CN112670715A - Antenna - Google Patents
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- CN112670715A CN112670715A CN202110078354.8A CN202110078354A CN112670715A CN 112670715 A CN112670715 A CN 112670715A CN 202110078354 A CN202110078354 A CN 202110078354A CN 112670715 A CN112670715 A CN 112670715A
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Abstract
The application provides an antenna, which sequentially comprises an artificial electromagnetic material lens and an MIMO antenna from top to bottom; the artificial electromagnetic material lens comprises a plurality of metal sheets and a medium substrate, wherein the metal sheets are positioned on the upper surface or the lower surface of the medium substrate; the sizes and the intervals of the plurality of metal sheets are the same along the x direction, the sizes from the center to the edge are the same along the y direction, and the intervals are decreased progressively so as to realize the refractive index distribution which is increased progressively from the center to the edge along the y direction; the MIMO antenna is arranged right below the artificial electromagnetic material lens and used for transmitting electromagnetic waves.
Description
Technical Field
The invention relates to the field of antennas, in particular to a wide-beam high-isolation MIMO antenna.
Background
With the development of wireless communication technology, especially the development of positioning technology and spatial perception technology, antennas with wider beam width are required. However, the conventional method for realizing a wide beam by using an antenna such as a microstrip antenna is to adjust the current distribution on a radiation patch, which has a complicated working mechanism and is difficult to realize by engineers in a short time.
A MIMO (multiple input multiple output) antenna is a common antenna type and is used in various aspects of the communication field. Which typically emphasizes a higher degree of isolation between the MIMO antenna elements. Conventional antennas often have difficulty meeting the requirements of practical antennas. The traditional method for increasing the isolation degree is as follows: adding decoupling structures, etc. tends to limit the antenna bandwidth.
Disclosure of Invention
The invention aims to provide an antenna, which sequentially comprises an artificial electromagnetic material lens and an MIMO antenna from top to bottom;
the artificial electromagnetic material lens comprises a plurality of metal sheets and a medium substrate, wherein the metal sheets are positioned on the upper surface or the lower surface of the medium substrate;
the sizes and the intervals of the plurality of metal sheets are the same along the x direction, the sizes from the center to the edge are the same along the y direction, and the intervals are decreased progressively so as to realize the refractive index distribution which is increased progressively from the center to the edge along the y direction;
the MIMO antenna is arranged right below the artificial electromagnetic material lens and used for transmitting electromagnetic waves.
In one possible implementation, the shape of the metal sheet includes any one or a combination of a polygon or an ellipse or an i-shape or a ring shape.
In one possible implementation, the MIMO antenna is any one of a single-polarized antenna, a dual-polarized antenna, a circularly polarized antenna, or a dual circularly polarized antenna.
In one possible implementation, the MIMO antennas are arranged in linear arrays, which are arranged in a line along the x direction, and the centers of the MIMO antennas are located on the xoz plane.
In one possible implementation manner, a dielectric sheet is further arranged above the artificial electromagnetic material lens.
In one possible implementation manner, a layer of dielectric sheet is further included below the artificial electromagnetic material lens.
In one possible implementation, the dielectric sheet comprises any one of glass, plastic, ceramic, and PCB.
In one possible implementation, the MIMO antennas are arranged in an area array, and the centers of the MIMO antennas are located on the xoz plane.
In another aspect, the present application provides a communication device comprising an antenna as claimed in any one of claims 1 to 7.
Due to the application of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the antenna provided by the application is provided with a plurality of metal sheets on the dielectric substrate, and the metal sheets are positioned on the upper surface or the lower surface of the dielectric substrate. The metal sheets with the same size and the same distance are arranged along the x direction, the metal sheets with the same size and the gradually decreased distance are arranged from the center to the edge along the y direction, and the refractive index distribution with the gradually increased distance from the center to the edge in the y direction can be realized. The phase of the aperture field of the antenna in the y direction has a steeper variation trend from the center to the edge, and therefore the wide beam of the antenna directional diagram yoz surface and the high isolation of the MIMO antenna are achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an antenna according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an artificial electromagnetic material lens according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of an antenna according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an artificial electromagnetic material lens according to another embodiment of the present invention;
FIG. 5 is a diagram of S parameter results of a simulation according to an embodiment of the present invention;
FIG. 6 is a diagram of S parameter results of a simulation according to another embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The application provides an antenna, which sequentially comprises an artificial electromagnetic material lens and an MIMO antenna from top to bottom; the artificial electromagnetic material lens comprises a plurality of metal sheets and a medium substrate, wherein the metal sheets are positioned on the upper surface or the lower surface of the medium substrate; the sizes and the intervals of the plurality of metal sheets are the same along the x direction, the sizes from the center to the edge are the same along the y direction, and the intervals are decreased progressively so as to realize the refractive index distribution which is increased progressively from the center to the edge along the y direction; the MIMO antenna is arranged right below the artificial electromagnetic material lens and used for transmitting electromagnetic waves. The artificial electromagnetic material is also called as a metamaterial, and can be used for designing a special electromagnetic structure on the basis of a traditional material to realize specific dielectric constant and magnetic conductivity. And further, the propagation characteristics of the electromagnetic wave can be changed. This application is through setting up a plurality of sheetmetals on dielectric substrate, and the sheetmetal is located dielectric substrate's upper surface or lower surface. The metal sheets with the same size and the same distance are arranged along the x direction, the metal sheets with the same size and the gradually decreased distance are arranged from the center to the edge along the y direction, and the refractive index distribution with the gradually increased distance from the center to the edge in the y direction can be realized. The phase of the aperture field of the antenna in the y direction has a steeper variation trend from the center to the edge, and therefore the wide beam of the antenna directional diagram yoz surface and the high isolation of the MIMO antenna are achieved.
The present invention is further described in detail below with reference to fig. 1 to 6.
Fig. 1 is a 3D structural diagram of an embodiment of the present invention. The method comprises the following steps: artificial electromagnetic material lens 1, MIMO antenna 2. The MIMO antenna is a 2 x 2 antenna, the antenna is in the form of a microstrip antenna, and the working mode is a TM01 mode. The microstrip antenna includes a first radiation patch 2011, a second radiation patch 2012, a third radiation patch 2013, a fourth radiation patch 2014, a dielectric substrate 202, a floor 203, a first excitation point 2041, a second excitation point 2042, a third excitation point 2043, and a fourth excitation point 2044. The excitation points are all located on the central axis of the corresponding radiation patch. The radiation patch, the floor 203, and the dielectric substrate 202 are each rectangular parallelepiped in shape. FIG. 2 is a structural diagram of an artificial electromagnetic material lens 1, which includes a series of metal patches 101 and a substrate 102, and the metal patches 101 are located on the upper surface of the substrate 102. Wherein, the shape of the metal patch 101 is square; the substrate 102 is made of plastic material PPO, which is a rectangular parallelepiped structure. The lower surface of the artificial electromagnetic material lens 1 is parallel to the upper surface of the dielectric substrate 202, and a line connecting the center of the dielectric substrate 202 and the center of the artificial electromagnetic material lens layer 1 is perpendicular to the lower surface of the artificial electromagnetic material lens 1 and the upper surface of the dielectric substrate 202. Preferably, the shortest distance between the artificial electromagnetic material lens 1 and the dielectric substrate 202 is one-half wavelength. In the x direction, the metal patches 101 with the same size are arranged, but adjacent metal patches have a decreasing distance distribution from the center to two sides, which can modify the phase distribution in the x direction of the aperture field of the feed antenna, so that the phase of the aperture field has a steeper phase change trend from the center to two sides, and thus the beam width of the xoz plane of the antenna can be increased; in the y direction, adjacent metal patches 101 have the same pitch and the same size.
Example two
Fig. 3 is a 3D structural diagram of an embodiment of the present invention. The method comprises the following steps: artificial electromagnetic material lens 1, MIMO antenna 2, dielectric piece 3. The MIMO antenna is a 2 x 2 antenna, the antenna is in the form of a microstrip antenna, and the working mode is a TM01 mode. The microstrip antenna includes a first radiation patch 2011, a second radiation patch 2012, a third radiation patch 2013, a fourth radiation patch 2014, a dielectric substrate 202, a floor 203, a first excitation point 2041, a second excitation point 2042, a third excitation point 2043, and a fourth excitation point 2044. The excitation points are all located on the central axis of the corresponding radiation patch. The radiation patch, the floor 203, and the dielectric substrate 202 are each rectangular parallelepiped in shape. The medium sheet 3 is positioned right above the artificial electromagnetic material lens 1, is cuboid in shape, and has a lower surface superposed with the upper surface of the artificial electromagnetic material lens 1. The material of the medium sheet can be any one of glass, plastic, ceramic and PCB. In one exemplary implementation, the material is glass, the dielectric constant is 7.8, and the thickness is 0.55 mm. FIG. 4 is a structural diagram of an artificial electromagnetic material lens 1, which includes a series of metal patches 101 and a substrate 102, and the metal patches 101 are located on the upper surface of the substrate 102. Wherein the shape of the metal patch 101 is square; the substrate 102 is made of plastic material PPO, which is a rectangular parallelepiped structure. The lower surface of the artificial electromagnetic material lens 1 is parallel to the upper surface of the dielectric substrate 202, and a line connecting the center of the dielectric substrate 202 and the center of the artificial electromagnetic material lens layer 1 is perpendicular to the lower surface of the artificial electromagnetic material lens 1 and the upper surface of the dielectric substrate 202. Preferably, the shortest distance between the artificial electromagnetic material lens 1 and the dielectric substrate 202 is one-half wavelength. In the x direction, the metal patches 101 with the same size are arranged, but adjacent metal patches have a decreasing distance distribution from the center to two sides, which can modify the phase distribution in the x direction of the aperture field of the feed antenna, so that the phase of the aperture field has a steeper phase change trend from the center to two sides, and thus the beam width of the xoz plane of the antenna can be increased; in the y direction, adjacent metal patches 101 have the same pitch and the same size. It should be noted that the shape of the metal sheet is not limited to the shape exemplified in the above embodiments, and the shape includes any one or a combination of plural kinds of polygonal shapes, oval shapes, i-shapes, or circular shapes.
FIG. 5 is a graph of S parameter results of the simulation of the present embodiment, it can be seen that the bandwidth of S11 < -10dB is 59.3-60.7 GHz, the isolation is greater than 23.3dB, and the isolation is high.
FIG. 6 is the xoz plane directional diagram simulated by the present embodiment, and it can be seen that the beam width of xoz plane gain greater than-3 dBi is-63 to 61 degrees, and has a wider beam width.
Based on the same concept, the present embodiment further provides a communication device including the wide beam antenna and the communication device described in any one of the first to second embodiments.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents. The inventive concept is explained in detail herein using specific examples, which are given only to aid in understanding the core concepts of the invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
It should be understood that reference to "a plurality" herein means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. An antenna, characterized in that, the antenna includes artifical electromagnetic material lens and MIMO antenna from top to bottom in proper order:
the artificial electromagnetic material lens comprises a plurality of metal sheets and a medium substrate, wherein the metal sheets are positioned on the upper surface or the lower surface of the medium substrate;
the sizes and the intervals of the plurality of metal sheets are the same along the x direction, the sizes from the center to the edge are the same along the y direction, and the intervals are decreased progressively so as to realize the refractive index distribution which is increased progressively from the center to the edge along the y direction;
the MIMO antenna is arranged right below the artificial electromagnetic material lens and used for transmitting electromagnetic waves.
2. The antenna of claim 1, wherein the shape of the metal sheet comprises any one or more of a polygon or an ellipse or an I-shape or a ring.
3. The antenna of claim 1, wherein the MIMO antenna is any one of a single-polarized antenna, a dual-polarized antenna, a circularly polarized antenna, or a dual circularly polarized antenna.
4. An antenna according to any of claims 1 to 3, wherein the MIMO antennas are arranged in linear arrays which are aligned in a row along the x-direction, the centre of the MIMO antennas lying in the xoz plane.
5. The antenna of claim 1, wherein a dielectric sheet is further disposed over the artificial electromagnetic material lens.
6. The antenna of claim 1, further comprising a dielectric sheet beneath the artificial electromagnetic material lens.
7. The antenna of claim 5 or 6, wherein the dielectric sheet comprises any one of glass, plastic, ceramic, and PCB.
8. The antenna according to any one of claims 1 to 3, wherein the MIMO antenna is arranged in an area array, and the center of the MIMO antenna is located on xoz plane.
9. A communication device, characterized in that it comprises an antenna according to any one of claims 1 to 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557624 | 2020-12-24 | ||
| CN2020115576245 | 2020-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112670715A true CN112670715A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110078354.8A Pending CN112670715A (en) | 2020-12-24 | 2021-01-20 | Antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024192551A1 (en) * | 2023-03-17 | 2024-09-26 | 京东方科技集团股份有限公司 | Antenna unit and multi-beam antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645070A (en) * | 2017-07-31 | 2018-01-30 | 东南大学 | Multibeam antenna based on dimensional microwave planar lens and double gradual change slot antenna linear arrays |
| CN108777372A (en) * | 2018-04-27 | 2018-11-09 | 中国科学院微电子研究所 | High-gain phased array microstrip antenna |
| CN109643856A (en) * | 2016-07-11 | 2019-04-16 | 伟摩有限责任公司 | Radar antenna array with parasitic elements excited by surface waves |
| US20190319365A1 (en) * | 2018-04-11 | 2019-10-17 | Samsung Electronics Co., Ltd. | Antenna and unit-cell structure |
| CN111262038A (en) * | 2020-01-21 | 2020-06-09 | 四川大学 | Planar Bessel lens based on non-diffraction beam deflection of super surface and method |
-
2021
- 2021-01-20 CN CN202110078354.8A patent/CN112670715A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109643856A (en) * | 2016-07-11 | 2019-04-16 | 伟摩有限责任公司 | Radar antenna array with parasitic elements excited by surface waves |
| CN107645070A (en) * | 2017-07-31 | 2018-01-30 | 东南大学 | Multibeam antenna based on dimensional microwave planar lens and double gradual change slot antenna linear arrays |
| US20190319365A1 (en) * | 2018-04-11 | 2019-10-17 | Samsung Electronics Co., Ltd. | Antenna and unit-cell structure |
| CN108777372A (en) * | 2018-04-27 | 2018-11-09 | 中国科学院微电子研究所 | High-gain phased array microstrip antenna |
| CN111262038A (en) * | 2020-01-21 | 2020-06-09 | 四川大学 | Planar Bessel lens based on non-diffraction beam deflection of super surface and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024192551A1 (en) * | 2023-03-17 | 2024-09-26 | 京东方科技集团股份有限公司 | Antenna unit and multi-beam antenna |
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