Five eighth wave antenna length calculator

How to use the calculator

1. Enter the operating frequency of your antenna in MHz in the "Frequency" field.
2. Click the "Calculate" button to calculate the antenna length.
3. The calculated antenna length in centimeters will be displayed in the "Antenna Length" field.
4. If you need to start over, click the "Reset" button to clear all input fields.

Working Principle

A five eighth wave antenna is an antenna whose length is approximately five eighth of the wavelength of the operating frequency. The wavelength (λ) can be calculated using the formula λ = c / f, where c is the speed of light (approximately 3 x 10^8 meters per second) and f is the frequency in hertz. Since 1 meter = 100 centimeters, the formula for the length of a five eighth wave antenna in centimeters is approximately 187.5 / f, where f is the frequency in MHz.

Example

If you want to calculate the length of a five eighth wave antenna for an operating frequency of 900 MHz:

Length = 187.5 / 900 = 0.208 cm

Therefore, the length of the five eighth wave antenna for an operating frequency of 900 MHz is approximately 0.208 cm.