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The famous scientist Maxwell further expressed with mathematical formulas research results Faraday and others, and the electromagnetic induction theory to the space. In his view, the change in the magnetic field around the field will produce change phone pcb board recycling, changes in the electric field around the turn generate varying magnetic fields, such as layers of the same wave pushed to go, you can put an alternating electromagnetic field travels very far. '64 Years, Maxwell made a field theory, become the first person in human history predicted the existence of electromagnetic waves. So, who confirmed the existence of electromagnetic waves have it? This person is Henrich 'Rudolph' Hertz. 1887 day in a dark room Hertz experiment. He added two high voltage closely spaced metal pellets, resulting waves will produce crackling spark discharge. Then, behind him stood a no seal ring. When Hertz put the ring tone small opening to a certain extent, we can see that there are sparks across a gap. Through this experiment, he came to the electromagnetic energy may spread beyond the space conclusions. Hertz announced after the discovery, a sensation worldwide scientific community. Of course, 1887 has become a milestone in the history of modern science and technology, in order to commemorate this outstanding scientist, an electromagnetic wave frequencies in the unit named 'Hertz (幵 magic' Hertz's discovery of epoch-making significance, it only proves Maxwell's theory right, more importantly, to promote the birth of radio, opened a new era of electronic technology, marks the transition from 'wired electric phone' to 'wireless phone' turning point, but also the entire mobile phone point of origin. It should be said, from that time , humans began to enter a new field of wireless handsets. Hertz spark by blinking the first time confirmed the existence of electromagnetic waves professional mobile phone pcb board recycling, but he categorically denied the possibility of using electromagnetic waves of mobile phones. In his view, if To make use of electromagnetic waves mobile phones, the need for a considerable area of ??the European continent giant mirror, obviously this is not possible. Hertz discovered the electromagnetic waves news spread, to Russia are engaged in a lamp promotion of youth there Popov He said excitedly: 'With my life energy to install lights on the vast Russia, just lit up a small corner, and if I can direct electromagnetic pcb board recycling of cellular phones, can overflew the whole world!' 1894, Popov improved radio receiver and add an additional antenna to greatly improve sensitivity. 1896, Popov successfully transmitted by radio Morse code, a distance of 250 meters, the message content : Haiyinlisi 'Hertz at May 18, 1897, another study of young radio Marconi improved radio transmission and reception equipment, the Bristol Channel radio phone success, the message spread. 12 km. in 1898, Britain held a yacht race phone pcb board recycling company, located in the end of 20 miles of the sea shore. "Dublin Express" distinguished Marconi as information officers. At the end of the race with his own invention. wireless telegraph spectators ashore and timely information about the outcome of the race, caused a great sensation. This is considered the first practical application of wireless phones. Then, Marconi in Britain to establish the world's first radio ^ British equipment company Marconi. In 1901, the British radio report can be sent across the Atlantic, but then the antenna is made of metal wire holding kite 1902 between England and Canada formally launched the transatlantic wireless telegraphy phone circuit, so that the international telegram phone people jump into a new stage in China, the first application of the telegram is guilty of 0 years 1 July Chunghwa Post offered postal telegraph business professional mobile phone pcb board recycling |.. Zhejiang Mobile pcb board recycling | Obo Obo electronic is supplied by Shenzhen Electronic Technology Co., Ltd. Shenzhen City Aobo Electronic Technology Co., Ltd. (www.aobodz.com) strong, credible, in other industries in Shenzhen, Guangdong has accumulated a large number of loyal customers. The company better work attitude and continuously improve innovative ideas will lead Obo electrons into the brilliant and you work for a better future!