CN206992315U - A kind of lower coupling microstrip antenna array based on defect ground structure - Google Patents
A kind of lower coupling microstrip antenna array based on defect ground structure Download PDFInfo
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- CN206992315U CN206992315U CN201720844914.5U CN201720844914U CN206992315U CN 206992315 U CN206992315 U CN 206992315U CN 201720844914 U CN201720844914 U CN 201720844914U CN 206992315 U CN206992315 U CN 206992315U
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Abstract
Description
技术领域technical field
本实用新型涉及天线设计技术领域,特别涉及一种基于缺陷地结构的低耦合微带天线阵。The utility model relates to the technical field of antenna design, in particular to a low-coupling microstrip antenna array based on a defective ground structure.
背景技术Background technique
近年来，无线通信技术飞速发展，微带天线以质量轻、体积小、易于制作等优点，在卫星通信系统、导航系统、雷达系统以及生物医学领域得到了广泛的应用。在空间没有限制的终端上很容易安装多个天线。然而，移动设备的平台很有限，很难在一个平台上同时安置多个天线。当天线阵元间的距离减小时，表面波耦合占主导地位，就导致天线阵元间的互耦效应增强，从而影响系统性能。In recent years, with the rapid development of wireless communication technology, microstrip antennas have been widely used in satellite communication systems, navigation systems, radar systems, and biomedical fields due to their advantages of light weight, small size, and easy fabrication. Multiple antennas are easily installed on terminals where space is not limited. However, the platforms of mobile devices are very limited, and it is difficult to place multiple antennas on one platform at the same time. When the distance between the antenna elements decreases, the surface wave coupling dominates, which leads to the enhancement of the mutual coupling effect between the antenna elements, thus affecting the system performance.
为了解决天线阵元间互耦效应的影响，国内外研究者提出了很多去耦的方法。去耦可以通过改变天线单元的形状、阵列结构、阵列单元的数目以及阵列放置方式来实；也可以在两个天线单元间加入地支结构，然而该方法并不具有通用性，仅适合某一类型的天线设计；电流中和技术解耦的方法能有效减小天线之间的互耦，然而选择弯折线的位置及尺寸来控制摘取电流的大小非常困难；也有人采用电磁带隙（EBG）结构，该结构在介质中挖空相对困难，制作麻烦，且带隙特性的效果不佳，与EBG相比，缺陷地（DGS）结构制作简单、便于集成且具有更好的带隙特性。In order to solve the influence of the mutual coupling effect between antenna elements, researchers at home and abroad have proposed many decoupling methods. Decoupling can be achieved by changing the shape of the antenna unit, the array structure, the number of array units, and the array placement method; it is also possible to add a ground support structure between two antenna units, but this method is not universal and only suitable for a certain type antenna design; the method of current neutralization technology decoupling can effectively reduce the mutual coupling between antennas, but it is very difficult to select the position and size of the bending line to control the magnitude of the extraction current; some people use electromagnetic bandgap (EBG) The structure, which is relatively difficult to hollow out in the medium, is cumbersome to fabricate, and the effect of the bandgap characteristic is not good. Compared with EBG, the defect ground (DGS) structure is simple to manufacture, easy to integrate and has better bandgap characteristics.
发明内容Contents of the invention
鉴于此,本实用新型所要解决的技术问题是提供一种基于缺陷地结构的低耦合微带天线阵,以增大隔离度，减小天线间的互耦。In view of this, the technical problem to be solved by the utility model is to provide a low-coupling microstrip antenna array based on a defective ground structure to increase isolation and reduce mutual coupling between antennas.
本实用新型的目的是通过以下技术方案实现的：一种基于缺陷地结构的低耦合微带天线阵，包括介质基板、接地板、辐射贴片和缺陷地结构，接地板在介质基板背面下方。所述缺陷地结构是一个哑铃形槽：哑铃形槽的上下两端是两个全等的矩形，两个全等的矩形由一个肘形的结构连接；所述辐射贴片包括两个矩形贴片。The purpose of this utility model is achieved through the following technical solutions: a low-coupling microstrip antenna array based on a defective ground structure, including a dielectric substrate, a ground plate, a radiation patch and a defective ground structure, and the ground plate is below the back of the dielectric substrate. The defective ground structure is a dumbbell-shaped trough: the upper and lower ends of the dumbbell-shaped trough are two congruent rectangles, and the two congruent rectangles are connected by an elbow-shaped structure; the radiation patch includes two rectangular patches piece.
进一步的，所述缺陷地结构的个数为一个或者一个以上。Further, the number of said defective structures is one or more.
进一步的，所述辐射贴片沿介质基板中心线左右对称。Further, the radiation patch is left-right symmetrical along the center line of the dielectric substrate.
进一步的，所述两个矩形贴片的长度L均为15.26mm，宽度W均为14.63mm。Further, the length L of the two rectangular patches is both 15.26mm, and the width W is both 14.63mm.
进一步的，所述两个矩形贴片的间距m=15mm。Further, the distance between the two rectangular patches is m=15mm.
进一步的，所述辐射贴片采用同轴馈电方式，且馈电点偏置。Further, the radiation patch adopts a coaxial feeding method, and the feeding point is biased.
本实用新型提出了一种缺陷地结构来降低天线阵元间的互耦效应。该缺陷地结构简单、紧凑、易于实现，仿真结果表明在谐振频率5.0GHZ附近，天线的隔离度增大了30dB，有效地抑制了天线阵元间的耦合。The utility model proposes a defective ground structure to reduce the mutual coupling effect between antenna array elements. The structure of this defect is simple, compact, and easy to implement. Simulation results show that near the resonance frequency of 5.0GHZ, the isolation of the antenna increases by 30dB, which effectively suppresses the coupling between antenna elements.
附图说明Description of drawings
为了使本实用新型的目的、技术方案和优点更加清楚,下面将结合附图对本实用新型作进一步的详细描述,其中:图1为本实用新型一种基于缺陷地结构的低耦合微带天线阵的整体结构示意图。In order to make the purpose, technical solutions and advantages of the present utility model more clear, the utility model will be further described in detail below in conjunction with the accompanying drawings, wherein: Fig. 1 is a low-coupling microstrip antenna array based on a defective ground structure of the utility model A schematic diagram of the overall structure.
图2为没有加缺陷地结构时天线隔离度S12的示意图。FIG. 2 is a schematic diagram of the antenna isolation S12 when no defect is added to the structure.
图3为加缺陷地结构时天线隔离度S12的示意图。FIG. 3 is a schematic diagram of the antenna isolation S12 when a defective ground structure is added.
其中：1-介质基板；2-矩形贴片；3-缺陷地结构；4- 馈电点。Among them: 1-dielectric substrate; 2-rectangular patch; 3-defect ground structure; 4-feed point.
具体实施方式detailed description
为了使本实用新型所要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图和实施例，对本实用新型进行进一步地详细说明。应当理解此处所描述的具体实例仅用以解释本实用新型，并不用于限定本实用新型。In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific examples described here are only used to explain the utility model, and are not intended to limit the utility model.
图1为实用新型一种基于缺陷地结构的低耦合微带天线阵，如图所示，辐射贴片包括两个矩形贴片2，两个矩形贴片2沿介质基板1中心线左右对称，两个矩形贴片2的长度L均为15.26mm，宽度W均为14.63mm，且两个矩形贴片2的间距m=15mm。辐射贴片采用同轴馈电方式，且馈电点4偏置。Fig. 1 is a low-coupling microstrip antenna array based on a defect ground structure of the utility model. As shown in the figure, the radiation patch includes two rectangular patches 2, and the two rectangular patches 2 are left and right symmetrical along the center line of the dielectric substrate 1. The length L of the two rectangular patches 2 is both 15.26mm and the width W is 14.63mm, and the distance between the two rectangular patches 2 is m=15mm. The radiation patch adopts a coaxial feeding mode, and the feeding point 4 is biased.
缺陷地结构3是一个哑铃形槽：哑铃形槽的上下两端是两个全等的矩形，两个全等的矩形由一个肘形的结构连接；缺陷地结构3蚀刻在地板上，缺陷地结构3的个数为一个或者一个以上，在本实用新型中，微带天线阵的接地板上蚀刻了三个相同的哑铃形槽缺陷地结构，哑铃形槽的间距g=2mm。Defective structure 3 is a dumbbell-shaped trough: the upper and lower ends of the dumbbell-shaped trough are two congruent rectangles, and the two congruent rectangles are connected by an elbow-shaped structure; the defective ground structure 3 is etched on the floor, and the defective ground The number of structures 3 is one or more. In the present invention, three identical dumbbell-shaped grooves are etched on the ground plate of the microstrip antenna array, and the distance between the dumbbell-shaped grooves is g=2mm.
比较图2和图3，可以看出加缺陷地结构和不加缺陷地结构，天线隔离度S12的数值差异很大，不加缺陷地结构时，S12值为-18dB，加缺陷地结构时，S12值为-49dB，可以看出在谐振频率5.0GHZ附近，天线的隔离度值增大了31dB。由此可以看出，本实用新型的缺陷地结构有明显的去耦效果，本微带天线阵具有较低的耦合度。Comparing Figure 2 and Figure 3, it can be seen that the structure with defects and the structure without defects have a large difference in the value of the antenna isolation S12. When the structure without defects is added, the S12 value is -18dB. When the structure with defects is added, The S12 value is -49dB. It can be seen that the isolation value of the antenna increases by 31dB near the resonance frequency of 5.0GHZ. It can be seen from this that the defective ground structure of the present invention has an obvious decoupling effect, and the microstrip antenna array has a relatively low coupling degree.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165408A (en) * | 2019-05-10 | 2019-08-23 | 中国工程物理研究院电子工程研究所 | A kind of high-isolation Beidou array antenna based on electromagnetism Meta Materials |
| CN110190383A (en) * | 2019-06-17 | 2019-08-30 | 中天宽带技术有限公司 | A kind of multifrequency antenna for base station with defect ground structure |
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2017
- 2017-07-13 CN CN201720844914.5U patent/CN206992315U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165408A (en) * | 2019-05-10 | 2019-08-23 | 中国工程物理研究院电子工程研究所 | A kind of high-isolation Beidou array antenna based on electromagnetism Meta Materials |
| CN110190383A (en) * | 2019-06-17 | 2019-08-30 | 中天宽带技术有限公司 | A kind of multifrequency antenna for base station with defect ground structure |
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