Waveguide is a kind of metal catheter with smooth inner wall and hollow features. Its main function is to transmit ultra-high-frequency electromagnetic waves, and to transmit pulses through the waveguide can ensure the completion of signal transmission task with a great reduction of signal loss.For now, waveguides come in the form of circles, radars, light and rectangles.When it is used in wireless data transmission, it not only has higher reliability and lower loss, but also has very high anti-interference.In practical applications, a wireless receiver can be installed near the waveguide equipment to receive the crack radiation signal, and after certain processing, it can obtain more effective data information.
The application and prospect of waveguide technology in subway signal system
The signal system using waveguide technology was first introduced in 2003 as a ground-mounted design scheme in the Singapore North-East line signal project.The first wave guide technology applied in China was the signal system of "blanking" reconstruction project of Beijing metro line 2 in 2006, which adopted the design scheme of tunnel top installation, and it was also the first tunnel top installation design in the world.In 2006, the design scheme of waveguide ground installation was adopted for the entire capital airport line.
With the development of urbanization in China, the urban population is increasing and the pressure of travel is increasing.In this case, subway has become a very important way for people to go out on a daily basis, which has led to the construction of many urban subway projects.In the case of continuous application and development of subway wireless communication technology, waveguide is a very important signal transmission equipment. We need to make good use of this equipment to better realize efficient and stable operation of subway.
The application prospect of waveguide technology in high-speed railway signal system
China leads the world in high-speed rail, and its economic and social benefits are attracting attention.China's high-speed rail construction technology is world-class, and it adheres to the construction philosophy of "functional, systematic, advanced, cultural and economic", and vigorously promotes independent innovation.
According to the voice of China central radio news, 55% of all high-speed rail tunnels between xi 'an and chengdu will be opened soon, especially 95% when the line crosses the qinling mountains.For the first time, the xicheng high-speed railway is equipped with 4G signal equipment to meet passengers' communication needs on the way.At present, the network coverage of the three operators, namely, China mobile, China telecom and China unicom, has been in place, realizing the full coverage of public communication network signals in the tunnel and becoming the first mountain high-speed railway with full coverage of 4G signal equipment in China.
In the future, with the comprehensive development of the national high-speed railway and the comprehensive expansion of the high-speed railway network, the network coverage of high-speed railway will be better applied and developed.When taking high-speed rail, passengers can not only enjoy the beautiful scenery along the way, but also enjoy barrier-free Internet service, which adds more pleasant experience to the high-speed rail journey.
As a kind of wireless signal transmission medium with characteristics of wide transmission band, low transmission loss, high reliability and strong anti-interference ability, waveguide technology will be more widely applied and developed.
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