Abstract
This chapter discusses the theory of radio link transmission and the components that make up a system. The rapid development of semiconductor technology allowed for an equally rapid growth in the use of point-to-point radio systems. The theory of time division multiple access applicable to satellite systems is analyzed in the chapter. A radio frequency signal, received by the antenna, enters the receiver and passes through a band pass filter, to remove other interference, which may have been collected by the antenna. The automatic gain control is a very important element in maintaining the stability of the system, over a wide range of operating conditions. An important set of standards is used to regulate the interconnection of national networks and of many other sections of the communications world. These standards are issued by the International Telecommunications Union. This elliptical waveguide is relatively easy to transport, handle, and install. It is covered with a tough protective sheath, underlaid with a spongy tar-like compound to absorb moderate rough handling, and is completely weatherproof. It is found that due to the absence of joints and bends, an elliptical waveguide often provides a lower loss transmission feeder than a rectangular waveguide.
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