CN118040315A

CN118040315A - Antenna device and electronic equipment

Info

Publication number: CN118040315A
Application number: CN202211420691.1A
Authority: CN
Inventors: 蔡智宇; 李建铭
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2024-05-14

Abstract

The embodiment of the application provides an antenna device and electronic equipment, the antenna device comprises: the first radiator, the second radiator and the first decoupling structure are provided with a first coupling gap; at least part of the orthographic projection of the first decoupling structure towards the first substrate is positioned in the first coupling gap, and a second coupling gap and a third coupling gap are respectively formed between the first decoupling structure and the first radiator and between the first decoupling structure and the second radiator. In this way, the antenna device can be prevented from occupying an excessive design area in the electronic device, and thus the influence on the impedance matching and radiation characteristics of other antennas can be avoided.

Description

Antenna device and electronic equipment

Technical Field

The embodiment of the application relates to the technical field of terminals, in particular to an antenna device and electronic equipment.

Background

With the continuous development of communication technology, multiple-Input Multiple-Output (MIMO) antenna technology is increasingly widely applied to electronic devices, and thus, the number of antennas is increased Multiple times, and the coverage frequency band is also increased. Currently, electronic equipment products, particularly electronic equipment of metal Industry Design (ID), still require high compactness and metal duty cycle, and recent electronic equipment design trends are higher screen duty cycle, more multimedia devices and larger battery capacity, and these designs lead to rapid compression of antenna space, which poses serious challenges for antenna design of metal body terminals.

Taking an electronic device as an example of a mobile phone, different antenna structures are generally designed at different spatial positions on the mobile phone, specifically, different resonant antennas can be laid out at different positions in the mobile phone space according to actual scene requirements, so as to meet antenna requirements in different scenes. In order to solve the problem of isolation, in the related art, a patch dual antenna is generally used as an example, a slot resonance structure (Slot resonant structure) is implanted on a ground plane (ground plane), and the slot resonance structure is a decoupling component of the dual antenna itself, and by properly adjusting the length and width of the slot resonance structure, the isolation of the dual antenna in the operating frequency band can be effectively improved.

However, in the above design solution, the slot resonance structure occupies an excessive design area on the electronic device, which easily affects the impedance matching and radiation characteristics of other antennas.

Disclosure of Invention

The embodiment of the application provides an antenna device and electronic equipment, which can reduce the occupied space of the antenna device in the electronic equipment, and further can avoid influencing the impedance matching and radiation characteristics of other antennas and avoiding interfering or influencing the layout of other devices in the electronic equipment.

In a first aspect, an embodiment of the present application provides an antenna apparatus, including at least: a first radiator and a second radiator provided on the first substrate with a first coupling gap therebetween; further comprises: a first decoupling structure; at least part of the orthographic projection of the first decoupling structure towards the first substrate is positioned in the first coupling gap, and a second coupling gap and a third coupling gap are respectively formed between the first decoupling structure and the first radiator and between the first decoupling structure and the second radiator;

the first radiator is coupled to the second radiator through the first coupling gap to form a first coupling current, and the second radiator is coupled to the first radiator through the first coupling gap to form a second coupling current;

The first decoupling structure is used for coupling a third coupling current from the first radiator through the second coupling gap and coupling the third coupling current to the second radiator through the third coupling gap so that the third coupling current coupled to the second radiator at least partially counteracts the first coupling current; and the third coupling gap is further used for coupling a fourth coupling current from the second radiator through the third coupling gap, and coupling the fourth coupling current to the first radiator through the second coupling gap so that the fourth coupling current coupled to the first radiator and the second coupling current at least partially cancel.

In the antenna device provided by the embodiment of the application, a first coupling gap is formed between the first radiator and the second radiator, and the first decoupling structure is designed to be at least partially positioned in the first coupling gap towards the orthographic projection of the first substrate by arranging the first decoupling structure, namely, the first decoupling structure is arranged in the first radiator and the second radiator, and a second coupling gap is formed between the first decoupling structure and the first radiator, and a third coupling gap is formed between the first decoupling structure and the second radiator.

The first radiator is coupled to the second radiator through the first coupling gap to form a first coupling current, the first decoupling structure is coupled from the first radiator through the second coupling gap to form a third coupling current, and the third coupling current is coupled to the second radiator through the third coupling gap, so that the third coupling current coupled to the second radiator and the first coupling current at least partially cancel each other. The second radiator is coupled to the first radiator through the first coupling gap to form a second coupling current, the first decoupling structure is coupled from the second radiator through the third coupling gap to form a fourth coupling current, and the fourth coupling current is coupled to the first radiator through the second coupling gap, so that the fourth coupling current coupled to the first radiator and the second coupling current at least partially cancel each other. In this way, the third coupling current formed by the first decoupling structure can be mutually offset with the first coupling current formed by coupling the first radiator to the second radiator, and the fourth coupling current formed by the first decoupling structure can be mutually offset with the second coupling current formed by coupling the second radiator to the first radiator.

In one possible implementation, a side outer edge of the first radiator facing the first coupling gap has a first notch area, and the first notch area is communicated with the first coupling gap; the portion of the first decoupling structure, which faces the orthographic projection of the substrate, is located in the first notch area.

Through be provided with first breach region on the one side outward flange towards first coupling clearance on first radiator, the part of the orthographic projection of first decoupling structure towards the base plate is located first breach region, and first breach region can provide bigger space for first decoupling structure to dodge to first decoupling structure certainly.

In one possible implementation manner, a second notch area is arranged on the outer edge of one side, facing the first coupling gap, of the second radiator, and the second notch area is communicated with the first coupling gap; the portion of the first decoupling structure, which faces the orthographic projection of the substrate, is located in the second notch area.

Through be provided with the second breach region on the one side outward flange towards first coupling clearance on the second radiator, the part of the orthographic projection of first decoupling structure towards the base plate is located the second breach region, and the second breach region can provide bigger space for first decoupling structure to dodge to the first decoupling structure certainly.

In one possible implementation, the first decoupling structure is located on the same plane as the first and second radiators; forming a second coupling gap between a part of the first decoupling structure located in the first notch area and the inner edge of the first notch area; the third coupling gap is formed between the part of the first decoupling structure located in the second notch area and the inner edge of the second notch area.

Through designing the first decoupling structure to be located the coplanar with first radiator and second radiator, be provided with first breach region on the one side outward flange of first coupling clearance on the first radiator, when being provided with the second breach region on the one side outward flange of second radiator towards first coupling clearance, the part of first decoupling structure is located first breach region, then forms the second coupling clearance between the interior edge of first decoupling structure and first breach region, and the part of first decoupling structure is located second breach region, then forms the third coupling clearance between the interior edge of second decoupling structure and second breach region. In this way, the first decoupling structure couples the third coupling current from the first radiator through the second coupling gap and couples the third coupling current to the second radiator through the third coupling gap such that the third coupling current coupled to the second radiator and the first coupling current at least partially cancel each other. And the first decoupling structure is coupled to form a fourth coupling current from the second radiator through the third coupling gap, and the fourth coupling current is coupled to the first radiator through the second coupling gap, so that the fourth coupling current coupled to the first radiator and the second coupling current at least partially cancel each other.

In one possible implementation, the first decoupling structure is stacked and spaced apart from the first and second radiators in a thickness direction of the first substrate; the second coupling gap is formed between the first decoupling structure and the first radiator in the thickness direction of the first substrate, and the third coupling gap is formed between the first decoupling structure and the second radiator in the thickness direction of the first substrate.

The first decoupling structure is designed to be laminated with the first radiator and the second radiator in the thickness direction of the first substrate and arranged at intervals, a second coupling gap is formed between the first decoupling structure and the first radiator in the thickness direction of the first substrate, and a third coupling gap is formed between the first decoupling structure and the second radiator in the thickness direction of the first substrate, so that the first decoupling structure couples the first radiator through the second coupling gap to form a third coupling current, and the third coupling current couples the second radiator through the third coupling gap to enable the third coupling current coupled to the second radiator to at least partially cancel each other. And the first decoupling structure is coupled to form a fourth coupling current from the second radiator through the third coupling gap, and the fourth coupling current is coupled to the first radiator through the second coupling gap, so that the fourth coupling current coupled to the first radiator and the second coupling current at least partially cancel each other.

In one possible implementation, the method further includes: a second substrate and the first substrate; the second substrate is stacked with the first substrate, and the first radiator and the second radiator are positioned between the first substrate and the second substrate; and the first decoupling structure is positioned on one surface of the second substrate away from the first radiator and the second radiator.

Through set up the second base plate on the one side that first radiator and second radiator deviate from first base plate, set up first decoupling structure on the one side that the second base plate deviates from first radiator and second radiator, can ensure that first decoupling structure and first radiator and second radiator range upon range of and the interval setting in the thickness direction of first base plate.

The first decoupling structure, the first radiator and the second radiator are configured on different layer planes or the same layer plane, so that the overall design freedom degree of the multi-antenna can be increased.

In one possible implementation, the method further includes: a first ground wall; the first grounding wall is located in the first substrate, one end of the first grounding wall is connected with one of the first radiator and the second radiator, and the other end of the first grounding wall is used for grounding.

In one possible implementation, the method further includes: a second ground wall; the second grounding wall is located in the first substrate, one end of the second grounding wall is connected with the other one of the first radiator and the second radiator, and the other end of the second grounding wall is used for grounding.

By providing the first and second ground walls in the first substrate, the first and second radiators can be grounded.

In one possible implementation, the method further includes: at least one grounding point arranged on the grounding plate; the other end of the first grounding wall and the other end of the second grounding wall are connected with the grounding point.

In one possible implementation manner, a first opening is formed in the first radiator, the first grounding wall is located in the first opening, and a first capacitor is connected between the first grounding wall and the inner wall of the first opening; a second opening is formed in the second radiator, the second grounding wall is positioned in the second opening, and a second capacitor is connected between the second grounding wall and the inner wall of the second opening; wherein the extending direction of the first opening and the extending direction of the second opening are the same as the extending direction of the first coupling gap.

In one possible implementation, the first decoupling structure includes at least: a first lateral decoupling stub; the extending direction of the first transverse decoupling branch is perpendicular to the extending direction of the first coupling gap.

In one possible implementation, the first decoupling structure further includes: and one end of the first longitudinal decoupling branch is used for grounding.

By changing the shape of the first decoupling structure, the design elasticity of the first decoupling structure in two-dimensional space can be increased, and the efficiency of multiple antennas in frequency bands can be improved.

In one possible implementation, the first longitudinal decoupling branch is connected to a middle connection region of the first transverse decoupling branch.

In one possible implementation, the middle connection region includes a midpoint of the first lateral decoupling branch.

In one possible implementation, the middle connection region further includes: a first connection region and a second connection region;

The first connection region is located within a range that a midpoint of the first lateral decoupling stub extends 1mm toward a first end of the first lateral decoupling stub; the second connection region is located within a range extending 1mm from a midpoint of the first lateral decoupling stub toward a second end of the first lateral decoupling stub.

In one possible implementation, the method further includes: a first feeding point and a second feeding point; the first feed point is positioned at one side of the first radiator, which is away from the first coupling gap, and the second feed point is positioned at one side of the second radiator, which is away from the first coupling gap; the first feeding point feeds the first radiator, and the second feeding point feeds the second radiator.

In one possible implementation, the first and second feeding points are symmetrically arranged along the extension direction of the first coupling gap.

In one possible implementation, the first and second feed points are offset relative to one another along the direction of extension of the first coupling gap.

The first feeding point and the second feeding point are configured on a symmetrical plane or an asymmetrical plane, and the antenna device can improve the isolation degree in a frequency band by embedding the first decoupling structure, so that the overall design freedom of the multiple antennas is increased.

In one possible implementation manner, a first matching circuit is arranged on one surface of the first radiator facing the first substrate, and the first matching circuit is electrically connected with the first radiator; a second matching circuit is arranged on one surface of the second radiator facing the first substrate, and the second matching circuit is electrically connected with the second radiator; the first matching circuit and the second matching circuit are grounded.

The first matching circuit is grounded on one surface of the first radiator facing the first substrate, the first matching circuit is electrically connected with the first radiator, the second matching circuit is grounded on one surface of the second radiator facing the first substrate, and the second matching circuit is electrically connected with the second radiator, so that single-mode double resonance of the antenna device can be realized.

In one possible implementation, the first matching circuit includes any one or more of a capacitance, an inductance, and a resistance; the second matching circuit includes any one or more of a capacitance, an inductance, and a resistance.

In one possible implementation, the projected areas of the first and second radiators on the first substrate are (0.28λ 0.37λ) mm; wherein lambda is the wavelength corresponding to the center frequency point of the resonant frequency.

In one possible implementation, the projected areas of the first and second radiators on the first substrate are (0.28λ 0.67λ) mm; wherein lambda is the wavelength corresponding to the center frequency point of the resonant frequency.

By increasing the projected areas of the first radiator and the second radiator on the first substrate, two antenna modes (a common mode antenna mode and a differential mode antenna mode) can be excited simultaneously to realize a dual resonance mode of the antenna device.

In one possible implementation, the method further includes: a third radiator and a second decoupling structure; the third radiator is arranged on the first substrate, the second radiator is positioned between the first radiator and the third radiator, and a fourth coupling gap is formed between the second radiator and the third radiator; at least part of the orthographic projection of the second decoupling structure towards the first substrate is positioned in the fourth coupling gap, and a fifth coupling gap and a sixth coupling gap are respectively formed between the second decoupling structure and the second radiator and between the second decoupling structure and the third radiator;

The second radiator is coupled to the third radiator through the fourth coupling gap to form a fifth coupling current, and the third radiator is coupled to the second radiator through the fourth coupling gap to form a sixth coupling current; the second decoupling structure is used for coupling a seventh coupling current from the second radiator through the fifth coupling gap and coupling the seventh coupling current to the third radiator through a sixth coupling gap so that the seventh coupling current coupled to the third radiator and the fifth coupling current at least partially cancel; and the device is further used for forming an eighth coupling current through the sixth coupling gap from the third radiator, and coupling the eighth coupling current to the second radiator through the fifth coupling gap so that the eighth coupling current coupled to the second radiator and the sixth coupling current at least partially cancel.

The second decoupling structure is designed to be at least partially positioned in the fourth coupling gap towards the orthographic projection of the first substrate by arranging the second decoupling structure, namely the second decoupling structure is arranged in the second radiator and the third radiator, a fifth coupling gap is formed between the second decoupling structure and the second radiator, and a sixth coupling gap is formed between the second decoupling structure and the third radiator.

The second radiator is coupled to the third radiator through the fourth coupling gap to form a fifth coupling current, the second decoupling structure is coupled from the second radiator through the fifth coupling gap to form a seventh coupling current, and the seventh coupling current is coupled to the third radiator through the sixth coupling gap, so that the seventh coupling current and the fifth coupling current coupled to the third radiator at least partially cancel each other. The third radiator is coupled to the second radiator through the fourth coupling gap to form a sixth coupling current, the second decoupling structure is coupled from the third radiator through the sixth coupling gap to form an eighth coupling current, and the eighth coupling current is coupled to the second radiator through the fifth coupling gap, so that the eighth coupling current coupled to the second radiator and the sixth coupling current at least partially cancel each other. In this way, the seventh coupling current formed by the second decoupling structure can be mutually offset with the fifth coupling current formed by coupling the second radiator to the third radiator, and the eighth coupling current formed by the second decoupling structure can be mutually offset with the sixth coupling current formed by coupling the third radiator to the second radiator.

In one possible implementation, the method further includes: a third decoupling structure and a fourth radiator; the fourth radiator is arranged on the first substrate, the third radiator is positioned between the second radiator and the fourth radiator, and a seventh coupling gap is formed between the fourth radiator and the third radiator; at least part of the orthographic projection of the third decoupling structure towards the first substrate is positioned in the seventh coupling gap, and an eighth coupling gap and a ninth coupling gap are respectively formed between the third decoupling structure and the third radiator and between the third decoupling structure and the fourth radiator;

the third radiator is coupled to the third radiator through the seventh coupling gap to form a ninth coupling current, and the fourth radiator is coupled to the third radiator through the seventh coupling gap to form a tenth coupling current;

The third decoupling structure is configured to couple an eleventh coupling current from the third radiator through the eighth coupling gap and couple the eleventh coupling current to the fourth radiator through a ninth coupling gap such that the eleventh coupling current coupled to the fourth radiator at least partially cancels the ninth coupling current; and the third radiator is further used for forming a twelfth coupling current through the ninth coupling gap from the fourth radiator, and coupling the twelfth coupling current to the third radiator through the eighth coupling gap so that the twelfth coupling current coupled to the third radiator and the tenth coupling current at least partially cancel.

The third decoupling structure is designed to be at least partially positioned in the seventh coupling gap towards the orthographic projection of the first substrate by arranging the third decoupling structure, namely the third decoupling structure is arranged in the third radiator and the fourth radiator, an eighth coupling gap is formed between the third decoupling structure and the third radiator, and a ninth coupling gap is formed between the third decoupling structure and the fourth radiator.

The third radiator is coupled to the fourth radiator through the seventh coupling gap to form a ninth coupling current, the third decoupling structure is coupled to the fourth radiator through the eighth coupling gap to form an eleventh coupling current, and the eleventh coupling current is coupled to the fourth radiator through the ninth coupling gap so that the eleventh coupling current and the ninth coupling current coupled to the fourth radiator at least partially cancel each other. The fourth radiator is coupled to the third radiator through a seventh coupling gap to form a tenth coupling current, the third decoupling structure is coupled from the third radiator through a ninth coupling gap to form a twelfth coupling current, and the twelfth coupling current is coupled to the third radiator through an eighth coupling gap, so that the twelfth coupling current coupled to the third radiator and the tenth coupling current at least partially cancel each other. In this way, the eleventh coupling current formed by the third decoupling structure can be mutually offset with the ninth coupling current formed by the third radiator coupling to the fourth radiator, and the twelfth coupling current formed by the third decoupling structure can be mutually offset with the tenth coupling current formed by the fourth radiator coupling to the third radiator.

In a second aspect, an embodiment of the present application provides an electronic device, including at least: display screen, center, battery lid and be located the center with battery between the battery lid still includes: an antenna device as described in any one of the above; the first radiator and the second radiator in the antenna device are disposed on one face of the middle frame.

The electronic device at least comprises an antenna device, wherein a first coupling gap is formed between a first radiator and a second radiator, a first decoupling structure is arranged, the first decoupling structure is designed to be at least partially positioned in the first coupling gap towards the orthographic projection of a first substrate, namely the first decoupling structure is arranged in the first radiator and the second radiator, a second coupling gap is formed between the first decoupling structure and the first radiator, and a third coupling gap is formed between the first decoupling structure and the second radiator.

These and other aspects, implementations, and advantages of the exemplary embodiments will become apparent from the following description of the embodiments, taken in conjunction with the accompanying drawings. It is to be understood that the specification and drawings are solely for purposes of illustration and not as a definition of the limits of the embodiments of the application, for which reference should be made to the appended claims. Additional aspects and advantages of embodiments of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the application. Furthermore, the aspects and advantages of the embodiments of the application may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

Drawings

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

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 4 is a schematic top view of an antenna device according to an embodiment of the application;

fig. 5 is a schematic cross-sectional view of an antenna device according to an embodiment of the present application;

fig. 6 is a schematic top view of an antenna device according to an embodiment of the application;

fig. 7 is a schematic cross-sectional view of an antenna device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a split structure of an antenna device in the prior art;

fig. 9 is a schematic top view of a prior art antenna device;

fig. 10 is a schematic cross-sectional view of a prior art antenna device;

fig. 11 is a schematic structural diagram of an antenna device according to an embodiment of the present application;

Fig. 12 is a schematic structural diagram of a first decoupling structure in an antenna apparatus according to an embodiment of the present application;

Fig. 13 is a schematic structural diagram of an antenna device according to an embodiment of the present application;

FIG. 14 is a schematic view of a portion of the structure of FIG. 13;

fig. 15 is an S-parameter diagram of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 16 is an antenna efficiency diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 17 is an ECC representation diagram of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 18 is a schematic diagram showing a change of isolation degree of whether a first decoupling structure is added in an antenna device according to an embodiment of the present application;

fig. 19 is a schematic diagram of current distribution on a first radiator and a second radiator without adding a first decoupling structure in an antenna device according to an embodiment of the present application;

fig. 20 is a schematic diagram of current distribution on a ground plate without adding a first decoupling structure in an antenna device according to an embodiment of the present application;

Fig. 21 is a schematic diagram of current distribution on a first radiator and a second radiator after a first decoupling structure is added in an antenna device according to an embodiment of the present application;

fig. 22 is a schematic diagram of current distribution on a ground plate after adding a first decoupling structure to an antenna device according to an embodiment of the present application;

Fig. 23 is a schematic diagram showing current distribution on the first radiator and the second radiator when the first radiator is excited and the second radiator is connected to the 50 ohm connection line after the first decoupling structure is added in the antenna device according to the embodiment of the present application;

Fig. 24 is a schematic diagram showing a current distribution on a ground plane when a first radiator is excited and a second radiator is connected to a 50 ohm connection line after a first decoupling structure is added in an antenna device according to an embodiment of the present application;

Fig. 25 is a schematic diagram showing current distribution on the first radiator and the second radiator when the second radiator is excited and the first radiator is connected to the 50 ohm connection line after the first decoupling structure is added in the antenna device according to the embodiment of the present application;

Fig. 26 is a schematic diagram showing a current distribution on a ground plane when a second radiator is excited and the first radiator is connected to a 50 ohm connection line after a first decoupling structure is added to the antenna device according to an embodiment of the present application;

Fig. 27 is a schematic diagram showing a mode and an isolation change of the first radiator and the second radiator in a frequency band by adjusting a grounding point position of the first decoupling structure in the antenna device according to an embodiment of the present application;

fig. 28 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 29 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the application;

fig. 30 is a schematic diagram showing antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the application;

fig. 31 is a schematic structural diagram of an antenna device according to an embodiment of the present application;

FIG. 32 is a schematic view of a portion of the structure of FIG. 31;

fig. 33 is a schematic structural diagram of a first matching circuit in an antenna device according to an embodiment of the present application;

Fig. 34 is an S-parameter diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 35 is an antenna efficiency diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 36 is an ECC representation of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 37 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 38 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna device according to an embodiment of the application;

fig. 39 is a schematic diagram showing antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the application;

Fig. 40 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 41 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna device according to an embodiment of the application;

fig. 42 is a schematic diagram showing antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 43 is a schematic cross-sectional view of an antenna device according to an embodiment of the present application;

fig. 44 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 45 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the application;

fig. 46 is a schematic diagram showing antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 47 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 48 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the application;

fig. 49 is a schematic diagram showing antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the application;

fig. 50 is a schematic structural diagram of an antenna device according to an embodiment of the present application;

FIG. 51 is a schematic view of a portion of the structure of FIG. 50;

fig. 52 is an S-parameter diagram of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 53 is an antenna efficiency diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 54 is an ECC representation of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 55 is a schematic diagram showing a change of isolation degree of whether a first decoupling structure is added in an antenna device according to an embodiment of the present application;

Fig. 56 is a schematic diagram of current distribution on a first radiator and a second radiator without adding a first decoupling structure in an antenna device according to an embodiment of the present application;

fig. 57 is a schematic diagram of current distribution on a ground plate without adding a first decoupling structure in an antenna device according to an embodiment of the present application;

Fig. 58 is a schematic diagram of current distribution on a first radiator and a second radiator after a first decoupling structure is added in an antenna device according to an embodiment of the present application;

fig. 59 is a schematic diagram of current distribution on a ground plane after adding a first decoupling structure to an antenna device according to an embodiment of the present application;

fig. 60 is a schematic diagram showing current distribution on a first radiator and a second radiator when the first radiator is excited and the second radiator is connected to a 50 ohm connection line at 2.31GHz after a first decoupling structure is added in an antenna device according to an embodiment of the present application;

fig. 61 is a schematic diagram of current distribution on a ground plane when a first radiator is excited and a second radiator is connected to a 50 ohm connection line at 2.31GHz after a first decoupling structure is added in an antenna device according to an embodiment of the present application;

Fig. 62 is a schematic diagram showing current distribution on the first radiator and the second radiator when the second radiator is excited at 2.31GHz and the first radiator is connected to the 50 ohm connection line after the first decoupling structure is added in the antenna device according to the embodiment of the present application;

fig. 63 is a schematic view of current distribution on a ground plane when a second radiator is excited at 2.31GHz and a first radiator is connected to a 50 ohm connection line after a first decoupling structure is added in an antenna device according to an embodiment of the present application;

Fig. 64 is a schematic diagram showing current distribution on the first radiator and the second radiator when the first radiator is excited and the second radiator is connected to the 50 ohm connection line at 2.45GHz after the first decoupling structure is added in the antenna device according to the embodiment of the present application;

fig. 65 is a schematic diagram showing a current distribution on a ground plane when a first radiator is excited and a second radiator is connected to a 50 ohm connection line at 2.45GHz after a first decoupling structure is added in an antenna device according to an embodiment of the present application;

Fig. 66 is a schematic diagram showing current distribution on the first radiator and the second radiator when the second radiator is excited at 2.45GHz and the first radiator is connected to the 50 ohm connection line after the first decoupling structure is added in the antenna device according to the embodiment of the present application;

fig. 67 is a schematic diagram showing a current distribution on a ground plane when a second radiator is excited at 2.45GHz and a first radiator is connected to a 50 ohm connection line after a first decoupling structure is added to an antenna device according to an embodiment of the present application;

Fig. 68 is a schematic structural diagram of an antenna device according to an embodiment of the present application;

FIG. 69 is a schematic view of a portion of the structure of FIG. 68;

Fig. 70 is an S-parameter diagram of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 71 is an antenna efficiency diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 72 is an ECC representation of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 73 is a schematic diagram showing a change of isolation degree of whether a first decoupling structure is added in an antenna device according to an embodiment of the present application;

fig. 74 is a schematic diagram of low-frequency current distribution of the first radiator and the second radiator by adding the first decoupling structure to the antenna device according to an embodiment of the present application;

Fig. 75 is a schematic diagram of low-frequency current distribution on a ground plate by adding a first decoupling structure to an antenna device according to an embodiment of the present application;

Fig. 76 is a schematic diagram showing a low-frequency current distribution of the first radiator and the second radiator by adding the first decoupling structure to the antenna device according to an embodiment of the present application;

Fig. 77 is a schematic diagram of low-frequency current distribution on a ground plate when a first decoupling structure is added to an antenna device according to an embodiment of the present application;

fig. 78 is a schematic diagram of current distribution on a first radiator and a second radiator without adding a first decoupling structure in an antenna device according to an embodiment of the present application;

Fig. 79 is a schematic diagram of current distribution on a ground plane by adding a first decoupling structure to an antenna device according to an embodiment of the present application;

fig. 80 is a schematic diagram of current distribution on a first radiator and a second radiator without adding a first decoupling structure in an antenna device according to an embodiment of the present application;

Fig. 81 is a schematic diagram of current distribution on a ground plane by adding a first decoupling structure to an antenna device according to an embodiment of the present application;

Fig. 82 is a schematic diagram showing a high-frequency current distribution of a first decoupling structure added to an antenna device according to an embodiment of the present application;

fig. 83 is a schematic diagram showing a high-frequency current distribution on a ground plate by adding a first decoupling structure to an antenna device according to an embodiment of the present application;

fig. 84 is a schematic diagram showing a high-frequency current distribution of the first radiator and the second radiator by adding the first decoupling structure to the antenna device according to an embodiment of the present application;

fig. 85 is a schematic diagram of a high-frequency current distribution on a ground plate by adding a first decoupling structure to an antenna device according to an embodiment of the present application;

Fig. 86 is a schematic structural diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 87 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 88 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the application;

Fig. 89 is a schematic diagram of antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the application;

fig. 90 is a schematic structural diagram of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 91 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 92 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the application;

Fig. 93 is a schematic diagram showing antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 94 is a schematic structural diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 95 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 96 is a schematic diagram showing isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 97 is a schematic diagram of antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 98 is a schematic structural diagram of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 99 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 100 is a schematic diagram of isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

Fig. 101 is a schematic diagram of antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

Fig. 102 is a schematic structural diagram of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

fig. 103 is a diagram showing current distribution diagrams of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 104 is a schematic diagram of isolation parameters of a first radiator and a second radiator in an antenna apparatus according to an embodiment of the present application;

Fig. 105 is a schematic diagram of antenna efficiency of a first radiator and a second radiator in an antenna device according to an embodiment of the present application;

fig. 106 is a schematic structural diagram of a first radiator, a second radiator, a third radiator, and a fourth radiator in an antenna device according to an embodiment of the present application;

fig. 107 is a schematic diagram of isolation parameters of an antenna device according to an embodiment of the application;

fig. 108 is a schematic diagram of antenna efficiency of an antenna device according to an embodiment of the application.

Reference numerals illustrate:

100-antenna device; 100 a-a first substrate;

100 b-a second substrate; 110-a first radiator;

111-a first gap region; 112-a first matching circuit;

113-a first opening; 1131-a first capacitance;

120-a second radiator; 121-a second gap region;

122-a second matching circuit; 123-a second opening;

1231-a second capacitance; 110 a-a first coupling gap;

130-a first decoupling structure; 130 a-a second coupling gap;

130 b-a third coupling gap; 131-first lateral decoupling stubs;

1311-a middle attachment region; 1311 a-midpoint;

1311 b-first connection region; 1311 c-a second connection region;

132-first longitudinal decoupling knots; 1312-a first end of a first lateral decoupling stub;

1313-a second end of the first lateral decoupling stub; a1-a first coupling current;

a2-a second coupling current; a3—a third coupling current;

a0-radiation current; 140 a-a first ground wall;

140 b-a second ground wall; 140 c-a ground plate;

150 a-a first feed point; 150 b-a second feed point;

160-a third radiator; 160 a-fourth coupling gap;

170-a second decoupling structure; 170 a-fifth coupling gap;

170 b-sixth coupling gap; 180-fourth radiator;

180 a-seventh coupling gap; 190-a third decoupling structure;

190 a-eighth coupling gap; 190 b-ninth coupling gap;

L1-the thickness direction of the first substrate; i1-a first excitation current;

i2-near field coupling current; 200-a mobile phone;

210-a display screen; 211-a first opening;

220-middle frame; 221-a metal middle plate;

222-frame; 2221-top bezel;

2222-bottom bezel; 2223-left side border;

2224-right side border; 230-a circuit board;

240-cell; 250-battery cover;

251-a second opening; 260-a front camera module;

270-a rear camera module; 280-antenna area.

Detailed Description

The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application, as will be described in detail with reference to the accompanying drawings.

The embodiment of the application provides an electronic device, which may include, but is not limited to, a mobile or fixed terminal with an antenna, such as a smart speaker, a smart door lock, a mobile phone, a tablet computer, a notebook computer, a router, a customer premise equipment (Customer Premise Equipment, CPE), an internet of things (THE INTERNET of Things, IOT) device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a handheld computer, an interphone, a netbook, a Point of sale (POS) machine, a personal digital assistant (personal DIGITAL ASSISTANT, PDA), a wearable device, a virtual reality device, a wireless U disk, a bluetooth sound/earphone, or a vehicle-mounted front-end, a vehicle recorder, a security device, and the like.

In the embodiment of the present application, the mobile phone 200 is taken as an example of the electronic device, and the mobile phone 200 provided in the embodiment of the present application may be a curved screen mobile phone, a flat panel mobile phone, or a folded screen mobile phone. Fig. 1 and fig. 2 show an overall structure and a split structure of a mobile phone 200, respectively, and a display screen 210 of the mobile phone 200 according to an embodiment of the present application may be a water drop screen, liu Haibing, a full screen or a hole digging screen (see fig. 1), for example, a first opening 211 is formed in the display screen 210, and the hole digging screen is taken as an example for the following description.

Referring to fig. 2, the mobile phone 200 may include: the display 210, the middle frame 220, the battery cover 250, and the battery 240 between the middle frame 220 and the battery cover 250, wherein the battery 240 may be disposed on a side of the middle frame 220 facing the battery cover 250 (as shown in fig. 2), or the battery 240 may be disposed on a side of the middle frame 220 facing the display 210, e.g., a side of the middle frame 220 facing the battery cover 250 may have a battery compartment (not shown), in which the battery 240 is mounted.

In some other examples, the cell phone 200 may further include a circuit board 230, wherein the circuit board 230 may be disposed on the middle frame 220, for example, the circuit board 230 may be disposed on a side of the middle frame 220 facing the battery cover 250 (as shown in fig. 2), or the circuit board 230 may be disposed on a side of the middle frame 220 facing the display 210, and the display 210 and the battery cover 250 are disposed on both sides of the middle frame 220, respectively.

The battery 240 may be connected to the charge management module and the circuit board 230 through a power management module, where the power management module receives input from the battery 240 and/or the charge management module and supplies power to the processor, the internal memory, the external memory, the display 210, the camera module, the communication module, and the like. The power management module may also be configured to monitor the capacity of the battery 240, the number of cycles of the battery 240, and parameters such as the state of health (leakage, impedance) of the battery 240. In other embodiments, the power management module may also be disposed in the processor of the circuit board 230. In other embodiments, the power management module and the charge management module may be disposed in the same device.

When the mobile phone 200 is a flat-screen mobile phone 200, the display 210 may be an Organic Light-Emitting Diode (OLED) display or a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD), and when the mobile phone 200 is a curved-screen mobile phone 200, the display 210 may be an OLED display.

With continued reference to fig. 2, the middle frame 220 may include a metal middle plate 221 and a rim 222, the rim 222 being disposed one week around the outer circumference of the metal middle plate 221. In general, the bezel 222 may include a top frame 2221, a bottom frame 2222, a left side frame 2223, and a right side frame 2224, the top frame 2221, the bottom frame 2222, the left side frame 2223, and the right side frame 2224 enclosing the bezel 222 in a square ring structure. Among them, the material of the metal middle plate 221 includes, but is not limited to, an aluminum plate, an aluminum alloy, stainless steel, a steel aluminum composite die-casting plate, a titanium alloy, a magnesium alloy, or the like. The frame 222 may be a metal frame, a ceramic frame, or a glass frame. When bezel 222 is a metal bezel, the material of the metal bezel includes, but is not limited to, aluminum alloy, stainless steel, steel aluminum composite die cast plate, titanium alloy, or the like. The metal middle plate 221 and the frame 222 may be clamped, welded, glued or integrally formed, or the metal middle plate 221 and the frame 222 may be fixedly connected by injection molding.

Referring to fig. 2, the top frame 2221 and the bottom frame 2222 are oppositely disposed, the left side frame 2223 and the right side frame 2224 are oppositely disposed, the top frame 2221 is connected with one end of the left side frame 2223 and one end of the right side frame 2224 by a rounded corner, and the bottom frame 2222 is connected with the other end of the left side frame 2223 and the other end of the right side frame 2224 by a rounded corner, so as to form a rounded corner rectangular area together. The battery cover ground plane is disposed in the rounded rectangular area and is connected to the top frame 2221, the bottom frame 2222, the left side frame 2223 and the right side frame 2224, respectively. It is understood that the battery cover ground plane may be the battery cover 250 of the handset 200.

The battery cover 250 may be a metal battery cover, a glass battery cover, a plastic battery cover, or a ceramic battery cover, and in the embodiment of the present application, the material of the battery cover 250 is not limited, and is not limited to the above examples.

It should be noted that, in some examples, the battery cover 250 of the mobile phone 200 may be connected to the frame 222 to form an integrally formed (Unibody) battery cover, for example, the mobile phone 200 may include: the display 210, the metal middle plate 221 and the battery cover, the battery cover may be a battery cover formed by integrally forming (Unibody) the frame 222 and the battery cover 250, so that the circuit board 230 and the battery 240 are located in a space enclosed by the metal middle plate 221 and the battery cover.

In addition, in a possible implementation manner, the battery cover 250 may further be provided with a second opening 251, which is used as a light transmission area of the rear camera module 270. Similarly, the first opening 211 on the display 210 can also be used as a light-transmitting area of the front camera module 260.

In order to implement the shooting function, the mobile phone 200 may further include: camera module with continued reference to fig. 2, the camera module may include a front camera module 260 and a rear camera module 270. The rear camera module 270 may be disposed on a surface of the metal middle plate 221 facing the battery cover 250, the display screen 210 is provided with an opening 211, and a lens of the rear camera module 270 corresponds to the opening 211. The battery cover 250 may be provided with mounting holes for mounting a part of the rear camera module 270, and of course, the rear camera module 270 may be mounted on a surface of the battery cover 250 facing the metal middle plate 221. The front camera module 260 may be disposed on a surface of the metal middle plate 221 facing the display screen 210, or the front camera module 260 may be disposed on a surface of the metal middle plate 221 facing the battery cover 250, or the front camera module 260 may also be disposed on a surface of the battery cover 250 facing the display screen 210, where an opening for exposing a lens end of the front camera module 260 is formed on the metal middle plate 221.

In the embodiment of the present application, the setting positions of the front camera module 260 and the rear camera module 270 include, but are not limited to, the above description. In some embodiments, the number of front camera modules 260 and rear camera modules 270 in the mobile phone 200 may be 1 or N, where N is a positive integer greater than 1.

It should be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the electronic device. In other embodiments of the application, the electronic device may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

To further increase the achievable functions of the mobile phone 200, an antenna may be provided on the mobile phone 200. For example, in fig. 3, an antenna may be provided within the antenna area 280 of the handset 200. As the data transmission rate requirements are continuously improved, the rapid development of multiple-Input multiple-Output (MIMO) Multi-antenna technology is accelerated. The MIMO antenna can improve the spectrum efficiency, increase the channel capacity and the transmission rate, and improve the reliability of the received signal of the wireless communication system, so it is one of the key development technologies of multiple Gbps transmission rate communication systems. At present, the specifications of double antennas, three antennas and four antennas are gradually improved, the MIMO antenna occupies a larger layout area on the mobile phone, other antenna spaces are necessarily compressed, and the influence on other antennas (such as middle-high frequency antennas) is great. Therefore, it is urgent to find a new MIMO antenna scheme that has less influence on other antennas.

Specifically, when a plurality of antennas operating in the same frequency band are placed in the limited space of the terminal due to limited space of the mobile phone, the problem of mutual coupling interference can be generated due to too close distance between the antennas, so that the isolation between multiple antennas is poor, even the packet correlation coefficient (Envelope Correlation Coefficient, ECC) between the multiple antennas is improved, and the radiation characteristic of the antennas is attenuated. Thus, a decrease in the transmission rate of the antenna is caused, and difficulties in compact integration design of multiple antennas are increased.

In order to solve the above-mentioned problems, in the related art, taking a patch dual antenna as an example, a slot resonance structure (Slot resonant structure) is generally implanted on a ground plane, the slot resonance structure is a decoupling component of the dual antenna, and by properly adjusting the length and width of the slot resonance structure, the isolation of the dual antenna in the operating frequency band can be effectively improved. However, in this design, the slot resonance structure occupies an excessive design area on the electronic device, and is liable to affect the layout of other antennas and other devices in the electronic device.

Based on this, an embodiment of the present application provides an antenna apparatus, which may be applied to the above-mentioned electronic device (for example, mobile phone 200), and the antenna apparatus includes: the first radiator, the second radiator and the first decoupling structure are provided with a first coupling gap; at least part of the orthographic projection of the first decoupling structure towards the first substrate is positioned in the first coupling gap, and a second coupling gap and a third coupling gap are respectively formed between the first decoupling structure and the first radiator and between the first decoupling structure and the second radiator. Therefore, the antenna device can be realized in a limited design space, the antenna design space inside the electronic equipment is effectively saved to a certain extent, and the influence on other antennas can be reduced, namely, the current coupling between the antennas is reduced to improve the isolation degree, so that the influence on the impedance matching and radiation characteristics of the other antennas can be avoided.

It should be noted that, the antenna device provided by the present application is suitable for an electronic device adopting one or more of the following MIMO (multiple-in multiple-out) communication technologies: such as long term evolution (long term evolution, LTE) communication technology, wi-Fi communication technology, 5G communication technology, SUB-6G communication technology, and other MIMO communication technologies in the future, etc. The MIMO communication technology is an antenna system that uses a plurality of antennas at both a transmitting end and a receiving end and forms a plurality of channels between transmission and reception, and has extremely high spectrum utilization efficiency.

The following description will be made with reference to the drawings by taking different embodiments as examples, respectively (the following embodiments do not emphasize the requirements of the communication network, and only illustrate the operation characteristics of the antenna device in terms of frequency.

Referring to fig. 4 and 5 and fig. 6 and 7, an embodiment of the present application provides an antenna apparatus 100, where the antenna apparatus 100 may be applied to, for example, an electronic device (for example, a mobile phone 200 or a computer), and specifically, the antenna apparatus 100 may at least include: the first and second radiators 110 and 120 provided on the first substrate 100a may have a first coupling gap 110a therebetween.

The antenna device 100 may further include: the first decoupling structure 130, wherein at least a portion of the orthographic projection of the first decoupling structure 130 toward the first substrate 100a is located within the first coupling gap 110a, and a second coupling gap 130a may be formed between the first decoupling structure 130 and the first radiator 110, and a third coupling gap 130b may be formed between the first decoupling structure 130 and the second radiator 120.

In operation, the first radiator 110 is coupled to the second radiator 120 through the first coupling gap 110a to form a first coupling current A1, the second radiator 120 is coupled to the first radiator 110 through the first coupling gap 110a to form a second coupling current A2, the first decoupling structure 130 is configured to couple from the first radiator 110 through the second coupling gap 130a to form a third coupling current A3, and couple the third coupling current A3 to the second radiator 120 through the third coupling gap 130b, such that the third coupling current A3 coupled to the second radiator 120 at least partially cancels the first coupling current A1, and the first decoupling structure 130 is further configured to couple from the second radiator 120 through the third coupling gap 130b to form a fourth coupling current (not shown in the figure) and couple the fourth coupling current to the first radiator 110 through the second coupling gap 130a to at least partially cancel the fourth coupling current A2 coupled to the first radiator 110.

In fig. 4 and 6, the first feeding point 150a is fed, and the second feeding point 150b is not fed, for example, the first radiator 110 generates the radiation current A0, and is coupled to the second radiator 120 through the first coupling gap 110a to form the first coupling current A1, the first decoupling structure 130 is configured to couple the first radiator 110 through the second coupling gap 130a to form the third coupling current A3, and couple the third coupling current A3 to the second radiator 120 through the third coupling gap 130b, so that the third coupling current A3 coupled to the second radiator 120 at least partially cancels the first coupling current A1. In practical application, the first feeding point 150a and the second feeding point 150b are generally fed simultaneously.

Specifically, in the antenna device 100, a first coupling gap 110a is formed between the first radiator 110 and the second radiator 120, and by providing the first decoupling structure 130, the first decoupling structure 130 is designed such that at least a portion of the orthographic projection toward the first substrate 100a is located in the first coupling gap 110a, that is, the first decoupling structure 130 is disposed in the first radiator 110 and the second radiator 120, and a second coupling gap 130a is formed between the first decoupling structure 130 and the first radiator 110, and a third coupling gap 130b is formed between the first decoupling structure 130 and the second radiator 120.

The first radiator 110 is coupled to the second radiator 120 through the first coupling gap 110a to form a first coupling current A1, the first decoupling structure 130 is coupled from the first radiator 110 through the second coupling gap 130a to form a third coupling current A3, and the third coupling current A3 is coupled to the second radiator 120 through the third coupling gap 130b, so that the third coupling current A3 coupled to the second radiator 120 and the first coupling current A1 at least partially cancel each other. The second radiator 120 is coupled to the first radiator 110 through the first coupling gap 110a to form a second coupling current A2, the first decoupling structure 130 is coupled from the second radiator 120 through the third coupling gap 130b to form a fourth coupling current, and the fourth coupling current is coupled to the first radiator 110 through the second coupling gap 130a such that the fourth coupling current coupled to the first radiator 110 and the second coupling current A2 at least partially cancel each other.

In this way, the third coupling current A3 formed by the first decoupling structure 130 and the first coupling current A1 formed by coupling the first radiator 110 to the second radiator 120 can cancel each other, and the fourth coupling current formed by the first decoupling structure 130 and the second coupling current A2 formed by coupling the second radiator 120 to the first radiator 110 can cancel each other, so that the current coupling between the first radiator 110 and the second radiator 120 can be reduced, and therefore, the embodiment of the application not only can reduce the overall design size of the antenna device 100, reduce the occupied space of the antenna device 100 in an electronic device, and prevent the impedance matching and radiation characteristics of other antennas and the layout of other devices in the electronic device from being influenced, but also can effectively reduce the current coupling between the first radiator 110 and the second radiator 120, i.e. effectively improve the isolation between the first radiator 110 and the second radiator 120, thereby further improving the antenna efficiency of the antenna device 100.

In the prior art, referring to fig. 8 to 10, the first radiator 110 and the second radiator 120 are each a patch antenna with 0.5 wavelength horizontal polarization, and when the horizontal arrangement of the first radiator 110 and the second radiator 120 is compact, when the first radiator 110 is excited (the first excitation current I1 shown in fig. 9), and the second radiator 120 is loaded with 50 ohms, part of the near field coupling current I2 will be coupled to the second radiator 120, resulting in poor isolation of the first radiator 110 and the second radiator 120 in the common operating band, which makes the antenna device more difficult to be applied to MIMO multi-antenna systems.

In the embodiment of the present application, referring to fig. 4 and 6, when the first radiator 110 and the second radiator 120 are horizontally polarized (i.e. the excitation current direction is shown as the first coupling current A1 and the second coupling current A2 in the drawing), the large current area (i.e. the first coupling gap 110 a) of the antenna device 100 is located between the right edge of the first radiator 110 and the left edge of the second radiator 120. In fig. 4 and 6, after the first decoupling structure 130 of one 0.5 wavelength is coupled to the first coupling gap 110a between the two radiators, there are a second coupling gap 130a and a third coupling gap 130b between the first radiator 110 and the second radiator 120 and the first decoupling structure 130, respectively. By properly adjusting the sizes of the three coupling gaps, the length and width of the first decoupling structure 130, two induced currents (i.e., the third coupling current A3 and the fourth coupling current in fig. 4 and 6) from the first decoupling structure 130 can be generated. The direction of the induced current is opposite to the direction of the coupled current, that is, the scheme of adding the first decoupling structure 130 provided by the embodiment of the present application can resist the coupled current from the first radiator 110 to the second radiator 120 or from the second radiator 120 to the first radiator 110, so as to improve the near field isolation between the two antennas (i.e., the first radiator 110 and the second radiator 120), and further improve the efficiency performance of the dual antennas.

In some embodiments, the width of the first coupling gap 110a (i.e., the distance between the first radiator 110 and the second radiator 120 in the direction perpendicular to the extension direction of the first coupling gap 110 a) may be 4mm-6mm, and illustratively, the width of the first coupling gap 110a may be 4mm, 4.5mm, 5mm, 5.5mm, 6mm, or the like, which is not limited by the embodiment of the present application.

Additionally, it is understood that, in the embodiment of the present application, the setting position of the first decoupling structure 130 may specifically further include, but is not limited to, the following several possible implementations:

One possible implementation is: the outer edge of one side of the first radiator 110 facing the first coupling gap 110a is provided with a first notch area 111, the first notch area 111 is communicated with the first coupling gap 110a, and the orthographic projection part of the first decoupling structure 130 facing the substrate is positioned in the first notch area 111.

By providing the first notch region 111 on the outer edge of the side of the first radiator 110 facing the first coupling gap 110a, the orthographic projection part of the first decoupling structure 130 facing the substrate is located in the first notch region 111, and the first notch region 111 can provide a larger space for the first decoupling structure 130 and avoid the first decoupling structure 130 to a certain extent.

Another possible implementation is: the second radiator 120 is provided with a second notch area 121 at the outer edge of one side facing the first coupling gap 110a, the second notch area 121 is communicated with the first coupling gap 110a, and the orthographic projection part of the first decoupling structure 130 facing the substrate is located in the second notch area 121.

By providing the second notch area 121 on the outer edge of the side of the second radiator 120 facing the first coupling gap 110a, the orthographic projection part of the first decoupling structure 130 facing the substrate is located in the second notch area 121, and the second notch area 121 can provide a larger space for the first decoupling structure 130 and avoid the first decoupling structure 130 to a certain extent.

Yet another possible implementation is: referring to fig. 11, a first notch area 111 is formed on an outer edge of the first radiator 110 facing the first coupling gap 110a, a second notch area 121 is formed on an outer edge of the second radiator 120 facing the first coupling gap 110a, the first notch area 111 and the second notch area 121 are both in communication with the first coupling gap 110a, a part of the orthographic projection of the first decoupling structure 130 facing the substrate is located in the first notch area 111, a part of the orthographic projection of the first decoupling structure is located in the second notch area 121, and the rest of the orthographic projection is located in the first coupling gap 110 a.

By providing the first notch region 111 on the outer edge of the first radiator 110 facing the first coupling gap 110a and the second notch region 121 on the outer edge of the second radiator 120 facing the first coupling gap 110a, the orthographic projection of the first decoupling structure 130 facing the substrate is partially located in the first notch region 111 and partially located in the second notch region 121, and the first notch region 111 and the second notch region 121 can provide a larger space for the first decoupling structure 130 and certain avoidance of the first decoupling structure 130.

In the embodiment of the present application, taking the electronic device as the mobile phone 200 as an example, the patch dual antenna with high isolation (i.e. the first radiator 110 and the second radiator 120) may be disposed on the battery cover 250. Of course, the specific arrangement positions of the first radiator 110 and the second radiator 120 in the embodiment of the present application are not limited thereto, and may be other components in the electronic device, such as a middle frame.

On the basis of the above embodiment, the antenna device 100 may further be provided with a grounding wall, where the specific placement manner of the grounding wall may include, but is not limited to, the following several possible implementation manners:

one possible implementation is: the antenna device 100 may further include: and a first ground wall 140a, wherein the first ground wall 140a may be positioned within the first substrate 100a, and one end of the first ground wall 140a is connected to one of the first and second radiators 110 and 120, and the other end of the first ground wall 140a is used for grounding.

Another possible implementation is: the antenna device 100 may further include: and a second ground wall 140b, wherein the second ground wall 140b may be positioned within the first substrate 100a, and one end of the second ground wall 140b is connected to the other of the first and second radiators 110 and 120, and the other end of the second ground wall 140b is used for grounding.

Yet another possible implementation is: referring to fig. 11, the antenna device 100 may further include: the first and second ground walls 140a and 140b, wherein the first and second ground walls 140a and 140b may be located in the first substrate 100a, one end of the first ground wall 140a is connected to one of the first and second radiators 110 and 120, the other end of the first ground wall 140a is connected to ground, one end of the second ground wall 140b is connected to the other of the first and second radiators 110 and 120, and the other end of the second ground wall 140b is connected to ground.

By providing the first and second ground walls 140a and 140b in the first substrate 100a, the first and second radiators 110 and 120 can be grounded.

Wherein, in some embodiments, the antenna device 100 may further comprise: at least one ground point (not shown) provided on the ground plate 140c, the other end of the first ground wall 140a and the other end of the second ground wall 140b are connected to the ground point, thereby achieving the ground connection of the first ground wall 140a and the second ground wall 140 b.

The dimensions of the ground plate 140c in the embodiment of the present application are not limited.

In addition, in the embodiment of the present application, the heights of the first and second radiators 110 and 120 from the ground plate 140c may be 2mm to 3mm. For example, in some embodiments, the heights of the first and second radiators 110, 120 from the ground plate 140c may be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, or any intermediate value between two adjacent values, etc., as embodiments of the present application are not limited in this regard.

It should be noted that, the numerical values and numerical ranges referred to in the present application are approximate values, and may have a certain range of errors due to the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.

It is understood that in the embodiment of the present application, the specific structure of the first decoupling structure 130 may include, but is not limited to, the following several possible implementations:

One possible implementation is: as shown in fig. 12, the first decoupling structure 130 may include: the first lateral decoupling knuckle 131, wherein an extension direction of the first lateral decoupling knuckle 131 may be perpendicular to an extension direction of the first coupling gap 110 a.

In an actual application scenario, the length of the first lateral decoupling branch 131 may be 23mm-25mm, for example, the length of the first lateral decoupling branch 131 may be 23mm, 23.2mm, 23.4mm, 23.6mm, 23.8mm, 24mm, 24.2mm, 24.4mm, 24.6mm, 24.8mm, or 25mm, which is not limited in this embodiment of the present application. The width of the first lateral decoupling branch 131 may be 1.5mm-2.5mm, for example, the width of the first lateral decoupling branch 131 may be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm, etc., which is not limited by the embodiment of the present application.

Another possible implementation is: as shown in fig. 12, the first decoupling structure 130 may include: the first lateral decoupling branch 131 and the first longitudinal decoupling branch 132, the first longitudinal decoupling branch 132 being connected to the first lateral decoupling branch 131, wherein one end of the first longitudinal decoupling branch 132 is used for grounding. At this time, as shown in fig. 12, the first decoupling structure 130 has a T-shaped structure. In other embodiments, the first decoupling structure 130 may also be, for example, an H-shaped structure, or the like.

By changing the shape of the first decoupling structure 130, not only the design flexibility of the first decoupling structure 130 in two-dimensional space can be increased, but also the efficiency of the multiple antennas in the frequency band can be improved.

It should be noted that, in an embodiment of the present application, the first longitudinal decoupling branch 132 may be connected to the middle connection region 1311 of the first lateral decoupling branch 131.

Specifically, the middle connection region 1311 may include a midpoint 1311a of the first lateral decoupling knuckle 131. Or the intermediate connection region 1311 may further include: a first connection region 1311b and a second connection region 1311c, wherein the first connection region 1311b may be located within a range in which the midpoint 1311a of the first lateral decoupling branch 131 extends 1mm toward the first end 1312 of the first lateral decoupling branch, and the second connection region 1311c may be located within a range in which the midpoint 1311a of the first lateral decoupling branch 131 extends 1mm toward the second end 1313 of the first lateral decoupling branch.

It should be noted that, whether the first decoupling structure 130 shown in fig. 6 or the first decoupling structure 130 shown in fig. 4, the technical principle of the above two decoupling structures is to integrate the first decoupling structure 130 inside the dual-antenna radiator. Thereby effectively reducing the overall design size of the dual antenna.

In addition, if the dual antenna needs to generate two induced currents from the first decoupling structure 130 to cancel the coupled currents, the dual antenna in the prior art needs to increase the size of the two first decoupling structures 130. The design advantage of the embodiment of the present application is that the first decoupling structure 130 is integrated inside the two radiators, and only one first decoupling structure 130 is needed to generate two induced currents to cancel the coupled currents, so that the dual antenna still has high isolation performance under the small-sized design structure in the embodiment of the present application.

In addition, in the embodiment of the present application, the antenna apparatus 100 may further include: a first feeding point 150a and a second feeding point 150b, wherein the first feeding point 150a may be located at a side of the first radiator 110 facing away from the first coupling gap 110a, and the second feeding point 150b may be located at a side of the second radiator 120 facing away from the first coupling gap 110 a. The first feeding point 150a feeds the first radiator 110, the second feeding point 150b feeds the second radiator 120, and the first feeding point 150a and the second feeding point 150b feed on the horizontal plane where the first radiator 110 and the second radiator 120 are located, contributing to the excitation of the horizontally polarized patch antenna mode.

Specifically, in one scenario, referring to fig. 13 and 14, the size of the ground plate 140c is 150×75mm ², the antenna device 100 is an inverted-F patch dual antenna, the excitation current directions of the first radiator 110 and the second radiator 120 are horizontally polarized, the heights of the first radiator 110 and the second radiator 120 from the ground plate 140c are 2mm, the width of the first coupling gap 110a is 5mm, the total size of the first radiator 110 and the second radiator 120 is 46×37mm ², a 0.5-wavelength T-shaped resonant structure (i.e., the first decoupling structure 130) is coupled in the first coupling gap 110a, the length of the first decoupling structure 130 is 23.8mm, and the width of the first decoupling structure 130 is 2mm. The first decoupling structure 130 has a second coupling gap 130a and a third coupling gap 130b between the first radiator 110 and the second radiator 120, respectively. With the above-described arrangements, near-field current coupling between the first radiator 110 and the second radiator 120 can be reduced, and thus isolation between the first radiator 110 and the second radiator 120 can be improved.

Fig. 15 shows the S-parameter results of the first and second radiators 110 and 120 in the frequency band, and it can be seen that the first and second radiators 110 and 120 can cover the frequency band of 2.435GHz to 2.475GHz, and the isolation is greater than 18dB in the frequency band. Fig. 16 shows the efficiency of the first radiator 110 and the second radiator 120 in the frequency band, and fig. 17 shows the packet correlation coefficient (ECC) performance of the first radiator 110 and the second radiator 120. As can be seen from the figure, the system efficiency of the first radiator 110 and the second radiator 120 in the frequency band of 2.425 GHz-2.48 GHz can approximately meet-3.8 dB, and the ECC is smaller than 0.1 in the frequency band, and the experimental result proves that the antenna device 100 is suitable for being applied to MIMO system operation.

In addition, fig. 18 shows S-parameter performance after the antenna device has the first decoupling structure 130, and the result in the figure shows that when the antenna device has not the first decoupling structure 130, the isolation in the frequency band of 2.435GHz to 2.47GHz is poor, and the isolation in the frequency band is only greater than 6.5dB. When the first decoupling structure 130 is coupled in the antenna device, a high point of isolation can be generated in the design band, and the isolation in the design band can be improved from 6.5dB to 18dB.

Fig. 19 and 20 are current distribution diagrams of the antenna device without the first decoupling structure 130 on the radiator and the ground plate 140 c. Fig. 21 and 22 show current distribution diagrams of the antenna device added with the first decoupling structure 130 for the radiator and the ground plate 140 c. In the drawings, when the first radiator 110 is excited and the second radiator 120 is connected to the 50 ohm connection line, when the antenna device does not incorporate the first decoupling structure 130, the current with a stronger ground plane surface is led to the second radiator 120 when the first radiator 110 is excited. That is, the two feed points of the first radiator 110 and the second radiator 120 have strong current coupling, so that the near field isolation characteristics of the first radiator 110 and the second radiator 120 are degraded.

When the antenna device is connected to the first decoupling structure 130, since the second coupling gap 130a and the third coupling gap 130b are respectively disposed between the first radiator 110 and the second radiator 120 and the first decoupling structure 130, by properly adjusting the sizes of the second coupling gap 130a and the third coupling gap 130b and the length and the width of the first decoupling structure 130, two induced currents (i.e., the third coupling current A3 and the fourth coupling current) can be generated, and the induced currents can offset the coupling currents (i.e., the first coupling current A1 and the second coupling current A2) between the first radiator 110 and the second radiator 120 in the space, so that the current coupling between the two antennas is effectively reduced, and good near-field isolation characteristics are provided between the first radiator 110 and the second radiator 120.

Comparing whether the first decoupling structure 130 is added or not to distribute the current on the antenna and the ground plate 140c, it can be known that after the first decoupling structure 130 is added to the antenna device, the coupling current between the antenna and the ground plate 140c is reduced, so that the first decoupling structure 130 with a wavelength of 0.5 is coupled between the first radiator 110 and the second radiator 120, which can enable the dual antenna to have a low coupling characteristic.

Fig. 23-26 show the variation of the surface current by adding the first decoupling structure 130 to the inverted-F dual antenna. Fig. 23 and 24 are cases where the first radiator 110 is excited and the second radiator 120 is connected to a 50 ohm connection line. Fig. 25 and 26 are cases where the second radiator 120 is excited and the first radiator 110 is connected to a 50 ohm connection line. Fig. 27 shows the performance of the dual antenna at the S parameter by changing the ground position of the first decoupling structure 130 (i.e., the connection position of the first longitudinal decoupling stub 132 on the first lateral decoupling stub 131). As can be seen from the results, as the grounding point of the first decoupling structure 130 moves to the left, the mode of the first radiator 110 is not substantially affected too much, but the mode of the second radiator 120 and the high point of isolation move to a low frequency as the position of the grounding point moves to 1 mm. Therefore, by properly adjusting the position of the grounding point of the first decoupling structure 130, the isolation performance of the dual antenna in the frequency band can be improved, and the efficiency performance of the dual antenna in the frequency band can be improved.

Fig. 28, 29 and 30 are performance graphs of an inverted-F dual antenna with one floating metal embedded therein (i.e., the first decoupling structure 130 includes only the first lateral decoupling stub 131), and as can be seen from the figures, two induced currents can be generated by the same floating metal structure, and the coupled currents are cancelled by the two induced currents, so that near-field current coupling between the first radiator 110 and the second radiator 120 can be reduced, and isolation of the dual antenna in a frequency band can be improved. Thus, further from the performance profile of the antenna, the dual antenna can cover the 2.5 GHz-2.54 GHz band and has isolation performance greater than 18dB, efficiency in the operating band is greater than-3.2 dB, and ECC is less than 0.1, and the antenna performance is excellent.

In the embodiment of the present application, as shown in fig. 31 and 32, a first matching circuit 112 (for example, the first matching circuit 112 in fig. 33) may be further disposed on a surface of the first radiator 110 facing the first substrate 100a, the first matching circuit 112 is electrically connected to the first radiator 110, a second matching circuit 122 may be disposed on a surface of the second radiator 120 facing the first substrate 100a, and the second matching circuit 122 is electrically connected to the second radiator 120, where the first matching circuit 112 and the second matching circuit 122 are both grounded.

By providing the first matching circuit 112 grounded on the side of the first radiator 110 facing the first substrate 100a, and the first matching circuit 112 is electrically connected to the first radiator 110, and providing the second matching circuit 122 grounded on the side of the second radiator 120 facing the first substrate 100a, and the second matching circuit 122 is electrically connected to the second radiator 120, single-mode dual resonance of the antenna device 100 can be achieved.

It will be appreciated that in embodiments of the present application, the first matching circuit 112 may include any one or more of a capacitance, an inductance, and a resistance, and the second matching circuit 122 may include any one or more of a capacitance, an inductance, and a resistance, which embodiments of the present application are not limited in this respect.

Specifically, in one scenario, referring to fig. 31 and 32, the size of the ground plate 140c is 150×75mm ², the antenna device 100 is an inverted-F patch dual antenna, in which the excitation current directions of the first radiator 110 and the second radiator 120 are horizontally polarized, the heights of the first radiator 110 and the second radiator 120 from the ground plate 140c are 2mm, the width of the first coupling gap 110a is 5mm, the total size of the first radiator 110 and the second radiator 120 is 46×37mm ², and the first radiator 110 and the second radiator 120 can generate single-mode dual resonance after being respectively added into the first matching circuit 112 and the second matching circuit 122. Then, a 0.5-wavelength T-shaped resonant structure (i.e., the first decoupling structure 130) is coupled in the first coupling gap 110a, the length of the first decoupling structure 130 is 23.8mm, and the width of the first decoupling structure 130 is 2mm. The first decoupling structure 130 has a second coupling gap 130a and a third coupling gap 130b between the first radiator 110 and the second radiator 120, respectively. With the above-described arrangements, near-field current coupling between the first radiator 110 and the second radiator 120 can be reduced, and thus isolation between the first radiator 110 and the second radiator 120 can be improved.

Fig. 34 shows the S-parameter results of the first and second radiators 110 and 120 in the frequency band in this scenario, and it can be seen from the figure that the first and second radiators 110 and 120 can operate in the frequency band ranging from 2.355GHz to 2.435GHz, and the isolation is greater than 14dB in the frequency band. Fig. 35 shows the efficiency of the first radiator 110 and the second radiator 120 in the frequency band, and fig. 36 shows the packet correlation coefficient (ECC) performance of the first radiator 110 and the second radiator 120. The system efficiency of the first radiator 110 and the second radiator 120 in the frequency band of 2.35 GHz-2.44 GHz can approximately meet-3.8 dB, and the ECC is smaller than 0.1 in the frequency band, which is suitable for MIMO system operation. As shown in fig. 37 to 42, the structure of the planar antenna is extended to a linear antenna structure, and a capacitor (tunable device) is added to the T-shaped first decoupling structure 130, where the isolation of the dual antenna in the same frequency band is at least greater than 12.5dB.

It will be appreciated that the high isolation characteristic can be achieved if two inverted-F antennas are coupled to one floating metal structure (i.e., the first decoupling structure 130 includes only the first lateral decoupling stub 131).

In addition, referring to fig. 5 and 7, in the embodiment of the present application, the first decoupling structure 130 and the first radiator 110 and the second radiator 120 may be located on the same plane, at this time, a second coupling gap 130a may be formed between a portion of the first decoupling structure 130 located in the first notch region 111 and an inner edge of the first notch region 111, and a third coupling gap 130b may be formed between a portion of the first decoupling structure 130 located in the second notch region 121 and an inner edge of the second notch region 121.

By designing the first decoupling structure 130 to be on the same plane as the first radiator 110 and the second radiator 120, when the first notch region 111 is provided on the outer edge of the side of the first radiator 110 facing the first coupling gap 110a and the second notch region 121 is provided on the outer edge of the side of the second radiator 120 facing the first coupling gap 110a, a portion of the first decoupling structure 130 is located in the first notch region 111, a second coupling gap 130a is formed between the first decoupling structure 130 and the inner edge of the first notch region 111, and a portion of the first decoupling structure 130 is located in the second notch region 121, a third coupling gap 130b is formed between the second decoupling structure and the inner edge of the second notch region 121. In this way, the first decoupling structure 130 couples the third coupling current A3 from the first radiator 110 through the second coupling gap 130a, and couples the third coupling current A3 to the second radiator 120 through the third coupling gap 130b, so that the third coupling current A3 coupled to the second radiator 120 and the first coupling current A1 at least partially cancel each other. And the first decoupling structure 130 couples the fourth coupling current from the second radiator 120 through the third coupling gap 130b and couples the fourth coupling current to the first radiator 110 through the second coupling gap 130a such that the fourth coupling current coupled to the first radiator 110 and the second coupling current A2 at least partially cancel each other.

Or in other embodiments, as shown in fig. 43, the first decoupling structure 130 may be stacked and spaced apart from the first radiator 110 and the second radiator 120 in the thickness direction L1 of the first substrate, in which case a second coupling gap 130a may be formed between the first decoupling structure 130 and the first radiator 110 in the thickness direction L1 of the first substrate, and a third coupling gap 130b may be formed between the first decoupling structure 130 and the second radiator 120 in the thickness direction L1 of the first substrate.

By designing the first decoupling structure 130 to be laminated with and spaced apart from the first and second radiators 110 and 120 in the thickness direction L1 of the first substrate, a second coupling gap 130a is formed between the first decoupling structure 130 and the first radiator 110 in the thickness direction L1 of the first substrate, and a third coupling gap 130b is formed between the first decoupling structure 130 and the second radiator 120 in the thickness direction L1 of the first substrate, such that the first decoupling structure 130 couples the third coupling current A3 from the first radiator 110 through the second coupling gap 130a and couples the third coupling current A3 to the second radiator 120 through the third coupling gap 130b such that the third coupling current A3 coupled to the second radiator 120 and the first coupling current A1 at least partially cancel each other. Also, the first decoupling structure 130 couples the fourth coupling current from the second radiator 120 through the third coupling gap 130b and couples the fourth coupling current to the first radiator 110 through the second coupling gap 130a such that the fourth coupling current coupled to the first radiator 110 and the second coupling current A2 at least partially cancel each other.

As shown in fig. 43, in an embodiment of the present application, the antenna apparatus 100 may further include: the second substrate 100b and the first substrate 100a, the second substrate 100b and the first substrate 100a are stacked, the first radiator 110 and the second radiator 120 are located between the first substrate 100a and the second substrate 100b, and the first decoupling structure 130 is located on a surface of the second substrate 100b facing away from the first radiator 110 and the second radiator 120.

By providing the second substrate 100b on the side of the first and second radiators 110 and 120 facing away from the first substrate 100a and providing the first decoupling structure 130 on the side of the second substrate 100b facing away from the first and second radiators 110 and 120, it is possible to ensure that the first decoupling structure 130 is laminated and spaced apart from the first and second radiators 110 and 120 in the thickness direction L1 of the first substrate.

It can be appreciated that the first decoupling structure 130 and the first radiator 110 and the second radiator 120 are disposed on different layer planes or the same layer plane, which can increase the overall design freedom of the multiple antennas.

In an exemplary practical application scenario, as can be seen from comparing fig. 44 to 46 and fig. 47 to 49, the first radiator 110 and the second radiator 120 are configured on different layers, and the isolation of the dual antenna in the same frequency band is still greater than 17dB.

Further, in the embodiment of the present application, as shown in fig. 13, the projection areas of the first and second radiators 110 and 120 on the first substrate 100a may be (0.28λ×0.37λ) mm, or as shown in fig. 50, the projection areas of the first and second radiators 110 and 120 on the first substrate 100a may be (0.28λ×0.67λ) mm, where λ may be a wavelength corresponding to a center frequency point of the resonant frequency.

It should be noted that, the projection areas of the first radiator 110 and the second radiator 120 on the first substrate 100a may be flexibly set according to the requirements of the actual application scenario, for example, may be set according to the actual antenna form and frequency, which is not limited in the embodiment of the present application.

By increasing the projected areas of the first and second radiators 110 and 120 on the first substrate 100a, two antenna modes, i.e., a Common Mode (CM) antenna mode and a Differential Mode (DM) antenna mode, can be excited simultaneously to realize a dual resonance mode of the antenna device 100. For example, in fig. 51, taking the first radiator 110 as an example, by increasing the projection lengths of the first radiator 110 and the second radiator 120 on the first substrate 100a, the first radiator 110 can generate not only a unidirectional current as indicated by a solid arrow in the drawing, but also a bidirectional current as indicated by a broken arrow in the drawing.

Specifically, in one scenario, referring to fig. 50 and 51, the size of the ground plate 140c is 150×75mm2, the antenna device 100 is an inverted-F patch dual antenna, the total size of the first radiator 110 and the second radiator 120 is 37×87mm ², and at this time, the two modes of excitation of the first radiator 110 and the second radiator 120 are a Common Mode (CM) mode and a Differential Mode (DM) mode. The first radiator 110 and the second radiator 120 have a height of 2mm from the ground plate 140c, the first coupling gap 110a has a width of 5mm, a 0.5-wavelength T-shaped resonant structure (i.e., the first decoupling structure 130) is coupled in the first coupling gap 110a, the first decoupling structure 130 has a length of 23.4mm, and the first decoupling structure 130 has a width of 2mm. The first decoupling structure 130 has a second coupling gap 130a and a third coupling gap 130b between the first radiator 110 and the second radiator 120, respectively. With the above-described arrangements, near-field current coupling between the first radiator 110 and the second radiator 120 can be reduced, and thus isolation between the first radiator 110 and the second radiator 120 can be improved.

Fig. 52 shows the S-parameter results of the first and second radiators 110 and 120 in the frequency band, and it can be seen that the first and second radiators 110 and 120 can operate in the frequency band ranging from 2.29GHz to 2.5GHz, and the isolation is greater than 14.4dB in the frequency band. Fig. 53 shows the efficiency of the first radiator 110 and the second radiator 120 in the frequency band, and fig. 54 shows the packet correlation coefficient (ECC) performance of the first radiator 110 and the second radiator 120. As can be seen from the figure, the system efficiency of the first radiator 110 and the second radiator 120 in the frequency band of 2.25 GHz-2.52 GHz can substantially meet-2.65 dB, and the ECC is smaller than 0.1 in the frequency band, and the experimental result proves that the antenna device 100 is suitable for being applied to MIMO system operation.

In addition, fig. 55 shows the S parameter after the first decoupling structure 130 is added or not to the antenna device, and the result in the figure shows that when the antenna device is not added to the first decoupling structure 130, the isolation in the frequency band of 2.29GHz to 2.5GHz is poor, and the isolation in the frequency band is only greater than 5.7dB. When the first decoupling structure 130 is coupled in the antenna device, a high point of isolation can be generated in the design band, and the isolation in the design band can be improved from 5.7dB to 16dB.

Fig. 56 and 57 are graphs showing current distribution on the radiator and the ground plate 140c without adding the first decoupling structure 130 to the antenna device. Fig. 58 and 59 are graphs showing current distribution of the antenna device added with the first decoupling structure 130 for the radiator and the ground plate 140 c. In the drawings, when the first radiator 110 is excited and the second radiator 120 is connected to the 50 ohm connection line, when the antenna device does not incorporate the first decoupling structure 130, the current with a stronger ground plane surface is led to the second radiator 120 when the first radiator 110 is excited. That is, the two feed points of the first radiator 110 and the second radiator 120 have strong current coupling, so that the near field isolation characteristics of the first radiator 110 and the second radiator 120 are degraded.

Fig. 60-63 illustrate the variation of the surface current by adding the first decoupling structure 130 to the inverted-F dual antenna. Fig. 60 and 61 are cases where the first radiator 110 is excited and the second radiator 120 is connected to a 50 ohm connection line. Fig. 62 and 63 illustrate the case where the second radiator 120 is excited and the first radiator 110 is connected to a 50 ohm connection line. Fig. 64 to 67 are diagrams showing changes of the CM/DM mode dual antenna coupling connection first decoupling structure 130 of the inverted F shape with respect to the high frequency current distribution. It follows that in CM/DM dual resonance mode, isolation characteristics in the broadband band can be improved by embedding the first decoupling structure 130 between the first radiator 110 and the second radiator 120 as well.

In addition, in the embodiment of the present application, as shown in fig. 68 and 69, the first radiator 110 may be provided with a first opening 113, the first ground wall 140a is located in the first opening 113, and a first capacitor 1131 is connected between the first ground wall 140a and an inner wall of the first opening 113. The second radiator 120 may be provided with a second opening 123, the second ground wall 140b is located in the second opening 123, and a second capacitor 1231 is connected between the second ground wall 140b and an inner wall of the second opening 123. Wherein the extending direction of the first opening 113 and the extending direction of the second opening 123 are the same as the extending direction of the first coupling gap 110 a. At this time, the first and second feeding points 150a and 150b are located at the sides of the first and second ground walls 140a and 140b near the first coupling gap 110a, contributing to a compact distribution of the feeding points.

In another scenario, referring to fig. 68 and 69, the size of the ground plate 140c is 150×75mm ², the antenna device 100 is an inverted-F patch dual antenna, the total size of the first radiator 110 and the second radiator 120 is 37×74mm ², and at this time, the two modes of excitation of the first radiator 110 and the second radiator 120 are a Common Mode (CM) mode and a Differential Mode (DM) mode. The first radiator 110 and the second radiator 120 have a height of 2mm from the ground plate 140c, the first coupling gap 110a has a width of 4.5mm, the first decoupling structure 130 is coupled in the first coupling gap 110a, the first decoupling structure 130 has a length of 23.4mm, and the first decoupling structure 130 has a width of 2mm. The first decoupling structure 130 has a second coupling gap 130a and a third coupling gap 130b between the first radiator 110 and the second radiator 120, respectively. With the above-described arrangements, near-field current coupling between the first radiator 110 and the second radiator 120 can be reduced, and thus isolation between the first radiator 110 and the second radiator 120 can be improved.

Fig. 70 shows the S-parameter results of the first and second radiators 110 and 120 in the frequency band, and it can be seen that the first and second radiators 110 and 120 can operate in the frequency band ranging from 3.02GHz to 3.22GHz, and the isolation is greater than 12.3dB in the frequency band. Fig. 71 shows the efficiency of the first radiator 110 and the second radiator 120 in the frequency band, and fig. 72 shows the packet correlation coefficient (ECC) performance of the first radiator 110 and the second radiator 120. As can be seen from the figure, the system efficiency of the first radiator 110 and the second radiator 120 in the frequency band of 3.01 GHz-3.27 GHz can approximately meet-2.87 dB, and the ECC is smaller than 0.1 in the frequency band, and the experimental result proves that the antenna device 100 is suitable for being applied to MIMO system operation.

In addition, fig. 73 shows the S parameter after the first decoupling structure 130 is added or not to the antenna device, and the results in the figure show that the isolation on both sides of the frequency band is poor although there is one high isolation point in the frequency band when the antenna device is not added to the first decoupling structure 130. When the first decoupling structure 130 is coupled in the antenna device, one more high point of isolation can be generated in the design frequency band, and the isolation in the design frequency band can be improved from 1.5dB to 4dB.

Fig. 74 to 77 are graphs showing changes of the low frequency current distribution by the T-shaped inverted F-shaped CM/DM dual antenna added T-shaped first decoupling structure 130. Fig. 78 and 79 are current distribution diagrams of the antenna device without the first decoupling structure 130 on the radiator and the ground plate 140 c. Fig. 80 and 81 show current distribution diagrams of the antenna device added with the first decoupling structure 130 for the radiator and the ground plate 140 c. In the drawings, when the first radiator 110 is excited and the second radiator 120 is connected to the 50 ohm connection line, when the antenna device does not incorporate the first decoupling structure 130, the current with a stronger ground plane surface is led to the second radiator 120 when the first radiator 110 is excited. That is, the two feed points of the first radiator 110 and the second radiator 120 have strong current coupling, so that the near field isolation characteristics of the first radiator 110 and the second radiator 120 are degraded.

Fig. 82-85 show the variation of the surface current for the addition of the first decoupling structure 130 to the inverted-F dual antenna. Fig. 82 and 83 are cases where the first radiator 110 is excited and the second radiator 120 is connected to a 50 ohm connection line. Fig. 84 and 85 are cases where the second radiator 120 is excited and the first radiator 110 is connected to a 50 ohm connection line. As can be seen from the figure, the isolation characteristic in the broadband can be improved by embedding the first decoupling structure 130 between the first radiator 110 and the second radiator 120.

Specifically, in some embodiments, referring to fig. 11, the first and second feeding points 150a and 150b may be symmetrically disposed along the extension direction of the first coupling gap 110 a. Alternatively, in some other embodiments, referring to fig. 86, the first feeding point 150a and the second feeding point 150b may be disposed in a staggered manner along the extending direction of the first coupling gap 110a, and at this time, referring to fig. 87 to 89, the antenna device 100 still has good antenna performance.

That is, the first feeding point 150a and the second feeding point 150b are disposed on a plane of symmetry or a plane of asymmetry, and the antenna device 100 can improve isolation in the frequency band by incorporating the first decoupling structure 130, thereby increasing the overall design freedom of the multiple antennas.

It is to be understood that, in the embodiment of the present application, the first feeding point 150a and the second feeding point 150b may be metal shrapnel, probes, or conductive cables, so that the first radiator 110 and the second radiator 120 may be fed through the metal shrapnel, the probes, or the conductive cables. The specific forming manner of the first feeding point 150a and the second feeding point 150b is not limited to the above example, and the embodiment of the present application is not limited to the above example as long as the feeding connection function is achieved.

In addition, in the embodiment of the present application, the number of the first feeding points 150a and the second feeding points 150b corresponding to the first radiator 110 and the second radiator 120 may be one, two, three or more, respectively.

That is, the first radiator 110 may be fed through one first feeding point 150a, or the first radiator 110 may be fed through two first feeding points 150a at the same time, or the first radiator 110 may be fed through three first feeding points 150a at the same time, or the first radiator 110 may be fed through more first feeding points 150a at the same time, which is not limited in the embodiment of the present application. Also, the second radiator 120 may be fed through one second feeding point 150b, or the second radiator 120 may be fed through two second feeding points 150b at the same time, or the second radiator 120 may be fed through three second feeding points 150b at the same time, or the second radiator 120 may be fed through more second feeding points 150b at the same time, which is not limited in the embodiment of the present application.

In addition, the antenna device 100 may have a structure as shown in fig. 90, and in fig. 90, the first decoupling structure 130 is not disposed at the center of the first radiator 110 and the second radiator 120, and in this case, the antenna device 100 still has good antenna performance, as shown in fig. 91 to 93.

The antenna device 100 may also have a structure as shown in fig. 94 and 98, and in fig. 94 and 98, the first decoupling structure 130 is designed in a two-dimensional plane, and in this case, as shown in fig. 95 to 97 and fig. 99 to 101, the antenna device 100 still has good antenna performance. That is, the first decoupling structure 130 is a one-dimensional design or a two-dimensional planar design, and the antenna device 100 can improve the isolation in the frequency band by embedding the first decoupling structure 130, so as to increase the overall design freedom of the multiple antennas.

The antenna device 100 may also have a structure as shown in fig. 102, in which fig. 102, the first decoupling structure 130 is a DM resonant structure, and in this case, as shown in fig. 103 to 105, the antenna device 100 still has good antenna performance. That is, the first decoupling structure 130 is a DM resonant structure or a CM resonant structure, and the antenna device 100 can improve isolation in a frequency band by incorporating the first decoupling structure 130, so as to increase the overall design freedom of the multiple antennas.

In an embodiment of the present application, the antenna apparatus 100 may further include: a third radiator 160 and a second decoupling structure 170, wherein the third radiator 160 is disposed on the first substrate 100a, the second radiator 120 is located between the first radiator 110 and the third radiator 160, and a fourth coupling gap 160a may be provided between the second radiator 120 and the third radiator 160.

At least a portion of the orthographic projection of the second decoupling structure 170 toward the first substrate 100a is located within the fourth coupling gap 160a, and a fifth coupling gap 170a and a sixth coupling gap 170b are formed between the second decoupling structure 170 and the second and third radiators 120 and 160, respectively.

The second radiator 120 is coupled to the third radiator 160 through a fourth coupling gap 160a to form a fifth coupling current (not shown), the third radiator 160 is coupled to the second radiator 120 through the fourth coupling gap 160a to form a sixth coupling current (not shown), the second decoupling structure 170 is configured to couple from the second radiator 120 through the fifth coupling gap 170a to form a seventh coupling current (not shown), and couple the seventh coupling current to the third radiator 160 through the sixth coupling gap 170b such that the seventh coupling current coupled to the third radiator 160 is at least partially cancelled by the fifth coupling current, and the second decoupling structure 170 is further configured to couple from the third radiator 160 through the sixth coupling gap 170b to form an eighth coupling current (not shown), and couple the eighth coupling current to the second radiator 120 through the fifth coupling gap 170a such that the eighth coupling current coupled to the second radiator 120 is at least partially cancelled by the sixth coupling current.

By providing the second decoupling structure 170, the second decoupling structure 170 is designed such that at least part of the orthographic projection towards the first substrate 100a is located within the fourth coupling gap 160a, i.e. the second decoupling structure 170 is arranged within the second radiator 120 and the third radiator 160, and a fifth coupling gap 170a is formed between the second decoupling structure 170 and the second radiator 120, and a sixth coupling gap 170b is formed between the second decoupling structure 170 and the third radiator 160.

The second radiator 120 is coupled to the third radiator 160 through the fourth coupling gap 160a to form a fifth coupling current, the second decoupling structure 170 is coupled from the second radiator 120 through the fifth coupling gap 170a to form a seventh coupling current, and the seventh coupling current is coupled to the third radiator 160 through the sixth coupling gap 170b such that the seventh coupling current and the fifth coupling current coupled to the third radiator 160 at least partially cancel each other. The third radiator 160 is coupled to the second radiator 120 through the fourth coupling gap 160a to form a sixth coupling current, the second decoupling structure 170 is coupled from the third radiator 160 through the sixth coupling gap 170b to form an eighth coupling current, and the eighth coupling current is coupled to the second radiator 120 through the fifth coupling gap 170a such that the eighth coupling current and the sixth coupling current coupled to the second radiator 120 at least partially cancel each other.

In this way, the seventh coupling current formed by the second decoupling structure 170 and the fifth coupling current formed by coupling the second radiator 120 to the third radiator 160 can cancel each other, and the eighth coupling current formed by coupling the second decoupling structure 170 and the sixth coupling current formed by coupling the third radiator 160 to the second radiator 120 can cancel each other, so that the embodiment of the application not only can reduce the overall design size of the antenna apparatus 100, reduce the occupied space of the antenna apparatus 100 in the electronic device, avoid affecting the impedance matching and radiation characteristics of other antennas and avoiding interfering or affecting the layout of other devices in the electronic device, but also can effectively reduce the current coupling between the second radiator 120 and the third radiator 160, that is, effectively improve the isolation between the second radiator 120 and the third radiator 160, thereby further improving the antenna efficiency of the antenna apparatus 100.

In an embodiment of the present application, referring to fig. 106, the antenna apparatus 100 may further include: the third decoupling structure 190 and the fourth radiator 180, wherein the fourth radiator 180 is disposed on the first substrate 100a, the third radiator 160 is located between the second radiator 120 and the fourth radiator 180, and a seventh coupling gap 180a is located between the fourth radiator 180 and the third radiator 160, at least a portion of an orthographic projection of the third decoupling structure 190 toward the first substrate 100a is located in the seventh coupling gap 180a, and an eighth coupling gap 190a and a ninth coupling gap 190b are formed between the third decoupling structure 190 and the third radiator 160 and the fourth radiator 180, respectively.

The third radiator 160 is coupled to the third radiator 160 through a seventh coupling gap 180a to form a ninth coupling current (not shown), and the fourth radiator 180 is coupled to the third radiator 160 through the seventh coupling gap 180a to form a tenth coupling current (not shown). The third decoupling structure 190 is configured to couple an eleventh coupling current (not shown) from the third radiator 160 through the eighth coupling gap 190a and couple the eleventh coupling current to the fourth radiator 180 through the ninth coupling gap 190b such that the eleventh coupling current coupled to the fourth radiator 180 is at least partially cancelled by the ninth coupling current, and the third decoupling structure 190 is further configured to couple a twelfth coupling current (not shown) from the fourth radiator 180 through the ninth coupling gap 190b and couple the twelfth coupling current to the third radiator 160 through the eighth coupling gap 190a such that the twelfth coupling current coupled to the third radiator 160 is at least partially cancelled by the tenth coupling current.

By providing the third decoupling structure 190, the third decoupling structure 190 is designed such that at least part of the orthographic projection towards the first substrate 100a is located within the seventh coupling gap 180a, i.e. the third decoupling structure 190 is arranged within the third and fourth radiators 160, 180, and an eighth coupling gap 190a is formed between the third decoupling structure 190 and the third radiator 160, and a ninth coupling gap 190b is formed between the third decoupling structure 190 and the fourth radiator 180.

The third radiator 160 is coupled to the fourth radiator 180 through the seventh coupling gap 180a to form a ninth coupling current, the third decoupling structure 190 is coupled from the fourth radiator 180 through the eighth coupling gap 190a to form an eleventh coupling current, and the eleventh coupling current is coupled to the fourth radiator 180 through the ninth coupling gap 190b such that the eleventh coupling current and the ninth coupling current coupled to the fourth radiator 180 at least partially cancel each other. The fourth radiator 180 is coupled to the third radiator 160 through the seventh coupling gap 180a to form a tenth coupling current, the third decoupling structure 190 is coupled from the third radiator 160 through the ninth coupling gap 190b to form a twelfth coupling current, and the twelfth coupling current is coupled to the third radiator 160 through the eighth coupling gap 190a such that the twelfth coupling current and the tenth coupling current coupled to the third radiator 160 at least partially cancel each other.

In this way, the eleventh coupling current formed by the third decoupling structure 190 and the ninth coupling current formed by the third radiator 160 coupling to the fourth radiator 180 can cancel each other, and the twelfth coupling current formed by the third decoupling structure 190 and the tenth coupling current formed by the fourth radiator 180 coupling to the third radiator 160 cancel each other, so that the embodiment of the application not only can reduce the overall design size of the antenna apparatus 100, reduce the occupied space of the antenna apparatus 100 in the electronic device, avoid affecting the impedance matching and radiation characteristics of other antennas and avoiding interfering or affecting the layout of other devices in the electronic device, but also can effectively reduce the current coupling between the third radiator 160 and the fourth radiator 180, that is, effectively improve the isolation between the third radiator 160 and the fourth radiator 180, thereby further improving the antenna efficiency of the antenna apparatus 100.

Specifically, in one embodiment, referring to fig. 107 and 108, fig. 107 and 108 are performance results of an inverted-F CM/DM four antenna having a T-shaped first decoupling structure 130, a second decoupling structure 170, and a third decoupling structure 190, the isolation of the first, second, third, and fourth radiators 110, 120, 160, 180 in a compact arrangement is greater than 12.2dB in the broadband band, and the antenna radiation efficiency is greater than-2.8 dB.

It is understood that in the embodiment of the present application, the number of radiators in the antenna device 100 may be more. In the electronic device provided by the embodiment of the application, through the increase of the number of the radiators, a plurality of radiators in the electronic device can realize coverage of more antenna modes. When the plurality of radiators are in close proximity, the plurality of decoupling structures are coupled between the plurality of radiators, so that the isolation of the antenna device 100 can be greatly improved in the operating frequency band, and the antenna efficiency is further improved, so as to achieve good MIMO performance.

For example, the antenna device 100 may further include a fifth radiator, a sixth radiator, a seventh radiator, and an eighth radiator, and the like, and in this case, the antenna device 100 may include a fourth decoupling structure between the fourth radiator and the fifth radiator, a fifth decoupling structure between the fifth radiator and the sixth radiator, a sixth decoupling structure between the sixth radiator and the seventh radiator, and a seventh decoupling structure between the seventh radiator and the eighth radiator, and the like, which are not limited thereto, and the embodiment of the present application is not limited thereto.

In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The embodiments of the application may be implemented or realized in any number of ways, including as a matter of course, such that the apparatus or elements recited in the claims are not necessarily oriented or configured to operate in any particular manner. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless specifically stated otherwise.

The terms first, second, third, fourth and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "may include" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the foregoing embodiments are merely for illustrating the technical solution of the embodiments of the present application, and are not limited thereto, and although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical schemes described in the foregoing embodiments may be modified or some or all of the technical features may be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical schemes deviate from the scope of the technical schemes of the embodiments of the present application.

Claims

1. An antenna device, characterized in that the antenna device comprises:

a first radiator and a second radiator provided on the first substrate with a first coupling gap therebetween;

Further comprises: a first decoupling structure; at least part of the orthographic projection of the first decoupling structure towards the first substrate is positioned in the first coupling gap, and a second coupling gap and a third coupling gap are respectively formed between the first decoupling structure and the first radiator and between the first decoupling structure and the second radiator;

The first decoupling structure is used for coupling a third coupling current from the first radiator through the second coupling gap and coupling the third coupling current to the second radiator through the third coupling gap so that the third coupling current coupled to the second radiator at least partially counteracts the first coupling current;

And the third coupling gap is further used for coupling a fourth coupling current from the second radiator through the third coupling gap, and coupling the fourth coupling current to the first radiator through the second coupling gap so that the fourth coupling current coupled to the first radiator and the second coupling current at least partially cancel.

2. The antenna device according to claim 1, wherein an outer edge of a side of the first radiator facing the first coupling gap has a first notch area, and the first notch area communicates with the first coupling gap;

the portion of the first decoupling structure, which faces the orthographic projection of the substrate, is located in the first notch area.

3. The antenna device according to claim 2, wherein a second notch area is provided on an outer edge of the second radiator facing the first coupling gap, the second notch area being in communication with the first coupling gap;

the portion of the first decoupling structure, which faces the orthographic projection of the substrate, is located in the second notch area.

4. An antenna arrangement according to claim 3, characterized in that the first decoupling structure is located on the same plane as the first radiator and the second radiator;

Forming a second coupling gap between a part of the first decoupling structure located in the first notch area and the inner edge of the first notch area;

The third coupling gap is formed between the part of the first decoupling structure located in the second notch area and the inner edge of the second notch area.

5. An antenna device according to any one of claims 1-3, wherein said first decoupling structure is laminated with and spaced apart from said first radiator and said second radiator in a thickness direction of said first substrate;

The second coupling gap is formed between the first decoupling structure and the first radiator in the thickness direction of the first substrate, and the third coupling gap is formed between the first decoupling structure and the second radiator in the thickness direction of the first substrate.

6. The antenna device of claim 5, further comprising: a second substrate and the first substrate; the second substrate is stacked with the first substrate, and the first radiator and the second radiator are positioned between the first substrate and the second substrate;

And the first decoupling structure is positioned on one surface of the second substrate away from the first radiator and the second radiator.

7. The antenna device according to any one of claims 1-6, further comprising: a first ground wall; the first grounding wall is located in the first substrate, one end of the first grounding wall is connected with one of the first radiator and the second radiator, and the other end of the first grounding wall is used for grounding.

8. The antenna device of claim 7, further comprising: a second ground wall; the second grounding wall is located in the first substrate, one end of the second grounding wall is connected with the other one of the first radiator and the second radiator, and the other end of the second grounding wall is used for grounding.

9. The antenna device of claim 8, further comprising: at least one grounding point arranged on the grounding plate; the other end of the first grounding wall and the other end of the second grounding wall are connected with the grounding point.

10. The antenna device according to claim 8 or 9, wherein a first opening is formed in the first radiator, the first ground wall is located in the first opening, and a first capacitor is connected between the first ground wall and an inner wall of the first opening;

A second opening is formed in the second radiator, the second grounding wall is positioned in the second opening, and a second capacitor is connected between the second grounding wall and the inner wall of the second opening;

Wherein the extending direction of the first opening and the extending direction of the second opening are the same as the extending direction of the first coupling gap.

11. The antenna device according to any of claims 1-10, wherein said first decoupling structure comprises at least: a first lateral decoupling stub; the extending direction of the first transverse decoupling branch is perpendicular to the extending direction of the first coupling gap.

12. The antenna arrangement of claim 11, wherein the first decoupling structure further comprises: and one end of the first longitudinal decoupling branch is used for grounding.

13. The antenna device of claim 12, wherein the first longitudinal decoupling branch is connected to a middle connection region of the first transverse decoupling branch.

14. The antenna device of claim 13, wherein the middle connection region includes a midpoint of the first lateral decoupling branch.

15. The antenna assembly of claim 14 wherein the central connection region further comprises: a first connection region and a second connection region;

the first connection region is located within a range that a midpoint of the first lateral decoupling stub extends 1mm toward a first end of the first lateral decoupling stub;

the second connection region is located within a range extending 1mm from a midpoint of the first lateral decoupling stub toward a second end of the first lateral decoupling stub.

16. The antenna device according to any one of claims 1-15, further comprising: a first feeding point and a second feeding point;

The first feed point is positioned at one side of the first radiator, which is away from the first coupling gap, and the second feed point is positioned at one side of the second radiator, which is away from the first coupling gap;

the first feeding point feeds the first radiator, and the second feeding point feeds the second radiator.

17. The antenna device according to claim 16, wherein the first feeding point and the second feeding point are symmetrically arranged along an extending direction of the first coupling gap.

18. The antenna device of claim 16, wherein the first and second feed points are disposed in a staggered relative arrangement along the direction of extension of the first coupling gap.

19. The antenna device according to any one of claims 1-18, wherein a first matching circuit is provided on a side of the first radiator facing the first substrate, and the first matching circuit is electrically connected to the first radiator;

A second matching circuit is arranged on one surface of the second radiator facing the first substrate, and the second matching circuit is electrically connected with the second radiator;

The first matching circuit and the second matching circuit are grounded.

20. The antenna device of claim 19, wherein the first matching circuit comprises any one or more of a capacitance, an inductance, and a resistance;

The second matching circuit includes any one or more of a capacitance, an inductance, and a resistance.

21. The antenna device according to any one of claims 1-20, wherein the projected area of the first radiator and the second radiator on the first substrate is (0.28λ 0.37λ) mm;

Wherein lambda is the wavelength corresponding to the center frequency point of the resonant frequency.

22. The antenna device according to any one of claims 1-20, wherein the projected area of the first radiator and the second radiator on the first substrate is (0.28λ 0.67 λ) mm;

23. The antenna device according to any one of claims 1-22, further comprising: a third radiator and a second decoupling structure;

the third radiator is arranged on the first substrate, the second radiator is positioned between the first radiator and the third radiator, and a fourth coupling gap is formed between the second radiator and the third radiator;

At least part of the orthographic projection of the second decoupling structure towards the first substrate is positioned in the fourth coupling gap, and a fifth coupling gap and a sixth coupling gap are respectively formed between the second decoupling structure and the second radiator and between the second decoupling structure and the third radiator;

the second radiator is coupled to the third radiator through the fourth coupling gap to form a fifth coupling current, and the third radiator is coupled to the second radiator through the fourth coupling gap to form a sixth coupling current;

The second decoupling structure is used for coupling a seventh coupling current from the second radiator through the fifth coupling gap and coupling the seventh coupling current to the third radiator through a sixth coupling gap so that the seventh coupling current coupled to the third radiator and the fifth coupling current at least partially cancel;

And the device is further used for forming an eighth coupling current through the sixth coupling gap from the third radiator, and coupling the eighth coupling current to the second radiator through the fifth coupling gap so that the eighth coupling current coupled to the second radiator and the sixth coupling current at least partially cancel.

24. The antenna device of claim 23, further comprising: a third decoupling structure and a fourth radiator;

The fourth radiator is arranged on the first substrate, the third radiator is positioned between the second radiator and the fourth radiator, and a seventh coupling gap is formed between the fourth radiator and the third radiator;

At least part of the orthographic projection of the third decoupling structure towards the first substrate is positioned in the seventh coupling gap, and an eighth coupling gap and a ninth coupling gap are respectively formed between the third decoupling structure and the third radiator and between the third decoupling structure and the fourth radiator;

The third decoupling structure is configured to couple an eleventh coupling current from the third radiator through the eighth coupling gap and couple the eleventh coupling current to the fourth radiator through a ninth coupling gap such that the eleventh coupling current coupled to the fourth radiator at least partially cancels the ninth coupling current;

And the third radiator is further used for forming a twelfth coupling current through the ninth coupling gap from the fourth radiator, and coupling the twelfth coupling current to the third radiator through the eighth coupling gap so that the twelfth coupling current coupled to the third radiator and the tenth coupling current at least partially cancel.

25. An electronic device, comprising at least: display screen, center, battery lid and be located the center with battery between the battery lid still includes: the antenna device of any of the preceding claims 1-24; the first radiator and the second radiator in the antenna device are disposed on one face of the middle frame.