Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly. The antenna assembly comprises a radiation branch knot, a first feed source, a second feed source and a matching unit, the radiation branch knot comprises a first feeding point and a second feeding point, the first feed source is connected with the first feeding point, and the radiation branch knot supports receiving and transmitting of electromagnetic wave signals of at least one frequency band under excitation of the first feed source. The first feed source is connected with the first feeding point, the second feed source is connected with the second feeding point, the radiation branch knot further supports receiving and transmitting of electromagnetic wave signals of at least one frequency band under excitation of the second feed source, and at least one frequency band supported by the radiation branch knot under excitation of the first feed source is at least partially different from at least one frequency band supported by the radiation branch knot under excitation of the second feed source. The matching unit is connected between the first feed source and the second feed source and between the first feed point and the second feed point, and is used for achieving impedance matching of corresponding frequency bands and achieving isolation of at least part of signals between the first feed source and the second feed source. The invention further provides electronic equipment. According to the invention, multiple frequency bands can be realized through a compact antenna structure.

Description

Technical Field

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

[0002] At present, with the popularization of 5G communication technology, people's communication experience is getting better and better. However, electronic devices need to support more and more frequency bands, and more and more antennas are needed. With the popularity of full screens and curved screens, the clearance left for antennas is getting less and less. Therefore, how to meet the current multi-band requirements within a limited space 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 radiating branch, a first feed source, a second feed source and a matching unit. The radiating branch comprises a first feed point and a second feed point, the first feed source is connected to the first feed point, and the radiating branch supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source. The second feed source is connected to the second feed point, and the radiating branch also supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source, wherein at least one frequency band supported by the radiating branch under the excitation of the first feed source is at least partially different from at least one frequency band supported by the radiating branch under the excitation of the second feed source. The matching unit is connected between the first feed source, the second feed source and the first feed point and the second feed point, and is used to achieve impedance matching of corresponding frequency bands, and to achieve at least partial signal isolation between the first feed source and the second feed source.

[0005] In a second aspect, an electronic device is also provided, the electronic device comprising an antenna assembly. The antenna assembly comprises a radiating branch, a first feed source, a second feed source and a matching unit. The radiating branch comprises a first feed point and a second feed point, the first feed source is connected to the first feed point, and the radiating branch supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source. The second feed source is connected to the second feed point, and the radiating branch also supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source, wherein at least one frequency band supported by the radiating branch under the excitation of the first feed source is at least partially different from at least one frequency band supported by the radiating branch under the excitation of the second feed source. The matching unit is connected between the first feed source, the second feed source and the first feed point and the second feed point, and is used to achieve impedance matching of the corresponding frequency bands, and to achieve at least partial signal isolation between the first feed source and the second feed source.

[0006] In the antenna assembly and electronic device of the present application, the radiation branch can be shared by two feed sources to support the corresponding frequency band, which can improve the compactness of the overall structure, effectively reduce the space occupied, and can achieve at least two frequency bands to meet the needs of multiple frequency bands. In addition, the matching unit effectively achieves the isolation of at least part of the signal between the first feed source and the second feed source, and can reduce or avoid mutual interference when the two feed sources share the radiation branch, effectively improving the antenna performance. 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 Another structural schematic diagram of the antenna assembly in some embodiments of the present application.

[0010] Figure 3 This is a structural block diagram of a matching unit in some embodiments of the present application.

[0011] Figure 4 A further structural diagram of the matching unit in some embodiments of the present application.

[0012] Figure 5 A schematic diagram of forming two conducting paths for an antenna assembly in some embodiments of the present application.

[0013] Figure 6 Another structural schematic diagram of the matching unit in some embodiments of the present application.

[0014] Figure 7 A further structural schematic diagram of the antenna assembly in some embodiments of the present application.

[0015] Figure 8 This is another further structural schematic diagram of the antenna assembly in some embodiments of the present application.

[0016] Fig. 9 This is yet another structural schematic diagram of the antenna assembly in some embodiments of the present application.

[0017] Fig.10 This is a structural block diagram of an electronic device in some embodiments of the present application.

[0018] Fig.11 It is a schematic plan view of an electronic device in some embodiments of the present application.

[0019] Fig.12 A schematic diagram of current distribution of an antenna assembly of an electronic device in some embodiments of the present application when operating in a first frequency band.

[0020] Fig.13 A schematic diagram of return loss and isolation of an antenna assembly of an electronic device in some embodiments of the present application when operating in a first frequency band and a second frequency band.

[0021] Fig.14 This is a schematic diagram of current distribution when the antenna assembly of the electronic device in some embodiments of the present application operates in the second frequency band.

[0022] Fig.15 Another schematic diagram of current distribution when the antenna assembly of the electronic device in some embodiments of the present application operates in the second frequency band.

[0023] Fig.16 This is a schematic diagram of the antenna efficiency of the antenna assembly of the electronic device in some embodiments of the present application when operating in the first frequency band and the second frequency band.

[0024] Fig.17 This is a schematic diagram of the antenna direction of the antenna assembly of the electronic device in some embodiments of the present application when operating in the second frequency band.

[0025] Fig.18 This is another schematic diagram of the antenna direction when the antenna assembly of the electronic device in some embodiments of the present application operates in the second frequency band.

[0026] Fig.19 A more specific structural block diagram of an electronic device in some embodiments of the present application. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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 radiating branch 11, a first feed source 12, a second feed source 13 and a matching unit 14. The radiating branch 11 includes a first feed point F1 and a second feed point F2; the first feed source 12 is connected to the first feed point F1, and the radiating branch 11 supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source 12. The second feed source 13 is connected to the second feed point F2, and the radiating branch 11 also supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source 13, wherein the at least one frequency band supported by the radiating branch 11 under the excitation of the first feed source 12 is at least partially different from the at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13. The matching unit 14 is connected between the first feed source 12, the second feed source 13 and the first feed point F1 and the second feed point F2, and is used to achieve impedance matching of corresponding frequency bands, and to achieve at least partial signal isolation between the first feed source 12 and the second feed source 13.

[0030] Thus, in the antenna assembly 1 of the present application, the radiating branch 11 supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source 12, the second feed source 13 is connected to the second feed point F2, and the radiating branch 11 also supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source 13. Since at least one frequency band supported by the radiating branch 11 under the excitation of the first feed source 12 is at least partially different from at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13, the radiating branch 11 can be shared by the two feed sources to support the corresponding frequency band, which can improve the compactness of the overall structure, effectively reduce the space occupied, and can realize at least two frequency bands to meet the requirements of multiple frequency bands. In addition, the matching unit 14 effectively realizes the isolation of at least part of the signal between the first feed source 12 and the second feed source 13, and can reduce or avoid the mutual interference when the two feed sources share the radiating branch 11, effectively improving the antenna performance.

[0031] Among them, since the matching unit 14 is connected between the first feed source 12, the second feed source 13 and the first feed point F1 and the second feed point F2, the connection between the first feed source 12 and the first feed point F1 may refer to the connection between the first feed source 12 and the first feed point F1 through the matching unit 14, and the connection between the second feed source 13 and the second feed point F2 may refer to the connection between the second feed source 13 and the second feed point F2 through the matching unit 14. Therefore, by connecting the matching unit 14 between the first feed source 12, the second feed source 13 and the first feed point F1 and the second feed point F2, impedance matching of the corresponding frequency band can be achieved, and at least partial signal isolation between the first feed source 12 and the second feed source 13 can be achieved.

[0032] Wherein, in the present application, the matching unit 14 realizes impedance matching of the first frequency band and the second frequency band, which means realizing better impedance matching of the corresponding frequency band, and does not mean the optimal impedance matching in a strict sense. Wherein, in the present application, the matching unit 14 realizes isolation of at least part of the signal between the first feed source 12 and the second feed source 13, including realizing isolation of electromagnetic wave signals of part of the frequency band between the first feed source 12 and the second feed source 13, or realizing isolation of part of the electromagnetic wave signals of any frequency band between the first feed source 12 and the second feed source 13, and so on.

[0033] The matching unit 14 realizes impedance matching of the corresponding frequency band, which may refer to realizing impedance matching of at least one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 and at least one frequency band supported by the radiation branch 11 under the excitation of the second feed source 13. That is, the corresponding frequency band may include at least one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 and at least one frequency band supported by the radiation branch 11 under the excitation of the second feed source 13.

[0034] Among them, in some embodiments, the first feed source 12 is used to output a feed signal of at least one frequency band, and the second feed source is used to output a feed signal of at least one frequency band. After the feed signal is radiated through the radiation branch 11, it is also the electromagnetic wave signal. Therefore, the output of the first feed source 12 and the second feed source can be regarded as an electromagnetic wave signal of at least one frequency band. Due to the shared radiation branch 11, the feed signal / electromagnetic wave signal output by one of the first feed source 12 and the second feed source 13 will be transmitted to the other of the first feed source 12 and the second feed source 13 through the radiation branch 11, causing interference. The isolation of at least part of the signal between the first feed source 12 and the second feed source 13 can refer to the isolation of at least part of the electromagnetic wave signal of at least part of the frequency band, which can improve the isolation degree.

[0035] In some embodiments, at least a portion of the radiation branch 11 supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source 12, and at least a portion of the radiation branch 11 supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source 13. The first feed source 12 and at least a portion of the correspondingly excited radiation branch 11 can be regarded as an antenna unit, and the second feed source 13 and at least a portion of the correspondingly excited radiation branch 11 can also be regarded as an antenna unit, wherein the isolation of at least a portion of the signal between the first feed source 12 and the second feed source 13 can also refer to the isolation between the two antenna units. Among them, since the radiation branch 11 is shared, the feeding signal / electromagnetic wave signal output by the first feed source 12 and the second feed source 13 will be transmitted to the other of the first feed source 12 and the second feed source 13 through the radiation branch 11, causing interference, that is, there is interference between the two antenna elements. Therefore, in the present application, the matching unit 14 is used to effectively achieve the isolation of at least part of the signal between the first feed source 12 and the second feed source 13, that is, the isolation of at least part of the signal between the two antenna units is effectively achieved.

[0036] In some embodiments, as described above, at least one frequency band supported by the radiating branch 11 under the excitation of the first feed source 12 is at least partially different from at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13. For example, at least one frequency band supported by the radiating branch 11 under the excitation of the first feed source 12 may be completely different from at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13, or, at least one frequency band supported by the radiating branch 11 under the excitation of the first feed source 12 is the same as at least part of the at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13.

[0037] In some embodiments, the at least one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 may include one or more, and the at least one frequency band supported by the radiation branch 11 under the excitation of the second feed source 13 may also include one or more. The term "plurality" in the present application includes two or more.

[0038] In some embodiments, the radiating branch 11 supports at least two frequency bands under the excitation of the first feed source 12, and at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13 is a frequency band among the at least two frequency bands supported by the radiating branch 11 under the excitation of the first feed source 12.

[0039] That is, in some embodiments, the radiating branch 11 supports the reception and transmission of electromagnetic wave signals in at least two frequency bands under the excitation of the first feed source, and the radiating branch 11 supports the reception and transmission of electromagnetic wave signals in at least one frequency band under the excitation of the second feed source 13, and at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13 is the same as part of the at least two frequency bands supported by the radiating branch 11 under the excitation of the first feed source 12.

[0040] Therefore, in some embodiments, the radiation branch 11 supports the same partial frequency band under the excitation of two feed sources, which is conducive to forming a MIMO (Multiple Input Multiple Output) antenna system in the same frequency band, and is conducive to improving the radiation performance in the same frequency band.

[0041] In some embodiments, the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the stimulation of the first feed source 12 , and the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the stimulation of the second feed source 13 .

[0042] That is, in some embodiments, the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13. Thus, the antenna assembly 1 can support at least two frequency bands at the same time, and can form a MIMO antenna system of the second frequency band, thereby improving the radiation performance of the second frequency band.

[0043] In terms of impedance matching, the matching unit 14 can be used to achieve impedance matching between the first frequency band and the second frequency band.

[0044] Among them, in the present application, the following mainly takes the example that the radiation branch 11 supports the transmission and reception of electromagnetic wave signals of the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiation branch 11 supports the transmission and reception of electromagnetic wave signals of the second frequency band under the excitation of the second feed source 13 as an example for explanation. Obviously, in some embodiments, as mentioned above, at least one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 may be completely different from at least one frequency band supported by the radiation branch 11 under the excitation of the second feed source 13, or at least one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 is the same as at least part of the frequency bands of at least one frequency band supported by the radiation branch 11 under the excitation of the second feed source 13, and the at least one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 may include one or more, and the at least one frequency band supported by the radiation branch 11 under the excitation of the second feed source 13 may also include one or more.

[0045] See also Figure 2 , is another structural schematic diagram of the antenna assembly 1 in some embodiments of the present application.

[0046] in, Figure 2 The antenna assembly 1 is compared Figure 1 The antenna assembly 1 shown in FIG. 1 illustrates more structures and / or reference numerals.

[0047] like Figure 2As shown, the radiation branch 11 includes a first open-circuit end 11a and a second open-circuit end 11b opposite to each other, the first feeding point F1 is located between the first open-circuit end 11a and the second feeding point F2, and the second feeding point F2 is located between the first feeding point F1 and the second open-circuit end 11b, and the radiation branch 11 includes a first branch portion Z1, a second branch portion Z2 and a third branch portion Z3, the first branch portion Z1 is a branch portion between the first open-circuit end 11a and the first feeding point F1, and the second branch portion Z3 is a branch portion between the first open-circuit end 11a and the first feeding point F1. Z2 is a branch part between the first feeding point F1 and the second open end 11b, and the third branch part Z3 is a branch part between the second feeding point F2 and the second open end 11b, wherein the first branch part Z1 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the first feed source 12, the second branch part Z2 supports the reception and transmission of electromagnetic wave signals in the first frequency band under the excitation of the first feed source 12, and the third branch part Z3 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13.

[0048] That is, in some embodiments, both ends of the radiation branch 11 are open ends, the first feeding point F1 is closer to the first open end 11a than the second feeding point F2, and the second feeding point F2 is closer to the second open end 11b than the first feeding point F1, and specifically, the first branch portion Z1 located between the first open end 11a and the first feeding point F1 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the first feed source 12, and is located between the first feeding point F1 and the second open end 11b. The second branch part Z2 supports the transmission and reception of electromagnetic wave signals in the first frequency band under the excitation of the first feed source 12, and the third branch part Z3 located between the second feeding point F2 and the second open end 11b supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13, so that the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13.

[0049] In some embodiments, the equivalent electrical length of the second branch part Z2 meets the requirement of resonance in the first frequency band, and the equivalent electrical lengths of the first branch part Z1 and the third branch part Z3 meet the requirement of resonance in the second frequency band, so that the first branch part Z1 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the first feed source 12, the second branch part Z2 supports the reception and transmission of electromagnetic wave signals in the first frequency band under the excitation of the first feed source 12, and the third branch part Z3 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13.

[0050] In some embodiments, the equivalent electrical length of the second branch portion Z2 is λ1 / 4, and the equivalent electrical lengths of the first branch portion Z1 and the third branch portion Z3 are λ2 / 4, wherein λ1 is the wavelength corresponding to the first frequency band, and λ2 is the wavelength corresponding to the second frequency band. The first branch portion Z1 operates in a quarter-wavelength resonance mode under the excitation of the first feed source 12 and supports the reception and transmission of electromagnetic wave signals in the second frequency band. The second branch portion Z2 operates in a quarter-wavelength resonance mode under the excitation of the first feed source 12 and supports the reception and transmission of electromagnetic wave signals in the first frequency band. The third branch portion Z3 operates in a quarter-wavelength resonance mode under the excitation of the second feed source 13 and supports the reception and transmission of electromagnetic wave signals in the second frequency band.

[0051] That is, in some embodiments, the above-mentioned branch parts of the radiation branch 11 work in a quarter-wavelength resonance mode and support the corresponding first frequency band or the second frequency band. Therefore, the equivalent electrical length of the second branch part Z2 is λ1 / 4, and the equivalent electrical length of the first branch part Z1 and the third branch part Z3 is λ2 / 4, which satisfies the resonance in the corresponding first frequency band or the second frequency band, and supports the reception and transmission of electromagnetic wave signals in the first frequency band or the second frequency band.

[0052] The equivalent electrical length of each branch portion such as the first branch portion Z1 of the radiation branch 11 may be the equivalent electrical length under the matching of the matching unit 14 .

[0053] In some embodiments, the matching unit 14 is at least used to achieve isolation between the first feed source 12 and the second feed source 13 of the electromagnetic wave signal of one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 or the second feed source 13 .

[0054] That is, in some embodiments, the matching unit 14 can be used to at least achieve isolation of electromagnetic wave signals in one frequency band between the first feed source 12 and the second feed source 13, that is, it can at least partially prevent the electromagnetic wave signals in one frequency band output by one of the first feed source 12 and the second feed source 13 from being transmitted to the other of the first feed source 12 and the second feed source 13, thereby improving the signal isolation between the first feed source 12 and the second feed source 13.

[0055] In some embodiments, as described above, the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13. The matching unit 14 is at least used to achieve signal isolation of the electromagnetic wave signals in the first frequency band between the first feed source 12 and the second feed source 13.

[0056] That is, in some embodiments, when the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13, the matching unit 14 can achieve signal isolation of the electromagnetic wave signals in the first frequency band between the first feed source 12 and the second feed source 13.

[0057] See also Figure 3 , which is a structural block diagram of the matching unit 14 in some embodiments of the present application.

[0058] In some embodiments, Figure 3 As shown, the matching unit 14 includes an impedance matching module 141 and an isolation module 142, the impedance matching module is used to achieve impedance matching between the first frequency band and the second frequency band, and the isolation module 142 is at least used to achieve signal isolation of the electromagnetic wave signal of the first frequency band between the first feed source 12 and the second feed source 13.

[0059] That is, in some embodiments, the matching unit 14 includes an impedance matching module 141 and an isolation module 142, the impedance matching module 141 is used to achieve impedance matching, and the isolation module 142 is used to achieve isolation of at least part of the signal between the first feed source 12 and the second feed source 13, and can achieve signal isolation of the electromagnetic wave signal of the first frequency band between the first feed source 12 and the second feed source 13.

[0060] Among them, in the present application, achieving signal isolation of electromagnetic wave signals in a certain frequency band between the first feed source 12 and the second feed source 13 may refer to blocking the conduction of at least part of the electromagnetic wave signals in the frequency band between the first feed source 12 and the second feed source 13, that is, the signal isolation in the present application may be isolation of at least part of the signal, and does not refer to complete isolation.

[0061] Among them, as mentioned above, in the following text of this application, the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiation branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13 as an example for explanation.

[0062] See also Figure 4 , which is a further structural diagram of the matching unit 14 in some embodiments of the present application.

[0063] In some embodiments, Figure 4 As shown, the impedance matching module 141 includes a first matching element M1 and a second matching element M2. The first matching element M1 is connected between the first feed source 12 and the first feeding point F1, and is used to achieve impedance matching between the first frequency band and the second frequency band when the radiating branch 11 supports the reception and transmission of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12. The second matching element M2 is connected between the second feed source 13 and the second feeding point F2, and is used to achieve impedance matching in the second frequency band when the radiating branch 11 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13.

[0064] That is, in some embodiments, the impedance matching module 141 includes a first matching element M1 and a second matching element M2. The first matching element M1 is used to implement impedance matching of the first frequency band and the second frequency band when the radiating branch 11 supports the reception and transmission of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12. The second matching element M2 is used to implement impedance matching of the second frequency band when the radiating branch 11 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13. Therefore, the radiation performance of the first frequency band and the second frequency band can be effectively improved.

[0065] Wherein, the first matching element M1 and the second matching element M2 may include a resistor, a capacitor and / or an inductor, and when the first matching element M1 and the second matching element M2 include at least two of the resistor, capacitor and inductor, at least two of the resistor, capacitor and inductor may be connected in series or in parallel. For example, the first matching element M1 may include a resistor and an inductor connected in series, and the second matching element M2 may include a capacitor and an inductor connected in series. For another example, the first matching element M1 may include a resistor and an inductor connected in series, and the second matching element M2 may include a structure in which a capacitor and an inductor are connected in parallel and in series with a resistor, and so on.

[0066] In some embodiments, the isolation module 142 is at least used to cooperate to form two conduction paths for the electromagnetic wave signal in the first frequency band, so that the phase difference of the electromagnetic wave signal in the first frequency band when it is transmitted from the first feed source 12 to the second feed source 13 through the two conduction paths is 180°.

[0067] That is, in some embodiments, the isolation module 142 participates in forming two conduction paths of the electromagnetic wave signal of the first frequency band, so that the phase difference of the electromagnetic wave signal of the first frequency band when it is conducted from the first feed source 12 to the second feed source 13 through the two conduction paths is 180°, wherein the electromagnetic wave signal of the first frequency band is conducted from the first feed source 12 through the two conduction paths to form two electromagnetic wave signals of the first frequency band, since the phase difference of the two electromagnetic wave signals of the first frequency band when they are conducted to the second feed source 13 through the two conduction paths is 180°, that is, the two are in anti-phase and can cancel each other, thereby achieving signal isolation of the electromagnetic wave signal of the first frequency band between the first feed source 12 and the second feed source 13.

[0068] Please also read Figure 4 and Figure 5 , Figure 5It is a schematic diagram of forming two conducting paths of the antenna assembly 1 in some embodiments of the present application. In some embodiments, the isolation module 142 includes a third matching element M3, a fourth matching element M4 and a fifth matching element M5, the third matching element M3 is connected between the first matching element M1 and the first feeding point F1, the fourth matching element M4 is connected between the second matching element M2 and the second feeding point F2, and the fifth matching element M5 is connected between the first connection point N1 and the second connection point N2, the first connection point N1 is the connection point between the third matching element M3 and the first matching element M1, and the second connection point N2 is the connection point between the fourth matching element M4 and the second matching element M2, wherein the two conduction paths include a first conduction path L11 and a second conduction path L12, the first conduction path L11 includes a path passing through the first matching element M1, the third matching element M3, a branch portion of the radiation branch 11 located between the first feeding point F1 and the second feeding point F2, the fourth matching element M4 and the second matching element M2, and the second conduction path L12 includes a path passing through the first matching element M1, the fifth matching element M5 and the second matching element M2.

[0069] Thus, the matching unit 14 can cooperate with part of the radiation branch 11 to form two conduction paths, that is, the isolation module 142 cooperates with the impedance matching module 141 and part of the radiation branch 11 to form two conduction paths for the electromagnetic wave signal of the first frequency band, and by setting the matching parameter values ​​of the matching elements in the two conduction paths, the phase difference of the electromagnetic wave signal of the first frequency band when it is transmitted from the first feed source 12 to the second feed source 13 through the two conduction paths can be 180°.

[0070] That is, in some embodiments, the matching parameter values ​​of the first matching element M1, the third matching element M3, the fourth matching element M4 and the second matching element M2 included on the first conduction path L11, and the matching parameter values ​​of the first matching element M1, the fifth matching element M5 and the second matching element M2 included on the second conduction path L12 can satisfy that the phase difference of the electromagnetic wave signal of the first frequency band when reaching the second feed source 13 after being respectively conducted through the first conduction path L11 and the second conduction path L12 is 180°.

[0071] Wherein, the third matching element M3, the fourth matching element M4 and the fifth matching element M5 may also include a resistor, a capacitor and / or an inductor, and when the third matching element M3, the fourth matching element M4 and the fifth matching element M5 include at least two of the resistor, capacitor and inductor, at least two of the resistor, capacitor and inductor may be connected in series or in parallel. For example, the third matching element M3 may include a resistor and an inductor connected in series, the fourth matching element M4 may include a capacitor and an inductor connected in series, and the fifth matching element M5 may include a resistor and a capacitor connected in series. For another example, the third matching element M3 may include a resistor and an inductor connected in series, the fourth matching element M4 may include a structure in which a capacitor and an inductor are connected in parallel and in series with a resistor, and the fifth matching element M5 may include a structure in which a resistor and a capacitor are connected in parallel, and so on.

[0072] The matching parameter values ​​of the first matching element M1, the second matching element M2, the third matching element M3, the fourth matching element M4 and the fifth matching element M5 may be impedance values ​​such as capacitance values, resistance values ​​or inductance values ​​that are finally presented. For example, when the first matching element M1 includes a resistor and an inductor connected in series, the whole may finally present an inductance value. For another example, when the first matching element M1 includes a capacitor and an inductor connected in series, it may finally present capacitance or inductance according to the values ​​of the capacitor and the inductor, that is, the first matching element M1 may finally present a capacitance value or an inductance value as a whole.

[0073] Wherein, in some embodiments, Figure 4 As shown, the impedance matching module 141 and the isolation module 142 in the matching unit 14 form a matching network structure that is roughly similar to an “H” shape.

[0074] The following is based on Figure 4 The structure of the matching unit 14 shown illustrates the relationship between the matching parameter values ​​of the first matching element M1 , the second matching element M2 , the third matching element M3 , the fourth matching element M4 , and the fifth matching element M5 .

[0075] Wherein, the original dual-port S parameter matrix S of the first feed source 12 and the second feed source 13 is assumed to be:

[0076]

[0077] The original dual-port S parameter matrix of the first feed source 12 and the second feed source 13 refers to the S parameter matrix of the ports of the first feed source 12 and the second feed source 13 connected to the first feeding point F1 and the second feeding point F2 respectively when the matching unit 14 is not included. 11It refers to the return loss coefficient / reflection coefficient of the port of the first feed source 12 when the port of the second feed source 13 is matched, S 12 It refers to the reverse transmission coefficient from the port of the second feed source 13 to the port of the first feed source 12 when the port of the first feed source 12 is matched, S 21 It refers to the forward transmission coefficient from the port of the first feed source 12 to the port of the second feed source 13 when the port of the second feed source 13 is matched, S 22 It refers to the return loss coefficient / reflection coefficient of the port of the second feed source 13 when the port of the first feed source 12 is matched.

[0078] The ports of the first feed source 12 and the second feed source 13 are also output ports of the first feed source 12 and the second feed source 13 for outputting corresponding feed signals.

[0079] Among them, the aforementioned isolation module 142 is at least used to cooperate in forming two conduction paths for electromagnetic wave signals in the first frequency band, so that the phase difference of the electromagnetic wave signals in the first frequency band when being transmitted from the first feed source 12 to the second feed source 13 through the two conduction paths is 180°, which may mean that the isolation module 142 is at least used to cooperate in forming two conduction paths for electromagnetic wave signals in the first frequency band, so that the phase difference of the electromagnetic wave signals in the first frequency band when being transmitted from the first feed source 12 to the port, i.e., the output port, of the second feed source 13 is 180°.

[0080] Furthermore, the S parameter matrix Sz of each matching element in the first matching element M1, the second matching element M2, the third matching element M3, the fourth matching element M4 and the fifth matching element M5 is k Can be:

[0081]

[0082] Among them, the above Z k It refers to the matching parameter value of any one of the first matching element M1, the second matching element M2, the third matching element M3, the fourth matching element M4 and the fifth matching element M5, that is, the impedance value.

[0083] Therefore, after adding the first matching element M1 and the second matching element M2, the S parameter matrix S becomes the S parameter matrix S N1 :

[0084]

[0085] Herein, Z1 may refer to the matching parameter value of the first matching element M1, that is, the impedance value, and Z2 refers to the matching parameter value of the second matching element M2, that is, the impedance value.

[0086] Among them, the above S parameter matrix S N1 The corresponding admittance matrix is ​​Y N1 , and the admittance matrix corresponding to the fifth matching element M5 is Y Z5 , and the details are as follows:

[0087]

[0088] Wherein, the above Z0 is the characteristic impedance of the system, which is usually 50 ohms. Therefore, after adding the fifth matching element M5, that is, after adding the fifth matching element M5 in addition to the first matching element M1 and the second matching element M2, the S matrix becomes S com :

[0089] S com =(I+Z0Y com ) -1 (I-Z0Y com )

[0090] in,

[0091] After further adding the third matching element M3 and the fourth matching element M4, the S matrix S of the antenna assembly 1 after adding the matching unit 14 can be finally obtained. N21 for:

[0092]

[0093] Among them, the above S matrix S N21 After simplification, the coupling coefficient between the first feed source 12 and the second feed source 13 can be obtained. If it is set to 0, the parameter equation can be obtained:

[0094] 2500S 11 +2500S 22 +50Z1+50Z2+2500S 11 S 22 -50S 11 Z1+50S 11 Z2+100S 12 Z5

[0095] +50S 22 Z1-50S 22 Z2+Z1Z2+50S 12 2 Z1+50S 12 2Z2-2500S 12 2 -S 12 2 Z1Z2

[0096] -50S 11 S 22 Z1-50S 11 S 22 Z2-S 11 Z1Z2-S 22 Z1Z2+S 11 S 22 Z1+2500=0

[0097] Among them, the coupling coefficient between the first feed source 12 and the second feed source 13 is 0, which means that basically no coupling will occur between the two, that is, no interference will occur. That is, as mentioned above, at this time, the phase difference of the electromagnetic wave signal in the first frequency band when it is transmitted from the first feed source 12 to the second feed source 13 through the two conduction paths is 180°, and they cancel each other out.

[0098] Therefore, the matching parameter values ​​of the first matching element M1, the second matching element M2, the third matching element M3, the fourth matching element M4 and the fifth matching element M5 can be set as needed, as long as the above parameter equation is satisfied, that is, as long as the coupling coefficient of the first feed source 12 and the second feed source 13 is 0.

[0099] See also Figure 6 , is another structural diagram of the matching unit 14 in some embodiments of the present application.

[0100] In some embodiments, Figure 6 As shown, the matching unit 14 includes the impedance matching module 141 and the isolation module 142, wherein Figure 6 In the illustrated embodiment, the isolation module 142 includes a filter circuit 142a, and the filter circuit 142a is used to filter out the electromagnetic wave signal in the first frequency band to achieve signal isolation of the electromagnetic wave signal in the first frequency band between the first feed source and the second feed source.

[0101] That is, in some embodiments, the isolation module 142 may not be Figure 4 The structure shown in , that is, the third matching element M3, the fourth matching element M4 and the fifth matching element M5 are not included, and the matching unit 14 may not be in an "H" shape as a whole, but may include a filtering circuit 142a to filter out the electromagnetic wave signal of the first frequency band, thereby achieving signal isolation of the electromagnetic wave signal of the first frequency band between the first feed source and the second feed source.

[0102] The filter circuit 142a may be a band-stop filter circuit for preventing electromagnetic wave signals in the first frequency band from passing through, while allowing electromagnetic wave signals in other frequency bands outside the first frequency band to pass through, thereby not affecting the normal operation of the second frequency band.

[0103] The filter circuit 142a may include a resistor, a capacitor and / or an inductor. For example, the filter circuit 142a may include a resistor, a capacitor and an inductor, and may be an RLC band-stop filter circuit composed of a resistor, a capacitor and an inductor.

[0104] Among them, Figure 6 The impedance matching module 141 may also include the first matching element M1 and the second matching element M2, wherein the filter circuit 142a may be located between the second matching element M2 and the second feeding point F2, and is used to filter out the electromagnetic wave signal in the first frequency band.

[0105] In some embodiments, the second matching element M2 can also simultaneously realize impedance matching for the second frequency band when the radiating branch 11 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13, and can also act as the filtering circuit 142a to filter out the electromagnetic wave signals in the first frequency band.

[0106] That is, in some embodiments, the isolation module 142 can share the second matching element M2 in the impedance matching module 141, and the second matching element M2 can be used for impedance matching and filtering out the electromagnetic wave signal in the first frequency band at the same time. At this time, the filtering circuit 142a can also be the second matching element M2, which can reduce components and save costs.

[0107] Obviously, in some embodiments, the filter circuit 142a included in the isolation module 142 may also be independent of the elements in the impedance matching module 141, such as the second matching element M2, that is, the second matching element M2 may only be used for impedance matching in the second frequency band, and the filter circuit 142a is used to filter out the electromagnetic wave signal in the first frequency band. Thus, it is convenient to design according to their respective functions, which is more conducive to realizing the impedance matching and filtering functions.

[0108] Please return to Figure 2 ,like Figure 2 As shown, the radiation branch 11 includes the second branch portion Z2 located between the first feeding point F1 and the second open end 11b. Figure 2 As shown, the radiation branch 11 further includes a fourth branch portion Z4, and the fourth branch portion Z4 is a branch portion between the first open-circuit end 11a of the radiation branch 11 and the second feeding point F2.

[0109] In some embodiments, the equivalent electrical length of the second branch portion Z2 meets the requirement of blocking the electromagnetic wave signal of the second frequency band generated by the first feed source 12, and the equivalent electrical length of the fourth branch portion Z4 meets the requirement of blocking the electromagnetic wave signal of the second frequency band generated by the second feed source.

[0110] That is, in some embodiments, the antenna assembly 1 can achieve signal isolation of the electromagnetic wave signal in the second frequency band between the first feed source and the second feed source by means of self-decoupling.

[0111] In some embodiments, when the isolation module 142 includes the fifth matching element M5, the fifth matching element M5 can also realize a bandpass filtering function, that is, it can only allow the electromagnetic wave signal of the first frequency band to pass through, and prevent the electromagnetic wave signal of the second frequency band from passing through. At this time, the electromagnetic wave signal of the second frequency band can only be transmitted to the radiation branch 11 and then transmitted through the radiation branch 11. When the isolation module 142 includes the aforementioned filtering circuit 142a but does not include the fifth matching element M5, the electromagnetic wave signal of the second frequency band can also only be transmitted to the radiation branch 11 and then transmitted through the radiation branch 11.

[0112] When the radiation branch 11 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the stimulation of the first feed source 12, the branch parts of the radiation branch 11 located on both sides of the first feed point F1 will be stimulated to generate corresponding currents in the second frequency band, that is, the first branch part Z1 and the second branch part Z2 will be stimulated to generate corresponding currents in the second frequency band. The currents of the radiation branch 11 on the first branch part Z1 and the second branch part Z2 can be decomposed into common-mode currents and differential-mode currents in the second frequency band, and the common-mode currents and differential-mode currents in the second frequency band on the first branch part Z1 are in phase, and by setting the electrical length of the second branch part Z2, the currents on the second branch part Z2 on the other side can be in anti-phase. Therefore, as mentioned above, the first branch part Z1 can support the reception and transmission of electromagnetic wave signals in the second frequency band under the stimulation of the first feed source 12. Since the common mode current and the differential mode current in the second frequency band are in anti-phase, they can cancel each other out and weaken, thereby blocking the electromagnetic wave signal in the second frequency band generated by the first feed source 12. When the equivalent electrical length of the second branch section Z2 satisfies the condition that the amplitudes of the anti-phase common mode current and the differential mode current in the second frequency band on the second branch section Z2 are equal, the common mode current and the differential mode current in the second frequency band can be basically canceled out, and the current in the second frequency band is approximately zero, thereby almost completely blocking the electromagnetic wave signal in the second frequency band generated by the second feed source 13.

[0113] Among them, the current in the second frequency band generated by the branch parts of the radiating branch 11 located on both sides of the first feeding point F1 is the feeding signal / electromagnetic wave signal of the second frequency band. When the current in the second frequency band on the second branch part Z2 is approximately zero, that is, the electromagnetic wave signal in the second frequency band is zero, the electromagnetic wave signal in the second frequency band generated by the first feed source 12 can be eliminated on the second branch part Z2 without being transmitted to the second feed source 13, thereby not causing interference to the second feed source 13.

[0114] Similarly, when the radiation branch 11 supports the reception and transmission of electromagnetic wave signals in the second frequency band under the stimulation of the second feed source 13, the branch parts of the radiation branch 11 located on both sides of the second feed point F2 will be stimulated to generate corresponding currents in the second frequency band, that is, the third branch part Z3 and the fourth branch part Z4 will be stimulated to generate corresponding currents in the second frequency band. Among them, the currents of the radiation branch 11 on the third branch part Z3 and the fourth branch part Z4 can also be decomposed into common-mode currents and differential-mode currents in the second frequency band, and the common-mode currents and differential-mode currents in the second frequency band on the third branch part Z3 are in phase, and through the setting of the electrical length of the fourth branch part Z4, the currents on the fourth branch part Z4 on the other side can be anti-phase. Therefore, as mentioned above, the third branch part Z3 receives and transmits electromagnetic wave signals in the second frequency band under the stimulation of the second feed source 13. Since the common mode current and the differential mode current in the second frequency band are in anti-phase, they can cancel each other out and weaken, thereby blocking the electromagnetic wave signal in the second frequency band generated by the second feed source 13. In particular, when the equivalent electrical length of the fourth branch portion Z4 satisfies the condition that the amplitudes of the anti-phase common mode current and the differential mode current in the second frequency band on the fourth branch portion Z4 are equal, the common mode current and the differential mode current in the second frequency band can be basically canceled out, and the current in the second frequency band is approximately zero, thereby almost completely blocking the electromagnetic wave signal in the second frequency band generated by the second feed source 13.

[0115] The electromagnetic wave signals of the second frequency band generated by the first feed source 12 and the second feed source 13 are also the feeding signals of the second frequency band generated by the first feed source 12 and the second feed source 13 .

[0116] In some embodiments, the equivalent electrical lengths of the second branch portion Z2 and the fourth branch portion Z4 are values ​​between λ2 / 3 and λ2, where λ2 is the wavelength corresponding to the second frequency band.

[0117] That is, in some embodiments, when the equivalent electrical lengths of the second branch portion Z2 and the fourth branch portion Z4 are values ​​of λ2 / 3 to λ2, the requirements of blocking the electromagnetic wave signals of the second frequency band generated by the first feed source 12 and the second feed source 13 can be met respectively.

[0118] Among them, as mentioned above, Figure 2 In the structure shown, the first branch part Z1 supports the second frequency band in order to work in a quarter-wavelength resonance mode under the excitation of the first feed source 12, and the third branch part Z3 supports the second frequency band in order to work in a quarter-wavelength resonance mode under the excitation of the second feed source 13. The equivalent electrical lengths of the first branch part Z1 and the third branch part Z3 may both be λ2 / 4, so that the common-mode current and the differential-mode current of the second frequency band on the first branch part Z1 and the third branch part Z3 are in phase, and can resonate better in the second frequency band. When the equivalent electrical length of the second branch portion Z2 and the fourth branch portion Z4 is a value of λ2 / 3 to λ2, the equivalent electrical length of the second branch portion Z2 and the fourth branch portion Z4 can be 1.5 to 4 times the equivalent electrical length of the first branch portion Z1 or the third branch portion Z3, respectively. At this time, it is conducive to the formation of anti-phase common mode current and differential mode current, and the common mode current and the differential mode current can be offset and weakened, so that the overall current of the second frequency band is weakened, and the electromagnetic wave signal of the second frequency band generated by the second feed source 13 is blocked. As mentioned above, when the equivalent electrical length of the second branch portion Z2 and the fourth branch portion Z4 respectively satisfies the amplitude of the anti-phase common mode current and differential mode current of the second frequency band on the second branch portion Z2 and the fourth branch portion Z4 is equal, the common mode current and differential mode current of the second frequency band can be basically offset, the current of the second frequency band is approximately zero, and almost all electromagnetic wave signals of the second frequency band are blocked.

[0119] Among them, in some embodiments, the first frequency band is lower than the second frequency band, and the wavelength corresponding to the first frequency band is longer than that corresponding to the second frequency band. Therefore, when the equivalent electrical length of the second branch part Z2 is 1.5 to 4 times the equivalent electrical length of the first branch part Z1, the equivalent electrical length of the second branch part Z2 will also roughly meet the resonance requirements of the first frequency band.

[0120] See also Figure 7 , which is a further structural diagram of the antenna assembly 1 in some embodiments of the present application.

[0121] in, Figure 7 In Figure 2 The structure of the antenna assembly 1 shown is illustrated by adding a further structure as an example.

[0122] like Figure 7 As shown, in some embodiments, the antenna assembly 1 further includes a parasitic branch 15, the parasitic branch 15 includes a third open-circuit end 15a and a first grounding end 15b opposite to each other, the first grounding end 15b is used for grounding, the third open-circuit end 15a of the parasitic branch 15 is adjacent to and spaced from the second open-circuit end 11b of the radiation branch 11, and the parasitic branch 15 is used to support the transmission and reception of electromagnetic wave signals in the corresponding frequency band under the coupling excitation of the first feed source 12 or the second feed source 13. Thus, it is beneficial to improve the radiation performance of the corresponding frequency band.

[0123] That is, in some embodiments, the antenna assembly 1 further includes the parasitic branch 15, which is used as a parasitic of the radiation branch 11 and can be coupled and excited to support the reception and transmission of electromagnetic wave signals in the corresponding frequency band, thereby improving the radiation performance of the corresponding frequency band.

[0124] In this application, "A" being close to or adjacent to "B" may mean that the distance between "A" and "B" is less than a certain distance, for example, less than 1 cm, and so on.

[0125] The equivalent electrical length of the parasitic branch 15 can meet the resonance requirements of the corresponding frequency band. Since one end of the parasitic branch 15 is open and the other end is grounded, the resonance mode of the parasitic branch 15 is a quarter-wavelength resonance mode, and the equivalent electrical length of the parasitic branch 15 can be one quarter of the wavelength corresponding to the corresponding frequency band.

[0126] In some embodiments, when the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13, the parasitic branch 15 may support the transmission and reception of electromagnetic wave signals in the first frequency band under the coupling excitation of the first feed source 12, or the parasitic branch 15 may support the transmission and reception of electromagnetic wave signals in the second frequency band under the coupling excitation of the first feed source 12 and / or the second feed source 13.

[0127] That is, in some embodiments, the equivalent electrical length of the parasitic branch 15 can meet the resonance requirement of the first frequency band, that is, it is one quarter of the wavelength corresponding to the first frequency band, and can support the transmission and reception of electromagnetic wave signals in the first frequency band under the coupling excitation of the first feed source 12. Alternatively, in some embodiments, the equivalent electrical length of the parasitic branch 15 can meet the resonance requirement of the second frequency band, that is, it is one quarter of the wavelength corresponding to the second frequency band, and can support the transmission and reception of electromagnetic wave signals in the second frequency band under the coupling excitation of the first feed source 12 and / or the second feed source 13.

[0128] Therefore, by adding the parasitic branches 15, the radiation performance of the corresponding frequency band can be effectively improved.

[0129] in, Figure 7 The difference between the antenna assembly 1 shown and the aforementioned antenna assembly 1 is that the parasitic branch 15 is further added. The other structures of the antenna assembly 1 can refer to the structures in any of the aforementioned embodiments.

[0130] See also Figure 8 , is another further structural schematic diagram of the antenna assembly 1 in some embodiments of the present application.

[0131] in, Figure 8 Also in Figure 2 The structure of the antenna assembly 1 shown is illustrated by adding a further structure as an example.

[0132] like Figure 8 As shown, in some embodiments, the antenna assembly 1 also includes a parasitic branch 15 and a matching filter circuit 16, the parasitic branch 15 includes a relative third open-circuit end 15a and a first grounding end 15b, the first grounding end 15b is used for grounding, and the third open-circuit end 15a of the parasitic branch 15 is adjacent to and spaced from the second open-circuit end 11b of the radiation branch 11. In some embodiments, the parasitic branch 15 also includes a matching point P1 located between the third open end 15a and the first ground end 15b, and the matching filter circuit 16 is connected between the matching point P1 and the ground GND. The matching filter circuit 16 is used to implement band-stop filtering of one of the frequency bands, and prevent the electromagnetic wave signals of one of the frequency bands from passing through, that is, filter out the electromagnetic wave signals of one of the frequency bands and allow the electromagnetic wave signals of other frequency bands to pass through. The parasitic branch 15 is used to support the reception and transmission of the electromagnetic wave signals of one of the frequency bands under the coupling excitation of the first feed source or the second feed source, and the parasitic branch part 151 between the third open end 15a of the parasitic branch 15 and the matching point P1 is used to support the reception and transmission of the electromagnetic wave signals of one of the other frequency bands under the coupling excitation of the first feed source 12 or the second feed source 13.

[0133] That is, in some embodiments, since the matched filter circuit 16 is used to implement the band-stop filtering of one of the frequency bands, preventing the electromagnetic wave signal of one of the frequency bands from passing through, the matching point P1 is an open circuit point and is not grounded relative to the frequency band, but is equivalent to a grounding point relative to other frequency bands. Therefore, the parasitic branch 15 is equivalent to forming two parasitic branch parts, which can be used as parasitics of two different frequency bands.

[0134] In some embodiments, the equivalent electrical length of the parasitic branch 15 can meet the resonance requirement of the frequency band blocked by the matching filter circuit 16, for example, it is one-fourth of the wavelength corresponding to the frequency band blocked by the matching filter circuit 16, and can support the reception and transmission of electromagnetic wave signals in the blocked frequency band under the coupling excitation of the first feed source 12 or the second feed source 13. In some embodiments, the parasitic branch portion 151 between the third open-circuit end 15a of the parasitic branch 15 and the matching point P1 can meet the resonance requirement of one of the other frequency bands outside the blocked frequency band, thereby supporting the reception and transmission of electromagnetic wave signals in one of the other frequency bands under the coupling excitation of the first feed source 12 or the second feed source 13.

[0135] Therefore, in some embodiments, the radiation performance of two frequency bands can be improved by the parasitic branch 15, which is beneficial to improving the radiation performance of the antenna assembly 1 working in multiple frequency bands.

[0136] In some embodiments, when the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13, the parasitic branch 15 can support the transmission and reception of electromagnetic wave signals in the first frequency band under the coupling excitation of the first feed source 12, and the parasitic branch part 151 of the parasitic branch 15 located between the third open end 15a and the matching point P1 can support the transmission and reception of electromagnetic wave signals in the second frequency band under the coupling excitation of the first feed source 12 and / or the second feed source 13.

[0137] That is, in some embodiments, the equivalent electrical length of the parasitic branch 15 can meet the resonance requirement of the first frequency band, that is, it is one quarter of the wavelength corresponding to the first frequency band, and can support the reception and transmission of electromagnetic wave signals in the first frequency band under the coupling excitation of the first feed source 12, and the equivalent electrical length of the parasitic branch part 151 can meet the resonance requirement of the second frequency band, that is, it is one quarter of the wavelength corresponding to the second frequency band, and can support the reception and transmission of electromagnetic wave signals in the second frequency band under the coupling excitation of the first feed source 12 and / or the second feed source 13.

[0138] As mentioned above, in some embodiments, the first frequency band is lower than the second frequency band, and therefore, the wavelength corresponding to the first frequency band will be longer than the wavelength corresponding to the second frequency band. Therefore, since the length of the parasitic branch portion 151 is less than the overall length of the parasitic branch portion 15, the equivalent electrical length of the parasitic branch portion 151 can be designed to meet the resonance requirements of the second frequency band, that is, one quarter of the wavelength corresponding to the second frequency band, and the equivalent electrical length of the parasitic branch portion 15 can be designed to meet the resonance requirements of the first frequency band, that is, one quarter of the wavelength corresponding to the first frequency band.

[0139] Thus, by increasing Figure 8 The parasitic branch 15 shown in the figure can effectively improve the radiation performance of at least two frequency bands, for example, improve the radiation performance of the first frequency band and the second frequency band.

[0140] in, Figure 8 The difference between the antenna assembly 1 shown and the aforementioned antenna assembly 1 is that the parasitic branch 15 and the matching filter circuit 16 are further added. The other structures of the antenna assembly 1 can refer to the structures in any of the aforementioned embodiments.

[0141] See also Fig. 9 , is a further structural schematic diagram of the antenna assembly 1 in some embodiments of the present application.

[0142] in, Fig. 9 Also in Figure 2 The structure of the antenna assembly 1 shown is illustrated by adding a further structure as an example.

[0143] In some embodiments, Fig. 9 As shown, the antenna assembly 1 also includes a switch module 17, which is electrically connected between the first feeding point F1, the second feeding point F2 and the first feed source 12, the second feed source 13, and is used to establish an electrical connection between the first feeding point F1 and the first feed source 12, and / or an electrical connection between the second feeding point F2 and the second feed source 13.

[0144] That is, in some embodiments, the antenna assembly 1 may also include the switch module 17 to establish an electrical connection between the first feed point F1 and the first feed source 12, or an electrical connection between the second feed point F2 and the second feed source 13, or, simultaneously establish an electrical connection between the first feed point F1 and the first feed source 12, and an electrical connection between the second feed point F2 and the second feed source 13.

[0145] Among them, as mentioned above, the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source 12, and the radiating branch 11 supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source 13. Therefore, since the radiating branch 11 supports the second frequency band under the excitation of the first feed source 12 and the second feed source 13, for the second frequency band, the beam direction of the second frequency band can be changed by different branch parts in the radiating branch 11 being excited by the first feed source 12 and / or the second feed source 13, and the beam direction of the second frequency band can be changed as needed to meet the demand for different beam directions of the second frequency band.

[0146] Wherein, in some embodiments, Fig. 9 As shown, the switch module 17 may include two single-pole single-throw switches SW1, one of which may be located in the connection path between the first feed point F1 and the first feed source 12, and the other single-pole single-throw switch SW1 may be located in the connection path between the second feed point F2 and the second feed source 13, so that the electrical connection between the first feed point F1 and the first feed source 12, and / or the electrical connection between the second feed point F2 and the second feed source 13 can be established by the two single-pole single-throw switches SW1 being in an on or off state.

[0147] in, Fig. 9 In the embodiment, the switch module 17 is further located between the matching unit 14 and the first feed source 12 and the second feed source 13. That is, in some embodiments, when the matching unit 14 includes the first matching element M1 and the second matching element M2, one of the single-pole single-throw switches SW1 of the switch module 17 may be specifically located between the first matching element M1 and the first feed source 12, and another single-pole single-throw switch SW1 may be specifically located between the second matching element M2 and the second feed source 13.

[0148] Obviously, in some embodiments, the switch module 17 may also be located between the matching unit 14 and the first feeding point F1 and the second feeding point F2.

[0149] Among them, as mentioned above, Fig. 9 In Figure 2 The structure of the antenna assembly 1 shown in the figure is further increased. It is obvious that in some embodiments, it can also be Figure 7 or Figure 8 The switch module 17 is added to the structure of the antenna assembly 1 shown.

[0150] In some embodiments, the first frequency band and the second frequency band may be any suitable frequency bands, and as mentioned above, the first frequency band is lower than the second frequency band.

[0151] Among them, in the present application, the first frequency band being lower than the second frequency band may include: the upper limit value of the frequency range corresponding to the first frequency band is lower than the lower limit value of the frequency range corresponding to the second frequency band, or the center frequency / resonant frequency corresponding to the first frequency band is lower than the center frequency / resonant frequency corresponding to the second frequency band.

[0152] In some embodiments, the first frequency band and the second frequency band are both WiFi frequency bands, and the first frequency band is the WiFi 2.4G frequency band, and the second frequency band is the WiFi 5G frequency band. Obviously, in some embodiments, the first frequency band and the second frequency band may also be other frequency bands, for example, the first frequency band is a low frequency band such as B5, and the second frequency band is a medium or high frequency band such as B41, or the first frequency band is a GPS frequency band, and the second frequency band is a medium or high frequency band such as B41, and so on.

[0153] Thus, the antenna assembly 1 of the present application, through the above structure, the radiating branch 11 supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source 12, the second feed source 13 is connected to the second feed point F2, and the radiating branch 11 also supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source 13. Since the at least one frequency band supported by the radiating branch 11 under the excitation of the first feed source 12 is at least partially different from the at least one frequency band supported by the radiating branch 11 under the excitation of the second feed source 13, the radiating branch 11 can be shared by the two feed sources to support the corresponding frequency band, which can improve the compactness of the overall structure, effectively reduce the space occupied, and can realize at least two frequency bands to meet the requirements of multiple frequency bands. In addition, the matching unit 14 effectively realizes the isolation of at least part of the signal between the first feed source 12 and the second feed source 13, and can reduce or avoid the mutual interference when the two feed sources share the radiating branch 11, effectively improving the antenna performance.

[0154] See also Fig.10 , is a structural block diagram of an electronic device 100 in some embodiments of the present application. Fig.10As shown, the electronic device 100 may include the antenna assembly 1 described in any of the aforementioned embodiments. Thus, the electronic device 100 is equipped with the antenna assembly 1 in any of the aforementioned embodiments, the radiation branch 11 supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source 12, the second feed source 13 is connected to the second feed point F2, and the radiation branch 11 also supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source 13. Since at least one frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 is at least partially different from at least one frequency band supported by the radiation branch 11 under the excitation of the second feed source 13, the radiation branch 11 can be shared by two feed sources to support the corresponding frequency band, which can improve the compactness of the overall structure, effectively reduce the occupation of space, and can achieve at least two frequency bands to meet the needs of multiple frequency bands. In addition, the matching unit 14 can effectively isolate at least part of the signal between the first feed source 12 and the second feed source 13, thereby reducing or avoiding mutual interference when the two feed sources share the radiation branch 11, and effectively improving the antenna performance.

[0155] See also Fig.11 , is a schematic plan view of an electronic device 100 in some embodiments of the present application. Fig.11 The structure of the antenna assembly 1 is shown in a top view from the back side of the electronic device 100, that is, from the side away from the display screen. Figure 1-Figure 2 The antenna assembly 1 shown in the figures may also be the antenna assembly 1 viewed from the back side of the electronic device 100 .

[0156] in, Fig.11 The electronic device 100 includes Figure 7 The antenna assembly 1 shown is used as an example for illustration.

[0157] Among them, Fig.11 As shown, the electronic device 100 further includes a frame B1 , and at least the radiation branch 11 is arranged on the frame B1 of the electronic device 100 .

[0158] That is, in some embodiments, the radiation branch 11 may be specifically disposed at the border B1 of the electronic device 100. In some embodiments, when the antenna assembly 1 further includes the parasitic branch 15, the parasitic branch 15 may also be disposed at the border B1 of the electronic device 100.

[0159] Among them, Fig.11As shown, there is a gap X1 between the radiation branch 11 and the adjacent branch. In some embodiments, when the antenna assembly 1 further includes the parasitic branch 15, there is a gap X1 between the radiation branch 11 and the parasitic branch 15, and the radiation branch 11 and the parasitic branch 15 are spaced apart by the gap X1.

[0160] In some embodiments, Fig.11 As shown, the frame B1 of the electronic device 100 is a metal frame, and the radiation branch 11 and the parasitic branch 15 are metal frame segments formed by opening the gap X1 in the metal frame of the electronic device 100 .

[0161] In some other embodiments, the frame B1 of the electronic device 100 is a non-metal frame, and the radiation branches 11 and the parasitic branches 15 are metal segments disposed in the frame of the electronic device 100 .

[0162] 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 11 and the parasitic branch 15 are metal segments arranged in the frame B1 of the electronic device 100. The radiation branch 11 and the parasitic branch 15 may be embedded in the frame of the electronic device 100, or arranged on the inner side of the frame of the electronic device 100.

[0163] Among them, in the electronic device 100 of the present application, when the radiation branch 11 and the parasitic branch 15 are arranged at the border B1 of the electronic device 100, due to the compact structure and the small space occupied, the utilization rate of the mobile phone border area can be further improved, and higher freedom support can be provided for antenna design in complex environments.

[0164] like Fig.11 As shown, the frame B1 includes two opposite long frames B11 and two opposite short frames B12 , wherein the radiation branches 11 and the parasitic branches 15 can be arranged in one of the long frames B11 .

[0165] Among them, as mentioned above, Fig.11 The electronic device 100 includes Figure 7 The antenna assembly 1 shown is used as an example for illustration. Obviously, the electronic device 100 may include the antenna assembly 1 in any of the above embodiments. Fig.11 Part of the reference numerals of the antenna assembly 1 are omitted. For details, see Figure 7 .

[0166] In some embodiments, the surface with the largest area of ​​the radiation branch 11 and the parasitic branch 15 is a surface parallel to the frame surface of the frame B1 , wherein the frame surface of the frame B1 is substantially perpendicular to the plane of the display screen of the electronic device 100 .

[0167] Among them, Fig.11 The electronic device 100 includes a top D11, a bottom D12, and two side edges D13 and D14. The two long frames B11 are frames located at the two side edges D13 and D14 of the electronic device 100, respectively, and the two short frames B12 are frames located at the top D11 and the bottom D12 of the electronic device 100, respectively.

[0168] In some embodiments, the radiation branch 11 and the parasitic branch 15 are both in the shape of straight strips. The radiation branch 11 and the parasitic branch 15 are both disposed on one of the side ends of the electronic device 100, such as the side end D13. Fig.11 As shown, in some embodiments, the parasitic branch 15 is closer to the top D11 of the electronic device 100 than the radiation branch 11 .

[0169] in, Fig.11 This is just an example. In some embodiments, the radiation branch 11 may be bent, and the radiation branch 11 includes two sub-branches connected at an angle, one sub-branch of the radiation branch 11 is arranged at the top D11 of the electronic device 100, and the other sub-branch of the radiation branch 11 is arranged at a side end of the electronic device 100, such as the side end D13, and the parasitic branch 15 is arranged at a position close to the top D11 on the side end D13. That is, in some embodiments, by setting the radiation branch 11 as two sub-branches connected at an angle, the top angle position can be utilized to avoid being held by the user, thereby improving the radiation performance. Alternatively, in some embodiments, the radiation branch 11 and the parasitic branch 15 are both arranged at one of the side ends of the electronic device 100, such as the side end D13, and the radiation branch 11 is closer to the top D11 of the electronic device 100 than the parasitic branch 15.

[0170] 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 D12 of the electronic device 100 is the end where the headphone jack and the USB port are provided, and the top end D11 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.

[0171] like Fig.11 As shown, in some embodiments, the electronic device further includes a ground plate 101 , and the aforementioned ground GND may be the ground plate 101 .

[0172] In some embodiments, the aforementioned components are grounded. For example, the aforementioned grounding terminal can be grounded by connecting to the ground plate 101. In some embodiments, the radiation branch 11 can also effectively excite the floor current of the ground plate 101 under the excitation of the corresponding feeding unit, thereby effectively improving the antenna radiation performance in the low-frequency band.

[0173] That is, in some embodiments, when the radiating branch 11 operates in a quarter-wavelength mode and supports the reception and transmission of electromagnetic wave signals in the low-frequency band, the radiating branch 11 not only generates a feeding current itself, but also stimulates the grounding plate 101 to generate a ground current, thereby effectively improving the antenna radiation performance in the low-frequency band.

[0174] like Fig.11 As shown, the electronic device 100 further includes a mainboard 102, wherein the first feed source 12, the second feed source 13, the matching unit 14, etc. mentioned above may be arranged on the mainboard 102. In some embodiments, the grounding plate 101 may be at least a part of the grounding layer on the mainboard 102.

[0175] Among them, Fig.11 As shown, the electronic device 100 further includes a middle frame 103, which is used to support structures such as a display screen, and the middle frame 103 is used as the ground of the entire device. The grounding layer on the motherboard 102 is connected to the middle frame 103 to provide a ground potential. In some embodiments, the grounding plate 101 may be at least a portion of the middle frame 103, and the aforementioned ground GND may also be at least a portion of the middle frame 103. Fig.11 In the figure, the ground plate 101 is taken as the middle frame 103 as an example for illustration.

[0176] The frame B1 of the electronic device 100 may also be provided with other antenna radiation branches, which are spaced apart by gaps X1. Since they are not related to the improvement of the present application, these other antenna radiation branches are not illustrated.

[0177] See also Fig.12 , is a schematic diagram of current distribution when the antenna assembly 1 of the electronic device 100 in some embodiments of the present application operates in the first frequency band.

[0178] in, Fig.12 Specifically Fig.11 The current distribution diagram of the first frequency band obtained by simulation test using the electronic device 100 working in the first frequency band as an example. Fig.11 The matching unit 14 of the antenna assembly 1 of the electronic device 100 shown may be Figure 4 The structure shown.

[0179] Among them, as mentioned above, Fig.11 In the structure of the electronic device 100 shown, the electromagnetic wave signal in the first frequency band is mainly supported and generated by the second branch part Z2 of the radiation branch 11.

[0180] in, Fig.12 In the figure, the redder the area, that is, the darker the area, the greater the corresponding current intensity, which is the main radiation area of ​​the electromagnetic wave signal in the first frequency band. Fig.12 As shown, the current i1 of the first frequency band is mainly distributed on the second branch part Z2 of the radiation branch 11 , that is, as mentioned above, the second branch part Z2 supports the reception and transmission of the electromagnetic wave signal of the first frequency band under the excitation of the first feed source 12 .

[0181] See also Fig.13 , which is a schematic diagram of return loss and isolation of the antenna assembly 1 of the electronic device 100 in some embodiments of the present application when operating in the first frequency band and the second frequency band.

[0182] in, Fig.13 Specifically, Fig.11 The return loss and isolation are obtained by taking the electronic device 100 working in the first frequency band and the second frequency band as an example. Fig.11 The matching unit 14 of the antenna assembly 1 of the electronic device 100 shown may also be Figure 4 The structure shown.

[0183] in, Fig.13Schematically shows the return loss curve S11 of the first frequency band and the second frequency band supported by the radiating branch 11 under the stimulation of the first feed source 12, the return loss curve S22 of the second frequency band supported by the radiating branch 11 under the stimulation of the second feed source 13, and the isolation curve Sg1. The isolation curve Sg1 is the isolation between the first frequency band and the second frequency band supported by the radiating branch 11 under the stimulation of the first feed source 12, and the second frequency band supported by the radiating branch 11 under the stimulation of the second feed source 13, which can also be regarded as the isolation between the first feed source 12 and the second feed source 13.

[0184] The frequency corresponding to the trough of the return loss curve is usually also the resonant frequency of the corresponding frequency band. The lower the return loss, the higher the efficiency in the frequency band. The lower the isolation value corresponding to the isolation curve Sg1, the better the isolation.

[0185] in, Fig.13 In the figure, the first frequency band is the WiFi 2.4G frequency band and the second frequency band is the WiFi 5G frequency band.

[0186] Among them, from Fig.13 It can be seen that at the resonant frequency corresponding to the WiFi 2.4G band (approximately 2.45GHz), the return loss is only -15dB, and at the resonant frequency corresponding to the WiFi 5G band (approximately 5.45GHz), the return loss of the radiation branch 11 when supporting the second frequency band under the excitation of the first feed source 12 is only -16dB, and the return loss of the radiation branch 11 when supporting the second frequency band under the excitation of the second feed source 13 is even lower, only -18.5dB. In addition, the isolation value at the resonant frequency corresponding to the WiFi 2.4G band (approximately 2.45GHz) is only -29dB, and the isolation value at the resonant frequency corresponding to the WiFi 5G band (approximately 5.45GHz) is even lower than -30dB, and the isolation is very good.

[0187] It can be seen that the electronic device 100 in the present application, when including the aforementioned antenna assembly 1, can share the radiation branch 11 to support multiple frequency bands, and the radiation efficiency of each frequency band is very good, and the isolation between the radiation branches 11 is also very good when they are shared.

[0188] See also Fig.14 , is a schematic diagram of current distribution when the antenna assembly 1 of the electronic device 100 in some embodiments of the present application operates in the second frequency band.

[0189] in, Fig.14 Specifically Fig.11The current distribution diagram of the second frequency band obtained by simulation test when the radiation branch 11 in the antenna assembly 1 in the electronic device 100 supports the second frequency band under the excitation of the first feed source 12 is shown. Fig.14 The matching unit 14 of the antenna assembly 1 of the electronic device 100 shown may also be Figure 4 The structure shown.

[0190] As mentioned above, when the radiation branch 11 supports the second frequency band under the excitation of the first feed source 12, mainly the first branch part Z1 of the radiation branch 11 supports the second frequency band under the excitation of the first feed source 12. Fig.14 It can be seen that when the radiation branch 11 supports the second frequency band under the excitation of the first feed source 12 , the current i2 is mainly distributed on the first branch part Z1 .

[0191] See also Fig.15 , is another schematic diagram of current distribution when the antenna assembly 1 of the electronic device 100 in some embodiments of the present application operates in the second frequency band.

[0192] in, Fig.15 Specifically Fig.11 The current distribution diagram of the second frequency band obtained by simulation test when the radiation branch 11 in the antenna assembly 1 in the electronic device 100 supports the second frequency band under the excitation of the second feed source 13 is shown. Fig.15 The matching unit 14 of the antenna assembly 1 of the electronic device 100 shown may also be Figure 4 The structure shown.

[0193] As mentioned above, when the radiation branch 11 supports the second frequency band under the excitation of the second feed source 13, mainly the third branch part Z3 of the radiation branch 11 supports the second frequency band under the excitation of the second feed source 13. Fig.15 It can be seen that when the radiation branch 11 supports the second frequency band under the excitation of the second feed source 13 , the current i3 is mainly distributed on the third branch part Z3 .

[0194] See also Fig.16 , is a schematic diagram of the antenna efficiency of the antenna assembly 1 of the electronic device 100 in some embodiments of the present application when operating in the first frequency band and the second frequency band.

[0195] in, Fig.16 Specifically, Fig.11 The return loss and isolation are obtained by taking the electronic device 100 working in the first frequency band and the second frequency band as an example. Fig.11 The matching unit 14 of the antenna assembly 1 of the electronic device 100 shown may also be Figure 4 The structure shown.

[0196] in, Fig.16 The figure shows the radiation efficiency curve Sr1 of the first frequency band and the second frequency band supported by the radiation branch 11 under the excitation of the first feed source 12 and the system total efficiency curve St1, and the radiation efficiency curve Sr2 of the second frequency band supported by the radiation branch 11 under the excitation of the second feed source 13 and the system total efficiency curve St2.

[0197] The frequency corresponding to the trough of the return loss curve is usually also the resonant frequency of the corresponding frequency band. The lower the return loss, the higher the efficiency in the frequency band. The lower the isolation value corresponding to the isolation curve Sg1, the better the isolation.

[0198] in, Fig.16 In the figure, the first frequency band is the WiFi 2.4G frequency band and the second frequency band is the WiFi 5G frequency band.

[0199] Among them, from Fig.16 It can be seen that in the first frequency band, that is, at the resonant frequency corresponding to the WiFi 2.4G frequency band (approximately 2.45GHz), the radiation efficiency and the total system efficiency both reached approximately -3.5dB, and at the resonant frequency corresponding to the WiFi 5G frequency band (approximately 5.45GHz), the radiation efficiency and the total system efficiency of the radiation branch 11 when supporting the second frequency band under the excitation of the first feed source 12 reached approximately -1.9dB, and the radiation efficiency and the total system efficiency of the radiation branch 11 when supporting the second frequency band under the excitation of the second feed source 13 also reached approximately -2.5dB, and both the radiation efficiency and the total system efficiency were very high.

[0200] It can be seen that the electronic device 100 in the present application, when including the aforementioned antenna assembly 1, can share the radiation branch 11 to support multiple frequency bands, and the radiation efficiency of each frequency band and the overall system efficiency are very high, thereby achieving better antenna radiation performance.

[0201] See also Fig.17 , is a schematic diagram of the antenna direction of the antenna assembly 1 of the electronic device 100 in some embodiments of the present application when operating in the second frequency band.

[0202] in, Fig.17 Specifically Fig.11 The antenna direction diagram shown is a schematic diagram of the antenna direction obtained by simulation test when the radiation branch 11 in the antenna assembly 1 in the electronic device 100 supports the second frequency band under the excitation of the first feed source 12. Fig.17 The matching unit 14 of the antenna assembly 1 of the electronic device 100 shown may also be Figure 4 The structure shown.

[0203] As mentioned above, when the radiating branch 11 supports the second frequency band under the excitation of the first feed source 12, it is mainly the first branch part Z1 of the radiating branch 11 that supports the second frequency band under the excitation of the first feed source 12. At this time, the antenna direction of the antenna assembly 1, that is, the beam direction R1 is mainly toward one side of the first branch part Z1.

[0204] See also Fig.18 , is another antenna direction schematic diagram of the antenna assembly 1 of the electronic device 100 in some embodiments of the present application when operating in the second frequency band.

[0205] in, Fig.18 Specifically Fig.11 The antenna direction diagram shown is a schematic diagram of the antenna direction obtained by simulation test when the radiation branch 11 in the antenna assembly 1 in the electronic device 100 supports the second frequency band under the excitation of the second feed source 13. Fig.18 The matching unit 14 of the antenna assembly 1 of the electronic device 100 shown may also be Figure 4 The structure shown.

[0206] As mentioned above, when the radiating branch 11 supports the second frequency band under the excitation of the second feed source 13, it is mainly the third branch part Z3 of the radiating branch 11 that supports the second frequency band under the excitation of the second feed source 13. At this time, the antenna direction of the antenna assembly 1, that is, the beam direction R1 is mainly toward one side of the third branch part Z3.

[0207] Thus, in the antenna assembly 1 of the present application, the beam direction of the radiating branch 11 when supporting the second frequency band under the excitation of the first feed source 12 is different from the beam direction of the radiating branch 11 when supporting the second frequency band under the excitation of the second feed source 13. Therefore, the beam direction of the second frequency band can be switched as needed, and can be adapted to the needs for different beam directions in different scenarios.

[0208] Among them, in some embodiments, the beam direction of the second frequency band may be selected to be switched according to the state of the electronic device 100. For example, the state of the electronic device 100 may be the current communication signal quality state of the electronic device 100, and whether to switch the beam direction of the second frequency band is determined according to the communication signal quality state when the electronic device 100 is currently operating in the second frequency band. For example, when the signal quality of the electronic device 100 is currently operating in the second frequency band is lower than the preset signal quality, the beam direction of the second frequency band may be switched, and when it is determined that the signal quality of other beam directions is better, the current beam direction may be maintained.

[0209] In some embodiments, the state of the electronic device 100 may include a placement state, etc. The beam direction of the second frequency band, such as the WiFi 2.4G frequency band, may be changed according to the placement state of the electronic device 100 and the proximity state of a human body.

[0210] In some embodiments, as described above, the antenna assembly 1 also includes the switch module 17, and the switch module 17 can establish an electrical connection between the first feed point F1 and the first feed source 12, or an electrical connection between the second feed point F2 and the second feed source 13, or, simultaneously establish an electrical connection between the first feed point F1 and the first feed source 12, and an electrical connection between the second feed point F2 and the second feed source 13. As described above, the beam direction of the radiating branch 11 when supporting the second frequency band under the excitation of the first feed source 12 is different from the beam direction of the radiating branch 11 when supporting the second frequency band under the excitation of the second feed source 13. Therefore, in some embodiments, the beam direction of the second frequency band can be changed by controlling the switch module 17 to establish an electrical connection between the first feed point F1 and the first feed source 12, or an electrical connection between the second feed point F2 and the second feed source 13, or by simultaneously establishing an electrical connection between the first feed point F1 and the first feed source 12, and an electrical connection between the second feed point F2 and the second feed source 13.

[0211] See also Fig.19 , is a more specific structural block diagram of the electronic device 100 in some embodiments of the present application. Fig.19 As shown, the electronic device 100 further includes a controller 2 .

[0212] The controller 2 is at least used to control switching of the beam direction of the second frequency band according to the state of the electronic device 100. That is, the controller 2 can control the switch module 17 to establish an electrical connection between the first feeding point F1 and the first feed source 12, or an electrical connection between the second feeding point F2 and the second feed source 13, or simultaneously establish an electrical connection between the first feeding point F1 and the first feed source 12, and an electrical connection between the second feeding point F2 and the second feed source 13, so as to change the beam direction of the second frequency band.

[0213] In some embodiments, as mentioned above, the state of the electronic device 100 may include a placement state, etc. The controller 2 may control the switch module 17 to establish different electrical connection relationships according to the placement state, etc. of the electronic device 100, so as to change the beam direction of the second frequency band.

[0214] Specifically, as mentioned above, the switch module 17 may include two single-pole single-throw switches SW1, one of which may be located in the connection path between the first feed point F1 and the first feed source 12, and the other single-pole single-throw switch SW1 may be located in the connection path between the second feed point F2 and the second feed source 13, so that the electrical connection between the first feed point F1 and the first feed source 12 and / or the electrical connection between the second feed point F2 and the second feed source 13 can be established by the two single-pole single-throw switches SW1 being in an on or off state. Therefore, the controller 2 can establish the electrical connection between the first feed point F1 and the first feed source 12 and / or the electrical connection between the second feed point F2 and the second feed source 13 by controlling the two single-pole single-throw switches SW1 to be in an on or off state.

[0215] For example, in some embodiments, when the placement state of the electronic device 100 is with the top end D11 facing upward and the bottom end D12 facing downward, because in some embodiments, the parasitic branch 15 is closer to the side of the top end D11 relative to the radiating branch 11, that is, the side of the third branch part Z3 is closer to the top end D11 relative to the first branch part Z1, then the controller 2 can control the switch module 17 to establish an electrical connection between the second feeding point F2 and the second feed source 13. As mentioned above, at this time, the beam direction of the second frequency band, that is, the WiFi 2.4G frequency band, is toward the side of the third branch part Z3, that is, toward the side of the top end D11, so that it will not be blocked by the hands or the body, thereby ensuring the communication performance of the WiFi 2.4G frequency band, and so on.

[0216] In some embodiments, Fig.19 As shown, the electronic device 100 further includes a sensor 3, through which the state of the electronic device is acquired, wherein the sensor 3 includes at least one of a gyroscope and a proximity sensor.

[0217] For example, when the sensor 3 includes a gyroscope, the sensor 3 can generate a corresponding posture sensing signal by sensing the placement state / posture of the electronic device 100. The controller 2 is connected to the sensor 3 to obtain the posture sensing signal generated by the sensor 3 and determine the placement state of the electronic device 100 based on the posture sensing signal.

[0218] In some embodiments, the state of the electronic device 100 may be the current communication signal quality state of the electronic device 100, and whether to switch to other frequency band combinations is determined according to the communication signal quality state of a group of frequency band combinations currently operated by the electronic device 100. For example, when the signal quality of a group of frequency band combinations currently operated by the electronic device 100 is lower than the preset signal quality, it may be switched to other groups of frequency band combinations, and when it is determined that the signal quality of other groups of frequency band combinations is better, it may stay in other groups of frequency band combinations.

[0219] Among them, the controller 2 can obtain the reference signal received power (Reference Signal Received Power) of each frequency band of a group of frequency band combinations currently operating, and determine the comprehensive reference signal received power of the group frequency band combination based on the reference signal received power of each frequency band. For example, the weighted average of the reference signal received powers of all frequency bands in the group frequency band combination can be calculated based on the reference signal received power of each frequency band and its weight, and used as the comprehensive reference signal received power.

[0220] As mentioned above, the electronic device 100 may further include the antenna assembly 1 in any of the aforementioned embodiments, which will not be illustrated one by one through the drawings herein.

[0221] The electronic device 100 also includes a memory, a battery, etc., which are irrelevant to the improvement of the present application and will not be described in detail.

[0222] The electronic device 100 of the present application may be a mobile phone, a tablet computer, a laptop computer or other electronic device.

[0223] The controller 2 may be a central processing unit, a single chip microcomputer, a digital signal processor, a microcontroller, etc.

[0224] Among them, the switches such as the single-pole single-throw switch SW1 can be digitally controlled switches, for example, transistors such as MOS tubes, and can be turned on or off under the control of the controller 2 to establish an electrical connection between the first feeding point F1 and the first feed source 12, or an electrical connection between the second feeding point F2 and the second feed source 13, or, at the same time, establish an electrical connection between the first feeding point F1 and the first feed source 12, and an electrical connection between the second feeding point F2 and the second feed source 13.

[0225] Among them, other structures of the antenna assembly 1 included in the electronic device 100 can refer to the introduction in any of the above embodiments, and will not be repeated here.

[0226] The electronic device 100 also includes a memory, a battery, etc., which are irrelevant to the improvement of the present application and will not be described in detail.

[0227] The electronic device 100 of the present application may be a mobile phone, a tablet computer, a laptop computer or other electronic device.

[0228] Through the antenna assembly 1 and the electronic device 100 in the present application, the radiating branch 11 supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the stimulation of the first feed source 12, the second feed source 13 is connected to the second feed point F2, and the radiating branch 11 also supports the reception and transmission of electromagnetic wave signals of at least one frequency band under the stimulation of the second feed source 13. Since the at least one frequency band supported by the radiating branch 11 under the stimulation of the first feed source 12 is at least partially different from the at least one frequency band supported by the radiating branch 11 under the stimulation of the second feed source 13, the radiating branch 11 can be shared by the two feed sources to support the corresponding frequency band, which can improve the compactness of the overall structure, effectively reduce the space occupied, and can realize at least two frequency bands to meet the requirements of multiple frequency bands. In addition, the matching unit 14 effectively realizes the isolation of at least part of the signal between the first feed source 12 and the second feed source 13, and can reduce or avoid the mutual interference when the two feed sources share the radiating branch 11, effectively improving the antenna performance.

[0229] 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.

[0230] 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: A radiation branch, comprising a first feeding point and a second feeding point; A first feed source connected to the first feeding point, wherein the radiation branch supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the first feed source; a second feed source connected to the second feed point, wherein the radiating branch also supports the transmission and reception of electromagnetic wave signals of at least one frequency band under the excitation of the second feed source, wherein the at least one frequency band supported by the radiating branch under the excitation of the first feed source is at least partially different from the at least one frequency band supported by the radiating branch under the excitation of the second feed source; A matching unit is connected between the first feed source, the second feed source and the first feeding point and the second feeding point, and is used to achieve impedance matching of corresponding frequency bands and to achieve isolation of at least part of the signal between the first feed source and the second feed source.

2. The antenna assembly according to claim 1, characterized in that: The radiation branch supports at least two frequency bands under the excitation of the first feed source, and at least one frequency band supported by the radiation branch under the excitation of the second feed source is a frequency band among the at least two frequency bands supported by the radiation branch under the excitation of the first feed source.

3. The antenna assembly according to claim 2, characterized in that: The radiation branch supports the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source, and the radiation branch supports the transmission and reception of electromagnetic wave signals in the second frequency band under the excitation of the second feed source.

4. The antenna assembly according to claim 3, characterized in that: The radiating branch includes a first open end and a second open end opposite to each other, the first feeding point is located between the first open end and the second feeding point, the second feeding point is located between the first feeding point and the second open end, the radiating branch includes a first branch part, a second branch part and a third branch part, the first branch part is a branch part between the first open end and the first feeding point, the second branch part is a branch part between the first feeding point and the second open end, the third branch part is a branch part between the second feeding point and the second open end, wherein the first branch part supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the first feed source, the second branch part supports the reception and transmission of electromagnetic wave signals in the first frequency band under the excitation of the first feed source, and the third branch part receives and transmits electromagnetic wave signals in the second frequency band under the excitation of the second feed source.

5. The antenna assembly according to claim 4, characterized in that: The equivalent electrical length of the second branch part is λ1 / 4, and the equivalent electrical lengths of the first branch part and the third branch part are λ2 / 4, wherein λ1 is the wavelength corresponding to the first frequency band, and λ2 is the wavelength corresponding to the second frequency band. The first branch part operates in a quarter-wavelength resonance mode under the excitation of the first feed source and supports the reception and transmission of electromagnetic wave signals in the second frequency band. The second branch part operates in a quarter-wavelength resonance mode under the excitation of the first feed source and supports the reception and transmission of electromagnetic wave signals in the first frequency band. The third branch part operates in a quarter-wavelength resonance mode under the excitation of the second feed source and supports the reception and transmission of electromagnetic wave signals in the second frequency band.

6. The antenna assembly according to claim 1, characterized in that: The matching unit is at least used to achieve isolation between the first feed source and the second feed source of electromagnetic wave signals in one frequency band supported by the radiation branch under the excitation of the first feed source or the second feed source.

7. The antenna assembly according to claim 3, characterized in that: The matching unit includes an impedance matching module and an isolation module. The impedance matching module is used to achieve impedance matching between the first frequency band and the second frequency band. The isolation module is at least used to achieve signal isolation of electromagnetic wave signals in the first frequency band between the first feed source and the second feed source.

8. The antenna assembly according to claim 7, characterized in that: The impedance matching module includes a first matching element and a second matching element. The first matching element is connected between the first feed source and the first feeding point, and is used to achieve impedance matching between the first frequency band and the second frequency band when the radiating branch supports the reception and transmission of electromagnetic wave signals in the first frequency band and the second frequency band under the excitation of the first feed source. The second matching element is connected between the second feed source and the second feeding point, and is used to achieve impedance matching in the second frequency band when the radiating branch supports the reception and transmission of electromagnetic wave signals in the second frequency band under the excitation of the second feed source.

9. The antenna assembly according to claim 8, characterized in that: The isolation module is at least used to cooperate to form two conduction paths for the electromagnetic wave signal in the first frequency band, so that the phase difference of the electromagnetic wave signal in the first frequency band when it is conducted from the first feed source to the second feed source through the two conduction paths is 180°.

10. The antenna assembly according to claim 9, characterized in that: The isolation module includes a third matching element, a fourth matching element and a fifth matching element, the third matching element is connected between the first matching element and the first feeding point, the fourth matching element is connected between the second matching element and the second feeding point, and the fifth matching element is connected between the first connection point and the second connection point, the first connection point is the connection point between the third matching element and the first matching element, and the second connection point is the connection point between the fourth matching element and the second matching element, wherein the two conduction paths include a first conduction path and a second conduction path, the first conduction path includes a path passing through the first matching element, the third matching element, a branch portion of the radiation branch located between the first feeding point and the second feeding point, the fourth matching element, and the second matching element, and the second conduction path includes a path passing through the first matching element, the fifth matching element, and the second matching element.

11. The antenna assembly according to claim 7, characterized in that: The isolation module includes a filtering circuit for filtering out the electromagnetic wave signal in the first frequency band, thereby achieving signal isolation of the electromagnetic wave signal in the first frequency band between the first feed source and the second feed source.

12. The antenna assembly according to claim 4, characterized in that: The equivalent electrical length of the second branch part meets the requirement of blocking the electromagnetic wave signal of the second frequency band generated by the first feed source. The radiating branch also includes a fourth branch part, which is the branch part between the first open-circuit end of the radiating branch and the second feeding point. The equivalent electrical length of the fourth branch part meets the requirement of blocking the electromagnetic wave signal of the second frequency band generated by the second feed source.

13. The antenna assembly according to claim 11, characterized in that: The equivalent electrical lengths of the second branch portion and the fourth branch portion are values ​​between λ2 / 3 and λ2, where λ2 is a wavelength corresponding to the second frequency band.

14. The antenna assembly according to claim 1, characterized in that The antenna assembly also includes a parasitic branch, which includes a third open-circuit end and a first grounding end relative to each other. The third open-circuit end of the parasitic branch is adjacent to and spaced apart from the second open-circuit end of the radiating branch. The parasitic branch is used to support the reception and transmission of electromagnetic wave signals in the corresponding frequency band under the coupling excitation of the first feed source or the second feed source.

15. The antenna assembly according to claim 1, characterized in that The antenna assembly also includes a parasitic branch and a matching filter circuit, the parasitic branch includes a third open-circuit end and a first grounding end relative to each other, the parasitic branch includes a matching point located between the third open-circuit end and the first grounding end, the matching filter circuit is connected between the matching point and the ground, the matching filter circuit is used to implement band-stop filtering of one of the frequency bands, thereby preventing the electromagnetic wave signals of one of the frequency bands from passing through, and allowing the electromagnetic wave signals of other frequency bands to pass through, the parasitic branch is used to support the reception and transmission of the electromagnetic wave signals of one of the frequency bands under the coupling excitation of the first feed source or the second feed source, and the parasitic branch part between the third open-circuit end of the parasitic branch and the matching point is used to support the reception and transmission of the electromagnetic wave signals of one of the other frequency bands under the coupling excitation of the first feed source or the second feed source.

16. The antenna assembly according to claim 3, characterized in that: The antenna assembly also includes a switch module, which is electrically connected between the first feed point, the second feed point and the first feed source, the second feed source, and is used to establish an electrical connection between the first feed point and the first feed source, and / or an electrical connection between the second feed point and the second feed source.

17. The antenna assembly according to claim 3, characterized in that: The first frequency band is the WiFi 2.4G frequency band, and the second frequency band is the WiFi 5G frequency band.

18. An electronic device, characterized in that: The electronic device comprises the antenna assembly as described in any one of claims 1-17.

19. The electronic device according to claim 18, characterized in that: The electronic device further includes a frame, and the first radiation branch and the second radiation branch are metal segments arranged on the frame.

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