Antenna module and electronic equipment

Abstract

The invention relates to the technical field of electronic equipment, in particular to an antenna module and electronic equipment. The antenna module provided by the invention comprises an antenna unit and an isolation unit, wherein the antenna unit comprises a first antenna and a second antenna which are arranged at an interval; the isolation unit is arranged between the first antenna and the second antenna and is used for isolating a target electromagnetic wave signal between the first antenna and the second antenna; wherein the isolation unit comprises a first branch knot structure arranged on a first plane and a second branch knot structure arranged on a second plane, the first branch knot structure is electrically connected with the second branch knot structure, and the first plane is different from the second plane.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic devices, and particularly to an antenna module and an electronic device. Background Art

[0002] An antenna module is usually provided on an electronic device, and the electronic device can send and receive wireless signals through the antenna module. Limited by the installation space, the distance between adjacent antennas in the antenna module is relatively close, resulting in a decrease in the isolation between the antennas, thereby affecting the performance of the antenna module. Summary of the Invention

[0003] A first aspect of the present disclosure provides an antenna module, including:

[0004] An antenna unit including a first antenna and a second antenna arranged at intervals;

[0005] An isolation unit disposed between the first antenna and the second antenna for isolating a target electromagnetic wave signal between the first antenna and the second antenna;

[0006] Wherein, the isolation unit includes a first branch structure disposed on a first plane and a second branch structure disposed on a second plane, the first branch structure is electrically connected to the second branch structure, and the first plane and the second plane are different.

[0007] In an embodiment of the present application, when the antenna unit is in a working state, the isolation unit can generate a first electromagnetic wave within a target resonance frequency band, and the first electromagnetic wave can be superimposed on a second electromagnetic wave coupled between the first antenna and the second antenna to isolate the target electromagnetic wave signal between the first antenna and the second antenna, and the phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angular range;

[0008] And / or,

[0009] When the antenna unit is in a working state, the isolation unit can generate a characteristic of a negative equivalent dielectric constant within a target resonance frequency band to change the propagation form of at least part of the electromagnetic waves radiated by the first antenna and / or the second antenna into an evanescent wave, so as to isolate the target electromagnetic wave signal between the first antenna and the second antenna.

[0010] In an embodiment of the present application, the isolation unit further includes a first substrate having a thickness, the first substrate includes a first surface and a second surface disposed opposite to each other, the first branch structure is disposed on the first surface, and the second branch structure is disposed on the second surface;

[0011] Wherein, gaps are formed between components of the first branch structure, and at least a portion of a projection of the second branch structure on the first surface can be embedded in the gaps;

[0012] and / or,

[0013] When electric resonance occurs, the first surface and the second surface can be electromagnetically coupled.

[0014] In one embodiment of the present application, the first branch structure is formed by bending and / or splicing at least one section of metal patch along at least two different directions, and the second branch structure is formed by bending and / or splicing at least one section of metal patch along at least two different directions;

[0015] The structural morphologies of the first branch structure and the second branch structure are in a complementary relationship;

[0016] or,

[0017] The projection of the first branch structure or the second branch structure on the surface where the other is located has a target symmetric relationship or a chimeric relationship with the branch structure on the surface.

[0018] In one embodiment of the present application, both the first branch structure and the second branch structure are spiral structures formed by bending a section of metal patch along at least two directions;

[0019] or,

[0020] The first branch structure and the second branch structure are both spiral structures formed by splicing at least two sections of metal patches;

[0021] or,

[0022] The first branch structure and the second branch structure are each formed by splicing at least two sections of metal patches together or by bending at least one section of metal patches to form an S-shaped structure, an L-shaped structure, an I-shaped structure, an F-shaped structure, an E-shaped structure, or a U-shaped structure.

[0023] In one embodiment of the present application, the antenna module includes a plurality of isolation units spaced between the first antenna and the second antenna, and the spacing between two adjacent isolation units is greater than one eighth of the wavelength of the antenna in the working frequency band;

[0024] and / or,

[0025] The isolation unit can isolate at least part of the signal of the first antenna and / or the second antenna in at least one of the 5.15 GHz-5.85 GHz frequency band, the 5.925 GHz-7.125 GHz frequency band, and the 2.4 GHz-2.5 GHz frequency band.

[0026] In an embodiment of the present application, the antenna unit includes a second substrate, a first antenna radiator and a second antenna radiator spaced apart on the second substrate, and a third radiator connecting the first antenna radiator and the second antenna radiator, and the third radiator is grounded;

[0027] Wherein, an interdigital structure is provided between the isolation unit and the third radiator, and the isolation unit is coupled to the third radiator through the interdigital structure to reduce the spatial coupling between the first antenna and the second antenna and the coupling conducted through the third radiator.

[0028] A first aspect of the present disclosure provides an electronic device, including an antenna module, the antenna module includes a first antenna and a second antenna spaced apart, and an isolation unit disposed between the first antenna and the second antenna;

[0029] The isolation unit is configured to isolate a target electromagnetic wave signal between the first antenna and the second antenna;

[0030] Wherein, the isolation unit includes a first stub structure disposed on a first plane and a second stub structure disposed on a second plane, the first stub structure is electrically connected to the second stub structure, and the first plane and the second plane are different.

[0031] In an embodiment of the present application, the electronic device includes a display part composed of a housing and a display screen, the antenna module is disposed in an accommodation space formed by the display part, wherein at least part of the housing forming the accommodation space is made of an insulating material or the accommodation space has an opening;

[0032] And / or,

[0033] When the antenna unit is in a working state, the isolation unit can generate a first electromagnetic wave within a target resonance frequency band, and the first electromagnetic wave can be superimposed on a second electromagnetic wave coupled between the first antenna and the second antenna to isolate the target electromagnetic wave signal between the first antenna and the second antenna, and the phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angular range.

[0034] In an embodiment of the present application, the electronic device includes a first body and a second body and two rotating shafts for realizing the rotational connection between the first body and the second body, and the antenna module is disposed in an accommodation space formed between the two rotating shafts;

[0035] And / or,

[0036] The antenna unit includes a second substrate, a first antenna radiator and a second antenna radiator spaced apart on the second substrate, and a third radiator connecting the first antenna radiator and the second antenna radiator, and the third radiator is grounded;

[0037] Wherein, an interdigital structure is arranged between the isolation unit and the third radiator, and the isolation unit is coupled to the third radiator through the interdigital structure to reduce the spatial coupling between the first antenna and the second antenna and the coupling conducted through the third radiator.

[0038] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become easily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, wherein:

[0040] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0041] Figure 1 A schematic structural diagram of the isolation unit provided by the embodiment of the present disclosure is shown;

[0042] Figure 2a A schematic structural diagram of the first plane in the isolation unit provided by the embodiment of the present disclosure is shown;

[0043] Figure 2b A schematic structural diagram of the second plane in the isolation unit provided by the embodiment of the present disclosure is shown;

[0044] Figure 3 A schematic structural diagram of the antenna module provided by the embodiment of the present disclosure is shown Figure 1 ;

[0045] Figure 4 A second schematic structural diagram of the antenna module provided by the embodiment of the present disclosure is shown;

[0046] Figure 5 A schematic structural diagram of the antenna module provided by the embodiment of the present disclosure is shown Figure 3 ;

[0047] Figure 6 A schematic structural diagram of the antenna module provided by the embodiment of the present disclosure is shown Figure 4 ;

[0048] Figure 7Schematic diagram II of the structure of the first plane in the isolation unit provided by an embodiment of the present disclosure;

[0049] Figure 8 Schematic diagram II of the structure of the second plane in the isolation unit provided by an embodiment of the present disclosure;

[0050] Figure 9 Schematic diagram for comparing the isolation effect of the isolation unit provided by an embodiment of the present disclosure with that of the isolation unit in the prior art.

[0051] Explanation of reference numerals in the figure: 1, first antenna; 11, first antenna radiator; 2, second antenna; 21, second antenna radiator; 3, isolation unit; 31, first surface; 311, first branch structure; 3111, first sub-branch; 3112, second sub-branch; 3113, third sub-branch; 3114, fourth sub-branch; 3115, fifth sub-branch; 3116, sixth sub-branch; 3117, seventh sub-branch; 3118, eighth sub-branch; 32, second surface; 321, second branch structure; 3211, first branch part; 3212, second branch part; 3213, third branch part; 3214, fourth branch part; 3215, fifth branch part; 3216, sixth branch part; 33, first interdigital part; 34, connecting part; 4, third radiator; 41, second interdigital part. Detailed implementation manners

[0052] To make the objectives, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0053] An antenna module is usually provided on an electronic device, and the electronic device can send and receive wireless signals through the antenna module. Due to the limited installation space, the distance between adjacent antennas in the antenna module is relatively close, resulting in a decrease in the isolation between the antennas, thereby affecting the performance of the antenna module.

[0054] The electronic device mentioned in the embodiments of the present application can be a laptop computer, a tablet, a mobile phone, or a computer host such as an all-in-one computer, etc., which is not limited herein.

[0055] Combined with Figure 1 、 Figure 2a 、 Figure 2b and Figure 3As shown in the figure, the antenna module provided by the embodiment of the present disclosure includes an antenna unit and an isolation unit 3. The antenna unit includes a first antenna 1 and a second antenna 2 which are arranged at intervals. Optionally, the first antenna 1 can be used as a transmitting antenna, and the second antenna 2 can be used as a receiving antenna, or both the first antenna 1 and the second antenna 2 are used to transmit electromagnetic wave signals outward or are used to receive electromagnetic wave signals in the surrounding space environment; if the second antenna 2 receives less signals transmitted by the first antenna 1, then the isolation degree between the first antenna 1 and the second antenna 2 is better, and the degree of interference is lower. Optionally, the first antenna 1 can be the main antenna, and the second antenna 2 can be the auxiliary antenna; or, the first antenna 1 can be the auxiliary antenna, and the second antenna 2 can be the main antenna. The main antenna is mainly used to receive and transmit main radio signals, so its performance is crucial for the quality of network connection; the auxiliary antenna is used to assist the main antenna to improve the stability and reliability of network connection. Optionally, the first antenna 1 and the second antenna 2 can be the main and auxiliary antennas of WiFi respectively, or the main and auxiliary antennas of other wireless communication modules (mobile communication modules). The types of the first antenna 1 and the second antenna 2 are not limited. For example, the first antenna 1 can be a PIFA antenna (Planar Inverted F-shaped Antenna) or other types of antennas. Similarly, the second antenna 2 can be a PIFA antenna or other types of antennas. When both the first antenna 1 and the second antenna 2 adopt PIFA antennas, their F orientations can be opposite.

[0056] The isolation unit 3 is arranged between the first antenna 1 and the second antenna 2 and is used to isolate the target electromagnetic wave signals between the first antenna 1 and the second antenna 2. The target electromagnetic wave signals can be electromagnetic wave signals of a specific frequency band, such as high-frequency signals or low-frequency signals, etc.

[0057] The isolation unit 3 includes a first branch structure 311 arranged on a first plane and a second branch structure 321 arranged on a second plane. The first branch structure 311 is electrically connected to the second branch structure 321, and the first branch structure 311 and the second branch structure 321 can be electrically connected at the connection part 34. The first plane and the second plane are different, so that the isolation unit 3 can form a three-dimensional structure, which can reduce the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, so that the isolation degree between the first antenna 1 and the second antenna 2 can be improved, thereby improving the performance of the antenna module. The first branch structure 311 arranged on the first plane and the second branch structure 321 arranged on the second plane can form an integrated three-dimensional structure, making the structure of the antenna module more compact and with higher integration, which is conducive to the miniaturization and thinning design of electronic devices.

[0058] In a specific embodiment of the present application, such as Figure 1The isolation unit 3 shown includes a first surface 31 and a second surface 32 facing away from each other. The first surface 31 and the second surface 32 can be the upper surface and the lower surface of the isolation unit 3 respectively. The first surface 31 is provided with a first stub structure 311, and the second surface 32 is provided with a second stub structure 321. The first stub structure 311 and the second stub structure 321 are complementary structures, and there is an electrical connection between them. In this way, there is coupling between the two surfaces of the first surface 31 and the second surface 32, which can not only expand the working bandwidth but also greatly reduce the size of the resonator unit. Refer to Figure 2a , when the first plane is the first surface 31, Figure 2a is a schematic structural diagram of the first surface 31; Refer to Figure 2b , when the second plane is the second surface 32, Figure 2b is a schematic structural diagram of the second surface 32. The first stub structure 311 and the second stub structure 321 are complementary in structure, and the overall unit size can be reduced by more than 30%. Optionally, the isolation unit 3 can be an electromagnetic metamaterial resonator unit. Optionally, the electromagnetic metamaterial resonator unit is separated from the radiators and ground planes of the two antennas, and there is no decoupling circuit with electrical connection. Optionally, the electromagnetic metamaterial resonator unit and the ground planes of the two antennas increase the coupling through an interdigital structure, which can not only suppress the conductive coupling on the floor but also greatly reduce the size of the resonator unit.

[0059] The first branch structure 311 may include a first sub-branch 3111 and a second sub-branch 3112, and the first sub-branch 3111 and the second sub-branch 3112 are connected end to end. Optionally, the first sub-branch 3111 may be vertical, and the second sub-branch 3112 may be horizontal. The first branch structure 311 may further include a third sub-branch 3113, and the head of the third sub-branch 3113 is connected to the tail of the second sub-branch 3112. Optionally, the third sub-branch 3113 may be vertical. The first branch structure 311 may further include a fourth sub-branch 3114, and the head of the fourth sub-branch 3114 is connected to the tail of the third sub-branch 3113. Optionally, the fourth sub-branch 3114 may be horizontal. The first branch structure 311 may further include a fifth sub-branch 3115, and the head of the fifth sub-branch 3115 is connected to the tail of the fourth sub-branch 3114. Optionally, the fifth sub-branch 3115 may be vertical. The first branch structure 311 may further include a sixth sub-branch 3116, and the head of the sixth sub-branch 3116 is connected to the tail of the fifth sub-branch 3115. Optionally, the sixth sub-branch 3116 may be horizontal. The first branch structure 311 may further include a seventh sub-branch 3117, and the head of the seventh sub-branch 3117 is connected to the tail of the sixth sub-branch 3116. Optionally, the seventh sub-branch 3117 may be vertical. The first branch structure 311 may further include an eighth sub-branch 3118, and the head of the eighth sub-branch 3118 is connected to the tail of the seventh sub-branch 3117. Optionally, the eighth sub-branch 3118 may be horizontal.

[0060] The second branch structure 321 may include a first branch portion 3211 and a second branch portion 3212, and the first branch portion 3211 and the second branch portion 3212 are connected end to end. Optionally, the first branch portion 3211 may be vertical, and the second branch portion 3212 may be horizontal. The second branch structure 321 may further include a third branch portion 3213, and the head of the third branch portion 3213 is connected to the tail of the second sub-branch. Optionally, the third branch portion 3213 is vertical. The second branch structure 321 may further include a fourth branch portion 3214, and the head of the fourth branch portion 3214 is connected to the tail of the third branch portion 3213. Optionally, the fourth branch portion 3214 may be horizontal. The second branch structure 321 may further include a fifth branch portion 3215, and the head of the fifth branch portion 3215 is connected to the tail of the fourth branch portion 3214. Optionally, the fifth sub-branch 3115 may be vertical. The second branch structure 321 may further include a sixth branch portion 3216, and the head of the sixth sub-branch 3116 is connected to the tail of the fifth branch portion 3215. Optionally, the sixth branch portion 3216 may be horizontal.

[0061] Optionally, the sixth branch portion 3216 is electrically connected to the eighth sub-branch 3118.

[0062] Optionally, the projection of the third branch portion 3213 along the vertical direction of the second surface is located in the gap formed between the fifth sub-branch 3115 and the first sub-branch 3111; the projection of the fourth branch portion 3214 along the vertical direction of the second surface is located in the gap formed between the second sub-branch 3112 and the sixth sub-branch 3116; the projection of the fifth branch portion 3215 along the vertical direction of the second surface is located in the gap formed between the third sub-branch 3113 and the seventh sub-branch 3117; the projection of the sixth branch portion 3216 along the vertical direction of the second surface is located in the gap formed between the fourth sub-branch 3114 and the eighth sub-branch 3118.

[0063] In a specific embodiment of the present application, the antenna module includes an antenna unit and an isolation unit 3. The antenna unit includes a first antenna 1 and a second antenna 2 which are arranged at intervals. The isolation unit 3 is arranged between the first antenna 1 and the second antenna 2 and is used for isolating the target electromagnetic wave signal between the first antenna 1 and the second antenna 2. The isolation unit 3 includes a first branch structure 311 arranged on a first plane and a second branch structure 321 arranged on a second plane. The first branch structure 311 is electrically connected to the second branch structure 321, and the first plane and the second plane are different. On the one hand, it can make the isolation unit 3 form a three-dimensional structure, reduce the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, so that the isolation degree between the first antenna 1 and the second antenna 2 can be improved. On the other hand, it can make the isolation unit 3 form an integrated three-dimensional structure, make the structure of the antenna module more compact and have a higher integration degree, which is beneficial to the miniaturization and thin and light design of electronic devices. When the antenna unit is in the working state, the isolation unit 3 can generate a first electromagnetic wave in the target resonance frequency band. The first electromagnetic wave can be superimposed on the second electromagnetic wave coupled between the first antenna 1 and the second antenna 2 to isolate the target electromagnetic wave signal between the first antenna 1 and the second antenna 2. The phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angle range, so that the first electromagnetic wave cancels the second electromagnetic wave, reducing the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, thereby improving the performance of the antenna module.

[0064] Among them, the antenna unit being in the working state can be that at least one of the first antenna 1 and the second antenna 2 is in the working state. For example, the first antenna 1 needs to receive or transmit an electromagnetic wave signal, or the second antenna 2 needs to receive or transmit an electromagnetic wave signal. The target resonance frequency band has a corresponding relationship with the target radiation signal of the first antenna 1 or the second antenna 2, such as the same frequency band or a mapping relationship. The first electromagnetic wave can be an electromagnetic wave generated by an electromagnetic metamaterial resonator unit.

[0065] Optionally, the first angle range is 135° to 225°, the phase difference between the first electromagnetic wave and the second electromagnetic wave is within the range of 135° to 225°, and the first electromagnetic wave can cancel out most of the second electromagnetic wave, weakening the coupling of the electromagnetic wave between the first antenna 1 and the second antenna 2, thereby improving the performance of the antenna module.

[0066] Optionally, the first angle range is 180°, the phase difference between the first electromagnetic wave and the second electromagnetic wave is 180°, the first electromagnetic wave can cancel out the second electromagnetic wave, and the first antenna 1 and the second antenna 2 can be completely decoupled with extremely high isolation, improving the performance of the antenna module.

[0067] In a specific embodiment of the present application, the antenna module includes an antenna unit and an isolation unit 3. The antenna unit includes a first antenna 1 and a second antenna 2 arranged at intervals. The isolation unit 3 is arranged between the first antenna 1 and the second antenna 2 and is used to isolate the target electromagnetic wave signal between the first antenna 1 and the second antenna 2. The isolation unit 3 includes a first branch structure 311 arranged on a first plane and a second branch structure 321 arranged on a second plane. The first branch structure 311 is electrically connected to the second branch structure 321, and the first plane and the second plane are different. Optionally, the isolation unit 3 can be an electromagnetic metamaterial resonator. When the antenna unit is in the working state, the isolation unit 3 can generate the characteristic of a negative equivalent permittivity within the target resonance frequency band to convert the propagation form of at least part of the electromagnetic wave radiated by the first antenna 1 and / or the second antenna 2 into an evanescent wave, realizing the isolation of the target electromagnetic wave signal between the first antenna 1 and the second antenna 2, thereby ensuring the antenna performance and communication quality. The isolation unit 3 can convert the transmission form of the electromagnetic wave coupled into the isolation unit 3 into an evanescent wave, thereby realizing the isolation of the target electromagnetic wave signal between the first antenna 1 and the second antenna 2, improving the isolation between the first antenna 1 and the second antenna 2, and thus ensuring the antenna performance and communication quality.

[0068] The number of the isolation units 3 can be one or more, and the number of the isolation units 3 can be determined according to the distance between the first antenna 1 and the second antenna 2, the size of the isolation unit 3, and the required isolation effect. For example, if the distance between the first antenna 1 and the second antenna 2 is far, more isolation units 3 can be set. When the number of the isolation units 3 is multiple, the multiple isolation units 3 can be periodically arranged in a certain order between the first antenna 1 and the second antenna. Optionally, the multiple isolation units 3 can be arranged in one row or multiple rows.

[0069] In a specific embodiment of the present application, in combination with Figure 1As shown in FIG. 2, the antenna module includes an antenna unit and an isolation unit 3. The antenna unit includes a first antenna 1 and a second antenna 2 which are spaced apart. The isolation unit 3 is disposed between the first antenna 1 and the second antenna 2 and is used to isolate the target electromagnetic wave signal between the first antenna 1 and the second antenna 2. The isolation unit 3 includes a first branch structure 311 disposed on a first plane and a second branch structure 321 disposed on a second plane. The first branch structure 311 is electrically connected to the second branch structure 321, and the first plane and the second plane are different. The isolation unit 3 further includes a first substrate having a thickness. The first substrate includes a first surface 31 and a second surface 32 which are disposed opposite to each other. The first branch structure 311 is disposed on the first surface 31, and the second branch structure 321 is disposed on the second surface 32. Among them, a gap is formed between the components of the first branch structure 311, and at least a part of the projection of the second branch structure 321 on the first surface 31 can be embedded in the gap. The first branch structure 311 is electrically connected to the second branch structure 321, and the first plane and the second plane are different, so that the isolation unit 3 can form a three-dimensional structure, which can reduce the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, improve the isolation degree between the first antenna 1 and the second antenna 2, and thus improve the performance of the antenna module. The first branch structure 311 disposed on the first plane and the second branch structure 321 disposed on the second plane can form an integrated three-dimensional structure, making the structure of the antenna module more compact and having a higher integration degree, which is beneficial to the miniaturization and thinning design of electronic devices. The first branch structure 311 is disposed on the first surface 31 and the second branch structure 321 is disposed on the second surface 32, which can reduce the size of the isolation unit 3 and further reduce the size of the antenna module, which is beneficial to the miniaturization and thinning design of electronic devices. A gap is formed between the components of the first branch structure 311, and at least a part of the projection of the second branch structure 321 on the first surface 31 can be embedded in the gap, so that the electromagnetic waves generated by the first branch structure 311 and the electromagnetic waves generated by the second branch structure 321 are coupled and then interact with the electromagnetic waves generated by the first branch structure 311 and the second branch structure 321 to jointly form a first electromagnetic wave. The first electromagnetic wave can cover a larger frequency range, so that the isolation unit 3 has a wider operating bandwidth. The first electromagnetic wave can be coupled with the target electromagnetic wave signal between the first antenna 1 and the second antenna 2, so that the phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angular range, and the first electromagnetic wave and the second electromagnetic wave cancel each other, reducing the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, and thus improving the performance of the antenna module. The electromagnetic waves generated by the first branch structure 311 and the electromagnetic waves generated by the second branch structure 321 can be coupled and then coupled with the electromagnetic waves generated by the first branch structure 311 and the second branch structure 321 to jointly form a first electromagnetic wave, which can further reduce the size of the isolation unit 3, and thus can further reduce the size of the antenna module.

[0070] Optionally, the first substrate can be made of a material with a high dielectric constant, thereby reducing the size of the isolation unit 3 and further reducing the size of the wireless module. Optionally, the first substrate can be a microstrip board, and the first stub structure 311 and the second stub structure 321 can be metal lines printed on the first substrate.

[0071] Optionally, the first substrate can be a PCB board or an insulating substrate.

[0072] During electrical resonance, electromagnetic coupling can occur between the first surface 31 and the second surface 32. That is, during electrical resonance, the coupling of the near-field currents generated by the first stub structure 311 and the second stub structure 321 reduces the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, thereby improving the performance of the antenna module.

[0073] In a specific embodiment of the present application, the first stub structure 311 is formed by bending and / or splicing at least one metal patch along at least two different directions, and the second stub structure 321 is formed by bending and / or splicing at least one metal patch along at least two different directions; the structural forms of the first stub structure 311 and the second stub structure 321 are complementary, so that the electromagnetic waves generated by the first stub structure 311 and the electromagnetic waves generated by the second stub structure 321 are coupled and then interact with the electromagnetic waves generated by the first stub structure 311 and the second stub structure 321 to jointly form a first electromagnetic wave. The first electromagnetic wave can be coupled with the target electromagnetic wave signal between the first antenna 1 and the second antenna 2, so that the phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angular range, and the first electromagnetic wave and the second electromagnetic wave cancel each other out, reducing the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, thereby improving the performance of the antenna module. The electromagnetic waves generated by the first stub structure 311 and the electromagnetic waves generated by the second stub structure 321 can be coupled and then coupled with the electromagnetic waves generated by the first stub structure 311 and the second stub structure 321 to jointly form a first electromagnetic wave, which can further reduce the size of the isolation unit 3 and thus further reduce the size of the antenna module.

[0074] Optionally, the first stub structure 311 can be formed by bending a metal patch, or by extending the metal patch in different directions at different positions, or by splicing multiple metal patches; the second stub structure 321 can be formed by bending a metal patch, or by extending the metal patch in different directions at different positions, or by splicing multiple metal patches

[0075] Optionally, the first stub structure 311 is generally in a "strip" shape as a whole and is formed by the self-extension and bending of a metal patch, and the second stub structure 321 is generally in a "strip" shape as a whole and is formed by the self-extension and bending of a metal patch.

[0076] In a specific embodiment of the present application, the projection of the first stub structure 311 or the second stub structure 321 on the surface where the other is located has a target symmetry relationship (symmetrically arranged along the diagonal) or a fitting relationship with the stub structure on the surface. The electromagnetic waves generated by the first stub structure 311 and the second stub structure 321 are coupled, and then interact with the electromagnetic waves generated by the first stub structure 311 and the second stub structure 321 to jointly form a first electromagnetic wave. The first electromagnetic wave can be coupled with the target electromagnetic wave signal between the first antenna 1 and the second antenna 2, so that the phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angular range, and the first electromagnetic wave and the second electromagnetic wave cancel each other out, reducing the electromagnetic wave coupling between the first antenna 1 and the second antenna 2, thereby improving the performance of the antenna module.

[0077] The coupling of the electromagnetic waves generated by the first stub structure 311 and the electromagnetic waves generated by the second stub structure 321 can cause the energy concentration and field distribution change of the isolation unit 3 or the change of the equivalent circuit parameters. Optionally, the coupling of the electromagnetic waves generated by the first stub structure 311 and the electromagnetic waves generated by the second stub structure 321 changes the distribution pattern of the internal electromagnetic field of the isolation unit 3, making it more concentrated and compact, so as to achieve the same resonance effect in a smaller space. For example, in the capacitive-coupled isolation unit 3, by reasonably designing the position and size of the coupling capacitor, the electromagnetic field can be concentrated near the capacitor, reducing the diffusion of the electromagnetic field in space, and thus reducing the overall size of the isolation unit 3. Optionally, the coupling of the electromagnetic waves generated by the first stub structure 311 and the electromagnetic waves generated by the second stub structure 321 can introduce additional reactance and resistance components, etc. These components interact with the inductance, capacitance and other parameters of the isolation unit 3 itself, changing the equivalent circuit parameters of the isolation unit 3, so that at the same resonance frequency, the required inductance and capacitance values are reduced, and thus smaller-sized inductance and capacitance components can be used to construct the isolation unit 3. Based on this, the coupling of the electromagnetic waves generated by the first stub structure 311 and the electromagnetic waves generated by the second stub structure 321 can be coupled with the electromagnetic waves generated by the first stub structure 311 and the electromagnetic waves generated by the second stub structure 321 to jointly form a first electromagnetic wave, which can further reduce the size of the isolation unit 3, and thus can further reduce the size of the antenna module.

[0078] In a specific embodiment of the present application, the first branch structure 311 and the second branch structure 321 are both spiral structures formed by bending a section of metal patch along at least two directions; when the extension length of the first branch structure 311 and the extension length of the second branch structure 321 need to reach a set value, the first branch structure 311 and the second branch structure 321 are spiral structures formed by bending a section of metal patch along at least two directions. Under the same length requirement, the first branch structure 311 or the second branch structure 321 is set to a spiral structure, so that the size occupied by the first branch structure 311 or the second branch structure 321 can be relatively small, and the size of the isolation unit 3 can be reduced, so that the structure of the antenna module is more compact and the integration is higher, which is conducive to the miniaturization and lightweight design of electronic equipment.

[0079] In a specific embodiment of the present application, Figure 1 Figure 2 Figure 7 and Figure 8 As shown, the first branch structure 311 and the second branch structure 321 are both spiral structures formed by splicing at least two sections of metal patches together; optionally, at least two sections of metal patches are connected end to end to form a spiral structure. The metal patch can be attached to the first surface 31 or the second surface 32 and is made of conductive material. By setting it into a spiral structure, the size occupied by the first branch structure 311 or the second branch structure 321 at the same length can be relatively small, so that the structure of the antenna module is more compact and the integration is higher, which is conducive to the miniaturization and lightweight design of electronic equipment.

[0080] In a specific embodiment of the present application, the first branch structure 311 and the second branch structure 321 are each formed by splicing at least two sections of metal patches together or by bending at least one section of metal patches, including an S-shaped structure, an L-shaped structure, an I-shaped structure, an F-shaped structure, an E-shaped structure, an H-shaped structure, a C-shaped structure or a U-shaped structure.

[0081] In a specific embodiment of the present application, the antenna module includes a plurality of isolation units 3 spaced apart between the first antenna 1 and the second antenna 2, and the spacing between two adjacent isolation units 3 is greater than one eighth of the wavelength of the antenna in the working frequency band, so as to reduce the influence of the isolation unit 3 on the performance of the first antenna 1 or the second antenna 2. The spacing between the first antenna 1 or the second antenna 2 and the isolation unit 3 is greater than one eighth of the wavelength of the antenna in the working frequency band, so as to reduce the influence of the isolation unit 3 on the performance of the first antenna 1 or the second antenna 2.

[0082] The first substrates of the plurality of isolation units 3 may be the same or may be substrates that can be spliced ​​in one plane.

[0083] In a specific embodiment of the present application, the isolation unit 3 can isolate at least part of the signals of the first antenna 1 and / or the second antenna 2 in at least one of the frequency bands of 5.15 GHz - 5.85 GHz, 5.925 GHz - 7.125 GHz, and 2.4 GHz - 2.5 GHz. Due to electromagnetic coupling between the first antenna 1 and the second antenna 2, target electromagnetic wave signals of specific frequencies will be generated. The target electromagnetic wave signals can be high-frequency, low-frequency, or signals of a specific frequency band. Taking the WiFi scenario as an example, in this scenario, the target electromagnetic wave signals can include the high-frequency operating frequency band of WiFi, such as the signals in the frequency bands of 5.15 GHz - 5.85 GHz and 5.925 GHz - 7.125 GHz, and the target electromagnetic wave signals can also include the low-frequency operating frequency band of 2.4 GHz - 2.5 GHz. In other scenarios, the frequencies of the target electromagnetic wave signals can be other values.

[0084] In a specific embodiment of the present application, in combination Figure 4 、 Figure 5 and Figure 6 As shown, the antenna unit includes a second substrate, a first antenna radiator 11 and a second antenna radiator 21 spaced on the second substrate, and a third radiator 4 connecting the first antenna radiator 11 and the second antenna radiator 21. The third radiator 4 is grounded. The second substrate and the first substrate can be the same or substrates that can be spliced in a plane. The first antenna radiator 11 can be L-shaped or inverted F-shaped; the second antenna radiator 21 can be L-shaped or inverted F-shaped. The third radiator 4 can be a grounded metal patch. Among them, an interdigital structure is provided between the isolation unit 3 and the third radiator 4. As shown in 4, the isolation unit 3 is coupled to the third radiator 4 through the interdigital structure, which can reduce the conductive coupling between the isolation unit 3 and the third radiator 4, thereby reducing the spatial coupling between the first antenna 1 and the second antenna 2 and the coupling conducted through the third radiator 4.

[0085] It should be noted that the above interdigital structure can be a transmission line of a composite right / left-handed (CRLH) structure. CRLH is an artificially realized metamaterial structure. Its zero-order resonance mode or negative-order resonance mode has nothing to do with the physical size of the antenna and only relates to the lumped parameters (electrical parameters, such as impedance, capacitive reactance, inductive reactance, etc.) parasitic to the antenna. Based on this characteristic, miniaturization and wide bandwidth can be achieved while ensuring the antenna performance. In addition, CRLH also has the advantages of low loss, wide bandwidth, and easy implementation.

[0086] The isolation unit 3 includes a first connection part and a plurality of first interdigital parts 33; the third radiator 4 includes a second connection part and a plurality of second interdigital parts 41. The first connection part and the second connection part are arranged parallel and opposite to each other. One end of the first interdigital part 33 is connected to the first connection part, the other end of the first interdigital part 33 extends towards the second connection part, one end of the second interdigital part 41 is connected to the second connection part, the other end of the second interdigital part 41 extends towards the first connection part, and the plurality of first interdigital parts 33 and the plurality of second interdigital parts 41 are arranged alternately.

[0087] The first antenna radiator 11 and the second antenna radiator 21 are electrically connected through the third radiator 4, which can increase the stability when the first antenna 1 and the second antenna 2 work. There is a propagation space for electromagnetic waves between the first antenna 1 and the second antenna 2. When the first antenna 1 and / or the second antenna 2 works, there are two types of coupling paths for electromagnetic waves between the first antenna radiator 11 and the second antenna radiator 21. One is that the electromagnetic waves between the first antenna radiator 11 and the second antenna radiator 21 propagate in the propagation space and generate coupling in the propagation space; the other is that the electromagnetic waves of the first antenna radiator 11 and the second antenna radiator 21 propagate on the third radiator 4 and generate coupling on the third radiator 4. As Figure 6 shown, the number of isolation units 3 can be multiple. The multiple isolations are divided into a first isolation unit 3 and a second isolation unit 3. There is a propagation space for electromagnetic waves between the first antenna radiator 11 and the second antenna radiator 21. The first isolation unit 3 is used to reduce the electromagnetic wave coupling in the propagation space. An interdigital structure is arranged between the second isolation unit 3 and the third radiator 4, and the second isolation part is used to reduce the conduction coupling on the third radiator 4. Under the superposition effect of the first isolation unit 3 and the second isolation unit 3, the electromagnetic wave coupling between the first antenna 1 and the second antenna 2 is further reduced, and the isolation degree between the first antenna 1 and the second antenna 2 is improved.

[0088] Optionally, the phase difference between the electromagnetic waves generated by the first isolation unit 3 and the electromagnetic waves generated when the first antenna radiator 11 and the second antenna radiator 21 work is within a first angle range; the phase difference between the electromagnetic waves generated by the second isolation unit 3 and the electromagnetic waves on the third radiator 4 is within a first angle range. The frequency of the electromagnetic waves generated by the first isolation unit 3 is adapted to the frequency of the electromagnetic waves generated when the first antenna radiator 11 and the second antenna radiator 21 work; the frequency of the electromagnetic waves generated by the second isolation unit 3 is adapted to the frequency of the electromagnetic waves on the third radiator 4.

[0089] Optionally, the first isolation unit 3 and the second isolation unit 3 are alternately arranged in the propagation space between the first antenna 1 and the second antenna 2, which can further improve the isolation degree between the first antenna 1 and the second antenna 2.

[0090] The electronic device provided by the embodiments of the present disclosure includes an antenna module. The antenna module includes a first antenna 1 and a second antenna 2 which are arranged at intervals, and an isolation unit 3 arranged between the first antenna 1 and the second antenna 2; the isolation unit 3 is used for isolating the target electromagnetic wave signal between the first antenna 1 and the second antenna 2; wherein, the isolation unit 3 includes a first branch structure 311 arranged on a first plane and a second branch structure 321 arranged on a second plane, the first branch structure 311 is electrically connected to the second branch structure 321, and the first plane and the second plane are different. The target electromagnetic wave signal can isolate electromagnetic wave signals of a specific frequency band, such as high-frequency signals or low-frequency signals, etc. The isolation unit 3 includes a first branch structure 311 arranged on a first plane and a second branch structure 321 arranged on a second plane, the first branch structure 311 is electrically connected to the second branch structure 321, and the first plane and the second plane are different, so that the isolation unit 3 can form a three-dimensional structure, which can reduce the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, so that the isolation degree between the first antenna 1 and the second antenna 2 can be improved, thereby improving the performance of the antenna module. The first branch structure 311 arranged on the first plane and the second branch structure 321 arranged on the second plane can form an integrated three-dimensional structure, making the structure of the antenna module more compact and having a higher integration degree, which is beneficial to the miniaturization and thin-and-light design of the electronic device.

[0091] In a specific embodiment of the present application, the electronic device includes a display part composed of a housing and a display screen, and the antenna module is arranged in the accommodation space formed by the display part, wherein at least part of the housing forming the accommodation space is made of an insulating material or the accommodation space has an opening; optionally, the opening can be strip-shaped.

[0092] When the antenna unit is in a working state, the isolation unit 3 can generate a first electromagnetic wave within the target resonance frequency band, and the first electromagnetic wave can be superimposed on the second electromagnetic wave coupled between the first antenna 1 and the second antenna 2 to isolate the target electromagnetic wave signal between the first antenna 1 and the second antenna 2. The phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angular range, so that the first electromagnetic wave cancels out the second electromagnetic wave, reducing the coupling of electromagnetic waves between the first antenna 1 and the second antenna 2, thereby improving the performance of the antenna module.

[0093] In a specific embodiment of the present application, the electronic device includes a first body and a second body and two rotating shafts for realizing the rotational connection between the first body and the second body, and the antenna module is arranged in the accommodation space formed between the two rotating shafts.

[0094] The antenna unit includes a second substrate, a first antenna radiator 11 and a second antenna radiator 21 spaced apart on the second substrate, and a third radiator 4 connecting the first antenna radiator 11 and the second antenna radiator 21, and the third radiator 4 is grounded; wherein, an interdigital structure is provided between the isolation unit 3 and the third radiator 4, and the isolation unit 3 is coupled to the third radiator 4 through the interdigital structure, which can reduce the conductive coupling between the isolation unit 3 and the third radiator 4, thereby reducing the spatial coupling between the first antenna 1 and the second antenna 2 and the coupling conducted through the third radiator 4.

[0095] Figure 9 Among them, the a curve represents the isolation effect of the isolation unit without the electromagnetic metamaterial, the b curve represents the isolation effect of the isolation unit with the traditional single-sided arranged stub structure, and the c curve represents the isolation effect of the isolation unit provided by the embodiment of the present application. The isolation effect of the isolation unit in the antenna module provided by the present application is superior to that of the isolation unit without the electromagnetic metamaterial and the isolation unit with the single-sided arranged stub structure.

[0096] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this embodiment can be achieved, and no limitations are imposed herein.

[0097] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "a plurality" means two or more, unless otherwise specifically defined.

[0098] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present disclosure, and all of them should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An antenna module, comprising: The antenna unit comprises a first antenna and a second antenna arranged at an interval; an isolation unit, disposed between the first antenna and the second antenna, and configured to isolate a target electromagnetic wave signal between the first antenna and the second antenna; The isolation unit includes a first branch structure arranged on a first plane and a second branch structure arranged on a second plane, the first branch structure is electrically connected to the second branch structure, and the first plane and the second plane are different.

2. The antenna module according to claim 1, wherein: When the antenna unit is in a working state, the isolation unit can generate a first electromagnetic wave within a target resonant frequency band, and the first electromagnetic wave can be superimposed on a second electromagnetic wave coupled between the first antenna and the second antenna to isolate a target electromagnetic wave signal between the first antenna and the second antenna, and a phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angle range; and / or, When the antenna unit is in working state, the isolation unit can generate the characteristic of negative equivalent dielectric constant within the target resonant frequency band to convert the propagation form of at least part of the electromagnetic waves radiated by the first antenna and / or the second antenna received into evanescent waves, thereby isolating the target electromagnetic wave signal between the first antenna and the second antenna.

3. The antenna module according to claim 1 or 2, wherein: The isolation unit further includes a first substrate having a thickness, the first substrate including a first surface and a second surface disposed opposite to each other, the first branch structure being disposed on the first surface, and the second branch structure being disposed on the second surface; Wherein, gaps are formed between components of the first branch structure, and at least a portion of a projection of the second branch structure on the first surface can be embedded in the gaps; and / or, When electric resonance occurs, the first surface and the second surface can be electromagnetically coupled.

4. The antenna module according to claim 3, wherein: The first branch structure is formed by bending and / or splicing at least one section of metal patch along at least two different directions, and the second branch structure is formed by bending and / or splicing at least one section of metal patch along at least two different directions; The structural morphologies of the first branch structure and the second branch structure are in a complementary relationship; or, The projection of the first branch structure or the second branch structure on the surface where the other is located has a target symmetric relationship or a chimeric relationship with the branch structure on the surface.

5. The antenna module according to claim 4, wherein: The first branch structure and the second branch structure are both spiral structures formed by bending a section of metal patch along at least two directions; or, The first branch structure and the second branch structure are both spiral structures formed by splicing at least two sections of metal patches; or, The first branch structure and the second branch structure are each formed by splicing at least two sections of metal patches together or by bending at least one section of metal patches to form an S-shaped structure, an L-shaped structure, an I-shaped structure, an F-shaped structure, an E-shaped structure, or a U-shaped structure.

6. The antenna module according to claim 1, wherein: The antenna module comprises a plurality of isolation units spaced between the first antenna and the second antenna, and the spacing between two adjacent isolation units is greater than one eighth of the wavelength of the antenna in the working frequency band; and / or, The isolation unit can isolate at least part of the signal of the first antenna and / or the second antenna in at least one of the 5.15 GHz-5.85 GHz frequency band, the 5.925 GHz-7.125 GHz frequency band, and the 2.4 GHz-2.5 GHz frequency band.

7. The antenna module according to claim 1, wherein: The antenna unit includes a second substrate, a first antenna radiator and a second antenna radiator arranged on the second substrate at intervals, and a third radiator connecting the first antenna radiator and the second antenna radiator, wherein the third radiator is grounded; An interdigital structure is provided between the isolation unit and the third radiator, and the isolation unit is coupled with the third radiator through the interdigital structure to reduce the spatial coupling between the first antenna and the second antenna and the coupling conducted through the third radiator.

8. An electronic device, comprising an antenna module, the antenna module comprising a first antenna and a second antenna arranged at an interval, and an isolation unit arranged between the first antenna and the second antenna; The isolation unit is used to isolate the target electromagnetic wave signal between the first antenna and the second antenna; in, The isolation unit includes a first branch structure arranged on a first plane and a second branch structure arranged on a second plane, the first branch structure is electrically connected to the second branch structure, and the first plane and the second plane are different.

9. The electronic device according to claim 8, wherein: The electronic device includes a display portion consisting of a housing and a display screen, and the antenna module is arranged in a receiving space formed by the display portion, wherein at least a portion of the housing constituting the receiving space is made of an insulating material or the receiving space has an opening; and / or, When the antenna unit is in a working state, the isolation unit can generate a first electromagnetic wave within a target resonant frequency band, and the first electromagnetic wave can be superimposed on a second electromagnetic wave coupled between the first antenna and the second antenna to isolate the target electromagnetic wave signal between the first antenna and the second antenna, and the phase difference between the first electromagnetic wave and the second electromagnetic wave is within a first angle range.

10. The electronic device according to claim 8, wherein: The electronic device comprises a first body, a second body and two rotating shafts for realizing a rotational connection between the first body and the second body, and the antenna module is arranged in a receiving space formed between the two rotating shafts; and / or, The antenna unit includes a second substrate, a first antenna radiator and a second antenna radiator arranged on the second substrate at intervals, and a third radiator connecting the first antenna radiator and the second antenna radiator, wherein the third radiator is grounded; An interdigital structure is provided between the isolation unit and the third radiator, and the isolation unit is coupled with the third radiator through the interdigital structure to reduce the spatial coupling between the first antenna and the second antenna and the coupling conducted through the third radiator.

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