To Plot the Radiation Pattern and Determining Gain of a Pyramidal Horn Antenna.

In satellite communication, highly directional antennas are used to
_________ of an antenna is a plot of the magnitude of the far field strength versus position around the antenna.
_______ of an antenna is a measure of how the antenna concentrates its radiated power in a given direction.
An antenna when radiating, has a highly directional radiation pattern. When the antenna is receiving its radiation pattern
If an antenna has a directivity of 16 and radiation efficiency of 0.9, then the gain of the antenna is: