The wireless calculator is for outdoor wireless deployment reference only and contains the following functions:

Wi-Fi Link Budget Calculation the reference of WLAN Backbone System or WLAN Surveillance System (PtP link)
Fresnel Zone Calculation the reference of WLAN Backbone System or WLAN Surveillance System (PtP link)
Antenna Downtilt Calculation the reference of WLAN Internet Surfing Coverage System.
Downtilt Coverage Calculation the reference of WLAN Internet Surfing Coverage System.

The calculated results provided are based on the assumption of radio Line-of-Sight (LoS) and thus it only takes into account the free space path loss and cable loss based on your input values. If you have a long radio link, you will need to take all effects (e.g. earth's curvature, refractive index, and more) into account. The final value represents a first order approximation and should only be used as a guide. No guarantees or warranties are implied accordingly.

Note:
The Line-of-Sight (LoS) between radios is required and at least 80% clear of any obstruction in the Fresnel Zone is recommended.

The path between two antennas is referred to as the Line-of-Sight (LoS).
The Fresnel Zone referenced in the diagrams below is an electromagnetic phenomenon, where radio signals get diffracted or bent from solid objects near their path.

There are three main categories of Line of Sight for reference:

  1. Line of Sight (LoS): No obstacles reside between the two antennas; the link can be established and is reliable.
  2. Near Line of Sight (nLoS): Partial obstructions such as tree tops between the two antennas are included. The link may be established with lower performance, but may not be stable.
  3. Non Line of Sight (NLoS): Where full obstructions exist between the two antennas, the link is difficult to establish.