Enter the circumference of the helix and the wavelength of the signal into the calculator to determine the length of the helical antenna; this calculator can also evaluate any of the variables given the others are known.

## Helical Antenna Formula

The following formula is used to calculate the length of a helical antenna:

L = C * λ / (4 * π)

Variables:

- L is the length of the helical antenna
- C is the circumference of the helix
- λ is the wavelength of the signal
- π is a mathematical constant (approximately 3.14159)

To calculate the length of a helical antenna, multiply the circumference of the helix by the wavelength of the signal. Divide the result by 4 times π.

## What is a Helical Antenna?

A helical antenna is a specialized type of antenna that is designed to radiate and receive electromagnetic waves in circular or elliptical polarization. It is constructed by winding a wire in the shape of a helix or spring around a cylindrical or conical form. The key parameters of a helical antenna are the diameter and pitch of the helix, the number of turns, and the overall length of the antenna. These parameters determine the antenna’s operating frequency, gain, and radiation pattern. The helical antenna is widely used in applications such as satellite communication, space probe communication, and radio astronomy due to its ability to produce a directional radiation pattern and to operate over a wide frequency band.

## How to Calculate Helical Antenna?

The following steps outline how to calculate the Cost Recovery Ratio for a Helical Antenna:

- First, determine the total cost of the helical antenna ($).
- Next, determine the revenue generated by the helical antenna ($).
- Next, gather the formula from above = CRR = Revenue / Cost.
- Finally, calculate the Cost Recovery Ratio for the helical antenna.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge for a Helical Antenna:

Total cost of the helical antenna ($) = 500

Revenue generated by the helical antenna ($) = 800