11
Radiation and Antennas
11.1 INTRODUCTION
The antenna is the most important device in any transmitting station. Antennas are very commonly used for radio and television broadcasting. Also, antennas are used for dedicated point-to-point radio communication, radar, wireless LAN, space exploration, etc. An antenna is a logical arrangement of several conductors also called “elements”. An antenna also called an aerial is basically a transducer. The antenna is the device that sends a radio frequency (RF) signal through the space to the receiver. This antenna is also called the transmitting antenna. An alternating current is produced by applying a voltage to the transmitting antenna elements, which causes the elements to radiate the electromagnetic ...
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