Antenna assembly and electronic device

Abstract

The embodiment of the present application provides an antenna assembly, which comprises a first antenna unit, a second antenna unit and a third antenna unit. The first antenna unit is located between the second antenna unit and the third antenna unit, and is coupled with the second antenna unit and the third antenna unit. A first feed source of the first antenna unit excites the antenna assembly to generate a first resonant mode working at a first frequency band, a second feed source of the second antenna unit excites the antenna assembly to generate a second resonant mode working at the first frequency band, and a main radiation current of the first resonant mode is located at a different radiation branch from that of the second resonant mode. The present application also provides an electronic device. The present application can effectively improve the isolation between the antenna units.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to an antenna assembly and an electronic device having said antenna assembly. Background Technology

[0002] Currently, with the widespread adoption of 5G communication technology, people's communication experience is getting better and better. However, with the increasing popularity of full-screen and curved screens, the clearance space left for antennas is decreasing, which means that in some cases, some antennas on the same frequency have to be placed close together. However, there will be significant interference between antennas on the same frequency. In order to increase the isolation between antennas on the same frequency, it is often necessary to use additional decoupling components or place the antennas on the same frequency at a greater distance, which leads to increased costs or layout difficulties. Summary of the Invention

[0003] This application provides an antenna assembly and an electronic device to solve the above-mentioned problems.

[0004] In a first aspect, an antenna assembly is provided, comprising a first antenna element, a second antenna element, and a third antenna element. The first antenna element includes a first radiating stub, a first matching unit, and a first feed source. The first radiating stub includes a first feed point, which is connected to the first feed source via the first matching unit. The second antenna element includes a second radiating stub, a second matching unit, and a second feed source. The second radiating stub is located on one side of the first radiating stub and coupled to it. The second radiating stub includes a second feed point, which is connected to the second feed source via the second matching unit. The third antenna element includes a third radiating stub located on the side of the first radiating stub opposite to the second radiating stub and coupled to it. The first feed source is used to excite the antenna assembly to generate a first resonant mode operating in a first frequency band, and the second feed source is used to excite the antenna assembly to generate a second resonant mode operating in the first frequency band. The radiating stub where the main radiating current of the first resonant mode is located is different from the radiating stub where the main radiating current of the second resonant mode is located.

[0005] Secondly, an electronic device is also provided, comprising an antenna assembly. The antenna assembly includes a first antenna element, a second antenna element, and a third antenna element. The first antenna element includes a first radiating stub, a first matching unit, and a first feed source. The first radiating stub includes a first feed point, which is connected to the first feed source via the first matching unit. The second antenna element includes a second radiating stub, a second matching unit, and a second feed source. The second radiating stub is located on one side of the first radiating stub and coupled to it. The second radiating stub includes a second feed point, which is connected to the second feed source via the second matching unit. The third antenna element includes a third radiating stub located on the side of the first radiating stub opposite to the second radiating stub and coupled to it. The first feed source is used to excite the antenna assembly to generate a first resonant mode operating in a first frequency band, and the second feed source is used to excite the antenna assembly to generate a second resonant mode operating in the first frequency band. The radiating stub where the main radiating current of the first resonant mode is located is different from the radiating stub where the main radiating current of the second resonant mode is located.

[0006] The electronic device and antenna assembly of this application can effectively increase the isolation of the antenna assembly 1 operating in the first frequency band when the main radiating current of the first resonant mode operated in the first frequency band is located in a different radiating stub than the main radiating current of the second resonant mode operated in the first frequency band generated by the second feed. This effectively reduces the interference between them. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0008] Figure 1 This is a simplified structural diagram of an antenna assembly in one embodiment of this application.

[0009] Figure 2 This is a schematic diagram of the structure and current distribution of a reference antenna assembly.

[0010] Figure 3 This is a schematic diagram of the return loss curve and isolation curve of the reference antenna assembly.

[0011] Figure 4 The diagram shows the overall system efficiency curve and radiation efficiency curve of the reference antenna assembly 1'.

[0012] Figure 5 This is a simplified structural diagram of the antenna assembly and its current distribution in some embodiments of this application.

[0013] Figure 6 This is another simplified structure and current distribution diagram of the antenna assembly in some embodiments of this application.

[0014] Figure 7 This is another simplified structure and current distribution diagram of the antenna assembly in some embodiments of this application.

[0015] Figure 8 This is a schematic diagram of the third matching unit in some embodiments of this application.

[0016] Figure 9 This is a schematic diagram of the return loss curve of the antenna assembly in some embodiments of this application.

[0017] Figure 10 This is a schematic diagram comparing the isolation curves of the antenna assembly in some embodiments of this application with a reference antenna assembly.

[0018] Figure 11 This is a schematic diagram showing the overall system efficiency curve and radiation efficiency curve of the antenna assembly in some embodiments of this application.

[0019] Figure 12 This is a simplified schematic diagram of the antenna assembly and current distribution in some embodiments of this application.

[0020] Figure 13 This is another schematic diagram of the return loss curve of the antenna assembly in some embodiments of this application.

[0021] Figure 14 This is another comparative schematic diagram showing the isolation curves of the antenna assembly in some embodiments of this application and the reference antenna assembly 1'.

[0022] Figure 15 This is a schematic diagram showing the overall system efficiency curve and radiation efficiency curve of the antenna assembly in some embodiments of this application.

[0023] Figure 16 This is a schematic diagram showing other simple structures and current distributions of the antenna assembly in some embodiments of this application.

[0024] Figure 17 This is another schematic diagram of the return loss curve of the antenna assembly in some embodiments of this application.

[0025] Figure 18 This is another schematic diagram comparing the isolation curve parameters of the antenna assembly in some embodiments of this application under various structures with the isolation curve of a reference antenna assembly.

[0026] Figure 19 This is another simplified structural schematic diagram of the antenna assembly in some embodiments of this application.

[0027] Figure 20 This is a plan view of an electronic device in some embodiments of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of the embodiments of this invention, it should be understood that the terms "upper," "lower," "thickness," "width," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not imply or indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The term "connection" in this application includes direct connection, indirect connection, and electrical connection, etc. In the description of the embodiments of this invention, the terms "first," "second," "third," "fourth," etc., are not specific, but are used to distinguish objects with the same name. Where there is a specification, the objects with the same name referred to by the terms "first," "second," "third," "fourth," etc., may be the same object.

[0030] Please see Figure 1 This is a simplified structural diagram of antenna assembly 1 in one embodiment of this application. Figure 1As shown, the antenna assembly 1 includes a first antenna element 11, a second antenna element 12, and a third antenna element 13. The first antenna element 11 includes a first radiating stub 111, a first matching unit M1, and a first feed 112. The first radiating stub 111 includes a first feed point F1, which is connected to the first feed 112 via the first matching unit M1. The second antenna element 12 includes a second radiating stub 121, a second matching unit M2, and a second feed 122. The second radiating stub 121 is located on one side of the first radiating stub 111 and is coupled to it. The second radiating stub 121 includes a second feed point F2, which is connected to the second feed 122 via the second matching unit M2. The third antenna element 13 includes a third radiating stub 131, which is located on the side of the first radiating stub 111 opposite to the second radiating stub 121 and is coupled to it. The first feed source 112 is used to excite the antenna assembly 1 to generate a first resonant mode operating in the first frequency band, and the second feed source 122 is used to excite the antenna assembly 1 to generate a second resonant mode operating in the first frequency band. The radiating branch where the main radiating current of the first resonant mode is located is different from the radiating branch where the main radiating current of the second resonant mode is located.

[0031] Therefore, in this application, the first radiating branch 111 of the first antenna element 11 and the second radiating branch 121 of the second antenna element 12 are arranged adjacently and at intervals. The first feed 112 connected to the first radiating branch 111 and the second feed 122 connected to the second radiating branch 121 both excite the antenna assembly 1 to operate in the first frequency band. However, since the radiating branch where the main radiating current of the first resonant mode operated in the first frequency band generated by the first feed 112 is located is different from the radiating branch where the main radiating current of the second resonant mode operated in the first frequency band generated by the second feed 122 is located, the isolation of the antenna assembly 1 operating in the first resonant mode and the second resonant mode operated in the first frequency band can be effectively increased, and the interference between them can be effectively reduced.

[0032] In this application, the first resonance mode mainly refers to the mode generated by the first feed 112 exciting the antenna assembly 1, and the second resonance mode mainly refers to the mode generated by the second feed 122 exciting the antenna assembly 1. The first resonance mode and the second resonance mode do not specifically refer to a certain mode. Under different circumstances, the first resonance mode may be different, and the second resonance mode may also be different.

[0033] Wherein, the aforementioned second radiating branch 121 is located on one side of the first radiating branch 111 and is coupled to the first radiating branch 111, and the third radiating branch 131 is located on the side of the first radiating branch 111 away from the second radiating branch 121 and is coupled to the first radiating branch 111. This can mean that the first radiating branch 111 is located between the second radiating branch 121 and the third radiating branch 131, and is respectively adjacent to and spaced apart from the second radiating branch 121 and the third radiating branch 131, and is coupled to the second radiating branch 121 and the third radiating branch 131 respectively.

[0034] In some embodiments, the second radiating stub 121 is located on one side of the first radiating stub 111 and is coupled to the first radiating stub 111, and the third radiating stub 131 is located on the side of the first radiating stub 111 away from the second radiating stub 121 and is coupled to the first radiating stub 111. When the radiating stub where the main radiating current of the first resonant mode is located is different from the radiating stub where the main radiating current of the second resonant mode is located, a small amount of radiating current will be coupled to an adjacent stub, thus enabling it to work well in the first frequency band.

[0035] In some embodiments, the main radiating current of the first resonant mode is located in the third radiating branch 131, and the main radiating current of the second resonant mode is located in the first radiating branch 111; or, the main radiating current of the first resonant mode is located in the first radiating branch 111, and the main radiating current of the second resonant mode is located in the second radiating branch 121; or, the main radiating current of the first resonant mode is located in the third radiating branch 131, and the main radiating current of the second resonant mode is located in the second radiating branch 121.

[0036] That is, in some embodiments, when the first feed 112 excites the antenna assembly 1 to generate a first resonant mode operating in the first frequency band, the main radiated current is located in the third radiating stub 131, while when the second feed 122 excites the antenna assembly 1 to generate a second resonant mode operating in the first frequency band, the main radiated current can be located in either the first radiating stub 111 or the second radiating stub 121. Alternatively, when the first feed 112 excites the antenna assembly 1 to generate a first resonant mode operating in the first frequency band, the main radiated current is located in the first radiating stub 111, and when the second feed 122 excites the antenna assembly 1 to generate a second resonant mode operating in the first frequency band, the main radiated current is located in the second radiating stub 121.

[0037] Among them, such as Figure 1As shown, the first radiating branch 111 includes a first end P1 and a second end P2, the second radiating branch 121 includes a third end P3 and a fourth end P4, and the third radiating branch 131 includes a fifth end P5 and a sixth end P6. The first end P1 and the second end P2 of the first radiating branch 111 are adjacent to and spaced apart from the third end P3 of the second radiating branch 121 and the fifth end P5 of the third radiating branch 131, respectively. The first end P1, the second end P2 of the first radiating branch 111, the third end P3 of the second radiating branch 121, and the fifth end P5 of the third radiating branch 131 are all open circuit ends. The first radiating branch 111 also includes a first grounding point G1, which is located between the first feed point F1 and the first end P1 and is used for grounding. The main radiated current of the antenna assembly 1 operating in the first resonant mode of the first frequency band is located in the first branch portion Z1 between the preset connection point F3 of the third radiating branch 131 and the fifth terminal P5. The main radiated current of the antenna assembly 1 operating in the second resonant mode of the first frequency band is located in the second branch portion Z2 between the first ground point G1 of the first radiating branch 111 and the first terminal P1. Alternatively, the main radiated current of the antenna assembly 1 operating in the first resonant mode of the first frequency band is located in the third branch portion Z3 between the first feed point F1 and the second terminal P2 of the first radiating branch 111. The main radiated current of the antenna assembly 1 operating in the second resonant mode of the first frequency band is located in the fourth branch portion Z4 between the second feed point F2 and the third terminal P3 of the second radiating branch 121. Alternatively, the main radiated current of the antenna assembly 1 operating in the first resonant mode of the first frequency band is located in the first branch portion Z1 between the preset connection point F3 of the third radiating branch 131 and the fifth terminal P5, and the main radiated current of the antenna assembly 1 operating in the second resonant mode of the first frequency band is located in the fourth branch portion Z4 between the second feed point F2 of the second radiating branch 121 and the third terminal P3.

[0038] That is, in some embodiments, when the first feed 112 excites the antenna assembly 1 to generate a first resonant mode operating in the first frequency band, the main radiated current is located in the third radiating stub 131, specifically the first stub portion Z1 located between the preset connection point F3 and the fifth terminal P5 of the third radiating stub 131; when the first feed 112 excites the antenna assembly 1 to generate a first resonant mode operating in the first frequency band, the main radiated current is located in the first radiating stub 111, specifically the third stub portion Z3 located between the first feed point F1 and the second terminal P2 of the first radiating stub 111. When the second feed source 122 excites the antenna assembly 1 to generate a second resonant mode operating in the first frequency band, the main radiated current is located in the first radiating branch 111, specifically the second branch portion Z2 located between the first grounding point G1 and the first terminal P1 of the first radiating branch 111; when the second feed source 122 excites the antenna assembly 1 to generate a second resonant mode operating in the first frequency band, the main radiated current is located in the second radiating branch 121, specifically the fourth branch portion Z4 located between the second feed point F2 and the third terminal P3 of the second radiating branch 121.

[0039] Therefore, in this application, through the above-described method, the main radiated current when the first feed source 112 excites the antenna assembly 1 to operate in the first resonant mode of the first frequency band and the main radiated current when the second feed source 122 excites the antenna assembly 1 to operate in the second resonant mode of the first frequency band are located in different radiating branches. Since the radiating branch where the main radiated current is located is often the main radiating branch, radiating the main energy, the antenna assembly 1, when operating in the first frequency band under the excitation of the first feed source 112 and the second feed source 122, radiates the main energy through different radiating branches. This enables the antenna assembly 1 to simultaneously support the transmission and reception of two electromagnetic wave signals in the same frequency band, effectively avoids interference between them, and effectively improves isolation.

[0040] In this application, the first resonant mode or the second resonant mode of the antenna assembly 1 operating in the first frequency band, and the first resonant mode or the second resonant mode of the antenna assembly 1, both refer to the first resonant mode or the second resonant mode of the antenna assembly 1 operating in the first frequency band.

[0041] Please see Figure 2 This is a schematic diagram of the structure and current distribution of a reference antenna assembly 1'. Wherein, as... Figure 2 As shown, the structure of the reference antenna assembly 1' is similar to that of this application. Figure 1 The antenna assembly 1 shown has a roughly the same structure.

[0042] like Figure 2As shown, the reference antenna assembly 1' includes three antenna elements 11', 12', and 13'. Antenna element 11' includes a radiating stub 111', a matching unit M1', and a feed 112'. The radiating stub 111' includes a feed point F1', which is connected to the feed 112' via the matching unit M1'. Antenna element 12' includes a radiating stub 121', a matching unit M2', and a feed 122'. The radiating stub 121' includes a feed point F2', which is connected to the feed 122' via the matching unit M2'. Antenna element 13' includes a radiating stub 131', a matching unit M3', and a feed 132'. The radiating stub 131' includes a feed point F3', which is connected to the feed 132' via the matching unit M3'. Figure 2 As shown, the radial branch 111' is located between the radial branches 121' and 131', and is adjacent to and spaced apart from both the radial branches 121' and 131'.

[0043] Among them, such as Figure 2 As shown, the radiating stub 111 of the reference antenna assembly 1' includes two opposing ends P1' and P2', the radiating stub 121' includes two opposing ends P3' and P4', and the radiating stub 131' includes two opposing ends P5' and P6'. The two ends P1' and P2' of the radiating stub 111' are respectively adjacent to and spaced apart from the ends P3' of the radiating stub 121' and P5' of the radiating stub 131'. The two ends P1' and P2' of the radiating stub 111' are open circuit ends, respectively, as are the ends P3' of the radiating stub 121' and P5' of the radiating stub 131'. The radiating stub 111' also includes a grounding point G1', which is located between the feed point F1' and the end P1' and is used for grounding.

[0044] In the reference antenna assembly 1', the portion between the feed point F1' and the terminal P2' of the radiating stub 111 has an electrical length of λ1 / 4 under the matching of the matching unit M1', where λ1 is the wavelength corresponding to the first frequency band. Therefore, the portion between the feed point F1' and the terminal P2' of the radiating stub 111 supports the transmission and reception of electromagnetic wave signals in the first frequency band under the excitation of the feed source 112'. Thus, in the reference antenna assembly 1', the reference antenna assembly 1' operates in the first resonant mode of the first frequency band, mainly through the resonance of the portion between the feed point F1' and the terminal P2' of the radiating stub 111 in the first frequency band. That is, at this time, the first resonant mode is mainly the mode generated by the antenna unit 11', and mainly the quarter-wavelength mode of the feed point F1' and the terminal P2' of the radiating stub 111. At this time, as... Figure 2 As shown, the radiated current i11' when the reference antenna assembly 1' operates in the first resonant mode of the first frequency band is mainly located between the feed point F1' of the radiating stub 111 and the terminal P2'.

[0045] In the reference antenna assembly 1', the electrical length of the portion between the ground point G1' and the end P1' of the radiating stub 111' is λ1 / 4. Since the end P1' of the radiating stub 111' is adjacent to and spaced apart from the end P3' of the radiating stub 121', the radiating stub 121' of the antenna element 12', under the excitation of the feed source 122', will couple and excite the portion between the ground point G1' and the end P1' of the radiating stub 111' to resonate in the first frequency band. At this time, the reference antenna assembly 1' operates in the second resonant mode of the first frequency band, mainly achieved through the partial resonance between the ground point G1' and the end P1' of the radiating stub 111 in the first frequency band. Furthermore, the first resonant mode is mainly the mode generated by the antenna element 12', and is primarily a balanced mode composed of the portion between the feed point F2 of the radiating stub 121' and the ground point G1' of the radiating stub 111'. That is, the main mode at this time is the quarter-wavelength mode of the portion between the ground point G1' of the radiating stub 111' and the terminal P1', and there is a small amount of reverse current between the feed point F2' of the radiating stub 121' and the terminal P3'. Figure 2 As shown, when the reference antenna assembly 1' operates in the second resonant mode of the first frequency band, the main radiated current i21' is mainly located between the grounding point G1' of the radiating stub 111' and the terminal P1', while only a small portion of the radiated current i22' is distributed between the feed point F2' of the radiating stub 121' and the terminal P3', and is opposite to the main radiated current i21'.

[0046] Therefore, in the reference antenna assembly 1', the main radiated currents of the reference antenna assembly 1' when operating in the first resonant mode and the second resonant mode of the first frequency band are both distributed in the same radiating stub 111, resulting in poor isolation between the first resonant mode and the second resonant mode.

[0047] Please see Figure 3 This is a schematic diagram showing the return loss curve and isolation curve of the reference antenna assembly 1'. Figure 3 It can be used as Figure 2 The return loss curves and the isolation curves between the reference antenna assembly 1' shown are obtained from simulation tests when the reference antenna assembly 1' operates in the first resonant mode and the second resonant mode of the first frequency band.

[0048] in, Figure 3 The diagram illustrates the return loss curve S11-1' when the reference antenna assembly 1' operates in the first resonant mode of the first frequency band, the return loss curve S11-2' when the reference antenna assembly 1' operates in the second resonant mode of the first frequency band, and the isolation curve Sg1' between the first resonant mode and the second resonant mode.

[0049] Generally, the trough of the return loss curve corresponds to the resonant frequency of the operating frequency band. Typically, a higher amplitude corresponding to the isolation curve Sg1' indicates lower isolation between the first and second resonant modes, and greater interference between them; conversely, a lower amplitude corresponding to the isolation curve Sg1' indicates higher isolation between the first and second resonant modes, and less interference between them.

[0050] like Figure 3 As shown, at the resonant frequency of the first frequency band, the return loss corresponding to the first resonant mode is approximately -23dB, while the return loss corresponding to the second resonant mode is approximately -18dB, and the isolation between the first resonant mode and the second resonant mode is -6dB.

[0051] This shows that, Figure 2 In the structure and mode of the reference antenna assembly 1' shown, although the return loss of the reference antenna assembly 1' when it operates in the first resonant mode and the second resonant mode of the first frequency band is relatively low, the isolation value between the first resonant mode and the second resonant mode reaches -6dB, which is a relatively high value. Therefore, the isolation between them is relatively low, which can easily cause mutual interference.

[0052] Please see Figure 4The diagram shows the overall system efficiency curve and radiation efficiency curve of the reference antenna assembly 1'. Figure 4 It can also be used as Figure 2 The system overall efficiency curve and radiation efficiency curve of the reference antenna assembly 1' shown are obtained from simulation tests when the reference antenna assembly 1' operates simultaneously in the first resonant mode and the second resonant mode of the first frequency band.

[0053] in, Figure 4 The diagram illustrates the system overall efficiency curve St1' and radiation efficiency curve Sr1' of the reference antenna assembly 1' operating in the first resonant mode of the first frequency band, and the system overall efficiency curve St2' and radiation efficiency curve Sr2' of the reference antenna assembly 1' operating in the second resonant mode of the first frequency band.

[0054] Generally speaking, the trough of the return loss curve is also the peak of the system's overall efficiency curve and radiation efficiency curve, and the corresponding frequency is the resonant frequency of the operating frequency band.

[0055] like Figure 4 As shown, at the resonant frequency of the first frequency band, the overall system efficiency of the reference antenna assembly 1' operating in the first resonant mode of the first frequency band is approximately -2.5dB, and the radiation efficiency is also approximately -2.5dB. The overall system efficiency of the reference antenna assembly 1' operating in the second resonant mode of the first frequency band is approximately -3.5dB, and the radiation efficiency is also approximately -3.5dB.

[0056] Overall, the system's total efficiency and radiation efficiency are reasonably good, but as previously mentioned... Figure 3 As shown, the isolation value between the first resonant mode and the second resonant mode reaches -6dB, which is a relatively high value. Therefore, the isolation between them is relatively low, which makes them prone to interference.

[0057] In some embodiments, such as Figures 3-4 As shown, the first frequency band in this application may be the N78 band (3.4-3.6GHz), with the resonant frequency approximately in the range of 3.5GHz.

[0058] Obviously, Figures 3-4 This is just one example using the N78 band; the first band can be any other band.

[0059] Please refer to the following: Figure 1 and Figure 5 , Figure 5 This is a simplified structural diagram and current distribution diagram of antenna assembly 1 in some embodiments of this application. Wherein, Figure 5 The structure shown can be compared with Figure 1 Generally the same, in some embodiments, such as Figure 1 and Figure 5 As shown, the antenna assembly 1, such as the third antenna unit 13, further includes a third matching unit M1. The third matching unit M1 is connected between the preset connection point F3 of the third radiating stub 131 and ground, and is used for matching adjustment of the first frequency band. The electrical length of the first stub portion Z1 between the preset connection point F3 of the third radiating stub 131 and the fifth terminal P5 under the matching of the third matching unit M1 is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The first feed 112 excites the first radiating stub 111 and couples the excitation of the first stub portion Z1 through the first radiating stub 111 to operate in the first frequency band, so that when the first feed 112 excites the antenna assembly 1 to generate the first resonant mode operating in the first frequency band, the main radiating current i11 is located in the first stub portion Z1.

[0060] That is, in some embodiments, the electrical length of the first stub portion Z1 between the third feed point F3 of the third radiating stub 131 and the fifth terminal P5 under the matching of the third matching unit is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. In this case, the first stub portion Z1 can resonate well in the first frequency band, and the first radiating stub 111 of the first antenna element 11, under the excitation of the first feed 112, will couple and excite the first stub portion Z1 of the third radiating stub 131 to resonate in the first frequency band. This causes the main radiating current when the first feed 112 excites the antenna assembly 1 to generate the first resonant mode operating in the first frequency band to be located in the first stub portion Z1.

[0061] like Figure 5 As shown, further, the first resonant mode operating in the first frequency band generated by the antenna assembly 1 can be a loop mode from the first feed point F1 of the first radiating stub 111 to the preset connection point F3 of the third radiating stub 131, and through the second sub-matching unit M32 of the third matching unit M1 to ground. At this time, the dominant mode is the quarter-wavelength mode of the first stub portion Z1 between the preset connection point F3 of the third radiating stub 131 and the fifth terminal P5, and there is a small amount of current i12 in the same direction between the first feed point F1 of the first radiating stub 111 and the second terminal P2. Therefore, the main radiating current i11 when the first feed source 112 excites the antenna assembly 1 to generate the first resonant mode operating in the first frequency band is located in the first stub portion Z1.

[0062] Please see Figure 6 For some embodiments of this application Figure 1 The diagram shows another simplified structural schematic and current distribution diagram of antenna assembly 1. Wherein, as shown... Figure 6 As shown, the third antenna unit 13 further includes a fourth matching unit M4 and a third feed 132. The fourth matching unit M4 is connected between the third feed 132 and the preset connection point F3. In some embodiments, the preset connection point F3 is the feed point of the third radiating stub 131, and the fourth matching unit M4 is used to achieve matching adjustment for other frequency bands. The other frequency bands are frequency bands other than the first frequency band.

[0063] When the third antenna unit 13 simultaneously includes the third matching unit M3, the fourth matching unit M4, and the third feed 132, the fourth matching unit M4 allows electromagnetic wave signals of other frequency bands to pass through while blocking electromagnetic wave signals of the first frequency band and other frequency bands from passing through. The third matching unit M3 is used to achieve matching adjustment of the first frequency band, and the third matching unit M3 allows electromagnetic wave signals of the first frequency band to pass through while blocking electromagnetic wave signals of other frequency bands from passing through. That is, the third matching unit M3 and the fourth matching unit M4 form a bandpass filter that allows electromagnetic wave signals of the corresponding frequency band to pass through, so that the electromagnetic wave signals of the first frequency band supported by the antenna assembly 1 will not interfere with other frequency bands supported by the antenna assembly 1.

[0064] In some embodiments, when the third matching unit M3 is used for matching adjustment of the first frequency band, it will to some extent disrupt the resonance condition of the third stub portion Z3 between the first feed point F1 and the second terminal P2 of the first radiating stub 111. That is, as mentioned above, the electrical length of the portion between the feed point F1' and the terminal P2' of the radiating stub 111' of the reference antenna assembly 1' under the matching of the matching unit M1' was originally λ1 / 4. In this application, when the third matching unit M3 is used for matching adjustment of the first frequency band, the electrical length of the portion between the feed point F1' and the terminal P2' of the radiating stub 111' of the reference antenna assembly 1' under the matching of the matching unit M1' will no longer be λ1 / 4, that is, the electrical length of the third stub portion Z3 between the first feed point F1 and the second terminal P2 of the first radiating stub 111 will no longer be λ1 / 4. Therefore, at this time, the antenna assembly 1 mainly operates in the first resonant mode of the first frequency band by coupling and exciting the first stub portion Z1 through the first radiating stub 111, and the main radiating current i11 of the first resonant mode is located in the first stub portion Z1.

[0065] As mentioned above, the main mode at this time is the quarter-wavelength mode of the first branch portion Z1 between the preset connection point F3 of the third radiating branch 131 and the fifth end P5, but there is also a small amount of current i12 in the same direction between the first feed point F1 of the first radiating branch 111 and the second end P2.

[0066] Obviously, in some embodiments, the third antenna element 13 may not include the fourth matching element M4 and the third feed 132, and the third radiating stub 131 of the third antenna element 13 may exist only as a parasitic stub of the first radiating stub 111.

[0067] Please see Figure 7 For some embodiments of this application Figure 1 The diagram shows another simplified structural schematic of antenna assembly 1 and a schematic diagram of its current distribution. (See diagram below.) Figure 7 As shown, the preset connection point F3 of the third radiating stub is directly grounded, and the electrical length of the first stub portion Z1 between the preset connection point F3 and the fifth terminal P5 is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The first feed source 112 excites the first radiating stub 111 and operates in the first frequency band by coupling the excitation of the first stub portion Z1 through the first radiating stub 111, so that the main radiating current i11 of the first resonant mode is located in the first stub portion Z1.

[0068] That is, in some embodiments, the preset connection point F3 of the third radiating stub is directly grounded, and the electrical length of the first stub portion Z1 between the preset connection point F3 and the fifth terminal P5 is λ1 / 4. The first feed source 112 excites the first radiating stub 111 and operates in the first frequency band by coupling the excitation of the first stub portion Z1 through the first radiating stub 111, so that the main radiating current i11 of the first resonant mode is located in the first stub portion Z1.

[0069] Similarly, as mentioned above, the main mode at this time is the quarter-wavelength mode of the first branch portion Z1 between the preset connection point F3 of the third radiating branch 131 and the fifth terminal P5, but there is also a small amount of current i12 in the same direction between the first feed point F1 of the first radiating branch 111 and the second terminal P2.

[0070] in, Figure 7 In the structure shown, the preset connection point F3 is a grounding point, and the third radiating branch 131 can be used only as a parasitic branch of the first radiating branch 111.

[0071] Obviously, in some embodiments, the third radiating stub 131 may also be provided with a feed point and connected to the corresponding feed source at other locations, such as outside the first stub portion Z1, and operate in other frequency bands under the excitation of the corresponding feed source.

[0072] Among them, such as Figures 5-7 As shown, in some embodiments, when the main radiated current i11 of the antenna assembly 1 is located in the first resonant mode of the first frequency band and is located in the first stub portion Z1, the electrical length of the second stub portion Z2 between the first ground point G1 and the first terminal P1 of the first radiating stub 111 is λ1 / 4. The second feed 122 excites the second radiating stub 121 and couples the excitation of the second stub portion Z2 through the second radiating stub 121 to operate at least in the first frequency band. When the antenna assembly 1 is located in the second resonant mode of the first frequency band, the main radiated current i21 is located in the second stub portion Z2.

[0073] That is, in some embodiments, when the main radiated current i11 of the antenna assembly 1 is located in the first stub portion Z1 when it operates in the first resonant mode of the first frequency band, the way in which the antenna assembly 1 operates in the second resonant mode of the first frequency band can be the same as the way in which the aforementioned reference antenna assembly 1' operates in the second resonant mode of the first frequency band. That is, the mode generated at this time is mainly the balanced mode formed between the second feed point F2 of the second radiating stub 121 and the first ground point G1 of the first radiating stub 111. That is, the main mode of the second resonant mode of the antenna assembly 1 operating in the first frequency band at this time is the quarter-wavelength mode of the second stub portion Z2 between the first ground point G1 of the first radiating stub 111 and the first terminal P1, and there is a small amount of reverse current between the second feed point F2 of the second radiating stub 121 and the third terminal P3. That is, as Figures 5-7 As shown, the main radiation current i21 of the antenna assembly 1 operating in the second resonant mode of the first frequency band is mainly located in the second branch portion Z2 between the first grounding point G1 of the first radiation branch 111 and the first end P1, while only a small portion of the radiation current i22 is distributed between the second feed point F2 of the second radiation branch 121 and the third end P3, and is opposite to the main radiation current i21.

[0074] Therefore, in some embodiments, when the main radiation current i11 of the antenna assembly 1 is located in the first branch portion Z1 of the third radiation branch 131 when it is operating in the first resonant mode of the first frequency band, the main radiation current i21 of the antenna assembly 1 is located in the second branch portion Z2 of the first radiation branch 111, thus being located in two independent radiation branches respectively.

[0075] The third matching unit M3 may include any combination of inductors and / or capacitors. For example, the second sub-matching unit M3 may include inductors and capacitors in parallel, or inductors and capacitors in series, or inductors and capacitors in parallel and then in series with an inductor or capacitor, or a parallel structure of two inductors and capacitors followed by a series connection, or a series branch of capacitors and inductors in series and a capacitor or / or inductor in parallel, etc.

[0076] Please see Figure 8 This is a schematic diagram of the second sub-matching unit M32 in some embodiments of this application.

[0077] like Figure 8 As shown, the second sub-matching unit M32 may include a first inductor L11, a first capacitor C11, and a second capacitor C12. The first inductor L11 and the first capacitor C11 are connected in parallel, and then the first inductor L11, the first capacitor C11, and the second capacitor C12 connected in parallel are connected in series between the preset connection point F3 and ground.

[0078] in, Figure 8 As just one example, as mentioned above, the second sub-matching unit M32 may also include inductors and capacitors in parallel, or inductors and capacitors in series, or a structure in which inductors and capacitors are connected in parallel and then connected in series with an inductor or capacitor, or a structure in which a series branch of capacitors and inductors are connected in series and then connected in parallel with a capacitor or / or inductor, and so on.

[0079] Please see Figure 9 This is a schematic diagram of the return loss curve of antenna assembly 1 in some embodiments of this application. Figure 9 It can be used as Figure 5 The return loss curves of the antenna assembly 1 when it operates in the first resonant mode and the second resonant mode of the first frequency band are obtained by simulation test.

[0080] in, Figure 9 The diagram illustrates the return loss curve S11-1 of the first resonant mode of the antenna assembly 1 operating in the first frequency band and the return loss curve S11-2 of the second resonant mode of the antenna assembly 1 operating in the first frequency band.

[0081] As mentioned earlier, generally speaking, the trough of the return loss curve corresponds to the resonant frequency of the operating frequency band.

[0082] like Figure 9As shown, at the resonant frequency of the first frequency band, the return loss of the first antenna element 11 is approximately -22dB, while the return loss of the second antenna element 12 is approximately -14dB. This is essentially the same as the return losses of antenna elements 11' and 12' in the aforementioned reference antenna assembly 1', and there is no significant increase in return loss.

[0083] Please see Figure 10 This is a schematic diagram comparing the isolation curves of antenna assembly 1 and reference antenna assembly 1' in some embodiments of this application.

[0084] in, Figure 10 The diagram illustrates the isolation curve Sg1 of the antenna assembly 1 in some embodiments of this application when it operates in the first resonant mode and the second resonant mode of the first frequency band, and the isolation curve Sg1' of the reference antenna assembly 1 when it operates in the first resonant mode and the second resonant mode of the first frequency band.

[0085] Wherein, the isolation curve Sg1 can be based on Figure 5 The isolation curve between the first resonant mode and the second resonant mode of the antenna assembly 1 operating in the first frequency band is obtained from simulation tests. The isolation curve Sg1' can be... Figure 2 The isolation curve between the first resonant mode and the second resonant mode of the reference antenna assembly 1', obtained by simulation test of the reference antenna assembly 1' shown, is shown.

[0086] As mentioned earlier, generally speaking, the higher the amplitude of the isolation curve, the lower the isolation between the two modes and the greater the interference between them; the lower the amplitude of the isolation curve, the higher the isolation between the two modes and the smaller the interference between them.

[0087] Among them, judging from the isolation curve Sg1' of the first resonant mode and the second resonant mode of the reference antenna assembly 1' operating in the first frequency band, as mentioned above, at the resonant frequency (e.g., Figure 8 At the 3.5 GHz frequency shown, the isolation between the first and second resonant modes of the reference antenna assembly 1' reaches -6 dB. And as... Figure 10 As shown, from the isolation curve Sg1 of the antenna assembly 1 when it operates in the first resonant mode and the second resonant mode in the first frequency band, at the resonant frequency, the isolation value between the first resonant mode and the second resonant mode of the antenna assembly 1 is approximately -11dB, which is reduced by 5dB.

[0088] Therefore, in this application, by making the main radiated current i11 of the antenna assembly 1 when it operates in the first resonant mode of the first frequency band located in the first branch portion Z1 of the third radiating branch 131, and the main radiated current i21 of the antenna assembly 1 when it operates in the second resonant mode of the first frequency band located in the second branch portion Z2 of the first radiating branch 111, compared with the method in which the main radiated current in the reference antenna assembly 1 is all located in the radiating branch 111', the isolation between the two antenna elements 11 can be effectively improved and the interference can be effectively reduced.

[0089] Please see Figure 11 The diagram shows the overall system efficiency curve and radiation efficiency curve of antenna assembly 1 in some embodiments of this application. Figure 11 It can be used as Figure 5 The system overall efficiency curve and radiation efficiency curve of the antenna assembly 1 when it operates in the first resonant mode and the second resonant mode of the first frequency band are obtained from the simulation test.

[0090] in, Figure 11 The diagram illustrates the system overall efficiency curve St1 and radiation efficiency curve Sr1 of the antenna assembly 1 operating in the first resonant mode of the first frequency band, and the system overall efficiency curve St2 and radiation efficiency curve Sr2 of the antenna assembly 1 operating in the second resonant mode of the first frequency band.

[0091] Generally speaking, the trough of the return loss curve is also the peak of the system's overall efficiency curve and radiation efficiency curve, and the corresponding frequency is the resonant frequency of the operating frequency band.

[0092] like Figure 11 As shown, at the resonant frequency of the first frequency band, the overall system efficiency of the antenna assembly 1 operating in the first resonant mode of the first frequency band is approximately -2dB, and the radiation efficiency is also approximately -2dB. The overall system efficiency of the antenna assembly 1 operating in the second resonant mode of the first frequency band is approximately -3.5dB, and the radiation efficiency is also approximately -3.5dB.

[0093] Overall, the system's total efficiency and radiation efficiency are reasonably good, and are basically the same as those of the reference antenna component 1' operating in the first and second resonant modes of the first frequency band. There is no significant reduction in the system's total efficiency and radiation efficiency.

[0094] Therefore, according to Figures 9-11As can be seen from the relevant figures, in this application, by making the main radiated current i11 of the antenna assembly 1 operating in the first resonant mode of the first frequency band located in the first branch portion Z1 of the third radiating branch 131, and the main radiated current i21 of the antenna assembly 1 operating in the second resonant mode of the first frequency band located in the second branch portion Z2 of the first radiating branch 111, compared with the reference antenna assembly 1' operating in the first resonant mode and the second resonant mode of the first frequency band with the main radiated current in the radiating branch 111', the return loss, system overall efficiency, and radiation efficiency are similar, and the isolation between the two resonant modes can be effectively improved, effectively reducing interference, thereby effectively improving antenna performance.

[0095] In some embodiments, such as Figures 9-11 As shown, the first frequency band in this application may be the N78 band (3.4-3.6GHz), with the resonant frequency approximately in the range of 3.5GHz.

[0096] Obviously, the same, Figures 9-11 This is just one example using the N78 band; the first band can be any other band.

[0097] Please see Figure 12 This is a simplified structural diagram of the antenna assembly 1 and its current distribution in some embodiments of this application.

[0098] In some embodiments, the electrical length of the fourth stub portion Z4 between the second feed point F2 of the second radiating stub 121 and the third terminal P3 under the matching of the second matching unit M2 is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The second feed source 122 excites the fourth stub portion Z4 of the second radiating stub 121 to operate in the first frequency band, and the main radiating current of the antenna assembly 1 in the second resonant mode of the first frequency band is located in the fourth stub portion Z4.

[0099] That is, in some embodiments, by designing the electrical length of the fourth stub portion Z4 between the second feed point F2 of the second radiating stub 121 and the third terminal P3 to be λ1 / 4 under the matching of the second matching unit M2, the fourth stub portion Z4 can support the transmission and reception of electromagnetic wave signals in the first frequency band under the excitation of the second feed source 122. As the main radiating stub, the main radiating current of the antenna assembly 1 when operating in the second resonant mode of the first frequency band is located in the fourth stub portion Z4.

[0100] In some embodiments, the position of the first grounding point G1 can be moved relative to the reference antenna assembly 1', for example, by moving the first grounding point G1 further away from the first end P1. This disrupts the resonance condition of the second stub portion Z2 between the first grounding point G1 and the first end P1, meaning the electrical length of the second stub portion Z2 between the first grounding point G1 and the first end P1 is no longer λ1 / 4. Consequently, the second stub portion Z2 between the first grounding point G1 and the first end P1 is no longer the main radiating stub, and the fourth stub portion Z4 between the second feed point F2 of the second radiating stub 121 and the third end P3 becomes the main radiating stub for transmitting and receiving electromagnetic wave signals in the first frequency band. This ensures that the main radiating current i21 of the second antenna element 12 operating in the first frequency band is located in the fourth stub portion Z4.

[0101] In particular, such as Figure 12 As shown, the second resonant mode of the antenna assembly 1 operating in the first frequency band can be a loop mode from the second feed point F2 of the second radiating stub 112 to the first ground point G1 and then to ground. At this time, since the electrical length of the fourth stub portion Z4 between the second feed point F2 of the second radiating stub 121 and the third terminal P3 is λ1 / 4 under the matching of the second matching unit M2, the main mode is a quarter-wavelength mode of the fourth stub portion Z4 between the second feed point F2 of the second radiating stub 121 and the third terminal P3. There is a small amount of current i22 in the same direction between the second stub portion Z2 between the first ground point G1 and the first terminal P1. Therefore, the main radiating current i21 of the second resonant mode of the antenna assembly 1 operating in the first frequency band is located in the fourth stub portion Z4.

[0102] In some embodiments, when the electrical length of the fourth stub portion Z4 between the second feed point F2 and the third terminal P3 of the second radiating stub 121 is λ1 / 4 under the matching of the second matching unit M2, the second feed source 122 excites the fourth stub portion Z4 of the second radiating stub 121 to operate at least in the first frequency band, and the main radiating current of the second antenna element 12 operating in the first frequency band is located in the fourth stub portion Z4, the electrical length of the third stub portion Z3 between the first feed point F1 and the second terminal P2 of the first radiating stub 111 is λ1 / 4 under the matching of the first matching unit M1, the first feed source 112 excites the third stub portion Z3 of the first radiating stub 111 to operate in the first frequency band, and the main radiating current of the first resonant mode of the antenna assembly 1 operating in the first frequency band is located in the third stub portion Z3.

[0103] That is, in some embodiments, when the main radiating current of the second resonant mode of the antenna assembly 1 operating in the first frequency band is located at the fourth stub portion Z4 of the second radiating stub 121, the manner in which the antenna assembly 1 operates in the first resonant mode of the first frequency band can be the same as the manner in which the aforementioned reference antenna assembly 1' operates in the first resonant mode of the first frequency band. That is, the first resonant mode of the antenna assembly 1 operating in the first frequency band is mainly resonant in the first frequency band through the third stub portion Z3 between the first feed point F1 of the first radiating stub 111 and the second terminal P2. In other words, at this time, the first resonant mode of the antenna assembly 1 operating in the first frequency band is mainly a quarter-wavelength mode between the first feed point F1 of the first radiating stub 111 and the second terminal P2. At this time, as... Figure 12 As shown, the main radiated current i11 of the antenna assembly 1 operating in the first resonant mode of the first frequency band is mainly located in the third stub portion Z3 between the feed point F1 of the first radiating stub 111 and the second terminal P2.

[0104] Therefore, in some embodiments, when the main radiating current of the antenna assembly 1 operating in the second resonant mode of the first frequency band is located in the fourth branch portion Z4 of the second radiating branch 121, the main radiating current i11 of the antenna assembly 1 operating in the first resonant mode of the first frequency band is located in the third branch portion Z3 between the feed point F1 of the first radiating branch 111 and the second terminal P2, so that it can still be located in two independent radiating branches respectively.

[0105] In some embodiments, when the main radiating current of the antenna assembly 1 operating in the second resonant mode of the first frequency band is located in the fourth branch portion Z4 of the second radiating branch 121, and the main radiating current i11 of the antenna assembly 1 operating in the first resonant mode of the first frequency band is located in the third branch portion Z3 between the feed point F1 of the first radiating branch 111 and the second terminal P2, the third matching circuit M3 may be omitted, and the preset connection point F3 may not be grounded. For example, as... Figure 12 As shown, the third antenna unit 13 may include the fourth matching unit M4 and the third feed 132. The preset connection point F3 may be connected to the third feed 132 only through the fourth matching unit M4. The antenna assembly 1 may operate in other frequency bands under the excitation of the third feed 132.

[0106] In order to illustrate the current more clearly, Figure 12 Some component designations have been omitted; for more detailed illustrations, please refer to the aforementioned diagrams. Figure 1 or Figure 5 Figures, etc.

[0107] Please see Figure 13This is a schematic diagram of another return loss curve for antenna assembly 1 in some embodiments of this application. Figure 13 It can be used as Figure 12 The return loss curves of the antenna assembly 1 operating in the first resonant mode and the second resonant mode in the first frequency band are obtained from the simulation test.

[0108] in, Figure 13 The diagram illustrates the return loss curve S11-3 of the first resonant mode of the antenna assembly 1 operating in the first frequency band and the return loss curve S11-4 of the second resonant mode of the antenna assembly 1 operating in the first frequency band.

[0109] As mentioned earlier, generally speaking, the trough of the return loss curve corresponds to the resonant frequency of the operating frequency band.

[0110] like Figure 13 As shown, at the resonant frequency of the first frequency band, the return loss of the antenna assembly 1 operating in the first resonant mode of the first frequency band is approximately -19 dB, while the return loss of the antenna assembly 1 operating in the second resonant mode of the first frequency band is approximately -8 dB. Compared with the return loss of the aforementioned reference antenna assembly 1' operating in the first and second resonant modes of the first frequency band, there is no particularly significant increase.

[0111] Please see Figure 14 This is another comparative schematic diagram of the isolation curves of antenna assembly 1 and reference antenna assembly 1' in some embodiments of this application.

[0112] in, Figure 14 The diagram illustrates the isolation curve Sg2 of the first resonant mode and the second resonant mode of the antenna assembly 1 operating in the first frequency band in some embodiments of this application, and the isolation curve Sg1' of the reference antenna assembly 1' operating in the first resonant mode and the second resonant mode in the first frequency band.

[0113] Wherein, the isolation curve Sg2 can be based on Figure 12 The isolation curve between the first resonant mode and the second resonant mode of the antenna assembly 1 shown is obtained from simulation tests. The isolation curve Sg1' can be... Figure 2 The isolation curve between the first resonant mode and the second resonant mode of the reference antenna assembly 1' operating in the first frequency band is obtained from the simulation test shown.

[0114] As mentioned earlier, generally speaking, the higher the amplitude corresponding to the isolation curve, the lower the isolation between the two resonant modes and the greater the interference between them. The lower the amplitude corresponding to the isolation curve, the higher the isolation between the two resonant modes and the smaller the interference between them.

[0115] Among them, judging from the isolation curve Sg1' of the first resonant mode and the second resonant mode of the reference antenna assembly 1' operating in the first frequency band, as mentioned above, at the resonant frequency (e.g., Figure 14 At the 3.5 GHz frequency shown, the isolation value between the first resonant mode and the second resonant mode of the reference antenna assembly 1' operating in the first frequency band reaches -6 dB. And as shown... Figure 14 As shown, from the isolation curve Sg1 of the first resonant mode and the second resonant mode of the antenna assembly 1 operating in the first frequency band, at the resonant frequency, the isolation value between the first resonant mode and the second resonant mode of the antenna assembly 1 operating in the first frequency band is approximately -15dB, which is reduced by 9dB.

[0116] Therefore, in this application, by having the main radiated current i11 of the first resonant mode of the antenna assembly 1 operating in the first frequency band located in the third stub portion Z3 between the feed point F1 of the first radiating stub 111 and the second terminal P2, and by having the main radiated current of the second resonant mode of the antenna assembly 1 operating in the first frequency band located in the fourth stub portion Z4 of the second radiating stub 121, compared to the method in which the main radiated currents of the two resonant modes of the reference antenna assembly 1' are both located in the radiating stub 111', the isolation between the two resonant modes can be effectively improved, and interference can be effectively reduced.

[0117] Please see Figure 15 The diagram shows the overall system efficiency curve and radiation efficiency curve of antenna assembly 1 in some embodiments of this application. Figure 15 It can be used as Figure 12 The system overall efficiency curve and radiation efficiency curve of the antenna assembly 1 operating in the first resonant mode and the second resonant mode in the first frequency band are obtained from the simulation test of the antenna assembly 1 shown.

[0118] in, Figure 15 The diagram illustrates the system overall efficiency curve St3 and radiation efficiency curve Sr3 of the antenna assembly 1 operating in the first resonant mode of the first frequency band, and the system overall efficiency curve St4 and radiation efficiency curve Sr4 of the antenna assembly 1 operating in the second resonant mode of the first frequency band.

[0119] Generally speaking, the trough of the return loss curve is also the peak of the system's overall efficiency curve and radiation efficiency curve, and the corresponding frequency is the resonant frequency of the operating frequency band.

[0120] like Figure 15 As shown, at the resonant frequency of the first frequency band, the overall system efficiency of the antenna assembly 1 operating in the first resonant mode of the first frequency band is approximately -2dB, and the radiation efficiency is also approximately -2dB. The overall system efficiency of the antenna assembly 1 operating in the second resonant mode of the first frequency band is approximately -3.5dB, and the radiation efficiency is approximately -3dB.

[0121] Overall, the system's total efficiency and radiation efficiency are reasonably good, and are basically the same as those of the reference antenna component 1' operating in the first and second resonant modes of the first frequency band. There is no significant reduction in the system's total efficiency and radiation efficiency.

[0122] Therefore, according to Figures 13-15 As can be seen from the relevant figures, in this application, by having the main radiated current i11 of the first resonant mode of the antenna assembly 1 operating in the first frequency band located in the third stub portion Z3 between the feed point F1 of the first radiating stub 111 and the second terminal P2, and by having the main radiated current of the second resonant mode of the antenna assembly 1 operating in the first frequency band located in the fourth stub portion Z4 of the second radiating stub 121, compared to the reference antenna assembly 1 where the main radiated current is all located in the radiating stub 111', the return loss, overall system efficiency, and radiation efficiency are almost the same, and the isolation between the two resonant modes can be effectively improved, effectively reducing interference, thereby effectively improving antenna performance.

[0123] In some embodiments, such as Figures 11-13 As shown, the first frequency band in this application may be the N78 band (3.4-3.6GHz), with the resonant frequency approximately in the range of 3.5GHz.

[0124] Obviously, the same, Figures 13-15 This is just one example using the N78 band; the first band can be any other band.

[0125] Please see Figure 16 The diagram shows other simple structures and current distributions of antenna assembly 1 in some embodiments of this application.

[0126] In some embodiments, the antenna assembly 1 may include the third matching unit M3 for matching adjustment of the first frequency band. The electrical length of the first stub portion Z1 between the preset connection point F3 of the third radiating stub 131 and the fifth terminal P5 under the matching of the third matching unit M3 is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The first feed 112 excites the first radiating stub 111 and couples the excitation of the first stub portion Z1 through the first radiating stub 111 to operate at least in the first frequency band. Figure 16 As shown, the main radiated current i11 of the antenna assembly 1 operating in the first resonant mode of the first frequency band is located in the first stub portion Z1.

[0127] That is, in some embodiments, the third matching unit M3 is also used for matching adjustment of the first frequency band. The electrical length of the first stub portion Z1 between the third feed point F3 of the third radiating stub 131 and the fifth terminal P5 under the matching of the third matching unit M3 is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. At this time, the first stub portion Z1 can resonate well in the first frequency band. Under the excitation of the first feed source 112, the first radiating stub 111 of the first antenna element 11 will couple and excite the first stub portion Z1 of the third radiating stub 131 to resonate in the first frequency band. Thus, the main radiating current of the first resonant mode of the antenna assembly 1 operating in the first frequency band is located in the first stub portion Z1.

[0128] like Figure 16 As shown, further, the first resonant mode of the antenna assembly 1 operating in the first frequency band can be a loop mode from the first feed point F1 of the first radiating stub 111 to the preset connection point F3 of the third radiating stub 131 and through the third matching unit M3 to ground. In this case, the first resonant mode of the antenna assembly 1 operating in the first frequency band is mainly a quarter-wavelength mode of the first stub portion Z1 between the preset connection point F3 of the third radiating stub 131 and the fifth terminal P5, and there is a small amount of current i12 in the same direction between the first feed point F1 of the first radiating stub 111 and the second terminal P2. Therefore, the main radiated current i11 of the first resonant mode of the antenna assembly 1 operating in the first frequency band is located in the first stub portion Z1.

[0129] Among them, such as Figure 16As shown, in some embodiments, when the antenna assembly 1 operates in the first resonant mode of the first frequency band, the electrical length of the fourth stub portion Z4 between the second feed point F2 of the second radiating stub 121 and the third terminal P3 under the matching of the second matching unit M2 is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The second feed source 122 excites the fourth stub portion Z4 of the second radiating stub 121 to operate at least in the first frequency band, and the main radiating current of the antenna assembly 1 operating in the second resonant mode of the first frequency band is located in the fourth stub portion Z4.

[0130] That is, in some embodiments, the main radiated current i11 of the antenna assembly 1 operating in the first resonant mode of the first frequency band is located in the first branch portion Z1 of the third radiating branch 131, and the main radiated current i21 of the antenna assembly 1 operating in the second resonant mode of the first frequency band is located in the fourth branch portion Z4 of the second radiating branch 121.

[0131] To elaborate further, Figure 16 In the antenna assembly 1 shown, relative to the reference antenna assembly 1', simultaneous... Figure 5 The improvements shown and Figure 12 The improvements shown.

[0132] More detailed information regarding the operation of the antenna assembly 1 in the first resonant mode of the first frequency band can be found in the foregoing. Figure 5 For more details regarding the main radiating current of the antenna assembly 1 operating in the second resonant mode of the first frequency band, located in the fourth branch portion Z4 of the second radiating branch 121, please refer to the aforementioned information. Figure 12 Related content.

[0133] The antenna assembly 1 can also operate in the first resonant mode of the first frequency band in the manner described above. Figure 7 In this way, the preset connection point F3 is directly grounded without the need for the third matching unit M3, which also allows the main radiation current i11 of the antenna assembly 1 operating in the first resonant mode of the first frequency band to be located in the first branch part Z1 of the third radiation branch 131.

[0134] In order to illustrate the current more clearly, Figure 16 Some component designations have also been omitted; for more detailed illustrations, please refer to the aforementioned diagrams. Figure 1 or Figure 5 .

[0135] Please see Figure 17 This is another schematic diagram of the return loss curve of antenna assembly 1 in some embodiments of this application. Figure 17 It can be used as Figure 16The return loss curves of the antenna assembly 1 operating in the first resonant mode and the second resonant mode in the first frequency band are obtained from the simulation test.

[0136] in, Figure 17 The diagram illustrates the return loss curve S11-5 of the first resonant mode of the antenna assembly 1 operating in the first frequency band and the return loss curve S11-6 of the second resonant mode of the antenna assembly 1 operating in the first frequency band.

[0137] As mentioned earlier, generally speaking, the trough of the return loss curve corresponds to the resonant frequency of the operating frequency band.

[0138] like Figure 17 As shown, at the resonant frequency of the first frequency band, the return loss of the antenna assembly 1 operating in the first resonant mode of the first frequency band is approximately -9.5 dB, while the return loss of the antenna assembly 1 operating in the second resonant mode of the first frequency band is approximately -6 dB. Compared with the return loss of the aforementioned reference antenna assembly 1' operating in the first and second resonant modes of the first frequency band, there is no particularly significant increase.

[0139] Please see Figure 18 This is another schematic diagram comparing the isolation curve parameters of antenna assembly 1 under various structures in some embodiments of this application with the isolation curve of reference antenna assembly 1'.

[0140] in, Figure 18 The diagram illustrates the isolation curves Sg1, Sg2, and Sg3 of the antenna assembly 1 in various structures operating in the first resonant mode and the second resonant mode in the first frequency band, as well as the isolation curve Sg1' of the reference antenna assembly 1' operating in the first resonant mode and the second resonant mode in the first frequency band.

[0141] Wherein, the isolation curve Sg1 can be based on Figure 5 The isolation curve Sg2, obtained from simulation testing of the antenna assembly 1 shown, is the distance between the first resonant mode and the second resonant mode of the antenna assembly 1 operating in the first frequency band. The isolation curve Sg2 can be defined as follows: Figure 12 The isolation curve Sg3, obtained from simulation testing of the antenna assembly 1 shown, is the distance between the first resonant mode and the second resonant mode of the antenna assembly 1 operating in the first frequency band. The isolation curve Sg3 can be... Figure 16 The isolation curve Sg1' obtained from simulation testing of the antenna assembly 1 shown is the distance between the first resonant mode and the second resonant mode of the antenna assembly 1 operating in the first frequency band. The isolation curve Sg1' can be... Figure 2The isolation curves between the reference antenna assembly 1' and the reference antenna assembly 1' when operating in the first resonant mode and the second resonant mode of the first frequency band are obtained from the simulation test.

[0142] As mentioned earlier, generally speaking, the higher the amplitude corresponding to the isolation curve, the lower the isolation between the two resonant modes and the greater the interference between them. The lower the amplitude corresponding to the isolation curve, the higher the isolation between the two resonant modes and the smaller the interference between them.

[0143] Among them, judging from the isolation curve Sg1' of the first resonant mode and the second resonant mode of the reference antenna assembly 1' operating in the first frequency band, as mentioned above, at the resonant frequency (e.g., Figure 8 At the 3.5 GHz frequency shown, the isolation between the first and second resonant modes of the reference antenna assembly 1' reaches -6 dB. And as... Figure 18 As shown, and as mentioned before, Figure 5 The antenna assembly 1 shown operates with an isolation value of approximately -11 dB between the first and second resonant modes in the first frequency band, a reduction of 6 dB. Figure 12 The antenna assembly 1 shown operates with an isolation value of approximately -15dB between the first and second resonant modes in the first frequency band, a reduction of 9dB. Figure 16 The isolation value between the first resonant mode and the second resonant mode of the antenna assembly 1 shown is approximately -19.6dB, which is a reduction of 13.6dB.

[0144] Therefore, in this application, by having the main radiated current i11 of the first resonant mode of the antenna assembly 1 operating in the first frequency band located in the first branch portion Z1 of the third radiating branch 131, and the main radiated current of the second resonant mode of the antenna assembly 1 operating in the first frequency band located in the fourth branch portion Z4 of the second radiating branch 121, compared to the method in which the main radiated current of the reference antenna assembly 1' is all located in the radiating branch 111', the isolation between the two resonant modes can be effectively improved. Compared to the aforementioned... Figure 5 and Figure 12 This approach can further improve the isolation between the two resonant modes, thereby further reducing interference.

[0145] Among them, such as Figure 5 , Figure 12 as well as Figure 16 As shown in the figure, the first radiating branch 111 also includes a second grounding point G2, which is located between the first feed point F1 and the first grounding point G1.

[0146] In some embodiments, the second grounding point G2 can be used as the grounding location for antennas in certain frequency bands. For example, in some embodiments, one of the other frequency bands supported by the third antenna element 13 can be achieved by the third radiating stub 131 further coupling the stub portion between the second end P2 of the first radiating stub 111 and the second grounding point G2 under the excitation of the third feed 132.

[0147] Please see Figure 19 This is another simplified structural diagram of the antenna assembly 1 in some embodiments of this application. Figure 19 As shown, the first radiating branch 111 also includes a second grounding point G2, which is located between the first feed point F1 and the first grounding point G1, and the portion of the first radiating branch 111 between the first grounding point G1 and the second grounding point G2 is grounded.

[0148] That is, in some embodiments, the portion between the first grounding point G1 and the second grounding point G2 of the first radiating branch 111 is grounded, which can more effectively improve the isolation between the first resonant mode and the second resonant mode.

[0149] In some embodiments, when the first radiating stub 111 is used as an NFC (Near Field Communication) antenna, only the first grounding point G1 and the second grounding point G2 of the first radiating stub 111 are grounded, and both the first grounding point G1 and the second grounding point G2 of the first radiating stub 111 are grounded through capacitors, and are kept in a floating state by the capacitors, thus meeting the requirements of an NFC antenna. Since there are two grounding points G1 and G2 that are always located between the radiating stubs where the main radiated currents of the first and second resonant modes are located in any of the aforementioned situations, the isolation between the first and second resonant modes can also be increased.

[0150] Wherein, when the first radiating stub 111 is not shared as an NFC (Near Field communication) antenna, the portion between the first grounding point G1 and the second grounding point G2 of the first radiating stub 111 can be grounded.

[0151] In some embodiments, multiple grounding points may be included between the first grounding point G1 and the second grounding point G2, and each grounding point is spaced apart and grounded through a capacitor. Thus, even if the first radiating stub 111 is used as an NFC antenna, the requirements of the NFC antenna can be met. Due to the large number of grounding points, the isolation between the first resonant mode and the second resonant mode can be significantly increased.

[0152] In some embodiments, as previously described, the first frequency band is the N78 band. In some embodiments, the first feed 112 is used to excite the antenna assembly 1 to operate in the first frequency band N78, and also to excite the antenna assembly 1 to operate in the WIFI 5G band. The second feed 122 is used to excite the antenna assembly 1 to operate in the N78 band, and also to excite the antenna assembly 1 to operate in the mid-high frequency band (MHB). In some embodiments, when the third antenna unit 13 includes a fourth matching unit M4 and a third feed 123, the third feed 123 can be used to excite the antenna assembly 1 to operate in the GPS L1 and WIFI-2.4G bands.

[0153] Among them, such as Figure 1 , Figure 5 , Figure 12 as well as Figure 16 As shown in the figure, the second radiating stub 121 further includes a third grounding point G3, which is located at the fourth end P4 of the second radiating stub 121, or at a position close to the fourth end P4 of the second radiating stub 121, for grounding. The third radiating stub 131 further includes a fourth grounding point G4, which is located at the fourth end P4 of the third radiating stub 131, or at a position close to the fourth end P4 of the second radiating stub 12, for grounding.

[0154] In some embodiments, the second radiating stub 12 forms an inverted F antenna (IFA) through the third grounding point G3 and the second feed point F2, wherein the third feed source 123 can excite the antenna assembly 1 to operate in the mid-high frequency band (MHB) via the inverted F antenna. The third radiating stub 131 also forms an inverted F antenna through the fourth grounding point G4 and the preset connection point F3, and the third feed source 123 can excite the antenna assembly 1 to operate in either the GPS L1 or WIFI-2.4G frequency band via this overall inverted F antenna.

[0155] Obviously, in some embodiments, the first frequency band may also be a frequency band among low frequency, medium frequency, and medium-high frequency.

[0156] Therefore, although the first radiating branch 111 of the first antenna element 11 and the second radiating branch 121 of the second antenna element 12 are arranged adjacently and spaced apart, and the first feed 112 connected to the first radiating branch 111 and the second feed 122 connected to the second radiating branch 121 both excite the antenna assembly 1 to operate in the first frequency band, the radiating branch where the main radiating current of the antenna assembly 1 is located when the first feed 112 excites the antenna assembly 1 to generate the first resonant mode operating in the first frequency band is different from the radiating branch where the main radiating current of the antenna assembly 1 is located when the second feed 122 excites the antenna assembly 1 to generate the second resonant mode operating in the first frequency band is different. This effectively increases the isolation of the antenna assembly 1 operating in the first resonant mode and the second resonant mode simultaneously in the first frequency band, and effectively reduces the interference between them.

[0157] Please see Figure 20 This is a plan view of an electronic device 100 in some embodiments of this application. The electronic device includes the antenna assembly 1 in any of the foregoing embodiments.

[0158] like Figure 20 As shown, the electronic device 100 includes a top end D11, a bottom end D12, and two side ends D13 and D14. In some embodiments, as Figure 20 As shown, the first radiating branch 111, the second radiating branch 121 and the third radiating branch 131 are disposed at the top D11 of the electronic device 100.

[0159] like Figure 1 , Figure 5 , Figure 12 , Figure 16 as well as Figure 20 As shown, the first radial branch 111 and the second radial branch 121 can be straight strips, and the third radial branch 131 can be approximately L-shaped. Thus, by setting the third radial branch 131 to an L-shape, it can be set at the top corner position, and the three radial branches, the first radial branch 111, the second radial branch 121 and the third radial branch 131, can be set within the limited space at the top D11, and are spaced apart from each other.

[0160] Obviously, in this application, the shapes of the first radiating branch 111, the second radiating branch 121, and the third radiating branch 131 are not limited. In some embodiments, the first radiating branch 111 and the third radiating branch 131 may be elongated, and the second radiating branch may be approximately L-shaped and located at the apex.

[0161] Obviously, in other embodiments, the first radiating branch 111, the second radiating branch 121 and the third radiating branch 131 may also be simultaneously disposed on the bottom end D12 and any one of the two side ends D13 and D14 of the electronic device 100.

[0162] In this embodiment, the top end D11 and bottom end D12 of the electronic device 100 are short sides, and the two side ends D13 and D14 are long sides. In some embodiments, when the first radiating branch 111, the second radiating branch 121, and the third radiating branch 131 are simultaneously disposed on one of the two side ends D13 and D14 of the electronic device 100, since the side ends D13 and D14 are long sides and have sufficient space, the first radiating branch 111, the second radiating branch 121, and the third radiating branch 131 can all be straight strips.

[0163] In this application, the use of directional terms such as "top" and "bottom" when describing the electronic device 100 is primarily based on the orientation of the device when held and used by the user. "Top" refers to the position facing the top of the electronic device 100, and "bottom" refers to the position facing the bottom of the electronic device 100. This does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the orientation of the electronic device 100 in a real-world application scenario. In some embodiments, the bottom of the electronic device 100 is the end with a headphone jack and a USB port, and the top of the electronic device 100 is the opposite end to the end with the headphone jack and USB port, or it may refer to the end with a camera, receiver, etc.

[0164] Among them, such as Figure 20 As shown, the electronic device 100 includes a frame B1, and the aforementioned first radiating branch 111, second radiating branch 121, and third radiating branch 131 may be metal segments disposed on the frame B1. For example, when the first radiating branch 111, second radiating branch 121, and third radiating branch 131 are disposed at the top D11 of the electronic device 100, the first radiating branch 111, second radiating branch 121, and third radiating branch 131 may be disposed on the portion of the frame B1 located at the top D11 of the electronic device 100.

[0165] In some embodiments, the frame B1 may be a metal frame, and the first radiating branch 111, the second radiating branch 121 and the third radiating branch 131 may be metal frame segments formed by opening a gap X1 in the metal frame.

[0166] In some embodiments, the frame B1 of the electronic device 100 may also be a non-metallic frame, and the first radiating branch 111, the second radiating branch 121 and the third radiating branch 131 may be metal segments disposed in the frame B1 of the electronic device 100, and are also spaced apart from each other by a gap X1.

[0167] That is, in some embodiments, the frame B1 of the electronic device 100 may also be a non-metallic frame with low conductivity, such as plastic, ceramic, etc. The first radiating branch 111, the second radiating branch 121 and the third radiating branch 131 are metal segments disposed in the frame B1 of the electronic device 100, for example, metal segments attached to the inner sidewall of the frame B1 of the electronic device 100.

[0168] That is, in some embodiments of this application, the first radiating branch 111, the second radiating branch 121 and the third radiating branch 131 can be directly formed by the frame B1, or carried and fixed on the frame B1.

[0169] In some embodiments, the first radiating branch 111, the second radiating branch 121, and the third radiating branch 131 are fixedly disposed on the antenna bracket formed of insulating material, and then fixed to the electronic device 100 by the antenna bracket.

[0170] In some embodiments, the antenna support may be made of LCP (Liquid Crystal Polymer). In other embodiments, the antenna support may be made of other insulating materials, such as plastics, resins, rubber, etc.

[0171] In some embodiments, the first radiating branch 111, the second radiating branch 121, and the third radiating branch 131 are fixedly disposed on the antenna bracket formed of insulating material, and then fixed to the corresponding position in the electronic device 100 by the antenna bracket, for example, near the top D11 of the electronic device 100.

[0172] Among them, such as Figure 20 As shown, the electronic device 100 also includes a middle frame 2, which serves as the overall ground of the electronic device 100 and provides ground potential.

[0173] Specifically, the aforementioned first grounding point G1 and other grounding points are located at the connection and grounding of the middle frame 2.

[0174] like Figure 20As shown, the electronic device 100 also includes a motherboard 3, wherein the aforementioned first feed source 112, first matching unit M1, second feed source 122, second matching unit M2, third feed source 132 and third matching unit M3 may be specifically disposed on the motherboard 3.

[0175] in, Figure 20 Electronic devices 100 in the middle include Figure 1 The antenna assembly 1 shown is illustrated as an example. Obviously, the electronic device 100 may include the antenna assembly 1 in any of the foregoing embodiments.

[0176] Therefore, the electronic device 100 of this application, by including the antenna assembly 1 with the above-described structure, can effectively increase the isolation of the antenna assembly 1 when it operates simultaneously in the first frequency band in the first resonant mode and the second resonant mode, and effectively reduce the interference between them.

[0177] The electronic device 100 also includes a memory, a battery, etc., which are not relevant to the improvements in this application and will not be described in detail.

[0178] The electronic device 100 described in this application can be any electronic device with an antenna, such as a mobile phone, tablet computer, or laptop computer.

[0179] Although the electronic device 100 and its antenna assembly 1 of this application are arranged adjacently and spaced apart from the first radiating branch 111 of the first antenna unit 11 and the second radiating branch 121 of the second antenna unit 12, and both the first feed 112 connected to the first radiating branch 111 and the second feed 122 connected to the second radiating branch 121 excite the antenna assembly 1 to operate in the first frequency band, the radiating branch where the main radiating current of the antenna assembly 1 is located when the first feed 112 excites the antenna assembly 1 to generate the first resonant mode operating in the first frequency band is different from the radiating branch where the main radiating current of the antenna assembly 1 is located when the second feed 122 excites the antenna assembly 1 to generate the second resonant mode operating in the first frequency band is different, thereby effectively increasing the isolation of the antenna assembly 1 operating in the first resonant mode and the second resonant mode operating in the first frequency band, and effectively reducing the interference between them.

[0180] The various embodiments of this application have their own emphasis, and some embodiments do not focus on the structure described in particular. In the absence of conflict, the content of the corresponding structure in other embodiments can be referred to.

[0181] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Where there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes: The first antenna element includes a first radiating stub, a first matching unit, and a first feed source. The first radiating stub includes a first feed point, and the first feed point is connected to the first feed source through the first matching unit. The second antenna element includes a second radiating stub, a second matching unit, and a second feed source. The second radiating stub is located on one side of the first radiating stub and is coupled to the first radiating stub. The second radiating stub includes a second feed point, which is connected to the second feed source through the second matching unit. The third antenna element includes a third radiating stub, which is located on the side of the first radiating stub away from the second radiating stub and is coupled to the first radiating stub. Wherein, the first feed source is used to excite the antenna assembly to generate a first resonant mode operating in the first frequency band, and the second feed source is used to excite the antenna assembly to generate a second resonant mode operating in the first frequency band. The radiating stub where the main radiating current of the first resonant mode is located is different from the radiating stub where the main radiating current of the second resonant mode is located. Wherein, the main radiated current of the first resonant mode is located in the first radiating branch, and the main radiated current of the second resonant mode is located in the second radiating branch; The first radiating stub includes a first end and a second end, the second radiating stub includes a third end and a fourth end, and the third radiating stub includes a fifth end and a sixth end. The first end and the second end of the first radiating stub are respectively adjacent to and spaced apart from the third end of the second radiating stub and the fifth end of the third radiating stub. The main radiating current of the first resonant mode is located in the third stub portion between the first feed point and the second end of the first radiating stub, and the main radiating current of the second resonant mode is located in the fourth stub portion between the second feed point and the third end of the second radiating stub.

2. The antenna assembly according to claim 1, characterized in that, The third antenna unit further includes a third matching unit, which is connected between a preset connection point of the third radiating stub and ground for matching adjustment of the first frequency band. The electrical length of the first stub portion between the preset connection point of the third radiating stub and the fifth terminal under the matching of the third matching unit is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The first feed excites the first radiating stub and operates in the first frequency band by coupling the excitation of the first stub portion through the first radiating stub, so that the main radiating current of the first resonant mode is located in the first stub portion.

3. The antenna assembly according to claim 2, characterized in that, The third antenna unit further includes a fourth matching unit and a third feed source. The fourth matching unit is connected between the third feed source and the preset connection point. The preset connection point is the feed point of the third radiating stub. The fourth matching unit is used for matching adjustment in other frequency bands. The third feed source is used to excite the antenna assembly to operate in other frequency bands.

4. The antenna assembly according to claim 1, characterized in that, The preset connection point of the third radiating stub is grounded, and the electrical length of the first stub portion between the preset connection point and the fifth terminal is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The first feed excites the first radiating stub and operates in the first frequency band by coupling the first radiating stub portion to excite it, so that the main radiating current of the first resonant mode is located in the first stub portion.

5. The antenna assembly according to claim 2 or 4, characterized in that, The electrical length of the second stub portion between the first grounding point and the first end of the first radiating stub is λ1 / 4. The second feed excites the second radiating stub and operates in the first frequency band by coupling the second radiating stub portion to excite the second stub portion, so that the main radiating current of the second resonant mode is located in the second stub portion.

6. The antenna assembly according to claim 2 or 4, characterized in that, The electrical length of the fourth stub portion between the second feed point and the third end of the second radiating stub is λ1 / 4 under the matching of the second matching unit. The second feed source excites the fourth stub portion of the second radiating stub to operate in the first frequency band, so that the main radiated current of the second antenna unit when operating in the first frequency band is located in the fourth stub portion.

7. The antenna assembly according to claim 1, characterized in that, The electrical length of the fourth stub portion between the second feed point of the second radiating stub and the third end under the matching of the second matching unit is λ1 / 4, where λ1 is the wavelength corresponding to the first frequency band. The second feed source excites the fourth stub portion of the second radiating stub to operate in the first frequency band, so that the main radiating current of the second resonant mode is located in the fourth stub portion.

8. The antenna assembly according to claim 7, characterized in that, The electrical length of the third stub portion between the first feed point and the second end of the first radiating stub is λ1 / 4 under the matching of the first matching unit. The first feed source excites the third stub portion of the first radiating stub to operate in the first frequency band, so that the main radiating current of the first resonant mode is located in the third stub portion.

9. The antenna assembly according to claim 1, characterized in that, The first radiating branch also includes a second grounding point, which is located between the first feed point and the first grounding point. The portion of the first radiating branch between the first grounding point and the second grounding point is grounded.

10. The antenna assembly according to claim 1, characterized in that, The first frequency band is the N78 band.

11. An electronic device, characterized in that, The electronic device includes an antenna assembly as described in any one of claims 1-10.

12. The electronic device according to claim 11, characterized in that, The electronic device includes a frame, and the first radiating branch, the second radiating branch, and the third radiating branch are metal segments disposed on the frame.

13. The electronic device according to claim 12, characterized in that, The frame is a metal frame, and the first radiating branch, the second radiating branch, and the third radiating branch are metal frame segments formed by the metal frame through gaps.

14. The electronic device according to claim 12, characterized in that, The frame is a non-metallic frame, and the first radiating branch, the second radiating branch, and the third radiating branch are metal segments disposed in the frame.

15. The electronic device according to claim 11, characterized in that, The first radiating branch, the second radiating branch, and the third radiating branch are mounted in the electronic device via an antenna bracket.

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