antenna effective area的意思|示意

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Antenna effective area, or simply effective area, is a measure which characterizes the performance of an antenna in a given direction. It is a measure of the ability of an antenna to transmit or receive energy in a given direction. It is usually expressed in square meters and is a measure of the power of the antenna to propagate the incident waves within a given frequency range.

In an antenna system, the effective area is computed by dividing the total power that an antenna can radiate or receive in any direction, by the incident power per unit area. The total power of the antenna is usually measured in milliwatts. The effective area is usually measured in terms of the number of transducers (or “elements”) on the antenna. The number of transducers determines how much power the antenna can transmit or receive in a given direction, and thus its effective area.

An antenna's effective area is important because it determines performance in various areas. For example, the effective area determines the antenna's gain, which is a measure of the antenna's ability to transmit energy in a given direction. It also determines the antenna's efficiency, which is the amount of energy that is actually used by the antenna in performing its task. The effective area is also important for evaluating the antenna's radiation pattern, which is a graphical representation of how the antenna transmits energy in a given direction.

In summary, effective area is a measure of the ability of an antenna to transmit or receive energy in a given direction. It is usually expressed in square meters and is computed by dividing the total power of the antenna by the incident power per unit area. It is important for determining the antenna's gain, efficiency, and radiation pattern.