Bidirectional antenna, wireless access point and train control system

A wireless access point, two-way antenna technology, applied in the field of two-way antenna, wireless access point and train control system, can solve the problems of high installation and maintenance costs, large size of the antenna system, finding installation space, etc., to reduce installation costs. and maintenance costs, reducing the size of the antenna, and the effect of easy processing

Inactive Publication Date: 2015-04-15
SIEMENS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the combination of two directional antennas in this structure results in a bulky antenna system that is often difficult to install, especially in tunnels where it is difficult to find sufficient installation space
Moreover, this structure also requires power splitters and various installation components, which also leads to higher installation and maintenance costs.

Method used

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  • Bidirectional antenna, wireless access point and train control system
  • Bidirectional antenna, wireless access point and train control system
  • Bidirectional antenna, wireless access point and train control system

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Embodiment Construction

[0038] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to illustrate the present invention, and are not used to limit the protection scope of the present invention.

[0039] figure 1 It is a schematic diagram of a first structure of a bidirectional antenna according to an embodiment of the present invention.

[0040] like figure 1 shown, the antenna includes:

[0041] substrate (1);

[0042] Two mutually parallel dipoles (2), each of which includes two arms printed on the bottom surface and the upper surface of the insulating substrate, respectively, and the distance between the two dipoles is λ / 2, wherein λ is the target wavelength of the antenna, that is, the preset wavelength of the wireless signal transmitted by the anten...

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PUM

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Abstract

An embodiment of the invention discloses a bidirectional antenna. The bidirectional antenna comprises a substrate, two mutually-parallel dipoles, balance microstrip lines and a balance-unbalance converter. Each dipole comprises two arms which are respectively printed on the top face and the bottom face of the substrate, and the distance between the dipoles is lambda / 2; the balance microstrip lines are printed on the top face and the bottom face of the substrate and used for feeding the two dipoles; the balance-unbalance converter is connected with the balance microstrip lines and used for performing impedance matching on the two dipoles. The invention further discloses a wireless access point and a train control system comprising the bidirectional antenna. A bidirectional high-gain antenna function is realized through the antenna of the structure with the two dipoles. Compared with a bidirectional antenna formed by connecting two directional antennas via a power divider in a traditional method, the bidirectional antenna has the advantages that components such as the power divider can be omitted, the size of the antenna is reduced, and manufacturing, mounting and maintenance cost is lowered.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a bidirectional antenna, a wireless access point and a train control system. Background technique [0002] The train control system is a system that controls the running direction, running interval and running speed of the train to ensure the safe operation of the train and improve the operating efficiency, which is referred to as the train control system. In various train control systems, radio communication is often required between a moving train and a stationary signal and control system. Wireless Access Points (APs) can be arranged at predetermined intervals along the track, and can roam within the coverage of these APs as the train travels along the track. The wireless access points are usually connected to the backbone network, which is connected to the signal and control system, thus enabling radio communication between the train and the signal and control system. [0...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q13/08H01Q21/12H01Q23/00
Inventor 王力蓝培劳森·约翰纳斯
Owner SIEMENS CHINA
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