Antenna Gain Calculator

This calculator computes the gain of an antenna based on its frequency and dimensions. Antenna gain is a measure of how well an antenna can direct or concentrate radio frequency energy in a particular direction compared to a reference antenna.

Input Parameters

Calculation Results

Calculation Formula

Gain (dBi) = 10 * log10 (4π * (length * width) / (λ^2))

Where:
Gain is the antenna gain in decibels (dBi)
length is the length of the antenna in meters
width is the width of the antenna in meters
λ (lambda) is the wavelength in meters, calculated as λ = c / f
c is the speed of light (3 x 10^8 m/s)
f is the frequency in Hz

Antenna Gain Calculator Usage Guide

Learn how to use the Antenna Gain Calculator and understand its working principles

How to Use the Calculator

  1. Enter the frequency of the antenna in MHz.
  2. Enter the physical length of the antenna in meters.
  3. Enter the physical width of the antenna in meters.
  4. Click the "Calculate" button to compute the antenna gain in dBi.
  5. Use the "Reset" button to clear all input fields and start over.

Working Principle

The antenna gain is calculated based on the physical dimensions of the antenna and the frequency at which it operates. The formula used is:

Gain (dBi) = 10 * log10 (4π * (length * width) / (λ^2))

Where λ (lambda) is the wavelength, calculated as the speed of light divided by the frequency.

Applications

Antenna gain is an important parameter in wireless communication systems, satellite communications, radar systems, and other applications where signal strength and directionality are critical. A higher gain antenna can focus more energy in a specific direction, improving signal quality and range.