Engineering inputs
Set the engineering assumptions and design parameters.
Link inputs
km
GHz
dBm
dB
dBi
dBi
dB
dB
dBm
%
m
Engineering results
Review calculated capacity, limits and design checks.
Calculated result
Estimated received signal— dBm
—WIRELESS PLANNING TOOL
Calculate EIRP, free-space path loss, received signal, fade margin and Fresnel-zone clearance for a point-to-point wireless link.
Set the engineering assumptions and design parameters.
Review calculated capacity, limits and design checks.
Use this calculator for 2.4, 5, 6, 11, 24 or 60 GHz line-of-sight planning. It combines radio power, feeder and antenna data with free-space loss, a manual additional-loss allowance and a single-position first Fresnel-zone check.
EIRP is transmit power minus transmit feeder loss plus transmit antenna gain. The engine then subtracts free-space path loss, manual additional loss and receive feeder loss, and adds receive antenna gain.
FSPL describes unobstructed free space; it is not a complete terrain, diffraction, rain, gas, foliage or interference model.
Fade margin is received level minus the entered receiver sensitivity. The 10 dB and 20 dB status bands are planning screens only. Required margin depends on the target modulation, availability, geoclimate, multipath and precipitation statistics.
The tool calculates the first Fresnel radius at one obstacle position and compares actual clearance with 60% of that radius. A route survey must still model the full terrain profile, Earth curvature, refraction, structures and vegetation growth.
Rain and atmospheric gases become important on many microwave and millimetre-wave paths; near 60 GHz, oxygen absorption must be entered as additional loss. Computed EIRP is not a compliance decision—check local band, power, antenna and licensing rules.
There is no universal margin. Choose it from the target availability, frequency, path length, climate, terrain and the receiver threshold for the required modulation and throughput. The 10 dB and 20 dB badges are screening levels, not availability guarantees.
No. It is a manual combined allowance. Estimate rain, atmospheric gas, foliage, radome, polarization, alignment and other losses with an applicable model or measurement, then enter their total here.
No. The tool only adds transmit power and antenna gain and subtracts transmit-side loss. Check the band, channel, bandwidth, antenna rules, licensing and EIRP or power limits for every jurisdiction and link endpoint.
No. The radius is calculated only at the entered obstacle position. A complete path profile must include terrain, buildings, future vegetation, Earth curvature and atmospheric refraction along the whole route.
Use the vendor threshold for the modulation, coding rate, channel width and throughput you intend to sustain, not merely the most sensitive low-rate value. Also verify polarization, antenna alignment and interference on site.
Confirm the design with current equipment data, a terrain profile, spectrum measurements and an on-site alignment and throughput test.
ENGINEERING WORKFLOW
Estimate Wi-Fi coverage and client capacity, verify RF link margin, then validate PoE delivery and access-switch uplink capacity.