Calculation Wi-Fi

More about Passive relay.

With the help of our calculation you can easily determine main link parameters.

How to proceed

Choose frequency range (by clicking on relevant box). Rewrite values in separate cells according to your parameter link, use only positive numbers, in decimal position put a dot!! If you do not use any of the elements (e.g. pigtail, lightning arrester...) enter 0 into the relevant cell. The results are shown immediately after each value change. You cannot enter into cells, which show results.

Calculated values

Radiated power

By this calculation you can check whether the maximum-radiated power allowed in your country is not exceeded. Allowed radiated power is different for 2,4 GHz and 5 GHz range. 5 GHz range is usually divided into several parts with different radiated power. You will find additional information in instructions for active Wi-Fi equipment and at telecommunication authority.

Receiving value

The value of received signal at the entry of the device is shown in this cell. For best function of this link it is necessary that the level is higher than sensitivity of the receiver (sensitivity is specified with particular Wifi appliance according to bit rate). Attention: sensitivity is given in negative numbers! It is also necessary to count with margin during unfavourable conditions (snow, rain, interference.)

Fresnel zone

Fresnel zone is an area where most of the power between antennas is transmitted, it is cigar shaped. If there is a barrier in this area, the transmission attenuation increases. Calculated radius is in the middle of the link and at the end it decreases.