Antenna module and electronic equipment

Abstract

The invention provides an antenna module and electronic equipment, and the antenna module comprises an antenna unit which comprises a first antenna and a second antenna which are arranged at an interval; the at least two isolation units are arranged between the first antenna and the second antenna and used for converting the propagation form of at least part of received electromagnetic waves radiated by the first antenna and / or the second antenna into evanescent waves so as to isolate target radiation signals between the first antenna and the second antenna; wherein at least one of two adjacent isolation units in the at least two isolation units is provided with a parasitic branch structure facing the opposite side.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to an antenna module and an electronic device including the antenna module. Background Art

[0002] In modern wireless communication systems, the main antenna and the secondary antenna are key components for the antenna module to achieve efficient and stable communication. Among them, the main antenna is usually used for primary data transmission, while the secondary antenna is used to enhance signal reception, provide redundancy, or support advanced functions such as multiple-input multiple-output (MIMO). However, in actual operation, the interference problem between the main antenna and the secondary antenna has become one of the important factors affecting system performance. Therefore, how to reduce the interference between the main antenna and the secondary antenna has become a research hotspot for technicians in this field. Summary of the invention

[0003] An antenna module, comprising:

[0004] The antenna unit comprises a first antenna and a second antenna arranged at an interval;

[0005] At least two isolation units, disposed between the first antenna and the second antenna, for converting 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, so as to isolate the target radiation signal between the first antenna and the second antenna;

[0006] Wherein, at least one of two adjacent isolation units among the at least two isolation units is provided with a parasitic branch structure facing the other.

[0007] Optionally, the at least two isolation units form a metamaterial array, and when electrical resonance occurs, the metamaterial array generates a characteristic of a negative equivalent dielectric constant within a target resonance frequency band to isolate a target radiation signal between the first antenna and the second antenna;

[0008] and / or,

[0009] A parasitic branch structure is provided at at least one end of the isolation unit in a first direction to form an equivalent capacitance between two adjacent isolation units, and the first direction is a direction in which at least two isolation units are arranged to form a metamaterial array.

[0010] Optionally, the isolation unit comprises a sub-wavelength structure consisting of a substrate and a metal patch disposed on the substrate;

[0011] and,

[0012] The metal patch is an I-shaped patch, and / or the substrate is an absorbing material or a flexible medium, and the isolation unit is flexible.

[0013] Optionally, the metal patch includes:

[0014] The first branches and the second branches are arranged at intervals along a second direction, wherein the second direction is perpendicular to the first direction;

[0015] a third branch connecting the first branch and the second branch in the second direction;

[0016] Among them, the distance between the connection position of the third branch and the first branch to the opposite ends of the first branch in the first direction is greater than zero, and the distance between the connection position of the third branch and the second branch to the opposite ends of the second branch in the first direction is greater than zero.

[0017] Optionally, the third branch comprises a first part, a second part and a third part connected in sequence, wherein the first part and the third part extend along the second direction, and the second part extends along the first direction;

[0018] and / or,

[0019] There is a first distance between the second portion and the first branch, and there is a second distance between the second portion and the second branch, and the first distance is the same as or different from the second distance;

[0020] and / or,

[0021] A width of the second portion in the second direction is smaller than a width of the first portion or the third portion in the first direction.

[0022] Optionally, the size of the isolation unit is smaller than the wavelength of the electromagnetic wave generated by the first antenna or the second antenna, and the structural size of the isolation unit is 6.0±0.2mm×5.0±0.2mm;

[0023] and / or,

[0024] 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 0.6±0.05 mm;

[0025] and / or,

[0026] The isolation unit can isolate signals of the first antenna and / or the second antenna in a frequency band of 5.15 to 5.85 GHz and / or signals in a frequency band of 5.925 to 7.125 GHz.

[0027] Optionally, the first antenna is a PIFA antenna, the second antenna is a PIFA antenna, and F of the first antenna and the second antenna are in opposite directions;

[0028] and / or,

[0029] The antenna module also includes a left-handed material arranged between the first antenna and the second antenna, which is used to deflect the transmission direction of the electromagnetic waves generated by the first antenna or the second antenna or destroy the interference of the electromagnetic waves to improve the isolation between the first antenna and the second antenna.

[0030] An electronic device includes an antenna module, wherein the antenna module includes a first antenna and a second antenna arranged at an interval, and a metamaterial array arranged between the first antenna and the second antenna;

[0031] The metamaterial array is capable of converting 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, so as to isolate the target radiation signal between the first antenna and the second antenna;

[0032] Wherein, at least one of two adjacent isolation units in the metamaterial array is provided with a parasitic branch structure facing the other.

[0033] Optionally, the electronic device includes a display portion consisting of a housing and a display screen, and the antenna module is disposed 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;

[0034] and / or,

[0035] The isolation unit of the metamaterial array is provided with a parasitic branch structure at at least one end in a first direction to form an equivalent capacitance between two adjacent isolation units, wherein the first direction is a direction in which at least two isolation units are arranged to form the metamaterial array.

[0036] Optionally, the electronic device comprises a first body and 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;

[0037] and / or,

[0038] When electric resonance occurs, the metamaterial array generates a characteristic of a negative equivalent dielectric constant within a target resonance frequency band, so as to isolate a target radiation signal between the first antenna and the second antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0040] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0041] Figure 1 A schematic diagram of the structure of an antenna module provided in one embodiment of the present application;

[0042] Figure 2 A schematic diagram of an equivalent circuit of an isolation unit in an antenna module provided by an embodiment of the present application;

[0043] Figure 3 An enlarged view of an isolation unit in an antenna module provided in one embodiment of the present application;

[0044] Figure 4 It is a schematic diagram of a local structure when an antenna module including an "S"-shaped isolation unit is arranged in an electronic device;

[0045] Figure 5 A schematic diagram of a local structure of an antenna module provided by an embodiment of the present application when it is disposed in an electronic device;

[0046] Figure 6 For Figure 4 and Figure 5 The antenna module in the structure shown is simulated to obtain a schematic diagram of a curve showing a change in isolation between the primary and secondary antennas (i.e., the first antenna and the second antenna);

[0047] Figure 7 The figure is a schematic diagram of the simulation comparison results of the H-plane radiation pattern of the first antenna when an "S"-shaped isolation unit and an I-shaped isolation unit are used as isolation units at a frequency of 5.47 GHz;

[0048] Figure 8 The figure is a schematic diagram of the simulation comparison results of the H-plane radiation pattern of the first antenna when an "S"-shaped isolation unit and an I-shaped isolation unit are used as isolation units at a frequency of 6.125 GHz;

[0049] Fig. 9 The figure is a schematic diagram of the simulation comparison results of the H-plane radiation pattern of the first antenna when an "S"-shaped isolation unit and an I-shaped isolation unit are used as isolation units at a frequency of 7.025 GHz;

[0050] Fig.10 A schematic diagram of the structure of an electronic device provided by an embodiment of the present application;

[0051] Fig.11 A schematic diagram of a local structure of an antenna module arrangement position in an electronic device provided by an embodiment of the present application;

[0052] Fig.12 A partial structural diagram of the location of the antenna module in an electronic device provided by another embodiment of the present application;

[0053] Fig.13 for Fig.11 A partial enlarged view of . DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0055] It is obvious to those skilled in the art that various modifications and changes can be made in this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and changes of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0056] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0057] As described in the background technology section, how to reduce the interference between the main antenna and the secondary antenna has become a research hotspot for those skilled in the art.

[0058] In view of this, an embodiment of the present application provides an antenna module, such as Figure 1 As shown, the antenna module includes:

[0059] An antenna unit, the antenna unit comprising a first antenna 10 and a second antenna 20 arranged at an interval. Optionally, in one embodiment of the present application, the first antenna 10 is a main antenna and the second antenna 20 is a secondary antenna. In another embodiment of the present application, the first antenna 10 is a secondary antenna and the second antenna 20 is a main antenna. The present application does not limit this, and it depends on the specific situation.

[0060] At least two isolation units 30 are provided between the first antenna 10 and the second antenna 20, and are used to convert the propagation form of at least part of the electromagnetic waves radiated by the first antenna 10 and / or the second antenna 20 received into evanescent waves, so as to isolate the target radiation signal between the first antenna 10 and the second antenna 20, and reduce the interference between the first antenna 10 and the second antenna 20. The target radiation signal may be a high-frequency signal, a low-frequency signal, or a signal in a specific frequency band, which is not limited in the present application and depends on the specific situation.

[0061] Specifically, in one embodiment of the present application, the at least two isolation units can convert the propagation form of at least part of the electromagnetic waves radiated by the received first antenna into evanescent waves, thereby reducing the interference of the electromagnetic waves radiated by the first antenna on the second antenna; in another embodiment of the present application, the at least two isolation units can convert the propagation form of at least part of the electromagnetic waves radiated by the second antenna into evanescent waves, thereby reducing the interference of the electromagnetic waves radiated by the second antenna on the first antenna; in yet another embodiment of the present application, the at least two isolation units convert the propagation form of at least part of the electromagnetic waves radiated by the first antenna into evanescent waves, and convert the propagation form of at least part of the electromagnetic waves radiated by the second antenna into evanescent waves, thereby reducing the mutual interference between the first antenna and the second antenna.

[0062] Furthermore, in this embodiment, Figure 1 As shown, at least one of the adjacent isolation units 30 of the at least two isolation units 30 is provided with a parasitic branch structure 301 toward the other side, so that an equivalent capacitance is introduced between the adjacent isolation units 30 through the parasitic branch structure 301, thereby reducing the resonant frequency, and then reducing the size of the antenna module under the premise that the resonant frequency of the antenna module is fixed, which is conducive to the miniaturization of the antenna module.

[0063] It should be noted that in recent years, electromagnetic metamaterials have shown important application value and development prospects in both military and civilian fields with their unique design concepts and strange object properties, and have attracted widespread attention in many research fields such as wave absorption, stealth, and optics. However, since the communication band of consumer electronic products is low and the range is wide, and the requirements for equipment miniaturization are very high, and metamaterials are large in size and have a narrow frequency band, there are currently few applications of metamaterials in the field of consumer electronics.

[0064] In the antenna module provided in the embodiment of the present application, at least one of the adjacent isolation units among the at least two isolation units is provided with a parasitic branch structure toward the other side, so that an equivalent capacitance is formed between the adjacent isolation units through the parasitic branch structure, thereby reducing the resonant frequency of the antenna module. On the premise that the resonant frequency of the antenna module is fixed, the size of the antenna module can be smaller, which is conducive to the miniaturization of the antenna module.

[0065] Therefore, in the antenna module provided in the present application, the isolation unit can adopt metamaterials, thereby reducing the size of the metamaterial isolation unit by setting at least one of the adjacent isolation units of the at least two isolation units to have a parasitic branch structure facing each other, so that the metamaterial isolation unit is smaller in size and can be applied in the field of consumer electronics.

[0066] On the basis of the above embodiments, in one embodiment of the present application, the at least two isolation units form a metamaterial array. In this embodiment, when electric resonance occurs, the metamaterial array generates a negative equivalent dielectric constant characteristic within the target resonant frequency band, thereby constructing a transmission stopband within a specific frequency band, converting the electromagnetic clutter coupled into the isolation unit into an evanescent wave, thereby significantly improving the isolation between the first antenna and the second antenna, so as to isolate the target radiation signal between the first antenna and the second antenna.

[0067] It should be noted that, in this embodiment, when electrical resonance occurs, the equivalent circuit of the isolation unit satisfies the principle of double-loop mirror symmetry, such as Figure 2 As shown, Figure 2 FIG. 1 is a schematic diagram of an equivalent circuit of the isolation unit when electrical resonance occurs. Figure 2 It can be seen that when electric resonance occurs, the equivalent circuit of the isolation unit satisfies the principle of double-loop mirror symmetry. At this time, the equivalent circuit can be regarded as two completely symmetrical loops, thereby generating a negative equivalent dielectric constant within a specific resonant frequency band.

[0068] In another embodiment of the present application, the at least two isolation units form a metamaterial array. When electric resonance occurs, the metamaterial array generates a negative equivalent dielectric constant characteristic within the target resonant frequency band. At the same time, since its equivalent magnetic permeability is positive, that is, an electrically negative characteristic is achieved, a transmission stop band is constructed within a specific frequency band, and the electromagnetic clutter coupled into the isolation unit is converted into an evanescent wave, thereby significantly improving the isolation between the first antenna and the second antenna, so as to better isolate the target radiation signal between the first antenna and the second antenna.

[0069] It should be noted that in the above embodiments, the target resonant frequency band and the target radiation signal have a corresponding relationship. Optionally, in one embodiment of the present application, the target resonant frequency band and the target radiation signal have the same frequency band. In another embodiment of the present application, the target resonant frequency band and the target radiation signal have a mapping relationship. The present application does not limit this and it depends on the specific circumstances.

[0070] On the basis of any of the above embodiments, in one embodiment of the present application, a parasitic branch structure is provided at at least one end of the isolation unit in a first direction, wherein the first direction is a direction in which at least two isolation units are arranged to form a metamaterial array, so as to form an equivalent capacitance between two adjacent isolation units, thereby reducing the resonant frequency of the antenna module, thereby enabling the size of the antenna module to be smaller while fixing the resonant frequency of the antenna module, which is conducive to the miniaturization of the antenna module.

[0071] On the basis of any of the above embodiments, in one embodiment of the present application, the isolation unit includes a sub-wavelength structure composed of a substrate and a metal patch arranged on the substrate, so that the isolation unit is a metamaterial structure, which reduces the size of the antenna module and is conducive to the miniaturization of the antenna module. Moreover, the isolation unit provided in the embodiment of the present application is composed of a substrate and a metal patch, and has a simple structure.

[0072] Optionally, in one embodiment of the present application, the metal patch is an I-shaped structure patch, so that on the basis of realizing the antenna resonance performance through the self-resonance structure of the I-shaped structure patch, the antenna resonance performance is realized through the coupling between adjacent I-shaped structure patches, and then the longitudinal height of the metal patch is significantly reduced while the lateral width of the metal patch remains unchanged, so that the antenna module can be accommodated in some electronic devices with a smaller antenna setting space. It should be noted that, in this embodiment, the lateral width of the metal patch is the width of the metal patch in the first direction, and the longitudinal height of the metal patch is the height of the metal patch in the second direction. When the parts of the metal patch are located in the same plane, the second direction is perpendicular to the first direction.

[0073] In another embodiment of the present application, the substrate is an absorbing material, so as to reduce the interference between the first antenna and the second antenna and increase the isolation between the first antenna and the second antenna by absorbing part of the electromagnetic waves radiated by the first antenna and / or the second antenna.

[0074] Based on any of the above embodiments, in one embodiment of the present application, the isolation unit is flexible, so that when the isolation unit is accommodated inside the electronic device, it can be bent according to the accommodation space inside the electronic device to achieve conformity with the electronic device.

[0075] Optionally, based on the above embodiments, in one embodiment of the present application, the substrate is a flexible medium, so that when the isolation unit is accommodated inside the electronic device, it can be bent according to the accommodation space inside the electronic device to achieve conformity with the electronic device. However, the present application does not limit this. In other embodiments of the present application, the substrate can also be a non-flexible medium, but has a shape that matches the accommodation space in the electronic device, depending on the specific situation.

[0076] Optionally, in one embodiment of the present application, Figure 3 As shown, the metal patch includes: a first branch 31 and a second branch 32 arranged at intervals along a second direction Y, wherein the second direction Y is perpendicular to the first direction X; and a third branch 33 connecting the first branch 31 and the second branch 32 in the second direction Y, so that the metal patch is an I-shaped structure.

[0077] Specifically, in one embodiment of the present application, the distance between the connection position of the third branch and the first branch to the two opposite ends of the first branch in the first direction is greater than zero, so that the two opposite ends of the first branch in the first direction have a parasitic branch structure, so that an equivalent capacitance can be formed between the first branches in adjacent isolation units, thereby reducing the resonant frequency. Under the premise of a fixed resonant frequency, the size of the isolation unit is reduced, which is suitable for the development of miniaturization of antenna modules; the distance between the connection position of the third branch and the second branch to the two opposite ends of the second branch in the first direction is greater than zero, so that the two ends of the third branch in the first direction have a parasitic branch structure, so that an equivalent capacitance can be formed between the third branches in adjacent isolation units, thereby reducing the resonant frequency. Under the premise of a fixed resonant frequency, the size of the isolation unit is reduced, which is suitable for the development of miniaturization of antenna modules.

[0078] It should be noted that in the antenna module provided in the embodiment of the present application, the isolation unit can form multiple loops, such as the end of the first branch toward the first antenna as the starting point, along the first branch, the third branch to the end of the second branch toward the second antenna as a loop, the end of the first branch toward the first antenna as the starting point, along the first branch, the third branch to the end of the second branch toward the first antenna as another loop, the end of the first branch toward the second antenna as the starting point, along the first branch, the third branch to the end of the second branch toward the second antenna as another loop, the end of the first branch toward the second antenna as the starting point, along the first branch, the third branch to the end of the second branch toward the second antenna as another loop, the end of the first branch toward the second antenna as the starting point, along the first branch, the third branch to the end of the second branch toward the first antenna as another loop, etc. Among them, one loop corresponds to one resonant frequency, and different isolation units can also form more equivalent loops through the coupling of parasitic branch structures to generate more resonant frequencies, so that the bandwidth of the antenna module is wider.

[0079] Optionally, based on the above embodiment, in one embodiment of the present application, continue as follows Figure 3 As shown, the third branch 33 includes a first portion 331, a second portion 332 and a third portion 333 which are sequentially connected, wherein the first portion 331 and the third portion 333 extend along the second direction Y, and the second portion 332 extends along the first direction X, so as to increase the length of the third branch 33, thereby increasing the equivalent inductance of the isolation unit. Figure 2 For example, the equivalent inductance corresponding to the first part is La, the equivalent inductance corresponding to the second part is Lb, and the equivalent inductance corresponding to the third part is Lc; Cb is the equivalent capacitance formed between the parasitic branch structure of the isolation unit and the parasitic branch structure of the adjacent isolation unit, and Ca is the equivalent capacitance formed inside the same isolation unit.

[0080] It should be noted that, although in the present embodiment, the third branch node is composed of a first part, a second part and a third part, the present application is not limited to this. In other embodiments of the present application, the third branch node can also be composed of more broken line structures, thereby further increasing the equivalent inductance of the isolation unit, depending on the specific circumstances.

[0081] On the basis of the above embodiments, in one embodiment of the present application, the second part and the first branch have a first spacing, the second part and the second branch have a second spacing, and the first spacing and the second spacing are the same, so that the first part and the second part are evenly arranged along the second direction between the first branch and the second branch. However, the present application does not limit this, and in other embodiments of the present application, the first spacing and the second spacing may also be different, depending on the specific situation.

[0082] Based on any of the above embodiments, in one embodiment of the present application, continue as follows Figure 3 As shown, the width of the second part 332 in the second direction Y is smaller than the width of the first part 331 in the first direction X, so as to increase the length of the third branch 33 while the connection position between the first part 331 and the first branch 31 and the connection position between the third part 333 and the second branch 32 are fixed, thereby increasing the equivalent inductance of the isolation unit.

[0083] In another embodiment of the present application, continue as Figure 3 As shown, the width of the second part 332 in the second direction Y is smaller than the width of the third part 333 in the first direction X, so as to increase the length of the third branch 33 under the premise that the connection position between the first part 331 and the first branch 31 and the connection position between the third part 333 and the second branch 32 are fixed, thereby increasing the equivalent inductance of the isolation unit.

[0084] In another embodiment of the present application, continue as Figure 3 As shown, the width of the second portion 332 in the second direction Y is smaller than the width of the first portion 331 in the first direction X, and the width of the second portion 332 in the second direction Y is smaller than the width of the third portion 333 in the first direction X, so that the length of the third branch 33 is further increased under the premise that the connection position between the first portion 331 and the first branch 31 and the connection position between the third portion 333 and the second branch 32 are fixed, thereby increasing the equivalent inductance of the isolation unit. However, this application does not limit this, and it depends on the specific situation.

[0085] Based on any of the above embodiments, in one embodiment of the present application, the size of the isolation unit is smaller than the wavelength of the electromagnetic wave generated by the first antenna, so that the size of the isolation unit is smaller. Therefore, under the premise that the space between the first antenna and the second antenna is fixed, more isolation units can be accommodated between the first antenna and the second antenna, thereby improving the isolation between the first antenna and the second antenna, and enabling the antenna module to be used in smaller or thinner electronic devices.

[0086] Optionally, the size of the isolation unit in the longitudinal direction is smaller than the size of the first antenna in the longitudinal direction, so that the isolation unit does not occupy additional space in the longitudinal direction, thereby minimizing the size of the antenna module in the longitudinal direction.

[0087] In another embodiment of the present application, the size of the isolation unit is smaller than the wavelength of the electromagnetic wave generated by the second antenna, so that the size of the isolation unit is smaller. Therefore, under the premise that the space between the first antenna and the second antenna is fixed, more isolation units can be accommodated between the first antenna and the second antenna, thereby improving the isolation between the first antenna and the second antenna, and at the same time enabling the antenna module to be applied to smaller or thinner electronic devices.

[0088] Optionally, a dimension of the isolation unit in the longitudinal direction is smaller than a dimension of the second antenna in the longitudinal direction, so that the isolation unit does not occupy additional space in the longitudinal direction, thereby minimizing the dimension of the antenna module in the longitudinal direction.

[0089] In another embodiment of the present application, the size of the isolation unit is smaller than the wavelength of the electromagnetic wave generated by the first antenna, and the size of the isolation unit is smaller than the wavelength of the electromagnetic wave generated by the second antenna, so that the size of the isolation unit is smaller, so that under the premise that the space between the first antenna and the second antenna is fixed, more isolation units can be accommodated between the first antenna and the second antenna, thereby improving the isolation between the first antenna and the second antenna, and at the same time enabling the antenna module to be used in smaller or thinner electronic devices.

[0090] Optionally, the size of the isolation unit in the longitudinal direction is smaller than the size of the first antenna in the longitudinal direction, and smaller than the size of the second antenna in the longitudinal direction, so that the isolation unit does not occupy additional space in the longitudinal direction, thereby minimizing the size of the antenna module in the longitudinal direction.

[0091] Specifically, in one embodiment of the present application, the structural dimensions of the isolation unit are 6.0±0.2mm×5.0±0.2mm, so that the size of the isolation unit is small. Therefore, under the premise that the space between the first antenna and the second antenna is fixed, more isolation units can be accommodated between the first antenna and the second antenna, thereby improving the isolation between the first antenna and the second antenna, and at the same time enabling the antenna module to be used in smaller or thinner electronic devices.

[0092] Moreover, the structural dimension of the isolation unit in the longitudinal direction is 5.0±0.2 mm, which can significantly reduce the dimension of the isolation unit in the longitudinal direction, reduce the space requirement of the antenna module, and facilitate application in smaller and thinner electronic devices. Specifically, in one embodiment of the present application, the dimension of the metal patch in the longitudinal direction can be reduced to 5.0 mm, but the present application does not limit this, and it depends on the specific situation.

[0093] Based on any of the above embodiments, in one embodiment of the present application, the antenna module includes a plurality of isolation units spaced apart between the first antenna and the second antenna, and the spacing between adjacent isolation units is 0.6±0.05 mm, so that an equivalent capacitance can be formed between the parasitic branch structures of adjacent isolation units, thereby reducing the size of the antenna module under the premise of a fixed resonant frequency, which is beneficial to the miniaturization of the antenna module while ensuring that there is no short circuit between adjacent isolation units.

[0094] Optionally, in one embodiment of the present application, the structural dimensions of the isolation unit period in the plurality of isolation units (i.e., the structural dimensions of the isolation unit plus the structural dimensions of the spacing between adjacent isolation units) can be reduced to 6.6 mm × 6.6 mm, which can achieve miniaturization of the isolation unit period. However, the present application does not limit this, and can be flexibly adjusted according to the specific frequency band in which the antenna module needs to improve performance. The specific dimensions can be estimated by formula based on the equivalent circuit model corresponding to the isolation unit, or calculated by computer electromagnetic simulation software combined with S parameter inversion method.

[0095] Specifically, in one embodiment of the present application, the material of the substrate is FR-4 material, the dielectric constant is 4.3, the loss tangent is 0.02, the thickness is 0.5mm, the first antenna and the second antenna are printed on both sides of the first direction of the substrate, and 8 I-shaped metasurface unit metal patches are arranged in sequence in the middle, and the spacing between adjacent metal patches is 0.6mm. However, the present application does not limit this, and it depends on the specific situation.

[0096] Combination Figure 2 and Figure 3 It can be seen that the I-shaped metamaterial isolation unit is equivalent to connecting four equivalent capacitors in parallel on both sides of the equivalent circuit, because the two ends are loaded with lateral parasitic branch structures, which increases the coupling between the isolation units and reduces the resonant frequency, thereby achieving a miniaturized design. At the same time, because the metamaterial isolation unit structure has a smaller unit period, when the same number of units are arranged between the main and auxiliary antennas, the total width in the lateral direction (i.e., the first direction) is also significantly reduced, such as Figure 4 and Figure 5 As shown, 8 isolation units are also arranged equidistantly. The "S"-shaped isolation unit requires at least 62.0 mm of lateral space, while the I-shaped metamaterial isolation unit in this embodiment only requires 52.2 mm.

[0097] Based on any of the above embodiments, in one embodiment of the present application, the isolation unit can isolate the signals of the first antenna and / or the second antenna in the 5.15~5.85GHz frequency band and / or the signals in the 5.925~7.125GHz frequency band, so that the antenna module can be applied to signal radiation and / or reception in the WiFi7 frequency band and has better antenna performance.

[0098] like Figure 6 As shown, Figure 6 For Figure 4 and Figure 5 The antenna module in the structure shown in the figure is simulated to obtain a curve diagram of the change of the isolation between the main antenna and the auxiliary antenna (i.e., the first antenna and the second antenna). Figure 5 The antenna module in the structure shown in the figure is simulated to obtain a schematic diagram of the change curve of the isolation between the main and auxiliary antennas (i.e., the first antenna and the second antenna). Curve K2 is Figure 4 The antenna module in the structure shown is simulated to obtain a schematic diagram of a curve showing a change in isolation between the primary and secondary antennas (ie, the first antenna and the second antenna).

[0099] Depend on Figure 6 It can be seen that Figure 5 The solution of the I-shaped isolation unit shown can significantly improve the isolation of the main and auxiliary antennas in almost the entire WiFi high-frequency operating frequency band (5.15-5.15-5.85 GHz, 5.925-7.125 GHz), with only some losses at individual frequency points, and almost no impact on the isolation performance of the WiFi low-frequency operating frequency band (2.4-2.5 GHz). It can be seen that the antenna module provided in the embodiment of the present application has a significant improvement effect on the isolation performance of wireless communication devices operating in the WiFi frequency band, and the effective frequency band is relatively wide.

[0100] In addition, in the antenna module provided in the embodiment of the present application, at least two isolation units are used to isolate the target radiation signal between the first antenna and the second antenna, which is also helpful to optimize the horizontal radiation field of the first antenna and the second antenna, improve the radiation dead angle problem of the traditional antenna module, and enhance the complementarity of the far-field radiation field of the first antenna and the second antenna, thereby facilitating the improvement of the throughput performance of the antenna module. It should be noted that throughput refers to the amount of data successfully transmitted per unit time for a network, device, port, virtual circuit or other facility.

[0101] like Figure 7-Figure 9 As shown, Figure 7-Figure 9The following are the simulation comparison results of the H-plane radiation pattern of the first antenna when the "S" type isolation unit and the I-shaped isolation unit are used as the isolation unit at the three typical frequency points of 5.47 GHz, 6.125 GHz and 7.025 GHz respectively. Among them, curve K3 is the simulation result of the H-plane radiation pattern of the first antenna when the "S" type isolation unit is used, and curve K4 is the simulation result of the H-plane radiation pattern of the first antenna when the I-shaped isolation unit is used. Figure 7-Figure 9 It can be seen that at the three typical frequency points of 5.47 GHz, 6.125 GHz, and 7.025 GHz, the simulation results of the H-plane far-field radiation pattern of the first antenna show that compared with the antenna module using an "S"-shaped isolation unit, the antenna module provided in the embodiment of the present application uses an I-shaped isolation unit, and the outer radiation pattern of the first antenna (phi=180° direction) is fuller and the gain is improved (the larger the number on the periphery of the pattern, the greater the antenna strength and the better the antenna gain). It should be noted that Figure 7-Figure 9 The 180° direction of the middle and outer radiation patterns corresponds to the first direction (ie, horizontal direction) of the antenna module. Figure 7-Figure 9 It can be seen that

[0102] Similarly, compared to the antenna module using an "S"-shaped isolation unit, in the antenna module provided in the embodiment of the present application, the outer radiation pattern of the second antenna (phi=180° direction) is fuller and the gain is improved (the larger the numbers on the periphery of the pattern, the greater the intensity, the better the gain). The fuller outer radiation pattern of the first antenna and the second antenna (phi=180° direction) can make the first antenna and the second antenna have better complementary pattern when the first antenna and the second antenna work at the same time, and the overall antenna system will have better omnidirectional radiation characteristics. At the same time, Figure 7-Figure 9 It can be seen that compared with the antenna module using an "S"-shaped isolation unit, the I-shaped isolation unit in the antenna module provided in the embodiment of the present application has a significant improvement effect on the radiation dead angle problem of the antenna pattern, which is beneficial to the stable improvement of the throughput performance of the entire wireless system.

[0103] Based on any of the above embodiments, in one embodiment of the present application, the first antenna is a PIFA antenna, the second antenna is a PIFA antenna, and the F directions of the first antenna and the second antenna are opposite, but the present application is not limited to this. In other embodiments of the present application, the first antenna and the second antenna can also be other types of antennas, depending on the specific circumstances.

[0104] It should be noted that in the above embodiments, the isolation unit of the metamaterial is insulated from zero potential, that is, the isolation unit is suspended and not grounded, so as to improve the antenna performance of the antenna module without transmitting the received electromagnetic waves to the ground, thereby hardly affecting the antenna efficiency. Among them, the antenna efficiency refers to the ratio of the input power converted by the antenna into the radiated power, which is usually used as one of the important indicators to measure the antenna performance.

[0105] In summary, the antenna module provided in the embodiment of the present application can meet the broadband working requirements of electronic devices, achieve improved isolation between antennas in an ultra-wide frequency band and improved far-field radiation pattern, almost covering the WiFi high-frequency working bands of 5.15-5.85 GHz and 5.925-7.125 GHz, while hardly affecting the radiation characteristics of the 2.4-2.5 GHz low-frequency working band.

[0106] Based on any of the above embodiments, in one embodiment of the present application, the antenna module also includes: at least one ground isolation branch arranged between the first antenna and the second antenna, and the ground isolation branch is grounded to isolate the target radiation signal between the first antenna and the second antenna by transmitting at least part of the electromagnetic waves radiated by the received first antenna and / or the second antenna to the ground.

[0107] Optionally, in one embodiment of the present application, the grounding isolation branch disconnects multiple isolation units and is located between multiple isolation units, that is, some isolation units are located on the side of the grounding isolation branch facing the first antenna, and some isolation units are located on the side of the grounding isolation branch facing the second antenna, but the present application does not limit this and it depends on the specific situation.

[0108] Based on any of the above embodiments, in one embodiment of the present application, the antenna module also includes a left-handed material arranged between the first antenna and the second antenna. Different from the isolation unit of the metamaterial, the isolation unit of the left-handed material is used to deflect the transmission direction of at least part of the electromagnetic waves generated by the first antenna or the second antenna or destroy the interference of the electromagnetic waves, so as to improve the isolation between the first antenna and the second antenna.

[0109] Optionally, in one embodiment of the present application, the isolation unit of the left-handed material is used to deflect the transmission direction of at least part of the electromagnetic waves generated by the first antenna and the second antenna or destroy the interference of the electromagnetic waves to further improve the isolation between the first antenna and the second antenna.

[0110] It should be noted that, unlike the above-mentioned embodiment, when the antenna module also includes a left-handed material arranged between the first antenna and the second antenna, the first antenna and the second antenna include two isolation units, namely an isolation unit of a metamaterial and an isolation unit of a left-handed material, so as to improve the isolation between the first antenna and the second antenna through the isolation unit of the metamaterial and the isolation unit of the left-handed material.

[0111] It should also be noted that, unlike the single negative characteristic of the isolation unit of the metamaterial, the isolation unit of the left-handed isolation has a double negative characteristic, wherein the single negative characteristic means that one of the two parameters of the equivalent dielectric constant and the equivalent magnetic permeability is negative and the other is positive; the double negative characteristic means that both the equivalent dielectric constant and the equivalent magnetic permeability are negative.

[0112] Optionally, in one embodiment of the present application, the isolation unit of the left-handed material can be set between the at least two isolation units and the first antenna, or between the at least two isolation units and the second antenna, or partially between the at least two isolation units and the first antenna, or partially between the at least two isolation units and the second antenna. The present application does not limit this and it depends on the specific circumstances.

[0113] In summary, in the antenna module provided in the embodiment of the present application, the isolation unit is composed of a substrate and a metal patch, has a simple structure, and its size in the longitudinal direction is not higher than that of the first antenna and / or the second antenna, and does not require additional space in the longitudinal direction. The structure has a small size, is convenient for formation in the gap inside the electronic device, is easy to process, has low cost, and has broad application prospects and commercial value.

[0114] Moreover, the antenna module provided in the embodiment of the present application can achieve functions such as improving the isolation between antennas within a specific working frequency band, improving the horizontal plane radiation dead angle, and complementarity of the main and auxiliary antenna fields by periodically arranging the isolation units at a certain interval to construct an isolation element between the first antenna and the second antenna, and at the same time is beneficial to the stable improvement of the throughput performance of the entire wireless system.

[0115] In addition, in the antenna module provided in the embodiment of the present application, the isolation unit does not need to be grounded, has almost no effect on the antenna efficiency, and has a wider operating frequency band.

[0116] In addition, the present application also provides an electronic device, such as Figure 10-12As shown, the electronic device includes an antenna module, the antenna module includes a first antenna 10 and a second antenna 20 arranged at intervals, and a metamaterial array arranged between the first antenna 10 and the second antenna 20; in this embodiment, the metamaterial array can convert the propagation form of at least part of the electromagnetic waves radiated by the first antenna 10 and / or the second antenna 20 received into evanescent waves, so as to isolate the target radiation signal between the first antenna 10 and the second antenna 20. It should be noted that in this embodiment, the target radiation signal can be a high-frequency signal, a low-frequency signal, or a signal of a specific frequency band, which is not limited in this application and depends on the specific situation. It should also be noted that in actual application, the antenna module can change the frequency band corresponding to the target radiation signal by changing the size of the isolation unit, the distance between adjacent isolation units, and / or the number of isolation units arranged between the first antenna and the second antenna. This application does not limit this and depends on the specific situation.

[0117] In this embodiment, if Fig.13 As shown, Fig.13 for Fig.11 A local enlarged view shows that at least one of the two adjacent isolation units 30 in the metamaterial array is provided with a parasitic branch structure 301 toward the other side, so that an equivalent capacitance is introduced between the adjacent isolation units 30 through the parasitic branch structure 301 to reduce the resonant frequency, thereby reducing the size of the antenna module under the premise that the resonant frequency of the antenna module is fixed, which is conducive to the miniaturization of the antenna module.

[0118] It should be noted that, in this embodiment, the antenna module may be the antenna module provided by any of the above embodiments. Since the relevant contents of the antenna module have been described in detail in the above embodiments, they will not be described in detail here.

[0119] Optionally, in one embodiment of the present application, the electronic device includes a display portion consisting of a shell and a display screen, and the antenna module is arranged in a storage space formed by the display portion. It should be noted that in this embodiment, at least the shell constituting the storage space is made of an insulating material, so that the antenna module can radiate electromagnetic waves outward through the insulating material area, or receive electromagnetic waves transmitted from the outside; or, the storage space has an opening, so that the antenna module can radiate electromagnetic waves outward through the opening, or receive electromagnetic waves transmitted from the outside.

[0120] It should be noted that, in this embodiment, the substrate of the isolation unit of the antenna module can reuse the insulating part in the electronic device, and the metal patch in the isolation unit can be directly printed on the insulating part inside the electronic device. It can also have its own substrate. This application does not limit this, and it depends on the specific situation.

[0121] Specifically, based on the above embodiments, in one embodiment of the present application, the display part can be the display part of a tablet computer, the display part of a mobile phone, or the display part of a laptop computer, etc., that is, in this embodiment, the electronic device can be a tablet computer, a mobile phone, a laptop computer, etc., which includes an electronic device including a display screen and an antenna module.

[0122] Optionally, in one embodiment of the present application, the housing includes a metal housing, and the portion of the housing corresponding to the signal transmission path of the antenna module is an insulating housing or an opening to improve the metal texture of the electronic device, but the present application does not limit this, and it depends on the specific situation. Optionally, in this embodiment, the first antenna and the second antenna can be directly electrically connected to the metal housing to achieve grounding of the first antenna and the second antenna.

[0123] In another embodiment of the present application, the electronic device includes 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 accommodating space formed between the two rotating shafts so that the relative rotation of the first body and the second body will not affect the antenna performance of the electronic device.

[0124] Specifically, in one embodiment of the present application, the electronic device may be a laptop computer, but the present application is not limited to this. In other embodiments of the present application, the electronic device may be other electronic devices including a first body, a second body and a rotating shaft, depending on the specific circumstances.

[0125] It should be noted that, in the electronic device, within the accommodation space, the isolation unit in the antenna module can be centrally arranged in the second direction, such as Fig.11 As shown, it can also be set close to one side, such as Fig.12 As shown, this application does not limit this and the specific circumstances will depend on the circumstances.

[0126] On the basis of any of the above embodiments, in one embodiment of the present application, a parasitic branch structure is provided at least at one end of the isolation unit of the metamaterial array in a first direction to form an equivalent capacitance between two adjacent isolation units, and the first direction is a direction in which at least two isolation units are arranged to form a metamaterial array to form an equivalent capacitance between two adjacent isolation units, thereby reducing the resonant frequency of the antenna module, thereby enabling the size of the antenna module to be smaller while fixing the resonant frequency of the antenna module, which is conducive to the miniaturization of the antenna module.

[0127] Based on any of the above embodiments, in one embodiment of the present application, when electric resonance occurs, the metamaterial array generates a negative equivalent dielectric constant characteristic within the target resonant frequency band, thereby constructing a transmission stopband within a specific frequency band, converting the electromagnetic clutter coupled into the isolation unit into an evanescent wave, thereby significantly improving the isolation between the first antenna and the second antenna, so as to isolate the target radiation signal between the first antenna and the second antenna.

[0128] In another embodiment of the present application, the at least two isolation units form a metamaterial array. When electric resonance occurs, the metamaterial array generates a negative equivalent dielectric constant characteristic within the target resonant frequency band. At the same time, since its equivalent magnetic permeability is positive, that is, an electrically negative characteristic is achieved, a transmission stop band is constructed within a specific frequency band, and the electromagnetic clutter coupled into the isolation unit is converted into an evanescent wave, thereby significantly improving the isolation between the first antenna and the second antenna, so as to better isolate the target radiation signal between the first antenna and the second antenna.

[0129] It should be noted that in the above embodiments, the target resonant frequency band and the target radiation signal have a corresponding relationship. Optionally, in one embodiment of the present application, the target resonant frequency band and the target radiation signal have the same frequency band. In another embodiment of the present application, the target resonant frequency band and the target radiation signal have a mapping relationship. The present application does not limit this and it depends on the specific circumstances.

[0130] On the basis of any of the above embodiments, in one embodiment of the present application, the isolation unit includes a sub-wavelength structure composed of a substrate and a metal patch arranged on the substrate, so that the isolation unit is a metamaterial structure, which reduces the size of the antenna module and is conducive to the miniaturization of the antenna module. Moreover, the isolation unit provided in the embodiment of the present application is composed of a substrate and a metal patch, and has a simple structure.

[0131] Optionally, in one embodiment of the present application, the metal patch is an I-shaped structure patch, so that on the basis of realizing the antenna resonance performance through the self-resonance structure of the I-shaped structure patch, the antenna resonance performance is realized through the coupling between adjacent I-shaped structure patches, and then the longitudinal height of the metal patch is significantly reduced while the lateral width of the metal patch remains unchanged, so that the antenna module can be accommodated in some electronic devices with a smaller antenna setting space. It should be noted that, in this embodiment, the lateral width of the metal patch is the width of the metal patch in the first direction, and the longitudinal height of the metal patch is the height of the metal patch in the second direction. When the parts of the metal patch are located in the same plane, the second direction is perpendicular to the first direction.

[0132] In another embodiment of the present application, the substrate is an absorbing material, so as to reduce interference between the first antenna and the second antenna and increase isolation between the first antenna and the second antenna by absorbing electromagnetic waves radiated by the first antenna and / or the second antenna.

[0133] Based on any of the above embodiments, in one embodiment of the present application, the isolation unit is flexible, so that when the isolation unit is accommodated inside the electronic device, it can be bent according to the accommodation space inside the electronic device to achieve conformity with the electronic device.

[0134] Optionally, based on the above embodiments, in one embodiment of the present application, the substrate is a flexible medium, so that when the isolation unit is accommodated inside the electronic device, it can be bent according to the accommodation space inside the electronic device to achieve conformity with the electronic device. However, the present application does not limit this. In other embodiments of the present application, the substrate can also be a non-flexible medium, but has a shape that matches the accommodation space in the electronic device, depending on the specific situation.

[0135] On the basis of any of the above embodiments, in one embodiment of the present application, the metal patch includes: a first branch and a second branch arranged at intervals along a second direction, the second direction being perpendicular to the first direction; a third branch connecting the first branch and the second branch in the second direction; wherein the distance between the connection position of the third branch with the first branch and the opposite ends of the first branch in the first direction is greater than zero, and the distance between the connection position of the third branch with the second branch and the opposite ends of the second branch in the first direction is greater than zero, so that the opposite ends of the first branch in the first direction have a parasitic branch structure, and the opposite ends of the second branch in the first direction have a parasitic branch structure, so that an equivalent capacitor can be formed between the first branches in adjacent isolation units, and an equivalent capacitor can be formed between the second branches in adjacent isolation units to reduce the resonant frequency. Under the premise that the resonant frequency is fixed, the size of the isolation unit is reduced, which is suitable for the development of miniaturization of antenna modules.

[0136] Optionally, based on the above embodiments, in one embodiment of the present application, the third branch includes a first part, a second part and a third part connected in sequence, wherein the first part and the third part extend along the second direction, and the second part extends along the first direction to increase the length of the third branch, thereby increasing the equivalent inductance of the isolation unit.

[0137] Optionally, in one embodiment of the present application, the width of the second part in the second direction is smaller than the width of the first part or the third part in the first direction, so as to increase the length of the third branch node under the premise that the connection position between the first part and the first branch node and the connection position between the third part and the second branch node are fixed, thereby increasing the equivalent inductance of the isolation unit.

[0138] Optionally, in one embodiment of the present application, the size of the isolation unit in the longitudinal direction is smaller than the size of the first antenna in the longitudinal direction, so that the isolation unit does not occupy additional space in the longitudinal direction, thereby minimizing the size of the antenna module in the longitudinal direction.

[0139] It should be noted that in the above embodiments, the isolation unit of the metamaterial is insulated from zero potential, that is, the isolation unit is suspended and not grounded, so as to improve the antenna performance of the antenna module without transmitting the received electromagnetic waves to the ground, thereby hardly affecting the antenna efficiency.

[0140] Moreover, in the electronic device provided in the embodiment of the present application, the antenna module uses at least two isolation units to isolate the target radiation signal between the first antenna and the second antenna, which also helps to optimize the horizontal radiation field of the first antenna and the second antenna, improve the radiation dead angle problem of the traditional antenna module, and enhance the complementarity of the far-field radiation field of the first antenna and the second antenna, thereby facilitating the improvement of the throughput performance of the antenna module. It should be noted that throughput refers to the amount of data successfully transmitted per unit time for a network, device, port, virtual circuit or other facility.

[0141] In summary, in the electronic device provided in the embodiment of the present application, the isolation unit is composed of a substrate and a metal patch, has a simple structure, and its size in the longitudinal direction is not higher than the size of the first antenna and / or the second antenna, and no additional space in the longitudinal direction is required. The structure has a small size, which is convenient for formation in the gap inside the electronic device, and is easy to process, low cost, and has broad application prospects and commercial value.

[0142] Moreover, in the electronic device provided in the embodiment of the present application, the antenna module constructs an isolation element by periodically arranging the isolation units at a certain interval between the first antenna and the second antenna, which can achieve functions such as improving the isolation between antennas within a specific working frequency band, improving the horizontal plane radiation dead angle, and complementing the field patterns of the main and auxiliary antennas, and is also beneficial to the stable improvement of the throughput performance of the entire wireless system.

[0143] In addition, in the electronic device provided in the embodiment of the present application, the isolation unit does not need to be grounded, has almost no effect on the antenna efficiency, and has a wider operating frequency band.

[0144] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0145] It should be noted that in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. The same figure marks throughout the embodiments of the specification identify the same structure. It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such articles or equipment. In the absence of more restrictions, the elements limited by the sentence "including one..." do not exclude the existence of other identical elements in the article or equipment including the above elements.

[0146] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An antenna module, comprising: The antenna unit comprises a first antenna and a second antenna arranged at an interval; At least two isolation units, disposed between the first antenna and the second antenna, for converting 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, so as to isolate the target radiation signal between the first antenna and the second antenna; Wherein, at least one of two adjacent isolation units among the at least two isolation units is provided with a parasitic branch structure facing the other.

2. The antenna module according to claim 1, wherein: The at least two isolation units form a metamaterial array, and when electrical resonance occurs, the metamaterial array generates a characteristic of a negative equivalent dielectric constant within a target resonance frequency band, so as to isolate a target radiation signal between the first antenna and the second antenna; and / or, A parasitic branch structure is provided at at least one end of the isolation unit in a first direction to form an equivalent capacitance between two adjacent isolation units, and the first direction is a direction in which at least two isolation units are arranged to form a metamaterial array.

3. The antenna module according to claim 1 or 2, wherein: The isolation unit includes a sub-wavelength structure consisting of a substrate and a metal patch disposed on the substrate; and, The metal patch is an I-shaped patch, and / or the substrate is an absorbing material or a flexible medium, and the isolation unit is flexible.

4. The antenna module according to claim 3, wherein: The metal patch comprises: The first branches and the second branches are arranged at intervals along a second direction, wherein the second direction is perpendicular to the first direction; a third branch connecting the first branch and the second branch in the second direction; Among them, the distance between the connection position of the third branch and the first branch to the opposite ends of the first branch in the first direction is greater than zero, and the distance between the connection position of the third branch and the second branch to the opposite ends of the second branch in the first direction is greater than zero.

5. The antenna module according to claim 4, wherein: The third branch comprises a first part, a second part and a third part which are connected in sequence, wherein the first part and the third part extend along the second direction, and the second part extends along the first direction; and / or, There is a first distance between the second portion and the first branch, and there is a second distance between the second portion and the second branch, and the first distance is the same as or different from the second distance; and / or, A width of the second portion in the second direction is smaller than a width of the first portion or the third portion in the first direction.

6. The antenna module according to claim 1, wherein: The size of the isolation unit is smaller than the wavelength of the electromagnetic wave generated by the first antenna or the second antenna, and the structural size of the isolation unit is 6.0±0.2mm×5.0±0.2mm; and / or, 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 0.6±0.05 mm; and / or, The isolation unit can isolate signals of the first antenna and / or the second antenna in a frequency band of 5.15 to 5.85 GHz and / or signals in a frequency band of 5.925 to 7.125 GHz.

7. The antenna module according to claim 1, wherein: The first antenna is a PIFA antenna, the second antenna is a PIFA antenna, and the F directions of the first antenna and the second antenna are opposite; and / or, The antenna module also includes a left-handed material arranged between the first antenna and the second antenna, which is used to deflect the transmission direction of the electromagnetic waves generated by the first antenna or the second antenna or destroy the interference of the electromagnetic waves to improve the isolation between the first antenna and the second antenna.

8. An electronic device, comprising an antenna module, the antenna module comprising a first antenna and a second antenna arranged at an interval, and a metamaterial array arranged between the first antenna and the second antenna; The metamaterial array is capable of converting 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, so as to isolate the target radiation signal between the first antenna and the second antenna; in, At least one of two adjacent isolation units in the metamaterial array is provided with a parasitic branch structure facing the other.

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, The isolation unit of the metamaterial array is provided with a parasitic branch structure at at least one end in a first direction to form an equivalent capacitance between two adjacent isolation units, wherein the first direction is a direction in which at least two isolation units are arranged to form the metamaterial array.

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, When electric resonance occurs, the metamaterial array generates a characteristic of a negative equivalent dielectric constant within a target resonance frequency band, so as to isolate a target radiation signal between the first antenna and the second antenna.

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