Antenna Gain Calculator

Antenna Gain Formula:


Enter the unknown value as ‘ x.’

Enter Efficiency (η) = %

Enter WaveLength (λ)= m

Enter Physical Aperture Area (A) = m2

Enter Antenna Gain =(Gdbi) decibels

x =


Antenna Gain Calculator is a free online tool that displays the antenna gain for the given wavelength, efficiency and the physical aperture area. BYJU’S online antenna gain calculator tool performs the calculation faster, and it displays the antenna gain in a fraction of seconds.

How to Use the Antenna Gain Calculator? 

The procedure to use the antenna gain calculator is as follows:

Step 1: Enter the wavelength, efficiency, physical aperture area and x for the unknown in the input field

Step 2: Now click the button “Calculate x” to get the result

Step 3: Finally, the antenna gain for the given inputs will be displayed in the output field

What is Meant by Antenna Gain?

In Physics, the antenna gain is the combination of the electrical efficiency and the antenna’s directivity. The symbol used to represent the antenna gain is “dB”. We know that “dB” is the measurement unit of the loss or gain. The antenna gain can be found easily if the wavelength, efficiency and the physical aperture area are known. 

Also, read: Wavelength Formula

The formula to calculate the antenna gain is given by:

Antenna Gain, GdBi  = 10 log10 (η4πA/λ2)


A is the physical aperture area

η is the efficiency

λ is the wavelength.


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