Reference antenna
A reference antenna is an antenna with known performance. It is normally used to calibrate other systems.
Reference antennas are built with particular care taken to make them simple, robust and repeatable. In a common usage scenario a reference antenna would be used as a transfer standard. First the reference antenna's performance is measured using high accuracy measurement facility. This test may be done using an electromagnetic anechoic chamber or another type of antenna test range (see Antenna measurements). The antenna is then measured using a second antenna test facility. The results from the two are compared, the comparison can reveal the accuracy of the second test facility. It can also be used to calibrate the second facility.