Four-port multi-input-multi-output (MIMO) antenna with high isolation degree

A high-isolation, four-port technology, applied in the field of four-port MIMO antennas, can solve the problems of large size, failure to meet the design requirements of wireless communication equipment, and hinder the development of wireless communication technology, etc., to achieve small size, compact structure, and low cost Effect

Inactive Publication Date: 2016-07-20
HARBIN FEIYU TECH
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Problems solved by technology

[0003] At present, scholars at home and abroad have proposed many MIMO antenna design ideas, but they still cannot meet the design requirements of modern wireless communication equipment, which hinders the development of wireless communication technology to a certain extent.
For example, the MIMO antenna designed in Chinese patent CN102714353A has only two ports, and cannot place more antennas in a limited space under the premise of ensuring high isolation, and the volume is still large

Method used

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  • Four-port multi-input-multi-output (MIMO) antenna with high isolation degree
  • Four-port multi-input-multi-output (MIMO) antenna with high isolation degree

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Embodiment Construction

[0017] A four-port MIMO antenna with high isolation, such as figure 1 As shown, the antenna units are placed perpendicular to each other, and a rectangular metal patch (6) is placed between the antenna units. The vertical placement of the antenna unit can utilize the vertical polarization technology to suppress near-field coupling, and the metal patch (6) can provide an additional coupling path to offset the original coupling current of the non-exciting antenna unit, thereby improving the isolation between the antenna units.

[0018] The dielectric substrate (2) is made of TP2 material, with a dielectric constant of 4.3, a thickness of H, and a side length of L. The ground metal plate (1) covers the entire lower surface of the dielectric substrate (2).

[0019] The four antenna radiation units (3) are rectangular patch antennas, the length and width are L1 and W1 respectively, the distance between adjacent antenna radiation units (3) is S1, and the distance between the four a...

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Abstract

The invention relates to a four-port multi-input-multi-output (MIMO) antenna with high isolation degree. The four-port MIMO antenna comprises a grounding metal plate (1), a dielectric substrate (2), four antenna radiation units (3), four 1/4 wavelength impedance converters (4), four 50-ohm microstrip lines (5) and four metal patches (6). The MIMO antenna is provided with four antenna units, the resonant frequency is 5.2GHz, and the nearest distance between adjacent two antenna units is only 4.75 millimeters and is about 0.082 times of wavelength of a free space corresponding to the resonant frequency; the MIMO antenna is compact in structure and small in size; and the coupling degree among the antenna units is below -19.5dB by a vertical polarization technology and a method of additionally arranging a coupling path on the premise of no increase on the antenna size, and the MIMO antenna is high in isolation degree and is expected to be widely applied to the technical field of wireless communication.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a four-port MIMO antenna with small volume, compact structure, low cost and high isolation. The resonant frequency of the MIMO antenna is 5.2 GHz. Background technique [0002] With the rapid development of wireless communication technology, communication equipment is required to be miniaturized and portable. In practical applications, due to the limitation of the size and structure of the receiver or transmitter, it is necessary to arrange as many antenna elements as possible in a limited space. According to the design requirements of the MIMO antenna, the isolation between the antenna elements must be relatively high, that is, the coupling degree must be low. If the space of the wireless communication device is sufficient, as long as the distance between the antenna elements is increased to make the distance greater than one-half wavelength, the coupling degree ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/52H01Q1/38H01Q1/50H01Q21/28
Inventor 张兰超赵永生孙照清
Owner HARBIN FEIYU TECH
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