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Omnidirectional dual-polarized broadband antenna applied to indoor roof

A broadband antenna, dual-polarization technology, applied to antenna unit combinations, antennas, antenna arrays and other directions with different polarization directions, which can solve problems such as impedance matching misalignment, narrow bandwidth, and difficulty in reconciliation.

Inactive Publication Date: 2016-11-09
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difficulty of reconciling the two antenna elements together, the impedance matching is out of tune and the bandwidth is narrow

Method used

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  • Omnidirectional dual-polarized broadband antenna applied to indoor roof
  • Omnidirectional dual-polarized broadband antenna applied to indoor roof
  • Omnidirectional dual-polarized broadband antenna applied to indoor roof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] figure 1 It is a structural schematic diagram of an omnidirectional dual-polarized broadband antenna applied to an indoor roof according to an embodiment of the present invention. It contains:

[0050] pyramid antenna

[0051] like figure 1 As shown, due to the coupling between the monocone antenna and the sleeve structure loaded around the pyramid, the inner wall of the sleeve has the opposite current distribution to that of the monocone, and the outer wall has the same current distribution, thus enhancing the bandwidth of the antenna. Loading the shorting patch on top of the pyramid reduces the pyramid height. Since there is mutual coupling between the pyramid antenna and the dipole antenna, it will interfere with each other's characteristics. In order to reduce the interference to the dipole antenna array, the top-loaded short-circuit plane is dug out of a circle with the same radius as the dipole dielectric plate. form a circle. The short-circuit post connectin...

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Abstract

The invention discloses an omnidirectional dual-polarized broadband antenna applied to indoor roofs. The antenna consists of two parts: a vertically radiating pyramid antenna and a horizontally radiating dipole antenna array. A circular sleeve structure is used around the pyramid antenna to enhance the bandwidth, and the top-loaded ring is connected to the ground plane through metal shorting posts of different diameters. The feeding part uses a pyramid to connect with the SMA connector coaxial probe punched through the ground plane. The dipole antenna array arranges four arc-shaped radiation units clockwise on both sides of the dielectric substrate to form a symmetrical dipole antenna array. The circular patch in the center and the tapered microstrip line are baluns to adjust the impedance bandwidth of the dipole. By adding a resonant band around the disk, the bandwidth is widened and the roundness of the omnidirectional radiation pattern is improved. The feed part adopts central coaxial feed. The invention realizes a low-profile omnidirectional dual-polarized antenna, and solves the requirement of an indoor base station for a low-profile omnidirectional dual-polarized antenna.

Description

technical field [0001] The invention relates to the communication field, and more particularly relates to an omnidirectional dual-polarized broadband antenna applied to indoor roofs. Background technique [0002] With the development of wireless communication technology, on the basis of the development of 2G and 3G, 4G technology is also widely used. Therefore, the base station antenna is required to have the characteristics of wide frequency band, low profile, dual polarization, and omnidirectional radiation. A typical dual-polarized MIMO antenna system consists of vertically polarized pyramid antenna elements and horizontally polarized dipole antenna array elements. Since it is difficult to reconcile the two antenna elements together, the impedance matching is out of tune and the bandwidth is narrow. The bandwidth of the pyramid antenna is affected by the height of the pyramid. In order to achieve broadband characteristics, the height of the antenna is relatively high. ...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q21/00H01Q21/24
CPCH01Q1/36H01Q1/38H01Q1/50H01Q21/0006H01Q21/24
Inventor 苏明白霞刘元安王卫民吴永乐黎淑兰于翠屏
Owner BEIJING UNIV OF POSTS & TELECOMM
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