Directivity Gain A directive gain is a measure of how well a directive antenna (a specific type of antenna) can radiate radiation in a specific direction. I...
Directivity Gain
A directive gain is a measure of how well a directive antenna (a specific type of antenna) can radiate radiation in a specific direction. It is essentially a measure of how well the antenna focuses its energy in a particular direction.
Key Points:
Directivity gain is a ratio of the power density radiated in a specific direction to the power density radiated in the worst direction.
It is measured in units of dBi (decibels).
A larger directive gain indicates that the antenna can radiate more radiation in a specific direction.
A higher directive gain often means the antenna is better at focusing its energy in a particular direction.
For example, a high-gain directive antenna like a directional antenna will have a higher directive gain than a low-gain antenna like a parabolic dish antenna.
Examples:
A directional antenna for radio broadcasting has a high directive gain in the direction of the broadcast signal.
A small directive antenna is used in a flashlight to concentrate the light output in a narrow beam.
A large antenna used in satellite communication has a high directive gain to distribute the signal to multiple receivers