CN110829012A - Monopole antenna based on artificial electromagnetic material - Google Patents
Monopole antenna based on artificial electromagnetic material Download PDFInfo
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- CN110829012A CN110829012A CN201911132425.7A CN201911132425A CN110829012A CN 110829012 A CN110829012 A CN 110829012A CN 201911132425 A CN201911132425 A CN 201911132425A CN 110829012 A CN110829012 A CN 110829012A
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- monopole antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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Abstract
The invention discloses a monopole antenna based on artificial electromagnetic materials, which comprises: the antenna comprises a radiation patch, a coplanar waveguide feed structure, an upper dielectric plate, a periodic structure patch layer, a lower dielectric plate and a metal floor. The artificial electromagnetic material made of the periodic structure patch layer is arranged on the upper surface of the lower dielectric plate of the monopole antenna, so that the distance between a radiation patch and a metal floor is reduced while the high gain of the antenna is ensured, and the monopole antenna has the section height of one tenth of the wavelength. Compared with the traditional antenna, the periodic structure patch layer of the monopole antenna has simple structural design, is easy to adapt to different working frequency points of the antenna by changing the size of the structure, and can effectively improve the gain of the antenna and widen the bandwidth of the antenna.
Description
Technical Field
The invention relates to the field of microstrip antennas, in particular to a monopole antenna based on an artificial electromagnetic material.
Background
With the development of communication systems and integrated circuit technologies, the performance and size requirements of microstrip antennas are becoming more and more strict. Due to the simple structure of the monopole antenna, the monopole antenna is widely applied to mobile communication and electronic warfare. In order to achieve the purpose of antenna gain, the distance between the metal floor and the radiation patch of the traditional microstrip antenna is at least one quarter of wavelength, and the distance between the antenna and the metal floor is relatively long, so that the overall section of the antenna is high, and the antenna is difficult to conform to an antenna carrier. Therefore, on the premise of ensuring the radiation performance of the antenna, the monopole antenna with a low section and high gain is designed, and the monopole antenna has important significance for an airborne platform system in mobile communication and electronic warfare.
Disclosure of Invention
The invention aims to provide a monopole antenna based on an artificial electromagnetic material, which has the characteristics of low profile and high gain on the premise of ensuring the radiation performance of the antenna.
In order to achieve the purpose, the invention provides the following scheme:
a monopole antenna based on artificial electromagnetic material, comprising: the device comprises a radiation patch, a coplanar waveguide feed structure, an upper dielectric plate, a periodic structure patch layer, a lower dielectric plate and a metal floor; the radiation patch and the coplanar waveguide feed structure are both positioned on the upper surface of the upper dielectric slab; the lower dielectric plate is opposite to the upper dielectric plate; an air layer is arranged between the lower dielectric plate and the upper dielectric plate; the periodic structure patch layer is printed on the upper surface of the lower dielectric plate; the periodic structure patch layer is made into an artificial electromagnetic material; the metal floor is positioned on the lower surface of the lower-layer dielectric slab.
Optionally, the radiation patch is a circular metal plate; the radiation patch is connected with a microstrip line.
Optionally, the coplanar waveguide feed structure includes: a first rectangular metal plate and a second rectangular metal plate; and the radiation patch and the coplanar waveguide feed structure are fed through a coaxial connector.
Optionally, the upper dielectric plate and the lower dielectric plate are both teflon plates.
Optionally, the periodic structure patch layer is formed by uniformly arranging m rows and n columns of patch units.
Optionally, the patch unit is composed of a square unit and an open ring structure; the square units are positioned inside the split ring structure; the split ring structure is a rotationally symmetrical structure consisting of four right-angle units; the center of the square unit is coincident with the rotation center of the split ring structure.
Optionally, the metal floor is square; the upper dielectric plate, the lower dielectric plate and the metal floor are the same in shape and size.
Optionally, the monopole antenna is manufactured by using a printed circuit board processing technology.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a monopole antenna based on an artificial electromagnetic material, which is characterized in that the artificial electromagnetic material made of a periodic structure is arranged on the upper surface of a lower dielectric plate of the monopole antenna, so that the distance between a radiation patch and a metal floor is reduced while the high gain of the antenna is ensured, and the monopole antenna has the section height of one tenth of wavelength. Compared with the traditional antenna, the periodic structure patch layer of the monopole antenna has simple structural design, is easy to adapt to different working frequency points of the antenna by changing the size of the structure, and can effectively improve the gain of the antenna and widen the bandwidth of the antenna.
In addition, the monopole antenna processing adopts the printed circuit board processing technology, the design is simple, the processing is convenient, and the high-efficiency batch production of the monopole antenna can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic overall structure diagram of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a monopole antenna based on artificial electromagnetic materials according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a periodic structure patch layer of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a periodic structure patch unit of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention;
fig. 5 is a graph of S-parameter of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention;
fig. 6 is a gain diagram of a monopole antenna based on artificial electromagnetic material according to an embodiment of the present invention;
fig. 7 shows the XOZ-plane and YOZ-plane gain patterns of a monopole antenna based on artificial electromagnetic materials according to an embodiment of the present invention; wherein FIG. 7(a) is the radiation pattern of the XOZ and YOZ planes at 5 GHz; FIG. 7(b) shows the radiation patterns of the XOZ plane and the YOZ plane at 6 GHz.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a monopole antenna based on an artificial electromagnetic material, which has the characteristics of low profile and high gain on the premise of ensuring the radiation performance of the antenna.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of an overall monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention. As shown in fig. 1, the monopole antenna based on artificial electromagnetic material provided by the present invention comprises: the antenna comprises a radiation patch 5, a coplanar waveguide feed structure, an upper dielectric plate 6, a periodic structure patch layer 4, a lower dielectric plate 7 and a metal floor 8. The radiation patch 5 and the coplanar waveguide feed structure are both positioned on the upper surface of the upper dielectric plate 6. The lower dielectric plate 7 is opposite to the upper dielectric plate 6. An air layer is arranged between the lower dielectric plate 7 and the upper dielectric plate 6. The periodic structure patch layer 4 is printed on the upper surface of the lower dielectric plate 7. The periodic structure patch layer 4 is made of artificial electromagnetic materials. The metal floor 8 is positioned on the lower surface of the lower dielectric plate 7.
The radiation patch 5 is a circular metal plate. The radiating patch 5 is connected with a microstrip line 3.
The coplanar waveguide feed structure comprises: a first rectangular metal plate 1 and a second rectangular metal plate 2. The radiating patch 5 and the coplanar waveguide feed structure are fed by a coaxial connector.
Fig. 2 is a schematic cross-sectional structure diagram of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention. As shown in fig. 1 and 2, the upper dielectric plate 6 and the lower dielectric plate 7 are both teflon-based plates, wherein the upper dielectric plate 6 is a rectangular parallelepiped teflon-based plate having a dielectric constant of 2.65, a thickness of h1, and a length and a width of W. The radiation patch 5 is located on the upper surface of the upper dielectric plate 6. The lower dielectric plate 7 is a rectangular polytetrafluoroethylene substrate having a dielectric constant of 4.4, a thickness of h2, and a length and a width of W. The periodic structure patch layer 4 is located on the upper surface of the lower dielectric slab 7, and the metal floor 8 is located on the lower surface of the lower dielectric slab 7. An air layer with the thickness h0 is arranged between the upper dielectric plate 6 and the lower dielectric plate 7. The distance between the radiation patch 5 and the metal floor 8 is 6mm, which is about one tenth of the wavelength of the central frequency.
Fig. 3 is a schematic structural diagram of a periodic structure patch layer of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention. As shown in fig. 3, the periodic structure patch layer 4 is formed by uniformly arranging m × n patch units, where m is 6 and n is 6 (in the embodiment of the present invention, but not limited to m is 6 and n is 6). The width of the periodic structure patch layer 4 is W, and the length is L.
Fig. 4 is a schematic structural diagram of a patch unit of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention. As shown in fig. 3 and 4, the patch unit is composed of a square unit and an open ring structure. The square units are positioned inside the split ring structure. The split ring structure is a rotationally symmetrical structure consisting of four right-angle units; the center of the square unit is coincident with the rotation center of the split ring structure. The space between each of the patch units is 0.5mm, wherein the side length of the square unit is L1, and the parameters of the open ring structure with the opening are W1, L2 and W2 respectively. The side length of the circumscribed square of the open ring structure is W1, the side length of any one side of the right-angle unit is L2, and the width of the right-angle unit is W2. Examples of suitable materials include, but are not limited to, h 0-2 mm, h 1-1 mm, h 2-3 mm, L-30 mm, W-30 mm, L1-2 mm, L2-0.75 mm, W1-4.5 mm, and W2-0.25 mm.
The metal floor 8 is square; the shapes and the sizes of the upper dielectric plate 6, the lower dielectric plate 7 and the metal floor 8 are the same.
The monopole antenna is manufactured by adopting a printed circuit board processing technology.
Fig. 5 is a S-parameter graph of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention. Referring to FIG. 5, simulation calculation is performed on the S parameter of the embodiment of the present invention in the range of 4-10 GHz. As can be seen from FIG. 5, the monopole antenna (plus the periodic structure antenna) of the present invention widens the bandwidth of the original monopole antenna (original patch antenna) to 5.5-9.3GHz (the original antenna bandwidth is 6.1-8.6GHz), and the return loss S11 of the single antenna of the present invention is less than-10 dB in this frequency band.
Fig. 6 is a gain diagram of a monopole antenna based on an artificial electromagnetic material according to an embodiment of the present invention. Reference to
As shown in fig. 6, simulation calculation is performed on the gain of each frequency point of the monopole antenna according to the embodiment of the present invention. As can be seen from fig. 6, the monopole antenna of the present invention has a greatly improved Gain (Gain).
Fig. 7 shows gain patterns of the XOZ plane and the YOZ plane of the monopole antenna based on artificial electromagnetic material according to the embodiment of the present invention. Referring to fig. 7, the results of simulation calculation of the radiation patterns of the monopole antenna at 5GHz and 6GHz according to the embodiment of the present invention are shown in fig. 7. As can be seen from fig. 7, the maximum radiation direction of the monopole antenna of the present invention is always kept in the normal direction, and when the monopole antenna operates at 5GHz and 6GHz, the gains in the maximum radiation directions are respectively 6.5dB and 6.3 dB. The section height of the monopole antenna is 6mm, and is only one tenth of the wavelength of the central frequency, so that the characteristics of high gain and low section are realized while the antenna performance is ensured.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A monopole antenna based on artificial electromagnetic material, comprising: the device comprises a radiation patch, a coplanar waveguide feed structure, an upper dielectric plate, a periodic structure patch layer, a lower dielectric plate and a metal floor; the radiation patch and the coplanar waveguide feed structure are both positioned on the upper surface of the upper dielectric slab; the lower dielectric plate is opposite to the upper dielectric plate; an air layer is arranged between the lower dielectric plate and the upper dielectric plate; the periodic structure patch layer is printed on the upper surface of the lower dielectric plate; the periodic structure patch layer is made into an artificial electromagnetic material; the metal floor is positioned on the lower surface of the lower-layer dielectric slab.
2. Monopole antenna based on artificial electromagnetic material as claimed in claim 1, characterized in that the radiating patch is a circular metal plate; the radiation patch is connected with a microstrip line.
3. The monopole antenna based on artificial electromagnetic material as claimed in claim 1, wherein said coplanar waveguide feed structure comprises: a first rectangular metal plate and a second rectangular metal plate; and the radiation patch and the coplanar waveguide feed structure are fed through a coaxial connector.
4. The monopole antenna based on artificial electromagnetic material as claimed in claim 1, wherein said upper dielectric plate and said lower dielectric plate are both teflon-based plates.
5. The monopole antenna based on artificial electromagnetic materials as claimed in claim 1, wherein said periodic structure patch layer is formed by uniformly arranging m rows and n columns of patch units.
6. The monopole antenna based on artificial electromagnetic material as claimed in claim 5, wherein said patch unit is composed of a square unit and an open loop structure; the square units are positioned inside the split ring structure; the split ring structure is a rotationally symmetrical structure consisting of four right-angle units; the center of the square unit is coincident with the rotation center of the split ring structure.
7. The monopole antenna based on an artificial electromagnetic material as claimed in claim 1, wherein said metal floor is square; the upper dielectric plate, the lower dielectric plate and the metal floor are the same in shape and size.
8. The monopole antenna based on an artificial electromagnetic material as claimed in claim 1, wherein said monopole antenna is fabricated using printed circuit board processing techniques.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911132425.7A CN110829012A (en) | 2019-11-19 | 2019-11-19 | Monopole antenna based on artificial electromagnetic material |
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| CN201911132425.7A CN110829012A (en) | 2019-11-19 | 2019-11-19 | Monopole antenna based on artificial electromagnetic material |
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| CN110829012A true CN110829012A (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909570A (en) * | 2021-02-06 | 2021-06-04 | 中北大学 | Three-dimensional broadband wave-absorbing metamaterial integrating multiple absorption mechanisms |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112909570A (en) * | 2021-02-06 | 2021-06-04 | 中北大学 | Three-dimensional broadband wave-absorbing metamaterial integrating multiple absorption mechanisms |
| CN112909570B (en) * | 2021-02-06 | 2022-06-28 | 中北大学 | Three-dimensional broadband wave-absorbing metamaterial integrating multiple absorption mechanisms |
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