This tool helps you calculate the optimal length for your dipole antenna based on your desired frequency.

## How to Use the Dipole Antenna Calculator

This dipole antenna calculator helps you determine the optimal lengths of half-wave and quarter-wave dipole antennas based on the input frequency. Simply enter the frequency in MHz, velocity factor (optional), and initial gain (optional) to calculate.

### Steps to Use:

- Enter the frequency in MHz in the designated field.
- Optionally, enter a velocity factor (default is 0.95).
- Optionally, enter the initial gain (default is 2.15 dB).
- Click the “Calculate” button.
- The calculated lengths for half-wave and quarter-wave dipole antennas will be displayed.

### How it Calculates:

The calculator uses the speed of light (approximately 299,792,458 meters/second) and the entered frequency to calculate the wavelength. The velocity factor adjusts the wavelength to account for the medium’s properties. The resulting wavelength is then divided by 2 for the half-wave length and by 4 for the quarter-wave length.

### Limitations:

- Input frequency must be a positive number.
- Velocity factor should be between 0 and 1.
- The calculation assumes a vacuum for the speed of light unless modified by the velocity factor.