Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment. The antenna assembly comprises a first feed source and a first radiator. The first radiator comprises a body part and an extension part, the body part is in a long strip shape and comprises a first end and a second end which are opposite in the length direction, a third end and a fourth end which are opposite in the width direction and a first feeding point, the first end is an open circuit end, the second end is grounded, and the third end is an open circuit end. The extension part is connected with at least partial area of the third end of the body part, the first feeding point is located between the first end and the second end and used for being connected with the first feed source, and the first radiator generates resonance current distribution at least supporting transceiving of electromagnetic wave signals of a first frequency band under excitation of the first feed source; the extension part is used for dispersing resonance current distribution on the body part so as to reduce the SAR value of the side, away from the extension part, of the body part. According to the invention, the SAR value can be effectively prevented from exceeding the standard while the radiation performance of the antenna is ensured.

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 antennas, people's communication experience is getting better and better, but the number of antennas included in electronic devices is also increasing. Generally speaking, in addition to meeting the needs of communication performance, the antenna radiation energy must also meet the compliance of SAR (Specific Absorption Rate), that is, meet safety requirements. At present, when the radiation direction is toward the top, bottom, etc. of the electronic device, or toward the screen side, the SAR standards of these radiation directions will be higher. Therefore, when the radiation direction of some antennas is toward the top, bottom or screen side of the electronic device, it is more likely to cause excessive radiation and fail to meet safety requirements. Therefore, how to effectively ensure the radiation performance of the antenna and avoid exceeding the SAR value has become a problem that needs to be solved. 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, the antenna assembly comprising a first feed source and a first radiator. The first radiator comprises a main body and an extension portion, the main body is in an elongated shape, comprising a first end and a second end opposite to each other in the length direction, a third end and a fourth end opposite to each other in the width direction, and a first feeding point, wherein the first end is an open-circuit end, the second end is grounded, the extension portion is connected to at least a part of the third end of the main body, the first feeding point is located between the first end and the second end, and is used to connect to the first feed source, and the first radiator generates a resonant current distribution that supports the transmission and reception of electromagnetic wave signals in at least a first frequency band under the excitation of the first feed source; wherein the extension portion is used to disperse the resonant current distribution on the main body to reduce the SAR value of the main body on the side away from the extension portion.

[0005] In a second aspect, an electronic device is also provided, the electronic device comprising an antenna assembly. The antenna assembly comprises a first feed source and a first radiator. The first radiator comprises a main body and an extension portion, the main body is in a long strip shape, comprising a first end and a second end opposite to each other in the length direction, a third end and a fourth end opposite to each other in the width direction, and a first feeding point, wherein the first end is an open circuit end, the second end is grounded, the extension portion is connected to at least a part of the third end of the main body, the first feeding point is located between the first end and the second end, and is used to connect to the first feed source, and the first radiator generates a resonant current distribution that supports the transmission and reception of electromagnetic wave signals in at least the first frequency band under the excitation of the first feed source; wherein the extension portion is used to disperse the resonant current distribution on the main body to reduce the SAR value of the main body on the side away from the extension portion.

[0006] The antenna assembly and electronic device of the present application, the antenna assembly in the present application, by connecting the extension portion at the third end of the main body of the first radiator, can distribute part of the current on the extension portion, and can change the radiation direction of at least part of the electromagnetic wave signal to other desired directions, for example, making the radiation direction toward a direction with a lower SAR value standard, thereby effectively avoiding SAR value exceeding the standard. 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 This is a side view of the antenna assembly in some embodiments of the present application as viewed from the first end side of the first radiator.

[0010] Figure 3 Schematic diagram of current distribution of a first radiator of an antenna assembly in some embodiments of the present application.

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

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

[0013] Figure 6 is a schematic diagram of a reference antenna assembly.

[0014] Figure 7The present invention is a plan view schematically showing a more specific structure of an antenna assembly 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 This is a partial schematic diagram showing part of the structure of an electronic device in some embodiments of the present application, viewed from the back.

[0018] Fig.11 This is a partial schematic diagram showing a partial structure of the electronic device 100 in some embodiments of the present application when viewed from the top 1D.

[0019] Fig.12 Schematic diagram comparing the radiation efficiency and the total system efficiency of the antenna assembly in some embodiments of the present application and a reference antenna assembly.

[0020] Fig.13 It is a schematic diagram comparing the SAR values ​​of the antenna assembly in some embodiments of the present application and a reference antenna assembly when operating in the first frequency band.

[0021] Fig.14 This is a further structural block diagram of an electronic device in some embodiments of the present application. DETAILED DESCRIPTION

[0022] 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.

[0023] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "thickness", "length", "width", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than implying or indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "connection" in this application includes 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", "third", "fourth", etc. are not specific, but are used to distinguish objects with the same name. If there is a description in the specification, the objects with the same name referred to by the terms "first", "second", "third", "fourth", etc. may be the same objects.

[0024] 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 and a first radiator 12. The first radiator 12 includes a main body 121 and an extension 122, the main body 121 is in an elongated shape, including a first end D1 and a second end D2 opposite to each other in the length direction, a third end D3 and a fourth end D4 opposite to each other in the width direction, and a first feeding point F1, wherein the first end D1 is an open end, the second end D2 is grounded, the extension 122 is connected to at least a part of the third end D3 of the main body 121, the first feeding point F1 is located between the first end D1 and the second end D2, and is used to connect to the first feed source 11, and the first radiator 12 generates a resonant current distribution that supports the transmission and reception of electromagnetic wave signals in at least the first frequency band under the excitation of the first feed source 11; wherein the extension 122 is used to disperse the resonant current distribution on the main body 121 to reduce the SAR value of the main body 121 on the side away from the extension 122.

[0025] Among them, when the first radiator 12 only includes the main body 121, the first radiator 12 generates a current distributed on the main body 121 under the excitation of the first feed source 11, and the radiation direction is a specific direction. The antenna assembly 1 in the present application can make part of the current, that is, the aforementioned part of the resonant current distributed on the extension part 122 by connecting the extension part 122 at the third end D3 of the main body 121 of the first radiator 12, and can change the radiation direction of at least part of the electromagnetic wave signal to other desired directions, for example, making the radiation direction toward the direction with a lower SAR value standard, which can effectively avoid the SAR value from exceeding the standard.

[0026] Since the main body 121 is in the shape of an elongated strip, the length direction is the extending direction of the longest side of the main body 121 , and the width direction is a direction substantially perpendicular to the length direction.

[0027] In some embodiments, the first radiator 2 may be in the shape of a long straight strip or a curved long strip. Figure 1 The first radiator 2 is illustrated as a long straight bar.

[0028] The first feeding point F1 is located between the first end D1 and the second end D2, and is also located at any position between the third end D3 and the fourth end D4.

[0029] Please also read Figure 2 , is a side view of the antenna assembly 1 in some embodiments of the present application viewed from the first end D1 side of the first radiator 12. The first feeding point F1 is located between the first end D1 and the second end D2 of the main body 121 and located on the first surface S1 of the main body 121, the extension portion 122 is in a strip shape, one end of the extension portion 122 is connected to at least a portion of the third end D3 of the main body 121, and the extension portion 122 is inclined toward the first surface S1 of the main body 121 and has a preset angle with the main body 122, and the preset angle is greater than 0° and less than 180°.

[0030] That is, in some embodiments, Figure 2 As shown, the extension portion 122 is inclined toward the first surface S1 of the main body 121 , that is, inclined toward the side where the first feeding point F1 is located, and has a preset angle with the main body 122 .

[0031] Furthermore, the extension portion 122 may include a third surface S3 and a fourth surface S4 relative to each other, wherein the third surface S3 and the first surface S1 of the main body portion 122 face the same side, and the fourth surface S4 and the second surface S2 of the main body portion 122 face the same side, and the extension portion 122 is inclined toward the first surface S1 of the main body portion 121 and has a preset angle with the main body portion 122, which may specifically refer to the angle less than 180° between the third surface S3 of the extension portion 122 and the first surface S1 of the main body portion 122.

[0032] The side of the main body portion 121 facing away from the extending portion 122 may refer to the side toward which the second surface S2 of the main body portion 122 faces.

[0033] Please also read Figure 3 , is a schematic diagram of current distribution of the first radiator 12 of the antenna assembly 1 in some embodiments of the present application. Figure 2 As shown, the main body 121 also includes a second surface S2 opposite to the first surface S1. When the first radiator 12 does not include the extension portion 122, when the first feed source 11 excites the main body 12 to transmit and receive electromagnetic wave signals through the first feeding point F1 located on the first surface S2, the radiation direction of the electromagnetic wave signal is mainly the direction R1 from the first surface S1 to the second surface S2, that is, substantially perpendicular to the second surface S2 and toward the direction R1 away from the first surface S1.

[0034] like Figure 3 As shown, when the first radiator 12 includes the extension portion 122, part of the current will be distributed on the extension portion 122, so that at least part of the electromagnetic wave signal will be radiated in the direction R2 from the third surface S3 to the fourth surface S4 of the extension portion 122, thereby effectively reducing the radiation intensity of the electromagnetic wave signal in the radiation direction from the first surface S1 to the second surface S2, and effectively avoiding the SAR value in the radiation direction from exceeding the standard. Among them, the current in this application can refer to the aforementioned resonant current.

[0035] In some embodiments, Figure 2 As shown, the extension portion 122 is inclined toward the first surface S1 of the main body 121 and the preset angle between the extension portion 122 and the main body 122 may be 90°, that is, the extension portion 122 may be vertically connected to the main body 121, and the extension portion 122 is substantially located on one side of the first surface S1 of the main body 121. Thus, the radiation direction of at least part of the electromagnetic wave signal is the direction R2 from the third surface S3 to the fourth surface S4 of the extension portion 122, which can significantly deviate from the direction R1 from the first surface S1 to the second surface S2, and can point to the direction with lower SAR requirements, effectively reducing the risk of SAR value exceeding the standard.

[0036] For example, in some embodiments, the antenna assembly 1 can be applied to an electronic device, and the first radiator 12 can be arranged at the top of the electronic device, the first surface S1 and the second surface S2 of the main body 121 can be parallel to the end surface of the top of the electronic device, and the second surface S2 can be in the direction facing the top of the electronic device. The third end D3 is the end of the main body 121 close to the back of the electronic device, the extension 122 is substantially perpendicular to the main body 121 and substantially parallel to the back of the electronic device, and the fourth surface S4 of the extension 122 can be in the direction facing the back of the electronic device. Thus, when the first feed source 11 excites the first radiator 12 to transmit and receive electromagnetic wave signals through the first feeding point F1 located on the first surface S2, the radiation direction of the electromagnetic wave signal includes the direction R1 from the first surface S1 to the second surface S2, that is, the direction facing the top of the electronic device, and also includes the direction R2 from the third surface S3 of the extension 122 to the fourth surface S4, that is, the direction facing the back of the electronic device. Thus, the radiation energy in the direction toward the top of the electronic device can be effectively reduced, and the direction toward the back of the electronic device is usually far away from the user, so there is often no problem of SAR value exceeding the standard, or the SAR standard is relatively low, and usually does not exceed the requirements corresponding to the relatively low SAR standard. Therefore, it is possible to effectively avoid SAR value exceeding the standard. More specific content will be introduced later.

[0037] The direction from the first surface S1 to the second surface S2 of the main body 121 is the thickness direction of the main body 121, and the thickness direction is a direction perpendicular to the length direction and the width direction. In some embodiments, when the main body 121 is a long straight bar, the first surface S1 and the second surface S2 are both planes, and when the main body 121 is a curved straight bar, the first surface S1 and the second surface S2 are curved surfaces. That is, the main body 121 is a curved straight bar, which specifically refers to bending from the first surface S1 to the second surface S2, or bending from the second surface S2 to the first surface S1.

[0038] Wherein, in some embodiments, Figure 1 As shown, the extension portion 122 is connected to a region of the third end D3 of the main body portion 121 close to the first end D1 , and the extension portion 122 is spaced apart from the second end D2 , that is, there is a gap between the extension portion 122 and the second end D2 .

[0039] That is, in some embodiments, the extension portion 122 may be disposed close to the first end D1 of the main body portion 121 , and may be spaced apart from the second end D2 , without being grounded.

[0040] like Figure 1 As shown, in some embodiments, the end of the extension portion 122 close to the first end D1 may be flush with the first end D1. Obviously, in some embodiments, the end of the extension portion 122 close to the first end D1 may also have a certain interval with the first end D1, but the interval between the end of the extension portion 122 close to the first end D1 and the first end D1 is smaller than the interval between the end of the extension portion 122 close to the second end D2 and the second end D2, so that the extension portion 122 is still relatively close to the first end D1.

[0041] Obviously, in other embodiments, the extension portion 122 may also be connected to the area of ​​the third end D3 of the main body portion 121 close to the second end D2, that is, in other embodiments, the extension portion 122 may be arranged close to the second end D2 of the main body portion 121.

[0042] Among them, Figure 1 As shown, the main body 121 and the extension 122 may both be long straight strips, and the projections of the main body 121 and the extension 122 in the respective thickness directions are both rectangular. The side along the width direction where the first end D1 and the second end D2 of the main body 121 are located is the short side of the main body 121, and the side along the length direction where the first end D1 and the second end D2 of the main body 121 are located is the long side of the main body 121. The extension 122 is specifically connected to the third end D2 through the long side. In some embodiments, the length direction of the extension 122 is smaller than the length direction of the main body 121, so that the extension 122 is only connected to a partial area of ​​the third end D3 of the main body 121. Obviously, in some embodiments, the length direction of the extension 122 may be equal to the length direction of the main body 121, so that the extension 122 may be connected to all areas of the third end D3 of the main body 121.

[0043] See also Figure 4 , is another exemplary diagram of the antenna assembly 1 in some embodiments of the present application. Figure 4 As shown, in some embodiments, the extension portion 122 may include two extension portions 122 , both of which are connected to a partial area of ​​the third end D3 of the main body portion 121 , and the two extension portions 122 are spaced apart.

[0044] Obviously, the extension part 122 may also include three or more. That is, in some embodiments, the extension part 122 may include at least two. Therefore, the extension part 122 may also include at least two, and the at least two extension parts 122 are arranged at intervals, so that the extension part 122 can be avoided from being arranged at a position that needs to be isolated as needed, making the extension part 122 more flexible and being able to more effectively ensure the radiation performance while avoiding the SAR value exceeding the standard.

[0045] In some embodiments, when the extension portion 122 includes at least two, each extension portion 122 is inclined toward the first surface S1 of the main body portion 121 and has an angle with the main body portion 122, and the angles between different extension portions 122 and the main body portion 122 may be the same or different. For example, in some embodiments, the angles between different extension portions 122 and the main body portion 122 may be the same, all of which are 90°. For another example, the angles between different extension portions 122 and the main body portion 122 may be different, for example, the angle between one extension portion 122 and the main body portion 122 may be 70°, the angle between another extension portion 122 and the main body portion 122 may be 90°, and the angle between another extension portion 122 and the main body portion 122 may be 110°, and so on, so that the radiation direction can be more dispersed, which is more conducive to avoiding SAR value exceeding the standard.

[0046] See also Figure 5 , is another exemplary diagram of the antenna assembly 1 in some embodiments of the present application. Figure 5 As shown, in some embodiments, a notch K1 is formed at the fourth end D4 of the main body 121. That is, in some embodiments, a notch K1 is formed at the fourth end D4 of the main body 121 opposite to the third end D3 connected to the extension portion 122. Figure 5 It can be a schematic top view viewed from the second surface S2 side of the main body 121 .

[0047] Thus, by providing the notch K1 at the fourth end D4, more current can flow to the extension portion 122, so that more current is distributed on the extension portion 122, while less current is distributed on the main body portion 121. Thus, more electromagnetic wave signals will be radiated in the direction R2 from the third surface S3 of the extension portion 122 to the fourth surface S4, so that more energy of the electromagnetic wave signals will be concentrated in the radiation direction corresponding to the extension portion 122 being excited, and only less energy will be concentrated in the radiation direction corresponding to the main body portion 121 being excited, that is, the direction R2 from the first surface S1 of the main body portion 121 to the second surface S2. Thus, the radiation performance can be ensured, and the SAR value can be more effectively prevented from exceeding the standard.

[0048] In some embodiments, the projection of the notch K1 on the third end D3 of the main body 121 at least partially overlaps with the area connected to the extension portion 122. The area connected to the extension portion 122 is the area of ​​the third end D3 connected to the extension portion 122.

[0049] In some embodiments, the gap K1 may also completely extend between the first end D1 and the second end D2 , that is, the gap K1 may be a gap obtained by removing a certain length from all regions of the fourth end D4 .

[0050] In some embodiments, the size of the notch K1 along the width direction of the body portion 121 accounts for a ratio of less than 1 / 2 of the width of the body portion 121. That is, in some embodiments, the notch K1 may be a predetermined portion of the body portion 121 removed from the fourth end D4 of the body portion 121 toward the third end D3, and the size of the predetermined portion in the width direction of the body portion 121 accounts for a ratio of less than 1 / 2 of the width of the body portion 121.

[0051] Therefore, the dimension of the notch K1 along the width direction of the main body 121 accounts for less than 1 / 2 of the width of the main body 121, which avoids the main body 121 from being too small, ensures the antenna radiation performance, and enables the current to be more distributed in the extension portion 122.

[0052] In some embodiments, the size of the notch K1 along the width direction of the main body 121 accounts for 1 / 4 to 1 / 2 of the width of the main body 121. Therefore, the notch K1 is neither too large nor too small, the antenna radiation performance is better ensured, and the current is more distributed in the extension portion 122.

[0053] In some embodiments, the dimension of the notch K1 along the width direction of the body portion 121 accounts for 1 / 3 of the width of the body portion 121. Obviously, in some embodiments, the dimension of the notch K1 along the width direction of the body portion 121 may also account for 2 / 5 of the width of the body portion 121, and so on.

[0054] When the fourth end D4 of the main body 121 is provided with a notch K1, the extension portion 122 may be Figure 1 The one shown can also be Figure 4 Multiple shown.

[0055] The width of the main body 121 is the dimension of the main body 121 in the width direction.

[0056] In some embodiments, the length of the main body 121 is greater than the length of a reference radiator in a reference antenna assembly, and the reference radiator is also used to support at least the transmission and reception of electromagnetic wave signals in the first frequency band.

[0057] See also Figure 6 , is a schematic diagram of a reference antenna component 1'. The reference antenna component 1' may include a first feed source 11 and a reference radiator 12', wherein the reference radiator 12' only includes a main body 121, and the main body 121 is in the shape of an elongated strip, including a first end D1 and a second end D2 opposite to each other along the length direction, and a first feeding point F1, wherein the first end D1 is an open-circuit end, and the second end D2 is grounded, and the first feeding point F1 is located between the first end D1 and the second end D2, and is used to connect to the first feed source 11, and the reference radiator 12' supports at least the transmission and reception of electromagnetic wave signals in the first frequency band under the excitation of the first feed source 11. Wherein, Figure 6 It is a side schematic diagram of the reference antenna assembly 1 ′.

[0058] That is, the reference radiator 12' in a reference antenna assembly 1' may only include the main body 121, but not the extension portion 122 mentioned above in the present application. Figure 5 As shown, the reference radiator 12' in the reference antenna assembly 1' also does not have the notch K1 of the present application. That is, the reference radiator 12' of the reference antenna assembly 1' can be an existing common radiator structure for supporting the transmission and reception of electromagnetic wave signals in the first frequency band.

[0059] Therefore, in the present application, the length of the main body 121 is greater than the length of the reference radiator 12' in the reference antenna assembly 1', which allows the current to be more dispersed on the main body 121 to avoid excessive concentration of energy, thereby helping to reduce the antenna radiation energy and further avoid exceeding the SAR value.

[0060] The length of the main body 121 is the dimension of the main body 121 in the length direction, and the length of the reference radiator 12 ′ is also the dimension of the reference radiator 12 ′ in the length direction.

[0061] In some embodiments, when the length of the main body 121 of the antenna assembly 1 is greater than the length of the reference radiator 12' in the reference antenna assembly 1', the antenna assembly 1 may include only the extension 122 without the notch K1, or may include both the extension 122 and the notch K1. In some embodiments, when the length of the main body 121 of the antenna assembly 1 is greater than the length of the reference radiator 12' in the reference antenna assembly 1', the antenna assembly 1 may include neither the extension 122 nor the notch K1, that is, the length is the same as the reference radiator 12', but the length is longer than the length of the reference radiator 12'.

[0062] In some embodiments, the length of the main body 121 of the antenna assembly 1 may be 2 mm (millimeter) longer than the length of the reference radiator 12 ′ in the reference antenna assembly 1 ′.

[0063] Please return to Figure 1 , Figure 2 As shown in the figure, the antenna assembly 1 also includes a matching unit 13, which is connected between the first feed source 11 and the first feeding point F1, and is used to perform matching adjustment on the first radiator 12 so that the first radiator 12 at least supports the transmission and reception of electromagnetic wave signals in the first frequency band under the excitation of the first feed source 11.

[0064] Among them, when the first radiator 12 adds the extension portion 122, or further adds the notch K1, and / or further increases the length compared to the reference radiator 12', the equivalent electrical length of the first radiator 12 will change, and the matching adjustment is performed through the matching unit 13, so that the first radiator 12 can still meet the resonance requirements.

[0065] The matching unit 13 includes an inductor and / or a capacitor, or includes a series or parallel structure consisting of multiple inductors and / or multiple capacitors.

[0066] In some embodiments, the portion between the first end D1 of the main body 121 of the first radiator 12 and the first feeding point F1 is used to realize the radiation of the electromagnetic wave signal of the first frequency band. The matching unit 13 performs matching adjustment on the first radiator 12 and can be equivalent to the corresponding electrical length. Assuming that the equivalent electrical length of the matching unit 13 is L1, and the equivalent electrical length of the portion between the first end D1 of the main body 121 of the first radiator 12 and the first feeding point F1 is L2, then L1+L2=λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band, that is, the wavelength corresponding to the center frequency of the first frequency band.

[0067] Thus, even if the first radiator 12 adds the extension portion 122, or further adds the notch K1, and / or further increases the length compared to the reference radiator 12', which causes the partial equivalent electrical length between the first end D1 of the main body 121 of the first radiator 12 and the first feeding point F1 to change, the matching unit 13 can be used to make the sum of the equivalent electrical length of the matching unit 13 and the partial equivalent electrical length between the first end D1 of the main body 121 of the first radiator 12 and the first feeding point F1 to be λ1 / 4, so that the first radiator 12 can still resonate in the first frequency band and support the reception and transmission of electromagnetic wave signals in the first frequency band.

[0068] See also Figure 7 , is a plan view schematically showing a more specific structure of the antenna assembly 1 in some embodiments of the present application. Figure 7 As shown, the antenna assembly 1 further includes a second radiator 14, a second feed source 15 and a grounded metal member 16. The second radiator 14 includes a second feed point F2, the second feed point F2 is connected to the second feed source 15, and the second radiator 14 at least supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source F2. The grounded metal member 16 is located between the first radiator 12 and the second radiator 14, and is used to at least achieve isolation between the first radiator 12 and the second radiator 14.

[0069] That is, in some embodiments, the antenna assembly 1 may also include a second radiator 14 for supporting electromagnetic wave signals in a second frequency band, and a grounded metal member 16 is provided between the second radiator 14 and the first radiator 12 to achieve isolation between the second radiator 14 and the first radiator 12 to avoid interference.

[0070] Among them, Figure 7 As shown, the second radiator 14 includes a fifth end D5 and a sixth end D6 opposite to each other along the length direction, the fifth end D5 is an open end, and the sixth end D6 is grounded; the fifth end D5 is close to the grounding metal member 16 and is spaced apart from the grounding metal member 16, and the first end D1 of the main body 121 of the first radiator 12 is close to the grounding metal member 16 and is spaced apart from the grounding metal member 16.

[0071] That is, in some embodiments, the grounding metal member 16 is specifically disposed between the first end D1 of the main body 121 of the first radiator 12 which is an open end and the fifth end D5 of the second radiator 14 which is an open end.

[0072] Among them, Figure 7As shown, the grounding metal member 16 is also in a long strip shape, including a seventh end D7 and an eighth end D8 opposite to each other, and a grounding point G1 for grounding, and the grounding point G1 is located between the seventh end D7 and the eighth end D8. The seventh end D7 of the grounding metal member 16 is directly opposite to the first end D1 of the main body 121 of the first radiator 12 and is spaced apart from each other, and the eighth end D8 of the grounding metal member 16 is directly opposite to the fifth end D5 of the second radiator 12 and is spaced apart from each other.

[0073] The portion between the second feeding point F2 of the second radiator 14 and the fifth end D5 is used to radiate the electromagnetic wave signal of the second frequency band. In some embodiments, the length of the portion between the second feeding point F2 of the second radiator 14 and the fifth end D5 is substantially equal to the electrical length and may be equal to λ2 / 4, wherein λ2 is the wavelength corresponding to the second frequency band, that is, the wavelength corresponding to the center frequency of the second frequency band.

[0074] In some embodiments, another matching unit may be connected between the second feeding point F2 of the second radiator 14 and the second feed source for matching adjustment. In this case, the other matching unit may also be equivalent to a partial electrical length, and the electrical length of the portion between the second feeding point F2 of the second radiator 14 and the fifth end D5 may be less than λ2 / 4, and the sum of the electrical lengths equivalent to the other matching unit is λ2 / 4.

[0075] In some embodiments, the portion between the first end D1 of the main body 121 of the first radiator 12 which is an open end and the grounded second end D2 is used to realize the radiation of electromagnetic wave signals in the third frequency band. Similarly, the matching unit 13 performs matching adjustment on the first radiator 12 and can be equivalent to the corresponding electrical length. Assuming that the equivalent electrical length of the matching unit 13 is L1, and the equivalent electrical length of the portion between the first end D1 of the main body 121 of the first radiator 12 and the second end D2 is L3, then L1+L3=λ3 / 4, where λ3 is the wavelength corresponding to the third frequency band, that is, the wavelength corresponding to the center frequency of the third frequency band.

[0076] In some embodiments, the portion between the fifth end D5 and the sixth end D6 of the second radiator 14 is also used to realize the radiation of electromagnetic wave signals in the fourth frequency band. The length of the portion between the fifth end D5 and the sixth end D6 of the second radiator 14 is substantially equal to the electrical length and may be equal to λ4 / 4, where λ4 is the wavelength corresponding to the second frequency band, that is, the wavelength corresponding to the center frequency of the fourth frequency band. Obviously, when another matching unit is connected between the second feeding point F2 of the second radiator 14 and the second feed source. Since the matching unit can also be equivalent to a partial electrical length, the electrical length of the portion between the fifth end D5 and the sixth end D6 may also be less than λ4 / 4, and the sum of the electrical lengths equivalent to the other matching unit is λ4 / 4.

[0077] Therefore, through the above structure, each radiator can achieve at least two operating frequency bands, and can support multiple frequency bands through a smaller antenna size, which greatly meets the current communication needs.

[0078] In some embodiments, the first frequency band supported by the first radiator 12 may be the N78 frequency band, the second frequency band supported by the second radiator 14 may be the WIFI 5G frequency band, the third frequency band supported by the first radiator 12 may be the GPSL1 frequency band, and the fourth frequency band supported by the second radiator 14 may be the WIFI 2.4G frequency band.

[0079] Among them, since the energy of the N78 frequency band is more concentrated, the SAR value is higher, which often easily leads to the SAR value exceeding the standard. In this application, the above-mentioned structure can effectively avoid the SAR value of the N78 frequency band from exceeding the standard. Obviously, through the above-mentioned improvement, the SAR value of other frequency bands supported by the first radiator 12, such as the third frequency band, can also be effectively reduced.

[0080] In some embodiments, when the second radiator 14 supports the WIFI 5G frequency band, the grounded metal member 16 can also serve as a parasitic direct of the WIFI 5G frequency band to further broaden the bandwidth of the WIFI 5G frequency band.

[0081] In some embodiments, the first feed source 11 is used to output a first feed signal and a second feed signal, wherein the first feed signal is a feed signal corresponding to the first frequency band, and the second feed signal is a feed signal corresponding to the third frequency band. After the first feed signal and the second feed signal output by the first feed source 11 are fed into the main body 121 through the first feeding point F1, the portion between the first end D1 of the main body 121 of the first radiator 12 and the first feeding point F1 resonates in the first frequency band under the excitation of the first feed signal, and supports the transmission and reception of electromagnetic wave signals in the first frequency band; the portion between the first end D1 and the second end D2 of the main body 121 of the first radiator 12 resonates in the third frequency band under the excitation of the second feed signal, and supports the transmission and reception of electromagnetic wave signals in the third frequency band.

[0082] The second feed source 15 is used to output a third feed signal and a fourth feed signal, wherein the third feed signal is a feed signal corresponding to the second frequency band, and the fourth feed signal is a feed signal corresponding to the fourth frequency band. The third feed signal and the fourth feed signal output by the second feed source 15 are fed into the second radiator through the second feeding point F2. The portion between the second feeding point F2 and the fifth end D5 of the second radiator 14 resonates in the second frequency band under the excitation of the third feed signal, and supports the transmission and reception of electromagnetic wave signals in the second frequency band. The portion between the fifth end D5 and the sixth end D6 of the second radiator 14 resonates in the fourth frequency band under the excitation of the fourth feed signal, and supports the transmission and reception of electromagnetic wave signals in the fourth frequency band.

[0083] The first feed source 11 may be a feed signal source obtained by mixing the first feed signal and the second feed signal through a combiner (not shown) by a radio frequency front-end circuit (not shown in the figure). The second feed source 15 may also be a feed signal source obtained by mixing the third feed signal and the fourth feed signal through a combiner by a radio frequency front-end circuit.

[0084] Obviously, in other embodiments, the frequency bands supported by the first radiator 12 and the second radiator 14 may also be other frequency bands as needed, or may additionally support other frequency bands. For example, in addition to supporting the N78 frequency band and the GPS L1 frequency band, the first radiator 12 may also support the WIFI 5G frequency band, wherein the WIFI 5G may also be realized through the portion between the first end D1 of the main body 121 of the first radiator 12 and the first feeding point F1, and the matching unit 13 may be an adjustable matching unit, and the equivalent electrical length is adjusted as needed, so that the sum of the electrical length of the portion between the first end D1 of the main body 121 of the first radiator 12 and the first feeding point F1 and the equivalent electrical length of the matching unit 13 is 1 / 4 of the wavelength corresponding to the N78 frequency band, thereby achieving resonance in the N78 frequency band, or is 1 / 4 of the wavelength corresponding to the WIFI 5G frequency band, thereby achieving resonance in the WIFI 5G frequency band. In addition, in other embodiments, the frequency band supported by the second radiator 14 may be the WIFI 2.4G band and the MB (medium frequency band), and specifically, the electrical length of the portion between the second feeding point F2 and the fifth end D5 of the second radiator 14 may be approximately equal to 1 / 4 of the wavelength of the WIFI 2.4G band, so as to achieve resonance in the WIFI 5G band, and the electrical length of the portion between the fifth end D5 and the sixth end D5 of the second radiator 14 may be approximately equal to 1 / 4 of the wavelength of the MB band, so as to achieve resonance in the MB band.

[0085] The first feed source 11 and the second feed source 15 may be feed sources that output corresponding feed signals.

[0086] Therefore, the sizes of the first radiator 12 and the second radiator 14 can be designed as needed, and the matching parameters of the matching circuit, such as capacitance and / or inductance, can be further designed so that the first radiator 12 and the second radiator 14 can support corresponding frequency bands.

[0087] That is, the structure of the first radiator 12 of the antenna assembly 1 in any of the above embodiments of the present application can be applied to support the transmission and reception of electromagnetic wave signals in any frequency band, and can avoid the SAR value of the electromagnetic wave signals in any frequency band from exceeding the standard.

[0088] In some embodiments, the structure of the second radiator 14 may also be the same as that of the first radiator 12, that is, it may be the structure of the first radiator 12 in any of the embodiments, thereby effectively preventing the SAR value of the electromagnetic wave signal in the frequency band supported by the second radiator 14 from exceeding the standard. When the structure of the second radiator 14 is the same as that of the first radiator 12, the structure of the second radiator 14 may refer to the structure of the first radiator 12 in any of the embodiments, and will not be described in detail here.

[0089] Thus, through the antenna assembly 1 of the present application, by connecting the extension portion 122 at least at the third end D3 of the main body portion 121 of the first radiator 12, part of the current can be distributed on the extension portion 122, and the radiation direction of at least part of the electromagnetic wave signal can be changed to another desired direction, for example, the radiation direction is directed toward a direction with a lower SAR value standard, which can effectively avoid the SAR value from exceeding the standard. In addition, each of the first radiator 12 and the second radiator 14 included in the antenna assembly 1 of the present application can also support the transmission and reception of electromagnetic wave signals in at least two frequency bands, and can greatly realize multiple frequency bands through a smaller antenna size to meet communication needs.

[0090] See also Figure 8 , is a structural block diagram of an electronic device 100 in some embodiments of the present application. The electronic device 100 may include the antenna assembly 1 in any of the aforementioned embodiments. The electronic device 100 may be any electronic device with an antenna, such as a mobile phone or a tablet computer.

[0091] The electronic device 100 can effectively avoid exceeding the SAR value by configuring the aforementioned antenna assembly 1, and can greatly realize multiple frequency bands through a smaller antenna size to meet communication requirements.

[0092] See also Fig. 9 , is a schematic plan view of an electronic device 100 in some embodiments of the present application. Fig. 9 As shown, the electronic device 100 includes the antenna assembly 1. Fig. 9 FIG. 1 is a top view schematically showing the structure of the antenna assembly 1 as viewed from the back side of the electronic device 100. Figure 1-Figure 4 as well as Figure 7 The antenna assembly 1 shown in FIG. 1 is actually the antenna assembly 1 viewed from the back side of the electronic device 100 .

[0093] in, Fig. 9 The antenna assembly 1 shown in FIG. Figure 7 The antenna assembly 1 is used as an example. That is, Fig. 9The antenna assembly 1 shown in the figure includes a first radiator 12, a second radiator 13, a grounding metal member 16 and other structures.

[0094] Among them, Fig. 9 As shown, the electronic device 100 further includes a frame B1, and the first radiator 12 and the second radiator 13 are arranged on the frame B1 of the electronic device 100 and are spaced apart by a gap X1. That is, the radiators of the antenna assembly 1 including the first radiator 12 are arranged on the frame B1. When the grounding metal member 16 is included, the grounding metal member 16 is also arranged on the frame B1.

[0095] In some embodiments, the frame B1 of the electronic device 100 is a metal frame, and the first radiator 12 and the second radiator 13 are metal frame segments formed by opening the gap X1 in the metal frame of the electronic device 100. That is, in some embodiments, the radiator of the antenna assembly 1 including the first radiator 12 is a metal frame segment formed by opening the gap X1 in the metal frame of the electronic device 100. When the grounding metal member 16 is included, the grounding metal member 16 is also a metal frame segment formed by opening the gap X1 in the metal frame.

[0096] In some other embodiments, the frame B1 of the electronic device 100 is a non-metal frame, and the first radiator 12 and the second radiator 13 are metal segments disposed in the frame of the electronic device 100. That is, in some embodiments, the radiators of the antenna assembly 1 including the first radiator 12 are metal segments disposed in the frame of the electronic device 100. When the grounding metal member 16 is included, the grounding metal member 16 is also a metal segment disposed in the frame of the electronic device 100.

[0097] 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 first radiation branch 11, the parasitic branch 12 and the second radiation branch 21 are metal segments arranged in the frame B1 of the electronic device 100.

[0098] The first radiator 12 , the second radiator 13 , etc. 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 .

[0099] like Fig. 9 As shown, the electronic device 100 includes a top 1D, a bottom 2D, and two side edges 3D and 4D. Fig. 9As shown, the antenna assembly 1 can be substantially disposed at a position 1D of the top of the electronic device 100. For example, Fig. 9 As shown, the first antenna radiator 12 and the grounding metal member 16 can be arranged at the position of the frame B1 located at the top 1D. For example, as mentioned above, when the frame B1 is a metal frame, it can be a metal frame segment formed by opening a gap in the frame B1 located at the top 1D. The second radiator 14 can be arranged at a connection position between the top 1D of the electronic device 100 and one of the sides, that is, arranged at a top corner of the electronic device 100.

[0100] Obviously, in some embodiments, the antenna assembly 1 may also be disposed approximately at the bottom 1D of the electronic device 100 , or approximately at the side 3D or 4D of the electronic device 100 .

[0101] Among them, Fig. 9 As shown, the main body 121 of the first radiator 12 and the grounding metal member 16 may be in the shape of a long straight strip, and the second radiator 14 may be in the shape of a curved long strip.

[0102] Please also read Fig.10 and Fig.11 , Fig.10 This is a partial schematic diagram showing part of the structure of the electronic device 100 in some embodiments of the present application, viewed from the back. Fig.11 This is a partial schematic diagram showing a partial structure of the electronic device 100 in some embodiments of the present application when viewed from the top 1D.

[0103] In some embodiments, Fig.10 as well as Fig.11 As shown, the electronic device 100 includes a back cover 3 and a display screen 4. When the electronic device 100 includes the aforementioned antenna assembly 1, that is, when the aforementioned antenna assembly 1 is disposed in the electronic device 100, the third end D3 of the main body 121 of the first radiator 12 is an end close to the back cover 3, and the fourth end D4 of the main body 121 of the first radiator 12 is an end close to the display screen 4.

[0104] Thus, as mentioned above, when the first radiator 12 is substantially disposed at the top 1D of the electronic device, the first surface S1 and the second surface S2 of the main body 121 may be parallel to the end surface of the top 1D of the electronic device 100, and the second surface S2 may be oriented in the direction toward which the top 1D of the electronic device 100 is oriented. The third end D3 is the end of the main body 121 close to the back of the electronic device 100, that is, close to the back cover 3 of the electronic device 100, when the extension 122 is substantially perpendicular to the main body 121 and extends from the top 1D of the electronic device 100 to the bottom 2D. Thus, when the first feed source 11 excites the first radiator 12 to transmit and receive electromagnetic wave signals through the first feeding point F1, the radiation direction of the electromagnetic wave signal includes the direction R1 from the first surface S1 of the main body 121 of the first radiator 12 to the second surface S2, that is, the direction toward the top 1D of the electronic device 100, and also includes the direction R2 from the third surface S3 of the extension portion 122 to the fourth surface S4, that is, the direction toward the back of the electronic device 100, that is, the direction toward which the back cover 3 faces. Thus, the radiation energy in the direction toward the top 1D of the electronic device 100 can be effectively reduced, and the direction toward the back of the electronic device 100, that is, the direction toward which the back cover 3 faces, is usually far away from the user, so there is often no problem of SAR value exceeding the standard, or the SAR standard is relatively low, and usually does not exceed the requirements corresponding to the relatively low SAR standard. Therefore, the SAR value exceeding the standard can be effectively avoided.

[0105] The length direction of the main body 121 of the first radiator 12 is the extension direction of the frame B1 at the top 1D, that is, the length direction of the frame B1. The width direction of the main body 121 of the first radiator 12 can be the thickness direction of the electronic device 100, that is, the direction from the display screen 4 to the back cover 3 of the electronic device. The length direction of the second radiator 14 can also be the extension direction of the frame B1 at the corresponding part.

[0106] Among them, the directional terms such as "top" and "bottom" used in the embodiments of the present application to describe the electronic device 100 are mainly explained based on the orientation of the electronic device 100 when the user holds it in hand. The position toward the top side of the electronic device 100 is the "top", and the position toward the bottom side of the electronic device 100 is the "bottom". It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the orientation of the electronic device 100 in actual application scenarios. In some embodiments, the bottom end of the electronic device 100 is the end where the headphone jack and the USB port are provided, and the top of the electronic device 100 is the other end opposite to the end where the headphone jack and the USB port are provided, and may also refer to the end where a camera, a receiver, etc. are provided.

[0107] Please return to Fig. 9 ,like Fig. 9 As shown, the electronic device 100 further includes a mainboard 201, wherein the first feed source 11, the second feed source 15, etc. may be specifically arranged on the mainboard 201. The aforementioned “ground” may be the ground on the mainboard 201.

[0108] Among them, Fig. 9 As shown, the electronic device 100 further includes a front shell 202, which is used to support the display screen 4 and other structures, and the front shell 202 is used as the ground of the whole machine. The ground on the mainboard 201 is connected to the front shell 202 to provide a ground potential.

[0109] Among them, the ends of the first radiator 12 and the second radiator 14 that need to be grounded and the grounding point G1 of the grounding metal member 16 can be grounded by being electrically connected to the ground on the mainboard 201 or the front shell 202 through grounding connectors such as conductive wires, FPC, metal springs, solder, etc.

[0110] The first feeding point F1 and the second feeding point F2 can also be connected to the corresponding feed source through a conductive wire, FPC, metal spring, solder or other feeding connector. Figure 1 For example, the first feeding point F1 may be electrically connected to the first feeding source 11 through a feeding connector J1. Figure 7 For example, the second feeding point F2 may also be electrically connected to the second feed source 15 via a feeding connector J2.

[0111] Please refer to Fig.10 , wherein the extension portion 122 of the first radiator 12 extends away from the main body 121 to a position at a preset distance from the front shell 202, thereby preventing the front shell 202 from affecting the antenna radiation performance. In addition, the distance between the two opposite ends of the extension portion 122 of the first radiator 12 in the length direction of the main body 121 and the functional components such as the camera of the electronic device 100 is greater than a preset distance to avoid mutual interference.

[0112] That is, in some embodiments, the size of the extension portion 122 of the first radiator 12 may depend on the size of the clearance area provided by the electronic device 100 .

[0113] See also Fig.12 , is a schematic diagram comparing the radiation efficiency and system total efficiency of the antenna assembly 1 in some embodiments of the present application and a reference antenna assembly 1 '. Among them, Fig.12 Can be Figure 5The radiation efficiency and system total efficiency obtained by simulation test of the antenna assembly 1 shown in FIG. Figure 6 The radiation efficiency and the total system efficiency obtained by simulation test of the reference antenna assembly 1' are shown.

[0114] Among them, since the radiation energy of the N78 frequency band is relatively concentrated and the radiation direction is usually toward the direction of the top 1D of the electronic device 100, it is easy for the SAR value to exceed the standard, and the first frequency band is taken as the N78 frequency band as an example. Fig.12 Specifically, it can be Figure 5 The radiation efficiency and system total efficiency obtained by simulation test when the antenna assembly 1 shown in the figure works in the N78 frequency band and the aforementioned Figure 6 The radiation efficiency and total system efficiency of the reference antenna assembly 1' shown are obtained by simulation test when the antenna assembly 1' operates in the N78 frequency band.

[0115] in, Fig.12 It shows that Figure 5 The radiation efficiency curve Se1 and the system total efficiency curve St1 obtained by the simulation test of the antenna assembly 1 shown in FIG. Figure 6 The radiation efficiency curve Se2 and the system total efficiency St2 obtained by simulation test of the reference antenna assembly 1' are shown.

[0116] from Fig.12 It can be seen that at the three frequencies of 3.55 GHz, 3.6 GHz and 3.7 GHz in the N78 frequency band, the radiation efficiency of the antenna assembly 1 of the present application is substantially the same as the radiation efficiency of the reference antenna assembly 1'. In addition, at the three frequencies of 3.55 GHz, 3.6 GHz and 3.7 GHz in the N78 frequency band, the total system efficiency of the antenna assembly 1 of the present application (respectively Fig.12 4, 5, 6 in the figure) and the total system efficiency of the reference antenna assembly 1' (respectively Fig.12 The three points 1, 2, and 3 in the figure are also basically the same.

[0117] It can be seen that the antenna assembly 1 of the present application can maintain radiation efficiency and system total efficiency that are substantially the same as those of the existing reference antenna assembly 1 ′, that is, the antenna radiation performance is substantially the same.

[0118] from Fig.12 It can also be seen that, since the antenna assembly 1 of the present application adds the extension portion 122, although the clearance of the antenna may be reduced, the antenna aperture is also increased, thereby maintaining the antenna radiation performance that is basically the same as that of the existing reference antenna assembly 1'.

[0119] See also Fig.13, is a schematic diagram comparing the SAR values ​​of the antenna assembly 1 in some embodiments of the present application and a reference antenna assembly 1' when operating in the first frequency band. Similarly, the first frequency band is specifically the N78 frequency band. Similarly, Fig.13 The SAR value of the antenna assembly 1 when operating in the first frequency band can be Figure 5 The SAR value obtained by simulation test when the antenna assembly 1 shown works in the first frequency band is Fig.13 The SAR value of the reference antenna assembly 1' when operating in the first frequency band can be the aforementioned Figure 6 The SAR value shown is obtained by simulation test when the reference antenna assembly 1 ′ operates in the first frequency band.

[0120] like Fig.13 As shown, at the 3.55GHz frequency point of the N78 frequency band, the SAR value of the reference antenna assembly 1' is 5.45W / kg (power density unit), and the SAR value of the antenna assembly 1 of the present application is 4.9W / kg, and the SAR value decreases by about 0.46dB. At the 3.6GHz frequency point of the N78 frequency band, the SAR value of the reference antenna assembly 1' is 5.5W / kg, and the SAR value of the antenna assembly 1 of the present application is 5W / kg, and the SAR value decreases by about 0.5dB. At the 3.7GHz frequency point of the N78 frequency band, the SAR value of the reference antenna assembly 1' is 4.78W / kg, and the SAR value of the antenna assembly 1 of the present application is 4.17W / kg, and the SAR value decreases by about 0.59dB.

[0121] It can be seen that the SAR value of the antenna assembly 1 of the present application is reduced by almost 10% compared with the SAR value of the reference antenna assembly 1', which is a significant decrease. Fig.12 It can be seen from the simulation results that the antenna radiation performance of the antenna assembly 1 of the present application is substantially the same as the antenna radiation performance of the reference antenna assembly 1'. Therefore, the antenna assembly 1 of the present application can effectively reduce the SAR value while ensuring the antenna radiation performance substantially the same as the reference antenna assembly 1'.

[0122] See also Fig.14 , is a further structural block diagram of the electronic device 100 in some embodiments of the present application. Fig.14 As shown, the electronic device 100 includes the antenna assembly 1 and the like, and also includes a controller 5 .

[0123] The controller 5 is at least used to determine whether to perform power backoff according to a duty cycle of signal transmission when the electronic device 100 transmits and receives electromagnetic wave signals in the first frequency band.

[0124] The duty cycle of the signal transmission may be the ratio of the duration of signal transmission in a preset period to the duration of the period. The preset period may be a period established by a standardization organization, such as a communication standardization organization of the European Union or the United States.

[0125] In some embodiments, since the energy amplitude during signal transmission is substantially unchanged within a preset period, the total energy within the preset period depends on the proportion of signal transmission within the preset period. Generally speaking, the SAR value is obtained based on the total energy within the previous preset period and is positively correlated with the total energy within the previous preset period.

[0126] Therefore, in the present application, when the electronic device 100 transmits and receives electromagnetic wave signals in the first frequency band, the controller 5 can accurately determine whether the current SAR value exceeds the standard according to the duty cycle of signal transmission, thereby determining whether to perform power backoff.

[0127] In some embodiments, the controller 5 determines to perform power backoff when the duty cycle of the signal transmission is greater than a preset duty cycle, and determines not to perform power backoff when the duty cycle of the signal transmission is less than or equal to the preset duty cycle.

[0128] The total energy within the preset period depends on the proportion of signal transmission within the preset period, and is positively correlated with the proportion of signal transmission within the preset period, that is, the lower the proportion of signal transmission within the preset period, the lower the total energy within the preset period, and the higher the proportion of signal transmission within the preset period, the higher the total energy within the preset period. The preset duty cycle can be obtained through testing, for example, the duty cycle within the preset period can be adjusted in advance, and the SAR value can be obtained in real time, and then when the SAR value is just equal to the maximum allowable value, it is determined that the duty cycle of signal transmission within the current preset period is the preset duty cycle.

[0129] Therefore, when the duty cycle of the signal transmission is greater than the preset duty cycle, it means that the current SAR value exceeds the standard, and when the duty cycle of the signal transmission is less than or equal to the preset duty cycle, it means that the current SAR value does not exceed the standard.

[0130] Thus, when the duty cycle of the signal transmission is greater than the preset duty cycle, the controller 5 determines that power backoff needs to be performed and can control the performance of power backoff, and when the duty cycle of the signal transmission is less than or equal to the preset duty cycle, the controller determines that power backoff does not need to be performed and does not perform power backoff.

[0131] In some embodiments, the controller 5 can determine the duration of the signal transmission according to the power-on working duration of the power amplifier (not shown in the figure) within a preset period, and then divide the duration of the signal transmission by the preset period to determine the duty cycle of the current signal transmission. Generally speaking, when performing signal transmission, the power amplifier needs to be started, so the power-on working duration of the power amplifier is often equal to the duration of the signal transmission. Therefore, the duration of the signal transmission can be determined according to the power-on working duration of the power amplifier (not shown in the figure) within the preset period.

[0132] The signal transmission may be uplink and downlink, that is, may be a receiving signal and a transmitting signal. The preset duty cycle may be 32.8%.

[0133] In some embodiments, the controller 5 controls the execution of power backoff to control hierarchical backoff with a preset power backoff value. That is, in some embodiments, the controller 5 can control the backoff of the preset power backoff value, that is, subtract the preset power backoff value from the current power, and then obtain the current SAR value, and then when it is determined that the SAR value is still over the standard, control to continue to backoff the preset power backoff value until the SAR value does not exceed the standard.

[0134] In some embodiments, the controller 5 can also determine the target power backoff value corresponding to the current signal transmission duty cycle based on a preset correspondence between the duty cycle and the power backoff value, and control the backoff of the target power backoff value, that is, subtract the target power backoff value from the current power.

[0135] In some embodiments, the controller 5 controls the execution of power backoff to control the reduction of the output power of the first feed source 11 and the like.

[0136] Therefore, in the present application, by cooperating with the power back-off mechanism, it is possible to further avoid the SAR value from exceeding the standard.

[0137] The antenna assembly 1 and the electronic device 100 of the present application can distribute part of the current on the extension part 122 by connecting the extension part 122 at least at the third end D3 of the main body part 121 of the first radiator 12, and can change the radiation direction of at least part of the electromagnetic wave signal to other desired directions, for example, making the radiation direction toward the direction with a lower SAR value standard, and can effectively avoid the SAR value from exceeding the standard. In addition, each of the first radiator 12 and the second radiator 14 included in the antenna assembly 1 of the present application can also support the transmission and reception of electromagnetic wave signals in at least two frequency bands, and can greatly realize multiple frequency bands through a smaller antenna size to meet communication needs.

[0138] Among them, each embodiment of the present application has its own emphasis. In the absence of conflict, the contents of different embodiments can refer to each other.

[0139] 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 first radiator includes a main body and an extension portion, wherein the main body is in the shape of an elongated strip and includes a first end and a second end opposite to each other in the length direction, a third end and a fourth end opposite to each other in the width direction, and a first feeding point, wherein the first end is an open end, the second end is grounded, the extension portion is connected to at least a portion of the third end of the main body, the first feeding point is located between the first end and the second end, and is used to be connected to the first feed source, and the first radiator generates a resonant current distribution that supports the reception and transmission of electromagnetic wave signals in at least a first frequency band under the excitation of the first feed source; wherein the extension portion is used to disperse the resonant current distribution on the main body to reduce the SAR value of the main body on the side away from the extension portion.

2. The antenna assembly according to claim 1, characterized in that: The first feeding point is located between the first end and the second end and on the first surface of the main body, the extension portion is in a strip shape, one end of the extension portion is connected to at least a portion of the third end, and the extension portion is inclined toward the first surface of the main body and has a preset angle with the main body, and the preset angle is greater than 0° and less than 180°.

3. The antenna assembly according to claim 2, characterized in that: The preset angle is 90°.

4. The antenna assembly according to claim 2, characterized in that: The extension portion is connected to a region of the third end of the main body portion close to the first end, and the extension portion is spaced apart from the second end.

5. The antenna assembly according to claim 2, characterized in that: A notch is formed at the fourth end of the main body.

6. The antenna assembly according to claim 5, characterized in that: A projection of the notch on the third end of the main body at least partially overlaps with a region to which the extension portion is connected.

7. The antenna assembly according to claim 6, characterized in that: The ratio of the dimension of the notch along the width direction of the main body to the width of the main body is less than 1 / 2.

8. The antenna assembly according to claim 1, characterized in that: The length of the main body is greater than the length of a reference radiator in a reference antenna assembly, and the reference radiator is also used to support at least the transmission and reception of electromagnetic wave signals in the first frequency band.

9. The antenna assembly according to any one of claims 1 to 8, characterized in that: The antenna assembly also includes a matching unit, which is connected between the first feed source and the first feeding point, and is used to perform matching adjustment on the first radiator so that the first radiator at least supports the transmission and reception of electromagnetic wave signals in the first frequency band under the excitation of the first feed source.

10. The antenna assembly according to any one of claims 1 to 8, characterized in that: The antenna assembly also includes a second radiator, a second feed source and a grounded metal part. The second radiator includes a second feed point, the second feed point is connected to the second feed source, and the second radiator at least supports the transmission and reception of electromagnetic wave signals in a second frequency band under the excitation of the second feed source; the grounded metal part is located between the first radiator and the second radiator, and is used to at least achieve isolation between the first radiator and the second radiator.

11. The antenna assembly according to claim 10, characterized in that: The second radiator includes a fifth end and a sixth end opposite to each other along the length direction, the fifth end is an open end, and the sixth end is grounded; the fifth end is close to the grounded metal part and is spaced apart from the grounded metal part, and the first end of the main body of the first radiator is close to the grounded metal part and is spaced apart from the grounded metal part.

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 also includes a display screen and a back cover. When the antenna assembly is arranged in the electronic device, the third end of the main body of the first radiator is an end close to the back cover, and the fourth end of the main body of the first radiator is an end close to the display screen.

14. The electronic device according to claim 12, characterized in that: The electronic device includes a frame, and the radiators of the antenna assembly including the first radiator are arranged on the frame.

15. The electronic device according to claim 14, characterized in that: The frame of the electronic device is a metal frame, and the radiator of the antenna assembly including the first radiator is a metal frame segment formed by opening a gap in the metal frame of the electronic device.

16. The electronic device according to claim 14, characterized in that: The frame of the electronic device is a non-metal frame, and the radiators of the antenna assembly including the first radiator are metal segments arranged in the frame of the electronic device.

17. The electronic device according to claim 12, characterized in that: The electronic device further includes a controller, which is used at least to determine whether to perform power backoff according to a duty cycle of signal transmission when the electronic device transmits and receives electromagnetic wave signals in a first frequency band.

18. The electronic device according to claim 17, characterized in that: The controller determines to perform power backoff when the duty cycle of the signal transmission is greater than a preset duty cycle, and determines not to perform power backoff when the duty cycle of the signal transmission is less than or equal to the preset duty cycle.

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