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
it works
it works
it works