Dipole antenna calculator (antenna length formula, dipole calculator)
The dipole antenna length calculator allows you to determine the total length and the length of each element of a dipole antenna depending on the frequency used.
This tool is useful for radio enthusiasts, RF engineers and technicians working on antenna systems.
Formula used
Total length (L) = 468/f MHz
Length of each element (E) = (468 / f MHz ) / 2
Explanation
The total length L corresponds to the complete physical length of the dipole antenna, while E represents the length of a single arm of the dipole.
The frequency f must be expressed in MHz. A higher frequency results in a shorter antenna, and vice versa.
This formula is derived from the classical relationship between wavelength and frequency for a resonant dipole.
Calculation example
For an antenna operating at 14 MHz :
Total length L = 468 / 14 ≈ 33.43 feet
Length of each element E = 33.43 / 2 ≈ 16.72 feet
Benefits and Use
- Allows you to quickly design a dipole antenna adapted to the desired frequency.
- Facilitates the installation and sizing of antennas for amateur radio and RF systems.
- Optimizes antenna resonance and performance for better reception and transmission.
- Useful for comparing different frequencies and adjusting the antenna length accordingly.