This free online tool allows predicting the array factor and directivity of an antenna array in a variety of configurations.

This calculator determines the gain of a parabolic antenna based on its specifications. Antenna Gain Calculation Cheat Sheet Download for Free

Press the "Compute" button to calculate and plot the radiation pattern of non-uniformly excited and non-uniformly spaced array.

Calculates length of wire dipole antenna and plots the normalized radiation pattern.

Calculate the gain of a parabolic reflector antenna based on its diameter, efficiency and frequency.

This antenna wavelength calculator can be used to determine the physical length of an antenna's electromagnetic wave in free space.

This calculator provides a station's effective radiated power using transmitter, antenna and all gains and losses from everything in between.

This calculator calculates the reactive near field distance, radiating near field distance (Fresnel region) and the far field distance.

Antenna Factor and Gain Calculations. Enter in the desired frequency and one other parameter and this tool will calulate the remaining fields.

This dipole antenna calculator determines the size of a simple dipole antenna for a given frequency and the dipole wire diameter.