What is Frequency ?
Frequency is the number of vibrations the signal makes per second
The signal will be electromagnetic energy has an amplitude
This amplitude increases and decreases. With the passage of time
Therefore, if we make a relationship between the amplitude that changes with time, you will find a vector shape
Some of us misunderstood that this shape is the shape of the signal passing through the air
But in fact, this is the shape of the amplitude's relationship with time
But the signal travels straight through the air after leaving the antenna
It moves at the speed of light, which is 300 million meters per second
If we have a signal with a frequency of 40 GHz, this means that it performs 40 thousand million vibrations per second.
Kilo means thousand
Mega means a million
Giga means one thousand million
Tera means a million million
As the frequency increases for any signal, it increases the power dissipation
(In a relationship between them, we will discuss it and will explain it in detail. If anyone has the relationship, I would like to add it for clarification) and this varies according to the type of material and its permeability coefficient. But by working in the microwave links, we find that the higher the frequency, the more power dissipation in the air
As the frequency increases, the wavelength decreases
The higher the frequency, the greater the coverage distance
Therefore, we use high frequencies for short distances and vice versa
The higher the frequency, the lower its ability to penetrate obstacles
Therefore, microwave links use high frequencies, provided that a clear path is achieved between the transmitter and receiver
But 2G 3G 4G 5G technology uses lower frequencies and is not a requirement to achieve a clean path, with evidence that you find your mobile bringing a network, despite the presence of many obstacles between you and the antenna in the base station
We use frequencies in microwave links in the range from 6 GHz to 80 GHz
And we use frequencies in 2G ,3G ,4G ,5G technology in the range from 800 MHz to 3500 MHz
Thank you.
