These days radio _engineering has become a very important
branch of science solving a large number of problems associated
with economic, technological and cultural progress. Every
year, it finds ever increasing application and the number of
people using radio equipment constantly grows. Many of
these people have only rudimentary or no knowledge of radio
engineering, although modern radio equipment is often so
complicated that its effective use is impossible without some·
training.
The wide sphere of radio application in different branches
of science and technology, as well as its close connexion with
art and sport has also created a great number of radio amateurs
in all countries. Some build radio receivers, tape recorders and
TV sets, others design radio controlled models, short and
ultrashortwave transmitters or equipment for a fascinating
game called "hunting for a fox", etc.
All this increases the interest in radio engineering knowledge
on the part of an ever growing number of people. The study
of radio is, however, made more difficult for the majority of
readers as it is usually explained with the use of higher mathematics.
On the other hand, when higher mathematics is not
used, many important problems are often oversimplified and
treated without sufficient explanation and demonstration.
Moreover radio engineering is a coherent science in which everything
is interrelated and interdependent; therefore lack
of understanding of fundamental phenomena and laws prevents
the reader from fully understanding further problems.
It is far from clear what one should understand under the
name of "radio engineering,' and its fundamentals since this
branch has been extended, diversified and become interwoven
with many other branches of science and technology. Under
"radio engineering" proper one usually understands the use of
electromagnetic radiation for the obtaining of information
from a distant source. This is effected through the use of a
transmitting (radiating) device and a receiving device provided
conditions for propagation of radio waves are favourable. In
accordance with this, the book describes the operating principles
of radio transmitters, radio receivers and radiating
devices, as well as radio wave propagation. It goes without
saying that one book cannot exhaustively deal with all the varieties of existing radio circuits and devices; therefore, we
concentrate our attention only on the most important and
representative types.
Chapters 7, 8, 9 and 12 were written by N. M. Izyumov;
the rest, by D. P. Linde.
Share on Telegram
