Improved dual-polarization base station antenna and method for improving cross-polarization ratio

A base station antenna and dual-polarization technology, which is applied in the field of improved dual-polarization base station antennas, can solve problems such as lack of analysis and guidance design, and achieve the effect of improving the cross-polarization ratio

Inactive Publication Date: 2014-12-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Now antenna companies usually rely on simulation software to "adjust" or "make up" the cross-polarization ratio adjustment, lacking theoretical analysis to guide the design

Method used

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  • Improved dual-polarization base station antenna and method for improving cross-polarization ratio
  • Improved dual-polarization base station antenna and method for improving cross-polarization ratio
  • Improved dual-polarization base station antenna and method for improving cross-polarization ratio

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Embodiment 1

[0039] An improved dual-polarized base station antenna, including a metal floor, a radiator, a microstrip substrate, and four metal strips, the four metal strips realize four parasitic currents, and the radiator and the four metal strips are printed on the microstrip On the substrate, four metal strips are made of copper skin, with a length of 85 mm and a width of 1 mm. The radiator and the square formed by the four metal strips are on the same horizontal plane. Adjacent metal strips do not touch, and the radiator is located in the center. point, the center frequency of the antenna in this embodiment is 2.2 GHz.

[0040] Figure 4 is the standing wave ratio of the antenna simulation and test. In the 1.71-2.69 frequency band, VSWR Figure 5 is |S21|, which means that the isolation between the two ports is above 25dB. Figure 6(a)-Figure 6(f) is the radiation pattern. Table 4 and Table 5 are the summary of the radiation characteristics of the first port 4 and the second port 5...

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Abstract

The invention discloses an improved dual-polarization base station antenna and a method for improving cross-polarization ratio. The improved dual-polarization base station antenna comprises a metal floor, a radiating body and a feed part, and also comprises four metal strips, wherein the four metal strips form a square on the identical horizontal plane; the side length of the square is one wavelength of a center frequency; the vertical distance from the central point of the square to the metal floor is quarter wavelength of the center frequency of the antenna; the central point of the radiating body and the central point of the square are located on the identical vertical straight line. According to the method disclosed by the invention, the cross-polarization ratio of the dual-polarization base station antenna of plus or minus 45 degrees can be obviously improved.

Description

technical field [0001] The invention relates to the field of base station antennas, in particular to an improved dual-polarized base station antenna and a method for increasing the cross ratio. Background technique [0002] In mobile communication systems, diversity technology is usually used to overcome signal fading in complex environments and improve communication quality. Among them, the polarization diversity using dual-polarized antennas is a diversity method with low cost and good effect. [0003] The dual-polarized antenna should have good orthogonal polarization characteristics, that is, within the sectoral service area of ​​±60°, the level shown by the cross-polarized pattern should be higher than the level shown by the main polarization direction at the corresponding angle There is a marked decrease in the difference between the two sets of cross-polarization ratios. Obviously, the larger the cross-polarization ratio is, the smaller the correlation between the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q13/08H01Q21/24
Inventor 褚庆昕罗宇
Owner SOUTH CHINA UNIV OF TECH
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