CN117673753A

CN117673753A - Antenna assembly and electronic equipment

Info

Publication number: CN117673753A
Application number: CN202211041885.0A
Authority: CN
Inventors: 吴小浦; 张云帆; 闫金锋
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2024-03-08
Also published as: WO2024045853A1

Abstract

The application provides an antenna assembly and electronic equipment. The antenna assembly comprises a first feed source, a first radiator, a first matching circuit, a second matching circuit and a second radiator; the first radiator is provided with a first grounding end, a first coupling end and a feed point, and the feed point is positioned between the first grounding end and the first coupling end and is electrically connected to the first feed source; the second radiator is provided with a second grounding end, a second coupling end and a first connecting point, wherein the second grounding end is electrically connected with the first matching circuit to the ground, the second coupling end and the first coupling end are coupled and have a coupling gap, and the first connecting point is positioned between the second grounding end and the second coupling end and is electrically connected with the second matching circuit; the first radiator and the second radiator support a plurality of resonance modes under the excitation of the first feed source, one of the resonance modes is used for supporting a UWB frequency band, and the frequency band supported by the other resonance modes is different from the UWB frequency band. The antenna assembly provided by the embodiment of the application can support more frequency bands and has better communication performance.

Description

Antenna assembly and electronic equipment

Technical Field

The application relates to the field of communication technology, in particular to an antenna assembly and electronic equipment.

Background

With the development of technology, electronic devices such as mobile phones with communication functions have become more and more popular and more powerful. An antenna assembly is typically included in an electronic device to enable communication functions of the electronic device. However, the communication performance of the antenna assembly in the electronic device in the related art is not good enough, and there is room for improvement.

Disclosure of Invention

In a first aspect, the present application provides an antenna assembly comprising:

a first feed;

a first matching circuit;

a second matching circuit;

the first radiator is provided with a first grounding end, a first coupling end and a feed point, wherein the first grounding end is grounded, and the feed point is positioned between the first grounding end and the first coupling end and electrically connects a first matching circuit to the first feed source; and

The second radiator is provided with a second grounding end, a second coupling end and a first connecting point, the second grounding end is electrically connected to the ground, the second coupling end is coupled with the first coupling end and has a coupling gap, and the first connecting point is positioned between the second grounding end and the second coupling end and is electrically connected with the second matching circuit;

The first radiator and the second radiator support a plurality of resonance modes under the excitation of the first feed source, wherein one of the resonance modes is used for supporting a UWB frequency band, and the frequency band supported by the rest resonance modes in the plurality of resonance modes is different from the UWB frequency band.

In a second aspect, the present application provides an electronic device, including a housing and a first antenna assembly, where the first antenna assembly is an antenna assembly according to the first aspect, and at least one of a first radiator and a second radiator of the antenna assembly is integrated in the housing, or is disposed on a surface of the housing, or is disposed in an accommodating space surrounded by the housing.

Because in the antenna assembly provided by the embodiment of the application, the first radiator and the second radiator are capacitively coupled, that is, the first radiator and the second radiator are co-aperture. When the first feed source works, not only the first radiator but also the second radiator can be utilized, in other words, the first feed source can excite the resonant current on the first radiator and the resonant current on the second radiator. Compared with the first feed source which can only be independently used by the first radiator, the antenna assembly provided by the embodiment of the application can use the second radiator in addition to the first radiator, and can generate more resonance modes. Therefore, the antenna component can support more frequency bands, and has better communication performance.

From another aspect, compared to the related art, in which a single radiator supports one frequency band, the antenna assembly provided in the embodiment of the present application sufficiently multiplexes the first radiator and the second radiator while supporting the required frequency band, so that the lengths of the first radiator and the second radiator can be reduced.

In addition, compared with the prior art that the UWB antenna is separately arranged on the motherboard bracket, in the antenna assembly provided in this embodiment of the present invention, one of the plurality of resonant modes can support the UWB frequency band, and the frequency band supported by the rest of the plurality of resonant modes is different from the UWB frequency band, so that the UWB frequency band in the antenna assembly can share one antenna assembly with other frequency bands, without separately setting the UWB antenna, which is beneficial to improving the integration level of the antenna assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is an exploded perspective view of the electronic device of FIG. 1 at an angle;

FIG. 3 is an exploded perspective view of the electronic device of FIG. 1 at another angle;

fig. 4 is a schematic diagram of an antenna assembly according to an embodiment of the present application;

fig. 5 is a schematic diagram of S parameters corresponding to the antenna assembly provided in fig. 4;

FIG. 6 is a schematic diagram of the efficiency of the antenna assembly provided in FIG. 4;

fig. 7 is a schematic diagram of an antenna assembly according to an embodiment of the present disclosure;

fig. 8 is a simulation diagram of S parameters corresponding to the antenna assembly provided in fig. 7;

fig. 9 is a schematic structural diagram of an antenna assembly according to another embodiment of the present disclosure;

fig. 10 is a schematic diagram of main current flow corresponding to a first resonant mode of an antenna assembly according to an embodiment of the present disclosure;

fig. 11 is a schematic diagram of main current flow corresponding to a second resonant mode of an antenna assembly according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram of main current flow corresponding to a third resonant mode of an antenna assembly according to an embodiment of the present disclosure;

fig. 13 is a schematic diagram of main current flow corresponding to a fourth resonant mode of an antenna assembly according to an embodiment of the present disclosure;

Fig. 14 is a schematic diagram of main current flow corresponding to a fifth resonant mode of an antenna assembly according to an embodiment of the present disclosure;

fig. 15 is a schematic diagram of main current flow corresponding to a sixth resonant mode of the antenna assembly according to the embodiment of the present application;

fig. 16 is a schematic diagram of main current flow corresponding to a seventh resonant mode of the antenna assembly provided in the embodiment of fig. 8;

fig. 17 is a schematic diagram of main current flow corresponding to an eighth resonant mode of the antenna assembly provided in the embodiment of fig. 8;

fig. 18 is a schematic view of an antenna assembly according to another embodiment of the present disclosure;

fig. 19 is a simulation diagram of S parameters corresponding to the second feed in the antenna assembly provided in fig. 18;

FIG. 20 is a schematic diagram of main current flow corresponding to the ninth resonant mode;

fig. 21 is a schematic view of an antenna assembly according to another embodiment of the present disclosure;

fig. 22 is a schematic view of an antenna assembly according to another embodiment of the present disclosure;

fig. 23 is a schematic diagram of S parameter corresponding to the third feed in the antenna assembly of fig. 22;

FIG. 24 is a schematic diagram of main current flow corresponding to a tenth resonant mode;

FIG. 25 is a schematic diagram illustrating the main current flow corresponding to the eleventh resonant mode;

FIG. 26 is a schematic diagram illustrating the main current flow corresponding to the twelfth resonant mode;

Fig. 27 to 34 are schematic diagrams of sub-frequency selective filter circuits provided in various embodiments of the present application;

fig. 35 is a schematic diagram illustrating isolation of each antenna unit in the antenna assembly provided in fig. 22;

fig. 36 is a schematic view of radiation efficiency of each antenna unit in the antenna assembly shown in fig. 22 when applied to an electronic device;

FIG. 37 is a schematic S-parameter diagram of the second to eighth resonant modes corresponding to the first feed;

fig. 38 is a schematic diagram of S parameters corresponding to the first feed and the third feed in the antenna assembly shown in fig. 21;

fig. 39 is a schematic diagram of S parameters corresponding to the first feed and the second feed in the antenna assembly shown in fig. 18;

fig. 40 is a schematic view of an antenna assembly according to another embodiment of the present application;

fig. 41 is a schematic diagram of an antenna assembly according to an embodiment of the present disclosure;

fig. 42 is a schematic view of the antenna assembly of fig. 41 in an electronic device;

fig. 43 is a schematic diagram of an electronic device according to an embodiment of the present application when communicating with a terminal device;

FIG. 44 is an exploded perspective view of an electronic device according to another embodiment;

FIG. 45 is a schematic view of the electronic device of FIG. 44 from another perspective after assembly.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Furthermore, references herein to "an embodiment" or "an implementation" mean that a particular feature, structure, or characteristic described in connection with the embodiment or implementation may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1, fig. 2, and fig. 3, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application; FIG. 2 is an exploded perspective view of the electronic device of FIG. 1 at an angle; fig. 3 is an exploded perspective view of the electronic device shown in fig. 1 at another angle. The electronic device 1 comprises an antenna assembly 10. The antenna assembly 10 is used for receiving and transmitting electromagnetic wave signals to realize the communication function of the electronic device 1. The position of the antenna assembly 10 on the electronic device 1 is not specifically limited in this application, and fig. 1 is only an example and should not be construed as limiting the position of the antenna assembly 10 in the electronic device 1.

The electronic device 1 comprises a device body and an antenna assembly 10, the antenna assembly 10 being carried by the device body. The device body includes, but is not limited to, a display 80 and a housing 30 that are connected to each other in a covering manner. The antenna assembly 10 may be disposed inside the housing 30 of the electronic device 1, or partially integrated with the housing 30, or partially disposed outside the housing 30.

The electronic device 1 includes, but is not limited to, a device capable of transmitting and receiving electromagnetic wave signals such as a mobile phone, a telephone, a television, a tablet computer, a camera, a personal computer, a notebook computer, a vehicle-mounted device, an earphone, a wristwatch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (Customer Premise Equipment, CPE), and the like. In this application, the electronic device 1 is taken as an example of a mobile phone, and other devices may refer to the specific description in this application.

Referring to fig. 2, the electronic device 1 further includes a circuit board, a battery, a functional device 70 (the functional device 70 may include one or more of a camera module, a microphone, a receiver, a speaker, a face recognition module, and a fingerprint recognition module) and the like disposed in the accommodating space, which are not described in detail in this embodiment. It should be understood that the foregoing description of the electronic device 1 is merely illustrative of one environment in which the antenna assembly 10 may be used, and the specific structure of the electronic device 1 should not be construed as limiting the antenna assembly 10 provided herein.

The antenna assembly 10 provided herein may be an antenna assembly 10 that may support, but is not limited to, UWB technology. Signals supported by the antenna assembly 10 include, but are not limited to, signals in the UWB band, and the like. The UWB technology adopts non-sinusoidal wave narrow pulse transmission data of nanosecond to microsecond instead of carrier wave, so that the occupied frequency spectrum range is wider, and the UWB technology is suitable for high-speed and short-distance communication. The federal communications commission (Federal Communications Commission, FCC) states that the operating frequency range of the antenna assembly 10 supporting UWB technology ranges from 3.1GHz to 10.6GHz, with a minimum operating frequency bandwidth of 500MHz. The electromagnetic wave signals received by the antenna assembly 10 of the current mainstream UWB technology generally include a CH9 band (the frequency range is 7.75GHz to 8.25GHz, the center frequency point is 8 GHz) and a CH5 band (the frequency range is 6.25GHz to 6.75GHz, and the center frequency point is 6.5 GHz).

With the development of light and thin electronic devices 1 and miniaturization, the space reserved for the antenna assembly 10 in the electronic device 1 is more and more limited, and therefore, how to achieve miniaturization and compactness of the antenna assembly 10, so as to better apply the antenna assembly 10 to the electronic device 1 with limited space, so as to increase the antenna function in the electronic device 1 and increase the application scenario of the antenna assembly 10, which is a technical problem to be solved.

The following is a description of specific structures of the antenna assembly 10 provided in the present application, and of course, the antenna assembly 10 provided in the present application includes, but is not limited to, the following embodiments.

For convenience of description, with reference to a view angle of the electronic apparatus 1 in fig. 1, in a cartesian coordinate system, a width direction of the electronic apparatus 1 is defined as an X-axis direction, a length direction of the electronic apparatus 1 is defined as a Y-axis direction, and a thickness direction of the electronic apparatus 1 is defined as a Z-axis direction. The X axis direction, the Y axis direction and the Z axis direction are perpendicular to each other, and the direction indicated by the arrow is the positive direction.

Referring to fig. 4, fig. 5 and fig. 6, fig. 4 is a schematic diagram of an antenna assembly according to an embodiment of the present application; fig. 5 is a schematic diagram of S parameters corresponding to the antenna assembly provided in fig. 4; fig. 6 is a schematic diagram of the efficiency of the antenna assembly provided in fig. 4. The antenna assembly of fig. 4 has a first resonant mode, a second resonant mode, a third resonant mode, a fourth resonant mode, a fifth resonant mode, a sixth resonant mode, a seventh resonant mode, and an eighth resonant mode. In fig. 5, the horizontal axis represents frequency in GHz; the vertical axis is the S parameter (S Parameters) in dB. The trough in the curve of the simulation diagram corresponds to one resonance mode. In fig. 5, each trough corresponds to a resonance frequency point of a resonance mode. As can be seen from this simulation, the curve has a plurality of valleys and, therefore, the antenna assembly 10 has a plurality of resonant modes. In fig. 5, point 1 is a resonance frequency point of a first resonance mode, point 2 is a resonance frequency point of a second resonance mode, point 3 is a resonance frequency point of a third resonance mode, point 4 is a resonance frequency point of a fourth resonance mode, point 5 is a resonance frequency point of a fifth resonance mode, point 6 is a resonance frequency point of a sixth resonance mode, point 7 is a resonance frequency point of a seventh resonance mode, and point 8 is a resonance frequency point of an eighth resonance mode. The abscissa in fig. 6 is frequency in GHz; the ordinate is efficiency in dB. Wherein curve (1) represents the radiation efficiency (System rad. Efficiency) of the antenna assembly and curve (2) represents the total System efficiency (System tot. Efficiency) of the antenna assembly. Referring to fig. 7 and 8, fig. 7 is a schematic diagram of an antenna assembly according to an embodiment of the present application. Fig. 8 is a simulation diagram of S parameters corresponding to the antenna assembly provided in fig. 7. It should be noted that the structure of the antenna assembly shown in fig. 7 has a first resonant mode, a second resonant mode, a third resonant mode, a fourth resonant mode, a fifth resonant mode, a sixth resonant mode, a seventh resonant mode, and an eighth resonant mode. In fig. 8, the horizontal axis represents frequency in GHz; the vertical axis is the S parameter (S Parameters) in dB. The trough in the curve of the simulation diagram corresponds to one resonance mode. In fig. 5, each trough corresponds to a resonance frequency point of a resonance mode. As can be seen from this simulation, the curve has a plurality of valleys and, therefore, the antenna assembly 10 has a plurality of resonant modes. In fig. 8, point 1 is a resonance frequency point of a first resonance mode, point 2 is a resonance frequency point of a second resonance mode, point 3 is a resonance frequency point of a third resonance mode, point 4 is a resonance frequency point of a fourth resonance mode, point 5 is a resonance frequency point of a fifth resonance mode, point 6 is a resonance frequency point of a sixth resonance mode, point 7 is a resonance frequency point of a seventh resonance mode, and point 8 is a resonance frequency point of an eighth resonance mode.

Therefore, when currents corresponding to the first, second, third, fourth, fifth, and sixth resonance modes are indicated, the antenna assembly shown in fig. 4 is illustrated. It will be appreciated that the currents corresponding to the first, second, third, fourth, fifth and sixth resonant modes are also applicable to the antenna assembly shown in fig. 7. When currents corresponding to the seventh resonance mode and the eighth resonance mode are indicated, an upper portion of the antenna assembly shown in fig. 7 is indicated. The antenna assembly 10 includes a first feed source S1, a first matching circuit M1, a second matching circuit M2, a first radiator 110, and a second radiator 120. The first radiator 110 has a first ground 111, a first coupling 112, and a feeding point F. The first grounding end 111 is grounded, and the feeding point F is located between the first grounding end 111 and the first coupling end 112 and electrically connects the first matching circuit M1 to the first feed source S1. The second radiator 120 has a second grounding end 121, a second coupling end 122 and a first connection point E. The second ground terminal 121 is electrically connected to ground. The second coupling end 122 is coupled with the first coupling end 112 and there is a coupling gap 110a. The first connection point E is located between the second ground terminal 121 and the second coupling terminal 122, and is electrically connected to the second matching circuit M2. The first radiator 110 and the second radiator 120 support a plurality of resonance modes under the excitation of the first feed source S1, wherein one of the plurality of resonance modes is used for supporting a UWB band, and the rest of the plurality of resonance modes support a band different from the UWB band.

As can be seen from fig. 5 and 8, the first resonant mode (the resonant mode at point 1) is supported in the UWB band. In fig. 5 and 8, the UWB band is a UWB CH9 band (the frequency range is 7.75GHz to 8.25GHz, and the center frequency point is 8 GHz).

In addition, as can be seen from fig. 6, the antenna assembly 10 has high efficiency in the CH5 band (the frequency range is 6.25GHz to 6.75GHz, and the center frequency point is 6.5 GHz) in the UWB band, and therefore, the antenna assembly 10 also supports the CH5 band of the UWB band.

Furthermore, as can be seen in fig. 6, the antenna assembly 10 has a high efficiency in each of the supported frequency bands (3 GHz-8.5 GHz).

It should be noted that, the frequency bands supported by the first resonant modes supported by the antenna assembly 10 with different structural configurations are the same or similar, and the resonant frequency points will be slightly different due to the different structural configurations, but the current distribution in the same resonant mode is the same. Specifically, the current distribution of the nth resonant mode of the antenna assembly 10 of the two structural configurations shown in fig. 4 and 7 is the same, where 1+.n+.8, and n is a positive integer. For example, the current distribution of the first resonant mode of the antenna assembly 10 shown in fig. 4 and its embodiments is the same as the current distribution of the first resonant mode of the antenna assembly 10 shown in fig. 7 and its embodiments. The second resonant mode of the antenna assembly 10 shown in fig. 4 and its embodiments is the same as the current distribution of the second resonant mode of the antenna assembly 10 shown in fig. 7 and its embodiments. And so on.

The first radiator 110 may be, but is not limited to, a laser direct structuring (Laser Direct Structuring, LDS) radiator, or a flexible circuit board (Flexible Printed Circuit, FPC) radiator 230, or a printed direct structuring (PrintDirect Structuring, PDS) radiator, or a metal stem radiator.

Referring to fig. 4, the first grounding end 111 and the first coupling end 112 of the first radiator 110 are opposite ends of the first radiator 110 in a linear shape. In other embodiments, the first radiator 110 is bent, and the first grounding end 111 and the first coupling end 112 may not be opposite along a straight line, but the first grounding end 111 and the first coupling end 112 are two ends of the first radiator 110.

The first ground terminal 111 is grounded, and for convenience of description, a ground point to which the first ground terminal 111 is electrically connected is named as a first ground point GND1. That is, the first ground terminal 111 is electrically connected to the first ground GND1. The first grounding terminal 111 is electrically connected to the ground, which includes but is not limited to direct electrical connection (such as soldering), or indirect electrical connection via coaxial line, microstrip line, conductive spring, conductive adhesive, etc. The specific position of the feeding point FA on the first radiator 110 is not limited, as long as the feeding point F is located between the first grounding end 111 and the first coupling end 112.

The second radiator 120 may be, but is not limited to, a laser direct structuring (Laser Direct Structuring, LDS) radiator, or a flexible circuit board (Flexible Printed Circuit, FPC) radiator 230, or a printed direct structuring (PrintDirect Structuring, PDS) radiator, or a metal stem radiator. The material of the second radiator 120 may be the same as that of the first radiator 110, or may be different from that of the first radiator 110, and is not limited in this embodiment.

The second grounding end 121 and the second coupling end 122 of the second radiator 120 are opposite ends of the second radiator 120 in a linear shape. In other embodiments, the second radiator 120 is bent, and the second grounding end 121 and the second coupling end 122 may not be opposite along a straight line, but the second grounding end 121 and the second coupling end 122 are two ends of the second radiator 120.

The second ground terminal 121 is electrically connected to the ground, and for convenience of description, the ground point to which the second ground terminal 121 is electrically connected is named as a second ground point GND2. That is, the second ground 121 is electrically connected to the second ground GND2. The second grounding terminal 121 is electrically connected to the ground, including but not limited to a direct electrical connection (such as soldering), or an indirect electrical connection via a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc. The specific position of the first connection point E on the second radiator 120 is not limited in this application, as long as the first connection point E is located between the second grounding end 121 and the second coupling end 122.

The first ground point GND1 and the second ground point GND2 include, but are not limited to, the following embodiments. Optionally, the antenna assembly 10 itself has a reference ground. Specific forms of the reference ground include, but are not limited to, a metal conductive plate, a metal conductive layer molded into the interior of a flexible circuit board, in a rigid circuit board, and the like. The first ground point GND1 and the second ground point GND2 may be two ground points in one reference ground formed integrally in the antenna assembly 10, or may be respective ground points in two independent but connected reference grounds in the antenna assembly 10. When the antenna assembly 10 is provided within the electronic device 1, the reference of the antenna assembly 10 is electrically connected to the reference ground of the electronic device 1. Still alternatively, the antenna assembly 10 itself does not have a reference ground, and the first ground 111 and the second ground 121 of the antenna assembly 10 are electrically connected to the reference ground of the electronic device 1 or the reference ground of the electronic devices within the electronic device 1 by direct electrical connection or indirectly by conductive members. In the present application, the antenna assembly 10 is disposed in the electronic device 1, and uses a metal layer on the motherboard 50 of the electronic device 1 as a reference ground. Namely, the first ground GND1 and the second ground GND2 are two ground points on the main board 50. Further, in an embodiment, each subsequent component is electrically connected to ground, which may refer to a reference ground that is electrically connected to the motherboard 50.

The first radiator 110 and the second radiator 120 can be capacitively coupled through the coupling slit 110 a. Alternatively, the first and second radiators 110, 120 may be aligned or substantially aligned (i.e., with a small tolerance in the design process). Of course, in other embodiments, the first radiator 110 and the second radiator 120 may be further disposed in a staggered manner in the extending direction, so as to form an avoidance space, etc.

Referring to fig. 4, the first coupling end 112 is opposite to and spaced apart from the second coupling end 122. The coupling slit 110a is a break between the first and second radiators 110 and 120, and for example, the width of the coupling slit 110a may be 0.5 to 2mm, but is not limited to this size. The first radiator 110 and the second radiator 120 can be regarded as two parts formed by the radiator being partitioned by the coupling slit 110 a.

The first radiator 110 and the second radiator 120 are capacitively coupled through the coupling slit 110 a. The "capacitive coupling" refers to that an electric field is generated between the first radiator 110 and the second radiator 120, a signal of the first radiator 110 can be transmitted to the second radiator 120 through the electric field, and a signal of the second radiator 120 can be transmitted to the first radiator 110 through the electric field, so that the first radiator 110 and the second radiator 120 can realize electric signal conduction even in a state of not directly contacting or not directly connecting.

It is to be understood that the shape, configuration and material of the first radiator 110 and the second radiator 120 are not particularly limited, and the shapes of the first radiator 110 and the second radiator 120 include, but are not limited to, strips, sheets, rods, coatings, films, and the like. When the first radiator 110 and the second radiator 120 are in a strip shape, the extending track of the first radiator 110 and the second radiator 120 is not limited in this application, so the first radiator 110 and the second radiator 120 can all extend along a track such as a straight line, a curve, or a multi-section bend. The first radiator 110 and the second radiator 120 may have a uniform width on the extending track, or may have a gradually-changed width and a strip shape with a widened region or the like.

The first matching circuit M1 is used for adjusting the electrical length of the first radiator 110. Since the first matching circuit M1 is configured to adjust the electrical length of the first radiator 110, the first matching circuit M1 can adjust the resonant mode supported by the first radiator 110, thereby adjusting the resonant frequency band supported by the first radiator 110 and the resonant frequency point of the resonant frequency band. The first matching circuit M1 may include at least one of a switching device, a capacitive device, an inductive device, a resistive device, and the like. The detailed structure of the first matching circuit M1 will be described later.

The second matching circuit M2 is configured to adjust an electrical length of the second radiator 120. Since the second matching circuit M2 is configured to adjust the electrical length of the second radiator 120, the second matching circuit M2 can adjust the resonant mode supported by the second radiator 120, thereby adjusting the resonant frequency band supported by the second radiator 120 and the resonant frequency point of the resonant frequency band. The second matching circuit M2 may include at least one of a switching device, a capacitive device, an inductive device, a resistive device, and the like. The detailed structure of the second matching circuit M2 will be described later.

In this embodiment, the second matching circuit M2 is electrically connected to ground, but this should not be construed as limiting the application, and in other embodiments, the second matching circuit M2 may also be electrically connected to other feeds, which will be described in detail later.

Referring to fig. 8, in the present simulation, the horizontal axis is frequency, and the unit is GHz; the vertical axis is the S parameter (S Parameters) in dB. Each trough in the curve of the simulation graph corresponds to a resonance frequency point of a resonance mode. As can be seen from this simulation, the curve has a plurality of valleys and, therefore, the antenna assembly 10 has a plurality of resonant modes. It should be understood that the number of resonant modes shown in this embodiment should not be construed as limiting the antenna assembly 10 provided in this embodiment. Referring to point 1, the resonant mode at point 1 is used to support the UWB band. In the simulation diagram, the UWB frequency band is UWB CH9 frequency band (the frequency range is 7.75 GHz-8.25 GHz, and the center frequency point is 8 GHz).

In addition, as can be seen from fig. 6, the antenna assembly 10 has high efficiency in the CH5 band (the frequency range is 6.25GHz to 6.75GHz, and the center frequency point is 6.5 GHz) in the UWB band, and therefore, the antenna assembly 10 also supports the CH5 band of the UWB band. In summary, the antenna assembly 10 provided in the embodiments of the present application can support both the CH5 band and the CH9 band. The user can select the CH5 frequency band or the CH9 frequency band of the antenna assembly 10 to work according to the actual requirement.

Because the antenna assembly 10 provided in the embodiment of the present application is configured such that the first radiator 110 is capacitively coupled to the second radiator 120, that is, the first radiator 110 and the second radiator 120 are co-aperture. When the first feed source S1 works, not only the first radiator 110 but also the second radiator 120 can be utilized, in other words, the first feed source S1 can excite not only the resonant current on the first radiator 110 but also the resonant current on the second radiator 120. Compared to the first feed source S1 that can only use the first radiator 110 alone, the antenna assembly 10 provided in the embodiment of the present application can use the second radiator 120 in addition to the first radiator 110, so as to generate more resonant modes. Therefore, the antenna assembly 10 can support more frequency bands, and the antenna assembly 10 has better communication performance. In another aspect, compared to the related art, in which a single radiator supports one frequency band, the antenna assembly 10 provided in the embodiment of the present application sufficiently multiplexes the first radiator 110 and the second radiator 120 while supporting the required frequency band, so that the lengths of the first radiator 110 and the second radiator 120 can be reduced. In addition, compared to the related art UWB antenna that is separately disposed on the motherboard bracket 60, in the antenna assembly 10 provided in this embodiment of the present invention, one of the plurality of resonant modes may support a UWB frequency band, and the frequency bands supported by the rest of the plurality of resonant modes are different from the UWB frequency bands, so that the UWB frequency band in the antenna assembly 10 may share one antenna assembly 10 with other frequency bands, without separately setting the UWB antenna, which is beneficial to improving the integration level of the antenna assembly 10.

Further, since the related art UWB antenna is separately provided on the main board support 60, the main lobe of the directional pattern of the UWB antenna is shown in the figure (refer to fig. 45) -Z direction, and the directional coefficient of the Z direction is low. That is, the radiation direction of the related art is a direction directed outward from the rear camera. In other words, the pattern of the UWB antenna in the related art is directional. In some limit cases, for example, the electronic device 1 of the UWB antenna of the related art is placed in a pocket of trousers, and because of the orientation of the pattern of the UWB antenna, when the terminal device 5 transmits a ranging signal (which is a UWB band) to the electronic device 1, the UWB antenna of the electronic device 1 may be completely blocked from receiving the ranging signal. Therefore, the terminal device 5 cannot search for the electronic device 1. The antenna assembly 10 according to the embodiment of the present application may share one antenna assembly 10 with other frequency bands, and the position setting of the antenna assembly 10 may be more flexible, for example, the antenna assembly may be integrated in the housing 30 of the electronic device 1, disposed on the surface of the housing 30, or disposed in an accommodating space surrounded by the housing 30. When the antenna assembly 10 provided in the embodiments of the present application is more flexible in design, the antenna assembly 10 provided in the embodiments of the present application has a greater application potential than the UWB antenna of the related art. The housing 30 includes a back plate 320 and a middle frame 310. When the antenna assembly 10 provided in the embodiment of the present application is disposed on the middle frame 310 (i.e., used as a middle frame antenna), the omni-directional performance is better. When a terminal device 5 sends a ranging signal to the electronic device 1, the antenna assembly 10 of the electronic device 1 may receive the ranging signal, and thus, the electronic device 1 may transmit a feedback signal to the terminal device 5 according to the ranging signal, and the terminal device 5 may calculate a distance between the electronic device 1 and the terminal device 5 according to the feedback signal.

With continued reference to fig. 7, in this embodiment, the second matching circuit M2 is electrically connected to ground. The first radiator 110 further has a second connection point G, which is located between the first ground terminal 111 and the first coupling terminal 112, and the second connection point G is spaced from the feeding point F. The antenna assembly 10 further comprises a third matching circuit M3. The third matching circuit M3 is electrically connected to the second connection point G, and the third matching circuit M3 is electrically connected to ground. In the present embodiment, the second matching circuit M2 is electrically connected to the third ground point GND3 to be grounded; the third matching circuit M3 is electrically connected to the fourth ground GND4 for ground.

The second matching circuit M2 may be electrically connected to the third ground GND3 by, but not limited to, direct electrical connection (such as soldering), or indirect electrical connection by means of coaxial lines, microstrip lines, conductive clips, conductive adhesives, etc.

The third matching circuit M3 may be electrically connected to the fourth ground GND4 by, but not limited to, direct electrical connection (such as soldering), or indirect electrical connection by means of coaxial lines, microstrip lines, conductive clips, conductive adhesives, etc.

The third matching circuit M3 is used for adjusting the electrical length of the first radiator 110. Since the third matching circuit M3 is configured to adjust the electrical length of the first radiator 110, the third matching circuit M3 can adjust the resonant mode supported by the first radiator 110, thereby adjusting the resonant frequency band supported by the first radiator 110 and the resonant frequency point of the resonant frequency band. It should be noted that, according to the subsequent main current flow schematic diagram, as long as the main current corresponding to a certain resonant mode flows through the third matching circuit M3, the third matching circuit M3 has an adjusting effect on the frequency band supported by the corresponding resonant mode.

In the antenna assembly 10 provided in this embodiment, the third matching circuit M3 is further included, and the third matching circuit M3 adjusts the electrical length of the first radiator 110, thereby adjusting the resonant frequency band supported by the first radiator 110 and the resonant frequency point of the resonant frequency band, so that the antenna assembly 10 has better communication performance.

Furthermore, in the present embodiment, the second connection point G is away from the coupling slit 110a compared to the feeding point F. In other embodiments, the second connection point G is adjacent to the coupling slot 110a compared to the feeding point F. When the second connection point G is away from the coupling slot 110a compared to the feeding point F, the first feed source S1 in the antenna assembly 10 may excite more resonant modes, so that the antenna assembly 10 may support more frequency bands, and the frequency band supportable by the antenna assembly 10 may have a larger width.

Referring to fig. 9, fig. 9 is a schematic structural diagram of an antenna assembly according to another embodiment of the present application. The antenna assembly 10 shown in fig. 9 has fewer third matching circuits M3 than the antenna assembly 10 shown in fig. 7, which is the antenna assembly 10 shown in fig. 9. The S-parameter diagram corresponding to the antenna assembly 10 shown in fig. 9 can also be seen in fig. 5, and the efficiency diagram of the antenna assembly 10 shown in fig. 9 can also be seen in fig. 6.

Referring to fig. 8 and fig. 10 together, fig. 10 is a schematic diagram of main current flow corresponding to a first resonant mode of an antenna assembly according to an embodiment of the present application. Referring to point 1, the resonant mode at point 1 is used to support the UWB band. The plurality of resonant modes includes a first resonant mode. The first resonant mode is used for supporting the UWB band, and the first resonant mode is a 5/4 wavelength mode from the second ground terminal 121 to the coupling slot 110 a.

In this embodiment, the first resonant mode is a 5/4 wavelength mode from the first matching circuit M1 to the coupling slot 110a, so that the antenna assembly 10 can fully utilize the higher order mode of the second radiator 120, which is beneficial to reducing the electrical length of the second radiator 120, thereby saving the space of the antenna assembly 10. When the antenna assembly 10 is used in an electronic device, it is convenient to lay out in the electronic device.

It should be noted that, for convenience of explanation of the main characteristic of each mode, the currents corresponding to each resonant mode are individually illustrated, however, when each mode is operated, the first radiator 110 and the second radiator 120 are not completely independent, and there is coupling between the first radiator 110 and the second radiator 120, that is, there is coupling between the first radiator 110 and the second radiator 120. Accordingly, the current of the first radiator 110 flows to the second radiator 120 through the coupling action, and accordingly, the current of the second radiator 120 flows to the first radiator 110 through the coupling action. However, the explanation of the principal characteristic appearance of each resonant mode herein is not affected. The flow of each current is merely schematic, and does not represent the actual current intensity or the position of the current zero point where two currents flowing in opposition act together.

The current corresponding to the first resonance mode is named as a first current I ₁ The first current I ₁ Comprising a first sub-current I ₁₁ Second sub-current I ₁₂ Third sub-current I ₁₃ . The first sub-current I ₁₁ From the reference ground to the second ground 121 and from the second ground 121 to the first connection point E. The second sub-current I ₁₂ At the first sub-current I ₁₁ And the third sub-current I ₁₃ And the second sub-current I ₁₂ Is directed from the first connection point E to the second ground 121. The third sub-current I ₁₃ In a direction from the first connection point E to the second coupling end 122.

Note that, the distribution of the first current corresponding to the first resonant mode is not the same at any time: the first sub-current I ₁₁ From the reference ground to the second ground 121 and from the second ground 121 to the first connection point E. The second sub-current I ₁₂ At the first sub-current I ₁₁ And the third sub-current I ₁₃ And the second sub-current I ₁₂ Is directed from the first connection point E to the second ground 121. The flow direction of the first current is as followsThe frequency supported by the first resonant mode (the frequency at the resonant frequency point of the first resonant mode) corresponding to the first current periodically changes, and in a first period of one period, the first current corresponding to the first resonant mode satisfies: the first sub-current I ₁₁ From the reference ground to the second ground 121 and from the second ground 121 to the first connection point E. The directions in the first sub-current, the second sub-current, and the third sub-store of the first current are reversed and illustrated for a second period of one cycle. Specifically, in the second period of one cycle: the first sub-current I ₁₁ From the first connection point E to the second ground 121 and from the second ground 121 to the reference ground; the second sub-current I ₁₂ Is directed from the second ground 121 to the first connection point E; the third sub-current I ₁₃ In a direction from the second coupling end 122 to the first connection point E.

In other words, the first current corresponding to the first resonant mode is periodically changed. Wherein the period includes a first period of time and a second period of time.

When the main current distribution corresponding to each mode is described, only the flow direction of the main current in the first period of one period is described and illustrated, and it can be understood that the flow direction of the main current in the second period of one period is opposite to the flow direction of the main current in the first period.

Further, referring to fig. 8 and 11, fig. 11 is a schematic diagram of main current flow corresponding to the second resonant mode of the antenna assembly according to the embodiment of the present application. The plurality of resonant modes also includes a second resonant mode, a third resonant mode, and a fourth resonant mode. The second resonance mode, the third resonance mode and the fourth resonance mode are used for supporting WiFi 7 frequency bands. The second resonant mode, the third resonant mode and the fourth resonant mode are described in detail below. The plurality of resonant modes further includes a second resonant mode, and in fig. 8, the resonant mode corresponding to the point 2 is the second resonant mode. The second resonant mode is a 3/4 wavelength mode from the coupling slot 110a to the second ground 121.

In this embodiment, the second resonant mode is a 3/4 wavelength mode from the coupling slot 110a to the second ground 121, so that the antenna assembly 10 can fully utilize the higher order mode of the second radiator 120, which is beneficial to reduce the electrical length of the second radiator 120, thereby saving the space of the antenna assembly 10. When the antenna assembly 10 is used in an electronic device, it is convenient to lay out in the electronic device.

The current corresponding to the second resonance mode is named as a second current I ₂ The second current I ₂ Including a fourth sub-current I ₂₁ Fifth sub-current I ₂₂ . The fourth sub-current I ₂₁ From the coupling slot 110a to the second ground 121, the fifth sub-current flows from I ₂₂ From the second ground GND2 to the second ground 121.

Referring to fig. 8 and fig. 12 together, fig. 12 is a schematic diagram of main current flow corresponding to a third resonant mode of the antenna assembly according to the embodiment of the present application. In fig. 8, the resonant mode corresponding to the point 3 is a third resonant mode, and the third resonant mode is a ring mode from the first feed source S1 to the first ground point GND 1.

In this embodiment, the third resonant mode is a ring mode from the first feed S1 to the first ground GND1, which is also called a half LOOP mode or a 1/2 wavelength mode. The third resonant mode of the antenna assembly 10 provided in this embodiment of the present application uses the loop mode from the first feed source S1 to the first ground point GND1, which is favorable for reducing the electrical length of the first radiator 110, thereby saving the space of the antenna assembly 10. When the antenna assembly 10 is used in an electronic device, it is convenient to lay out in the electronic device.

The current corresponding to the third resonance mode is named as a third current I ₃ The second current I ₃ Including a sixth sub-current I ₃₁ Seventh sub-electricStream I ₃₂ . Wherein the sixth sub-current I ₃₁ Is directed from the first feed S1 to the feed point F and from the feed point F toward the first ground 111. The seventh sub-current I ₃₂ The direction of the flow is from the first ground GND1 to the first ground 111, and from the first ground 111 toward the feeding point F.

Referring to fig. 8 and fig. 13 together, fig. 13 is a schematic diagram illustrating main current flow corresponding to a fourth resonant mode of the antenna assembly according to the embodiment of the present application. In fig. 8, the corresponding resonant mode at point 4 is the fourth resonant mode. The fourth resonant mode is a 1/4 wavelength mode of the first feed S1 to the coupling slot 110 a.

In this embodiment, the fourth resonant mode is a 1/4 wavelength mode from the first feed source S1 to the coupling slot 110 a. The 1/4 wavelength mode is a resonant mode with relatively high efficiency, so that the transmission and reception efficiency of the supported frequency band can be enhanced. The current corresponding to the fourth resonance mode is named as a fourth current I ₄ . The fourth current I ₄ From the first feed S1 to the coupling slot 110a.

Referring to fig. 8 and fig. 14 together, fig. 14 is a schematic diagram of main current flow corresponding to a fifth resonant mode of the antenna assembly according to the embodiment of the present application. The first ground 111 is electrically connected to a first ground GND1, and the antenna assembly 10 further comprises a ground system having a second ground GND2, and the second ground 121 is electrically connected to the second ground GND2. The plurality of resonant modes also includes a fifth resonant mode and a sixth resonant mode. The fifth resonance mode is used for supporting an LTE frequency band and an NR frequency band, and the sixth resonance mode is used for supporting the LTE frequency band and the NR frequency band. The fifth resonance mode and the sixth resonance mode are described in detail below.

In fig. 8, the corresponding resonant mode at point 5 is the fifth resonant mode. The fifth resonance mode is a 3/4 wavelength mode in which the coupling slot 110a to the second ground 121 are electrically connected to the second ground GND2.

In this embodiment, the fifth resonant mode is a 3/4 wavelength mode in which the coupling slot 110a to the second ground 121 are electrically connected to the second ground GND2, so that the antenna assembly 10 can fully utilize the higher order mode of the second radiator 120, which is advantageous for reducing the electrical length of the second radiator 120, thereby saving the space of the antenna assembly 10. When the antenna assembly 10 is used in an electronic device, it is convenient to lay out in the electronic device.

The current corresponding to the fifth resonance mode is named as a fifth current I ₅ The fifth current I ₅ Including an eighth sub-current I ₅₁ Ninth sub-current I ₅₂ . The eighth sub-current I ₅₁ The ninth sub-current I flows from the coupling slot 110a to the second ground 121 and from the second ground 121 to the second ground GND2 through the second ground 121 ₅₂ To be at the eighth sub-current I ₅₁ A current excited on the ground system, the ninth sub-current I ₅₂ Is that the second ground 121 points in the direction of the second coupling 122.

Referring to fig. 8 and 15 together, fig. 15 is a schematic diagram of main current flow corresponding to a sixth resonant mode of the antenna assembly according to the embodiment of the present application. In fig. 8, the corresponding resonant mode at point 6 is the sixth resonant mode. The sixth resonant mode is a 1/4 wavelength mode of the second matching circuit M2 to the coupling slot 110 a.

In the present embodiment, the sixth resonant mode is a 1/4 wavelength mode from the second matching circuit M2 to the coupling slot 110a, and the 1/4 wavelength mode is a resonant mode with relatively high efficiency, so that the transmission/reception efficiency of the supported frequency band can be enhanced. The current corresponding to the sixth resonance mode is named as a sixth current I ₆ . The sixth current I ₆ From the second matching circuit M2 to the coupling slit 110a.

As can be seen from the above description, the number of resonant modes supported by the antenna assembly 10 provided in the embodiment of the present application is greater, the number of frequency bands covered by the antenna assembly 10 is greater, and the width of the frequency bands is wider. Specifically, in this embodiment, as can be seen from fig. 8, when the frequency bands supported by the multiple resonance modes of the antenna assembly 10 are all continuous, the frequency band supported by the antenna assembly 10 is wider, so that an ultra-wideband can be formed, thereby realizing ultra-wideband coverage, improving the download bandwidth, improving the throughput download speed, and improving the internet experience of the user. In other embodiments, the frequency bands supported by the multiple resonant modes of the antenna assembly 10 are discontinuous, and the number of frequency bands supported by the antenna assembly 10 is relatively large, so as to achieve multi-band coverage, where the frequency bands supported by the multiple resonant modes are continuous, that is, two adjacent frequency bands supported by the multiple resonant modes are at least partially overlapped. The frequency band discontinuity supported by the multiple resonance modes means that no coincidence exists between two adjacent frequency bands supported by the multiple resonance modes.

Referring to fig. 8, in the present embodiment, the second connection point G is away from the coupling slot 110a compared to the feeding point F. When the second connection point G is away from the coupling slot 110a compared to the feeding point F, the antenna assembly 10 can excite a seventh resonance mode and an eighth resonance mode in addition to the first resonance mode, the second resonance mode, the third resonance mode, the fourth resonance mode, the fifth resonance mode and the sixth resonance mode. Thereby enabling the antenna assembly 10 to support more frequency bands.

Referring to fig. 10, the antenna assembly 10 further includes a fourth matching circuit M4. The second ground terminal 121 is electrically connected to the fourth matching circuit M4 and ground.

The fourth matching circuit M4 is configured to adjust an electrical length of the second radiator 120. Since the fourth matching circuit M4 is configured to adjust the electrical length of the second radiator 120, the fourth matching circuit M4 can adjust the resonant mode supported by the second radiator 120, thereby adjusting the resonant frequency band supported by the second radiator 120 and the resonant frequency point of the resonant frequency band.

Further, a capacitor may be included in the fourth matching circuit M4. When the fourth matching circuit M4 includes a capacitor, the second radiator 120 may serve as a detection branch for detecting an electromagnetic wave absorption ratio (SpecificAbsorption Rate, SAR) value. The capacitor in the fourth matching circuit M4 is used for isolating direct current, so as to prevent interference of current in the ground system or the first feed source S1 on detection of the second radiator 120, so that the detection accuracy of the second radiator 120 is higher. Specifically, the second radiator 120 forms an equivalent capacitance with a target object (such as a human body, or an animal body). When the target organism approaches the second radiator 120, the capacitance value of the equivalent capacitance formed by the second radiator 120 and the target organism becomes large; as the target organism moves away from the second radiator 120, the capacitance value of the equivalent capacitance formed by the second radiator 120 and the target organism decreases. The second radiator 120 is electrically connected to a SAR chip (also referred to as a SAR IC or a SAR sensor) to transfer a capacitance value of the equivalent capacitance to the SAR chip, and the SAR chip transmits the magnitude of the capacitance value to a processor, which controls the transmission power of the first feed S1 according to the change of the capacitance value. Specifically, when the target organism approaches the second radiator 120, the equivalent capacitance value increases, and the processor controls the first feed source S1 to reduce the emission power so as to prevent injury caused by radiation of the target organism by the second radiator 120 when the target organism approaches the second radiator 120. The capacitance value of the capacitor may be, but is not limited to, 220pF. It will be appreciated that in other embodiments, the antenna assembly 10 may not include the fourth matching circuit M4, and accordingly, the second ground terminal 121 is directly electrically connected to ground.

The plurality of resonant modes also includes a seventh resonant mode and an eighth resonant mode. Referring to fig. 8, 16 and 17, fig. 16 is a schematic diagram illustrating main current flow corresponding to a seventh resonant mode of the antenna assembly according to the embodiment of fig. 8; fig. 17 is a schematic diagram of main current flow corresponding to the eighth resonant mode of the antenna assembly provided in the embodiment of fig. 8. In fig. 8, the resonance mode corresponding to the point 7 is the seventh resonance mode, and the resonance mode corresponding to the point 8 is the eighth resonance mode.

The seventh resonance mode is a ring mode of the third matching circuit M3 to the second matching circuit M2. The seventh resonance mode is used for supportingAnd supporting an LTE frequency band and an NR frequency band. In the present embodiment, the seventh resonance mode is a ring mode of the third matching circuit M3 to the second matching circuit M2, which is also called a half LOOP mode, or a 1/2 wavelength mode. The seventh resonant mode of the antenna assembly 10 provided in this embodiment is a loop mode from the third matching circuit M3 to the second matching circuit M2, which is favorable for reducing the electrical lengths of the first radiator 110 and the second radiator 120, so that the space of the antenna assembly 10 is saved. When the antenna assembly 10 is used in an electronic device, it is convenient to lay out in the electronic device. The current corresponding to the seventh resonance mode is named as a seventh current I ₇ . The seventh current I ₇ Flows from the third matching circuit M3 to the first coupling end 112 and from the second coupling end 122 to the second matching circuit M2.

The eighth resonance mode is a ring mode of the third matching circuit M3 to the first matching circuit M1. The eighth resonance mode is used for supporting an LTE frequency band and an NR frequency band. The eighth resonant mode is a loop mode from the third matching circuit M3 to the first matching circuit M1, which is beneficial to reduce the electrical lengths of the first radiator 110 and the second radiator 120, thereby saving the space of the antenna assembly 10. When the antenna assembly 10 is used in an electronic device, it is convenient to lay out in the electronic device. The current corresponding to the eighth resonance mode is named as eighth current I ₈ . The eighth current I ₈ From the third matching circuit M3 to the fourth matching circuit M4.

Referring to fig. 18, fig. 18 is a schematic diagram of an antenna assembly according to another embodiment of the present application. The antenna assembly 10 includes a first feed source S1, a first matching circuit M1, a second matching circuit M2, a first radiator 110, and a second radiator 120. The first radiator 110 has a first ground 111, a first coupling 112, and a feeding point F. The first grounding end 111 is grounded, and the feeding point F is located between the first grounding end 111 and the first coupling end 112 and electrically connects the first matching circuit M1 to the first feed source S1. The second radiator 120 has a second grounding end 121, a second coupling end 122 and a first connection point E. The second ground terminal 121 is electrically connected to ground. The second coupling end 122 is coupled with the first coupling end 112 and there is a coupling gap 110a. The first connection point E is located between the second ground terminal 121 and the second coupling terminal 122, and is electrically connected to the second matching circuit M2. The first radiator 110 and the second radiator 120 support a plurality of resonance modes under the excitation of the first feed source S1, wherein one of the plurality of resonance modes is used for supporting a UWB band, and the rest of the plurality of resonance modes support a band different from the UWB band.

In this embodiment, the second matching circuit M2 is electrically connected to ground, the first radiator 110 further has a second connection point G, the second connection point G is located between the first ground terminal 111 and the first coupling terminal 112, and the second connection point G is spaced from the feeding point F, and the antenna assembly 10 further includes a third matching circuit M3 and a second feed source S2. The second feed source S2 is electrically connected to the third matching circuit M3 to the second connection point G, and the first radiator 110 supports a Low frequency (Low Band, LB) Band and a GPS L5 Band under the excitation of the second feed source S2.

The third matching circuit M3 is used for adjusting the electrical length of the first radiator 110. Since the third matching circuit M3 is configured to adjust the electrical length of the first radiator 110, the third matching circuit M3 can adjust the resonant mode supported by the first radiator 110, thereby adjusting the resonant frequency band supported by the first radiator 110 and the resonant frequency point of the resonant frequency band.

The LB band means a band having a frequency lower than 1000MHz, that is, a frequency f of a low frequency band satisfies: f < 1000MHz (i.e., 1 GHz).

In this embodiment, the antenna assembly 10 includes the second feed source S2, so the antenna assembly 10 may also support LB frequency bands, so that the antenna may communicate using the LB frequency bands, thereby improving the number of frequency bands supported by the antenna assembly 10 and improving the communication quality of the antenna assembly 10.

Referring to fig. 19, fig. 19 is a simulation diagram of S parameters corresponding to the second feed in the antenna assembly provided in fig. 18. The first ground 111 is electrically connected to a first ground GND1, and the first radiator 110 generates a ninth resonant mode under the excitation of the second feed source S2, and the ninth resonant mode is used for supporting the LB frequency band.

In the simulation diagram, the horizontal axis is frequency, and the unit is GHz; the vertical axis is the S parameter (S Parameters) in dB. The trough in the curve of the simulation diagram corresponds to one resonance mode. As can be seen from the simulation, the curve has a trough, and the frequency is less than 1GHz, so that the antenna assembly 10 can also operate in the LB frequency band.

Referring to fig. 20, fig. 20 is a schematic diagram of main current flow corresponding to the ninth resonant mode. The ninth resonance mode is a 1/4 wavelength mode of the first ground GND1 to the coupling slit 110 a.

In the present embodiment, the ninth resonance mode is a 1/4 wavelength mode from the first ground GND1 to the coupling slot 110a, and the 1/4 wavelength mode is a resonance mode with relatively high efficiency, so that the transmission/reception efficiency of the supported frequency band can be enhanced. The current corresponding to the ninth resonance mode is named as a ninth current I ₉ . The ninth current I ₉ From the first ground GND1 to the coupling slit 110a.

In the present embodiment, the length of the first radiator 110 is 1/8 wavelength to 1/4 wavelength of the LB band. Specifically, the length of the first radiator 110 is 1/8 to 1/4 times of the wavelength corresponding to the LB frequency band, so that the ninth resonant mode is excited on the first radiator 110, and the frequency band supported by the ninth resonant mode has higher radiation efficiency.

Generally, by designing the length of the first radiator 110 to be 1/4 times of the wavelength of the exciting current sent to the first radiator 110 by the second feed source S2 in the medium, the radiating efficiency is high because the exciting current is easy to excite at the resonance frequency point (named as f 9) corresponding to the ninth resonance mode. Further, by providing the grounded capacitive third matching circuit M3 on the path of the resonant current corresponding to the ninth resonant mode, so as to realize capacitive coupling and feeding into the first radiator 110, the capacitive loading can shift the resonant frequency corresponding to the ninth resonant mode towards a low frequency, so that the resonant frequency does not follow the original requirement to generate higher-efficiency resonance at the wavelength of about 1/4 of the length of the first radiator 110, but can generate higher-efficiency resonance within the range of 1/8-1/4 of the length of the first radiator 110, so that the resonant frequency corresponding to the original ninth resonant mode can be formed, and meanwhile, the length of the corresponding first radiator 110 can be shortened, for example, the size of the first radiator 110 is further reduced to 1/8 times of the wavelength corresponding to the resonant frequency corresponding to the ninth resonant mode, and the stacking length of the antenna assembly 10 is further reduced.

Referring to fig. 21, fig. 21 is a schematic diagram of an antenna assembly according to another embodiment of the present application. In this embodiment, the antenna assembly 10 includes a first feed source S1, a first matching circuit M1, a second matching circuit M2, a first radiator 110, and a second radiator 120. The first radiator 110 has a first ground 111, a first coupling 112, and a feeding point F. The first grounding end 111 is grounded, and the feeding point F is located between the first grounding end 111 and the first coupling end 112 and electrically connects the first matching circuit M1 to the first feed source S1. The second radiator 120 has a second grounding end 121, a second coupling end 122 and a first connection point E. The second ground terminal 121 is electrically connected to ground. The second coupling end 122 is coupled with the first coupling end 112 and there is a coupling gap 110a. The first connection point E is located between the second ground terminal 121 and the second coupling terminal 122, and is electrically connected to the second matching circuit M2. The first radiator 110 and the second radiator 120 support a plurality of resonance modes under the excitation of the first feed source S1, wherein one of the plurality of resonance modes is used for supporting a UWB band, and the rest of the plurality of resonance modes support a band different from the UWB band.

In addition, the antenna assembly 10 further includes a third matching circuit M3 and a third feed source S3. The third matching circuit M3 is electrically connected to the second connection point G, and the third matching circuit M3 is electrically connected to ground. The third feed source S3 is electrically connected to the second matching circuit M2, and the first radiator 110 and the second radiator 120 support the GPS L1 band and the wifi2.4g band under the excitation of the third feed source S3.

In this embodiment, the antenna assembly 10 includes the third feed source S3, so the antenna assembly 10 may further support the GPS L1 frequency band and the wifi2.4g frequency band, so that the antenna may communicate using the GPS L1 frequency band and the wifi2.4g frequency band, thereby improving the number of frequency bands supported by the antenna assembly 10 and improving the communication quality of the antenna assembly 10.

In this embodiment, the length of the second radiator 120 is 1/4 wavelength corresponding to the resonance frequency point of the GPS L1 band.

By designing the length of the second radiator 120 to be 1/4 wavelength corresponding to the resonance frequency point of the GPS L1 frequency band, the excitation is easy to achieve higher radiation efficiency.

Referring to fig. 22, fig. 22 is a schematic diagram of an antenna assembly according to another embodiment of the present application. In this embodiment, the antenna assembly 10 includes a first feed source S1, a first matching circuit M1, a second matching circuit M2, a first radiator 110, and a second radiator 120. The first radiator 110 has a first ground 111, a first coupling 112, and a feeding point F. The first grounding end 111 is grounded, and the feeding point F is located between the first grounding end 111 and the first coupling end 112 and electrically connects the first matching circuit M1 to the first feed source S1. The second radiator 120 has a second grounding end 121, a second coupling end 122 and a first connection point E. The second ground terminal 121 is electrically connected to ground. The second coupling end 122 is coupled with the first coupling end 112 and there is a coupling gap 110a. The first connection point E is located between the second ground terminal 121 and the second coupling terminal 122, and is electrically connected to the second matching circuit M2. The first radiator 110 and the second radiator 120 support a plurality of resonance modes under the excitation of the first feed source S1, wherein one of the plurality of resonance modes is used for supporting a UWB band, and the rest of the plurality of resonance modes support a band different from the UWB band.

In the present embodiment, the antenna assembly 10 further includes a third matching circuit M3, a second feed source S2, a fourth matching circuit M4, and a third feed source S3. The second feed source S2 is electrically connected to the third matching circuit M3 to the second connection point G, and the first radiator 110 supports the LB frequency band under the excitation of the second feed source S2. The first feed source S1 electrically connects the fourth matching circuit M4 to the feed point F. The third feed source S3 is electrically connected to the second matching circuit M2, and the second radiator 120 supports the GPS L1 band and the wifi2.4g band under the excitation of the third feed source S3.

Referring to fig. 23, fig. 23 is a schematic diagram of S parameter corresponding to the third feed in the antenna assembly of fig. 22. In the simulation diagram, the horizontal axis is frequency, and the unit is GHz; the vertical axis is the S parameter (S Parameters) in dB. The trough in the curve of the simulation diagram corresponds to one resonance mode. It will be appreciated that the present simulation diagram is a simulation based on the antenna assembly shown in fig. 23, and that the current is subsequently illustrated based on the structure of the antenna assembly shown in fig. 23. It will be appreciated that the simulation based on the antenna assembly shown in fig. 22 can also obtain the S-parameter diagram, and the current flows in the same resonant mode are the same. As can be seen from the present schematic drawing, the third feed source S3 has three main modes, which are named as a tenth resonant mode (resonant mode corresponding to the point 1 in the drawing), an eleventh resonant mode (resonant mode corresponding to the point 2 in the drawing), and a twelfth resonant mode (resonant mode corresponding to the point 3 in the drawing). In other words, the antenna assembly also has a tenth resonant mode, an eleventh resonant mode, and a twelfth resonant mode.

Referring to fig. 24, fig. 24 is a schematic diagram of main current flow corresponding to the tenth resonant mode. The tenth resonance mode is a 1/4 wavelength mode from the point D where the first matching circuit M1 is electrically connected to the second ground terminal 121 to the coupling slot 110a. Correspondingly, the main current corresponding to the tenth resonance mode is named tenth current I ₁₀ The tenth current I ₁₀ And flows from the point D where the first matching circuit M1 is electrically connected to the second ground terminal 121 to the coupling slot 110a. The 1/4 wavelength mode is a resonance mode with relatively high efficiency, and in the present embodiment, the tenth resonance mode is a 1/4 wavelength mode from the point D to the coupling slot 110a, so thatAnd enhancing the receiving and transmitting efficiency of the frequency band supported by the tenth resonance mode.

Referring to fig. 25, fig. 25 is a schematic diagram of main current flow corresponding to the eleventh resonant mode. The eleventh resonance mode is a 1/4 wavelength mode of the first connection point E to the coupling slit 110a. The main current corresponding to the eleventh resonance mode is named eleventh current I ₁₁ The eleventh current I ₁₁ From the first connection point E to the coupling slit 110a. The 1/4 wavelength mode is a resonant mode with relatively high efficiency, and in this embodiment, the eleventh resonant mode is a 1/4 wavelength mode from the first connection point E to the coupling slot 110a, so that the transceiving efficiency of the frequency band supported by the eleventh resonant mode can be enhanced.

Referring to fig. 26, fig. 26 is a schematic diagram of main current flow corresponding to the twelfth resonant mode. The twelfth resonance mode is a homodromous current mode from the third feed source S3 to the first ground GND 1.

Therefore, the antenna assembly 10 according to the embodiment of the present application not only can support UWB frequency bands, but also can support LB frequency bands, GPS frequency bands and wifi2.4g frequency bands, and can support more frequency bands, thereby improving the number of frequency bands supported by the antenna assembly 10 and improving the communication quality of the antenna assembly 10.

In addition, the multiple resonance modes excited by the first feed source S1 in the antenna assembly 10 provided in this embodiment of the present application may be the same as those in the previous embodiment, and support UWB band, wiFi7 band, LTE band and NR band, and will be described in detail herein. Further, the number of frequency bands supported by the antenna assembly 10 is increased, and the communication quality of the antenna assembly 10 is improved.

In summary, the antenna assembly 10 in the embodiment of the present application can support the LB frequency band; GPS frequency band; and WIFI7 frequency band, LTE frequency band, NR frequency band, UWB frequency band. Therefore, the antenna assembly 10 provided in the embodiment of the present application can work in more frequency bands, and has better communication effect.

Since the antenna assembly 10 in the present embodiment includes the first feed S1, the second feed S2, and the third feed S3, the antenna assembly 10 includes three antennas, which are respectively designated as a first antenna, a second antenna, and a third antenna. The first antenna includes a first feed source S1, a first matching circuit M1, a first radiator 110, and a second radiator 120. The second antenna includes a second feed source S2, a first radiator 110, and a third matching circuit M3. The third antenna includes a third feed source S3, a second radiator 120, a second matching circuit M2, a fourth matching circuit M4, and a first radiator 110.

In this embodiment, the resonant modes and the corresponding currents are described above, and are not described herein.

The first matching circuit M1 or the second matching circuit M2 includes one or more sub-frequency selective filter circuits 113a including one or more of fig. 27 to 34. In other words, in the antenna assembly 10, the first matching circuit M1 includes one or more sub-frequency selective filter circuits 113a. And/or the second matching circuit M2 includes one or more sub-frequency selective filter circuits 113a.

In embodiments in which the third matching circuit M3 is included in the antenna assembly 10, the third matching circuit M3 includes one or more sub-frequency selective filter circuits 113a.

In embodiments in which the antenna assembly 10 includes a fourth matching circuit M4, the fourth matching circuit M4 includes one or more sub-frequency selective filter circuits 113a.

The sub-frequency selective filter circuit 113a is described in detail below. Referring to fig. 27 to 34 together, fig. 27 to 34 are schematic diagrams of sub-frequency selective filter circuits provided in various embodiments of the present application. The sub-frequency selective filter circuit 113a includes one or more of the following circuits.

Referring to fig. 27, the sub-band-selection filter circuit 113a in fig. 27 includes a band-pass circuit formed by connecting an inductance L0 and the capacitance C0 in series.

Referring to fig. 28, the sub-band-select filter circuit 113a in fig. 28 includes a band-stop circuit formed by connecting an inductance L0 and a capacitance C0 in parallel.

Referring to fig. 29, the sub-band selection filter circuit 113a in fig. 29 includes an inductor L0, a first capacitor C1, and a second capacitor C2. The inductance L0 is connected in parallel with the first capacitor C1, and the second capacitor C2 is electrically connected to a node where the inductance L0 is electrically connected to the first capacitor C1.

Referring to fig. 30, the sub-band-select filter circuit 113a in fig. 30 includes a capacitor C0, a first inductor L1, and a second inductor L2. The capacitor C0 is connected in parallel with the first inductor L1, and the second inductor L2 is electrically connected to a node where the capacitor C0 is electrically connected to the first inductor L1.

Referring to fig. 31, the sub-band selection filter circuit 113a in fig. 31 includes an inductor L0, a first capacitor C1, and a second capacitor C2. The inductor L0 is connected in series with the first capacitor C1, one end of the second capacitor C2 is electrically connected to the first end of the first capacitor C1, the other end of the second capacitor C2 is electrically connected to the first end of the first capacitor C1, and the first end of the second capacitor C0 is not connected to the first capacitor C1.

Referring to fig. 32, the sub-band-select filter circuit 113a in fig. 32 includes a capacitor C0, a first inductor L1, and a second inductor L2. The capacitor C0 is connected in series with the first inductor L1, one end of the second inductor L2 is electrically connected to one end of the capacitor C0, which is not connected to the first inductor L1, and the other end of the second inductor L2 is electrically connected to one end of the first inductor L1, which is not connected to the capacitor C0.

Referring to fig. 33, the sub-band selection filter circuit 113a in fig. 33 includes a first capacitor C1, a second capacitor C2, a first inductor L1, and a second inductor L2. The first capacitor C1 is connected in parallel with the first inductor L1, the second capacitor C2 is connected in parallel with the second inductor L2, and one end of the whole formed by connecting the second capacitor C2 and the second inductor L2 in parallel is electrically connected with one end of the whole formed by connecting the first capacitor C1 and the first inductor L1 in parallel. In other words, the first capacitor C1 is connected in parallel with the first inductor L1 to form a first unit 113b, the second capacitor C2 is connected in parallel with the second inductor L2 to form a second unit 113C, and the first unit 113b is connected in series with the second unit 113C.

Referring to fig. 34, in fig. 34, the sub-frequency-selective filter circuit 113a includes a first capacitor C1, a second capacitor C2, a first inductor L1, and a second inductor L2, wherein the first capacitor C1 and the first inductor L1 are connected in series to form a first unit 113b, the second capacitor C2 and the second inductor L2 are connected in series to form a second unit 113C, and the first unit 113b and the second unit 113C are connected in parallel.

Referring to fig. 35, fig. 35 is a schematic diagram illustrating isolation of each antenna unit in the antenna assembly provided in fig. 22. In the present schematic diagram, the horizontal axis is frequency, and the unit is GHz; the vertical axis is isolation in dB. Wherein, the curve (1) is the isolation between the third antenna and the first antenna; the curve (2) is the isolation between the third antenna and the second antenna; the curve (3) is the isolation between the first antenna and the second antenna. The simulation graph shows that the third antenna and the first antenna have good isolation, the third antenna and the second antenna have good isolation, and the first antenna and the second antenna have good isolation.

Referring to fig. 36, fig. 36 is a schematic view illustrating radiation efficiency of each antenna unit in the antenna assembly shown in fig. 22 when the antenna unit is applied to an electronic device. In the present schematic diagram, the horizontal axis is frequency, and the unit is GHz; the vertical axis is the radiation efficiency in dB. The curve (1) in the present schematic diagram is a System rad. Curve (2) is the system radiation efficiency curve of the first antenna; curve (3) is the system radiation efficiency curve of the second antenna; curve (4) is the System total efficiency (System to. Efficiency) curve of the third antenna; curve (5) is the overall system efficiency curve for the first antenna; curve (6) is the overall system efficiency curve for the second antenna. As can be seen from the curve (2) and the curve (5), the first antenna has a good radiation efficiency; as can be seen from the curve (3) and the curve (6), the second antenna has a better radiation efficiency; as can be seen from the curves (1) and (4), the third antenna has a good radiation efficiency.

When the first feed S1 in the antenna assembly 10 is operated and the second feed S2 and the third feed S3 are not operated, the second feed S2 and the third feed S3 are equivalent to 50 euclidean. The first feed S1 may still excite the first resonant mode, the second resonant mode, the third resonant mode, the fourth resonant mode, the fifth resonant mode, the sixth resonant mode, the seventh resonant mode, and the eighth resonant mode.

If the UWB ranging function is not added to the antenna assembly 10, only the second, third, fourth, fifth, sixth, seventh and eighth resonant modes corresponding to the first feed S1 in the antenna assembly 10 may be used. While the first resonant mode exists but is not utilized. Referring to fig. 37 specifically, fig. 37 is a schematic diagram of S parameters of the second to eighth resonance modes corresponding to the first feed source. When the UWB band is not utilized in the antenna assembly 10, the antenna assembly 10 supports the LB band+gps band+wifi 7 band+lte band+nr band, and has a large number of bands and a wide band.

Referring to fig. 22 as a basis, please refer to fig. 21 and 38 together, fig. 38 is a schematic diagram of S parameters corresponding to the first feed and the third feed in the antenna assembly shown in fig. 21. If the LB frequency band is not desired to be added, the antenna assembly 10 shown in fig. 21 is equivalent to the antenna assembly 10 shown in fig. 22 in that the second feed source S2 is removed from the antenna assembly 10 shown in fig. 22, and the third matching circuit M3 is electrically connected to the ground (i.e., the third matching circuit M3 is grounded), so that the antenna assembly 10 shown in fig. 21 is obtained. In other words, referring to fig. 21, the antenna assembly 10 shown in fig. 21 has fewer secondary feeds S2 than the antenna assembly 10 shown in fig. 22. As shown in fig. 38, the first feed S1 in the antenna assembly 10 shown in fig. 21 can still excite the first resonant mode, the second resonant mode, the third resonant mode, the fourth resonant mode, the fifth resonant mode, the sixth resonant mode, the seventh resonant mode and the eighth resonant mode, and the corresponding curves are shown in fig. 38 (1). In curve (1), point 1 corresponds to the first resonant mode, point 2 corresponds to the second resonant mode, point 3 corresponds to the third resonant mode, point 4 corresponds to the fourth resonant mode, point 5 corresponds to the fifth resonant mode, point 6 corresponds to the sixth resonant mode, point 7 corresponds to the seventh resonant mode, and point 8 corresponds to the eighth resonant mode. The third feed source S3 may still excite the tenth resonant mode, the eleventh resonant mode and the twelfth resonant mode, and the corresponding curves are shown in the curve (2) in fig. 38. In curve (2), point 9 corresponds to the tenth resonant mode, point 10 corresponds to the eleventh resonant mode, and point 11 corresponds to the twelfth resonant mode. It can be seen that the antenna assembly 10 can still support the GPS band+wifi 7 band+lte band+nr band+uwb band, with a large number of bands and width of bands.

Referring to fig. 22 as a basis, please refer to fig. 18 and 39 together, fig. 39 is a schematic diagram of S parameters corresponding to the first feed and the second feed in the antenna assembly shown in fig. 18. If it is not desired to add the GPS/WiFi 2.4G band, the antenna assembly 10 shown in fig. 18 corresponds to the antenna assembly shown in fig. 22, and the antenna assembly 10 shown in fig. 18 is obtained by removing the third feed source S3 in the antenna assembly 10 shown in fig. 22 and electrically connecting the second matching circuit M2 to the ground (i.e., the ground below the second matching circuit M2). In other words, the antenna assembly 10 shown in fig. 18 has fewer third feeds S3 than the antenna assembly 10 shown in fig. 22. As shown in fig. 39, the first feed S1 of the antenna assembly 10 shown in fig. 18 can still excite the first resonant mode, the second resonant mode, the third resonant mode, the fourth resonant mode, the fifth resonant mode, the sixth resonant mode, the seventh resonant mode and the eighth resonant mode, and the corresponding curve is shown in fig. 38 (1). In curve (1), point 1 corresponds to the first resonant mode, point 2 corresponds to the second resonant mode, point 3 corresponds to the third resonant mode, point 4 corresponds to the fourth resonant mode, point 5 corresponds to the fifth resonant mode, point 6 corresponds to the sixth resonant mode, point 7 corresponds to the seventh resonant mode, and point 8 corresponds to the eighth resonant mode. The second feed source S2 may still excite the ninth resonant mode, and the corresponding curve is shown in curve (2). In curve (2), point 9 corresponds to the ninth resonant mode. The antenna assembly 10 provided in this embodiment supports LB band+wifi 7 band+lte band NR band+uwb band.

Referring to fig. 22 together with fig. 10 and 8, if it is not desired to add the LB frequency band, the GPS frequency band, and the WiFi 2.4G frequency band, it is equivalent to removing the second feed source S2 and the third feed source S3 in the antenna assembly 10 shown in fig. 22, electrically connecting the second matching circuit M2 to the ground (i.e., the second matching circuit M2 is grounded), and electrically connecting the third matching circuit M3 to the ground (i.e., the third matching circuit M3 is grounded), thereby obtaining the antenna assembly 10 shown in fig. 10. In other words, the antenna assembly 10 shown in fig. 10 has fewer third feeds S3 than the antenna assembly 10 shown in fig. 22. As can be seen in fig. 8, the first feed S1 in the antenna assembly 10 can still excite the first resonant mode, the second resonant mode, the third resonant mode, the fourth resonant mode, the fifth resonant mode, the sixth resonant mode, the seventh resonant mode and the eighth resonant mode, and the corresponding curves are shown in fig. 8. In the curve, point 1 corresponds to the first resonant mode, point 2 corresponds to the second resonant mode, point 3 corresponds to the third resonant mode, point 4 corresponds to the fourth resonant mode, point 5 corresponds to the fifth resonant mode, point 6 corresponds to the sixth resonant mode, point 7 corresponds to the seventh resonant mode, and point 8 corresponds to the eighth resonant mode. It follows that the antenna assembly 10 may support a WiFi 7 band + LTE band + NR band + UWB band.

In the above description, when the first feed source S1 is used for exciting the UWB band, the UWB CH5 band and the UWB CH9 band may be covered at the same time. The antenna assembly 10 may be selected to support the UWB CH5 band, or the UWB CH9 band, depending on the actual channel requirements. When the antenna assembly 10 supports the UWB CH5 band, the antenna assembly 10 is typically used to measure the angle between the electronic device 1 to which the antenna assembly 10 is applied and the terminal device 5, in other words, the antenna assembly 10 functions as an angle measuring antenna. When the antenna assembly 10 supports the UWB CH9 band, the antenna assembly 10 is generally used to measure the distance between the electronic device 1 to which the antenna assembly 10 is applied and the terminal device 5, in other words, the antenna assembly 10 may be used as a ranging antenna.

Referring to fig. 40 and fig. 22 together, fig. 40 is a schematic diagram of an antenna assembly according to another embodiment of the present application. In the antenna assembly 10 of fig. 40, compared to the antenna assembly 10 of fig. 22, the second connection point G is disposed adjacent to the coupling slot 110a compared to the feeding point F in the present embodiment. That is, the positions of the first feed source S1 and the second feed source S2 are interchanged, and the positions of the feed point G where the first feed source S1 is electrically connected to the first radiator 110 and the second connection point G where the first feed source S1 is electrically connected to the first radiator 110 are changed. In this embodiment, the frequency band supported by the first feed source S1 is substantially the same as the resonant mode excited by the first feed source S1 in the antenna assembly 10 provided in fig. 22 and related embodiments, and the antenna assembly 10 provided in this embodiment may excite the first resonant mode, the second resonant mode, the third resonant mode, the fourth resonant mode, the fifth resonant mode, the sixth resonant mode, the seventh resonant mode, and the eighth resonant mode.

When the antenna assembly 10 is applied to the electronic device 1, the antenna assembly 1 may be disposed at any position of the electronic device 1. In an embodiment, the first radiator 110 and the second radiator 120 in the antenna assembly 1 are disposed at the corner where two connected frames of the electronic device 1 are connected. Referring to fig. 41 and 42, fig. 41 is a schematic diagram of an antenna assembly according to an embodiment of the present application; fig. 42 is a schematic view of the antenna assembly of fig. 41 in an electronic device. The antenna assembly 10 also has a ground system 150, which ground system 150 may be, but is not limited to, a metal layer in a motherboard, or a metal plate, etc. The electronic device 1 further includes a housing 30, and the antenna assembly 30 is accommodated in the housing 30.

Referring to fig. 1, 2 and 3, the antenna assembly 10 is disposed in the electronic device 1, and the electronic device 1 is taken as an example of a mobile phone. Referring to fig. 1 to 3, in one embodiment, the electronic device 1 includes a housing 30 and the antenna assembly 10 according to any of the previous embodiments. At least one of the first radiator 110 and the second radiator 120 of the antenna assembly 10 is integrated with the housing 30, or is disposed on a surface of the housing 30, or is disposed in an accommodating space surrounded by the housing 30. In one embodiment, the housing 30 includes a middle frame 310 and a back plate 320. The middle frame 310 includes a carrying portion 311 and a frame portion 312. The frame 312 is bent and connected to the periphery of the bearing 311, and protrudes from two opposite sides of the bearing 311. The housing 30 is disposed at one side of the carrying portion 311, and is accommodated in a space formed by the carrying portion 311 and the frame portion 312.

In an embodiment, at least one of the first radiator 110 and the second radiator 120 is integrated with the middle frame 310, or disposed on a surface of the middle frame 310, or disposed in a receiving space formed by the middle frame 310 and the back plate 320. When at least one of the first radiator 110 and the second radiator 120 is integrated with the middle frame 310, the first radiator 110 and the second radiator 120 may be formed by forming a break in the frame 312.

Optionally, in an embodiment, the first radiator 110 and the second radiator 120 are formed on a surface of the frame portion 312 (for example, an inner surface or an outer surface of the frame portion 312). Specifically, the basic forms of the first radiator 110 and the second radiator 120 include, but are not limited to, a patch radiator, a process of forming on the inner surface of the frame portion 312 by laser direct structuring (Laser Direct Structuring, LDS), printing direct structuring (PrintDirect Structuring, PDS), and the like, and in this embodiment, the material of the frame portion 312 may be a non-conductive material (a non-shielding material for electromagnetic wave signals or a wave-transparent structure). Of course, the first radiator 110 and the second radiator 120 may also be disposed on the surface of the back plate 320.

Optionally, the first radiator 110 and the second radiator 120 are disposed on a flexible circuit board, a hard circuit board, or other carrier board. The first radiator 110 and the second radiator 120 may be integrated on a flexible circuit board, and the flexible circuit board is adhered to the inner surface of the middle frame 310 by using an adhesive, in this embodiment, the material of the frame portion 312 may be a non-conductive material. Of course, the first radiator 110 and the second radiator 120 may also be disposed on the inner surface of the back plate 320.

It should be understood that the positions of the first radiator 110 and the second radiator 120 are only the case in some embodiments, and in other embodiments, the positions of the first radiator 110 and the second radiator 120 may be other positions, which is not limited herein.

In order to facilitate the distinction between the antenna assembly 10 and the following antenna assemblies 10, the antenna assemblies 10 described in the foregoing embodiments are named first antenna assemblies.

Referring to fig. 43, fig. 43 is a schematic diagram of an electronic device and a terminal device according to an embodiment of the present application. The first antenna assembly 10 is configured to receive a ranging signal transmitted by the terminal device 5, where the ranging signal is a UWB band signal. The electronic device 1 further comprises a processor 40. The processor 40 is electrically connected to the first antenna assembly 10, and when the first antenna assembly 10 receives the ranging signal, the processor 40 controls the first antenna assembly 10 to transmit a feedback signal to the terminal device 5 according to the ranging signal, where the feedback signal is a UWB band signal and is used to characterize the distance between the electronic device 1 and the terminal device 5.

Since the related art UWB antenna is separately provided on the motherboard bracket, the main lobe of the directional pattern of the UWB antenna is in the-Z direction in the figure, and the directional coefficient in the Z direction is very low. That is, the radiation direction of the related art is a direction directed outward from the rear camera. In other words, the pattern of the UWB antenna in the related art is directional. In some limit cases, for example, the electronic device 1 of the UWB antenna of the related art is placed in a pocket of trousers, and because of the orientation of the pattern of the UWB antenna, when the terminal device 5 transmits a ranging signal (which is a UWB band) to the electronic device 1, the UWB antenna of the electronic device 1 may be completely blocked from receiving the ranging signal. Therefore, the terminal device 5 cannot search for the electronic device 1.

The antenna assembly 10 according to the embodiment of the present application may share one antenna assembly 10 with other frequency bands, and the position setting of the antenna assembly 10 may be more flexible, for example, the antenna assembly may be integrated in the housing 30 of the electronic device 1, disposed on the surface of the housing 30, or disposed in an accommodating space surrounded by the housing 30. When the antenna assembly 10 provided in the embodiments of the present application is more flexible in design, the antenna assembly 10 provided in the embodiments of the present application has a greater application potential than the UWB antenna of the related art. The housing 30 includes a back plate 320 and a middle frame 310. When the antenna assembly 10 provided in the embodiment of the present application is disposed on the middle frame 310 (i.e., used as a middle frame antenna), the omni-directional performance is better. The antenna assembly 10 has a more omni-directional pattern in the UWB band than the related art UWB antenna, i.e., not only includes the-Z direction, but also includes the radiation field in the Z direction, and the Z direction still has the capability of being detected in the limited scenario. When a terminal device 5 sends a ranging signal to the electronic device 1, the antenna assembly 10 of the electronic device 1 may receive the ranging signal, and thus, the processor 40 of the electronic device 1 controls the first antenna assembly 10 to transmit a feedback signal to the terminal device 5 according to the ranging signal, and the terminal device 5 may calculate a distance between the electronic device 1 and the terminal device 5 according to the feedback signal.

Referring to fig. 1, 44, and 45, fig. 44 is an exploded perspective view of an electronic device according to another embodiment; FIG. 45 is a schematic view of the electronic device of FIG. 44 from another perspective after assembly. The electronic device 1 further includes a motherboard 50, a motherboard bracket 60, and a second antenna assembly 20. The main board 50 has a ground pole, and the first antenna assembly 10 is electrically connected to the main board 50 to be grounded. The motherboard bracket 60 is used for supporting the motherboard 50. The second antenna assembly 20 is carried by the motherboard bracket 60. The second antenna assembly 20 may be directly supported by the motherboard bracket 60, or the second antenna assembly 20 may be indirectly supported by the motherboard bracket 60, for example, the second antenna assembly 20 is disposed on the motherboard 50, and the motherboard 50 is disposed on the motherboard bracket 60. The second antenna assembly 20 is used for camera detection and/or identity authentication.

In the related art, a UWB antenna is provided on the main board holder 60. The UWB band of the antenna assembly 10 provided in this embodiment may share one antenna assembly 10 with other bands, and the position setting of the antenna assembly 10 may be more flexible, for example, the antenna assembly may be integrated in the housing 30 of the electronic device 1, disposed on the surface of the housing 30, or disposed in an accommodating space surrounded by the housing 30. Thus, space on the motherboard bracket 60 is saved, providing more design possibilities, e.g., the second antenna assembly 20 may be provided to enable more functionality of the electronic device 1.

In an embodiment, the second antenna assembly 20 is used for camera detection, for example, the second antenna assembly 20 may be used for camera detection in an environment where the electronic device 1 is located. For example, when a user is in a hotel, the second antenna assembly 20 may be utilized to detect whether a camera is hidden in the hotel. The second Antenna assembly 20 may be a Planar Inverted F Antenna (PIFA) Antenna assembly 10.

In another embodiment, the second antenna assembly 20 is used for identity authentication, for example, the second antenna assembly 20 is used for sending an authentication signal to the access control module to request the access control module to open a target device (such as a district gate), etc. The second antenna assembly 20 may be an FPC antenna.

Further, referring to fig. 45, the electronic device 1 further includes a functional device 70. The functional device 70 is electrically connected to the motherboard 50, a housing area is defined between the functional device 70 and the first antenna assembly 10, and the second antenna assembly 20 is disposed in the housing area.

In this embodiment, the functional device 70 may be, but is not limited to, a rear camera, a flash, or the like. The second antenna assembly 20 is disposed in the accommodating area, so that the space between the functional device 70 and the first antenna assembly 10 can be fully utilized, which is beneficial to the integration of the electronic device 1.

Referring to fig. 42, the housing 30 includes a first frame 30a and a second frame 30b connected by bending. The second frame 30b has a length greater than that of the first frame 30 a. The first radiator 110 of the antenna assembly 10 is disposed corresponding to the first frame 30a, the second radiator 120 of the antenna assembly 10 is disposed corresponding to the first frame 30a, the other portion of the second radiator 120 is disposed corresponding to the second frame 30b, the coupling slot 110a is located at the first frame 30a, and the coupling slot 110a is adjacent to a corner where the first frame 30a is connected with the second frame 30b.

In this embodiment, the first frame 30a is a long frame of the housing 30 of the electronic device 1, and the second frame 30b is a short frame of the housing 30 of the electronic device 1. The coupling gap 110a is located at the corner where the first frame 30a and the second frame 30b are connected, and the coupling gap 110a is adjacent to the corner where the first frame 30a and the second frame 30b are connected, so that when the electronic device 1 is in the landscape mode, the coupling gap 110a is not easy to be held by a user and is blocked, thereby improving the communication performance of the electronic device 1 in the landscape mode.

When the user holds the electronic device 1 across the screen (e.g., plays a game across the screen, looks at a video, etc.), the holding position of the user's hands is relatively adjacent to the middle position of the first bezel 30a, so that the coupling slit 110a is far from the holding position of the user. The closer the user's finger is to the electric field strong point of the antenna assembly 10 (at the coupling slot 110 a), the greater the interference impact on the antenna assembly 10. Therefore, the portions of the first radiator 110 and the second radiator 120 of the antenna assembly 10 are disposed on the first frame 30a, and the coupling slot 110a is disposed adjacent to the corner, so that the coupling slot 110a is far away from the hand-held position of the user holding the electronic device 1 on the horizontal screen, and the coupling slot 110a is kept away from the finger of the user when the electronic device 1 is on the horizontal screen and holds the electronic device 1, so that the finger is not blocked. Optionally, the distance between the position of the coupling slot 110a and the first frame 30a is more than 40mm, so that the antenna assembly 10 has higher radiation efficiency, and further the use experience of the user on the electronic device 1 is improved.

In addition, the second radiator 120 is partially disposed corresponding to the first frame 30a, and the other portion of the second radiator 120 is disposed corresponding to the second frame 30b, that is, the second radiator 120 is disposed corresponding to a corner where the first frame 30a is connected to the second frame 30 b. The corners have a relatively good headroom and are more easily excited to a higher reference ground current to improve the radiation efficiency of the frequency band supported by the antenna assembly 10.

Of course, in other embodiments, the first radiator 110 and the second radiator 120 of the antenna assembly 10 may be disposed at any other positions of the electronic device 1.

In summary, the antenna assembly 10 provided in an embodiment of the present application can realize a design of two antennas with common aperture, and can reduce the stacking space of the antenna assembly 10 while increasing the bandwidth and the number of the transmit/receive frequency bands. In addition, through the arrangement of the first feed source S1, the second feed source S2 and the third feed source S3 in the antenna assembly 10, the arrangement of the first matching circuit M1, the second matching circuit M2, the third matching circuit M3 and the fourth matching circuit M4, and the selection of the frequency selection filtering sub-circuits in the first matching circuit M1, the second matching circuit M2, the third matching circuit M3 and the fourth matching circuit M4, coverage of the LB frequency band+gps frequency band+wifi 7 frequency band+lte frequency band+nr frequency band+uwb frequency band can be realized, and the coverage of a plurality of frequency bands and the width of the frequency bands can be realized. In addition, by reasonably arranging the antenna assembly 10 on the electronic device 1, the electronic device 1 still has higher signal receiving and transmitting efficiency in a horizontal screen state. In addition, when the antenna assembly 10 provided in the embodiment of the present application is applied to the electronic device 1, the conductive middle frame 310 may be used as the first antenna radiator, so that the antenna assembly 10 has better omnidirectionality when working in the UWB frequency band. In addition, at least one of the first radiator 110 and the second radiator 120 of the antenna assembly 10 is integrated with the housing 30, or is disposed on a surface of the housing 30, or is disposed in an accommodating space surrounded by the housing 30. Therefore, the layout area of the UWB antenna in the related art can be avoided to save the housing area for layout of the second antenna assembly 20.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those of ordinary skill in the art that numerous modifications and variations can be made without departing from the principles of the present application, and such modifications and variations are also considered to be within the scope of the present application.

Claims

1. An antenna assembly, the antenna assembly comprising:

a first feed;

a first matching circuit;

a second matching circuit;

2. The antenna assembly of claim 1, wherein the plurality of resonant modes comprises:

the first resonance mode is used for supporting the UWB frequency band, and is a 5/4 wavelength mode from the second grounding end to the coupling gap.

3. The antenna assembly of claim 2, wherein the first ground is electrically connected to a first ground point, the plurality of resonant modes further comprising:

a second resonant mode, the second resonant mode being a 3/4 wavelength mode of the coupling slot to the second ground;

a third resonant mode, the third resonant mode being a ring mode of the first feed to the first ground point; and

A fourth resonant mode, which is a 1/4 wavelength mode from the first feed source to the coupling gap;

the second resonance mode, the third resonance mode and the fourth resonance mode are used for supporting a WiFi 7 frequency band.

4. The antenna assembly of claim 3, wherein the antenna assembly further comprises a ground system having a second ground point, the second ground point being electrically connected to the second ground point, the plurality of resonant modes further comprising:

A fifth resonant mode, the fifth resonant mode being a 3/4 wavelength mode in which the coupling slot is electrically connected to a second ground point to the second ground point; and

A sixth resonant mode that is a 1/4 wavelength mode of the second matching circuit to the coupling slot;

the fifth resonance mode is used for supporting an LTE frequency band and an NR frequency band, and the sixth resonance mode is used for supporting the LTE frequency band and the NR frequency band.

5. The antenna assembly of claim 1, wherein the second matching circuit is electrically connected to ground, the first radiator further has a second connection point, the second connection point is located between the first ground terminal and the first coupling terminal, and the second connection point is spaced apart from the feed point, the antenna assembly further comprising:

and a third matching circuit electrically connected to the second connection point, and electrically connected to ground.

6. The antenna assembly of claim 5 wherein the second connection point is facing away from the coupling slot as compared to the feed point.

7. The antenna assembly of claim 6, wherein the plurality of resonant modes further comprises:

A seventh resonance mode, which is a ring mode from the third matching circuit to the second matching circuit; and

An eighth resonance mode, which is a ring mode from the third matching circuit to the first matching circuit;

the seventh resonance mode is used for supporting an LTE frequency band and an NR frequency band, and the eighth resonance mode is used for supporting the LTE frequency band and the NR frequency band.

8. The antenna assembly of claim 6, wherein the antenna assembly further comprises:

and the second grounding end is electrically connected with the fourth matching circuit to the ground.

9. The antenna assembly of claim 1, wherein the second matching circuit is electrically connected to ground, the first radiator further has a second connection point, the second connection point is located between the first ground terminal and the first coupling terminal, and the second connection point is spaced apart from the feed point, the antenna assembly further comprising:

a third matching circuit;

and the second feed source is electrically connected with the third matching circuit to the second connection point, and the first radiator supports an LB frequency band and a GPS L5 frequency band under the excitation of the second feed source.

10. The antenna assembly of claim 9, wherein the first ground is electrically connected to a first ground point, the first radiator producing a ninth resonant mode upon excitation by the second feed, the ninth resonant mode for supporting the LB frequency band.

11. The antenna assembly of claim 10 wherein the ninth resonant mode is a 1/4 wavelength mode of the first ground point to the coupling slot.

12. The antenna assembly of claim 10, wherein the length of the first radiator is 1/8 wavelength to 1/4 wavelength of the LB frequency band.

13. The antenna assembly of claim 1, wherein the antenna assembly further comprises:

a third matching circuit electrically connected to the second connection point, and the third matching circuit is electrically connected to ground;

the third feed source is electrically connected to the second matching circuit, and the first radiator and the second radiator support a GPS L1 frequency band and a WiFi2.4G frequency band under the excitation of the third feed source.

14. The antenna assembly of claim 13, wherein the length of the second radiator is 1/4 wavelength corresponding to a resonance frequency point of the GPS L1 band.

15. The antenna assembly of claim 1, wherein the antenna assembly further comprises:

a third matching circuit;

the second feed source is electrically connected to the third matching circuit to a second connection point, and the first radiator supports an LB frequency band under the excitation of the second feed source;

the second grounding end is electrically connected with the fourth matching circuit to the ground; and

16. The antenna assembly of claim 13 or 15, wherein the first radiator and the second radiator support a tenth resonant mode, an eleventh resonant mode, and a twelfth resonant mode upon excitation by the third feed, the tenth resonant mode being for supporting the GPS L1 band, the eleventh resonant mode and the twelfth resonant mode being for supporting a WiFi2.4G band.

17. The antenna assembly of claim 16 wherein the tenth resonant mode is a 1/4 wavelength mode from a point at which a fourth matching circuit is electrically connected to the second ground to the coupling slot;

The eleventh resonant mode is a 1/4 wavelength mode of the first connection point to the coupling slot;

the twelfth resonant mode is a homodromous current mode from the third feed source to the first grounding end.

18. The antenna assembly of claim 1, wherein the first matching circuit or the second matching circuit comprises one or more sub-frequency selective filter circuits comprising one or more of:

the sub-frequency-selecting filter circuit comprises a band-pass circuit formed by serially connecting an inductor and a capacitor;

the sub-frequency-selecting filter circuit comprises a band-stop circuit formed by connecting an inductor and a capacitor in parallel;

the sub-frequency-selecting filter circuit comprises an inductor, a first capacitor and a second capacitor, wherein the inductor is connected with the first capacitor in parallel, and the second capacitor is electrically connected with a node, which is electrically connected with the first capacitor, of the inductor;

the sub-frequency-selecting filter circuit comprises a capacitor, a first inductor and a second inductor, wherein the capacitor is connected with the first inductor in parallel, and the second inductor is electrically connected with a node which is electrically connected with the capacitor and the first inductor;

the sub-frequency-selecting filter circuit comprises an inductor, a first capacitor and a second capacitor, wherein the inductor is connected in series with the first capacitor, one end of the second capacitor is electrically connected with the first end of the inductor, which is not connected with the first capacitor, and the other end of the second capacitor is electrically connected with the end of the first capacitor, which is not connected with the inductor;

The sub-frequency-selecting filter circuit comprises a capacitor, a first inductor and a second inductor, wherein the capacitor is connected in series with the first inductor, one end of the second inductor is electrically connected with one end of the capacitor, which is not connected with the first inductor, and the other end of the second inductor is electrically connected with one end of the first inductor, which is not connected with the capacitor;

the sub-frequency-selecting filter circuit comprises a first capacitor, a second capacitor, a first inductor and a second inductor, wherein the first capacitor is connected with the first inductor in parallel to form a first unit, the second capacitor is connected with the second inductor in parallel to form a second unit, and the first unit and the second unit are connected in series;

the sub-frequency-selecting filter circuit comprises a first capacitor, a second capacitor, a first inductor and a second inductor, wherein the first capacitor and the first inductor are connected in series to form a first unit, the second capacitor and the second inductor are connected in series to form a second unit, and the first unit and the second unit are connected in parallel.

19. The antenna assembly of claim 2, wherein the first resonant mode is for supporting a CH9 band in the UWB band, the antenna assembly further being for supporting a CH5 band in the UWB band.

20. An electronic device, wherein the electronic device comprises a housing and a first antenna assembly, the first antenna assembly is an antenna assembly according to any one of claims 1-19, and at least one of a first radiator and a second radiator of the antenna assembly is integrated in the housing, or is disposed on a surface of the housing, or is disposed in an accommodating space surrounded by the housing.

21. The electronic device of claim 20, wherein the first antenna assembly is configured to receive a ranging signal transmitted by a terminal device, wherein the ranging signal is a UWB band signal, the electronic device further comprising:

and the processor is electrically connected with the first antenna assembly, and when the first antenna assembly receives the ranging signal, the processor controls the first antenna assembly to transmit a feedback signal to the terminal equipment according to the ranging signal, wherein the feedback signal is a UWB frequency band signal and is used for representing the distance between the electronic equipment and the terminal equipment.

22. The electronic device of claim 20, wherein the electronic device further comprises:

A main board having a ground pole, the first antenna assembly being electrically connected to the main board to be grounded;

the main board support is used for supporting the main board;

the second antenna assembly is borne on the main board support and is used for detecting a camera and/or authenticating identity.

23. The electronic device of claim 22, wherein the electronic device further comprises:

and the functional device is electrically connected to the main board, a containing area is defined between the functional device and the first antenna assembly, and the second antenna assembly is arranged in the containing area.

24. The electronic device of claim 21, wherein the housing comprises a first frame and a second frame that are connected in a bent manner, wherein the second frame has a length that is greater than a length of the first frame, wherein a first radiator of the antenna assembly is disposed corresponding to the first frame, wherein a second radiator portion of the antenna assembly is disposed corresponding to the first frame, wherein a further portion of the second radiator is disposed corresponding to the second frame, wherein the coupling slot is located at the first frame and wherein the coupling slot is adjacent a corner of the first frame that is connected to the second frame.