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Antenna device and multi-antenna system

An antenna device and sector antenna technology, applied in diversity/multi-antenna systems, antennas, antenna arrays, etc., can solve problems such as radio wave interference and inaccurate wireless signal transmission, achieve low antenna loss, prevent radio wave interference, and improve cost-effective effect

Inactive Publication Date: 2012-03-28
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In a communication system such as an omnidirectional cell system or a sectoral cell system in which an antenna is installed for each cell, when a phenomenon that radio waves arrive at a cell from another cell (i.e., crossover) occurs, if the same frequency, there will be radio wave interference in another cell, so that the radio signal cannot be transmitted accurately

Method used

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  • Antenna device and multi-antenna system
  • Antenna device and multi-antenna system
  • Antenna device and multi-antenna system

Examples

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Embodiment Construction

[0047] Hereinafter, a multi-antenna system according to an embodiment of the present invention will be explained with reference to the accompanying drawings. The multi-antenna system according to the present invention can be used in place of the multi-antenna system of an omnidirectional antenna system performing wireless communication by MIMO.

[0048] image 3 The configuration of the multi-antenna system according to this embodiment is shown. The multi-antenna system according to this embodiment includes an antenna device 10 and a wireless base station device 20 connected to the antenna device 10 .

[0049] First, the antenna device 10 will be described. Such as image 3 As shown, the antenna device 10 includes four sector antennas 11 for radiating antenna beams 30, a support cylinder 12 installed in the vertical direction (z-axis direction), and protruding from the support cylinder 12 to support the sector antenna 11 support members 13 .

[0050] Figure 4 is a top v...

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Abstract

Provided is an antenna device, which has excellent cost performance and a small antenna loss and can eliminate radio wave interference, for wireless communication employing an omni-cell system, wherein a plurality of data associated with each other are transmitted at the same time. The antenna device has a plurality of sector antennas (11) which are disposed such that the maximum radiation directions wherein the radiation intensity of the radio waves is at maximum are arranged in the radial state, and the sector antennas (11) transmit at the same time a plurality of wireless signals associated with each other.

Description

technical field [0001] The present invention relates to an antenna device for simultaneously transmitting a plurality of radio signals corresponding to each other from a plurality of antennas, and a multi-antenna system. Background technique [0002] For wireless communication, there is a communication system that divides a communication area into a plurality of cells (areas) and locates a base station for each cell. The communication system includes an omnidirectional cell system and a sector cell system. According to the omnidirectional cell system, an omnidirectional antenna is installed as a non-directional antenna, and radio waves are radiated from the omnidirectional antenna in all directions. According to the sector cell system, one cell is divided from the center into a plurality of sector cells, and a sector antenna as a directional antenna is installed for each sector cell. In other words, the sectorized cell system performs wireless communication by using one ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/28H04B7/04
CPCH01Q25/00H01Q21/08H01Q21/20H01Q21/06H01Q1/246H01Q21/205
Inventor 田边浩介
Owner NEC CORP
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