Near Field and Far Field Range Calculator

The Farfield Calculator is a specialized tool used to determine the far-field distance for antennas or radiating sources. This is the distance beyond which the angular field distribution of the antenna becomes essentially independent of distance from the source, allowing for stable and accurate measurements of radiation patterns, gain, and other properties. This concept is crucial in RF (radio frequency) and antenna engineering, where understanding the transition from near-field to far-field is necessary for accurate measurements and reliable system design.

Near Field and Far Field Range Calculator

Near Field and Far Field Range Calculator

REACTIVE NEAR FIELD BOUNDARY: 0 m

RADIATING NEAR FIELD BOUNDARY (FRESNEL REGION): 0 m

FAR FIELD BOUNDARY: 0 m

Formulas Used

Here are the formulas for the Reactive Near Field, Radiating Near Field (Fresnel Region), and Far Field (Fraunhofer Region). Input antenna diameter and frequency to get accurate results and optimize your antenna design and analysis.


Wavelength(c is the speed of light and f is the frequency in Hz).
Far Field (Fraunhofer region): D is the largest dimension of the antenna
Radiating Near Field (Fresnel Region): 
Reactive Near Field (Fresnel Region):

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