VHF-UHF Propagation Tool

VHF and UHF Area Prediction

This tool provides the ability to determine RF signal loss and shadowing for VHF/UHF (30MHz - 3GHz) systems.
A transmitter can be placed on the map below and the simulation area can be chosen. The pathloss result of the propagation analysis is overlaid on the map.

Shortcuts: Click to Zoom-to the following Capital Cities
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Complete steps 1-7.
1. Select a location on the map to place an Antenna. Lat: Lon:

2. Enter Transmitter Height (m) above ground :

3. Enter Receiver Height (m) above ground :

4. Select a Simulation area radius using the drop down box.

5. Enter a Transmit Frequency (MHz) for the Transmitter :

6. Select a Knife Edge Propagation model using the drop down box.

7.
Overlay Opacity:

To repeat steps 1-7, click on Clear Map

Auto zoom-to result.

This release version 1.1 has the choice of 4 different knife edge diffraction models
to determine pathloss estimates influenced by the terrain only.
The pathloss model does not take into account features such as buildings, bridges and other man-made structures.
Terrain data source is 90m resolution SRTM version 2.1 data for the entire Earth between the latitudes of -60 and +60.
Antenna gain for Tx and Rx antennas is set to unity.
Pathloss maximum is capped for values 170dB or greater.
Approximate simulation times range from a few seconds for 5km radius to almost 1 minute for 20km radius.
For information on understanding VHF/UHF radio propagation Click Here

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