Sierpinski fractal MIMO antenna based on time reversal

A time-reversal and fractal technology, applied in the field of electronics, can solve the problems of large space occupied by the antenna array, poor radiation efficiency, and mutual coupling effect is not considered in the antenna array, and achieve the effect of compact antenna and space saving

Inactive Publication Date: 2015-01-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the antenna array does not take into account the mutual coupling effect between each unit, so the radiation efficiency of the unit becomes worse after the unit is stacked.
Moreover, most of the current mobile terminals are flat. This stacked array arrangement makes the antenna array occupy a large space, which cannot meet the spatial arrangement requirements of flat mobile terminals.

Method used

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  • Sierpinski fractal MIMO antenna based on time reversal
  • Sierpinski fractal MIMO antenna based on time reversal
  • Sierpinski fractal MIMO antenna based on time reversal

Examples

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Embodiment Construction

[0019] The structure of the antenna in this embodiment is as follows figure 2 shown.

[0020] The dimensions of the first dielectric substrate 10 and the second dielectric substrate 11 are both 57*40mm 2 , a thickness of 1mm, and a relative permittivity of 2.2.

[0021] The first radiator 1 and the second radiator 2 are located on the upper surface of the first dielectric substrate 10, and their shape is an equilateral triangle with a side length of 30 mm. The side lengths of each order of fractal triangles are half of the previous order.

[0022] Port 1 is located at the end of the first feeder 3. The first feeder consists of a horizontal part and an inclined part. The size of the horizontal part is 5.7*3.1mm 2 , the inclined part is 7*3.1mm 2 , the angle between the inclined part and the horizontal line is 30°. Port 2 is located at the end of the second feeder 4. The second feeder is composed of a vertical feeder and a horizontal feeder. The size of the vertical feeder ...

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Abstract

The invention discloses a sierpinski fractal MIMO antenna based on time reversal, and belongs to the technical field of electronics. The antenna is provided with three ports, work frequency bands of two MIMO ports can cover common frequency bands of mobile communication GSM/WCDMA, and the work frequency band of the supplement port can cover common frequency bands of a wireless network WLAN/WiMAX. Two sierpinski fractional triangles are distributed in a short distance, the sierpinski fractional triangles each have a sub-wavelength structure and can form a near-field scatterer, and accordingly the antenna has a super-resolution characteristic on a time reversal electromagnetic environment, isolation of the ports can be naturally improved on the time reversal electromagnetic environment, and when the antenna is designed, an overall design concept is adopted, the coupling effect is considered and accordingly radiant efficiency is prevented for descending.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to a time-reversal multiple-input multiple-output (MIMO) antenna technology for wireless communication terminals. Background technique [0002] With the continuous growth of personal service requirements, mobile terminals are faced with a huge demand for urgent improvement in communication capacity and communication rate. Designing multiple antenna units on the mobile terminal and increasing the number of independent wireless channels is one of the main means for future mobile communication to improve the communication performance of the mobile terminal. According to the traditional theory, in order to obtain good space diversity gain and space multiplexing gain for a multi-antenna system (array antenna), it is required that the distance between antenna elements should not be less than half of the working wavelength. If the distance between the antenna units is much smaller tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q5/00H01Q1/48
Inventor 王任王秉中龚志双丁霄
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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