Helical Antenna Length Calculator

Formula

The formula to calculate the Helical Antenna Length (L) is:

$\text{L} = \frac{\text{C} \cdot \lambda}{4 \cdot \pi}$

Where:

L – The length of the helical antenna.
C – The circumference of the helix.
λ – The wavelength of the signal.
π – A mathematical constant (approximately 3.14159).

Definition

Helical Antenna: A specialized type of antenna designed to radiate and receive electromagnetic waves in circular or elliptical polarization.
Circumference of the Helix (C): The distance around the helix.
Wavelength of the Signal (λ): The distance over which the wave's shape repeats.
π: A mathematical constant (approximately 3.14159).

Example

Let's say the circumference of the helix (C) is 1 meter and the wavelength of the signal (λ) is 0.5 meters. Using the formula:

$\text{L} = \frac{1 \cdot 0.5}{4 \cdot 3.14159} \approx 0.04 \, \text{meters}$

So, the length of the helical antenna is approximately 0.04 meters.

Vertical Antenna Length Calculator

Definition: Calculates the length of a vertical antenna based on the desired frequency.

Formula: $L = \frac{300}{4 \times f}$

$L$ : Length of the antenna (in meters)
$f$ : Frequency (in MHz)

Example: $L = \frac{300}{4 \times 14}$

Antenna Length Calculator Formula

Definition: Provides the formula to calculate the length of an antenna.

Formula: $L = \frac{300}{2 \times f}$

$L$ : Length of the antenna (in meters)
$f$ : Frequency (in MHz)

Example: $L = \frac{300}{2 \times 7}$

Dimensions of Helical Antenna

Definition: Calculates the dimensions of a helical antenna.

Formula: $L = N \times \lambda$

$L$ : Length of the helix
$N$ : Number of turns
$\lambda$ : Wavelength

Example: $L = 10 \times 0.3$

Vertical Antenna Radial Length Calculator

Definition: Calculates the radial length for a vertical antenna.

Formula: $R = \frac{300}{4 \times f}$

$R$ : Radial length (in meters)
$f$ : Frequency (in MHz)

Example: $R = \frac{300}{4 \times 14}$

Telescopic Antenna Length Calculator

Definition: Calculates the length of a telescopic antenna based on the desired frequency.

Formula: $L = \frac{300}{2 \times f}$

$L$ : Length of the antenna (in meters)
$f$ : Frequency (in MHz)

Example: $L = \frac{300}{2 \times 10}$

Radio Antenna Length Calculator

Definition: Calculates the length of a radio antenna based on the desired frequency.

Formula: $L = \frac{300}{2 \times f}$

$L$ : Length of the antenna (in meters)
$f$ : Frequency (in MHz)

Example: $L = \frac{300}{2 \times 15}$

Antenna Length Calculator by Frequency

Definition: Calculates the length of an antenna based on the frequency.

Formula: $L = \frac{300}{2 \times f}$

$L$ : Length of the antenna (in meters)
$f$ : Frequency (in MHz)

Example: $L = \frac{300}{2 \times 20}$

VHF Antenna Length Calculator

Definition: Calculates the length of a VHF antenna based on the desired frequency.

Formula: $L = \frac{300}{2 \times f}$

$L$ : Length of the antenna (in meters)
$f$ : Frequency (in MHz)

Example: $L = \frac{300}{2 \times 50}$

Helical Antenna Gain Calculator

Definition: Calculates the gain of a helical antenna.

Formula: $G = 10 \log_{10} \left( \frac{4 \pi A}{\lambda^2} \right)$

$G$ : Gain
$A$ : Area of the antenna
$\lambda$ : Wavelength

Example: $G = 10 \log_{10} \left( \frac{4 \pi \times 0.5}{0.3^2} \right)$