1、 Antenna principle 1.1 definition of antenna： A device that can effectively radiate electromagnetic waves in a specific direction of space or effectively re……

May 17, 2020 is the 51st world telecommunication and information society day. The International Telecommunication Union (ITU) has determined that this year's theme is“Connectivity goal 2030: using ICT to promote the achievement of sustainable developm

As one of the three foundations of information technology, sensor technology is a high-tech developed by countries all over the world. In recent years, the global sensor market has maintained rapid growth. With the continuous improvement of the e

On May 27, the 2020 Everest elevation survey mountaineering team successfully climbed the world's first peak, Mount Everest. They will erect targets at the peak, install GNSS antennas and carry out various peak measurements. The Everest altimetry will

In the traditional mass production, a garment requires an order quantity of thousands or even tens of thousands of pieces, so that the factory is willing to take orders for production, and can afford experienced workers and quality guaranteed fabrics. Aft

With the continuous increase of the number of Internet of things devices, the communication or connection between these devices has become an important thinking topic. Communication is very common and key to the Internet of things. Both short-range wirele

one5g still has a long way to go This year is the first year of 5g large-scale commercial development and the first year of 5g era (2020-2030). The curtain of 5g commercial development has just opened, and the road behind is still very wide and l

At 9:43 on June 23, China successfully launched the 55th Beidou navigation satellite with a long march 3B carrier rocket at Xichang Satellite Launch Center. The satellite has successfully entered the predetermined orbit. In the follow-up, orbit change, on

just The last global networking satellite of beidou-3 Fire up and take off! This is the third geostationary orbit satellite of beidou-3 global satellite navigation system. With the completion of the satellite in the "big chess game" of bei

At 9:43 today (June 23), the last global networking satellite of Beidou 3 was ignited and lifted off at Xichang Satellite Launch Center. The satellite was in normal condition and the launch mission was a complete success.The deployment of beidou-3 global

On the morning of June 23, the last global networking star of Beidou 3 was successfully launched. From its launch in 2009 to today's 30th satellite, the completion of the beidou-3 system marks the successful conclusion of the "three-ste

Escort intelligent high speed railway Beijing Zhangjiakou high speed railway is the first intelligent high speed railway in the worldBeidou navigation systemAnd other cutting-edge technologies, the intelligent Fuxing EMU with a speed of 350 km /