Abstract: This chapter introduces the concept of radio energy: how radio energy is released (transmission), how it moves from one place to another (propagation), and how it is captured again (reception). Understanding all this is indispensable for communications engineers because during the twentieth century, radio became an important means of carrying information. However, optical fibers have replaced radio to some extent, for communication among fixed locations, but for all situations in which one or both ends of a communication link may be mobile or subject to movement, radio remains the only information-bearer technology. Early radio engineers had struggled to get the maximum possible range from their systems, but today, along with a continued interest in long ranges, there is also an explosive growth in the use of short-range radio systems such as cellular radio telephones. Short-range radio enables more users to be accommodated in the same radio bands without interfering with each other. All this extensive technological development depends on the transmission, propagation, and reception of radio energy.
Publication Year: 1998
Publication Date: 1998-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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