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The origins of radio communications are in the
19th century.
- 1864 James Clerk Maxwell presented the
Maxwell Equations for electromagnetic
radiation
- 1876 Alexander Graham Bell invented the
telephone.
- 1887 Heinrich Hertz discovered "hertzian
waves" which are now called as radio
waves.
- 1896 Guglielmo Marconi carried out the
world?s first radio transmission.
At the beginning of our century, e.g. the police
forces in Europe and in the US were using radio
telephony equipment. During the 50?s and 60?s,
first radio telephone networks were introduced for
public customers in the US.As the radio telephony
services became more popular, the insufficient
availability of radio frequencies became obvious.
At the 60?s and 70?s, new technologies like
dynamic channel allocation and cell-based networks
were developed in order to decrease the congestion
in the radio frequencies. In the 80?s, several
analogue cellular radio networks entered to
service around the world. Each country has
proceeded in its own way in adopting standards for
these networks. These standards are not mutually
incompatible.Later international standards, like
GSM, were introduced.
- United
States Early Radio History - An assortment
of highlights -- plus a few lowlifes -- about
early U.S. radio history. Articles and
extracts about early radio and related
technologies, concentrating on the United
States in the period from 1897 to 1927.
- The
Broadcast Archive - We hope this will
become one of your favorite links to broadcast
history. The goal is to continue adding
historical materials on both pioneer and
current broadcast radio stations, as well as
links and references to other locations
containing accurate materials on broadcasting.
While the emphasis is on professional
broadcasting, especially radio, certainly
there are some important links to early
amateur broadcasting, as well as various
companies where the value of radio was
exploited.
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