Antenna module and electronic device

Abstract

The application discloses an antenna module and an electronic device, and belongs to the technical field of communication. The antenna module comprises a first radiator, a first feed source and a first coupling member. The first coupling member is coupled with a first part of the first radiator to form a first coupling capacitor. The first coupling member is grounded. The first part is located between a first end of the first radiator and a second end of the first radiator. The first end of the first radiator is electrically connected with the first feed source. The second end of the first radiator is grounded. The working frequency band of the first feed source comprises a near field communication (NFC) frequency band and a new radio (NR) frequency band. The antenna module comprises a first working mode and a second working mode. In the first working mode, an NFC excitation signal provided by the first feed source is grounded through the second end of the first radiator to realize an NFC antenna mode. In the second working mode, an NR excitation signal provided by the first feed source is grounded through the first coupling capacitor to realize a first NR antenna mode.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of communication, and particularly relates to an antenna module and an electronic device. BACKGROUND

[0002] With the development of technology and science and technology, the volume of electronic devices such as mobile phones is getting smaller and smaller, the frequency bands and the number of antennas are getting more and more, and the antenna design in electronic devices is facing the situation of insufficient space. The design of the antenna will be influenced by the camera, the speaker, the appearance, the battery, the mainboard and other fields and components, and finding a new antenna layout scheme on the electronic device is an important research direction.

[0003] In addition, the camera on the electronic device is getting bigger and bigger, and the metal decoration ring of the rear camera is also getting bigger and bigger. The volume of the decoration ring and the camera occupies the layout space of the original near field communication (NFC) antenna, resulting in that the layout area of the NFC antenna is getting smaller and smaller, and is closer to the frame of the electronic device. The frame of the electronic device is the layout position of the new radio (NR) antenna, the NFC antenna cannot be multiplexed with the NR antenna position, and the NFC antenna and the NR antenna exist layout space conflict. Only by reducing the wiring space of the NFC antenna, the performance of the NFC antenna is sacrificed to ensure the performance of the NR antenna. SUMMARY

[0004] The purpose of the embodiments of the application is to provide an antenna module and an electronic device, which can make the NFC antenna and the NR antenna share the radiator, can provide enough wiring space for the NFC antenna, and can ensure the performance of the NR antenna.

[0005] In a first aspect, the embodiments of the application provide an antenna module, which comprises a first radiator, a first feed source and a first coupling member.

[0006] The first coupling member is coupled with a first part of the first radiator to form a first coupling capacitor, the first coupling member is grounded, and the first part is located between a first end of the first radiator and a second end of the first radiator.

[0007] The first end of the first radiator is electrically connected with the first feed source, and the second end of the first radiator is grounded.

[0008] The working frequency band of the first feed source comprises a near field communication (NFC) frequency band and a new radio (NR) frequency band.

[0009] The antenna module comprises a first working mode and a second working mode.

[0010] In the first working mode, the NFC excitation signal provided by the first feed source is grounded through the second end of the first radiator to realize an NFC antenna mode.

[0011] In the second working mode, the NR excitation signal provided by the first feed source is grounded through the first coupling capacitor to realize a first NR antenna mode.

[0012] In a second aspect, an electronic device is provided, which comprises the antenna module as described in the first aspect.

[0013] In the embodiments of the present application, the NR antenna and the NFC antenna share the first feed source and the first radiator, and are coupled to the first part of the first radiator through the first coupling member, so that the first coupling capacitor is formed. In this way, the NR signal can be grounded through the first coupling capacitor, so as to realize the NR antenna mode between the first end of the first radiator and the first part. The NFC signal cannot be grounded through the first coupling capacitor, but is grounded through the second end of the first radiator, so as to realize the NFC antenna mode between the first end of the first radiator and the second end of the first radiator. In the embodiments of the present application, the NFC antenna and the NR antenna share the radiator, so that the overall length of the first radiator does not conflict with the layout space of the NR antenna. The NFC antenna can provide sufficient wiring space, and the antenna performance of the NR antenna can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the layout space of an NR high-frequency antenna and an NFC antenna in related technologies;

[0015] Figure 2 is one of equivalent structure schematic diagrams of an antenna module in the embodiments of the present application;

[0016] Figure 3 is a structure schematic diagram of an antenna module in the embodiments of the present application;

[0017] Figure 4 is a current distribution diagram of a metal ring LB antenna in the embodiments of the present application;

[0018] Figure 5a is a current distribution diagram when the LB noise signal is grounded through the first coupling capacitor in the embodiments of the present application;

[0019] Figure 5b is a current distribution diagram when the LB noise signal is not grounded through the first coupling capacitor;

[0020] Figure 6a is another equivalent structure schematic diagram of an antenna module in the embodiments of the present application;

[0021] Figure 6b is a third equivalent structure diagram of an antenna module in an embodiment of the present application;

[0022] Figure 7a is a first coupling capacitor structure diagram in an embodiment of the present application;

[0023] Figure 7b is a first coupling capacitor structure diagram in an embodiment of the present application; Figure 7a is a first coupling capacitor split structure diagram in the

[0024] Figure 8a is a second coupling capacitor structure diagram in an embodiment of the present application;

[0025] Figure 8b is a first coupling capacitor split structure diagram in the Figure 8a DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0027] The terms “first”, “second”, and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by “first”, “second”, etc. are usually a category and do not limit the number of objects, for example, the first object can be one or more. In addition, “and / or” in the specification and claims means at least one of the connected objects, and the character “ / ” generally represents an “or” relationship between the front and rear associated objects.

[0028] In the related art, there is a layout space conflict between the NFC antenna and the NR antenna on the mobile phone. The specific description is as follows: the mobile phone camera is getting bigger and bigger, and the rear camera metal decoration ring is also getting bigger and bigger. The volume of the decoration ring and the camera occupies the original layout space of the NFC antenna, resulting in that the layout area of the NFC antenna is getting smaller and smaller, and is closer and closer to the mobile phone frame. However, the position of the mobile phone frame is the layout position of the NR high-frequency antenna. In order to avoid the interference of the NFC antenna to the NR antenna, the NFC antenna cannot be multiplexed with the NR high-frequency antenna position, and therefore, the wiring space of the NFC antenna can only be reduced, which will cause the performance of the NFC antenna to decline.

[0029] For example, as shown in Figure 1 ​As shown: N001 to N004 are the layout spaces of some commonly used NR high-frequency antennas, located close to the edge of the phone. At this time, the available layout space for the NFC antenna is only in the upper half of the phone, and the space N001 to N004 where the rear camera metal decorative ring Q1 and the NR high-frequency antenna are located needs to be removed. This makes the routing space of the NFC antenna very narrow, and the NFC antenna with smaller routing space will inevitably lose some NFC antenna performance.

[0030] In this embodiment, the NR antenna and the NFC antenna share a first feed and a first radiator. The NR antenna is coupled to a first portion of the first radiator via a first coupling element, forming a first coupling capacitor. This allows the NR signal to be grounded through the first coupling capacitor, thus achieving NR antenna mode between the first end and the first portion of the first radiator. The NFC signal, however, cannot be grounded through the first coupling capacitor; instead, it is grounded through the second end of the first radiator, achieving NFC antenna mode between the first end and the second end of the first radiator. By sharing a radiator, this embodiment ensures that the overall length of the first radiator does not conflict with the layout space of the NR antenna, providing sufficient routing space for the NFC antenna while maintaining the antenna performance of the NR antenna.

[0031] The antenna module and electronic device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0032] See Figure 2 The antenna module provided in this application embodiment includes: a first radiator AE, a first feed 1, and a first coupling element 2;

[0033] The first coupling element 2 is coupled to the first part C of the first radiator AE to form the first coupling capacitor 20. The first coupling element 2 is grounded, and the first part C is located between the first end A of the first radiator AE and the second end E of the first radiator AE.

[0034] The first end A of the first radiator AE is electrically connected to the first feed source 1, and the second end E of the first radiator AE is grounded.

[0035] The operating frequency bands of the first feed source 1 include the NFC band and the NR band;

[0036] The antenna module includes a first operating mode and a second operating mode;

[0037] In the first working mode, the NFC excitation signal provided by the first feed source 1 is grounded through the second terminal E of the first radiator AE to realize the NFC antenna mode.

[0038] In the second operating mode, the NR excitation signal provided by the first feed source 1 is grounded through the first coupling capacitor 20 to realize the first NR antenna mode.

[0039] In some implementations, the first radiator AE may extend in a straight line or in a bent direction, without being specifically limited here.

[0040] It should be noted that, Figure 2 This is used to illustrate the length of the first radiator AE, and the relative positions of the first feed source 1 and the first coupling member 2 along the length of the first radiator AE, without limiting the first radiator AE to extend in a straight line.

[0041] In some implementations, the length of the first radiator AE is typically greater than or equal to 100 mm, for example, approximately 100 mm to 130 mm.

[0042] In some implementations, the NR band of the first feed source 1 may include at least one of the bands N1, N3, N39, etc.

[0043] In some implementations, the first coupling capacitor 20 has the following function:

[0044] 1) Isolate NFC current to prevent NFC excitation current from going to ground through the first coupling capacitor 20;

[0045] 2) As the grounding point of the NR antenna, the high-frequency excitation current of the NR antenna is grounded through the first coupling capacitor 20.

[0046] Therefore, the entire first radiator AE serves as the NFC antenna, and the portion between the first end A and the first part C on the first radiator AE is reused as the NR antenna. In this way, the antenna layout space of the NFC antenna and the NR antenna is reused, and the NR antenna and the NFC antenna are fed to the same point on the first radiator AE.

[0047] In some implementations, the first operating mode can be understood as the half-wave mode of the first radiator AE.

[0048] Of course, the first operating mode can also be the 1 / 4 wavelength mode, 3 / 2 wavelength mode or 3 / 4 wavelength mode of the first radiator AE, etc., without specific limitations here.

[0049] In some implementations, the second operating mode can be understood as the half-wave mode of the first segment AC, wherein the first segment AC represents the segment on the first radiator AE located between the first end A and the first part C.

[0050] Of course, the second working mode can also be the 1 / 4 wavelength mode, 3 / 2 wavelength mode or 3 / 4 wavelength mode of the first segment AC, etc., without specific limitations here.

[0051] In some implementations, the length of the first segment AC can be determined based on the NR antenna frequency band in the first NR antenna mode. For example, assuming that the first segment AC is used to implement the half-wave mode of the NR antenna, the length of the first segment AC can be equal to half the wavelength corresponding to the center frequency of the NR frequency band.

[0052] Of course, the frequency band of the NR signal radiated by the first segment AC can also be adjusted by setting a tuning module on the first segment AC. Here, it is not limited that the length of the first segment AC is equal to half the wavelength corresponding to the center frequency of the NR band.

[0053] As an optional implementation method, such as Figure 3 As shown, the antenna module provided in this embodiment further includes: a metal ring 3 and a second feed source 4;

[0054] The operating frequency band of the second feed 4 includes the low-frequency LB band, and the second feed 4 is electrically connected to the second part 31 of the metal ring 3.

[0055] The first radiator AE is disposed on one side of the metal ring 3 and is spaced apart from the metal ring 3;

[0056] The fifth part (32 and 33) of the metal ring 3 is grounded. The difference between the length of the first segment of the metal ring 3 and λ / 4 is greater than 0 and less than a preset value, where λ is the wavelength corresponding to the working frequency band of the second feed 4.

[0057] In some embodiments, the metal ring 3 may include a closed metal ring with a circumference of about 200 mm.

[0058] In some implementations, the LB band of the second feed 4 includes Long Term Evolution (LTE) LB bands such as B5, B8, and B28.

[0059] It should be noted that when the second feed source 4 feeds power to the second part 31, current wave antinodes and current wave nodes are formed on the metal ring 3. The feed point of the second feed source 4 is located near the current wave node, that is, the length of the segment on the metal ring 3 between the feed point of the second feed source 4 and the current wave node is less than or equal to a preset value, such as 0.1mm, 0.5mm, etc. The difference between the distance length between the fifth part (32 and 33) and the feed point of the second feed source 4 and λ / 4 is greater than 0 and less than or equal to the preset value, which can make the fifth part the point of maximum current on the metal ring 3, that is, the fifth part is the current wave antinode on the metal ring 3, and the second part 31 can be located near the current wave node.

[0060] For example: Figure 3As shown, the fifth part includes a first current antinode node 32 and a second current antinode node 33. The feed point of the second feed source 4 is located near the left side of the current wave node. At this time, the length of the first segment of the metal ring 3 between the first current antinode node 32 and the feed point of the second feed source 4 is slightly less than λ / 4; the length of the first segment of the metal ring 3 between the second current antinode node 33 and the feed point of the second feed source 4 is slightly greater than λ / 4.

[0061] Of course, in some embodiments, if the size of the metal ring 3 is small, or the operating frequency of the second feed source 4 is low, it may be possible that there is only one current antinode on the metal ring 3. In this case, the length of the first segment of the metal ring 3 located on the side of the current antinode and the feed point of the second feed source 4 is slightly greater than λ / 4, and the length of the first segment of the metal ring 3 located on the other side of the current antinode and the feed point of the second feed source 4 is slightly less than λ / 4.

[0062] It should be noted that the impedance of the current wave node is the smallest, close to 0Ω. When the distance between the second part 31 and the current wave node is less than or equal to a preset value, the purpose is to make the impedance at the second part 31 approximately 50Ω, so as to achieve impedance matching of the second feed source 4.

[0063] In some implementations, such as Figure 3 and Figure 4 As shown, two current antinodes can be formed on the metal ring 3, namely, the fifth part includes the first current antinode 32 and the second current antinode 33. At this time, the first current antinode 32 and the second current antinode 33 are respectively grounded.

[0064] In this embodiment, by grounding the current wave antinode formed on the metal ring 3 and setting the feed point of the second feed source 4 near the current wave node, the main operating mode of the LB antenna on the metal ring 3 can be half-wave mode.

[0065] In some implementations, when the antenna module provided in the embodiments of this application is placed in an electronic device, the aforementioned metal ring can reuse the decorative ring on the electronic device, such as the decorative ring of a rear camera.

[0066] In this embodiment, the metal ring 3 on the electronic device can be reused as the radiator of the LB antenna, which can improve the problem of insufficient space for LB antenna layout on the metal frame of the electronic device.

[0067] In some implementations, such as Figure 3 As shown, the first radiator AE has a U-shaped structure, with the open end of the U-shaped structure facing the metal ring 3, so that the metal ring 3 is partially housed within the U-shaped groove formed by the U-shaped structure. For example: Figure 3As shown, the first end A of the first radiator AE is located near the top of the metal ring 3, and the second end E of the first radiator AE is located near the bottom of the metal ring 3. This reduces the overall layout space of the first radiator AE and the metal ring 3.

[0068] Of course, except in such Figure 3 The area shown is set as the first radiator AE, and it can also be set as follows: Figure 1 The first radiator AE is set in the NFC layout space shown and in other positions in N001 to N004. The specific position of the first radiator AE and the relative position of the first radiator AE to the metal ring 3 are not specifically limited here.

[0069] Furthermore, in this embodiment, the metal ring 3 is a circular metal ring as an example. In other embodiments, the metal ring 3 may also be a rectangular, triangular, elliptical or other shapes of metal ring, which is not specifically limited here.

[0070] It is worth mentioning that in related technologies, LB antennas are set on the frame of electronic devices. In addition, in order to ensure the normal use of NFC antennas, the radiator trace length of NFC antennas is generally greater than 100mm. Since the NFC layout is closer to the frame, NFC traces longer than 100mm can easily couple out noise from the LB antenna, affecting the efficiency of the LB antenna.

[0071] In this embodiment, the first radiator AE is disposed on one side of the metal ring 3 and spaced apart from the metal ring 3. When the gap between the first radiator AE and the metal ring 3 is small, in order to avoid the LB antenna efficiency being reduced due to the coupling of LB clutter on the first radiator AE, the first coupling capacitor 20 can also be used in this embodiment to destroy the clutter mode coupled by the LB antenna on the metal ring 3 on the first radiator AE.

[0072] In some implementations, the first location C is situated at the wave node of the LB clutter current coupled onto the first radiator AE.

[0073] For example: Suppose that the LB clutter of metal ring 3 is in half-wave mode on the first radiator AE, such as Figure 5a and Figure 5b As shown, where, Figure 5a and Figure 5b The solid line in the diagram represents the LB clutter current distribution, and the dashed line represents the NFC current distribution. Figure 5a In the process, the LB clutter current on the first radiator AE is grounded through the first coupling capacitor 20 at the current wave node, which can disrupt the half-wave mode of the LB clutter on the first radiator AE, thereby improving the performance of the LB antenna on the metal ring 3; while Figure 5bIf the first coupling capacitor 20 is not formed at the first location C, the LB clutter current on the first radiator AE cannot be grounded through the first coupling capacitor 20, and a half-wave mode of LB clutter will be coupled out on the first radiator AE.

[0074] In some implementations, assuming the LB antenna mode on the metal ring 3 is half-wave mode, the length of the first segment AC can be approximately equal to one-quarter wavelength of the coupled LB clutter, approximately 50 mm. Given that the overall length of the first radiator AE is approximately 100 mm, the first part C is roughly located at the center of the first radiator AE.

[0075] Optionally, the specific influence of the dielectric environment and the influence of the metal coupling environment may differ. The length of the first segment AC is generally around 35mm to 70mm. The influence of the dielectric environment refers to the influence of the spatial layout and dielectric constant of the dielectric near the first radiator AE, while the influence of the metal coupling refers to the influence of the capacitive coupling between the metal near the first radiator AE and the first radiator AE.

[0076] In some implementations, the capacitance value of the first coupling capacitor 20 may be between 0.5pF and 150pF.

[0077] It should be noted that if the capacitance value of the first coupling capacitor 20 is too large, the isolation effect on the NFC current will be poor; if the capacitance value of the first coupling capacitor 20 is too small, the LB noise reduction effect and the NR grounding effect will be unsatisfactory.

[0078] In this embodiment, by setting the capacitance value of the first coupling capacitor 20 between 0.5pF and 150pF, the first coupling capacitor 20 can be used to isolate the NFC current, conduct the NR current, and disrupt the clutter mode coupled to the first radiator AE by the LB antenna on the metal ring 3.

[0079] As an optional implementation method, such as Figure 6a As shown, the antenna module provided in this embodiment further includes: a second coupling element 5 and a first matching module 6;

[0080] The second coupling element 5 is coupled to the third part B of the first radiator AE to form the second coupling capacitor 50. The second coupling element 5 is grounded through the first matching module 6. The third part B is located between the first part C and the first end A of the first radiator AE.

[0081] The antenna module further includes a third working mode, and the first matching module 6 is used to adjust the antenna module to be in the second working mode or the third working mode.

[0082] In the third operating mode, the NR excitation signal provided by the first feed source 1 is grounded through the second coupling capacitor 50 and the first matching module 6 to realize the second NR antenna mode.

[0083] In some implementations, the second NR antenna mode refers to an NR antenna mode implemented based on a half-wave mode of the second segment AB, i.e., the second segment AB is the operating part of the second NR antenna mode. Here, the second segment AB represents the segment between the first end A of the first radiator AE and the third portion B of the first radiator AE.

[0084] The first NR antenna mode refers to the NR antenna mode implemented based on the half-wave mode of the first segment AC, that is, the first segment AC is the working part of the first NR antenna mode.

[0085] In some implementations, at least one of the capacitance, inductance, and resistance values ​​of the first matching module 6 is adjustable, so that switching between the first NR antenna mode and the second NR antenna mode can be achieved by adjusting at least one of the capacitance, inductance, and resistance values ​​of the first matching module 6.

[0086] Optionally, the first matching module 6 may include a switching switch and at least two matching branches, each with different capacitance, inductance, or resistance. The first end of the switching switch is electrically connected to the second coupling member 5, and the second end of the switching switch may be electrically connected to at least one of the at least two matching branches. Thus, by adjusting the matching branch connected by the switching switch, at least one of the capacitance, inductance, and resistance values ​​of the first matching module 6 can be adjusted.

[0087] In some implementations, when the first matching module 6 is adjusted to a high impedance state (e.g., open circuit, large inductor grounding, or small capacitor grounding), the NR antenna operates in the half-wave mode of the first segment AC, enabling signal radiation in frequency bands N1 and N3; when the first matching module 6 is adjusted to a low impedance state (e.g., 0 ohm grounding, small inductor grounding, or large capacitor grounding), the NR antenna operates in the half-wave mode of the second segment AB, enabling signal radiation in frequency bands N40 and N41.

[0088] In this embodiment, by adding a second coupling element 5 and a first matching module 6 to the ground at the third part B on the first radiator AE, the operating mode and operating frequency band of the NR antenna can be adjusted.

[0089] As an optional implementation method, such as Figure 6b As shown, the antenna module provided in this embodiment further includes: a third feed 7, a capacitor 8, an inductor 9, and a third coupling element 11;

[0090] The third feed source 7 is electrically connected to the second terminal E of the first radiator AE through the capacitor 8, and the second terminal E of the first radiator AE is grounded through the inductor 9.

[0091] The third coupling element 11 is coupled to the fourth part D of the first radiator AE to form a third coupling capacitor 110. The third coupling element 11 is grounded, and the fourth part D is located between the second end E and the first part C of the first radiator AE.

[0092] The third feed 7 operates in the second NR band, and the antenna module also includes a fourth operating mode.

[0093] In the fourth operating mode, the NR excitation signal provided by the third feed 7 is grounded through the third coupling capacitor 110 to realize the third NR antenna mode.

[0094] It should be noted that the third coupling capacitor 110 has a similar function and working principle to the first coupling capacitor 20, with the following differences: the third coupling capacitor 110 is used to allow the NR signal from the third feed source 7 to pass through while isolating the NFC signal; that is, the NR signal from the third feed source 7 is grounded through the third coupling capacitor 110, and the NFC signal is grounded through the second terminal E of the first radiator AE. The first coupling capacitor 20, on the other hand, is used to allow the NR signal and LB noise signal from the first feed source 1 to pass through while isolating the NFC signal. The structure and working principle of the third coupling capacitor 110 will not be elaborated here; please refer to the explanation of the structure and working principle of the first coupling capacitor 20 in the aforementioned embodiments.

[0095] In some implementations, the third NR antenna mode can be understood as an operating mode excited on the third third segment DE, such as a half-wavelength mode of the third segment DE, or a quarter-wavelength mode of the third segment DE, etc., without specific limitations here. Here, the third segment DE represents the segment on the first radiator AE located between the second end E and the fourth part D of the first radiator AE.

[0096] In some implementations, by setting an appropriate length for the third segment DE, NR antennas of different frequency bands, such as N1, N41, and N78, can be implemented on the third segment DE.

[0097] It should be noted that the function of capacitor 8 is to allow high-frequency NR signals to pass through while isolating NFC signals on the first radiator AE. In this way, the third feed source 7 can supply power to the third segment DE through capacitor 8, and the NFC signal is prevented from being transmitted to the third feed source 7 through capacitor 8. The function of inductor 9 includes allowing NFC signals on the first radiator AE to pass through while isolating signals in the second NR band. In this way, the NFC signals on the first radiator AE can be grounded through the inductor 9 from the second terminal E of the first radiator AE, while the NR signal is isolated from being grounded from the second terminal E of the first radiator AE.

[0098] In this embodiment, feed sources are respectively provided at opposite ends of the first radiator AE. The first feed source 1 is used to feed the first NR antenna mode, the second NR antenna mode, and the NFC antenna mode, while the third feed source 7 is used to feed the third NR antenna mode. Compared to... Figure 6a Regarding the antenna module shown, Figure 6b The antenna module shown can also reuse the third segment DE of the first radiator AE to add an NR antenna.

[0099] It should be noted that, as Figure 6b In the illustrated embodiment, the antenna module is exemplified by including the second coupler 5, the first matching module 6, the third feed 7, the capacitor 8, the inductor 9, and the third coupler 11. In other embodiments, only the third feed 7, the capacitor 8, the inductor 9, and the third coupler 11 may be provided in the antenna module, without the second coupler 5 and the first matching module 6; this is not a specific limitation.

[0100] As an optional implementation method, such as Figure 6b As shown, the antenna module provided in this embodiment further includes: a second matching module 12;

[0101] The third coupling element 11 is grounded through the second matching module 12;

[0102] The second matching module 12 is used to adjust the NR band switching of the antenna module in the third NR antenna mode.

[0103] In this process, at least one of the capacitance, inductance, and resistance values ​​of the second matching module 12 is adjustable.

[0104] It should be noted that the second matching module 12 has a similar structure and working principle to the first matching module 6, and will not be described in detail here.

[0105] In this embodiment, by adjusting at least one of the capacitance, inductance, and resistance values ​​of the second matching module 12, the resonant frequency of the third segment DE is adjusted, thereby adjusting the NR band in the third NR antenna mode.

[0106] As an optional implementation method, such as Figures 7a to 8b As shown, the antenna module provided in this embodiment of the application further includes: a connector 13;

[0107] A first insulating layer 101 is filled between the first part C and the first coupling member 2;

[0108] The first end of the connector 13 is electrically connected to the first coupling member 2, and the second end of the connector 13 is grounded.

[0109] In some embodiments, the first insulating layer 101 in this application may be a capacitor dielectric substrate layer.

[0110] In some embodiments, the first end of the connector 13 may abut or be welded to the first coupling member 2, and the second end of the connector 13 may abut or be welded to the ground terminal on the motherboard, without specific limitations.

[0111] In this embodiment, the first part C and the first coupling member 2 respectively constitute the two plates of the first coupling capacitor 20, and the first insulating layer 101 is filled between the two plates, which can make the structure of the first coupling capacitor 20 more stable. In addition, the grounding structure of the first coupling member 2 can be realized through the connector 13.

[0112] As an optional implementation method, such as Figures 7a to 8b As shown, the antenna module provided in this application embodiment further includes at least one of a second insulating layer 102 and a third insulating layer 103;

[0113] The second insulating layer 102 covers the side of the first part C facing away from the first coupling member 2, and the third insulating layer 103 covers the side of the first coupling member 2 facing away from the first part C. The third insulating layer 103 has a first through hole 131 so that the first end of the connector 13 passes through the first through hole 131 and is electrically connected to the first coupling member 2.

[0114] In some embodiments, the second insulating layer 102 and the third insulating layer 103 in the present application embodiments may be ink layers.

[0115] In this embodiment, covering at least one outer surface of the first coupling capacitor 20 with an insulating layer can improve the insulation performance of the outer surface of the first coupling capacitor 20 and prevent the outer surface of the first coupling capacitor 20 from contacting the electrical structure and affecting the operation of the first coupling capacitor 20 or other electrical structures.

[0116] As an optional implementation method, such as Figures 7a to 8b As shown, the antenna module provided in this embodiment further includes: a ferrite layer 14;

[0117] The ferrite layer 14 is disposed on the side of the first coupling member 2 facing away from the first portion C, and a third through hole 133 is formed on the ferrite layer 14. The first end of the connector 13 passes through the third through hole 133 and is electrically connected to the first coupling member 2; or,

[0118] The ferrite layer 14 is sandwiched between the first part C and the first coupling member 2. The first coupling member 2 is provided with a boss 21, and the ferrite layer 14 is provided with a second through hole 132. The boss 21 is received in the second through hole 132.

[0119] In one implementation, such as Figure 7a and Figure 7b As shown, the ferrite layer 14 is disposed on the side of the first coupling member 2 facing away from the first part C, and a third through hole 133 is provided on the ferrite layer 14. The first end of the connector 13 passes through the third through hole 133 and is electrically connected to the first coupling member 2.

[0120] In this way, the ferrite layer 14 can shield the interference of the metal parts on the side of the first coupling member 2 facing away from the first part C to the NFC antenna, such as shielding the interference of the motherboard and other metal structures on the side of the first coupling member 2 facing away from the first part C to the NFC antenna.

[0121] In some embodiments, the second end of the connector 13 can be electrically connected to the ground terminal on the motherboard 15 to ground the second end of the connector 13. In this case, since the motherboard 15 and the first coupling member 2 are located on opposite sides of the ferrite layer 14, in order to electrically connect the first coupling member 2 to the ground terminal on the motherboard 15, the second end of the connector 13 can be soldered to the ground terminal on the motherboard 15, and a third through hole 133 is opened on the ferrite layer 14 so that the first end of the connector 13 can make electrical contact with the first coupling member 2.

[0122] In another implementation, such as Figure 8a and Figure 8b As shown, the ferrite layer 14 is sandwiched between the first part C and the first coupling member 2. The first coupling member 2 is provided with a boss 21, and the ferrite layer 14 is provided with a second through hole 132. The boss 21 is received in the second through hole 132.

[0123] In some implementations, the first coupling element 2 can reuse the metal bracket of the motherboard 15, which simplifies the structural complexity of the antenna module in this application embodiment compared to adding an additional first coupling element 2.

[0124] In some embodiments, the boss 21 is housed within the second through hole 132, or the boss 21 may pass through the second through hole 132 so that the surface of the boss 21 facing the first portion C contacts the first insulating layer 101.

[0125] In this way, when the ferrite layer 14 is sandwiched between the first part C and the first coupling member 2, the distance between the first part C and the first coupling member 2 is increased. By opening a second through hole 132 on the ferrite layer 14, setting a boss 21 on the first coupling member 2, and housing the boss 21 in the second through hole 132, the distance between the boss 21 and the first part C can be reduced, so that the distance between the first part C and the first coupling member 2 is kept close enough to achieve strong coupling between the first part C and the first coupling member 2. This achieves the effect that LB noise signals and NR signals can be coupled to ground from the first part C, and NFC signals can be isolated.

[0126] In some implementations, such as Figure 7a and Figure 7b In the antenna module shown, the first radiator AE and the first coupler 2 can be processed using a double-panel (the first radiator AE can be processed with double metal) to form a double metal layer. In this way, one metal layer serves as the first radiator AE, and the other metal layer serves as the first coupler 2.

[0127] In some implementations, such as Figure 8a and Figure 8b In the antenna module shown, the first radiator AE can be fabricated using a single-panel fabrication method to form a single-layer metal structure, and other metal layers can be used to construct the first coupler 2. For example, an additional metal layer can be added as the first coupler 2, or the motherboard bracket can be reused to construct the first coupler 2.

[0128] It should be noted that, in the above embodiments, the structure of the first coupling capacitor 20 is used as an example for illustration. Other coupling capacitors in the antenna module, such as the second coupling capacitor 50 and the third coupling capacitor 110, can also adopt similar structures, which will not be elaborated here.

[0129] In some embodiments, the ferrite layer 14 may be disposed in the operating area of ​​the NFC antenna on the first radiator AE, instead of in the operating area of ​​the NR antenna.

[0130] For example: for such Figure 2 and Figure 6a In the antenna module shown, the ferrite layer 14 is disposed on the side of the fourth segment CE of the first radiator AE facing the motherboard 15. The fourth segment CE is the segment on the first radiator AE located between the first portion C and the second end E of the first radiator AE. Thus, the ferrite layer 14 reduces interference from the metal structure on the motherboard 15 to the NFC antenna. Furthermore, the absence of a ferrite layer on the side of the first segment AC facing the motherboard 15 prevents the energy of the NR antenna from being absorbed by the ferrite, thus avoiding a reduction in NR antenna efficiency.

[0131] For example: for suchFigure 6b In the antenna module shown, the ferrite layer 14 is disposed on the side of the fifth segment CD on the first radiator AE facing the motherboard 15. The fifth segment CD is the segment on the first radiator AE located between the first part C and the fourth part D. Thus, the ferrite layer 14 reduces interference from the metal structure on the motherboard 15 to the NFC antenna. Furthermore, the absence of a ferrite layer on the side of the first segment AC and the third segment DE facing the motherboard 15 prevents the energy of the NR antenna from being absorbed by the ferrite, thus avoiding a reduction in NR antenna efficiency.

[0132] In this embodiment, the NR antenna and the NFC antenna share a first feed and a first radiator. The NR antenna is coupled to a first portion of the first radiator via a first coupling element, forming a first coupling capacitor. This allows the NR signal to be grounded through the first coupling capacitor, thus achieving NR antenna mode between the first end and the first portion of the first radiator. The NFC signal, however, cannot be grounded through the first coupling capacitor; instead, it is grounded through the second end of the first radiator, achieving NFC antenna mode between the first end and the second end of the first radiator. By sharing a radiator, this embodiment ensures that the overall length of the first radiator does not conflict with the layout space of the NR antenna, providing sufficient routing space for the NFC antenna while maintaining the antenna performance of the NR antenna.

[0133] This application also provides an electronic device, which includes the antenna module provided in the foregoing embodiments of this application.

[0134] In this embodiment of the application, by setting the antenna pattern of this embodiment on the electronic device, the antenna layout space occupied by the NR antenna and NFC antenna on the electronic device can be reduced, and the antenna layout space conflict between the NR antenna and the NFC antenna can be avoided. This can provide sufficient routing space for the NFC antenna and ensure the antenna performance of the NR antenna.

[0135] It should be noted that the electronic device provided in this application embodiment can be a terminal, or it can be any other device besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the scope.

[0136] In some implementations, such as Figure 3 As shown, the electronic device provided in this application embodiment also includes a rear camera 30, and the metal ring 3 is a metal decorative ring surrounding the rear camera 30.

[0137] It should be noted that the metal decorative ring around the rear camera 30 is a closed metal ring with a circumference of approximately 200mm. It is not suitable for high-frequency (frequency greater than 1.7GHz) antennas because high-frequency antennas are prone to exciting higher-order modes on the metal decorative ring, leading to low antenna efficiency. Furthermore, the numerous scattered metal structures beneath the metal decorative ring of the rear camera 30 can easily couple high-frequency clutter, affecting antenna efficiency. Therefore, the metal decorative ring of the rear camera 30 is more suitable for designing low-frequency (such as LTE B5 / 8 / 28 LB band) antennas.

[0138] In this embodiment, the metal decorative ring of the rear camera 30 on the electronic device can be reused as the radiator of the LB antenna, which can improve the problem of insufficient space for LB antenna layout in electronic devices.

[0139] It is worth mentioning that the LB antenna in the relevant technology has the drawback of insufficient design space, which is explained as follows: the layout space of electronic devices such as mobile phones is compact, and many antennas need to find new antenna layout space. In particular, the LB occupies a lot of space. In addition, the popular four-LB antenna scheme requires even more layout space to design the LB antenna, making it difficult to implement the LB antenna design on the metal frame of electronic devices.

[0140] In this embodiment, the metal ring 3 on the electronic device can be reused as the radiator of the LB antenna, which can improve the problem of insufficient space for LB antenna layout on the metal frame of the electronic device.

[0141] In some implementations, such as Figure 3 As shown, the first radiator AE has a U-shaped structure, with the open end of the U-shaped structure facing the metal ring 3, so that the metal ring 3 is partially housed within the U-shaped groove formed by the U-shaped structure. At this time, the distance between the first radiator AE and the metal ring 3 is relatively close, which may couple LB antenna clutter onto the first radiator AE, affecting LB efficiency. To address this, the first coupling capacitor 20 can be used to ground the LB clutter on the first radiator AE at the first part C, thereby disrupting the LB clutter pattern on the first radiator AE and achieving the function of de-LB cluttering the first radiator AE.

[0142] In some implementations, such as Figure 3 As shown, the metal decorative ring includes a first metal ring 301 and a second metal ring 302. The first metal ring 301 and the second metal ring 302 are coaxial. The first metal ring 301 and the second metal ring 302 are distributed along the thickness direction of the electronic device, and the first metal ring 301 protrudes from the back cover 300 of the electronic device relative to the second metal ring 302.

[0143] The second part 31 and the fifth part (such as the first current antinode 32 and the second current antinode 33) are both located on the second metal ring 302.

[0144] In this embodiment, the metal decorative ring includes a first metal ring 301 and a second metal ring 302 distributed along the thickness direction of the electronic device. By setting the second part 31 and the fifth part (32 and 33) on the second metal ring 302 near the center of the electronic device, the length of the power supply and grounding lines can be shortened and the line loss can be reduced.

[0145] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0146] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An antenna module, characterized in that, include: A first radiator, a first feed source, and a first coupling element; The first coupling element is coupled to a first part of the first radiator to form a first coupling capacitor. The first coupling element is grounded, and the first part is located between the first end and the second end of the first radiator. The first end of the first radiator is electrically connected to the first feed source, and the second end of the first radiator is grounded; The operating frequency bands of the first feed source include the Near Field Communication (NFC) band and the New Radio (NR) band; The antenna module includes a first operating mode and a second operating mode; In the first operating mode, the NFC excitation signal provided by the first feed source is grounded through the second end of the first radiator to realize the NFC antenna mode; In the second operating mode, the NR excitation signal provided by the first feed source is grounded through the first coupling capacitor to realize the first NR antenna mode.

2. The antenna module according to claim 1, characterized in that, Also includes: Metal ring and second feed source; The second feed source operates in the low-frequency (LB) band, and the second feed source is electrically connected to the second part of the metal ring. The first radiator is disposed on one side of the metal ring and is spaced apart from the metal ring; The fifth part of the metal ring is grounded, and the difference between the length of the first segment of the metal ring and λ / 4 is greater than 0 and less than or equal to a preset value, wherein λ is the wavelength corresponding to the working frequency band of the second feed source.

3. The antenna module according to claim 2, characterized in that, The first location is at the wave node of the LB clutter current coupled on the first radiator.

4. The antenna module according to claim 1, characterized in that, The capacitance value of the first coupling capacitor is between 0.5pF and 150pF.

5. The antenna module according to any one of claims 1 to 4, characterized in that, Also includes: The second coupling element and the first matching module; The second coupling element is coupled to the third part of the first radiator to form a second coupling capacitor. The second coupling element is grounded through the first matching module. The third part is located between the first part and the first end of the first radiator. The antenna module further includes a third operating mode, wherein the first matching module is used to adjust the antenna module to be in the second operating mode or the third operating mode; In the third operating mode, the NR excitation signal provided by the first feed source is grounded through the second coupling capacitor and the first matching module to realize the second NR antenna mode.

6. The antenna module according to any one of claims 1 to 4, characterized in that, Also includes: Third feed, capacitor, inductor and third coupling element; The third feed source is electrically connected to the second end of the first radiator through the capacitor, and the second end of the first radiator is grounded through the inductor; The third coupling element is coupled to the fourth part of the first radiator to form a third coupling capacitor. The third coupling element is grounded, and the fourth part is located between the second end of the first radiator and the first part. The operating frequency band of the third feed source includes the second NR frequency band, and the antenna module also includes a fourth operating mode; In the fourth operating mode, the NR excitation signal provided by the third feed source is grounded through the third coupling capacitor to realize the third NR antenna mode.

7. The antenna module according to claim 6, characterized in that, Also includes: Second matching module; The third coupling element is grounded through the second matching module; The second matching module is used to adjust the NR band switching of the antenna module in the third NR antenna mode.

8. The antenna module according to any one of claims 1 to 4, characterized in that, Also includes: Connectors; A first insulating layer is filled between the first part and the first coupling member; The first end of the connector is electrically connected to the first coupling member, and the second end of the connector is grounded.

9. The antenna module according to claim 8, characterized in that, Also includes: At least one of the second insulating layer and the third insulating layer; The second insulating layer covers the side of the first part facing away from the first coupling member, and the third insulating layer covers the side of the first coupling member facing away from the first part. A first through hole is provided on the third insulating layer so that the first end of the connector passes through the first through hole and is electrically connected to the first coupling member.

10. The antenna module according to claim 8, characterized in that, Also includes: Ferrite layer; The ferrite layer is disposed on the side of the first coupling member facing away from the first portion, and a third through hole is formed on the ferrite layer. The first end of the connector passes through the third through hole and is electrically connected to the first coupling member; or, The ferrite layer is sandwiched between the first part and the first coupling member. The first coupling member is provided with a boss, and the ferrite layer is provided with a second through hole. The boss is received in the second through hole.

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

12. The electronic device according to claim 11, characterized in that, The electronic device also includes a rear camera, and the antenna module includes a metal ring, which is a decorative metal ring surrounding the rear camera.

13. The electronic device according to claim 12, characterized in that, The metal decorative ring includes a first metal ring and a second metal ring. The first metal ring and the second metal ring are coaxial and distributed along the thickness direction of the electronic device. The first metal ring protrudes from the back cover of the electronic device relative to the second metal ring. The second and fifth portions of the metal decorative ring are both located on the second metal ring.

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