A small size and high isolation three-element multiple-input multiple-output antenna based on printed circuit board

A printed circuit board, small size technology, applied in the field of small size and high isolation three-unit multi-input and multi-output antennas, can solve the problems of size compression, unsatisfactory pattern characteristics and gain characteristics, and inconsistent antenna operating modes. Reduce, reduce process requirements and manufacturing costs, the effect of good decoupling effect

Active Publication Date: 2015-08-19
TSINGHUA UNIV
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Problems solved by technology

However, the working mode of the former antenna is not uniform, and the pattern characteristics and gain characteristics are not ideal, while the structure of the latter is mostly related to the wavelength, so it is difficult to further compress the size

Method used

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  • A small size and high isolation three-element multiple-input multiple-output antenna based on printed circuit board
  • A small size and high isolation three-element multiple-input multiple-output antenna based on printed circuit board
  • A small size and high isolation three-element multiple-input multiple-output antenna based on printed circuit board

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Embodiment Construction

[0018] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0019] The invention is a small-sized high-isolation three-unit multi-input multi-output antenna based on a printed circuit board. In order to reduce the area occupied by the antenna, the design adopts a disc structure, and the three antenna units are distributed on the disc-shaped printed circuit substrate 1 in a rotational symmetry of 120 degrees. Each unit is a slot antenna 2 with an open terminal, and adopts a microstrip feed mode, and its radiation direction is a directional beam along the radial direction. In order to further reduce the size of the slot antenna, a T-shaped structure is adopted in the design of the slot antenna, and its radial dimension is about one-eighth of a wavelength.

[0020] Since the arrangement of the antenna elements is very compact, there is a strong mutual coupling between the three antenna elements. In order ...

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Abstract

The invention discloses a small-size high-isolation three-unit MIMO antenna based on a printed circuit board. The antenna comprises a substrate, slot antenna bodies with an open-loop terminal and a micro-strip feed circuit with a micro-strip decoupling structure. The substrate is a double-face printed circuit board with a rotational symmetry structure, the micro-strip feed circuit is etched on the front face of metal of the substrate, the slot antenna bodies are etched on the reverse side of the substrate, the substrate is provided with feed through holes used for feed and short-circuit through holes used for matching, the micro-strip feed circuit is composed of standard micro-strip feeder lines and the corresponding micro-strip decoupling structure, and the micro-strip feeder lines pass through the slot antenna bodies, carry out feed on the slot antenna bodies through coupling and are matched with the short-circuit through holes; the micro-strip decoupling structure is connected with the micro-strip feeder lines to provide a new coupling component for offsetting an original coupling component of the connecting position so as to achieve decoupling. The size of the antenna is reduced, high isolation and directional radiation characteristics are achieved, and the antenna can be applied to small-sized wireless communication equipment with the MIMO technology adopted.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a small-sized high-isolation three-unit multi-input multi-output antenna based on a printed circuit board. Background technique [0002] In recent years, with the development and progress of technology, people have higher and higher requirements for wireless communication speed. As the channel capacity approaches the Shannon limit, it is increasingly difficult to achieve a major breakthrough in the traditional way of increasing the communication rate due to the limited frequency band and power in wireless communication. In this context, emerging airspace resources have become a research hotspot. It is against this background that Multiple Input Multiple Output (Multiple Input Multiple Output, hereinafter referred to as MIMO) technology emerges. MIMO technology refers to the use of multi-unit antennas at the receiving and receiving ends of wireless communication. By removing th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q21/30H01Q1/48
Inventor 王涵刘龙生李越张志军冯正和
Owner TSINGHUA UNIV
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