Appendix D. Radio Signal Propagation; Introduction - Black Box LW0050A Manual

PRO 11 SERIES WIRELESS ETHERNET
Appendix D. Radio Signal
D.1 Introduction
This section explains and simplifies many of the terms relating to antennas and RF
(Radio Frequency) used when dealing with an RF installation system.
The following diagram depicts a typical radio system.
Information
(Data/Voice) to Be
Transmitted
A radio system transmits information to the transmitter. The information is
transmitted through an antenna, which converts the RF signal into an
electromagnetic wave. The transmission medium for electromagnetic wave
propagation is free space.
The electromagnetic wave is intercepted by the receiving antenna, which converts
it back to an RF signal. Ideally, this RF signal is the same as that originally
generated by the transmitter. The original information is then demodulated back
to its original form.
118
Propagation
Transmitting
Antenna
Transmitter
Figure D-1. A Typical Radio System.
Receiving
Antenna
Medium
Receiver