Antenna module and electronic equipment

Abstract

The embodiment of the invention provides an antenna module and electronic equipment, the antenna module comprises an antenna unit and an isolation structure, and the antenna unit comprises a first antenna and a second antenna which are arranged at an interval; the isolation structure is arranged between the first antenna and the second antenna, the isolation structure comprises at least one first isolation unit, and the first isolation unit comprises at least two branch structures arranged at intervals; wherein the branch structure enables the first isolation unit to present a negative refractive index characteristic in a working frequency band of the antenna unit, so as to isolate a target radiation signal between the first antenna and the second antenna.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and in particular to antenna modules and electronic devices. Background Art

[0002] With the rapid development of integrated circuits, the thinness and lightness of electronic devices such as laptops has become a trend. However, this design has also greatly compressed the space for antenna arrangement. Cavity antennas can utilize the existing space inside electronic devices, without the need for additional space to arrange antennas, and are suitable for use in space-constrained devices. The space utilization advantage of cavity antennas helps electronic devices to simplify the architecture and reduce the thickness of the entire device, which is conducive to the miniaturization of equipment. In addition, cavity antennas can be used in metal shell devices to solve the problem of antenna arrangement in metal shells and improve the product texture. At present, electronic devices have a situation where multiple communication frequency bands coexist. For example, 2.4G and 5~7G frequency bands coexist. Improving the antenna performance of cavity antennas in multiple frequency bands is one of the problems that need to be solved urgently. Summary of the invention

[0003] In view of this, an embodiment of the present disclosure provides an antenna module and an electronic device.

[0004] According to a first aspect of the present disclosure, there is provided an antenna module, comprising:

[0005] The antenna unit comprises a first antenna and a second antenna arranged at an interval;

[0006] an isolation structure, arranged between the first antenna and the second antenna, the isolation structure comprising at least one first isolation unit, the first isolation unit comprising at least two branch structures arranged at intervals;

[0007] The branch structure enables the first isolation unit to present a negative refractive index characteristic within the working frequency band of the antenna unit, so as to isolate the target radiation signal between the first antenna and the second antenna.

[0008] According to a second aspect of the present disclosure, there is provided an electronic device, comprising a device body having a receiving space and an antenna module disposed in the receiving space, wherein the antenna module comprises:

[0009] The antenna unit comprises a first antenna and a second antenna arranged at an interval;

[0010] an isolation structure, arranged between the first antenna and the second antenna, the isolation structure comprising at least one first isolation unit, the first isolation unit comprising at least two branch structures arranged at intervals;

[0011] The branch structure enables the first isolation unit to present a negative refractive index characteristic within the working frequency band of the antenna unit, so as to isolate the target radiation signal between the first antenna and the second antenna;

[0012] The device body includes a display part consisting of a shell and a display screen and / or a host part consisting of a shell and an input device, and the antenna module is arranged in a receiving space formed by the display part or the host part, wherein at least part of the shell constituting the receiving space is made of insulating material or the receiving space has an opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the antenna module provided in the embodiment of the present disclosure Figure 1 .

[0014] Figure 2a is an equivalent circuit diagram of the first isolation unit.

[0015] Figure 2b for Figure 1 An enlarged view of the first isolation unit in FIG.

[0016] Figure 3 Schematic diagram 2 of the antenna module provided in an embodiment of the present disclosure.

[0017] Figure 4 Schematic diagram of the antenna module provided in the embodiment of the present disclosure Figure 3 .

[0018] Figure 5 Schematic diagram of the antenna module provided in the embodiment of the present disclosure Figure 4 .

[0019] Figure 6 for Figure 1 Partial schematic diagram of the isolation structure.

[0020] Figures 7a to 7c Schematic diagram of the antenna module provided in the embodiment of the present disclosure Figure 5 .

[0021] Figure 8 Schematic diagram of an electronic device provided by an embodiment of the present disclosure Figure 1 .

[0022] Fig. 9 Schematic diagram 2 of an electronic device provided for an embodiment of the present disclosure.

[0023] Fig.10 Schematic diagram of an antenna module including a through hole array provided in an embodiment of the present disclosure Figure 1 .

[0024] Fig.11Schematic diagram 2 of an antenna module including a through-hole array provided for an embodiment of the present disclosure.

[0025] Fig.12 Schematic diagram of an antenna module including a through hole array provided in an embodiment of the present disclosure Figure 3 .

[0026] Fig.13 Schematic diagram of an antenna module including a through hole array provided in an embodiment of the present disclosure Figure 4 .

[0027] Fig.14 Schematic diagram of an antenna module including a through hole array provided in an embodiment of the present disclosure Figure 5 .

[0028] Fig.15 Schematic diagram of an antenna module including a through hole array provided in an embodiment of the present disclosure Figure 6 .

[0029] Fig.16a and Fig.16b Schematic diagram seven of an antenna module including a through-hole array provided for an embodiment of the present disclosure.

[0030] Fig.17 for Fig. 9 A partial schematic diagram of the electronic device shown.

[0031] Fig.18a and Fig.18b Antenna patterns of two antenna modules provided in the embodiments of the present disclosure.

[0032] Fig.19 The isolation of the two antenna modules provided in the embodiments of the present disclosure. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present disclosure, the exemplary embodiments of the present disclosure will be described in more detail below with reference to the relevant drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the specific embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0034] Generally, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or plural usage, depending at least in part on the context.

[0035] In order to thoroughly understand the present disclosure, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present disclosure. The following examples are used to illustrate the present disclosure, but are not used to limit the scope of the present disclosure.

[0036] The present application provides an antenna module for forming a cavity antenna. The antenna module is suitable for use in electronic devices to transmit and receive electromagnetic waves. The electronic devices may be laptop computers, tablet computers, car computers, wearable devices, mobile phones, etc.

[0037] Figure 1 Schematic diagram of the antenna module provided in the embodiment of the present disclosure Figure 1 . refer to Figure 1 The antenna module 100 includes an antenna unit 200 and an isolation structure 300. The antenna module 100 includes a first antenna 210 and a second antenna 220 that are spaced apart. The isolation structure 300 is disposed between the first antenna 210 and the second antenna 220. The isolation structure 300 includes at least one first isolation unit 310. The first isolation unit 310 includes at least two branch structures 311 and 312 that are spaced apart. The branch structures 311 and 312 enable the first isolation unit to exhibit a negative refractive index characteristic within the working frequency band of the antenna unit so as to isolate the target radiation signal between the first antenna 210 and the second antenna 220.

[0038] For example, the operating frequency band can be a certain frequency or a frequency band. The target radiation signal is all or part of the signal within the operating frequency band. That is, the isolation structure can completely isolate the signal between the two antennas or only isolate part of it. For example, the operating frequency band of the antenna unit can be the 2.4 GHz frequency band, or it can be at least part of the frequency band within the 5-7 GHz frequency band, such as the 5 GHz frequency band. When the operating frequency band of any antenna in the antenna unit is the 2.4 GHz frequency band, the target radiation signal can be all or part of the signal in the 2.4 GHz frequency band. When the operating frequency band of the antenna unit is the 5 GHz frequency band, the target radiation signal can be all or part of the signal in the 5 GHz frequency band.

[0039] In the antenna module provided by the embodiment of the present disclosure, two branch structures of the first isolation unit are arranged at intervals and face each other, forming an equivalent capacitor. The equivalent capacitor connected in series in the isolation structure can make the isolation structure present a negative refractive index characteristic within the working frequency band of the antenna unit, suppress the coupling effect of the electromagnetic waves between the first antenna and the second antenna, and change the antenna field spatial distribution of the first antenna and the second antenna, thereby improving the isolation of the target radiation signal.

[0040] The first isolation unit 310 may include a plurality of branch structures arranged side by side. The present disclosure takes the first isolation unit 310 including two branch structures, namely the first branch 311 and the second branch 312 as an example for explanation. In other embodiments, the first isolation unit 310 may also include three, four, etc. branches, and every two adjacent branches may form an equivalent capacitor.

[0041] In some embodiments, reference Figure 1 The antenna module 100 further includes a substrate 400 having a thickness, and the substrate 400 has a first surface and a second surface opposite to each other in the thickness direction. The material of the substrate 400 can be an insulating material and / or an absorbing material. The substrate 400 can be a rigid substrate 400 or a flexible substrate 400, and the present disclosure does not impose too many restrictions on this.

[0042] For example, the antenna unit 200 is disposed on the substrate 400, wherein the first antenna 210 and the second antenna 220 may be disposed on the same surface of the substrate 400. For ease of description, the following description is made by taking the first antenna 210 and the second antenna 220 being disposed on the first surface of the substrate 400 as an example. Figure 1 A first surface of the substrate 400 is shown.

[0043] The first antenna 210 and the second antenna 220 are arranged at intervals along the first direction D1, and the first direction is parallel to the first surface of the substrate 400. By way of example, the first antenna 210 includes an antenna body 211, a first arm 212 and a second arm 213, wherein one end of the first arm 212 is connected to the antenna body 211, and the other end is connected to the antenna ground; one end of the second arm 213 is connected to the antenna body 211, and the other end is connected to the RF module. By way of example, the first arm 212 and the second arm 213 are arranged opposite to each other along the extension direction (first direction D1) of the antenna body 211. In a specific embodiment, one of the first arm 212 and the second arm 213 is connected to one end of the antenna body 211, and the other one is connected to the main body of the antenna body 211, so that the first antenna 210 is roughly in an inverted F shape.

[0044] For example, the second antenna 220 has the same structure as the first antenna 210. In some specific embodiments, the first antenna 210 and the second antenna 220 may be symmetrically arranged, that is, the free end of the antenna body 211 of the first antenna 210 and the free end of the antenna body 211 of the second antenna 220 are close to each other, or far away from each other. Figure 1As shown, the free end of the antenna body 211 of the first antenna 210 and the free end of the antenna body 211 of the second antenna 220 are close to each other. In other embodiments, the first antenna 210 and the second antenna 220 may also be placed in other ways. In addition, the first antenna 210 and the second antenna 220 may also have other structures. The present disclosure does not impose too many restrictions on the structure and positional relationship of the first antenna 210 and the second antenna 220.

[0045] For example, the working frequency band of the antenna unit 200 includes the 2.4 GHz frequency band and / or at least part of the 5-7 GHz frequency band. The first antenna 210 can transmit and receive electromagnetic waves in the 2.4 GHz frequency band and the 5-7 GHz frequency band, and the second antenna 220 can transmit and receive electromagnetic waves in the 2.4 GHz frequency band and the 5-7 GHz frequency band.

[0046] For example, the isolation structure 300 is disposed on the substrate 400. Along the first direction D1, the isolation structure 300 is located between the first antenna 210 and the second antenna 220, but the disclosure does not limit the specific location of the isolation structure 300 on the substrate 400 between the first antenna 210 and the second antenna 220.

[0047] For example, the isolation structure 300 may be disposed entirely on the first surface, or entirely on the second surface, or the isolation structure 300 may be disposed partially on the first surface and partially on the second surface. In other examples, the substrate 400 further includes a third surface and a fourth surface that are parallel to and opposite to the first direction D1, the third surface connecting the first surface and the second surface, and the fourth surface connecting the first surface and the second surface. The isolation structure 300 may be disposed on one or more of the first surface, the second surface, the third surface, and the fourth surface of the substrate 400. In addition, the isolation structure 300 may also penetrate the substrate 400.

[0048] exist Figure 1 In the illustrated embodiment, the first isolation unit 310 in the isolation structure 300 and the antenna unit 200 are located on the same surface of the substrate 400, that is, on the first surface. In other embodiments, the first isolation unit 310 and the antenna unit 200 may also be located on different surfaces of the substrate 400, for example, the first isolation unit 310 is located on the second surface.

[0049] In some embodiments, the first isolation unit 310 includes a first branch 311 and a second branch 312 that are spaced apart, and a third branch 313 connecting the first branch 311 and the second branch 312; a series equivalent capacitor and a parallel equivalent inductor can be formed between the first branch 311, the second branch 312 and the third branch 313, so that the first isolation unit 310 has a negative refractive index characteristic within the working frequency band of the antenna unit 200.

[0050] like Figure 2a As shown, the equivalent capacitor C formed by the first branch 311 and the second branch 312 is connected in series in the equivalent circuit corresponding to the isolation structure 300, and the third branch 313 is an equivalent inductor L. The third branch 313 can be coupled to the antenna ground, thereby being connected in parallel in the equivalent circuit. The series equivalent capacitor C and the parallel equivalent inductor L can make the isolation structure 300 have a negative equivalent dielectric constant and / or a negative equivalent magnetic permeability in a specific frequency band, thereby presenting a negative refractive index characteristic.

[0051] For example, the conductive characteristics of the isolation structure 300 for electromagnetic waves in a specific frequency band can be tested to obtain the equivalent capacitance and equivalent inductance of the isolation structure 300, thereby calculating whether the isolation structure 300 has a negative refractive index in the specific frequency band. It should be noted that the equivalent circuit corresponding to the isolation structure 300 may also include other components, such as equivalent inductors connected in series and equivalent capacitors connected in parallel.

[0052] In some embodiments, the first branch 311 and the second branch 312 have the same length. The length of a branch refers to the size of the branch along the extension direction. Figure 1 , the first branch 311 and the second branch 312 extend along the second direction D2, the second direction D2 is perpendicular to the first direction D1 and parallel to the first surface, and the first branch 311 and the second branch 312 have a length along the second direction D2. In this embodiment, the first branch 311 and the second branch 312 together form an equivalent capacitor. In the process of obtaining the isolation structure 300 corresponding to a specific frequency band, the length of the first branch 311 and the second branch 312 are adjusted at the same time, and the capacitance of the equivalent capacitor can be adjusted. In other embodiments, the lengths of the first branch 311 and the second branch 312 may also be different.

[0053] In some embodiments, the first branch 311 and the second branch 312 have the same size parameters. For example, the size parameters include the length of the branch along the extension direction and the width perpendicular to the extension direction. Figure 1 The first branch 311 and the second branch 312 also have a width along the first direction D1. In this embodiment, the length and width of the first branch 311 and the second branch 312 are the same, which can further simplify the variables of the isolation structure and quickly determine the size parameters of the isolation structure 300.

[0054] In some embodiments, the first branch 311 and the second branch 312 have a first size parameter, and the third branch 313 has a second size parameter, and the first size parameter is different from the second size parameter.

[0055] The dimensional parameters of the third branch 313 include a length along the first direction D1 and a width along the second direction D2. The first dimensional parameter is different from the second dimensional parameter, including: the length of the third branch 313 is different from the first branch 311 (the second branch 312), and / or the width of the third branch 313 is different from the first branch 311 (the second branch 312). In the process of determining the isolation structure 300, the first dimensional parameter and / or the second dimensional parameter can be adjusted accordingly according to the actually measured equivalent inductance value and equivalent capacitance value. Such an adjustment strategy is more targeted and conducive to quickly determining the isolation structure 300. Based on this adjustment strategy, the first dimensional parameter is usually different from the second dimensional parameter.

[0056] The first branch 311 , the second branch 312 , and the third branch 313 have a first positional relationship therebetween.

[0057] In some embodiments, reference Figure 1 The third branch node 313 may be located at one side of the first branch node 311 and the second branch node 312 along the second direction D2, and the length of the third branch node 313 along the first direction D1 may be greater than the distance between the side wall of the first branch node 311 away from the second branch node 312 and the side wall of the second branch node 312 away from the first branch node 311. That is, the third branch node 313 protrudes from the second branch node 312 along the positive direction of the first direction D1, and protrudes from the first branch node 311 along the negative direction of the first direction D1.

[0058] Figure 2b Shows Figure 1 Schematic diagram of the first isolation unit in FIG. In some specific embodiments, such as Figure 2b As shown, the first branch 311 and the second branch 312 include a first end 311a and a second end 311b relatively arranged in the extension direction (second direction D2), and the third branch 313 includes a third end 313a and a fourth end 313b relatively arranged in the extension direction (first direction D1), wherein the first end 311a of the first branch 311 is connected to the third branch 313 between the center line m perpendicular to the extension direction and the third end 313a, and the first end 311a of the second branch 312 is connected to the third branch 313 between the center line m and the fourth end 313b.

[0059] Furthermore, the first branch 311 and the second branch 312 may be symmetrically arranged with the center line m of the third branch 313 perpendicular to the extension direction as a symmetry axis.

[0060] For example, the first branch 311 and the second branch 312 are connected to the antenna ground of the antenna module at one end away from the third branch 313. That is, the second end 311b of the first branch 311 and the second branch 312 are connected to the antenna ground of the antenna module, so that the equivalent inductance is grounded and connected in parallel in the equivalent circuit.

[0061] In other embodiments, Figure 3 As shown, the main parts of the first branch 311 and the second branch 312 are respectively connected to the third end 313a and the fourth end 313b of the third branch 313, and the main part is the part between the first end 311a and the second end 311b, so that the first isolation unit 310 is generally H-shaped.

[0062] For example, the first end 311 a and the second end 311 b of the first branch 311 and the second branch 312 along the extension direction are connected to the antenna ground of the antenna module, so that the equivalent inductance is connected in parallel in the equivalent circuit.

[0063] In some other embodiments, Figure 4 As shown, the ends of the first branch 311 and the second branch 312 are respectively connected to the opposite ends of the third branch 313 in the extension direction and are arranged on the same side of the third branch 313; wherein the first branch 311, the second branch 312 and the third branch 313 form a groove structure. In other words, the third branch 313 is located on one side of the first branch 311 and the second branch 312 along the second direction D2, and the length of the third branch 313 along the first direction D1 is equal to the distance between the side wall of the first branch 311 away from the second branch 312 and the side wall of the second branch 312 away from the first branch 311, so that the third branch 313 is flush with the second branch 312 along the positive direction of the first direction D1, and is flush with the first branch 311 along the negative direction of the first direction D1, thereby forming a groove structure.

[0064] For example, the third branch 313 of the slot structure, and / or an end of the first branch 311 and the second branch 312 away from the third branch 313 , is connected to the antenna ground of the antenna module.

[0065] In some embodiments, the isolation structure 300 includes a metamaterial array formed by a plurality of first isolation units 310, and the plurality of first isolation units 310 form a plurality of equivalent capacitors connected in series and a plurality of equivalent inductors connected in parallel, so that the metamaterial array exhibits negative equivalent permittivity and / or negative magnetic permeability characteristics within the target frequency band, thereby exhibiting negative refractive index characteristics. When the antenna unit 200 is in operation, the target radiation signal between the first antenna 210 and the second antenna 220 can be isolated.

[0066] See also Figure 1, the multiple first isolation units 310 in the isolation structure 300 are arranged along the first direction D1 to form a metamaterial array. For example, the metamaterial array can be located on the first surface of the substrate 400, or on the second surface of the substrate 400. In the metamaterial array, in addition to the first branch 311 and the second branch 312 in a single first isolation unit 310 forming a series equivalent capacitor, a series equivalent capacitor can also be formed between two adjacent first isolation units 310. For example, the first branch 311 of a first isolation unit 310 forms an equivalent capacitor with the second branch 312 of the adjacent first isolation unit 310.

[0067] The metamaterial array formed by multiple first isolation structures 300 increases the number of equivalent capacitors in series, so in the process of determining the isolation structure, the number of adjustable parameters increases, the range of equivalent capacitance increases, and the adjustment accuracy can be improved, which is more conducive to debugging the isolation structure corresponding to the working frequency band of the antenna unit. Ultimately, the isolation structure loaded with equivalent capacitance in series and equivalent inductance in parallel exhibits negative equivalent dielectric constant and / or negative magnetic permeability characteristics within the target frequency band, so that the isolation structure exhibits negative refractive index characteristics within the target frequency band. When the antenna unit 200 is emitting a target radiation signal, the isolation structure can suppress the electromagnetic coupling between the first antenna 210 and the second antenna 220, change the spatial distribution of the antenna field pattern, and improve the isolation between the two antennas.

[0068] For example, there is a corresponding relationship between the target frequency band and the target radiation signal. The target frequency band is the same as the frequency band of the target radiation signal, or there is a mapping relationship between the target frequency band and the frequency band of the target radiation signal, for example, the target frequency band includes the frequency band of the target radiation signal. For example, the target frequency band includes the working frequency band of the antenna unit, for example, the target frequency band includes the 2.4 GHz frequency band, and / or the target frequency band includes at least part of the 5 to 7 GHz frequency band.

[0069] In the metamaterial array, two adjacent first isolation units 310 have a second positional relationship.

[0070] In some embodiments, Figure 1 , Figure 3 and Figure 4 As shown, the first branch 311 and the second branch 312 of the same first isolation unit 310 are arranged adjacent to each other and are spaced apart from another first isolation unit 310 .

[0071] In other embodiments, see Figure 5In every two adjacent first isolation units 310, the first branch 311 of one first isolation unit 310 is located between the first branch 311 and the second branch 312 of the other first isolation unit 310. In this way, the equivalent circuit of the isolation structure can generate staggered capacitance, increase the adjustable parameters in the isolation structure, and help improve the isolation of the antenna.

[0072] Continue to see Figure 5 The ends of the first branch 311 and the second branch 312 of the first isolation unit 310 are respectively connected to the opposite ends of the third branch 313 in the extension direction and are arranged on the same side of the third branch 313, and the first branch 311, the second branch 312 and the third branch 313 form a groove structure. The substrate 400 includes a first edge 400a and a second edge 400b arranged opposite to each other along the second direction D2, and the groove structures are alternately arranged at the first edge 400a and the second edge 400b of the substrate 400, and the notches of the groove structures arranged at the first edge 400a and the second edge 400b are staggered and face each other.

[0073] Specifically, the metamaterial array includes the first first isolation unit 310, the second first isolation unit 310, ..., the Nth first isolation unit 310 arranged in sequence along the first direction D1, where N is a positive integer; wherein the third branch 313 of the odd-numbered first isolation unit 310 is close to the first edge 400a, and the third branch 313 of the even-numbered first isolation unit 310 is close to the second edge 400b, so that the notch direction of the odd-numbered first isolation unit 310 is opposite to the notch direction of the even-numbered first isolation unit 310. wherein the first branch 311 and the second branch 312 of the even-numbered first isolation unit 310 extend into the notches of the two odd-numbered first isolation units 310 adjacent thereto, respectively.

[0074] In the isolation structure provided in this embodiment, the slots of the slot-shaped structures arranged at the first edge 400a and the second edge 400b are staggered toward each other. On the one hand, staggered capacitance is introduced into the equivalent circuit of the isolation structure, and the adjustable parameters in the isolation structure are increased, which is conducive to quickly obtaining the isolation structure corresponding to the working frequency band of the antenna unit; on the other hand, this periodic structure can periodically load series capacitance and parallel inductance in the equivalent circuit, which is easy to combine a negative dielectric constant and a negative magnetic permeability, so that the isolation structure has a negative refractive index characteristic, thereby improving the isolation of the two antennas.

[0075] For example, the third branch 313 of the slot structure located at the second edge 400b is connected to the antenna ground of the antenna module. For example, the third branch 313 of the slot structure located at the first edge 400a is connected to the ground wire of the antenna module, so that the equivalent inductance is connected in parallel to the equivalent circuit corresponding to the isolation structure.

[0076] Figure 6 for Figure 1 Schematic diagram of the isolation structure in Figure 6 In some embodiments, the first branch 311 has a first length a, the second branch 312 has a third length b, and the third branch 313 has a second length c, wherein the first length a, the third length b, and the second length c have a first corresponding relationship with the wavelength λ of the target frequency band.

[0077] For example, the first length a, the third length b, the second length c and the wavelength λ of the target frequency band may satisfy a first theoretical relationship:

[0078]

[0079] Wherein, Er is the relative dielectric constant of the substrate 400. It should be noted that the first theoretical relationship is a theoretical derivation formula, and in actual applications, the total length of the first length a, the third length b, and the second length c may deviate from the theoretical value due to the influence of the surrounding structure. However, the first length a, the third length b, and the second length c can be preliminarily determined based on the first theoretical relationship. Combined with simulation, experimental verification and other means, the first length a, the third length b, and the second length c can be adjusted to quickly determine the appropriate size parameters so that the isolation structure has a negative refractive index characteristic within the working frequency band of the antenna unit, and the first theoretical relationship can be corrected to obtain the first corresponding relationship. Afterwards, the first length a, the third length b, and the second length c can be determined according to the first corresponding relationship.

[0080] For example, the first length a and the third length b are also related to the size of the substrate 400. The first length a and the third length b are smaller than the height of the substrate 400 along the second direction D2. The second length c of the third branch 313 can have a larger adjustment range to adjust the refractive index of the isolation structure 300.

[0081] In some embodiments, the distance between two adjacent first isolation units 310 in the metamaterial array has a second corresponding relationship with the wavelength λ of the target frequency band.

[0082] For example, the distance between the two first isolation units 310 refers to the distance d between the center lines m of the third branches 313 of the two first isolation units perpendicular to the extension direction. The distance d and the wavelength λ of the target frequency band can satisfy the second theoretical relationship:

[0083]

[0084] Wherein, Er is the relative dielectric constant of the substrate 400. It should be noted that the second theoretical relationship is a theoretical derivation formula, and the distance d may deviate in actual applications, but the distance d can be preliminarily determined based on the second theoretical relationship, and the distance d can be adjusted in combination with simulation, experimental verification, etc. to quickly determine the appropriate distance, and the second theoretical relationship can be corrected to obtain the second corresponding relationship. Afterwards, the distance d between adjacent first isolation units can be determined based on the second corresponding relationship.

[0085] In some embodiments, see Figure 7a to Figure 7b The isolation structure 300 includes a plurality of first isolation units 310 disposed on a first surface 410 of a substrate 400 and a second isolation unit 320 disposed on a second surface 420 of the substrate 400. The second isolation unit 320 includes a fifth branch 321 and a sixth branch 322 spaced apart along a first direction D1, and a fourth branch 323 connected to the fifth branch 321 and the sixth branch 322.

[0086] In this embodiment, adding the second isolation unit 320 can increase the adjustable parameters in the isolation structure, which is conducive to adjusting the isolation structure to match the working frequency band of the antenna unit.

[0087] For example, the fifth branch 321 and the sixth branch 322 are respectively arranged opposite to the first branch 311 and the second branch 312 of the first isolation unit 310 via the substrate 400. That is, the orthogonal projection of the fifth branch 321 on the first surface overlaps with at least a portion of the first branch 311, and the orthogonal projection of the sixth branch 322 on the first surface overlaps with at least a portion of the second branch 312. In this way, an equivalent capacitor can be formed between the first branch 311 and the fifth branch 321, and an equivalent capacitor can be formed between the second branch 312 and the sixth branch 322, so that more staggered capacitors are generated in the equivalent circuit, which is beneficial to improve the isolation of the two antennas. In some specific embodiments, the fifth branch 321 and the sixth branch 322 can be respectively arranged completely opposite to the first branch 311 and the second branch 312 of the first isolation unit 310.

[0088] For example, the size parameters of the fifth branch 321 may be different from the size parameters of the first branch 311, and the size parameters of the sixth branch 322 may be different from the size parameters of the second branch 312. Figure 7a and Figure 7b In the embodiment, the length of the fifth branch 321 is different from the length of the first branch 311 , and the length of the sixth branch 322 is different from the length of the second branch 312 .

[0089] In some embodiments, the substrate 400 has a first side and a second side opposite to each other along the second direction D2, the edge of the first surface 410 and the second surface 420 located on the first side is a first edge (e.g., 400a), and the edge of the first surface 410 and the second surface 420 located on the second side is a second edge (e.g., 400b), wherein the third branch 313 and the fourth branch 323 are located at different edges, that is, one of the third branch 313 and the fourth branch 323 is located at the first edge, and the other is located at the second edge. For example, Figure 7a and Figure 7b In the embodiment, the third branch 313 is located at the first edge of the first surface 410, and the fourth branch 323 is located at the second edge of the second surface 420. In other embodiments, the third branch 313 may be located at the second edge of the first surface 410, and the fourth branch 323 may be located at the first edge of the second surface 420.

[0090] In some embodiments, the first isolation unit 310 and the second isolation unit 320 are electrically connected via a first conductive line 330. For example, Figure 7c As shown, the first wire 330 passes through the first surface 410 and the second surface 420 of the substrate 400, that is, the first wire 330 is a conductive via. In other embodiments, the first wire 330 can extend along the third surface or the fourth surface of the substrate 400 to connect the first isolation unit 310 and the second isolation unit 320.

[0091] In some embodiments, Figure 7a and Figure 7c As shown, the first isolation unit 310 also includes a seventh branch 314 which is arranged opposite to a partial branch segment of the fourth branch 323 and connects the ends of the first branch 311 and the second branch 312. Each first isolation unit 310 is electrically connected through a first wire 330 arranged between the seventh branch 314 and the fourth branch 323.

[0092] An equivalent capacitor can be formed between the seventh branch 314 and the fourth branch 323, further increasing the complexity of the isolation structure, thereby increasing the adjustable parameters of the isolation structure, and facilitating adjustment of the isolation structure to match the working frequency band of the antenna unit.

[0093] For example, Figure 7b As shown, the fourth branches 323 of the plurality of second isolation units 320 may be connected to each other. In other embodiments, the fourth branches 323 of the plurality of second isolation units 320 may also be spaced apart from each other.

[0094] For example, the seventh branch 314 and the fourth branch 323 are connected to the antenna ground. In addition, the third branch 313 can also be connected to the antenna ground.

[0095] In this embodiment, by adding a second isolation unit 320 to the second surface 420 and connecting the second isolation unit 320 to the antenna ground, the inductance to the ground can be increased. In addition, by electrically connecting the first isolation unit 310 and the second isolation unit 320 through the first wire, the inductance to the ground and the capacitance to the ground can be further increased, and the introduction of the second isolation unit and the first wire can increase the adjustable parameters in the isolation structure, increase the adjustable range of the equivalent capacitance value and the equivalent resistance value, and improve the adjustment accuracy, which is conducive to adjusting the isolation structure to match the working frequency band of the antenna unit and is conducive to improving the isolation of the two antennas. Moreover, the complex isolation structure can also introduce other advantageous circuits, such as a resonant circuit formed by capacitors and inductors, to further improve the isolation of the antenna.

[0096] The present disclosure also provides an electronic device, Figure 8 A schematic diagram of an electronic device provided by an embodiment of the present disclosure, such as Figure 8 As shown, the electronic device 10 includes a device body 11 having a receiving space 12 and an antenna module 100 arranged in the receiving space 12, the antenna module 100 includes: an antenna unit 200 and an isolation structure 300, the antenna module includes a first antenna 210 and a second antenna 220 arranged at intervals; the isolation structure 300 is arranged between the first antenna 210 and the second antenna 220, the isolation structure 300 includes at least one first isolation unit 310, and the first isolation unit 310 includes at least two branch structures 311 and 312 arranged at intervals; wherein the branch structures 311 and 312 make the first isolation unit 310 present a negative refractive index characteristic within the working frequency band of the antenna unit 200, so as to isolate the target radiation signal between the first antenna 210 and the second antenna 220; wherein the device body 11 includes a display part composed of a shell and a display screen and / or a host part composed of a shell and an input device, the antenna module 100 is arranged in the receiving space 12 formed by the display part or the host part, wherein at least part of the shell constituting the receiving space 12 is made of an insulating material or the receiving space 12 has an opening.

[0097] The electronic device 10 may be a laptop computer, a tablet computer, a car computer, a wearable device, a mobile phone or other electronic device that needs to transmit and receive electromagnetic waves. Fig. 9 A schematic notebook computer is shown as an example for explanation.

[0098] Fig. 9The electronic device schematically shown includes a display portion 20 and a host portion 30. In other embodiments, the control circuit of the electronic device 10 can be integrated in the housing of the display portion 20 without having to separately set up the host portion 30, such as a mobile phone, a tablet computer, etc. Correspondingly, the antenna module 100 is arranged in the accommodation space of the display portion. In other embodiments, the electronic device 10 may also include only the host portion 30 without the display portion 20, such as a vehicle-mounted device, etc. Correspondingly, the antenna module 100 is arranged in the accommodation space of the host portion 30.

[0099] See also Fig. 9 The display part 20 includes a housing 21 and a display screen 22, and the host part 30 includes a housing 31 and an input device 32. The host part and the display part are rotatably connected.

[0100] The display screen 22 can be used to display images, etc. The display screen 22 can be a flat screen or a curved screen. For example, the housing 21 of the display portion 20 may include a frame and an upper cover, and the frame may be detachably or non-detachably fixed to one side of the upper cover. For example, the frame may be fixed to the upper cover by adhesive. In other embodiments, the frame and the upper cover may also be an integrally formed structure. The display screen 22 may be detachably or non-detachably fixed to a side of the frame away from the upper cover. For example, the display screen 22 may be fixed to the frame by adhesive, and the display screen 22 is arranged opposite to the upper cover. The display screen 22 and the housing 21 including the upper cover and the frame may together enclose a storage space for the display portion 20.

[0101] The input device 32 may be used to input text, voice, and various commands. The input device 32 may include a keyboard, a touch pad, a touch screen, and various input / output interfaces. Fig. 9 In the schematically shown laptop computer, the input device 32 may be a keyboard surface including a keyboard and a touchpad. For example, the housing 31 of the host part 30 may include a frame and a rear housing, and the rear housing may be detachably fixed to one side of the frame. For example, the rear housing may be fixed to the frame by a buckle. The input device 32 may be detachably or non-detachably fixed to a side of the frame away from the rear housing, and the input device 32 is arranged opposite to the rear housing. The input device 32 and the housing 31 including the rear housing and the frame may together enclose a storage space for the host part 30.

[0102] The antenna module 100 is disposed in the accommodation space formed by the host part 30, wherein at least part of the housing constituting the accommodation space is made of insulating material or the accommodation space has an opening. The antenna module 100 is disposed at the housing having insulating material or at the opening. The antenna module 100 and the accommodation cavity constitute a cavity antenna, and the housing having insulating material or the opening is used for electromagnetic waves to enter the cavity antenna from the external space, and to transmit electromagnetic waves to the external space.

[0103] For example, the antenna module 100 may be the antenna module 100 shown in any of the above embodiments of the present disclosure, which will not be described in detail here.

[0104] In some embodiments, the isolation structure 300 includes a metamaterial array formed by multiple first isolation units 310, and the multiple first isolation units can form equivalent capacitance in series and equivalent inductance in parallel. When the antenna unit is in a working state, the metamaterial array exhibits negative equivalent dielectric constant and / or negative magnetic permeability characteristics within the target frequency band to isolate the target radiation signal between the first antenna and the second antenna.

[0105] Fig.10 Schematic diagram of an antenna module including a through hole provided in an embodiment of the present disclosure Figure 1 In some embodiments, see Fig.10 The antenna module 100 includes a substrate 400 having a thickness, and the first isolation unit 310 is disposed on a first surface and / or a second surface of the substrate 400 that are oppositely disposed in the thickness direction.

[0106] Illustratively, the antenna unit 200 is disposed on a substrate 400 .

[0107] The substrate 400 is provided with through holes 510 matching the metamaterial array, and the through holes 510 penetrate the first surface and the second surface of the substrate 400, and can be used to dissipate heat for the electronic device 10. The control circuit components of the electronic device 10 can be arranged in the accommodation space formed by the host part 30, and the through holes 510 are used to transfer the heat generated by the components of the control circuit to the outside.

[0108] In this embodiment, the cavity antenna is combined with the ventilation structure of the electronic device, and the storage space can be used as a radiation cavity and a component storage cavity at the same time, thereby improving the space utilization of the device. In addition, the substrate 400 provided with the ventilation structure is reused, and no additional structure is required to carry the antenna unit and the isolation structure, which can reduce the occupation of the device space, facilitate the miniaturization of the electronic device and reduce the cost.

[0109] In some embodiments, see Fig.10 The substrate 400 is provided with a through hole array matching the metamaterial array, and the through hole array includes at least one row of through holes 510 arranged along the first direction D1; the first antenna 210 and the second antenna 220 are arranged opposite to each other along the first direction D1. The first branch 311 and the second branch 312 of the first isolation unit 310 are respectively located on both sides of a group of through holes 510 along the first direction, and the group of through holes 510 includes one or more through holes 510.

[0110] exist Fig.10In the embodiment, the first branch 311 and the second branch 312 are respectively located on both sides of a through hole 510 along the first direction D1, that is, there is a through hole 510 between the first branch 311 and the second branch 312. In other embodiments, there may be multiple through holes 510 between the first branch 311 and the second branch 312. For example, Fig.11 In the embodiment, two through holes 510 exist between the first branch 311 and the second branch 312 .

[0111] In two adjacent first isolation units 310, one through hole 510 or a plurality of through holes 510 may be provided between the second branch 312 of one first isolation unit 310 and the first branch 311 of the other first isolation unit 310. Fig.10 A through hole 510 may be provided between the second branch 312 of one first isolation unit 310 and the first branch 311 of another first isolation unit 310. Fig.11 Two through holes 510 may be provided between the second branch 312 of one first isolation unit 310 and the first branch 311 of another first isolation unit 310 .

[0112] In some embodiments, the first isolation unit 310 also includes: a third branch 313 connecting the first branch 311 and the second branch 312; wherein the third branch 313 is located on one side of a row of through holes 510 along the second direction D2, the second direction D2 is perpendicular to the first direction D1, and both are parallel to the first surface of the substrate 400.

[0113] See also Fig.10 and Fig.11 The through hole array includes a row of through holes 510, and the third branch 313 is located on one side of the row of through holes 510 along the second direction and connects the first branch 311 and the second branch 312. The size parameters of the first branch 311, the second branch 312 and the third branch 313 can be referred to above and will not be repeated here.

[0114] A first positional relationship among the first branch 311 , the second branch 312 , and the third branch 313 .

[0115] In some embodiments, reference Fig.10 and Figure 1 The first branch 311 and the second branch 312 include a first end and a second end relatively arranged in the second direction, and the third branch 313 includes a third end and a fourth end relatively arranged in the first direction; wherein the first end of the first branch 311 is connected to the third branch 313 between the center line perpendicular to the extension direction and the third end, the first end of the second branch 312 is connected to the third branch 313 between the center line and the fourth end, and the second ends of the first branch 311 and the second branch 312 are connected to the antenna ground of the antenna module.

[0116] In some embodiments, reference Fig.11 and Figure 4 The first end of the first branch 311 is connected to the third end of the third branch 313, the first end of the second branch 312 is connected to the fourth end of the third branch 313, and the second ends of the first branch 311 and the second branch 312 are connected to the antenna ground of the antenna module.

[0117] In some embodiments, reference Fig.12 and Figure 5 The ends of the first branch 311 and the second branch 312 are respectively connected to the opposite ends of the third branch 313 in the extension direction and are arranged on the same side of the third branch 313; wherein the first branch 311, the second branch 312 and the third branch 313 form a groove structure, and the groove structure is alternately arranged on the first edge and the second edge of the substrate 400, and the grooves of the groove structure arranged on the first edge and the second edge are staggered and face each other.

[0118] In some embodiments, see Fig.13 and Fig.14 The through hole array includes multiple rows of through holes 510, and the through holes 510 in two adjacent rows are aligned along the second direction D2; the first branch 311 and the second branch 312 pass through at least two rows of through holes 510; wherein the third branch 313 is located on one side of at least two rows of through holes 510 along the second direction D2, or the third branch 313 is located between two adjacent rows of through holes 510.

[0119] It should be noted that when discussing the first branch 311 and the second branch 312 passing through at least two rows of through holes 510, there are no excessive restrictions on the end positions of the first branch 311 and the second branch 312. Fig.13 As shown, the first ends of the first branch 311 and the second branch 312 pass through the first row of through holes 510 and extend to the first edge of the substrate 400, and the second ends of the first branch 311 and the second branch 312 pass through the second row of through holes 510 and extend to the second edge of the substrate 400. In other embodiments, the first end may also be located between two adjacent through holes 510 in the first row of through holes 510 without completely passing through the first row of through holes 510, or the second end may also be located between two adjacent through holes 510 in the second row of through holes 510 without completely passing through the second row of through holes 510.

[0120] Continue to see Fig.13 and Figure 3 The third branch 313 is located between two adjacent rows of through holes 510 and connects the first branch 311 and the second branch 312, so that the first isolation unit 310 is substantially H-shaped. The first branch 311 and the second branch 312 are connected to the antenna ground of the antenna module.

[0121] like Fig.14 As shown, the first ends of the first branch 311 and the second branch 312 completely pass through the first row of through holes 510, and the second ends of the first branch 311 and the second branch 312 are located between two adjacent through holes 510 in the second row of through holes 510 without completely passing through the second row of through holes 510. The third branch 313 is connected to the first ends of the first branch 311 and the second branch 312. In other embodiments, the second ends may also completely pass through the second row of through holes 510.

[0122] In some embodiments, see Fig.15 The through-hole array includes a plurality of rows of through-holes 510, and the through-holes 510 in two adjacent rows are staggered; the first branch 311 includes a plurality of first branch segments 3111, 3112, and each first branch segment 3111 / 3112 passes through a row of through-holes 510; the second branch 312 includes a plurality of second branch segments 3121, 3122, and each second branch segment passes through a row of through-holes 510 and is opposite to a first branch segment; the number of the third branch 313 is at least one, and the third branch 313 is located between two adjacent rows of through-holes 510 and connects two pairs of first branch segments and second branch segments passing through the two rows of through-holes 510.

[0123] like Fig.15 As shown, the through hole array includes two rows of through holes 510, and the two rows of through holes 510 are staggered. The first branch 311 includes two first branch segments 3111 and 3112, the first branch segment 3111 passes through the first row of through holes, and the first branch segment 3112 passes through the second row of through holes; the second branch 312 includes two second branch segments 3121 and 3122, the second branch segment 3121 passes through the first row of through holes, and the second branch segment 3122 passes through the second row of through holes. The third branch 313 is located between the first row of through holes 510 and the second row of through holes 510, and connects the two first branch segments 3111 and 3112 and the two second branch segments 3121 and 3122.

[0124] For example, one end of the two first branch segments 3111 and 3112 and one end of the two second branch segments 3121 and 3122 away from the third branch segment 313 are connected to the antenna ground.

[0125] In some embodiments, reference Fig.16a , Fig.16b and Figures 7a to 7cThe isolation structure 300 includes a plurality of first isolation units 310 arranged on the first surface of the substrate 400 and a second isolation unit 320 arranged on the second surface of the substrate 400, and the first isolation unit 310 and the second isolation unit 320 are electrically connected through a first wire 330; the second isolation unit 320 includes a fourth branch 323 and a fifth branch 321 and a sixth branch 322 connected to the fourth branch 323 and arranged opposite to the first branch 311 and the second branch 312 of the first isolation unit 310 respectively, the first isolation unit 310 also includes a seventh branch 314 arranged opposite to a partial branch segment of the fourth branch 323 and connecting the ends of the first branch 311 and the second branch 312, and each first isolation unit 310 is electrically connected through a first wire 330 arranged between the seventh branch 314 and the fourth branch 323. Among them, the fifth branch 321 and the sixth branch 322 are respectively located on both sides of a group of through holes 510 along the first direction D1, and a group of through holes 510 includes one or more through holes 510; the seventh branch 314 and the third branch 313 are located on both sides of one or more rows of through holes 510 along the second direction D2.

[0126] It should be noted that the present disclosure does not impose too many restrictions on the morphology of the first branch 311 to the seventh branch 314. Any structure similar to the morphology of the first branch 311 to the seventh branch 314 shown in the drawings of the present disclosure is within the protection scope of the present disclosure. For example, the edge of any branch of the first branch 311 to the seventh branch 314 may be a straight line or a curve. The portion of any branch used to connect to the antenna ground may be appropriately widened to Figure 1 For example, the ends of the first branch 311 and the second branch 312 away from the third branch 313 may be appropriately widened to improve the reliability of the ground connection.

[0127] In addition, it should be noted that the first branch 311 to the seventh branch 314 and the antenna unit in the isolation structure 300 can be a conductive film attached to the surface of the substrate 400. The conductive film can be made of metals such as copper, silver, aluminum, and gold.

[0128] In some embodiments, the main body 30 and the display part 20 are connected by a rotating structure (not shown in the figure). The substrate 400 is arranged on the side of the housing of the host part 30 close to the rotating structure, and the substrate 400 is made of insulating material and is a part of the housing; or the side of the housing of the host part 30 close to the rotating structure has an opening, and the substrate 400 is arranged at the opening.

[0129] Fig.17 for Fig. 9 A partial schematic diagram of the electronic device shown. Fig.17The side of the frame of the main body 30 of the laptop computer, which is located below the rotating structure, is shown. For example, the substrate 400 including the antenna module 100 can be an insulating material and is part of the housing. In another example, the substrate 400 can also be installed at the opening of the housing. The substrate 400 is used to set the first surface of the antenna unit away from the accommodation space, that is, facing the outside.

[0130] Fig.18a for Fig.17 The antenna pattern of the antenna module 100 in the electronic device shown in the figure works in the 2.4 GHz frequency band. Fig.18b The antenna pattern of the antenna unit 200 without the isolation structure 300 working in the 2.4 GHz frequency band. Fig.18a and Fig.18b It can be seen that Fig.18a The antenna pattern of the first antenna 210 and the antenna pattern of the second antenna 220 are far away from each other, wherein the first antenna 210 is offset toward the 0 angle, corresponding to Fig.17 The antenna pattern of the second antenna 220 is offset to the left at an angle of 180, corresponding to Fig.17 The antenna patterns of the two antennas clearly radiate to the left and right sides of the laptop, and the field patterns of the two antennas are in opposite directions, forming a complementary relationship.

[0131] contrast Fig.18a and Fig.18b It can be seen that the isolation structure can change the spatial distribution of the antenna pattern of the first antenna 210 and the second antenna 220, thereby improving the isolation between the two antennas. Fig.18b , Fig.18a The antenna field pattern has fewer depressions, which can improve the antenna's ability to transmit and receive signals.

[0132] Fig.19 The curve S2 in Fig.17 The relationship between the isolation between the first antenna 210 and the second antenna 220 of the antenna module 100 shown in FIG. 1 and the frequency, and the curve S1 is the relationship between the isolation between the first antenna 210 and the second antenna 220 without the isolation structure 300 and the frequency. Fig.19 As shown, when the antenna unit 200 operates at 5.3 GHz, the isolation of the antenna unit including the non-isolated structure in curve S1 is about -11 dB, and the isolation of the antenna unit including the isolated structure in curve S2 is about -22 dB. That is, by adding the isolation structure, the isolation of the antenna unit 200 can be improved by 11 dB when it operates at 5.3 GHz.

[0133] It should be noted that the various embodiments provided in the present disclosure belong to the same concept; the various technical features in the technical solutions recorded in the various embodiments can be arbitrarily combined without conflict.

[0134] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the protection scope of the present disclosure. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. An antenna module, comprising: The antenna unit comprises a first antenna and a second antenna arranged at an interval; an isolation structure, arranged between the first antenna and the second antenna, the isolation structure comprising at least one first isolation unit, the first isolation unit comprising at least two branch structures arranged at intervals; The branch structure enables the first isolation unit to present a negative refractive index characteristic within the working frequency band of the antenna unit, so as to isolate the target radiation signal between the first antenna and the second antenna.

2. The antenna module according to claim 1, wherein: The first isolation unit includes a first branch and a second branch that are spaced apart, and a third branch connecting the first branch and the second branch; An equivalent capacitor connected in series and an equivalent inductor connected in parallel can be formed between the first branch, the second branch and the third branch, so that the first isolation unit has a negative refractive index characteristic within the working frequency band of the antenna unit; and / or, The first branch and the second branch have a first size parameter, the third branch has a second size parameter, the first size parameter is different from the second size parameter, and the first branch, the second branch and the third branch have a first positional relationship.

3. The antenna module according to claim 1 or 2, wherein the isolation structure comprises a metamaterial array formed by a plurality of first isolation units, and an equivalent capacitance in series and an equivalent inductance in parallel can be formed between two adjacent first isolation units, and when the antenna unit is in a working state, the metamaterial array exhibits a negative equivalent dielectric constant and / or a negative magnetic permeability in a target frequency band, so as to isolate the target radiation signal between the first antenna and the second antenna; and / or, The antenna module further includes a substrate having a thickness, and the first isolation unit is arranged on a first surface and / or a second surface of the substrate that are arranged opposite to each other in a thickness direction; and / or, Two adjacent first isolation units have a second positional relationship.

4. The antenna module according to claim 3, wherein the first branch and the second branch comprise a first end and a second end disposed oppositely in the extension direction, the third branch comprises a third end and a fourth end disposed oppositely in the extension direction, and the extension direction of the first branch is perpendicular to the extension direction of the third branch; in, The first end of the first branch is connected to the third branch between the center line perpendicular to the extension direction and the third end, the first end of the second branch is connected to the third branch between the center line and the fourth end, and the second ends of the first branch and the second branch are connected to the antenna ground of the antenna module; and / or, The main parts of the first branch and the second branch are connected to the third end and the fourth end of the third branch respectively, and the main part is the part between the first end and the second end.

5. The antenna module according to claim 3, wherein the ends of the first branch and the second branch are respectively connected to the opposite ends of the third branch in the extension direction, and are arranged on the same side of the third branch; in, The first branch, the second branch and the third branch form a groove structure, The groove structures are alternately arranged at a first edge and a second edge of the substrate, and the groove openings of the groove structures arranged at the first edge and the second edge are staggered toward each other; and / or, An equivalent interleaved capacitance can be formed between the first branch and the second branch of two adjacent slot-shaped structures; and / or, The third branch of the slot structure located at the second edge is connected to the antenna ground of the antenna module.

6. The antenna module according to claim 3, wherein the isolation structure comprises a plurality of first isolation units disposed on a first surface of a substrate and a second isolation unit disposed on a second surface of the substrate, wherein the first isolation unit and the second isolation unit are electrically connected via a first wire; The second isolation unit includes a fourth branch, and a fifth branch and a sixth branch connected to the fourth branch and respectively arranged opposite to the first branch and the second branch of the first isolation unit, the first isolation unit also includes a seventh branch arranged opposite to a part of the branch segments of the fourth branch and connecting the ends of the first branch and the second branch, and each first isolation unit is electrically connected via a first wire arranged between the seventh branch and the fourth branch; and / or, Equivalent capacitance can be formed between the first branch and the fifth branch, and between the second branch and the sixth branch.

7. An electronic device, comprising a device body having a storage space and an antenna module arranged in the storage space, wherein the antenna module comprises: The antenna unit comprises a first antenna and a second antenna arranged at an interval; an isolation structure, arranged between the first antenna and the second antenna, the isolation structure comprising at least one first isolation unit, the first isolation unit comprising at least two branch structures arranged at intervals; The branch structure enables the first isolation unit to present a negative refractive index characteristic within the working frequency band of the antenna unit, so as to isolate the target radiation signal between the first antenna and the second antenna; The device body includes a display part consisting of a shell and a display screen and / or a host part consisting of a shell and an input device, and the antenna module is arranged in a receiving space formed by the display part or the host part, wherein at least part of the shell constituting the receiving space is made of insulating material or the receiving space has an opening.

8. The electronic device according to claim 7, wherein: The device body comprises a main body part and a display part which are rotatably connected, and the antenna module is arranged in a receiving space formed by the main body part; The isolation structure includes a metamaterial array formed by a plurality of first isolation units, and a series equivalent capacitance and a parallel equivalent inductance can be formed between two adjacent first isolation units. When the antenna unit is in a working state, the metamaterial array exhibits characteristics of a negative equivalent dielectric constant and / or a negative magnetic permeability within a target frequency band, so as to isolate a target radiation signal between the first antenna and the second antenna; and / or, The antenna module further includes a substrate having a thickness, and the first isolation unit is arranged on a first surface and / or a second surface of the substrate that are arranged opposite to each other in a thickness direction; The substrate is provided with through holes matching the metamaterial array, and the through holes can be used to dissipate heat for the electronic device.

9. The electronic device according to claim 8, wherein: A through hole array is provided on the substrate, and the through hole array includes at least one row of through holes arranged along a first direction; The first antenna and the second antenna are arranged opposite to each other along the first direction; The first branch and the second branch of the first isolation unit are respectively located on both sides of a group of through holes along the first direction, and the group of through holes includes one or more through holes; and / or, The first isolation unit further includes a third branch connecting the first branch and the second branch, wherein the third branch is located on one side of a row of through holes along a second direction, and the second direction is perpendicular to the first direction; And / or, there is a first corresponding relationship between the lengths of the first branch, the second branch and the third branch and the wavelength of the target frequency band; And / or, there is a second corresponding relationship between the distance between two adjacent first isolation units in the metamaterial array and the wavelength of the target frequency band.

10. The electronic device according to claim 9, wherein: The through hole array comprises a plurality of rows of through holes, and the through holes in two adjacent rows are aligned along the second direction; The first branch node and the second branch node pass through at least two rows of through holes, wherein the third branch node is located on one side of the at least two rows of through holes along the second direction, or the third branch node is located between two adjacent rows of through holes; and / or, The through hole array comprises a plurality of rows of through holes, and the through holes in two adjacent rows are staggered; The first branch section includes a plurality of first branch section segments, each of which passes through a row of through holes; the second branch section includes a plurality of second branch section segments, each of which passes through a row of through holes and is opposite to a first branch section; The number of the third branch is at least one, and the third branch is located between two adjacent rows of through holes and connects two pairs of first branch segments and second branch segments passing through the two rows of through holes; and / or, The isolation structure comprises a plurality of first isolation units arranged on a first surface of the substrate and a second isolation unit arranged on a second surface of the substrate, wherein the first isolation units and the second isolation units are electrically connected via a first wire; The second isolation unit includes a fourth branch, and a fifth branch and a sixth branch connected to the fourth branch and respectively arranged opposite to the first branch and the second branch of the first isolation unit, the first isolation unit also includes a seventh branch arranged opposite to a part of the branch segments of the fourth branch and connecting the ends of the first branch and the second branch, and each first isolation unit is electrically connected via a first wire arranged between the seventh branch and the fourth branch; Wherein, the fifth branch node and the sixth branch node are respectively located on both sides of a group of through holes along the first direction, and the group of through holes includes one or more through holes; The seventh branch node and the third branch node are located on two sides of one or more rows of through holes along the second direction.

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