Differential broadband dual-polarized base station antenna with improved cross-polarization ratio

A base station antenna and wide-band technology, applied in the field of wireless mobile communication, can solve the problems of large size, not reaching half-power beam width, complex shape of reflector, etc., and achieve the effect of high differential signal isolation, high gain and stable gain

Active Publication Date: 2018-06-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shape of the reflector of this antenna is too complicated, the size is large, and the appropriate half-power beam width is not achieved, and the cross-polarization ratio within 60 degrees of the horizontal plane is not discussed.

Method used

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  • Differential broadband dual-polarized base station antenna with improved cross-polarization ratio
  • Differential broadband dual-polarized base station antenna with improved cross-polarization ratio
  • Differential broadband dual-polarized base station antenna with improved cross-polarization ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 and figure 2 As shown, the differential broadband dual-polarized base station antenna of this embodiment includes a reflector 1, a cross-shaped feed structure 2, a support structure 3, four radiation units and four coaxial lines;

[0041] The reflector 1 is a square box-shaped structure, and the reflector 1 has a flanging 4, and the flanging 4 forms a square box-like structure in the reflector 1. The side lengths of the reflector 1 are Lg1, height is H1, the side length of flanging 4 is Lg2, and the height is H2. Reflector 1 is used to form a better and stable radiation pattern, gain and half-power beam width in the entire bandwidth. The chemical ratio has been greatly improved;

[0042] The shape of the support structure 3 is a cylinder, which is arranged between the reflector 1 and the four radiation units, and is located in the center of the square box-shaped structure surrounded by the flange 4, and is used to support the four radiation units;

...

Embodiment 2

[0051] Such as Figure 11 As shown, the main features of this embodiment are: the shapes of the four radiating units (the first radiating unit 5, the second radiating unit 6, the third radiating unit 7 and the fourth radiating unit 8) are all processed by corner cutting The other parts are the same as in Embodiment 1, and the target characteristics can also be achieved, meeting the requirements of the base station antenna for various parameters.

[0052] In the above embodiment, the reflector 1 and the flange 4 are both made of aluminum alloy, the support structure 3 is made of polytetrafluoroethylene plastic (the king of plastics "Teflon"), and the cross-shaped feed structure 2 and four radiating elements are made of copper material.

[0053] In summary, the differential broadband dual-polarized base station antenna of the present invention has the characteristics of wide frequency band, high cross-polarization ratio, and high isolation, and realizes a stable radiation patte...

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Abstract

The invention discloses a differential broadband dual-polarization base station antenna for improving a cross polarization ratio. The antenna comprises a reflecting plate, a cross feed structure, four radiation units and four coaxial lines, wherein after the upper ends of the four coaxial lines penetrate through the reflecting plate, outer conductors at the upper ends of the four coaxial lines are connected with the four radiation units in a one-to-one correspondence mode, and an inner conductor at the upper end of each coaxial line penetrates through the corresponding radiation unit and then is connected with the cross feed structure; the lower ends of the four coaxial lines are connected with SMA (Styrene Maleic Anhydride) heads; the four coaxial lines form two pairs of differential feed ports, the four radiation units form two pairs of dipoles, and the two pairs of differential feed ports feed the two pairs of dipoles. The antenna has the characteristics of broad band, high cross polarization ratio and high isolation, realizes stable radiation patterns, stable half-power beam width and stable gains, and has simple structure and good performance; and the service life of the antenna can be prolonged by adopting a cast structure.

Description

technical field [0001] The invention relates to a differential broadband dual-polarization base station antenna, in particular to a differential broadband dual-polarization base station antenna with improved cross-polarization ratio, belonging to the technical field of wireless mobile communication. Background technique [0002] In the past 20 years, the mobile communication industry has achieved rapid development. As of the beginning of 2012, the number of mobile phone users in the world reached 6 billion. According to statistics from the Ministry of Industry and Information Technology of China, as of the end of March 2013, China had a total of 1.146 billion mobile communication service users. According to data from the International Telecommunication Union, in early 2014, there were more than 7 billion mobile phone users worldwide. The development of the mobile communication industry in the future will be immeasurable, and it will have a significant impact on the national...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/50H01Q21/24H01Q19/10H01Q1/12H01Q15/14
Inventor 涂治红贾凯歌柳炎炎
Owner SOUTH CHINA UNIV OF TECH
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