Define each of the following as applied to antennas:
(i) front-to-back ratio;
(ii) gain.(4 marks)June/July 2020
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Define each of the following as applied to antennas:
(i) front-to-back ratio;
(ii) gain.(4 marks)June/July 2020
(i) Front-to-back ratio: The front-to-back ratio is a measure of the directivity of an antenna. It is defined as the ratio of the power received by the antenna when it is facing the signal source, to the power received by the antenna when it is facing away from the signal source. The front-to-back ratio is expressed in decibels (dB).
(ii) Gain: Gain is a measure of the increase in signal strength that an antenna provides compared to a reference antenna. It is defined as the ratio of the power received by the antenna to the power received by the reference antenna, and is expressed in decibels (dB). The gain of an antenna is determined by its shape and size, and is a measure of its ability to focus the transmitted or received signal in a particular direction.