RF communication distance calculation tool (RF Calculators)

The RF communication distance calculation tool calculates the link margin based on transmit power, cable attenuation and antenna gain. Radio frequency (RF) is the abbreviation of Radio Frequency, which represents electromagnetic frequencies that can be radiated into space. The frequency range is from 300KHz to 30GHz. Radio frequency is abbreviated as RF. Radio frequency is radio frequency current, which is the abbreviation of a high-frequency alternating electromagnetic wave. Alternating current that changes less than 1,000 times per second is called low-frequency current, and alternating current that changes more than 10,000 times is called high-frequency current, and radio frequency is such a high-frequency current. The cable TV system uses radio frequency transmission.

In electronics theory, when current flows through a conductor, a magnetic field will be formed around the conductor; when alternating current passes through a conductor, an alternating electromagnetic field will be formed around the conductor, called electromagnetic waves.

When the electromagnetic wave frequency is lower than 100khz, the electromagnetic wave will be absorbed by the surface and cannot form effective transmission. However, when the electromagnetic wave frequency is higher than 100khz, the electromagnetic wave can propagate in the air and be reflected by the ionosphere at the outer edge of the atmosphere, forming long-distance transmission capabilities. , we call high-frequency electromagnetic waves with long-distance transmission capabilities radio frequency, the English abbreviation: RF.

link margin

Transmit power:16.0dBm

Transmitter cable attenuation: 0.0dB

Transmitter antenna gain: 14.0dBi

Space loss:119.3dB

Receiver antenna gain: 15.0dBi

Receiver cable attenuation: 0.0dB

Reception sensitivity: -83.0dBm

calculate

Link margin: 8.7dBm