Antenna Efficiency Calculator and Formula

This page provides an antenna efficiency calculator along with the formula used in its calculations. The example provided focuses on a parabolic reflector antenna.

Antenna Efficiency Calculator Example

Here’s how to use the calculator:

INPUTS:

• Antenna diameter = 2.4 meters
• Antenna Gain (dBi) = 43
• Antenna frequency = 6000 MHz

OUTPUT:

• Antenna efficiency = 87.75 %

Antenna Efficiency Formula

The following section details the equation used to calculate antenna efficiency.

The Antenna Gain equation can be expressed as shown in the image above. From this equation, antenna efficiency can be derived and calculated using the calculator mentioned earlier. The inputs required for this calculation are antenna diameter, antenna gain, and antenna frequency. The derived formula for antenna efficiency, based on the antenna gain equation, is shown in the image.