Antenna module and electronic equipment

Abstract

The invention provides an antenna module and electronic equipment. The antenna module comprises a radiation part, a feed part and a metal ground. The radiation part comprises a base body and a metasurface antenna layer arranged on the base body, the feed part comprises at least one dielectric layer and a feed structure arranged on the dielectric layer, the feed structure is conductively connected with the metasurface antenna layer, and the radiation part and the feed part are stacked. The metal ground is arranged on the bottom side surface of the feed part back to the radiation part. The radiation part of the antenna module comprises the metasurface antenna layer arranged on the substrate, and the metasurface antenna layer is matched with the substrate and the feed part, so that a plurality of resonance modes can be combined together, the working bandwidth of the antenna module is expanded, the dielectric constant of the substrate is equivalently increased, and the profile height of the antenna is reduced.

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 the fifth generation mobile communication technology (5G), electronic products have higher requirements for signal transmission, and the use of non-metallic materials such as glass and ceramics for electronic product shells has become a major trend. Since non-metallic shells such as glass and ceramics have high dielectric constants and loss tangent values, when combined with 5G millimeter wave terminal antennas, the radiation pattern of the antenna may deteriorate, the operating frequency band may shift, and the beam coverage may degrade. Summary of the invention

[0003] The present disclosure provides an antenna module and an electronic device to solve related technical problems.

[0004] An embodiment of the present disclosure provides an antenna module, including:

[0005] A radiation part, comprising a substrate and a metasurface antenna layer disposed on the substrate;

[0006] A feeding part, at least one dielectric layer and a feeding structure arranged on the dielectric layer; the feeding structure is conductively connected to the metasurface antenna layer; the radiation part and the feeding part are stacked;

[0007] The metal ground is arranged on the bottom side of the feeding part facing away from the radiation part.

[0008] Optionally, the metasurface antenna layer includes a plurality of radiation patches arranged on the substrate, and the radiation patches are arranged in an array.

[0009] Optionally, the metasurface antenna layer includes two rows of the radiation patches, each row is provided with two radiation patches; a first interval is formed between the radiation patches in the same row, and a second interval is formed between two rows of the radiation patches, and the lengths of the first interval and the second interval are the same.

[0010] Optionally, the shape of the radiation patch includes a rectangle.

[0011] Optionally, the substrate includes an outer surface located on the opposite side of the feeding part, and the supersurface antenna layer is arranged on the outer surface.

[0012] Optionally, the feeding part also includes a feeding connector; the feeding structure includes a first section, a second section and a third section; the first section includes a first end and a second end that are relatively arranged, and the second section and the third section extend in different directions from the first end; the second end is conductively connected to the feeding connector.

[0013] Optionally, the first section, the second section and the third section form a T-shaped structure.

[0014] Optionally, the second section and the third section are respectively provided with a fourth section at one end away from the first section, and the fourth section is connected to the supersurface antenna layer.

[0015] Optionally, the fourth section includes a stepped structure arranged along the extension direction.

[0016] Optionally, the feeding part includes two stacked dielectric layers; each dielectric layer is provided with the feeding structure, and extension directions of the first sections on the two dielectric layers are perpendicular to each other.

[0017] Optionally, the feed connector includes a first coaxial line and a second coaxial line; the metal ground is provided with a first avoidance ring centered on the first coaxial line and a second avoidance ring centered on the second coaxial line; the feed part is provided with a metallized through hole connecting the metal ground and one of the feed structures, and a metallized blind hole connecting the metal ground and another of the feed structures;

[0018] The first coaxial line is conductively connected to the second end of one of the feed structures through the metallized through-hole, and the second coaxial line is conductively connected to the second end of another of the feed structures through the metallized blind hole.

[0019] Optionally, the metal ground includes at least one hollow gap, and an extension direction of the hollow gap is perpendicular to one of the first sections.

[0020] Optionally, the metal ground includes two orthogonal hollow gaps.

[0021] Optionally, the material of the substrate includes glass.

[0022] According to a second aspect of the present disclosure, an electronic device is provided, comprising any antenna module described in the first aspect.

[0023] Optionally, the electronic device includes a back shell; the back shell includes an outer surface and an inner surface arranged opposite to each other, and at least a portion of the back shell serves as the substrate; the supersurface antenna layer is arranged on the outer surface, and the feeding part is assembled on the inner surface.

[0024] Optionally, the supersurface antenna layer is printed on the outer surface.

[0025] The technical solution provided by the present disclosure can at least achieve the following beneficial effects:

[0026] The radiation part of the antenna module disclosed in the present invention includes a metasurface antenna layer arranged on a substrate. The metasurface antenna layer can combine multiple resonant modes together by cooperating with the substrate and the feeding part, thereby expanding the working bandwidth of the antenna module, and equivalently increasing the dielectric constant of the substrate and reducing the cross-sectional height of the antenna.

[0027] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a schematic diagram of a three-dimensional structure of an antenna module in an exemplary embodiment of the present disclosure;

[0030] Figure 2 is a schematic diagram of an exploded structure of an antenna module in an exemplary embodiment of the present disclosure;

[0031] Figure 3 is a schematic cross-sectional structure diagram of an antenna module in an exemplary embodiment of the present disclosure;

[0032] Figure 4 is a schematic diagram of a three-dimensional structure of a feeding part in an exemplary embodiment of the present disclosure;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of a feeding part in another exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are only examples of devices and methods consistent with some aspects of the present disclosure.

[0035] The terms used in the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one, and will be separately described if only "one" is referred to. "Multiple" or "several" means two and more than two. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper", "top", "bottom" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0036] With the rapid development of the fifth generation mobile communication technology (5G), electronic products have higher requirements for signal transmission, and the use of non-metallic materials such as glass and ceramics for electronic product shells has become a major trend. Since non-metallic shells such as glass and ceramics have high dielectric constants and loss tangent values, when combined with 5G millimeter wave terminal antennas, the radiation pattern of the antenna may deteriorate, the operating frequency band may shift, and the beam coverage may degrade.

[0037] The present disclosure provides an antenna module. Figure 1 is a schematic diagram of a three-dimensional structure of an antenna module in an exemplary embodiment of the present disclosure, Figure 2 is a schematic diagram of an exploded structure of an antenna module in an exemplary embodiment of the present disclosure, Figure 3 is a schematic diagram of a cross-sectional structure of an antenna module in an exemplary embodiment of the present disclosure. Figure 1-Figure 3 As shown, the antenna module 1 includes a radiation part 11, a feeding part 12 and a metal ground 13. The radiation part 11 includes a substrate 111 and a super-surface antenna layer 112 arranged on the substrate 111, the feeding part 12 includes at least one dielectric layer 121 and a feeding structure 122 arranged on the dielectric layer 121, the feeding structure 122 is conductively connected to the super-surface antenna layer 112, and the radiation part 11 and the feeding part 12 are stacked. The metal ground 13 is arranged on the bottom side of the feeding part 12 facing away from the radiation part 11.

[0038] Since the radiation part 11 of the above-mentioned antenna module 1 includes a super-surface antenna layer 112 arranged on the substrate 111, the super-surface antenna layer 112 can combine multiple resonant modes together through cooperation with the substrate 111 and the feeding part 12, thereby expanding the working bandwidth of the antenna module 1, and equivalently increasing the dielectric constant of the substrate 111 and reducing the cross-sectional height of the antenna, thereby meeting the 5G millimeter wave broadband coverage requirements.

[0039] In the above embodiment, the metasurface antenna layer 112 includes a plurality of radiation patches 1121 arranged on the substrate 111, and the radiation patches 1121 are arranged in an array. The array patches are used as subunits of the metasurface antenna. By adjusting the size of the subunits and the spacing between the subunits, and selecting appropriate resonant modes, a miniaturized metasurface antenna radiator can be obtained to achieve radiation of energy to free space. Among them, the miniaturization of the metasurface antenna is achieved by utilizing a metasurface dispersion curve with width independence and high slope characteristics. It should be noted that the number of radiation patches 1121 can be 2, 3, 4 or more, and the present disclosure does not limit the number of radiation patches.

[0040] For example, the metasurface antenna layer 112 includes two rows of radiation patches 1121, each row is provided with two radiation patches 1121, a first interval is formed between the radiation patches 1121 in the same row, a second interval is formed between the two rows of radiation patches 1121, and the lengths of the first interval and the second interval are the same. That is, by using four symmetrical radiation patches 1121 as metasurface antenna radiators, an antenna structure that meets antenna performance and is miniaturized is obtained. In addition, when the lengths of the first interval and the second interval are the same, matching with dual-polarization feeding can be achieved. The sizes of the four radiation patches 1121 can be the same to enhance dual-polarization symmetry in dual-polarization feeding.

[0041] In other embodiments, in the application of a single-polarization-fed antenna, the lengths of the first interval and the second interval may be different. The sizes of the radiation patches 1121 may also be different.

[0042] In some embodiments, the shape of the radiation patch 1121 may be rectangular, circular, polygonal, irregular, etc. For example, the radiation patch 1121 may be square to provide structural convenience in the layout and feeding of the radiation patch 1121 .

[0043] It should be noted that the material of the above-mentioned metasurface antenna can be gold, silver, copper, etc., and the present disclosure is not limited to this. For example, the radiation patch 1121 as a metasurface antenna can be a copper-clad layer. The material of the substrate 111 can be glass, or it can be ceramic or other materials with required dielectric constants. When the material of the substrate 111 is glass, since the dielectric constant of the glass medium is relatively high, the metasurface antenna layer 112 can combine multiple resonant modes together, which equivalently increases the dielectric constant of the dielectric substrate and further reduces the overall profile height of the antenna.

[0044] In some embodiments, the substrate 111 includes an outer surface 1111 located on the opposite side of the feeding portion 12, and the metasurface antenna layer 112 is disposed on the outer surface 1111. The metasurface antenna layer 112 is disposed on the outer surface 1111 of the substrate 111, and the high dielectric constant characteristics of the substrate 111 and the metasurface structure can be used to increase the dielectric constant of the medium equivalently, thereby reducing the antenna profile height.

[0045] In some embodiments, Figure 3-Figure 5 As shown, the feeding part 12 also includes a feeding connector 123, and the feeding structure 122 includes a first section 1221, a second section 1222 and a third section 1223. The first section 1221 includes a first end and a second end that are oppositely arranged, and the second section 1222 and the third section 1223 extend from the first end in different directions, and the second end is conductively connected to the feeding connector 123. A differential structure is formed by the first section 1221, the second section 1222 and the third section 1223, and differential feeding is used to excite the corresponding metasurface resonance mode.

[0046] In the above embodiment, the first section 1221 , the second section 1222 and the third section 1223 may form a T-shaped structure, that is, the second section 1222 and the third section 1223 extend from the first end in opposite directions perpendicular to the first section 1221 .

[0047] The second section 1222 and the third section 1223 are respectively provided with a fourth section 1224 at one end away from the first section 1221, and the fourth section 1224 is connected to the metasurface antenna layer 112. The fourth section 1224 is connected to each part of the metasurface antenna layer 112 by using its own extension direction and length, so as to realize the feeding of the metasurface antenna. Among them, the fourth section 1224 may include a stepped structure arranged along the extension direction to improve the impedance matching performance and expand the bandwidth. The above-mentioned feeding structure 122 may be a microstrip line.

[0048] It should be noted that the above-mentioned metasurface antenna can adopt single polarization feeding or dual polarization feeding. When the metasurface antenna layer 112 adopts single polarization feeding, the feeding part 12 can include a dielectric layer 121 and a feeding structure 122 arranged on the dielectric layer 121.

[0049] When the metasurface antenna layer 112 adopts dual-polarization feeding, the feeding part 12 may include two stacked dielectric layers 121, each dielectric layer 121 is provided with a feeding structure 122, and the extension directions of the first sections 1221 on the two dielectric layers 121 are perpendicular to each other. Since different feeding structures 122 may overlap, the feeding structures 122 are placed on different dielectric layers 121, so that the heights of the two polarized feeding structures 122 to the metal ground 13 are different, thereby avoiding interference between the two feeding structures 122. Among them, the size and impedance matching of the above-mentioned feeding structure 122 need to be independently designed.

[0050] For the above-mentioned feeding scheme, the feeding connector 123 may include a first coaxial line 1231 and a second coaxial line 1232, the metal ground 13 is provided with a first avoidance ring 131 centered on the first coaxial line 1231 and a second avoidance ring 132 centered on the second coaxial line 1232, and the feeding part 12 is provided with a metallized through hole 125 connecting the metal ground 13 and a feeding structure 122, and a metallized blind hole 126 connecting the metal ground 13 and another feeding structure 122. The first coaxial line 1231 is conductively connected to the second end of one feeding structure 122 through the metallized through hole 125, and the second coaxial line 1232 is conductively connected to the second end of another feeding structure 122 through the metallized blind hole 126. Among them, the feeding structure 122 connected to the metallized through hole 125 can be located on the upper layer of the feeding structure 122 connected to the metallized blind hole 126, and the metallized through hole 125 needs to penetrate the dielectric layer 121 to connect with the feeding structure 122.

[0051] In other embodiments, the feeding connector 123 may further include a metal probe, so that the first coaxial line 1231 and the second coaxial line 1232 are conductively connected to the corresponding feeding structure 122 through the metal probe.

[0052] In addition, a prepreg 124 may be provided between two adjacent dielectric layers 121 , so that the adjacent dielectric layers 121 can be connected via the prepreg 124 .

[0053] In some embodiments, the metal ground 13 includes at least one hollow gap 133, and the extension direction of the hollow gap 133 is perpendicular to a first section 1221. When feeding, a magnetic current is generated at the hollow gap 133, which enhances the coupling of the feeding structure 122 to the metasurface antenna layer 112, and at the same time has the function of impedance matching adjustment, further expanding the antenna impedance bandwidth.

[0054] In the above embodiment, the metal ground 13 includes two orthogonal hollow gaps 133, so that the two polarized feeding matching structures do not affect each other and can enhance the coupling of the feeding structure 122 to the super-surface antenna layer 112.

[0055] The orthogonal hollow gap 133 may be located in the center of the antenna metal ground 13 and below the feeding structure 122. The metal ground 13 may be made of gold, silver, copper or other metals, which is not limited in the present disclosure.

[0056] The present disclosure further provides an electronic device, which includes the antenna module 1 mentioned above.

[0057] It should be noted that the above-mentioned electronic device can be a mobile phone, a tablet computer, a vehicle-mounted terminal, a wearable device, a medical terminal, etc., and the present disclosure does not limit this.

[0058] Since the radiation part 11 of the above-mentioned antenna module 1 includes a super-surface antenna layer 112 arranged on the substrate 111, the super-surface antenna layer 112 can combine multiple resonant modes together through cooperation with the substrate 111 and the feeding part 12, thereby expanding the working bandwidth of the antenna module 1, and equivalently increasing the dielectric constant of the substrate 111 and reducing the cross-sectional height of the antenna.

[0059] In some embodiments, the electronic device includes a rear shell, the rear shell includes an outer surface and an inner surface arranged opposite to each other, and at least a portion of the rear shell serves as a substrate 111. The metasurface antenna layer is disposed on the outer surface, and the feed portion 12 is assembled on the inner surface. Using the rear shell as the substrate 111 of the metasurface antenna layer can effectively utilize the housing structure of the electronic device, realize antenna miniaturization and low profile, and help improve antenna performance.

[0060] In the above embodiment, the metasurface antenna layer 112 can be printed on the outer surface or glued to the outer surface. The feeding part 12 can be assembled on the inner surface by gluing.

[0061] The material of the back shell can be glass, ceramic or other materials with the required dielectric constant. When the back shell material as the substrate is glass, since the dielectric constant of the glass medium is relatively high, the metasurface antenna layer 112 can combine multiple resonant modes together, which effectively increases the dielectric constant of the dielectric substrate and further reduces the overall profile height of the antenna.

[0062] Taking a mobile phone as an example, the back cover of the mobile phone is made of glass, and the glass back cover can be used as the base 111 of the antenna module 1 to realize the distribution of the metasurface antenna layer 112. The metasurface antenna located on the back cover can cooperate with the antenna at other positions of the mobile phone as a mobile phone communication antenna.

[0063] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. An antenna module, characterized in that: include: A radiation part, comprising a substrate and a metasurface antenna layer disposed on the substrate; A feeding part, at least one dielectric layer and a feeding structure arranged on the dielectric layer; The feeding structure is conductively connected to the metasurface antenna layer; the radiation part and the feeding part are stacked; The metal ground is arranged on the bottom side of the feeding part facing away from the radiation part.

2. The antenna module according to claim 1, characterized in that: The metasurface antenna layer includes a plurality of radiation patches arranged on the substrate, and the radiation patches are arranged in an array.

3. The antenna module according to claim 2, characterized in that: The metasurface antenna layer includes two rows of radiation patches, each row is provided with two radiation patches; a first interval is formed between the radiation patches in the same row, and a second interval is formed between two rows of radiation patches, and the lengths of the first interval and the second interval are the same.

4. The antenna module according to claim 2, characterized in that: The shape of the radiating patch includes a rectangle.

5. The antenna module according to claim 1, characterized in that: The substrate includes an outer surface located on the opposite side of the feeding part, and the supersurface antenna layer is arranged on the outer surface.

6. The antenna module according to claim 1, characterized in that: The feeding part also includes a feeding connector; the feeding structure includes a first section, a second section and a third section; the first section includes a first end and a second end that are relatively arranged, and the second section and the third section extend from the first end in different directions; the second end is conductively connected to the feeding connector.

7. The antenna module according to claim 6, characterized in that: The first section, the second section and the third section form a T-shaped structure.

8. The antenna module according to claim 6, characterized in that: The second section and the third section are respectively provided with a fourth section at one end away from the first section, and the fourth section is connected to the super-surface antenna layer.

9. The antenna module according to claim 8, characterized in that: The fourth section includes a stepped structure arranged along the extension direction.

10. The antenna module according to claim 6, characterized in that: The feeding part comprises two stacked dielectric layers; each dielectric layer is provided with the feeding structure, and the extension directions of the first sections on the two dielectric layers are perpendicular to each other.

11. The antenna module according to claim 10, characterized in that: The feeding connector comprises a first coaxial line and a second coaxial line; the metal ground is provided with a first avoidance ring centered on the first coaxial line and a second avoidance ring centered on the second coaxial line; the feeding part is provided with a metallized through hole connecting the metal ground and one of the feeding structures, and a metallized blind hole connecting the metal ground and another of the feeding structures; The first coaxial line is conductively connected to the second end of one of the feed structures through the metallized through-hole, and the second coaxial line is conductively connected to the second end of another of the feed structures through the metallized blind hole.

12. The antenna module according to claim 6, characterized in that: The metal ground includes at least one hollow gap, and an extending direction of the hollow gap is perpendicular to one of the first sections.

13. The antenna module according to claim 12, characterized in that: The metal ground includes two orthogonal hollow gaps.

14. The antenna module according to claim 1, characterized in that: The material of the substrate includes glass.

15. An electronic device, characterized in that: Comprising the antenna module as described in any one of claims 1-14.

16. The electronic device according to claim 15, characterized in that: The electronic device comprises a rear shell; the rear shell comprises an outer surface and an inner surface arranged opposite to each other, and at least a portion of the rear shell serves as the substrate; the supersurface antenna layer is arranged on the outer surface, and the feeding part is assembled on the inner surface.

17. The electronic device according to claim 16, characterized in that: The supersurface antenna layer is printed on the outer surface.

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