First analysis in under 2 minutes

No account required. No install. FresnelPath runs in the browser and the core analysis tools are free.

Free tier · No login required for core analysis

Open the analyzer

Navigate to /app. The analyzer loads with a 3D terrain map. No sign-in prompt — core analysis is free and immediate.

The hosted version processes analyses on the server using Copernicus GLO-30 elevation data and the propagation engine described in the methodology.

Pick your country and workflow

The top bar has a country selector. Selecting a country automatically resolves the correct LoRaWAN regional parameters (frequency band, EIRP limit, duty cycle) so you don't have to look them up.

Select your workflow mode in the left sidebar: Node Link for a single gateway-to-node path analysis, or Gateway Placement for coverage area planning.

Example

Portugal → EU868 · 868 MHz · 16 dBm EIRP · 1% duty cycle

Brazil → AU915 · 915 MHz · 30 dBm EIRP · FCC Part 15 dwell

Place your gateway

Click on the 3D map where the gateway will be installed, or paste coordinates directly into the Gateway form. Set the antenna height above ground level — this matters a lot in terrain that undulates.

For Node Link analyses, place the sensor node the same way. For coverage planning, the gateway position defines the analysis center point for the regional sweep.

Configure RF parameters

The RF settings bar lets you adjust:

FrequencyAutofilled from your country's LoRaWAN plan; you can override for backhaul or custom deployments.
SFSpreading factor SF7–SF12. Higher SF = more range but slower transmission and more airtime.
TX PowerGateway transmit power in dBm, capped at the regional EIRP limit.
AntennaSelect from the built-in antenna database or enter a custom gain figure.

The propagation model is auto-selected based on the terrain you've placed. You can force a specific model (ITM, P.1812, P.1546) from the Model tab in the results drawer.

Run the analysis and read the verdict

Click Analyze. The backend fetches terrain elevation, selects the appropriate diffraction method, runs propagation, and returns results in a few seconds.

The results drawer on the right shows five tabs:

Verdict

Go/no-go + which SFs close

Profile

Terrain, LoS, Fresnel zone

Budget

Link budget breakdown

Model

Which model ran + why

Report

Exportable analysis

The Verdict tab tells you which spreading factors are viable and what the link margin is. A positive margin means the link closes; how much margin you need depends on your deployment's fade requirements.

Export or share

The floating export menu (bottom-right of the map) offers:

PNG path profile — terrain cross-section with Fresnel zones annotated, ready for a client report or site-survey pack
KML / GeoJSON — gateway and node positions for import into field mapping apps
PDF report — full engineering report with link budget, equipment basis, propagation model citation, and regulatory basis (Pro)
Share link — a public permalink at /s/{'{'}slug{'}'} for sharing the live analysis with colleagues or clients (Pro)

Save your project to revisit it later. Saved projects persist your gateway position, RF parameters, and analysis results. Free accounts get 10 saved projects.