Fig.18 It is also just an example that the first frequency band is the B3 frequency band. As mentioned above, the first frequency band can be any frequency band.

[0154] from Fig. 20 It can be seen that in Fig.18 Under the structure of the electronic device 100 shown, the size of the radiation branch 12 and the parasitic branch 13 of the antenna assembly 1 of the electronic device 100 can be effectively reduced, but the return loss is still low, the overall system efficiency is still high, and the antenna radiation performance is still high.

[0155] See also Fig.21 , is another three-dimensional schematic diagram of the directional diagram of the electronic device 100 in some embodiments of the present application. Fig.21 Can be Fig.18 The illustrated three-dimensional schematic diagram is a directional diagram obtained by simulation testing when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0156] The darker the color in the directional map, the direction the directional map mainly points to. Fig.21As shown, when the radiation branch 12 and the parasitic branch 13 are arranged on one of the side ends D12b and close to the top end D11a, the main direction R1 of the directional pattern is the direction pointing to one side of the bottom end D11b.

[0157] See also Fig. 22 , is a plan view of a directional diagram of an electronic device 100 in some embodiments of the present application. Fig. 20 Can be Fig.17 The cross-sectional schematic diagram is taken from the three-dimensional schematic diagram of the directional pattern obtained by simulation test when the antenna assembly 1 of the electronic device 100 works in the first frequency band. That is, Fig. 22 Can be Fig.21 A cross-sectional schematic diagram is taken from the stereoscopic schematic diagram of the directional diagram shown.

[0158] in, Fig. 22 It is a cross-sectional directional diagram taken in a normal direction perpendicular to the display screen of the electronic device 100 .

[0159] The display screen of the electronic device 100 is 0°, the top D11a of the electronic device 100 is 90°, the back of the electronic device 100 is 270°, and the bottom D11b of the electronic device 100 is 270°. Fig.15 It can be seen that the main direction R1 of the directional pattern is approximately 280 degrees, roughly pointing to the bottom end D11b of the electronic device 100 and slightly biased toward one side of the display screen of the electronic device.

[0160] Therefore, from Fig.21 and Fig. 22 It can be seen that when the electronic device 100 includes Figure 5 The antenna assembly 1 shown in the figure includes a first matching unit M1 and a second matching unit M2. Fig.19 When the structure of the strong matching unit is shown, and the radiating branch 12 and the parasitic branch 13 are arranged on one of the side ends D12b and close to the top end D11a, that is, when the first feeding point F1 of the radiating branch 12 is close to the top angle position of the ground plate 101, the main direction R1 of the radiation pattern is roughly pointing to the direction of one side of the bottom end D11b, and good directional radiation performance can still be achieved.

[0161] See also Fig.23 , is another schematic diagram of the directivity coefficient of the electronic device 100 in some embodiments of the present application. Fig.23 Can be Fig.18 The diagram is a schematic diagram of directivity coefficients obtained through simulation testing when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0162] As mentioned above, the directivity coefficient characterizes the directional radiation performance, that is, the degree to which the directional pattern is biased toward a certain direction. The higher the directivity coefficient, the better the directional radiation performance, and the more the directional pattern is biased toward a certain direction, that is, the more it points mainly to that certain direction.

[0163] from Fig.23 It can be seen that at a resonant frequency of about 1.86 GHz, for example, 1.85 GHz in the figure, the directivity coefficient of the electronic device 100 is the highest, reaching 7.1, and the directivity coefficient is still very high. Therefore, the electronic device 100 includes Figure 5 The antenna assembly 1 shown in the figure includes a first matching unit M1 and a second matching unit M2. Fig.19 The structure of the strong matching unit is shown, and the radiating branch 12 and the parasitic branch 13 are arranged on one of the side ends D12b and close to the top end D11a, that is, when the first feeding point F1 of the radiating branch 12 is close to the top angle position of the ground plate 101, when the antenna assembly 1 operates in the first frequency band, it still has good directional radiation performance.

[0164] See also Fig.24 , is another schematic plan view of the electronic device 100 in some embodiments of the present application. Fig.24 The schematic top view of the structure of the antenna assembly 1 is viewed from the back side of the electronic device 100, that is, the side away from the display screen.

[0165] in, Fig.24 The electronic device 100 shown includes Figure 7 The antenna assembly 1 shown in FIG. 1 is used as an example. Fig.24 As shown, the parasitic branch 13 includes a grounded end G1 and an open-circuit end O1 opposite to each other. The grounded end G1 of the parasitic branch 13 is adjacent to and spaced from the radiation branch 12. The grounded end G1 is used for grounding. The first end D1 of the radiation branch 12 is an open-circuit end, and the second end D2 is grounded. The first feeding point F1 of the radiation branch 12 is located between the first end D1 and the second end D2 of the radiation branch 12. The antenna assembly 1 also includes a second feed source 16 and a third matching unit 17. The parasitic branch 13 includes a second feeding point F2. The second feed source 16 is connected to the second feeding point F2 through the third matching unit 17. The parasitic branch 13 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 16.

[0166] Among them, Fig.24As shown, the radiation branch 12 and the parasitic branch 13 can also be arranged on one of the side ends D12b of the electronic device 100 and close to the top end D11a, so that the directional pattern can be mainly directed to the direction of one side of the bottom end D11b. Obviously, similarly, the radiation branch 12 and the parasitic branch 13 can also be arranged at other positions of the electronic device 100.

[0167] See also Fig.25 , is a schematic diagram of a return loss and isolation curve of the electronic device 100 in some embodiments of the present application. Fig.25 Can be Fig.24 The diagram is a schematic diagram of return loss and isolation curves obtained by simulation testing when the antenna assembly 1 of the electronic device 100 works in the first frequency band and the second frequency band at the same time.

[0168] As mentioned above, the first frequency band may be the B3 frequency band, and the resonant frequency is approximately around 1.86 GHz. Fig. 22 As shown, in some embodiments, the second frequency band may be a B41 frequency band, and the resonant frequency is approximately located around 2.53 GHz.

[0169] in, Fig.25 The diagram illustrates a return loss curve S11 - 3 and an isolation curve Sg1 obtained by simulation testing when the antenna assembly 1 operates in the first frequency band and the second frequency band at the same time.

[0170] like Fig.25 As shown, at the resonant frequency of the first frequency band, the return loss of the antenna assembly 1 is approximately -18 dB, and at the resonant frequency of the second frequency band, the return loss of the antenna assembly 1 is approximately -25 dB. Therefore, it can be seen that in some embodiments, when the electronic device 100 includes Figure 7 The antenna assembly 1 shown can simultaneously support the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band, and the return loss of the antenna assembly 1 working in the first frequency band and the second frequency band is low.

[0171] Generally speaking, the smaller the amplitude corresponding to the isolation, the more effective the interference is, and the higher the isolation between the two radiators. Fig. 22 As shown, at the resonant frequency of the first frequency band, the isolation is approximately -21 dB, and at the resonant frequency of the second frequency band, the isolation is also approximately -21 dB. Therefore, it can be seen that the isolation of the two frequency bands is relatively low.

[0172] Therefore, from Fig.25 It can be seen that in Fig.24Under the structure of the electronic device 100 shown, the antenna assembly 1 of the electronic device 100 can support two frequency bands at the same time, and the return loss is still low, and the isolation between the two frequency bands is high, and it can still have high antenna radiation performance.

[0173] See also Fig.26 , is another schematic diagram of the total system efficiency of the electronic device 100 in some embodiments of the present application. Fig.26 Can be Fig.24 The illustrated diagram is a schematic diagram of a total system efficiency curve obtained through simulation testing when the antenna assembly 1 of the electronic device 100 operates in the first frequency band and the second frequency band simultaneously.

[0174] in, Fig.26 Schematically illustrates a system total efficiency curve St3 of the antenna assembly 1 of the electronic device 100 in the first frequency band, and a system total efficiency curve St4 of the antenna assembly 1 of the electronic device 100 in the second frequency band.

[0175] from Fig.26 It can be seen that the total system efficiency of the antenna component 1 at the resonant frequency of the first frequency band (approximately 1.85 GHz) is approximately -4 dB, and the total system efficiency of the antenna component 1 at the resonant frequency of the second frequency band (approximately 2.53 GHz) is approximately -1 dB, and the total system efficiency is relatively high.

[0176] See also Fig. 27 , is another three-dimensional schematic diagram of the directional diagram of the electronic device 100 in some embodiments of the present application. Fig. 27 Can be Fig.24 The antenna assembly 1 of the electronic device 100 shown is a three-dimensional schematic diagram of a directional pattern of an electromagnetic wave signal in the first frequency band obtained by a simulation test when the antenna assembly 1 of the electronic device 100 operates in at least the first frequency band.

[0177] The darker the color in the directional map, the direction the directional map mainly points to. Fig. 27 As shown, when the radiation branch 12 and the parasitic branch 13 are arranged on one of the side ends D12b and close to the top end D11a, the main direction R1 of the directional pattern is the direction pointing to one side of the bottom end D11b.

[0178] See also Fig.28 , is a plan view of a directional diagram of an electronic device 100 in some embodiments of the present application. Fig.28 Can be Fig.24 The cross-sectional schematic diagram is taken from the three-dimensional schematic diagram of the directional pattern obtained by simulation test when the antenna assembly 1 of the electronic device 100 works in the first frequency band. That is, Fig.28 Can be Fig. 27A cross-sectional schematic diagram is taken from the stereoscopic schematic diagram of the directional diagram shown.

[0179] in, Fig.28 It is a cross-sectional directional diagram taken in a normal direction perpendicular to the display screen of the electronic device 100 .

[0180] The display screen of the electronic device 100 is 0°, the top D11a of the electronic device 100 is 90°, the back of the electronic device 100 is 270°, and the bottom D11b of the electronic device 100 is 270°. Fig.15 It can be seen that the main direction R1 of the directional pattern is approximately 280 degrees, roughly pointing to the bottom end D11b of the electronic device 100 and slightly biased toward one side of the display screen of the electronic device.

[0181] Therefore, from Fig. 27 and Fig.28 It can be seen that when the electronic device 100 includes Figure 7 The antenna assembly 1 shown, and the radiation branch 12 and the parasitic branch 13 are arranged on one of the side ends D12b, and when close to the top end D11a, the main direction R1 of the radiation pattern is roughly pointing to the direction of one side of the bottom end D11b, and still can achieve good directional radiation performance.

[0182] See also Fig.29 , is another schematic diagram of the directivity coefficient of the electronic device 100 in some embodiments of the present application. Fig.29 Can be Fig.24 The diagram is a schematic diagram of directivity coefficients obtained through simulation testing when the antenna assembly 1 of the electronic device 100 operates in the first frequency band.

[0183] As mentioned above, the directivity coefficient characterizes the directional radiation performance, that is, the degree to which the directional pattern is biased toward a certain direction. The higher the directivity coefficient, the better the directional radiation performance, and the more the directional pattern is biased toward a certain direction, that is, the more it points mainly to that certain direction.

[0184] from Fig.29 It can be seen that at a resonant frequency of about 1.86 GHz, for example, 1.85 GHz in the figure, the directivity coefficient of the electronic device 100 is the highest, reaching 7.2, and the directivity coefficient is still very high. Therefore, the electronic device 100 includes Figure 7 The antenna assembly 1 shown still has good directional radiation performance when the antenna assembly 1 operates in the first frequency band.

[0185] Please return to Fig. 9 , Fig.18 as well as Fig.24 The attached drawings, such as Fig. 9 , Fig.18 as well as Fig.24 As shown, the electronic device 100 further includes a frame B1 , and the radiation branches 12 and the parasitic branches 13 are arranged on the frame B1 of the electronic device 100 and are spaced apart by gaps X1 .

[0186] In some embodiments, the frame B1 of the electronic device 100 is a metal frame, and the radiation branches 12 and the parasitic branches 13 are metal frame segments formed by opening the gap X1 in the metal frame of the electronic device 100 .

[0187] In other embodiments, the frame B1 of the electronic device 100 is a non-metal frame, the radiating branches 12 and the parasitic branches 13 are metal segments arranged in the frame of the electronic device 100, and the radiating branches 12 and the parasitic branches 13 are spaced apart by the gap X1.

[0188] That is, in other embodiments, the frame B1 of the electronic device 100 may also be a non-metal frame with low conductivity such as plastic, ceramic, etc. The radiation branch 12 and the parasitic branch 13 are metal segments disposed in the frame B1 of the electronic device 100 .

[0189] The radiation branches 12 and the parasitic branches 13 may be embedded in the frame of the electronic device 100 , or may be disposed on the inner side of the frame of the electronic device 100 .

[0190] In some embodiments, the radiating branches 12 and the parasitic branches 13 are straight bars, and the surfaces with the largest areas of the radiating branches 12 and the parasitic branches 13 are surfaces parallel to the frame surface of the frame B1, wherein the frame surface of the frame B1 is approximately perpendicular to the plane of the display screen of the electronic device 100.

[0191] like Fig. 9 As shown in the figures, the electronic device 100 further includes a mainboard 102 , wherein the aforementioned first feed source 11 , the first matching unit 14 , the second matching unit 15 , and the second feed source 16 etc. may be arranged on the mainboard 102 .

[0192] Wherein, in some embodiments, Fig. 9 As shown, when the second end D2 of the radiation branch 12 is grounded, the second end D2 of the radiation branch 12 and other adjacent branches Z1 can be isolated by grounding and can be directly connected without opening a gap. Fig.17As shown, when the second end D2 of the radiation branch 12 is an open end, there is a gap X1 between the second end D2 of the radiation branch 12 and other adjacent branches Z1, and the gap X1 is used for isolation, and the end of other branches Z1 adjacent to the second end D2 of the radiation branch 12 close to the radiation branch 12 is grounded, thereby increasing the isolation between the radiation branch 12 and other adjacent branches Z1. Fig. 9 As shown in the figure, one end of the other branch Z1 adjacent to the open end O1 of the parasitic branch 13 close to the parasitic branch 13 can also be grounded, so as to increase the isolation between the parasitic branch 13 and other adjacent branches Z1.

[0193] In some embodiments, the radiation branch 12, the parasitic branch 13, etc. in the antenna assembly 1 can also be set on an antenna bracket, and set in the electronic device 100 through the antenna bracket, for example, set on the mainboard 102 through the antenna bracket, and can be close to the border B1.

[0194] The radiation branch 12 and the parasitic branch 13 may be LDS (laser forming) antennas formed on the antenna bracket of the mainboard 102 by laser technology, that is, an antenna bracket is set on the mainboard 102, and then the LDS antenna is formed thereon. The LDS antenna refers to a metal antenna pattern directly plated on the antenna bracket by laser technology. Alternatively, the radiation branch 12 and the parasitic branch 13 may be FPC (flexible printed circuit) antennas formed by laser technology and set on the mainboard 102 or other positions. The FPC antenna refers to a metal antenna pattern formed on the FPC, and the FPC antenna may be fixed to the mainboard 102 by bonding, embedding, welding, etc.

[0195] The electronic device 100 may be any device including an antenna, such as a mobile phone, a tablet computer, a smart watch, a laptop computer, etc.

[0196] The antenna assembly and the electronic device 100 in the present application, by stimulating the radiation branch 12 to generate a first radiation current in the opposite direction to the second radiation current generated by the parasitic branch 13, will at least generate a radiation beam in a direction perpendicular to the first radiation current and a radiation beam in a direction perpendicular to the second radiation current. Since the directions of the two radiation currents are opposite, the two corresponding radiation beams will also be opposite, thereby weakening or even canceling the radiation beam in the direction perpendicular to the first radiation current and the second radiation current, and making the radiation beam in the radiation pattern roughly concentrated in a certain direction, that is, making the radiation direction of the electromagnetic wave signal mainly toward the direction parallel to the first radiation current and the second radiation current, thereby effectively realizing directional radiation performance and meeting the needs of specific scenarios.

[0197] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0198] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An antenna assembly, characterized in that: include: First feed source; A radiation branch, comprising a first feeding point, wherein the first feeding point is connected to the first feed source, and the radiation branch is used to generate a first radiation current under the excitation of the first feed source; A parasitic branch is adjacent to and spaced from the radiating branch, and is coupled with the radiating branch. The extension direction of the parasitic branch is the same as the extension direction of the radiating branch, and the parasitic branch and the radiating branch are spaced apart along the extension direction of the radiating branch and the parasitic branch. The first feed source is used to excite the parasitic branch through the radiating branch coupling so that the parasitic branch generates a second radiation current, wherein the radiating branch and the parasitic branch jointly support the transmission and reception of electromagnetic wave signals in a first frequency band, wherein the direction of the second radiation current is opposite to the direction of the first radiation current so that the electromagnetic wave signal is directionally radiated.

2. The antenna assembly according to claim 1, characterized in that: The parasitic branch includes a grounding end and an open circuit end opposite to each other. The grounding end of the parasitic branch is adjacent to and spaced from the radiation branch. The grounding end is used for grounding.

3. The antenna assembly according to claim 2, characterized in that: The radiation branch comprises a first end and a second end opposite to each other, the first end is an open end, and the ground end of the parasitic branch is adjacent to and spaced from the first end of the radiation branch.

4. The antenna assembly according to claim 3, characterized in that: The electrical length of the radiation branch and the electrical length of the parasitic branch are both λ / 4, wherein λ is the wavelength corresponding to the first frequency band.

5. The antenna assembly according to claim 4, characterized in that: The second end of the radiation branch is grounded, and the first feeding point of the radiation branch is located between the first end and the second end of the radiation branch.

6. The antenna assembly according to claim 4, characterized in that: The second end of the radiation branch is an open-circuit end, and the first feeding point is arranged at the second end.

7. The antenna assembly according to claim 5 or 6, characterized in that: The length of the radiation branch and the length of the parasitic branch are respectively equal to the electrical length of the radiation branch and the electrical length of the parasitic branch, and are both λ / 4.

8. The antenna assembly according to claim 5 or 6, characterized in that: The antenna assembly also includes a first matching unit and a second matching unit, the first matching unit is connected between the first feed source and the first feeding point of the radiating branch, the second matching unit is connected between the grounding end of the parasitic branch and the ground, the equivalent electrical length of the radiating branch with the cooperation of the first matching unit is λ / 4, and the equivalent electrical length of the parasitic branch with the cooperation of the second matching unit is λ / 4.

9. The antenna assembly according to claim 8, characterized in that: The length of the radiation branch and the length of the parasitic branch are both less than λ / 4.

10. The antenna assembly according to claim 3, characterized in that: The antenna assembly also includes a second feed source and a third matching unit. The parasitic branch includes a second feeding point. The second feed source is connected to the second feeding point through the third matching unit. The parasitic branch supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source.

11. The antenna assembly according to claim 1, characterized in that: The first frequency band is the MHB frequency band.

12. An electronic device, characterized in that: The electronic device comprises the antenna assembly as described in any one of claims 1-11.

13. The electronic device according to claim 12, characterized in that: The electronic device comprises two opposite short sides and two long sides, and the radiation branch and the parasitic branch are arranged at a position close to one of the short sides of the same long side of the electronic device.

14. The electronic device according to claim 12, characterized in that: The electronic device also includes a grounding plate, which includes two opposite short sides and two long sides. The radiation branch and the parasitic branch are arranged adjacent to one long side of the grounding plate, and the extension direction of the radiation branch and the parasitic branch is parallel to the long side of the grounding plate. The radiation branch generates a first radiation current under the excitation of the first feed source, and couples to excite the grounding plate to generate a third radiation current along the long side direction. The parasitic branch generates a second radiation current under the coupling excitation of the first feed source, and couples to excite the grounding plate to generate a fourth radiation current along the long side direction. The fourth radiation current is opposite to the direction of the third radiation current.

15. The electronic device according to claim 12, characterized in that: The electronic device also includes a grounding plate, which includes two opposite short sides and two long sides. The radiation branch and the parasitic branch are arranged adjacent to one short side of the grounding plate, and the extension direction of the radiation branch and the parasitic branch is parallel to the short side of the grounding plate. The radiation branch generates a first radiation current under the excitation of the first feed source, and couples to excite the grounding plate to generate a third radiation current along the short side direction. The parasitic branch generates a second radiation current under the coupling excitation of the first feed source, and couples to excite the grounding plate to generate a fourth radiation current along the short side direction. The fourth radiation current is opposite to the direction of the third radiation current.

16. The electronic device according to claim 14 or 15, characterized in that: The first feeding point of the radiation branch is located close to the connection position of the adjacent short side and long side of the ground plate.

17. The electronic device according to claim 16, characterized in that: The antenna assembly also includes a first matching unit and a second matching unit, the first matching unit is connected between the first feed source and the first feeding point of the radiating branch, and the second matching unit is connected between the grounding end of the parasitic branch and the ground. The first matching unit includes at least one series inductor connected in series between the first feeding point and the first feed source and a feed end inductor connected between the first feed source and the ground; the second matching unit includes at least one series inductor connected in series between the grounding end and the ground and a feed end inductor connected between the grounding end and the ground.

18. The electronic device according to claim 12, characterized in that: The electronic device further comprises a frame, and the radiation branches and the parasitic branches are arranged on the frame of the electronic device and are spaced apart by gaps.

19. The electronic device according to claim 18, characterized in that: The frame is a metal frame, the radiation branches and the parasitic branches are metal frame segments formed by gaps in the metal frame, or the frame is a non-metal frame, the radiation branches and the parasitic branches are metal segments arranged in the frame.

20. The electronic device according to claim 12, characterized in that: The radiation branch and the parasitic branch are arranged in the electronic device through an antenna bracket.

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