antenna power的意思|示意

'

Antenna power, or radiated power, is the measure of power that a transmitter emits in the form of electromagnetic waves. It is usually expressed in watts and is the total power output of a transmitter, including both the power in the carrier signal and any sidebands.

Antenna power is important in determining the maximum distance an electromagnetic signal can travel. This is known as the link budget, which is calculated by adding the power of the transmitter, the path loss, and the power of the receiver. The link budget also relates to the signal-to-noise ratio (SNR), which dictates the clarity of the signal at the receiver side.

In radio and television broadcasting, antenna power is important for determining the coverage area. Increasing the power output increases the coverage area to some extent, but it is not always beneficial to increase the power output beyond the optimal. If a transmitter has too much power, it can create interference for other broadcasting systems and other electronic systems in the area.

In wireless communication systems, antenna power is an important consideration, as it determines the range of the system as well as the amount of interference it can create. The antenna power also affects the interference caused by other wireless systems.

The use of antenna power is closely related to the field strength of the transmitted signal, which is a measure of the strength of the signal in a particular area. The field strength is determined by the power of the transmitter, the antenna gain, and the distance from the transmitter.

In summary, antenna power is an important measure of the power output of a transmitter and how far it can reach. It is used to determine the coverage area of radio or television broadcasting systems and the range of wireless communications systems. It is also related to the field strength of the signal, which affects the interference caused by other electronic systems.