CN109904629B - Array antenna based on defected ground structure - Google Patents
Array antenna based on defected ground structure Download PDFInfo
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- CN109904629B CN109904629B CN201910067800.8A CN201910067800A CN109904629B CN 109904629 B CN109904629 B CN 109904629B CN 201910067800 A CN201910067800 A CN 201910067800A CN 109904629 B CN109904629 B CN 109904629B
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Abstract
The array antenna based on the defected ground structure comprises a dielectric substrate, a top metal layer and a bottom metal layer, wherein the top metal layer comprises two antenna unit patches which are oppositely arranged; two feed ports are arranged on one side of the dielectric substrate, each feed port corresponds to one antenna unit patch, and each antenna unit patch is connected with one feed port through a microstrip line; the bottom metal layer is provided with a defected ground structure, and the projection of the defected ground structure on the dielectric substrate is positioned between the projections of the two antenna unit patches on the dielectric substrate; the defected ground structure comprises a plurality of first hexagram-shaped grooves which are connected with each other and are linearly arranged, and a second hexagram-shaped groove is arranged at each vertex of each first hexagram-shaped groove. The invention optimizes the traditional array antenna, has simple design structure, reduces the mutual coupling among the antenna units, improves the gain of the antenna, and is more suitable for the requirements of low coupling and high gain of the modern microwave millimeter wave antenna.
Description
Technical Field
The invention relates to an array antenna, in particular to an array antenna based on a defected ground structure, and belongs to the technical field of antenna design.
Background
With the research and development of wireless communication technology, microstrip antennas are gaining favor in various fields such as military, communication, medical treatment and the like due to the advantages of light weight, small size, easy manufacture and the like. However, the space of the current communication system is limited, and it is difficult to install a plurality of antenna units on the premise of ensuring the performance of a single antenna. When the distance between the antenna units is reduced, the surface wave coupling is dominant, so that the mutual coupling effect between the antenna units is enhanced, and the performance of the system is influenced.
In order to solve the problem of mutual coupling effect between antenna units, a great deal of research is done by domestic and foreign scholars, and various structures such as electromagnetic band gap structures, frequency selective structures, photonic band gap structures, defected ground structures and the like are proposed. However, the electromagnetic band gap structure, the frequency selection structure and the photonic band gap structure have relatively complex structures, and have very high design and manufacturing costs, while the defected ground structure has a good effect on decoupling, the array antenna of the defected ground structure is an effective improvement of the defected ground structure in a mode of slotting on a ground plate among the traditional array antenna units, and the array antenna has the characteristics of simple structure, small volume and easy integration of a microstrip patch antenna serving as an antenna unit, and also has the characteristic of high gain of the array antenna, and the higher antenna gain enables the array antenna to become a microwave millimeter wave antenna with great development prospect.
In summary, it is an urgent need to solve the above-mentioned problems in the art how to use a defected ground structure array antenna to reduce mutual coupling between array antenna units and increase antenna gain.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides an array antenna based on a defected ground structure, overcomes the performance loss caused by strong mutual coupling among array antenna units, and has important application value in microwave integration, miniaturization and high-gain circuits.
The technical solution of the invention is as follows:
the array antenna based on the defected ground structure comprises a dielectric substrate, a top metal layer arranged on the top layer of the dielectric substrate and a bottom metal layer arranged on the bottom layer of the dielectric substrate, wherein the top metal layer comprises two antenna unit patches which are oppositely arranged; two feed ports are arranged on one side of the dielectric substrate, each feed port corresponds to one antenna unit patch, and each antenna unit patch is connected with one feed port through a microstrip line; the bottom metal layer is provided with a defected ground structure, and the projection of the defected ground structure on the dielectric substrate is positioned between the projections of the two antenna unit patches on the dielectric substrate;
the defect ground structure comprises five first hexagram-shaped grooves which are connected with each other and are linearly arranged, and a connecting line of the centers of the five first hexagram-shaped grooves is superposed with a symmetry axis of the medium substrate; each vertex of each first six-mango star-shaped groove is provided with a second six-mango star-shaped groove, the second six-mango star-shaped grooves at the opposite vertexes of the two adjacent first six-mango star-shaped grooves are superposed, and the side length of each first six-mango star-shaped groove is 4 times that of each second six-mango star-shaped groove; the dielectric substrate is rectangular, and the defected ground structure array antenna is axisymmetrical with respect to a symmetry axis of the dielectric substrate.
Preferably, the top metal layer includes a first antenna element patch and a second antenna element patch, which are symmetric with respect to the symmetry axis of the dielectric substrate, and the first antenna element patch and the second antenna element patch are both rectangular in shape.
Preferably, a first notch and a second notch are respectively formed on one side of the first antenna element patch and one side of the second antenna element patch.
Preferably, one side of the dielectric substrate is provided with a first feeding port and a second feeding port, and the first feeding port and the second feeding port are located on the same side of the dielectric substrate, the first feeding port corresponds to the first notch of the first antenna element patch, and the second feeding port corresponds to the second notch of the second antenna element patch.
Preferably, the first notch is connected to the first feed port through a first microstrip line, the second notch is connected to the second feed port through a second microstrip line, and the first microstrip line and the second microstrip line are parallel to each other.
Compared with the prior art, the invention has the following technical effects: the invention optimizes the traditional array antenna, has simple design structure, reduces the mutual coupling among the antenna units, improves the gain of the antenna, and is more suitable for the requirements of low coupling and high gain of the modern microwave millimeter wave antenna. Meanwhile, the array antenna is more compact due to the structure, and has better performance under the condition that the distance between the antenna units is the same, so that the miniaturization of the whole size of the antenna is realized, the processing cost is reduced, the mutual coupling between the antennas is reduced, and the antenna gain is improved.
The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of facilitating understanding and understanding of the technical solutions of the present invention.
Drawings
FIG. 1 is a schematic three-dimensional structure of the present invention;
FIG. 2 is a three-dimensional cutaway view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is the S parameter simulation result of the present invention;
fig. 5 is a schematic of the 3D pattern of the present invention.
The antenna comprises a top metal layer 1, a first antenna unit patch 11, a first notch 111, a second antenna unit patch 12, a second notch 121, a first microstrip line 13, a second microstrip line 14, a dielectric substrate 2, a first feed port 21, a second feed port 22, a bottom metal layer 3, a first hexagram-shaped groove 31 and a second hexagram-shaped groove 311.
Detailed Description
The array antenna based on the defected ground structure, as shown in fig. 1-3, includes a dielectric substrate 2, a top metal layer 1 disposed on the top layer of the dielectric substrate 2, and a bottom metal layer 3 disposed on the bottom layer of the dielectric substrate 2. In the technical scheme of the invention, the dielectric substrate 2 is rectangular, the dielectric substrate 2 adopts a Rogers 5880 dielectric plate, the dielectric constant is 2.2, and the thickness is 0.787 mm.
The top metal layer 1 comprises two antenna unit patches which are arranged oppositely, and the distance between the two antenna unit patches is determined according to the working frequency of the whole defected ground array antenna; two feed ports are arranged on one side of the dielectric substrate 2, each feed port corresponds to one antenna unit patch, each antenna unit patch is connected with one feed port through a microstrip line, the same excitation is loaded at the two feed ports, the energy is transmitted to the corresponding antenna unit patches through transmission lines, and the antenna unit patches radiate outwards; in this embodiment, the radiation structure of the whole antenna includes an antenna element patch, a microstrip line and a hexagram-shaped slot, which are all located at the center of the dielectric substrate 2 and are symmetrical to each other. The top metal layer 1 comprises a first antenna unit patch 11 and a second antenna unit patch 12 which are symmetrical about a symmetry axis of the dielectric substrate 2, and the first antenna unit patch 11 and the second antenna unit patch 12 are both rectangular; a first notch 111 and a second notch 121 are respectively formed on one side of the first antenna element patch 11 and one side of the second antenna element patch 12.
A first feeding port 21 and a second feeding port 22 are arranged on one side of the dielectric substrate 2, the first feeding port 21 and the second feeding port 22 are positioned on the same side of the dielectric substrate 2, the first feeding port 21 corresponds to the first notch 111 of the first antenna element patch 11, the second feeding port 22 corresponds to the second notch 121 of the second antenna element patch 12,
the first notch 111 is connected to the first feeding port 21 through the first microstrip line 13, the second notch 121 is connected to the second feeding port 22 through the second microstrip line 14, and the first microstrip line 13 and the second microstrip line 14 are parallel to each other.
In this embodiment, the width of the first notch 111 or the second notch 121 is greater than the width of the first microstrip line 13 or the second microstrip line 14, and the width of the first feeding port 21 or the second feeding port 22 is equal to the width of the first microstrip line 13 or the second microstrip line 14.
In addition, the bottom metal layer 3 is provided with a defected ground structure, and the projection of the defected ground structure on the dielectric substrate 2 is positioned between the projections of the two antenna unit patches on the dielectric substrate 2; the defected ground structure comprises five first hexagram-shaped grooves 31 which are connected with each other and are linearly arranged, and a second hexagram-shaped groove 311 is arranged at each vertex of each first hexagram-shaped groove 31. The arrangement of the defected ground structure can smoothly realize the functions of inhibiting mutual coupling of the antenna unit elements and improving the gain of the antenna, and compared with an array antenna with the same material consumption, the defected ground structure has the advantages of more compact antenna and lower cost.
Specifically, the defected ground structure comprises five first six-mango star-shaped grooves 31 which are connected with each other and are linearly arranged, the connecting line of the centers of the five first six-mango star-shaped grooves 31 is superposed with the symmetry axis of the medium substrate 2, the second six-mango star-shaped grooves 311 at the opposite vertex points of two adjacent first six-mango star-shaped grooves 31 are superposed, and the side length of each first six-mango star-shaped groove 31 is 4 times that of the second six-mango star-shaped groove 311.
Fig. 4 is a simulation result of return loss and insertion loss of the array antenna based on the defected ground structure according to the present invention. Therefore, the array antenna based on the defected ground structure has the working bandwidth of 11.4 GHz-11.78 GHz, the central frequency of 11.58GHz and the insertion loss as low as-33 dB. Fig. 5 is a two-dimensional radiation pattern of the array antenna based on the defected ground structure, and from fig. 5, it can be seen that the gain of the array antenna in the present invention is up to 9.868dB, and the gain is significantly improved compared with the conventional antenna.
The array antenna based on the defected ground structure overcomes the performance loss caused by strong mutual coupling among array antenna units, has important application value in microwave integration, miniaturization and high-gain circuits, and simultaneously expands the application of the array antenna based on the defected ground structure in the modern microwave and millimeter wave circuit integration.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.
Claims (5)
1. Array antenna based on defected ground structure, its characterized in that: the antenna comprises a dielectric substrate (2), a top metal layer (1) arranged on the top layer of the dielectric substrate (2), and a bottom metal layer (3) arranged on the bottom layer of the dielectric substrate (2), wherein the top metal layer (1) comprises two antenna unit patches which are arranged oppositely; two feed ports are arranged on one side of the dielectric substrate (2), each feed port corresponds to one antenna unit patch, and each antenna unit patch is connected with one feed port through a microstrip line; the bottom metal layer (3) is provided with a defected ground structure, and the projection of the defected ground structure on the dielectric substrate (2) is positioned between the projections of the two antenna unit patches on the dielectric substrate (2);
the defected ground structure comprises five first six-mango star-shaped grooves (31) which are connected with each other and are linearly arranged, and the connecting line of the centers of the five first six-mango star-shaped grooves (31) is superposed with the symmetry axis of the medium substrate (2); each vertex of each first six-mango star-shaped groove (31) is provided with a second six-mango star-shaped groove (311), the second six-mango star-shaped grooves (311) at the opposite vertexes of the two adjacent first six-mango star-shaped grooves (31) are overlapped, and the side length of each first six-mango star-shaped groove (31) is 4 times that of each second six-mango star-shaped groove (311); the dielectric substrate (2) is rectangular, and the defected ground structure array antenna is axisymmetrical with respect to a symmetry axis of the dielectric substrate (2).
2. The defected ground structure based array antenna of claim 1, wherein: the top metal layer (1) comprises a first antenna unit patch (11) and a second antenna unit patch (12), the first antenna unit patch and the second antenna unit patch are symmetrical about the symmetry axis of the dielectric substrate (2), and the first antenna unit patch (11) and the second antenna unit patch (12) are rectangular in shape.
3. The defected ground structure based array antenna of claim 2, wherein: a first notch (111) and a second notch (121) are respectively formed in one side of the first antenna element patch (11) and one side of the second antenna element patch (12).
4. The defected ground structure based array antenna of claim 3, wherein: a first feeding port (21) and a second feeding port (22) are arranged on one side of the dielectric substrate (2), the first feeding port (21) and the second feeding port (22) are located on the same side of the dielectric substrate (2), the first feeding port (21) corresponds to a first notch (111) of the first antenna element patch (11), and the second feeding port (22) corresponds to a second notch (121) of the second antenna element patch (12).
5. The defected ground structure based array antenna of claim 4, wherein: the first notch (111) is connected with the first feed port (21) through a first microstrip line (13), the second notch (121) is connected with the second feed port (22) through a second microstrip line (14), and the first microstrip line (13) and the second microstrip line (14) are parallel to each other.
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| CN113517572B (en) * | 2021-03-25 | 2022-09-23 | 西安电子科技大学 | High-isolation double-frequency dual-polarization array antenna for millimeter wave frequency band |
| CN113594677A (en) * | 2021-07-29 | 2021-11-02 | 安徽大学 | Millimeter wave high gain series feed microstrip loop antenna |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101316008A (en) * | 2008-06-13 | 2008-12-03 | 哈尔滨工业大学 | MIMO mobile terminal multi-antenna with high isolation and low correlated characteristic |
| CN205944428U (en) * | 2016-08-26 | 2017-02-08 | 桂林电子科技大学 | Loading graphite alkene decoupling network's microstrip array antenna |
| CN107785661A (en) * | 2017-10-18 | 2018-03-09 | 哈尔滨工程大学 | A kind of uncoupling array antenna based on double frequency Meta Materials |
| CN107910637A (en) * | 2017-10-10 | 2018-04-13 | 云南大学 | A kind of dentation Miniaturisation ultra-wideband antenna for loading star gap |
| CN207542393U (en) * | 2017-10-10 | 2018-06-26 | 云南大学 | A kind of dentation ultra-wideband antenna |
| CN207753164U (en) * | 2018-01-31 | 2018-08-21 | 河北工业大学 | A kind of compact high isolation mimo antenna of load defect ground structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207818885U (en) * | 2018-01-18 | 2018-09-04 | 华南师范大学 | A kind of microstrip slot antenna of directional diagram reconstructable |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101316008A (en) * | 2008-06-13 | 2008-12-03 | 哈尔滨工业大学 | MIMO mobile terminal multi-antenna with high isolation and low correlated characteristic |
| CN205944428U (en) * | 2016-08-26 | 2017-02-08 | 桂林电子科技大学 | Loading graphite alkene decoupling network's microstrip array antenna |
| CN107910637A (en) * | 2017-10-10 | 2018-04-13 | 云南大学 | A kind of dentation Miniaturisation ultra-wideband antenna for loading star gap |
| CN207542393U (en) * | 2017-10-10 | 2018-06-26 | 云南大学 | A kind of dentation ultra-wideband antenna |
| CN107785661A (en) * | 2017-10-18 | 2018-03-09 | 哈尔滨工程大学 | A kind of uncoupling array antenna based on double frequency Meta Materials |
| CN207753164U (en) * | 2018-01-31 | 2018-08-21 | 河北工业大学 | A kind of compact high isolation mimo antenna of load defect ground structure |
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