Radio Horizon Calculator

How to Use This Calculator

1. Enter the frequency of your radio transmission in MHz (e.g., 1 MHz for AM radio, 100 MHz for FM radio).
2. Enter the height of your transmission antenna above ground level in meters.
3. Click the "Calculate" button to compute the radio horizon distance.
4. The result will be displayed in kilometers.

Working Principle

The radio horizon is the maximum distance at which radio waves can be propagated from an antenna to a receiver in the line of sight. It depends on the frequency of the radio waves and the height of the antennas.

The formula used in this calculator is:

Radio Horizon Distance (km) = √(2 × height(m) + (λ/4π)² × 2)

Where:

• height = Height above ground level in meters
• λ = Wavelength = speed of light/frequency
• c = Speed of light = 299,792,458 meters per second

Practical Applications

This calculator is useful for:

• Planning radio communication systems
• Determining the coverage area of radio transmitters
• Understanding the limitations of radio wave propagation
• Designing radio communication networks

Note: This calculation assumes line-of-sight propagation and does not account for atmospheric conditions, terrain obstacles, or signal reflection.