CN214477890U - Antenna module and electronic device - Google Patents

Abstract

The application provides an antenna module, including irradiator, metalwork and ferrite, the irradiator is made by conducting material, the metalwork with the irradiator interval sets up, just the metalwork shields the part the irradiator, the ferrite set up in the irradiator dorsad one side of metalwork. The antenna module is suitable for a metal shell and can effectively maintain the antenna characteristics. The application also provides an electronic device with the antenna module.

Description

Antenna module and electronic device

Technical Field

The present application relates to the field of communications technologies, and in particular, to an antenna module and an electronic device.

Background

Near Field Communication (NFC) technology is used for Communication by means of magnetic coupling, mainly for short-range (e.g. within 10 cm) Communication, and its operating frequency is 13.56 MHz. The operating modes of NFC technology can be divided into active mode (card reader), passive mode (card mode), and peer-to-peer mode (data transmission).

At present, the NFC technology is widely used for mobile payment, which can greatly reduce the number of cards to be carried when going out. For example, functions such as mobile payment, identity authentication, traffic card recharging, traffic card balance inquiry, data transmission, application program sharing and the like can be realized through NFC. The NFC Tag (Tag) may also be used in consumer electronics applications, such as speakers, bracelets, and the like. Compared with Bluetooth, NFC has the advantages of rapid pairing, the establishment time is less than 0.1 second, and the cost is low.

However, nowadays, consumer electronics are required to be beautiful and light and thin, which compresses the placement space of the NFC antenna. In addition, when the NFC antenna is reduced in size and the surrounding severe metal environment, such as a metal housing used in a product, degrades the characteristics of the NFC antenna.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an antenna module and an electronic device suitable for a metal housing and capable of maintaining antenna characteristics.

In a first aspect, the present application provides an antenna module, the antenna module includes a radiator, a metal part and a ferrite, the radiator is made of a conductive material, the metal part is arranged at an interval with the radiator, the metal part shields a portion of the radiator, and the ferrite is arranged on one side of the radiator facing away from the radiator. As such, the antenna module can be adapted to a metal ID consumer electronic product, and shields a partial area of the radiator with a metal plane (e.g., a metal piece). Therefore, the metal plane can be regarded as a part of a radiator, and the communication distance and the range of the antenna module are further effectively enhanced. In addition, the ferrite is arranged to realize magnetic conduction, so that the interference of a metal part on one side (such as the rear side) of the radiator is effectively prevented or reduced.

In a possible design, the radiator includes a radiation portion and a substrate, the radiation portion is a coil, the radiation portion is disposed on the substrate and forms a near field communication antenna with the substrate, and the metal member shields a portion of the radiation portion. In the design, the radiation part and the substrate are arranged, and the radiation part is a coil, so that the radiation body forms a near field communication antenna. Of course, the radiator may also be other types of near field communication antennas.

In a possible design, the metal component includes a first surface, a second surface, and a sidewall, the first surface and the second surface are disposed opposite to each other, the sidewall is perpendicularly connected to peripheries of the first surface and the second surface, the first surface faces the radiation portion, and covers a portion of the radiation portion, when the radiation portion generates a current in a preset direction, a first current of a portion of the radiation portion shielded by the metal component is coupled to the first surface to generate a second current, the second current flows through the sidewall and is reversed on the second surface to form a third current in the same direction as the first current, and the third current generates a corresponding magnetic field, thereby increasing an induction distance and an induction range of the radiation portion. In the design, the metal piece shields part of the radiation part, so that the metal piece can generate current in the same direction as the radiation body, and the metal piece with a larger area can be used as an amplifier (passive) to effectively increase the induction distance and the induction range.

In one possible design, the metal piece shields one side edge of the radiator. In the design, the metal piece shields part of the radiation part, so that the metal piece can generate current in the same direction as the radiation body, and the metal piece with a larger area can be used as an amplifier (passive) to effectively increase the induction distance and the induction range.

In a possible design, the metal part further includes an extension portion, and the extension portion is disposed on an edge of one side of the metal part and is used for shielding other areas of the radiator. In the design, the metal piece can cover different areas of the radiator by arranging the extension part, so that the direction of the communication distance needing to be enhanced is adjusted.

In one possible design, the portion of the radiator not shielded by the metal piece is exposed. In the design, the metal piece can generate current in the same direction as the radiating body only by ensuring that the metal piece shields part of the radiating part, so that the metal piece with a larger area can be used as an amplifier (passive) to effectively increase the sensing distance and the sensing range.

In one possible design, the portion of the radiator not shielded by the metal member is shielded by an insulating member. In the design, the metal piece can generate current in the same direction as the radiating body only by ensuring that the metal piece shields part of the radiating part, so that the metal piece with a larger area can be used as an amplifier (passive) to effectively increase the sensing distance and the sensing range.

In one possible embodiment, the metal part is a housing part of the electronic device, which is made of a metal material. In the design, the metal piece can be a shell part of the electronic equipment, so that the antenna module is suitable for a metal ID consumer electronic product, has attractive appearance, meets the requirement of metal ID, and can effectively keep the functionality of the antenna module. Namely, compared with the common antenna, the size of the antenna is smaller, and the performance close to or even equal to that of the large-size antenna can be kept under the small-size antenna.

In one possible design, the metal member is a housing portion of an electronic device, the insulating member is a base portion of the electronic device, the housing portion is made of a metal material, the base portion is made of an insulating material, and the housing portion and the base portion together house the radiator and the ferrite. In the design, the metal piece can be a shell part of the electronic equipment, so that the antenna module is suitable for a metal ID consumer electronic product, has attractive appearance, meets the requirement of metal ID, and can effectively keep the functionality of the antenna module. Namely, compared with the common antenna, the size of the antenna is smaller, and the performance close to or even equal to that of the large-size antenna can be kept under the small-size antenna. In addition, a portion of the radiator not shielded by the metal member may be shielded by an insulating member.

In a second aspect, the present application provides an electronic device comprising an antenna module as described in the first aspect and possible designs thereof.

In one possible design, the electronic device includes a housing including a base portion made of an insulating material and a housing portion made of a metal material, the housing portion and the base portion together housing the radiator and the ferrite, the housing portion constituting the metal member, and the base portion shielding a remaining portion of the radiator.

In a possible design, the number of the housing portions is two, the base portion is disposed between the two housing portions, so that the two housing portions are insulated from each other, the upper and lower portions of the radiator are shielded by the two housing portions, and the middle portion of the radiator is shielded by the base portion.

In one possible design, the radiator is disposed within the housing and is disposed parallel to an inner wall of the housing.

In a third aspect, the present application provides an electronic device including a housing, a radiator and a ferrite, wherein the housing includes a base portion and a housing portion, the base portion is made of an insulating material, the housing portion is made of a metal material, the radiator and the ferrite are accommodated in the housing portion together with the base portion, the radiator is disposed in the housing and is disposed parallel to an inner wall of the housing, the ferrite is disposed on one side of the radiator, and the radiator, the housing portion and the ferrite constitute an antenna module as described in the first aspect and possible designs thereof.

In a possible design, the number of the housing portions is two, the base portion is disposed between the two housing portions, so that the two housing portions are insulated from each other, the upper and lower portions of the radiator are shielded by the two housing portions, and the middle portion of the radiator is shielded by the base portion.

For technical effects brought by the second aspect and the third aspect, reference may be made to the description related to the antenna module in the first aspect, and details are not repeated herein.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1a and 1b are schematic diagrams illustrating a conventional NFC antenna applied to a metal housing;

fig. 2a and fig. 2b are schematic diagrams of an antenna module according to an embodiment of the present disclosure;

fig. 3a, fig. 3b and fig. 3c are schematic current distribution diagrams of the antenna module according to the embodiment of the present application;

fig. 4a and 4b are schematic diagrams illustrating magnetic field (H-field) distributions of the antenna module in a first direction and a second direction, respectively, according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of another antenna module provided in an embodiment of the present application;

fig. 6a and fig. 6b are schematic diagrams illustrating magnetic field (H-field) distributions of another antenna module in a first direction and a second direction, respectively, according to an embodiment of the present disclosure;

fig. 7a and 7b are schematic views illustrating an antenna module applied to an electronic device according to an embodiment of the present disclosure;

fig. 8a and 8b are schematic diagrams illustrating an antenna module applied to another electronic device according to an embodiment of the present disclosure;

FIGS. 9a and 9b are schematic diagrams illustrating magnetic field (H-field) distributions of two electronic devices according to embodiments of the present disclosure in predetermined directions;

FIGS. 10a, 10b and 10c are schematic diagrams of two electronic devices respectively disposed on a predetermined plane and a magnetic field (H-field) distribution according to an embodiment of the present invention;

fig. 11 is a schematic diagram of an induction coil disposed on an electronic device according to an embodiment of the present application;

FIG. 12 is a graph illustrating the coupling between an electronic device and an induction coil provided by an embodiment of the present application when the induction coil is placed;

fig. 13a, fig. 13b, fig. 13c and fig. 13d are schematic diagrams illustrating magnetic field (H-field) distributions of two electronic devices according to the present invention when the induction coil is tilted and laid flat, respectively.

Description of the main elements

Antenna module	100，100a
		Radiating body
	11
		Radiation part	111
Substrate	112
		Metal part	13
First surface	131
		Second surface	132
Side wall	133
		Extension part	135
Ferrite	14
		Electronic device	200，200a
Shell body	21，21a
		Base body part	211
Casing body	212
		Induction coil	300
Metal outer cover	2
		Coil	31
Coil opening	CW
		Slotted hole	CA
Thin seam	SL

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the present embodiment, "at least one" means one or more, and a plurality means two or more. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It should be understood that in this application, "/" means "or" means "unless otherwise indicated. For example, A/B may represent A or B. In the present application, "a and/or B" is only one kind of association relation describing an associated object, and means that there may be three relations of only a, only B, and a and B.

It should be noted that in the embodiments of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or order. The features defined as "first", "second" may explicitly or implicitly include one or more of the features described. In the description of the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

It should be noted that, in the embodiments of the present application, the term "height" refers to a projected length in a direction perpendicular to the reference formation. The terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application.

Near Field Communication (NFC) technology is used for Communication by means of magnetic coupling, mainly for short-range (e.g. within 10 cm) Communication, and its operating frequency is 13.56 MHz. The operating modes of NFC technology can be divided into active mode (card reader), passive mode (card mode), and peer-to-peer mode (data transmission).

At present, the NFC technology is widely used for mobile payment, which greatly reduces the number of cards to be carried when going out. For example, functions such as mobile payment, identity authentication, traffic card recharging, traffic card balance inquiry, data transmission, application program sharing and the like can be realized through NFC. The NFC Tag (Tag) may also be used in consumer electronics applications, such as speakers, bracelets, and the like. Compared with Bluetooth, NFC has the advantages of rapid pairing, the establishment time is less than 0.1 second, and the cost is low.

In addition, since consumer electronics products require a metal ID to design the appearance of the product in order to improve the quality of the product. And NFC is near field magnetic coupling communication, if metal is covered above or around an NFC antenna, a reverse induced current (Eddy current) is generated on the metal surface, and the Eddy current cancels the magnetic field of the NFC antenna, so that the performance of the NFC antenna is reduced, the reading distance of the NFC antenna is sharply reduced, and therefore the difficulty in designing the NFC antenna on a metal ID is increased.

Referring to fig. 1a and fig. 1b together, in one embodiment, when the NFC antenna is applied to a metal structure (e.g. a metal housing 2), a slotted hole is usually used to make an induced current of the NFC antenna (e.g. a coil 31, the coil 31 includes a coil opening CW) on a metal surface be in the same direction as the NFC antenna, so as to maintain or enhance the near-field coupling of the NFC antenna. However, as shown in the drawings, the design must open an additional vertical slit SL to the metal edge on the basis of the metal slot CA, which will destroy the original metal structure, and further needs to be filled with plastic to maintain strength and beauty, and cannot meet the current demand of continuously sewing metal ID. That is, there are many limitations on the design of the NFC antenna in the metal ID, and the surrounding metal environment is likely to affect the performance of the NFC antenna.

Therefore, the present application provides an antenna module. The antenna module comprises a radiating body, a metal piece and a ferrite, wherein the radiating body is made of a conductive material, the metal piece and the radiating body are arranged at intervals, part of the radiating body is shielded by the metal piece, and the ferrite is arranged on one side, back to the metal piece, of the radiating body. As such, the antenna module can be adapted to a metal ID consumer electronic product, and shields a partial area of the radiator with a metal plane (e.g., a metal piece). Therefore, the metal plane can be regarded as a part of a radiator, and the communication distance and the range of the antenna module are further effectively enhanced. In addition, the ferrite is arranged to realize magnetic conduction, so that the interference of a metal part on one side (such as the rear side) of the radiator is effectively prevented or reduced.

Specifically, referring to fig. 2a and fig. 2b, an embodiment of the present invention provides an antenna module 100. Fig. 2a is an exploded schematic view of the antenna module 100. Fig. 2b is a schematic view (e.g., a top view) of the antenna module 100 at another angle. The antenna module 100 includes a radiator 11, a metal member 13, and a ferrite (ferrite) 14.

The radiator 11 includes a radiation portion 111 and a substrate 112. The radiating portion 111 is a coil. The radiation part 111 may have various widths, numbers of turns, and gaps (spaces between turns). The number of windings (turns) of the radiation portion 111 is determined by a required inductance. If the number of turns is one, the radiation portion 111 is an annular coil conductor. The radiation portion 111 may be made of a conductive material such as copper or other metal. The radiation portion 111 is disposed on the substrate 112, and forms an NFC antenna, i.e., an antenna with an operating frequency of 13.56MHz, with the substrate 112. The radiating section 111 supports NFC antenna operation in an active mode, a passive mode, and a point-to-point mode. In an embodiment of the present application, the size of the NFC antenna is about 25 x 10 mm.

The substrate 112 may be in the form of a Flexible Printed Circuit (FPC), a hard board, a Liquid Crystal Polymer (LCP), and the like, which is not limited herein. The substrate 112 may be provided with an NFC module, a feeding point, a grounding point, etc. for supporting the radiation portion 111 and providing signal feeding and grounding functions for the radiation portion 111. The NFC module generally includes a high-speed single chip, a radio frequency chip, a matching circuit, and the like, where the matching circuit is used to adjust the operating frequency of the NFC antenna.

Of course, in the embodiment of the present application, a specific structure of the NFC antenna is not limited, and the NFC antenna may also be another type of NFC antenna.

The metal member 13 is made of a conductive material such as metal. The metal member 13 includes a first surface 131, a second surface 132 and a sidewall 133. The first surface 131 is disposed opposite to the second surface 132. The sidewall 133 vertically connects the peripheries of the first surface 131 and the second surface 132. The first surface 131 is disposed toward the radiation part 111. In the embodiment of the present application, the metal piece 13 is disposed at an interval from the radiation portion 111, and the first surface 131 of the metal piece 13 partially covers the radiation portion 111. That is, the metal piece 13 overlaps with the projection of the radiation part 111 on a plane (e.g., the Y-Z plane shown in the figure) (see fig. 2 b).

It can be understood that, in the embodiment of the present application, the inner surface (i.e., the first surface 131) of the metal piece 13 is proximate to the edge of the radiation portion 111 and is spaced apart from the edge (i.e., electrically disconnected). In one embodiment, the distance between the metal piece 13 and the radiation part 111 is 50 um. Of course, in the embodiment of the present application, the gap (or distance) between the metal piece 13 and the radiation portion 111 is not limited, and it is only necessary to ensure that the two are spaced apart (i.e., there is no electrical connection).

In the embodiment of the present application, the first surface 131 of the metal piece 13 shields one side edge of the radiation part 111, that is, one side edge of the first surface 131 of the metal piece 13 and the coil of one side edge of the radiation part 111 are flush with each other. Of course, in the embodiment of the present application, the area, and the like of the metal piece 13 shielding the radiation portion 111 are not limited, and may be specifically adjusted according to actual situations.

The ferrite 14 is disposed on a side of the substrate 112 away from the radiation portion 111. The ferrite 14 mainly functions as a magnetic conductor to prevent or reduce interference of a metal member on one side (e.g., a rear side) of the radiation portion 111.

Referring to fig. 3a, fig. 3b and fig. 3c, the current distribution of the antenna module 100 is shown. Obviously, when the radiation part 111 is partially shielded by the metal piece 13, the radiation part 111 generates a current I1 (see fig. 3a) with a preset direction (e.g. counterclockwise). The current of the portion of the radiation portion 111 shielded by the metal piece 13 is the first current I11. Since the metal piece 13 is spaced apart from the radiation part 111, the first current I11 of the portion of the radiation part 111 shielded by the metal piece 13 is coupled to the first surface 131 of the metal piece 13 (i.e. the surface facing the radiator 11) to generate an induced current (i.e. the second current I2, see fig. 3b and 3 c). The second current I2 is an eddy current, and due to the closed loop characteristic of the eddy current, the second current I2 will flow through the sidewall 133 of the metal piece 13 and reverse at the second surface 132 of the metal piece 13 (i.e., the surface facing away from the radiation portion 111), thereby forming a third current I21 in the same direction as the first current I11. The third current I21 is in the same direction as the first current I11, so that the magnetic field generated by the third current I21 does not cancel the magnetic field of the NFC antenna (i.e., the radiator 11), but rather, because of the same direction relationship, the metal piece 13 can be a part of the NFC antenna, and the metal piece 13 with a larger area can be used as an amplifier (passive), thereby increasing the sensing distance and the sensing range.

Specifically, please refer to fig. 4a and 4b, which are schematic diagrams illustrating the distribution of the magnetic field (H-field) of the antenna module 100 in a first direction (e.g., Z direction) and a second direction (e.g., Y direction), respectively. Obviously, by disposing the metal piece 13 and making the metal piece 13 partially shield the radiation part 111, a current in the same direction as the radiation part 111 is formed on the surface of the metal piece 13. In this way, the metal piece 13 may be used as a part of an NFC antenna and generate a corresponding magnetic field, thereby increasing the sensing distance and the sensing range. For example, the sensing distance in the Y direction and the Z direction can be effectively increased, and the sensing range/angle can be effectively increased.

It is understood that in other embodiments, different areas of the radiator 11 can be covered by the metal piece 13, so as to adjust the direction in which the communication distance needs to be enhanced. For example, please refer to fig. 5, which is a schematic diagram of another antenna module 100a according to an embodiment of the present disclosure. The antenna module 100a has a structure similar to that of the antenna module 100, i.e., includes at least a radiator 11, a metal piece 13 and a ferrite 14 (not shown). The antenna module 100a differs from the antenna module 100 in that the metal piece 13 is provided with an extension 135. In the embodiment of the present application, the number of the extensions 135 is two. The extending portions 135 are substantially rectangular, and are disposed at two ends of the same side of the metal member 13, and are disposed oppositely. The extension portion 135 is used to shield other areas of the radiator 11, so as to change and adjust the direction of the communication distance.

For example, referring to fig. 6a and fig. 6b, H-field diagrams of the antenna module 100 in a first direction and a second direction are shown, respectively. Obviously, by providing a corresponding extension 135 on one side of the metal piece 13, the magnetic field (H-field) in the Y-direction and in the Z-direction can be enhanced by the variation of the coverage area.

It is understood that in other embodiments, the portion of the antenna module 100/100a where the radiating portion 111 is not covered by the metal piece 13 may be directly exposed or covered by an insulating member (see the following detailed description).

It is understood that, referring to fig. 7a and 7b, the antenna module 100/100a can be applied to the electronic device 200. The electronic device 200 may be, but is not limited to, a smart phone, a tablet computer, a sound box, and the like. In the embodiment of the present application, the electronic device 200 is taken as a sound box for illustration.

The electronic device 200 at least includes a housing 21, the radiator 11 and the ferrite 14. The housing 21 is substantially cylindrical and includes a base portion 211 and a housing portion 212. The base portion 211 is made of an insulating material such as plastic, and has a substantially U-shaped cross section. The housing portion 212 is made of a metal material and has a substantially n-shaped cross-section. The housing 212 is provided on the base portion 211, and accommodates the radiator 11 and the ferrite 14 together with the base portion 211.

The radiator 11 and the ferrite 14 are both disposed in the housing 21. The radiator 11 is disposed toward the inner wall of the housing 21, and is substantially parallel to the inner wall of the housing 21 and disposed at an interval. The housing 212 constitutes the metal piece 13 in the antenna module 100, that is, the housing 212, and the radiator 11 and the ferrite 14 together constitute the antenna module 100. The housing portion 212 covers a portion of the radiator 11. The base portion 211 covers the remaining portion of the radiator 11. For example, the housing portion 212 covers the upper half of the radiator 11. The base portion 211 covers the lower half of the radiator 11. That is, in the present embodiment, the base portion 211 covers and shields the radiator 11 together with the housing portion 212. The ferrite 14 is disposed on a side of the radiator 11 away from the housing portion 212.

It is understood that the structure of the electronic device 200 is not limited to the above description in other embodiments, and may be other structures. For example, in one embodiment, the electronic device 200 can include two housing portions 212 and a base portion 211. The base portion 211 is provided between the two housing portions 212, so that the two housing portions 212 are insulated from each other. The upper and lower portions of the radiator 11 may be shielded by the two housing portions 212, and the middle portion may be shielded by the base portion 211. Alternatively, as described above, the upper and lower portions of the radiator 11 are shielded by only one of the housing portion 212 and the base portion 211.

It is to be understood that the illustrated structure of the embodiment of the present application does not specifically limit the electronic device 200. In other embodiments of the present application, the electronic device 200 may include more or fewer components than shown, or combine certain components, or split certain components, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

It can be understood that, in the embodiment of the present application, as described above, when the radiator 11 generates a current in a predetermined direction (e.g., counterclockwise), the current of the portion of the radiator 11 shielded by the metal piece 13 is coupled to the inner wall of the housing portion 212 to generate an induced current. Then, due to the closed loop characteristic of the eddy current, the induced current will flow through the outer wall of the housing 212, and further form a current in the same direction as the current of the portion shielded by the metal member 13. As such, the housing portion 212 may be used as a portion of the radiator 11 (i.e., NFC antenna), thereby increasing the sensing distance and the sensing range. For example, since the electronic device 200 is to realize forward sensing (i.e. the user does not need to take up the electronic device 200 for pairing), the NFC antenna is disposed on the inner side wall of the housing 21 of the electronic device 200, and the housing 212 partially shields the NFC antenna, so as to increase the magnetic field strength and the communication distance in the tangential direction of the NFC antenna (i.e. horizontal to the NFC antenna, in the Z-axis direction in the figure), thereby realizing forward sensing.

It should be understood that fig. 8a and 8b are schematic views of another electronic device 200 a. The electronic device 200a includes a housing 21a, a radiator 11, and a ferrite 14. The housing 21a is made of a plastic material. Thus, in the embodiment of the present application, the electronic device 200a is taken as a plastic housing, the housing 21 of the electronic device 200 includes a metal housing 212, and the other structures of the electronic devices 200 and 200a are the same as an example, so as to compare the change of the magnetic field (H-field) distribution of the electronic devices 200 and 200 a.

Fig. 9a is a schematic view of the magnetic field (H-field) distribution of the electronic device 200a along a predetermined direction (e.g., a-a' direction) (i.e., X-Z plane) in fig. 7 a. FIG. 9b is a schematic view of the magnetic field (H-field) distribution of the electronic device 200 along a predetermined direction (e.g., A-A' direction) (i.e., X-Z plane) in FIG. 7 a. Obviously, the stronger magnetic field of the electronic device 200a is perpendicular to the NFC antenna area, i.e. the normal field strength (i.e. X direction) is stronger and the tangential field strength (i.e. Z direction) is weaker. And the scheme that this application provided, promptly electronic equipment 200 passes through the mode that the NFC antenna couples to the metal plane (promptly casing part 212), has mainly strengthened the tangential magnetic field intensity of NFC antenna has increased tangential response area, and normal direction field intensity also is stronger than electronic equipment 200a, is equivalent to the planar response area of X-Z and increases, covers the angle and wider, and user experience is better.

Fig. 10a is a schematic view of the electronic device 200 along a predetermined plane (e.g., an X-Y plane). FIG. 10b is a diagram illustrating the magnetic field (H-field) distribution of the electronic apparatus 200a in the predetermined plane (e.g., X-Y plane). FIG. 10c is a diagram illustrating the magnetic field (H-field) distribution of the electronic apparatus 200 in the predetermined plane (e.g., X-Y plane). As is apparent from fig. 10b to 10c, the magnetic field of the electronic device 200 along the tangential direction (i.e., Z direction) of the NFC antenna (i.e., the radiator 11) is significantly improved, i.e., the communication distance of the electronic device horizontal to the NFC antenna is significantly increased.

Referring to fig. 11 and 12 together, fig. 11 is a schematic diagram illustrating an induction coil 300 disposed on the electronic device 200. Fig. 12 is a graph illustrating the coupling between the radiator 11 and the induction coil 300 when the induction coil 300 is placed on the electronic device 200/200 a. Wherein the size of the induction coil 300 is 36 x 50mm, and when the induction coil 300 is disposed perpendicular to the electronic device 200/200a (i.e., the induction coil 300 is rotated 0 degrees), the distance between the induction coil 300 and the electronic device 200/200a is 14.5 mm. When the induction coil 300 is disposed horizontally to the electronic device 200/200a (i.e., the induction coil 300 is rotated 90 degrees), the distance between the induction coil 300 and the electronic device 200/200a is 3.5 mm. In the embodiment of the present application, the angle of the induction coil 300 is rotated by one point (0-90 degrees) every 10 degrees, and the improvement of the induction range of the electronic device 200, 200a is compared by the change of the coupling between the two (for example, the change of the S21 parameter, the S21 corresponds to the coupling energy of different angles).

In fig. 12, a curve S121 is a coupling curve between the electronic device 200 and the induction coil 300. The curve S122 is a coupling curve between the electronic apparatus 200a and the induction coil 300. It is obvious from fig. 12 that, no matter whether the induction coil 300 is disposed perpendicular to the electronic device 200/200a (i.e. the induction coil 300 is rotated by 0 degree) or disposed horizontal to the electronic device 200/200a (i.e. the induction coil 300 is rotated by 90 degrees), the electronic device 200 performs better than the electronic device 200a at S21, for example, at least 8-10dB better. That is to say, the electronic device 200 in the embodiment of the present application can adapt to the metal ID design by providing the metal piece 13 (or the metal housing portion 212), and can effectively improve the sensing range and distance.

Referring to fig. 13a to 13d, fig. 13a is a schematic diagram of the distribution of the magnetic field (H-field) when the electronic device 200a is laid on the table and the induction coil 300 is placed above the electronic device 200a (for example, the induction coil 300 rotates 60 degrees). Fig. 13b is a schematic diagram of the distribution of the magnetic field (H-field) when the electronic device 200a is placed on a desktop and the induction coil 300 is placed above the electronic device 200a (e.g., the induction coil 300 is rotated 90 degrees). Fig. 13c is a schematic diagram of the distribution of the magnetic field (H-field) when the electronic device 200 is placed on a table and the induction coil 300 is placed above the electronic device 200a (e.g., the induction coil 300 rotates 60 degrees). Fig. 13d is a schematic diagram of the distribution of the magnetic field (H-field) when the electronic device 200 is placed on a desktop and the induction coil 300 is placed above the electronic device 200 (e.g., the induction coil 300 is rotated 90 degrees). As is apparent from fig. 13a to 13d, the magnetic coupling energy of the electronic device 200 in the embodiment of the present application is stronger than that of the conventional solution (i.e., the electronic device 200a) at the oblique upper side and right upper side of the electronic device 200/200a, so as to achieve the purpose of effectively increasing the upper sensing distance (i.e., the tangential direction of the NFC antenna).

In the antenna module 100, 100a of this embodiment of the application, a metal plane (for example, the metal piece 13) is used to shield a partial region (for example, an upper partial region) of the NFC antenna, the current is coupled to the inner current of the metal plane through the NFC antenna, so that the inner current that originally counteracts a magnetic field of the NFC antenna is caused, because the metal plane is an incomplete region that is shielded, the inner current is caused to form a closed loop, an inner current in the same direction as the current of the NFC antenna is formed in a reverse direction again, the inner current in the same direction that is generated on the metal plane generates a corresponding magnetic field, and the metal plane can be regarded as a part of the NFC antenna, so that a communication distance and a communication range are enhanced. Particularly, the tangential communication capacity of the NFC antenna can be effectively enhanced, so that the induction range of the NFC antenna is enlarged. In addition, the radiator 11 is applicable to a consumer electronic product with metal ID, has an aesthetic appearance, meets the requirement of metal ID, and can effectively maintain the functionality of the NFC antenna. Namely, compared with a general NFC antenna, the size of the antenna is smaller, and the performance of the small-size NFC antenna can be kept close to or even equal to that of a large-size antenna.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. Therefore, appropriate changes and modifications to the above embodiments are intended to be included within the scope of the present invention as claimed, and within the spirit and scope of the present invention.

Claims (15)

1. The antenna module is characterized by comprising a radiating body, a metal piece and a ferrite, wherein the radiating body is made of a conductive material, the metal piece and the radiating body are arranged at intervals, part of the radiating body is shielded by the metal piece, and the ferrite is arranged on one side, back to the metal piece, of the radiating body.

2. The antenna module of claim 1, wherein: the radiator comprises a radiation part and a substrate, the radiation part is a coil, the radiation part is arranged on the substrate and forms a near field communication antenna with the substrate, and the metal piece shields part of the radiation part.

3. The antenna module of claim 2, wherein: the metal piece comprises a first surface, a second surface and a side wall, the first surface and the second surface are arranged oppositely, the side wall is vertically connected with the peripheries of the first surface and the second surface, the first surface faces the radiation part and covers a part of the radiation part, when the radiation part generates current in a preset direction, the first current of the part, shielded by the metal piece, of the radiation part is coupled to the first surface to generate second current, the second current flows through the side wall and is reversed on the second surface to form third current in the same direction as the first current, and the third current generates a corresponding magnetic field to increase the induction distance and the induction range of the radiation part.

4. The antenna module of claim 1, wherein: the metal piece shields one side edge of the radiator.

5. The antenna module of claim 1, wherein: the metal piece further comprises an extension portion, and the extension portion is arranged on the edge of one side of the metal piece and used for shielding other areas of the radiating body.

6. The antenna module of claim 1, wherein: and exposing the part of the radiator which is not shielded by the metal piece.

7. The antenna module of claim 1, wherein: the part of the radiator which is not shielded by the metal piece is shielded by an insulating piece.

8. The antenna module of claim 1, wherein: the metal piece is a shell part of the electronic equipment, and the shell part is made of a metal material.

9. The antenna module of claim 7, wherein: the metal piece is a shell part of the electronic device, the insulating piece is a base body part of the electronic device, the shell part is made of metal materials, the base body part is made of insulating materials, and the shell part and the base body part jointly contain the radiator and the ferrite.

10. An electronic device, characterized in that: the electronic device comprising an antenna module according to any of claims 1-7.

11. The electronic device of claim 10, wherein: the electronic device includes a housing including a base portion made of an insulating material and a housing portion made of a metal material, the housing portion and the base portion together housing the radiator and ferrite, the housing portion constituting the metal member, and the base portion shielding a remaining portion of the radiator.

12. The electronic device of claim 11, wherein: the number of the shell parts is two, the base body part is arranged between the two shell parts, so that the two shell parts are arranged in an insulating mode, the upper portion and the lower portion of the radiating body are shielded by the two shell parts, and the middle portion of the radiating body is shielded by the base body part.

13. The electronic device of claim 11, wherein: the radiator set up in the casing, and with the inner wall parallel arrangement of casing portion.

14. An electronic device, characterized in that: the electronic device includes a housing, a radiator, and a ferrite, the housing includes a base portion made of an insulating material and a housing portion made of a metal material, the housing portion and the base portion together house the radiator and the ferrite, the radiator is disposed in the housing and is disposed parallel to an inner wall of the housing, the ferrite is disposed on one side of the radiator, and the radiator, the housing portion, and the ferrite constitute the antenna module according to any one of claims 1 to 7.

15. The electronic device of claim 14, wherein: the number of the shell parts is two, the base body part is arranged between the two shell parts, so that the two shell parts are arranged in an insulating mode, the upper portion and the lower portion of the radiating body are shielded by the two shell parts, and the middle portion of the radiating body is shielded by the base body part.

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