Once the signal is transmitted it is sent to the receive antenna.  The receive antenna must first be checked to make sure it is in the far field region in order to get accurate results.  In order to check this, equations (1) (2) and (3), shown below, are used.

Using this distance, 2.67 meters, the antenna range is set up.  The antenna under test (AUT) chosen is an identical one to the transmit antenna for proof of concept.  The final receive set up, including the pedestal and anechoic wall is shown below.

The receive antenna is connected to a spectrum analyzer, Agilent E4402B, via coax cable.  The spectrum analyzer is used to record the data of the antenna.  This data is then sent to a computer.  The measurement is taken at certain angles around the 360 degree horizontal plane, up to 200 points can be measured.  The data collected is then compiled into a single file, and used to analyze the antenna.