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Diversity antenna assembly with function of multiple inupts and outputs in wireless communication base station

A wireless communication and diversity antenna technology, applied in diversity/multi-antenna systems, antennas, antenna arrays, etc., can solve problems that are not suitable for wireless MIMO channel diversity reception and transmission

Inactive Publication Date: 2008-08-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the Chinese patent CN1444413A "Adaptive Antenna Base Station Device" granted to Gao Ming on the shore, an adaptive antenna base station device is disclosed, which is not suitable for diversity reception and transmission of wireless MIMO channels

Method used

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  • Diversity antenna assembly with function of multiple inupts and outputs in wireless communication base station
  • Diversity antenna assembly with function of multiple inupts and outputs in wireless communication base station
  • Diversity antenna assembly with function of multiple inupts and outputs in wireless communication base station

Examples

Experimental program
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Effect test

Embodiment 1

[0118] Embodiment 1: A base station diversity antenna device composed of a four-element Yagi antenna with a cylindrical shared reflector

[0119] Figure 10 It is a top view of the multi-antenna device, which consists of four pairs of directional antennas uniformly distributed around the antenna support rod in the azimuth direction and a cylindrical shared reflector fixed around the antenna support rod.

[0120] Among them, 8 is a common metal reflector surrounding and fixed on the antenna support rod 2, with a diameter of 5.4 wavelengths. On the one hand, it serves as the public reflector of the Yagi antenna, on the other hand, it plays a role in enhancing scattering and can strengthen the antenna device. 1 is an antenna bracket, 2 is an antenna support rod, 3 is a directional antenna, and x and y are coordinate axes. The directional antenna 3 employs a similar image 3 The four-element Yagi antenna, whose center frequency is 2.15GHz, uses a coaxial cable to connect the act...

Embodiment 2

[0126] Embodiment 2: A base station diversity antenna device composed of four-element Yagi antennas without a shared reflector

[0127] figure 1A top view of a diversity antenna composed of four-element Yagi antennas without a common reflector as a second embodiment of the present invention. Wherein, 1 is an antenna bracket, 2 is an antenna support rod, 3 is a directional antenna, and x and y are coordinate axes. The directional antenna 3 employs a similar image 3 The four-element Yagi antenna with a center frequency of 2.15 GHz uses a coaxial cable to connect the active unit 4 and the receiver or transmitter to form a feeding device. The antenna support in the diversity antenna device is used to support the antenna device, and the distance between the reflectors of two opposite Yagi antennas is 5.4 wavelengths.

[0128] figure 1 The H-plane far-field pattern of a pair of quadruple Yagi antennas in Figure 15 , figure 1 The E-plane far-field pattern of a pair of four-el...

Embodiment 3

[0132] Embodiment 3: Diversity antenna device composed of four-element Yagi antennas with external electromagnetic scatterers and no shared reflector

[0133] The third embodiment of the present invention is based on the second embodiment, in figure 1 An electromagnetic scatterer 9 is placed near the diversity antenna composed of four-element Yagi antennas without a shared reflector, and its schematic diagram is shown in Figure 11 , four pairs of directional antennas are evenly distributed around the antenna support pole along the azimuth direction, and a plurality of external electromagnetic scatterers 9 are placed near the directional antennas. Wherein, 1 is an antenna bracket, 2 is an antenna support rod, 3 is a directional antenna, and x and y are coordinate axes. The directional antenna 3 employs a similar image 3 The four-element Yagi antenna with a center frequency of 2.15GHz uses a coaxial cable to connect the active unit and the receiver or transmitter to form a f...

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Abstract

Basic scheme of the invention is composed of antenna boom and at least three sets of directed antenna (or directed antenna array) distributed around support bar of antenna boom along direction of orientation. Based on the said basic scheme, each improved scheme in the invention can be constituted through following methods: adding additional electromagnetical scatterers round antenna; installing metal reflection surface on top of antenna assembly; shared reflector round bracket of antenna; or using switchable antenna array instead of directed antenna. Features are: low spatial correlation, fine performance, simple structure and easy of manufacturing. The invention can be widely applied for wireless communication for obtaining space diversity, angle diversity or polarization diversity of radio wave propagation, or in use for transmitting or receiving time-space coding or multiple inputs and outputs wireless communication system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication diversity antennas, and in particular relates to the diversity antenna technology of multiple-input multiple-output (MIMO) wireless communication base stations. Background technique [0002] Due to the rapid development of wireless communication, the number of users is increasing day by day, and the data service is constantly increasing. It is an urgent task for communication workers to further improve the capacity and quality of the current wireless communication system. The conventional single-send and single-receive system has been unable to meet the demand for large system capacity. , a new technical solution must be sought. Multiple-Input-Multiple-Output (MIMO) technology is a new wireless communication technology that utilizes multiple transmitting and multiple receiving antennas. The transmitted data stream is separated into multiple sub-data streams, which are simultaneously...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H01Q21/00H01Q19/10
Inventor 聂在平李忻张熙瑜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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