Parabolic Reflector Antenna Gain Calculator

The below formula is used to calculate the gain of a parabolic dish antenna, 

where, 

D is the diameter of the parabolic reflector dish, and 
λ is the wavelength of the antenna 

A parabolic reflector antenna is a highly directional antenna that can transmit or receive signals with high gain and small beam width. It consists of two main parts – a parabolic dish reflector and a feed antenna that is located in the middle of the dish. The parabolic shape of the dish ensures that the signals are focused, thereby directing radio waves over a narrow beamwidth in a particular direction or receiving them in a specific direction, resulting in higher signal strength and propagation distance. Due to its high directivity and gain, these antennas are used at high frequencies, typically over 1 MHz.