CN114566783A

CN114566783A - Antenna module and electronic device

Info

Publication number: CN114566783A
Application number: CN202011360817.1A
Authority: CN
Inventors: 马国忠; 孙乔; 屠东兴; 李堃; 呼延思雷
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2022-05-31
Anticipated expiration: 2040-11-27
Also published as: WO2022110951A1; CN114566783B

Abstract

The application provides an antenna module, which comprises a radiator and a feed-in part. The radiator is annular to form a cavity, and a gap is formed in the radiator. The slot penetrates from the top of one side wall of the radiator to the bottom of the radiator so as to divide the radiator into a first part and a second part which are arranged at intervals. One ends of the first part and the second part are arranged at intervals through the gap, and the other parts are connected together. The radiator is provided with a connection point, and the connection point is connected to the ground plate so as to provide grounding for the antenna module. The feed-in part and the radiator are arranged at intervals, and the projection of the feed-in part on a certain plane is partially overlapped with the projection of the gap on the plane. The feed-in part is used for coupling a feed signal to the slot. Obviously, the antenna module is not affected by the headroom and has good 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

With the continuous development of communication technology, more antennas need to be arranged in electronic devices such as mobile phones. For example, at least three independent Low frequency (LB) antennas are arranged on a mobile phone due to the requirement of EN-DC (NR eNB Dual Connection, i.e. Dual Connection (DC) of 4G eNB (E) and 5G NR (N)). The antenna design scheme in the industry at present is basically the layout of two low-frequency antennas, and the layout situations of a plurality of low-frequency antennas are fewer. And in the prior design, two LB antennas were typically placed at the bottom and top of the most headroom, most favorable high performance antenna design in the handset. Therefore, when more antennas need to be arranged, how to arrange the antennas, especially in a limited and harsh environment, how to design an LB antenna with good characteristics is a problem to be solved.

Disclosure of Invention

Accordingly, there is a need for an antenna module and an electronic device that are not affected by a clearance area and have good characteristics.

In a first aspect, the present application provides an antenna module. The antenna module comprises a radiator and a feed-in part. The radiator is annular to form a cavity, and a gap is formed in the radiator. The slot penetrates from the top of one side wall of the radiator to the bottom of the radiator so as to divide the radiator into a first part and a second part which are arranged at intervals. One ends of the first part and the second part are arranged at intervals through the gap, and the other parts are connected together. The radiator is provided with a connection point, and the connection point is connected to the ground plate so as to provide grounding for the antenna module. The feed-in part and the radiator are arranged at intervals, and the projection of the feed-in part on a certain plane is partially overlapped with the projection of the gap on the plane. The feed-in part is used for coupling a feed signal to the slot. Obviously, the antenna module is formed by providing an open slot on the radiator, and the slot divides the radiator into two parts which are not directly connected. Therefore, the antenna module does not need to be provided with a serial capacitor, and can obtain good resonance by utilizing the gap and the cavity, so that the antenna design is simpler, and the efficiency bandwidth of the antenna is greatly expanded. In addition, the feeding becomes easier to realize and stabilize in product implementation. The antenna module has a simple structure, can be arranged in a terminal device in a single or multiple way, has unlimited arrangement positions and very flexibility, and has performance not influenced by hand holding.

In one possible design, the radiator constitutes a resonant antenna, the radiator generates an inductance required for resonance through the cavity and a distributed capacitance through the slot, and the resonant frequency of the radiator is inversely proportional to the product of the distributed capacitance and the inductance. Obviously, in the design, the radiator can generate a larger distributed capacitance by using the slot, and the inductance required by resonance is generated by using the cavity, so that the antenna excites a good resonance in a corresponding frequency band, namely, a non-resonant antenna is transformed into a resonant antenna.

In one possible design, the cavity and the slot are filled with a medium, and the length of the cavity, the medium filled in the cavity and the length of the slot determine the resonant frequency of the radiator. Obviously, in the design, the radiator utilizes the gap can produce a great distributed capacitance, and utilize the required inductance of cavity production resonance for the antenna arouses a good resonance at corresponding frequency channel, reforms into resonant antenna with a non-resonant antenna promptly, just resonant antenna's resonant frequency by the length of cavity, the medium that fills in the cavity and the length of gap decides.

In a possible design, the ground plate covers an opening at one side of the cavity, a slot is further formed in the radiator, the slot is communicated with the slot, the connection points are formed at two ends of the slot, and the connection points are connected with the ground plate. Obviously, in the above design, the ground plate is provided to achieve effective grounding of the antenna module.

In one possible design, the ground plate is arranged in the cavity or in another position without covering the opening of the cavity and is connected to the connection point. Obviously, in the above design, the ground plate is provided to achieve effective grounding of the antenna module.

In one possible design, the antenna module further includes a tuning element, the slot straddles the tuning element, the feed, the first portion, the second portion, and/or the connection point is grounded through the tuning element, and the tuning element includes a switch, a variable capacitor, and/or a variable inductor. It is clear that in the design described, by providing the tuning element, an efficient adjustment of the frequency can be achieved.

In one possible design, the connection point is connected to the ground plane by a lumped or tuned device; or the connection point is directly connected to the ground plate; or the connection point is switched to the grounding plate through a connector; or the connection point is grounded in a non-contact manner with the grounding plate through a coupling capacitor. Obviously, in the design, the connection point is arranged and is used for grounding, so that the radiator is effectively grounded.

In one possible design, the feeding part is L-shaped and disposed in the cavity. Obviously, in the design, the feeding part is arranged in an L shape and arranged in the cavity, so that the feeding part has at least the following two advantages. First, when the antenna module is applied to an electronic device, a feeding point can be moved from a metal bezel of the electronic device to an inner metal wall, which is easy to implement. Secondly, the length of the feed-in part and the relative position of the feed-in part and the gap can be adjusted more flexibly, and the feed-in part and the gap can effectively help the matching of the input ports.

In a possible design, the antenna module further includes a radio frequency board disposed outside the cavity or inside the cavity, and the radio frequency board is electrically connected to the feeding portion for feeding an electrical signal to the feeding portion. Obviously, in the design, the radio frequency board is arranged to feed a signal to the feed-in part through the radio frequency board. The radio frequency board can be in the forms of a flexible circuit board, a hard board, a liquid crystal high polymer and the like. The rf board may be disposed in the cavity or disposed outside the cavity, and is not limited herein.

In one possible embodiment, the radiator is made of a metallic material or a material with electrical conductivity. Obviously, the material of the radiator is not limited in the design. The radiator can be made of metal materials, can also be a metal frame of electronic equipment, and can also be an in-mold decoration antenna, a flexible circuit board, laser direct forming, liquid crystal high polymer and other antenna forms.

In one possible design, the radiator is a metal bezel of the electronic device. Obviously, the material of the radiator is not limited in the design. The radiator can be made of metal materials, can also be a metal frame of electronic equipment, and can also be an in-mold decoration antenna, a flexible circuit board, laser direct forming, liquid crystal high polymer and other antenna forms.

In a possible design, the radiator is disposed in a housing of the electronic device, and is integrated with the housing in an in-mold injection molding manner. Obviously, the material of the radiator is not limited in the design. The radiator can be made of metal materials, can also be a metal frame of electronic equipment, and can also be an in-mold decoration antenna, a flexible circuit board, laser direct forming, liquid crystal high polymer and other antenna forms.

In a possible design, the antenna module further includes a carrier, the carrier is made of an insulating material, and the radiator is formed on the carrier by using a flexible circuit board, a laser direct structuring process, or a liquid crystal high molecular polymer. Obviously, the material of the radiator is not limited in the design. The radiator can be made of metal materials, can also be a metal frame of electronic equipment, and can also be an in-mold decoration antenna, a flexible circuit board, laser direct forming, liquid crystal high polymer and other antenna forms.

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 embodiment, the radiator is made of a metallic material or a material with electrical conductivity.

In one possible design, the electronic device includes a metal bezel, and the radiator is the metal bezel of the electronic device.

In a possible design, the electronic device further includes a casing, and the radiator is disposed in the casing and integrated with the casing in an in-mold injection molding manner.

In a possible design, the antenna module further includes a carrier, the carrier is made of an insulating material, and the radiator is formed on the carrier by using a flexible circuit board, a laser direct structuring process, or a liquid crystal high molecular polymer.

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

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. 1 is a diagram of a conventional electronic device with two low frequency (LB) antennas;

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

fig. 2d, fig. 2e and fig. 2f are schematic diagrams illustrating an antenna module according to an embodiment of the present invention connected to a ground plate;

fig. 3a, fig. 3b and fig. 3c are schematic diagrams of another antenna module according to an embodiment of the present disclosure;

fig. 4a and 4b are schematic views of another antenna module according to an embodiment of the present disclosure;

fig. 5a, fig. 5b and fig. 5c are schematic views of another antenna module according to an embodiment of the present disclosure;

fig. 6a, fig. 6b and fig. 6c are schematic views illustrating an antenna module applied to an electronic device according to an embodiment of the present disclosure;

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

FIG. 8 is a graph of S-parameters (scattering parameters) and isolation for three antennas in the electronic device of FIG. 7 a;

FIG. 9 is a schematic diagram of the current distribution of the antenna in the electronic device of FIG. 7 a;

FIG. 10 is a graph of ECC plots for three antennas in the electronic device of FIG. 7 a;

fig. 11a, 11b and 11c are schematic 3D directional diagrams of three antennas in the electronic device shown in fig. 7 a;

FIG. 12a, FIG. 12b and FIG. 12c are schematic diagrams illustrating simulation of the performance of the antenna in the electronic device shown in FIG. 7 a;

FIG. 13 is a simulation graph of the head-hand performance of the antenna 1 in the electronic device shown in FIG. 7 a;

fig. 14a and 14b are another schematic diagrams illustrating an application of the antenna module to an electronic device according to an embodiment of the present disclosure.

Description of the main elements

Antenna module 100 radiator 11 feed 12 cavity 111

The slot 113 connects the first portion P1 to the second portion P2 at a point 115

Ground plate 117 slot 118

Radio frequency board 15 tuning element 17 carrier 18 electronic device 200

Antenna

1, 2, 3, 4 side key 5 casing 21 frame 211 backplate 212

First frame portion 215, second frame portion 216, and third frame portion 217

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.

Fig. 1 is a schematic diagram of a conventional electronic device (e.g., a mobile phone) with two low frequency (LB) antennas. Two low frequency (LB) antennas (e.g., LB antenna 1 and LB antenna 2) are disposed at the bottom and top of the mobile phone, respectively, and a conventional low frequency antenna form is used, such as inverted-F antenna (IFA), LOOP (LOOP) antenna, and the like.

However, the size of the LB antenna is relatively large due to the limited size of the handset. When it is necessary to add an antenna (e.g. add an LB antenna to the dashed line in the left or right side of the handset), it means that the distance between the three LB antennas is greatly reduced. The reduction of the distance may deteriorate the performance of the LB antennas, such as isolation, Envelope Correlation Coefficient (ECC), and radiation efficiency. That is, the electronic devices such as the current mobile phones generally cannot support more than two low-frequency antenna layouts, and the influence of the hand holding is large, so that it is difficult to consider the state of one hand holding and the state of two hands holding.

Therefore, the present application provides an antenna module. The antenna module comprises a radiator and a feed-in part. The radiator is annular to form a cavity, and a gap is formed in the radiator. The slot penetrates from the top of one side wall of the radiator to the bottom of the radiator so as to divide the radiator into a first part and a second part which are arranged at intervals. One ends of the first part and the second part are arranged at intervals through the gap, and the other parts are connected together. The radiator is provided with a connection point, and the connection point is connected to the ground plate so as to provide grounding for the antenna module. The feed-in part and the radiator are arranged at intervals, and the projection of the feed-in part on a certain plane is partially overlapped with the projection of the gap on the plane. The feed-in part is used for coupling a feed signal to the slot. The antenna module is characterized in that a section of open gap is arranged on the radiator, and the radiator is divided into two parts which are not directly connected by the gap. Therefore, the antenna module does not need to be provided with a serial capacitor, and can obtain good resonance by utilizing the gap and the cavity to respectively generate corresponding distributed capacitors and inductors, so that the antenna design is simpler, and the efficiency bandwidth of the antenna is greatly expanded. In addition, the feeding becomes easier to realize and stabilize in product implementation. The antenna module has a simple structure, can be arranged in a terminal device in a single or multiple way, has unlimited arrangement positions and very flexibility, and has performance not influenced by hand holding.

Specifically, referring to fig. 2a, fig. 2b and fig. 2c, an antenna module 100 is provided in the present embodiment. Fig. 2a is a schematic perspective view of the antenna module 100. Fig. 2b is a schematic view (e.g., a side view) of the antenna module 100 at another angle. Fig. 2c is a schematic view (e.g., a top view) of the antenna module 100 at another angle.

Referring to fig. 2a, the antenna module 100 includes a radiator 11 and a feeding portion 12. In the embodiment of the present application, the radiator 11 is made of a conductive material such as metal. The radiator 11 is substantially annular, and a cavity 111 is formed therein. A slot 113 is formed on the sidewall of the radiator 11. The slot 113 penetrates from the top of one sidewall of the radiator 11 to the bottom of the radiator 11, so as to divide the radiator 11 into two parts, such as a first part P1 and a second part P2, which are disposed at intervals. One ends of the first and second portions P1 and P2 are spaced apart from each other by the gap 113, and the other portions are connected together.

In the embodiment of the present application, the slot 113 is opened at a position substantially in the middle of one of the side walls of the radiator 11. The slit 113 may be substantially zigzag-shaped. For example, referring to fig. 2b, the slot 113 may extend from the top of the radiator 11 to the bottom of the radiator 11 (e.g., the Z-axis direction) for a certain distance, then be bent at a right angle to extend along a direction parallel to the bottom of the radiator 11 (e.g., the Y-axis direction) for a longer distance, and then be bent at a right angle again to continue to extend along a direction perpendicular to and close to the bottom of the radiator 11 until the top and the bottom of the radiator 11 are blocked.

The feeding portion 12 may be made of an iron member, a metal copper foil, a conductor in a Laser Direct Structuring (LDS) process, or the like. Referring to fig. 2a and fig. 2c, the feeding portion 12 is substantially L-shaped and disposed in the cavity 111. The feeding part 12 and the inner wall of the radiator 11 are arranged at intervals, and the projection of the feeding part 12 on a certain plane is at least partially overlapped with the projection of the slot 113 on the plane. For example, as shown in fig. 2a and 2c, a projection of the feeding portion 12 in the Y-axis plane at least partially overlaps a projection of the slit 113 in the Y-axis plane.

In the embodiment of the present application, the radiator 11 may further include at least one connection point. For example, in the embodiment of the present application, the radiator 11 may be provided with connection points 115 at positions of both ends thereof, respectively. The ground is provided to the radiator 11 by grounding the connection point 115, for example by connecting the connection point 115 to a ground plane 117 (see fig. 2 d-2 f).

It should be understood that please refer to fig. 2d and fig. 2f together, wherein fig. 2d is an overall schematic diagram of the antenna module 100 connected to the ground plate 117 according to the embodiment of the present application. Fig. 2e is a schematic cross-sectional view of the antenna module 100 shown in fig. 2d filled with a medium. Fig. 2f is another schematic diagram of the antenna module 100 shown in fig. 2d without filling medium. In one embodiment, the grounding plate 117 covers the opening of one side of the cavity 111, for example, the opening of the bottom of the cavity 111. The radiator 11 is further provided with a slot 118. In the embodiment of the present application, the slot 118 is opened along the length direction of the radiator 11, and the slot 118 is communicated with the slot 113. Thus, by the arrangement of the slit 118, the connection points 115 may be formed at both ends of the slit 118, respectively, and the connection points 115 may be connected to the ground plate 117.

It is understood that in the present embodiment, by providing the ground plate 117, effective grounding of the antenna module 100 can be achieved. Of course, in the embodiment of the present application, the shape and size of the ground plate 117, the position relationship between the ground plate and the radiator 11, and the like are not particularly limited. For example, in another embodiment, the ground plate 117 may be directly disposed in the cavity 111, or the ground plate 117 may not be disposed (i.e., the ground plate 117 is not present at the above position but disposed at another position, such as outside the cavity 111), or the ground plate 117 does not cover the opening of the cavity 111, and the antenna module 100 may also obtain better performance, even better antenna performance.

It is understood that, referring to fig. 2d and fig. 2e again, in the embodiment of the present application, the cavity 111, the slit 113, and the slit 118 are all filled with a dielectric material, such as, but not limited to, plastic, rubber, glass, wood, ceramic, and the like.

It is understood that in the embodiment of the present application, the connection point 115 between the radiator 11 and the ground (e.g., the ground plate 117) may be connected through a lumped device, a tuning device (e.g., a switch, a variable capacitor, etc.), or directly (i.e., the radiator 11 is directly grounded through the connection point 115), or switched through a connector (e.g., a spring, a pin, etc.), or connected to the ground plate 117 through a coupling capacitor in a non-contact manner, etc., and the connection manner between the radiator 11 and the ground plate 117 is not particularly limited herein.

It can be understood that, referring to fig. 3a, fig. 3b and fig. 3c, one end of the feeding portion 12 is electrically connected to a signal feeding point (not shown) on the rf board 15, and feeds the slot 113 by coupling. Namely, the connection position of the feeding branch (i.e. the feeding part 12) of the antenna module 100 and the rf board 15 is on the rf board 15. The rf board 15 inputs rf signals from an rf circuit (not shown) on the rf board 15 to the feeding portion 12. The radio frequency board 15 may be a Flexible Printed Circuit (FPC), a hard board, a Liquid Crystal Polymer (LCP), or the like. The rf board 15 may be disposed in the cavity 111 or disposed outside the cavity 111, and is not limited herein.

In the embodiment of the present application, the radiator 11 is configured by disposing the slot 113, so that the radiator 11 is equivalent to a C-shaped structure with one side open, that is, one side is broken, and other parts are connected together. Thus, in operation, the antenna module 100 forms an Inductive Coupling Element (ICE) antenna. The radiator 11 of the antenna module 100 forms a resonant antenna, and generates inductance required for resonance through the cavity 111, and generates a stronger distributed capacitance by using the slot 113. By means of this capacitance and inductance, the radiator 11 can generate a good resonance, i.e. operate in a resonant mode, and the resonant frequency of the radiator 11 is inversely proportional to the product of the distributed capacitance and inductance.

The length of the cavity 111, the medium in which the cavity 111 is filled, and the length of the slot 113 determine the resonant frequency of the radiator 11.

It can be understood that, in the embodiment of the present application, by at least partially overlapping the projection of the feeding part 12 on a certain plane with the projection of the slot 113 on the plane, accurate coupling of the feeding part 12 and the slot 113 can be effectively ensured.

It is understood that, in the embodiment of the present application, the feeding portion 12 is disposed in an L shape and is disposed in the cavity 111. As such, it has at least the following advantages. First, when the antenna module 100 is applied to an electronic device, a feeding point can be moved from a metal bezel of the electronic device to an inner metal wall, which is easy to implement. Secondly, the adjustment of the length of the feeding part 12 and the relative position of the feeding part 12 and the slit 113 is more flexible, which can effectively help the matching of the input ports. That is, the feeding part 12 adopts a coupling feeding manner, and the degree of freedom of adjustment is higher than that of direct feeding (direct feeding). Further, by providing the feed-in portion 12 in an L-shape and in the cavity 111, it is possible to transfer the feeding point from the outside of the loop to the inside of the loop, and to provide both the feeding point and the matching element on the rf board 15. Thus, there is no need to use an extended LCP for feeding and matching, the insertion loss and the cost of processing and assembling can be reduced, and the problem of product reliability can be solved.

It is understood that, referring to fig. 4a and fig. 4b together, in the embodiment of the present application, the antenna module 100 may further include a tuning element 17 for tuning the frequency. In the embodiment of the present application, the number, the position, and the like of the tuning elements 17 are not limited. For example, the tuning element 17 may be disposed on the feeding element 12 (see fig. 4a), i.e., electrically connected to the feeding element 12 and grounded. The tuning element 17 may be disposed on the radiator 11 and grounded (see fig. 4 b). The tuning element 17 may also be disposed on one or both sides of the slot 113 (e.g., on the right side of the slot 113), or directly across the slot 113, or the tuning element 17 may also be disposed on the connection point 115 (i.e., one end of the tuning element 17 is connected to the connection point 115 and the other end is grounded). That is, the connection point 115 is grounded through the tuning element 17. As shown in fig. 4a and 4b, the above positions each show only one tuning element 17. Of course, in other embodiments, one or more tuning elements 17 may be disposed at the positions, and the tuning elements 17 at each position may exist individually or simultaneously, and are not limited herein.

It is understood that the tuning element 17 can be, but is not limited to, a switch, a variable capacitor, or a variable inductor, etc. to realize frequency adjustment.

It is understood that, in the above embodiments, the slits 113 are all zigzag. However, in the embodiment of the present application, the specific shape and size of the slot 113 are not limited, and the specific shape and size can be adjusted according to specific requirements (e.g., according to a desired frequency band). For example, the overall length and/or width of the slot 113 may be adjusted so that the radiator 11 generates a stronger distributed capacitance, and by means of this capacitance, the radiator 11 may generate a good resonance in a low frequency band.

It is understood that, in the above embodiment, the slot 113 is opened at a position substantially in the middle of one of the side walls of the radiator 11. However, in the embodiment of the present application, the opening position of the slit 113 is not particularly limited. For example, referring to fig. 3a to 3c and fig. 5a to 5c, in another embodiment, the slot 113 is opened at a position of the radiator 11 close to one of the connection points 115.

It is understood that, in the above embodiment, the feeding portion 12 is disposed in the cavity 111 and is substantially L-shaped. However, in the embodiment of the present application, the layout position and/or the shape of the feeding part 12 are not particularly limited, and may be adjusted according to specific design requirements. For example, the feeding portion 12 may also be disposed outside the cavity 111. As another example, the feeding portion 12 may be a straight bar or other forms.

It is understood that, referring to fig. 6a, fig. 6b and fig. 6c together, the antenna module 100 according to the above embodiments can be applied to an electronic device 200 that requires an antenna, such as a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), a Customer Premise Equipment (CPE), a television, and the like, for transmitting and receiving radio waves to transmit and exchange wireless signals.

It is to be appreciated that the electronic device 200 may employ one or more of the following communication techniques: bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, wireless fidelity (Wi-Fi) communication technology, global system for mobile communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE) communication technology, 5G communication technology, SUB-6G communication technology, future other communication technologies, and the like.

It is understood that the number of the antenna modules 100 is not limited when the antenna module 100 is applied to the electronic device 200. For example, the number of the antenna modules 100 can be adjusted according to the size and specific requirements of the electronic device 200. Also, in the embodiment of the present application, the position of the antenna module 100 on the electronic device 200 is not limited. For example, the layout position of the antenna module 100 may be adjusted according to the height of the electronic device 200, and the like.

Specifically, referring to fig. 6a, in the first case, the electronic device 200 is shown to include three antennas. Wherein, the antenna 1 and the antenna 2 are disposed on two sides of the electronic device 200. The antenna 3 is disposed at the bottom of the electronic device 200. The antenna 1 and the antenna 2 are the antenna modules 100 described in the above embodiments. The antenna 3 may be a conventional antenna, such as an IFA antenna, a loop (loop) antenna, or the like, or the antenna 3 may also be the antenna module 100 described in the above embodiments, which is not limited herein.

Referring also to fig. 6b, in a second case, the electronic device 200 is shown to include four antennas. The antenna 1, the antenna 2, and the antenna 3 are the antenna module 100 described in the above embodiments. The antenna 4 may also be a conventional antenna or the antenna module 100 described in the above embodiments, and is not limited herein. The

antennas

1 and 4 are arranged on the right side of the electronic device 200 at intervals. The

antennas

2 and 3 are arranged on the left side of the electronic device 200 at intervals and are located on two sides of the side key 5 of the electronic device 200.

Referring also to fig. 6c, in a third case, the electronic device 200 is shown to include four antennas. The antenna 1 and the antenna 2 are the antenna module 100 described in the above embodiments. The

antennas

3 and 4 may also be conventional antennas or the antenna module 100 described in the above embodiments, and are not limited herein. The antenna 1 and the antenna 2 are arranged on the left side of the electronic device 200 and are positioned on two sides of the side key 5. The antenna 3 is disposed at the lower right corner of the electronic device 200. The antenna 4 is disposed at the bottom of the electronic device 200 and is disposed close to the antenna 3.

It should be understood that, referring to fig. 7a, fig. 7b and fig. 7c together, in the embodiment of the present application, when the antenna module 100 is applied to the electronic device 200, the electronic device 200 is taken as a mobile phone and includes three antennas, i.e., an antenna 1, an antenna 2 and an antenna 3, for example, to describe the position and the operation principle of the antenna module 100 on the electronic device 200.

Wherein the electronic device 200 comprises a housing 21. The housing 21 at least includes a frame 211 and a back plate 212. The frame 211 is a ring-shaped structure made of metal or other conductive material and is disposed on the back plate 212. The backplate 212 may be made of metal or other conductive material. Of course, the back plate 212 may also be made of an insulating material, such as glass, plastic, etc., without limitation.

The frame 211 includes at least a first frame portion 215, a second frame portion 216, and a third frame portion 217. In the embodiment of the present application, the first frame portion 215 is a bottom end of the electronic device 200, that is, the first frame portion 215 is a bottom metal frame of the electronic device 200. The second frame portion 216 and the third frame portion 217 are provided to face each other, and both are provided at both ends of the first frame portion 215. In the embodiment of the present application, the length of the second frame portion 216 or the third frame portion 217 is greater than the length of the first frame portion 215. That is, the second frame portion 216 and the third frame portion 217 are both side metal frames of the electronic device 200.

The

antennas

1 and 2 are respectively disposed on two sides of the electronic device 200. The antenna 3 is disposed at the bottom of the electronic device 200. The

antennas

1 and 2 are the antenna modules 100 described in the above embodiments. In the present embodiment example, the structure of the antenna 3 is not limited. For example, the structure of the antenna 3 may be the same as that of the antenna module 100, or may be a conventional antenna, such as an IFA antenna, a loop antenna, or the like. In the embodiment of the present application, the antenna 3 is a conventional antenna, and the antenna 1, the antenna 2, and the antenna 3 are all LB antennas for example. Of course, in other embodiments, the antenna module 100 is not limited to be an LB antenna, and the slot 113 and/or the feeding portion 12 may be adjusted to enable the antenna module 100 to form other types of antennas, such as an intermediate frequency antenna, a high frequency antenna, and the like.

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 is understood that, in the above-described embodiment, the radiator 11 in the antenna module 100 is made of a conductive material such as metal. Referring to fig. 7a, in other embodiments, when the antenna module 100 is applied to the electronic device 200, the radiator 11 may also be directly formed by the frame 211 of the electronic device 200. That is, the radiator 11 may be formed by disposing a portion of the frame 211 (e.g., the second frame portion 216 or the third frame portion 217) in a closed ring shape, and opening a corresponding slot 113 at one side of the frame 211.

It can be understood that, referring to fig. 7b together, in the embodiment of the present application, when the antenna module 100 is applied to the electronic device 200, the slot 113 of the radiator 11 is opened on the surface of the electronic device 200, which faces the outside, of the frame 211. The feeding part 12 is disposed in the cavity 111 and electrically connected to an internal rf board (not shown) to feed signals into the slot 113.

It should be understood that, referring to fig. 7c, in the embodiment of the present invention, the cavity 111 and the gap 113 are filled with a dielectric material, such as, but not limited to, plastic, rubber, glass, wood, ceramic, and the like.

Fig. 8 is a graph of S-parameters (scattering parameters) and isolation curves of the three antennas in the electronic device 200 shown in fig. 7 a. The curve S81 is an S-parameter curve of the antenna 1. Curve S82 is the S-parameter curve for antenna 2. Curve S83 is the S-parameter curve for antenna 3. Curve S84 is the isolation curve between antenna 1 and antenna 2. Curve S85 is the isolation curve between antenna 1 and antenna 3. Curve S86 is the isolation curve between antenna 2 and antenna 3. Obviously, when the electronic device 200 is provided with the antenna module 100 (e.g., the antenna 1 and the antenna 2), the electronic device 200 has good radiation performance, and the isolation between the antenna 1 and the antenna 2 and the antenna 3 is substantially below-13 dB, which meets the design requirement of the antenna.

Fig. 9 is a schematic diagram of the current distribution of the antenna 1 and the antenna 2 in the electronic device 200 shown in fig. 7 a. The resonant modes of the

antennas

1 and 2 depend on the length of the slot (e.g., the length of the cavity 111), the filling medium in the slot, and the length of the slot (e.g., the slot 113), so that strong longitudinal currents (e.g., I1 and I2) can be excited.

FIG. 10 is a graph of ECC plots for three antennas in the electronic device 200 shown in FIG. 7 a. The curve S101 is an ECC curve between the antenna 1 and the antenna 2. Curve S102 is an ECC curve between antenna 1 and antenna 3. Curve S103 is an ECC curve between antenna 2 and antenna 3. Obviously, when the electronic device 200 is provided with the antenna module 100 (e.g., antenna 1, antenna 2), three low frequency (LB) antennas may coexist. In addition, better isolation can be achieved between the three antennas, with the worst isolation between antenna pairs being about-14 dB. Furthermore, the average of the ECCs of the

antennas

1 and 2, and the

antennas

1 and 3 in the B28 band is about 0.6, and the ECC drops rapidly from the B20 band, and the average is less than 0.3. The ECC of antenna 2 and antenna 3 will be higher than 0.5 throughout the low band.

Fig. 11a, 11b and 11c are schematic 3D directional diagrams of three antennas in the electronic device 200 shown in fig. 7 a. Fig. 11a is a schematic diagram of the 3D direction of the antenna 1 at a frequency of 0.84 GHz. Fig. 11b is a schematic 3D view of the antenna 2 at a frequency of 0.84 GHz. Fig. 11c is a schematic 3D view of the antenna 3 at a frequency of 0.84 GHz. Obviously, antenna 3 will have a deep null in the horizontal plane, and the directivity patterns of antenna 1 and antenna 2 in the horizontal plane are better in roundness and tend to have omni-directional distribution. That is, the electronic device 200 may be provided with a plurality of antenna modules 100. Multiple antenna modules 100 may coexist with each other and achieve good isolation and ECC between antenna pairs while maintaining good radiation efficiency and uniform horizontal plane radiation patterns.

Fig. 12a, 12b and 12c are schematic diagrams illustrating simulation of the head-hand performance of the antenna in the electronic device 200 shown in fig. 7 a. Fig. 12a is a schematic diagram of a state of the electronic device 200 when being held. Wherein, when the electronic device 200 is held, the antenna 2 is wrapped in the palm of the hand, and the radiation end of the antenna 3 is also wrapped in the palm of the hand. Fig. 12b is a schematic diagram of the electronic device 200 being in Left Hand and Hand at Left (BHHL) mode (i.e. the performance of the antenna of the handset held by the american society for wireless communication and internet Association (citia) Head and the Wide Hand on the Left (Wide Hand)). Fig. 12c is a schematic diagram of the electronic device 200 in the Right Hand and Head side (BHHR) mode (i.e. the handset antenna performance under the citia compliant Head and Right Wide Hand (Wide Hand) grip).

Fig. 13 is a simulation graph of the head-hand performance of the antenna 1 in the electronic device 200 shown in fig. 7 a. The curve S131 is a radiation efficiency-frequency relationship curve of the antenna 1 in a Free Space (FS) mode in the electronic device 200 shown in fig. 7 a. Curve S132 is the radiation efficiency versus frequency for the antenna 1 in the electronic device 200 shown in fig. 7a in the BHHR mode. The curve S133 is a radiation efficiency versus frequency curve of the antenna 1 in the electronic device 200 shown in fig. 7a in the BHHL mode. As can be seen from fig. 13, the performance of the antenna 1 in the embodiment of the present application is balanced in the BHHR mode and the BHHL mode, and compared with the efficiency in the FS mode, the reduction is about 7dB, and the S parameter in the hand-held state has no frequency offset.

It is to be understood that, as described above, in the embodiment of the present application, the radiator 11 of the antenna module 100 may be directly made of a metal material or other materials with conductivity, or directly formed by a metal frame of the electronic device 200. For example, the chassis (frame) of the electronic device 200 is made of metal, and the antenna module 100 is a metal frame antenna (see, for example, fig. 7a to 7 c). Of course, in the embodiment of the present application, a specific implementation form of the radiator 11 in the antenna module 100 is not limited. For example, the radiator 11 in the antenna module 100 may also be, but is not limited to, a Mode Decoration Antenna (MDA), a Flexible Printed Circuit (FPC), a Laser-Direct-structuring (LDS), a Liquid Crystal Polymer (LCP), and other antenna forms.

For example, when the antenna module 100 is an MDA antenna, it utilizes a metal part in the chassis of the electronic device 200 as a radiator to implement a radiation function. The housing of the electronic device 200 is made of an insulating material such as plastic, and the metal part is integrated with the housing by an in-mold injection molding method.

For another example, please refer to fig. 14a and 14b together, in which fig. 14a is a schematic view illustrating an antenna module applied to an electronic device according to an embodiment of the present application. Fig. 14b is a schematic diagram of the antenna module of fig. 14 a. In one embodiment, the antenna module 100 may include a carrier 18. The carrier 18 may be made of an insulating material such as plastic. The radiator 11 is disposed on the carrier 18. The radiator 11 is in the form of an antenna of FPC, LDS, LCP. By providing the corresponding slot 113 on the radiator 11 and using the feeding part 12 to feed the signal into the slot 113 in a coupling manner, the radiator 11 operates in a corresponding frequency band.

It will be appreciated that in the embodiment shown in fig. 14b, both ends of the radiator 11 are grounded at the location of the connection point 115. Of course, referring to fig. 14a again, when the antenna module 100 is applied to the electronic device 200, the electronic device 200 further electrically connects the radiator 11 to a metal frame (e.g., the frame 211) of the radiator, and is grounded at a position of the frame 211 close to the radiator 11, so that the radiator 11 is grounded in a large area through the metal frame 211, and the radiation performance of the antenna module 100 is further effectively improved.

In summary, the antenna module 100 and the electronic device 200 having the antenna module 100 have at least the following advantages:

(1) based on the original ring-shaped excitation structure (coplanar ring-shaped excitation, bridge ring-shaped excitation, etc.), the side-slot type excitation structure is provided according to the characteristics of the structure of electronic equipment such as a mobile phone, etc.

(2) All excitation structures are provided with a slot at an outer ring, and the traditional feeding mode is to load signals at two ends of the slot. And the coupling feed structure in the embodiment of the present application is formed by making a long slit (e.g., slit 113) on the outer ring. Thus, a large distributed capacitance can be generated by using the long slit, and the inductance required for resonance is generated by using the cavity 111, so that the antenna excites a good resonance in a low frequency band, namely, a non-resonant antenna is transformed into a resonant antenna.

(3) In the present embodiment, an L-shaped feed stub (i.e., feed 12) is used, and the feed point is shifted from the outside of the loop to the inside of the loop. In this manner, both the feed point and the matching device can be placed directly on the rf board without the need for an elongated LCP to achieve both feeding and matching. The above mode can effectively reduce the cost of insertion loss and processing assembly, and solve the problem of product reliability.

The radiator 11 in the antenna module 100 of the embodiment of the present application is provided with a section of open slot 113, and the slot 113 divides the radiator 11 into two parts that are not directly connected. The radiator 11 is further provided with a connection point 115 to provide grounding for the radiator 11. The antenna module 100 does not need to be provided with a serial capacitor, and can obtain good resonance by using the slot 113, so that the antenna design is simpler, the efficiency bandwidth of the antenna is greatly expanded, and the feeding is easier to realize and stabilize in product implementation. In addition, the antenna module 100 can be applied to a mobile phone, and can also be applied to any terminal needing an antenna, such as a CPE, E5, a television, and the like, and the application is very wide. Furthermore, a single or a plurality of antenna modules can be arranged in one terminal device, and the arrangement position is not limited and is very flexible. The electronic device 200 can support more than two layouts of the antenna module 100, the antenna module 100 can be miniaturized, and the performance of the antenna module 100 is not affected by hand holding.

It will be evident to those skilled in the art that the 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

1. An antenna module, comprising a radiator and a feeding portion, wherein the radiator is in a ring shape, to form a cavity, a slit is arranged on the radiator and penetrates from the top of one side wall of the radiator to the bottom of the radiator, so as to divide the radiator into a first part and a second part which are arranged at intervals, wherein one ends of the first part and the second part are arranged at intervals through the gap, the other parts are connected together, the radiator is provided with a connecting point, the connecting point is connected to the grounding plate, the feed-in part and the radiator are arranged at intervals, the projection of the feed-in part on a certain plane is overlapped with the projection part of the slot on the plane, and the feed-in part is used for coupling a feed signal to the slot.

2. The antenna module of claim 1, wherein: the radiator forms a resonant antenna, the radiator generates inductance required by resonance through the cavity and generates distributed capacitance through the gap, and the resonant frequency of the radiator is inversely proportional to the product of the distributed capacitance and the inductance.

3. The antenna module of claim 2, wherein: the cavity and the gap are filled with media, and the length of the cavity, the media filled in the cavity and the length of the gap determine the resonant frequency of the radiator.

4. The antenna module of any of claims 1-3, wherein: the ground plate covers in one side opening of cavity, still set up the seam on the irradiator, the seam with the seam communicates, and in the both ends of seam form the tie point, the tie point with the ground plate is connected.

5. The antenna module of any of claims 1-3, wherein: the ground plate is arranged in the cavity or arranged at other positions, does not cover the opening of the cavity, and is connected with the connecting point.

6. The antenna module of any of claims 1-5, wherein: the antenna module further comprises a tuning element, the slot is connected across the tuning element, the feed, the first portion, the second portion, and/or the connection point is grounded through the tuning element, and the tuning element comprises a switch, a variable capacitor, and/or a variable inductor.

7. The antenna module of any of claims 1-6, wherein: the connection point is connected to the ground plate through a lumped device or a tuning device; or

The connection point is directly connected to the ground plate; or

The connection point is switched to the grounding plate through a connector; or

The connection point is grounded in a non-contact manner with the ground plate through a coupling capacitor.

8. The antenna module of any one of claims 1-7, wherein: the feed-in part is L-shaped and is arranged in the cavity.

9. The antenna module of any of claims 1-8, wherein: the antenna module further comprises a radio frequency board, the radio frequency board is arranged outside the cavity or in the cavity, and the radio frequency board is electrically connected with the feed-in part and used for feeding in electric signals to the feed-in part.

10. The antenna module of any of claims 1-9, wherein: the radiator is made of a metal material or a material having conductivity.

11. The antenna module of any of claims 1-9, wherein: the radiator is a metal frame of the electronic device.

12. The antenna module of any of claims 1-9, wherein: the radiator is arranged in a shell of the electronic equipment and is integrated with the shell in an in-mold injection molding mode.

13. The antenna module of any of claims 1-9, wherein: the antenna module further comprises a carrier, the carrier is made of an insulating material, the radiator is made of a flexible circuit board, a laser direct forming process or a liquid crystal high polymer is formed on the carrier.

14. An electronic device, characterized in that: the electronic device comprising an antenna module according to any of claims 1-9.

15. The electronic device of claim 14, wherein: the radiator is made of a metal material or a material having conductivity.

16. The electronic device of claim 14, wherein: the electronic device comprises a metal frame, and the radiating body is the metal frame of the electronic device.

17. The electronic device of claim 14, wherein: the electronic equipment further comprises a casing, wherein the radiating body is arranged in the casing and is integrally made with the casing in an in-mold injection molding mode.

18. The electronic device of claim 14, wherein: the antenna module further comprises a carrier, the carrier is made of an insulating material, the radiator is made of a flexible circuit board, a laser direct forming process or a liquid crystal high polymer is formed on the carrier.