Antenna assembly, middle frame assembly and electronic device

Abstract

The present application discloses an antenna assembly, a middle frame assembly and an electronic device, and relates to the field of communication technology. In the antenna assembly, a first radiator is provided with a first feeding point, a second grounding point and a first grounding point in sequence from the first end to the second end, the first grounding point is electrically connected to the first tuning control circuit, the second grounding point is electrically connected to the second tuning control circuit, the first tuning control circuit and the second tuning control circuit are used for grounding, the first radiator works on the base film from the second end to the first feeding point to generate a first resonance mode supporting a first frequency band, the first frequency band is a low frequency band, and the first tuning control circuit is used to tune the first resonance mode to change the bandwidth of the first frequency band and improve the antenna performance of the antenna assembly.

Description

Technical Field

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

[0002] With the development of technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and their functions are becoming more and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, the communication performance of antenna components in electronic devices in related technologies is not good enough and there is still room for improvement. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide an antenna assembly, comprising:

[0004] A first radiator, wherein the first radiator has a first end and a second end, a first feeding point is arranged between the first end and the second end of the first radiator to be electrically connected to a first feeding source, a first grounding point is arranged between the second end and the first feeding point of the first radiator, the first grounding point is electrically connected to a first tuning control circuit, and the first tuning control circuit is used for grounding, a second grounding point is arranged between the first grounding point and the first feeding point of the first radiator, the second grounding point is electrically connected to a second tuning control circuit, and the second tuning control circuit is used for grounding, the first radiator operates on a base membrane from the second end to the first feeding point to generate a first resonance mode, the first resonance mode supports a first frequency band, the first frequency band is a low frequency band, and the first tuning control circuit is used for tuning the first resonance mode to change the bandwidth of the first frequency band.

[0005] In order to solve the above technical problems, the adopted technical solution is: a middle frame assembly, the middle frame assembly is provided with the above antenna assembly, and the middle frame assembly includes:

[0006] A substrate is provided with a ground plane and a feeding power source, the first ground point and the second ground point are both electrically connected to the ground plane, and the first feeding point is electrically connected to the feeding power source; and

[0007] A frame is arranged around the substrate, and the first radiator is arranged on the frame.

[0008] In order to solve the above technical problems, the adopted technical solution is: an electronic device, a middle frame assembly, provided with an antenna assembly, the antenna assembly comprising:

[0009] The middle frame assembly as described above;

[0010] A display screen is arranged on one side of the middle frame assembly; and

[0011] The back cover is arranged on the other side of the middle frame assembly to form a receiving cavity with the middle frame assembly.

[0012] The technical solution described in the present application has the following beneficial effects: the antenna assembly in the present application provides an excitation signal through the first feeding power source, so that the first antenna generates a first resonance mode in the base membrane from the second end to the first feeding point, and the first resonance mode supports the first frequency band in the low frequency band. Furthermore, in the process of tuning the first resonance mode by the first tuning control circuit, the bandwidth of the first frequency band can be changed, so that the first resonance mode supports multiple different first frequency bands, so as to improve the antenna performance of the antenna assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the structure of an antenna assembly in one embodiment of the present application;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure of the first radiator;

[0016] Figure 3 for Figure 1 A schematic diagram of the structure of the second radiator;

[0017] Figure 4 is a resonant current distribution diagram of a first resonant mode in the antenna assembly;

[0018] Figure 5 is a resonant current distribution diagram of a second resonant mode in the antenna assembly;

[0019] Figure 6 is a resonant current distribution diagram of the third resonant mode in the antenna assembly;

[0020] Figure 7 for Figure 4 , Figure 5 and Figure 6 Return loss graphs for the three resonant modes in the antenna assembly shown;

[0021] Figure 8 for Figure 7 Dynamically adjusted return loss graphs for the three resonant modes in the antenna assembly shown;

[0022] Fig. 9is a resonant current distribution diagram of the fourth resonant mode in the antenna assembly;

[0023] Fig.10 is a resonant current distribution diagram of the fifth resonant mode in the antenna assembly;

[0024] Fig.11 is a resonant current distribution diagram of the sixth resonant mode in the antenna assembly;

[0025] Fig.12 for Fig. 9 , Fig.10 and Fig.11 Return loss graphs for the three resonant modes in the antenna assembly shown;

[0026] Fig.13 for Fig.12 Dynamically adjusted return loss graphs for the three resonant modes in the antenna assembly shown;

[0027] Fig.14 This is a schematic diagram of the structure of an electronic device in an embodiment of the present application;

[0028] Fig.15 for Fig.14 A schematic diagram of the structure in which the antenna assembly of the embodiment shown is installed on the middle frame assembly. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is particularly noted that the following implementation methods are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following implementation methods are only some implementation methods of the present application rather than all implementation methods. All other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The present application provides an antenna assembly. The antenna assembly can be applied to electronic devices. The antenna assembly can realize multi-mode switching in low frequency bands, and can also realize multi-mode switching in medium and high frequency bands. In addition, the antenna assembly can also increase the bandwidth of the medium frequency band, so that the antenna assembly supports the carrier aggregation (CA) band.

[0032] As used herein, "electronic equipment" (which may also be referred to as "terminals" or "mobile terminals" or "electronic devices") include, but are not limited to, devices that are configured to receive / send communication signals via a wireline connection (e.g., via a public switched telephone network (PSTN), a digital subscriber line (DSL), digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (e.g., for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and / or another communication terminal). A communication terminal that is configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / Intranet access, Web browsers, organizers, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

[0033] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of the antenna assembly 100 in one embodiment of the present application. The antenna assembly 100 can be a hybrid of one or more of a flexible printed circuit (FPC) antenna, a laser direct structuring (LDS) antenna, a print direct structuring (PDS) antenna, and a metal branch antenna. Of course, the antenna assembly 100 can also be other types of antennas, which will not be described in detail.

[0034] The antenna assembly 100 may include a first radiator 10 and a second radiator 20 spaced apart from and capacitively coupled to the first radiator 10. A first gap 101 is provided between the first radiator 10 and the second radiator 20, so that the first radiator 10 and the second radiator 20 are capacitively coupled through the first gap 101. "Capacitive coupling" means that an electric field is generated between the first radiator 10 and the second radiator 20, and the signal of the first radiator 10 can be transmitted to the second radiator 20 through the electric field, and the signal of the second radiator 20 can be transmitted to the first radiator 10 through the electric field, so that the first radiator 10 and the second radiator 20 can achieve electrical signal conduction even when they are disconnected.

[0035] The terms "first", "second", "third", etc. in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include at least one of the features.

[0036] It can be understood that in other embodiments, the names "first radiator", "second radiator" and "radiator" in the above embodiments can be converted to each other. For example, "first radiator" can be converted to "second radiator", and correspondingly, "second radiator" can be converted to "first radiator".

[0037] In addition, the first radiator 10 can be used as the first antenna 30. The first antenna 30 can be a low-frequency antenna. The second radiator 20 can be used as the second antenna 40 with a portion of the first radiator 10. The second antenna 40 can be a medium-high frequency antenna. It can be seen that when the second antenna 40 is working, it can not only use the second radiator 20 but also use a portion of the first radiator 10 to send and receive electromagnetic wave signals, so that the second antenna 40 can work in a wider medium-high frequency band to support the carrier aggregation frequency band. In addition, the second antenna 40 can also realize the reuse of radiators such as the first radiator 10, and also realize spatial multiplexing, which is conducive to reducing the size of the antenna assembly 100. It can be understood that the first antenna 30 may not be limited to the first radiator 10. The second antenna 40 may not be limited to a portion of the first radiator 10 and the second radiator 20. The antenna assembly 100 may include the first antenna 30 and the second antenna 40 described in this embodiment.

[0038] It can be understood that the first antenna 30 and the second antenna 40 can be used separately. Of course, the first antenna 30 and the second antenna 40 can also be used together. In the antenna assembly 100, the usage of the first antenna 30 and the second antenna 40 can be set according to actual needs. That is, in some embodiments, the first antenna 30 or the second antenna 40 in the antenna assembly 100 can be omitted.

[0039] In other embodiments, the names "first antenna", "second antenna" and "antenna" in the above embodiments can be converted to each other, for example, "first antenna" can be converted to "second antenna", and correspondingly, "second antenna" can be converted to "first antenna".

[0040] See also Figure 1 and Figure 2 , Figure 2 for Figure 1 Schematic diagram of the structure of the first radiator 10. The first radiator 10 is provided with a first end 11 away from the first slot 101 and a second end 12 close to the first slot 101.

[0041] The first radiator 10 is provided with a first feeding point 13 between the first end 11 and the second end 12. In some embodiments, the first feeding point 13 is electrically connected to a matching circuit such as a first matching circuit 14. The first matching circuit 14 may be electrically connected to a feeding source such as a first feeding source 15.

[0042] The first radiator 10 is provided with a first grounding point 16 between the second end 12 and the first feeding point 13 . The first grounding point 16 can be electrically connected to a first tuning control circuit 17 . The first tuning control circuit 17 is grounded.

[0043] The first tuning control circuit 17 is mainly to meet the requirements of the first antenna 30 supporting multiple low frequency bands. Of course, in some embodiments, the requirements of the second antenna 40 for multiple medium and high frequency bands can also be met. Therefore, the first tuning control circuit 17 can be composed of a switch control unit and / or a load circuit, or an adjustable capacitor and / or an adjustable inductor. In one embodiment, the switch control unit can be a switch chip with a switch function, or a single-pole multi-throw switch or a single-pole single-throw switch.

[0044] The first radiator 10 is provided with a second grounding point 18 between the first feeding point 13 and the first grounding point 16 . The second grounding point 18 can be electrically connected to a second tuning control circuit 19 . The second tuning control circuit 19 is grounded.

[0045] It is understandable that in other embodiments, the names "first grounding point", "second grounding point" and "grounding point" in the above embodiments can be converted to each other. For example, "second grounding point" can be converted to "first grounding point", and correspondingly, "first grounding point" can be converted to "second grounding point".

[0046] The second tuning control circuit 19 is mainly used to meet the requirements of more than 40 medium and high frequency bands of the second antenna. Therefore, the second tuning control circuit 19 can be a bandpass filter circuit. In some embodiments, the second tuning control circuit 19 can also include a switch control unit connected in series with the bandpass filter circuit. In one embodiment, the switch control unit can be a switch chip with a switch function, or a single-pole multi-throw switch or a single-pole single-throw switch.

[0047] See also Figure 1 and Figure 3 , Figure 3 for Figure 1 The second radiator 20 is provided with a third end 21 away from the first slot 101 and a fourth end 22 close to the first slot 101.

[0048] It can be understood that in other embodiments, the names "first end", "second end", "third end", "fourth end" and "end" in the above embodiments can be converted to each other. For example, the "first end" can be converted to the "second end" and correspondingly, the "second end" can be converted to the "first end".

[0049] The third end 21 of the second radiator 20 is grounded. Figure 1 The length between the third end 21 of the second radiator 20 and the ground point is reduced, thereby making the size of the second radiator 20 smaller.

[0050] The second radiator 20 is provided with a second feeding point 23 between the third end 21 and the fourth end 22. The second feeding point 23 is electrically connected to a third tuning control circuit 24. The third tuning control circuit 24 may be electrically connected to a feeding source, for example, a second feeding source 25.

[0051] It can be understood that in other embodiments, the names "first tuning control circuit", "second tuning control circuit", "third tuning control circuit" and "tuning control circuit" in the above embodiments can be converted to each other. For example, the "first tuning control circuit" can be converted to the "second tuning control circuit", and correspondingly, the "second tuning control circuit" can be converted to the "first tuning control circuit".

[0052] In addition, in other embodiments, the names "first feeding point", "second feeding point" and "feeding point" in the above embodiments can be converted to each other. For example, the "first feeding point" can be converted to the "second feeding point", and correspondingly, the "second feeding point" can be converted to the "first feeding point".

[0053] In addition, in other embodiments, the names "first feed source", "second feed source" and "feed source" in the above embodiments can be converted to each other, for example, "first feed source" can be converted to "second feed source", and correspondingly, "second feed source" can be converted to "first feed source".

[0054] The third tuning control circuit 24 is mainly used to meet the requirements of more than 40 medium and high frequency bands of the second antenna. Therefore, the third tuning control circuit 24 can be composed of a switch control unit and / or a load circuit, or an adjustable capacitor and / or an adjustable inductor. In one embodiment, the switch control unit can be a switch chip with a switch function, or a single-pole multi-throw switch or a single-pole single-throw switch.

[0055] It can be understood that a matching circuit such as a second matching circuit (not shown) connected in series with the third tuning control circuit 24 may be provided between the second feeding point 23 and the second feeding source 25 .

[0056] In addition, the names "first matching circuit", "second matching circuit" and "matching circuit" in the above embodiments can be converted to each other. For example, "first matching circuit" can be converted to "second matching circuit", and correspondingly, "second matching circuit" can be converted to "first matching circuit".

[0057] See also Figure 4 , Figure 4 : is a resonant current distribution diagram of the first resonant mode in the antenna assembly 100. The first antenna 30, for example, the first radiator 10, operates in a fundamental mode between the second end 12 and the first feeding point 13 to generate a first resonant mode. Specifically, the first feeding source 15 is used to provide a first excitation signal for generating an electromagnetic signal in a first frequency band. When the first excitation signal acts between the second end 12 and the first feeding point 13, a first resonant mode is generated. The resonant current of the first resonant mode is distributed between the second end 12 and the first feeding point 13. The resonant current of the first resonant mode flows as shown in FIG. Figure 4 As shown by the dashed arrow, when the first antenna 30 , for example, the first radiator 10 , resonates in the first resonance mode, the resonant current on the first radiator 10 flows from the second end 12 to the first feeding point 13 .

[0058] See also Figure 5 , Figure 5 : is a resonant current distribution diagram of the second resonant mode in the antenna assembly 100. The first antenna 30, for example, the first radiator 10, operates in a fundamental mode between the first end 11 and the second end 12 to generate a second resonant mode. Specifically, the first feed source 15 is used to provide a second excitation signal that generates an electromagnetic signal in a second frequency band. When the second excitation signal acts between the first end 11 and the second end 12, a second resonant mode is generated. The resonant current of the second resonant mode is distributed between the first end 11 and the second end 12. The resonant current of the second resonant mode flows as shown in FIG. Figure 5 As shown by the dotted arrow, the resonant current on the first antenna 30 , such as the first radiator 10 , includes a first current Ix and a second current Iy. The first current Ix flows to the first feeding point 13 via the second end 12 , and the second current Iy flows to the first feeding point 13 via the first end 11 .

[0059] See also Figure 6 , Figure 6 : is a resonant current distribution diagram of the third resonant mode in the antenna assembly 100. The first antenna 30, for example, the first radiator 10, operates in the fundamental mode between the first end 11 and the first feeding point 13 to generate the third resonant mode. Specifically, the first feeding source 15 is used to provide a third excitation signal for generating an electromagnetic signal in a third frequency band. When the third excitation signal acts between the first end 11 and the first feeding point 13, a third resonant mode is generated. The resonant current of the third resonant mode is distributed between the first end 11 and the first feeding point 13. The resonant current of the third resonant mode flows as shown in FIG. Figure 6As shown by the dashed arrow, when the first antenna 30 resonates in the third resonance mode, the resonance current on the first antenna 30 , for example, the first radiator 10 , flows from the first end 11 to the first feeding point 13 .

[0060] See also Figure 7 and Figure 8 , Figure 7 for Figure 4 , Figure 5 and Figure 6 The return loss curves of the three resonant modes in the antenna assembly 100 are shown. Figure 8 for Figure 7 The three resonance modes in the antenna assembly 100 are dynamically adjusted return loss curves. The first antenna 30, for example, the first radiator 10, can support the first resonance mode A1, the second resonance mode A2, and the third resonance mode A3. Among them, the frequency band corresponding to the first resonance mode A1 is the first frequency band B1, the frequency band corresponding to the second resonance mode A2 is the second frequency band B2, and the frequency band corresponding to the third resonance mode A3 is the third frequency band B3. Among them, the first frequency band B1 can be a low frequency band, and the first resonance mode A1 has a better effect.

[0061] The frequency band of the first radiator 10 during operation can be tuned by the first tuning control circuit 17. During tuning, the return loss curve can change. For example Fig.15 The return loss curve I is transformed into the return loss curve II. Fig.15 The return loss curve I is transformed into the return loss curve III. Fig.15 The return loss curve II is transformed into the return loss curve III.

[0062] In one embodiment, the first tuning control circuit 17 may be a switch or a variable capacitor.

[0063] exist Figure 8In the return loss curves Ⅰ, Ⅱ, and Ⅲ, the first frequency band under the first resonance mode A1 may be different frequency bands in the low frequency (LB) band. Then, the first tuning control circuit 17 may be tuned so that the first frequency band may include at least one of LTE-4G (a general term for LTE network standards such as TD-LTE (Time Division Long Term, OFDMA technology) and LTE (Long Term Evolution), which may also be referred to as 4G-LTE) frequency bands (for example, at least one of LTE-5 frequency bands, LTE-8 frequency bands, LTE-12 frequency bands, LTE-17 frequency bands, LTE-18 frequency bands, LTE-19 frequency bands, LTE-20 frequency bands, LTE-26 frequency bands, and LTE-28 frequency bands, etc.), carrier aggregation frequency bands (for example, at least one of LTE Band 8 frequency bands, etc.), and NR-5G (also known as 5G new radio, also known as 5G new air interface, also known as 5G-NR, also referred to as NR) frequency bands (for example, at least one of N20 frequency bands and N28 frequency bands, etc.).

[0064] See also Fig. 9 , Fig. 9 : is a resonant current distribution diagram of the fourth resonant mode in the antenna assembly 100. The second antenna 40, for example, the second radiator 20, operates in the fundamental mode between the third end 21 and the second feeding point 23 to generate the fourth resonant mode. Specifically, the second feeding source 25 is used to provide a fourth excitation signal for generating an electromagnetic signal in a fourth frequency band. When the fourth excitation signal acts between the third end 21 and the second feeding point 23, a fourth resonant mode is generated. The resonant current of the fourth resonant mode is distributed between the third end 21 and the second feeding point 23. The resonant current of the fourth resonant mode flows as shown in FIG. Fig. 9 As shown by the dashed arrow, when the second antenna 40 , for example, the second radiator 20 , resonates in the fourth resonance mode, the resonance current on the second radiator 20 flows from the third end 21 to the second feeding point 23 .

[0065] See also Fig.10 , Fig.10 : is a resonant current distribution diagram of the fifth resonant mode in the antenna assembly 100. The second antenna 40, for example, the first radiator 10, operates in the fundamental mode between the second end 12 and the second grounding point 18 to generate the fifth resonant mode. Specifically, the second feed source 25 is used to provide a fifth excitation signal for generating an electromagnetic signal in the fifth frequency band. When the fifth excitation signal acts between the second end 12 and the second grounding point 18, the fifth resonant mode is generated. The resonant current of the fifth resonant mode is distributed between the first end 11 and the second grounding point 18. The resonant current of the fifth resonant mode flows as shown in FIG. Fig.10 As indicated by the dashed arrow, the resonant current on the second antenna 40 , for example, the first radiator 10 , flows toward the second end 12 via the second grounding point 18 .

[0066] See also Fig.11 , Fig.11 : is a resonant current distribution diagram of the sixth resonant mode in the antenna assembly 100. The second antenna 40, for example, the first radiator 10, operates in a fundamental mode between the second end 12 and the first grounding point 16 to generate the sixth resonant mode. Specifically, the second feed source 25 is used to provide a sixth excitation signal for generating an electromagnetic signal in the sixth frequency band. When the sixth excitation signal acts between the second end 12 and the first grounding point 16, the sixth resonant mode is generated. The resonant current of the sixth resonant mode is distributed between the second end 12 and the first grounding point 16. The resonant current of the sixth resonant mode flows as shown in FIG. Fig.11 As shown by the dashed arrow, the current on the second antenna 40 , for example, the first radiator 10 , flows to the second end 12 via the first grounding point 16 .

[0067] See also Fig.12 and Fig.13 , Fig.12 for Fig. 9 , Fig.10 and Fig.11 The return loss curves of the three resonant modes in the antenna assembly 100 are shown. Fig.13 for Fig.12 The three resonance modes in the antenna assembly 100 are dynamically adjusted return loss curves. The second antenna 40, such as a portion of the first radiator 10 and the second radiator 20, can support the fourth resonance mode C1, the fifth resonance mode C2 and the sixth resonance mode C3. Among them, the frequency band corresponding to the fourth resonance mode C1 is the fourth frequency band B1, the frequency band corresponding to the fifth resonance mode C2 is the fifth frequency band B2, and the frequency band corresponding to the sixth resonance mode C3 is the sixth frequency band B3. Among them, the fourth resonance mode has a relatively poor effect, and the fifth resonance mode and the sixth resonance mode have better effects.

[0068] The frequency band of the second antenna 40 during operation can be tuned by controlling the first tuning control circuit 17 and the third tuning control circuit 24. During tuning, the return loss curve can be changed, for example Fig.13 The return loss curve IV is transformed into the return loss curve V. For example, the return loss curve IV is transformed into the return loss curve VI. Fig.13 The return loss curve V is transformed into the return loss curve VI.

[0069] In one embodiment, the first tuning control circuit 17 is a switch or a variable capacitor, the third tuning control circuit 24 is a switch or a variable capacitor, and the second tuning control circuit 19 is a bandpass filter circuit.

[0070] exist Fig.13In the return loss curves IV, V, and VI, the fourth frequency band under the fourth resonance mode C1, the fifth frequency band under the fifth resonance mode C2, and the sixth frequency band B3 under the sixth resonance mode C3 jointly form a relatively wide medium and high frequency band. The frequency band of the second antenna 40 when working can be tuned by using the first tuning control circuit 17 and the third tuning control circuit 24, and the fourth frequency band under the fourth resonance mode C1, the fifth frequency band under the fifth resonance mode C2, and the sixth frequency band B3 under the sixth resonance mode C3 can be tuned to jointly form a medium and high frequency band bandwidth. Thereby, the fourth frequency band under the fourth resonance mode C1, the fifth frequency band under the fifth resonance mode C2 and the sixth frequency band B3 under the sixth resonance mode C3 together form a medium and high frequency band, which may include at least one of the LTE-4G frequency band (for example, at least one of the LTE-1 frequency band, LTE-3 frequency band, LTE-4 frequency band, LTE-7 frequency band, LTE-38 frequency band, LTE-39 frequency band, LTE-40 frequency band and LTE-41 frequency band, etc.), the NR-5G frequency band (for example, at least one of the N1 frequency band, N3 frequency band, N40 frequency band and N41 frequency band, etc.) and the carrier aggregation frequency band (for example, LTE Band 1 frequency band + LTE Band 3 frequency band, LTE Band 1 frequency band + LTE Band 3 frequency band + LTE Band 7 frequency band, etc.).

[0071] In one embodiment, the frequency band of the second antenna 40 when operating can be tuned by the first tuning control circuit 17, the second tuning control circuit 19 and the third tuning control circuit 24. The fourth frequency band under the fourth resonance mode C1, the fifth frequency band under the fifth resonance mode C2 and the sixth frequency band B3 under the sixth resonance mode C3 together form a wider medium and high frequency band, so that the antenna 40 can support medium and high frequency (MHB (1000-3000MHz)), medium frequency (MB (1500-2200MHz)), high frequency (HB (2300-2700MHz)), ultra high frequency (UHB (3400-3800MHz)) and ultra wideband (Sub 6G (4500-6500MHz)).

[0072] In one embodiment, the fifth frequency band under the fifth resonance mode C2 and the sixth frequency band B3 under the sixth resonance mode C3 together form a medium and high frequency band and may also include an NR-5G band (for example, at least one of the N1 band, the N3 band, the N7 band, the N40 band, the N41 band, the N77 band, the N78 band and the N79 band, etc.) and at least one of the ultra-wideband Sub-6G bands.

[0073] In one embodiment, the second tuning control circuit 19 may include a bandpass filter circuit and a switch control unit connected in series with the bandpass filter circuit.

[0074] It can be understood that in other embodiments, the names "first resonance mode", "second resonance mode", "third resonance mode", "fourth resonance mode", "fifth resonance mode", "sixth resonance mode" and "resonance mode" in the above embodiments can be converted to each other. For example, the "first resonance mode" can be converted to the "second resonance mode", and correspondingly, the "second resonance mode" can be converted to the "first resonance mode".

[0075] It can be understood that in other embodiments, the names "first frequency band", "second frequency band", "third frequency band", "fourth frequency band", "fifth frequency band", "sixth frequency band" and "frequency band" in the above embodiments can be converted to each other. For example, "first frequency band" can be converted to "second frequency band", and correspondingly, "second frequency band" can be converted to "first frequency band".

[0076] It can be understood that in other embodiments, the names of "first excitation signal", "second excitation signal", "third excitation signal", "fourth excitation signal", "fifth excitation signal", "sixth excitation signal" and "excitation signal" in the above embodiments can be converted to each other. For example, the "first excitation signal" can be converted to the "second excitation signal", and correspondingly, the "second excitation signal" can be converted to the "first excitation signal".

[0077] Next, an electronic device is described, which can be equipped with the antenna assembly 100 in the above embodiment. The electronic device can be any one of a plurality of electronic devices, including but not limited to cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, calculators, programmable remote controls, pagers, netbook computers, personal digital assistants (PDAs), portable multimedia players (PMPs), moving picture experts group (MPEG-1 or MPEG-2), audio layer 3 (MP3) players, portable medical devices, digital cameras, and combinations thereof.

[0078] See also Fig.14 , Fig.14 The electronic device 200 may include a display screen 50 for displaying information, a middle frame assembly 60 for mounting the display screen 50 on one side, a circuit board 70 mounted on the middle frame assembly 60, a battery 80 mounted on the middle frame assembly 60, and a back cover 90 snap-fitted to the other side of the middle frame assembly 60.

[0079] In some embodiments, the electronic device 200 may include but is not limited to a mobile phone, a mobile internet device (MID), an e-book, a portable player station (Play Station Portable, PSP) or a personal digital assistant (Personal Digital Assistant, PDA) and other electronic devices with communication functions.

[0080] The display screen 50 may be a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display screen, etc., for displaying information and images.

[0081] The material of the middle frame assembly 60 can be a metal such as magnesium alloy, aluminum alloy, stainless steel, etc. Of course, the material is not limited thereto, and can also be other. The middle frame assembly 60 can be placed between the display screen 50 and the back cover 90. The middle frame assembly 60 can be used to carry the display screen 50. The middle frame assembly 60 and the back cover 90 are snap-fitted to form the outer contour of the electronic device 200, and a receiving cavity is formed inside. The receiving cavity can be used to accommodate electronic components such as a camera, a circuit board 70, a battery 80, a processor, and various types of sensors in the electronic device 200.

[0082] The circuit main board 70 is installed in the accommodating cavity and can be installed at any position in the accommodating cavity. The circuit main board 70 can be the main board of the electronic device 200. The processor of the electronic device 200 can be set on the circuit main board 70. The circuit main board 70 can also be integrated with one, two or more functional components such as a motor, a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface), a camera, a distance sensor, an ambient light sensor, a gyroscope, etc. At the same time, the display screen 50 can be electrically connected to the circuit main board 70.

[0083] The battery 80 is installed in the accommodating cavity and can be installed at any position in the accommodating cavity. The battery 80 can be electrically connected to the circuit main board 70 so that the battery 80 can power the electronic device 200. A power management circuit can be provided on the circuit main board 70. The power management circuit is used to distribute the voltage provided by the battery 80 to various electronic components in the electronic device 200, such as the display screen 50.

[0084] The back cover 90 can be made of the same material as the middle frame assembly 60, or other materials. The back cover 90 can be integrally formed with the middle frame assembly 60. In some embodiments, the back cover 90 can wrap the middle frame assembly 60 and can carry the display screen 50. The back cover 90 can be formed with a rear camera hole, a fingerprint recognition module installation hole, and other structures.

[0085] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0086] See also Fig.15 , Fig.15 for Fig.14 The schematic diagram of the structure of the antenna assembly 100 of the embodiment shown is installed on the middle frame assembly 60. The middle frame assembly 60 may include a substrate 61 for carrying the display screen 50 and a frame 62 arranged around the substrate 61. The substrate 61 is arranged opposite to the back cover 90. The frame 62 can be used to snap-fit ​​with the back cover 90. That is, the substrate 61, the frame 62 and the back cover 90 are arranged to form a receiving cavity.

[0087] The substrate 61 may be a conductive metal, or other materials. A ground plane and a power supply may be disposed on the substrate 61. In some embodiments, the ground plane and the power supply may not be disposed on the substrate 61, but may be directly disposed on the circuit main board 70.

[0088] The frame 62 may be a conductive metal, so the frame 62 may also be referred to as a "metal frame". Of course, the frame 62 may also be other materials. The frame 62 may include a first frame 621, a second frame 622, a third frame 623, and a fourth frame 624 connected end to end in sequence. The first frame 621, the second frame 622, the third frame 623, and the fourth frame 624 are arranged around the substrate 61 and may be connected and fixed to the substrate 61.

[0089] In some embodiments, the first frame 621, the second frame 622, the third frame 623 and the fourth frame 624 are arranged to form a rounded rectangle. Of course, other shapes such as a circle or a triangle are also possible. In some embodiments, the first frame 621 and the third frame 623 are arranged opposite to each other, and the second frame 622 and the fourth frame 624 are arranged opposite to each other.

[0090] The middle frame assembly 60 and the back cover 90 may form a housing assembly. The housing assembly may not be limited to the middle frame assembly 60 and the back cover 90. The housing assembly may be provided with the antenna assembly 100 by laminating, bonding, snapping, buckling, welding, etc.

[0091] In some embodiments, the antenna assembly 100 may be formed by a housing assembly. For example, the antenna assembly 100 may be formed by processing a frame 62 , such as a first frame 621 and a second frame 622 .

[0092] Please refer again Fig.15, a gap 63 is provided between the second frame 622 and the substrate 61. The gap 63 may be extended toward the first frame 621 in the extension direction of the second frame 622. The gap 63 may be extended in the extension direction of the first frame 621 to be formed between the first frame 621 and the substrate 61.

[0093] The second frame 622 is provided with a first slit 631 and a second slit 632 communicating with the gap 63 , so that the second radiator 20 of the antenna assembly 100 is formed between the first slit 631 and the second slit 632 .

[0094] The first frame 621 is provided with a third slit 633 communicating with the gap 63 , so that the frame 62 forms the first radiator 10 of the antenna assembly 100 between the first slit 631 and the third slit 633 .

[0095] In the present application, the first radiator 10 utilizes the second frame 622, which can reduce the use of the first frame 621 and effectively improve the low-frequency loss of the first radiator 10 by the human hand. The specific length of the first radiator 10 utilizing the second frame 622 can be adjusted according to the hand model and the required resonance length of the low-frequency band.

[0096] It can be understood that the extension length of the gap 63 can be determined as needed. In some embodiments, the gap 63 may not be extended in the extension direction of the second frame 622, that is, it may not be set between the second frame 622 and the substrate 61. In some embodiments, the gap 63 may not be extended in the extension direction of the first frame 621, that is, it may not be extended between the first frame 621 and the substrate 61.

[0097] It can be understood that in other embodiments, the names "first gap", "second gap", "third gap", "gap" and "gap" in the above embodiments can be converted to each other. For example, "first gap" can be converted to "second gap", and correspondingly, "second gap" can be converted to "first gap".

[0098] It can be understood that in other embodiments, the names "first border", "second border", "third border", "fourth border" and "border" in the above embodiments can be converted to each other. For example, the "first border" can be converted to the "second border", and correspondingly, the "second border" can be converted to the "first border".

[0099] In addition, the locations of the first slit 631 , the second slit 632 and the third slit 633 can be adjusted according to needs and the length of the frame, which will not be elaborated herein.

[0100] The first tuning control circuit 17 in the antenna assembly 100 may be electrically connected to a ground plane on the substrate 61 or the circuit board 70 to be grounded.

[0101] The second tuning control circuit 19 in the antenna assembly 100 may be electrically connected to a ground plane on the substrate 61 or the circuit main board 70 to be grounded.

[0102] The first feeding source 15 in the antenna assembly 100 may be a feeding source on the substrate 61 or the circuit main board 70 .

[0103] The third end 21 of the antenna assembly 100 may be electrically connected to a ground plane on the substrate 61 or the circuit board 70 to be grounded.

[0104] The second feeding source 25 in the antenna assembly 100 may be a feeding source on the substrate 61 or the circuit main board 70 .

[0105] It can be understood that in order to stabilize the connection strength between the substrate 61 and the frame 62, an insulating material such as resin can be filled between the gap 63, the first gap 631, the second gap 632 and the third gap 633, so that the first radiator 10 and the second radiator 20 in the antenna assembly 100 are part of the frame 62, which further improves the appearance of the electronic device 200.

[0106] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An antenna assembly, It is characterized in that The antenna assembly comprises: a first radiator, wherein the first radiator has a first end and a second end, a first feeding point is provided between the first end and the second end of the first radiator to be electrically connected to a first feeding source, a first grounding point is provided between the second end and the first feeding point of the first radiator, the first grounding point is electrically connected to a first tuning control circuit, the first tuning control circuit is used for grounding, a second grounding point is provided between the first grounding point and the first feeding point of the first radiator, the second grounding point is electrically connected to a second tuning control circuit, the second tuning control circuit is used for grounding, the first radiator operates in a fundamental mode from the second end to the first feeding point to generate a first resonant mode, the first resonant mode supports a first frequency band, the first frequency band is a low frequency band, and the first tuning control circuit is used for tuning the first resonant mode to change the bandwidth of the first frequency band; and A second radiator is spaced apart from the first radiator and capacitively coupled with the first radiator, wherein a portion of the first radiator from the second end to the second grounding point and the second radiator are configured to form a medium-high frequency antenna; The first radiator operates in a fundamental mode from the first end to the second end to generate a second resonance mode, and a resonance current of the second resonance mode includes a first current and a second current, the first current flows to the first feeding point via the second end, and the second current flows to the first feeding point via the first end; And / or, the first radiator operates in a fundamental mode from the first end to the first feeding point to generate a third resonance mode, and a resonance current of the third resonance mode flows to the first feeding point via the first end; And / or, the second radiator has a third end and a fourth end, and is capacitively coupled with the first radiator at the fourth end and the second end, so that the first radiator and the second radiator cooperate to support medium and high frequency bands, the third end is used for grounding, and the second radiator is provided with a second feeding point between the third end and the fourth end, the second feeding point is electrically connected to a third tuning control circuit, and the third tuning control circuit is electrically connected to a second feeding source; the second radiator operates in a fundamental mode from the third end to the second feeding point to generate a fourth resonant mode, the first radiator operates in a fundamental mode from the second grounding point to the second end to generate a fifth resonant mode, and the first radiator operates in a fundamental mode from the first grounding point to the second end to generate a sixth resonant mode, and the fourth resonant mode, the fifth resonant mode and the sixth resonant mode jointly support multiple different medium and high frequency bands.

2. The antenna assembly according to claim 1, It is characterized in that The resonant current of the first resonant mode flows from the second end to the first feeding point.

3. The antenna assembly according to claim 1, It is characterized in that The first frequency band includes at least one of the LTE-5 band, LTE-8 band, LTE-12 band, LTE-17 band, LTE-18 band, LTE-19 band, LTE-20 band, LTE-26 band and LTE-28 band in the LTE-4G band, and / or the first frequency band includes at least one of the N20 band and the N28 band in the NR-5G band.

4. The antenna assembly according to any one of claims 1 to 3, It is characterized in that The first tuning control circuit is a switch control unit or an adjustable capacitor.

5. The antenna assembly according to claim 1, It is characterized in that The first feeding point is electrically connected to a matching circuit, and the matching circuit is electrically connected to the first feeding source.

6. The antenna assembly according to claim 1, It is characterized in that The multiple different mid-high frequency bands include at least one of the LTE-1 band, LTE-3 band, LTE-4 band, LTE-7 band, LTE-38 band, LTE-39 band, LTE-40 band and LTE-41 band in the LTE-4G band, and / or the multiple different mid-high frequency bands include at least one of the N1 band, N3 band, N40 band and N41 band in the NR-5G band, and / or the multiple different mid-high frequency bands include the carrier aggregation band LTE Band 1 band + LTE Band 3 band or the carrier aggregation band LTE Band 1 band + LTE Band 3 band + LTE Band 7 band.

7. The antenna assembly according to claim 1, It is characterized in that The resonant current of the fourth resonant mode flows to the second feeding point via the third end.

8. The antenna assembly according to claim 1, It is characterized in that The resonant current of the fifth resonant mode flows to the second end via the second grounding point.

9. The antenna assembly according to claim 1, It is characterized in that The resonant current of the sixth resonant mode flows toward the second end via the first grounding point.

10. The antenna assembly according to any one of claims 1 to 3 and 5 to 9, It is characterized in that The first tuning control circuit is a switch control unit or an adjustable capacitor, the third tuning control circuit is a switch control unit or an adjustable capacitor, the second tuning control circuit includes a bandpass filter circuit, the second grounding point is electrically connected to the bandpass filter circuit, and the bandpass filter circuit is grounded.

11. The antenna assembly according to claim 10, It is characterized in that The third tuning control circuit also includes a switch control unit connected in series with the bandpass filter circuit.

12. The antenna assembly according to claim 11, It is characterized in that The multiple different mid-high frequency bands include at least one of the N1 band, N3 band, N7 ​​band, N40 band, N41 band, N77 band, N78 band and N79 band in the NR-5G band, and / or the multiple different mid-high frequency bands include an ultra-wideband Sub-6G band.

13. A middle frame assembly, It is characterized in that The middle frame assembly is provided with the antenna assembly according to any one of claims 1 to 12, and the middle frame assembly comprises: A substrate is provided with a ground plane and a feeding power source, the first ground point and the second ground point are both electrically connected to the ground plane, and the first feeding point is electrically connected to the feeding power source; and A frame is arranged around the substrate, and the first radiator is arranged on the frame.

14. An electronic device, It is characterized in that include: The middle frame assembly as claimed in claim 13; A display screen is arranged on one side of the middle frame assembly; as well as The back cover is arranged on the other side of the middle frame assembly to form a receiving cavity with the middle frame assembly.

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