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Multi-layer electromagnetic band gap decoupling structure for microstrip antenna array

A technology of electromagnetic bandgap and microstrip antenna, which is applied in the direction of antenna grounding switch structure connection, antenna coupling, antenna array, etc., can solve the problem of affecting the bandwidth of antenna array, radiation pattern and radiation efficiency, reducing the communication quality of communication system, antenna unit Correlation increases and other issues, to achieve the effect of integrated design, compact structure, and improved isolation

Active Publication Date: 2017-06-30
HARBIN ENG UNIV
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Problems solved by technology

However, in modern mobile communication equipment, the distance between each antenna unit is relatively small, which causes strong mutual coupling between the array units of the antenna array, which will not only affect the bandwidth, radiation pattern and radiation efficiency of the antenna array, etc. characteristics, it will also lead to an increase in the correlation between the antenna elements and reduce the communication quality of the communication system

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  • Multi-layer electromagnetic band gap decoupling structure for microstrip antenna array
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  • Multi-layer electromagnetic band gap decoupling structure for microstrip antenna array

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 and figure 2 As shown, the present invention includes a common ground plane 101 located on the lower surface of the entire dielectric substrate, rectangular radiation patches 301 and 302 on the upper surface of the dielectric substrate, two coaxial feed ports 201 and 202, and three electromagnetic bandgap structural units 1003, 1004 and 1005 and their respective shorting probes 1002, 1001 and 1006. Each electromagnetic bandgap structural unit is composed of 4 layers, and each layer is connected to the ground plane with a short-circuit probe, and two gaps of equal size are formed between the three electromagnetic bandgap units.

[0016] In order to reduce the design cost, the dielectric substrate used in the present invention is FR4 medium with a dielectric constant of 4.4. The length and width of the dielect...

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Abstract

The invention provides a multi-layer electromagnetic band gap decoupling structure for a microstrip antenna array. The multi-layer electromagnetic band gap decoupling structure is used for reducing coupling between antenna array elements of the array by adding three four-layer electromagnetic band gap structures with completely identical structures between array elements of the antenna array. Therefore, coupling between antenna array elements can be reduced and the isolation of the antenna array can be improved. The antenna array includes a common ground plate arranged at the lower surface of a dielectric plate, a rectangular radiation paster arranged at the upper surface of the dielectric plate, two coaxial feed ports, four electromagnetic band gap structure units, and respective short-circuit probes. According to the designed multi-layer electromagnetic band gap decoupling structure, coupling between antenna array elements can be reduced effectively; the isolation of the antenna array can be improved; and the high-performance array antenna design can be realized.

Description

technical field [0001] The invention relates to a multilayer electromagnetic bandgap decoupling structure of a microstrip antenna array. Background technique [0002] In recent years, array antenna technology has been favored by scholars in the field of mobile communications, and has been widely used in base stations and radars. However, as people have higher and higher requirements for mobile communication devices, the array antenna technology is subject to many restrictions in the process of use, such as large volume and low gain. In addition, modern mobile communication devices require miniaturization and portability, which requires that the total space occupied by the array antenna units be reduced, thereby making the distance between the antenna array units smaller. The antenna array element spacing is one of the key parameters for array antenna design. When the distance is greater than one-half of the wavelength, it is considered that the correlation between the anten...

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Application Information

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IPC IPC(8): H01Q1/52H01Q1/50H01Q21/00
CPCH01Q1/50H01Q1/523H01Q21/0006
Inventor 李迎松焦天奇姜弢
Owner HARBIN ENG UNIV
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