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Home arrow About HARTS arrow What is Amateur Radio
Whats is Amateur Radio PDF Print E-mail

Amateur radio is a hobby that people engaged in non-profit radio communications activities for the purpose of mutual communication, self-training and technical studies .

Amateur radio involves knowledge in telecommunications, engineering, science , geography, climate, emergency relief as well as knowledge of different customs and cultures. It is understood that an amateur radio station in the United States responded to 911 incidents in 2001, the South Asian tsunami in 2004 and the earthquake in northeastern Japan in 2011 , to provide communications in disaster areas . Amateur radio has a social significance.

In 1894, the Russian physicist Alexander Popov (Alexander Stepanovich Popov) made ​​the first radio receiver , in 1895 , he made ​​a device which receive electromagnetic waves emitted by lightning , in 1896 he successfully carried out 250 meters experimental communication in Petersburg University. Later, he set up a radio station for the Russian Navy.

In 1896 , the Italian engineer Guglielmo Marconi (Guglielmo Marconi, 1909 Nobel Laureate in Physics ) has mastered on the realization of radio communications given the basis of previous knowledge of electromagnetism , he successfully conducted test of 14.4 km radio communication in the UK  and get patent. In 1901, he successfully carry out a 3500 km radio communication across the Atlantic Communications (Poldhu, Cornwall, England to St John's, Newfoundland, Canada).

They are considered as the founders of the human radio communications.

In early 1900s, amateur radio stations began to appear,  in China and the United States and began to amateur radio activities, while the term "HAM" had become the synonymous of an amateur radio operators.

As human electronic technology continues to progress, the application of radio in human society is increasing. In 2006, the estimated global total number of amateur radio stations is about three million . Operation in the form of amateur radio is also very diverse , including ionospheric reflection, satellite transmission, EME lunar surface reflection , QRP minimal power radio communications and IRLP Internet connection plan.

Today, vast majority of countries has some part of their radio spectrum designated for Amateur Radio use. Generally speaking, a citizen after passing the examination will be able to get an international radio call sign from their country. The International Telecommunication Union (ITU) coordinate the issurance of calllsign. HAM legally operate their amateur radio station in the amateur radio bands. VR2 is the Hong Kong District Amateur Radio call sign prefix .

In Hong Kong , VHF 144.0 - 146.0 MHz, UHF 430 - 431.0 MHz and 435.0 - 439.8 MHz amateur radio bands are used legally for communication. In addition, 7,14,21,28,50 Mhz 7,14,21,28 Mhz HF bands and 50 MHz band are also commonly used for international amateur communications along with

As a spectrum users, legitimate operation of amateur radio licensees reflects the commitment the responsible use of radio spectrum resources.

 
  Guglielmo Marconi  and Alexander Stepanovich Popov  

marconi

a-s-popov

 

(copyright: www.nobelprize.org; www.wikipedia.org)
 
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