A multi-band fractal structure mobile terminal antenna

A mobile terminal antenna and fractal structure technology, which is applied in the direction of antenna, antenna parts, radiation element structure, etc., can solve the problems of narrow band, low profile, and limit wide application, etc., and achieve the effect of good frequency band isolation

Active Publication Date: 2019-04-12
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although, with the continuous development of antenna technology, microstrip antennas have appeared, which have low profile, light weight, low cost, can conform to various carriers, are suitable for mass production of printed circuit board technology, and are easy to achieve circular polarization and dual polarization. , dual-band work and other advantages, but its main disadvantage is narrow-band, which limits its wide application

Method used

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  • A multi-band fractal structure mobile terminal antenna
  • A multi-band fractal structure mobile terminal antenna
  • A multi-band fractal structure mobile terminal antenna

Examples

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Embodiment

[0026] The radiator is formed by three-time fractal nesting, and a square interface is inscribed on the circular patch of metal material. This structure is a 0-order fractal antenna, such as figure 2 As shown; make an inscribed circle in the square interface on the 0-order fractal antenna, and make the inscribed circle upward on the 4 sides of the inscribed square of the 0-order fractal antenna, and have equal size overlap with the 0-order fractal antenna, forming 1st order fractal antenna, such as image 3 shown. Similarly, make an inscribed circle in the square interface on the first-order fractal antenna, and make the inscribed circle upward at the four sides of the inscribed square of the first-order fractal antenna, and overlap with the first-order fractal antenna with equal size, forming 2nd order fractional antennas, such as Figure 4 shown. By analogy, the 2nd-order fractal antenna and the 3rd-order fractal antenna are obtained, and the final form is as follows fi...

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Abstract

The invention discloses a mobile terminal antenna with a multi-band fractal structure. The antenna comprises a radiation body, a grounding plate, a medium baseplate and a feeder line, wherein the radiation body and the grounding plate cover the front and back faces of the medium baseplate respectively; and the feeder line is connected to the radiation body. The radiation body comprises an integrated structure which is formed through layered nesting and connection of n copper-strip structure patches, wherein each layer of patch has a round structure equipped with a square interface; the inner-layer patches are located in the square interfaces of the outer-layer patches, and overlapped parts are located in the circumferential direction and on four edges of the square interfaces; and meanwhile, four fixed points of the square interface in each inner-layer patch are located at center point connecting lines of four edges of a square constituted by four secant lines. The antenna disclosed by the invention has the advantages that 12 common mobile frequency bands are covered by a limited size; a good frequency band isolation degree is provided; and radiation directivity, gains and efficiency can satisfy requirements for the mobile terminal antenna.

Description

technical field [0001] The invention relates to a mobile terminal antenna, in particular to a mobile terminal antenna with a multi-band fractal structure. Background technique [0002] Fractal geometry is a geometry that studies infinitely complex self-similar graphics and structures with specific meanings. Self-similarity is the similarity between the local shape and the overall shape. Fractal has two major characteristics: self-similarity and space filling (that is, fractal dimension ). Fractal antenna is an antenna with fractal characteristics in geometric properties, and it is one of many applications of fractal electrodynamics. Substantial progress has been made in the research of fractal antenna units and fractal antenna arrays abroad, but domestic research in this area is still very little. Fractal antennas are the fusion of fractal theory and antenna technology, showing many advantages compared with traditional antennas. It is a research hotspot in the field of ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/24H01Q1/38
CPCH01Q1/242H01Q1/38H01Q5/328
Inventor 余建国于臻汪钬柱王鹏培赵伦陈雷
Owner BEIJING UNIV OF POSTS & TELECOMM
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