Parabolic Antenna Calculator

This page provides a Parabolic Antenna calculator for determining key performance characteristics. The calculator determines the gain, half-power beamwidth, and effective aperture of a parabolic antenna.

It requires the operating frequency (in GHz) and the diameter of the dish as inputs.

Parabolic Antenna Calculator

Inputs Clear Input

Frequency of operation in GHz

Antenna diameter in meter

Outputs Calculate

Antenna Gain in dB

Half Power Beamwidth in degrees

Effective Aperture in meter2

This calculator computes gain, beamwidth, and aperture based on frequency and diameter inputs.

• Inputs: Frequency (GHz), Diameter (meter)
• Outputs: Gain (dB), Beamwidth (degrees), Aperture (meter²)

Parabolic Antenna Calculator Example

• Inputs:
  • Frequency = 14.5 GHz
  • Diameter = 3.5 meter
• Outputs:
  • Gain = 52.3 dB
  • Beamwidth = 0.35 degrees
  • Aperture = 5.77 meter²

Parabolic Antenna Calculator Equation

Parabolic dish antennas are commonly used worldwide as satellite TV channel receivers. They often employ a Cassegrain design, where a horn antenna is placed at the focal point of the dish.

Typically, these antennas have two reflectors: a sub-reflector and a main reflector. The signal to be transmitted is first emitted from the horn antenna, reflects off the sub-reflector, and then reflects off the parabolic dish main reflector.

The following equation/formula is used for the Parabolic Antenna calculator:

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