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T-shaped structure feeding double-frequency and dual-unit planar microstrip MIMO antenna applied to WLAN

A feeding and planar technology, applied to antennas, electrical components, antenna components, etc., can solve the problems of no polarization diversity characteristics, low isolation of antenna elements, unfavorable device miniaturization, etc., and achieve easy purchase and low antenna profile , easy processing effect

Inactive Publication Date: 2016-06-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above antennas all have the disadvantage of large antenna volume, which is not conducive to the current demand for device miniaturization. In addition, the isolation of the antenna unit is relatively low, the interference is large, and there is no polarization diversity feature.

Method used

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  • T-shaped structure feeding double-frequency and dual-unit planar microstrip MIMO antenna applied to WLAN
  • T-shaped structure feeding double-frequency and dual-unit planar microstrip MIMO antenna applied to WLAN
  • T-shaped structure feeding double-frequency and dual-unit planar microstrip MIMO antenna applied to WLAN

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] The MIMO antenna designed in the present invention is composed of four parts: No. 1 antenna unit, No. 2 antenna unit, a dielectric substrate (3) and a grounding plate (4).

[0018] Antenna unit 1 and antenna unit 2 are fed by a T-shaped 50-ohm port coupling line and the side length is L patch consisting of square radiating patches (1c), L patch The range of values ​​is 24.5mm to 26.5mm. The size of the 50 ohm port feed coupling line of antenna unit 1 and antenna unit 2 is exactly the same. The antenna unit 1 and antenna unit 2 share a square radiation patch (1c). Select any two adjacent sides of the square radiation patch (1c), and place the T-shaped 50-ohm port feed coupling lines of antenna unit 1 and antenna unit 2 in parallel with the two selected sides. The distance between the antenna unit and the T-shaped 50-ohm port feed coupling line o...

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Abstract

The invention provides a T-shaped structure feeding double-frequency and dual-unit planar microstrip MIMO antenna applied to a WLAN, and relates to the field of antennas in passive devices. The designed antenna comprises two antenna units, a dielectric substrate and a ground plate, wherein a square gap is formed in a radiation patch of the antenna units; four rectangular columns are vertically located at four vertex angles of the square gap; a square patch is placed on the top surface of each of the four rectangular columns; the two antenna units are printed on the dielectric substrate; and the ground plate is attached to the lower part of the dielectric substrate. According to the MIMO antenna provided by the invention, the electric size of the antenna is greatly reduced; the occupied space can be greatly reduced; the antenna is low in profile and easy to process; the isolation degree of the antenna is greatly improved; the designed antenna has dual-frequency working characteristic and has stable polarization diversity characteristic; and an FR4 material is adopted by the dielectric substrate, and is low in price and easy to purchase.

Description

technical field [0001] The invention relates to the field of antennas in passive devices, in particular to a planar microstrip MIMO antenna. Background technique [0002] With the rapid development of wireless communication technology, people rely more and more on wireless terminals, and traditional technologies can no longer meet the requirements of data transmission rate and quality. In a multipath environment, Multiple-Input Multiple-Output (MIMO) technology can improve the communication quality and capacity of wireless channels without increasing the working bandwidth and transmission power, and has been listed as LTE ( One of the core technologies of LongTermEvolution). [0003] Scholars at home and abroad have done a lot of research on MIMO antennas. For example: Y.Gao et al. designed a two-unit MIMO antenna system with a very small floor that operates at a center frequency of 5.2 GHz and is applied to WLAN. The coupling degree between antennas is reduced to below -2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q1/24H01Q1/38
CPCH01Q1/241H01Q1/38H01Q1/50
Inventor 李海雄张改改丁君郭陈江
Owner NORTHWESTERN POLYTECHNICAL UNIV
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