{{#ev:youtube|https://www.youtube.com/watch?v=sjG2aua-4mk|400|right|Characterizing an S-band microstrip-fed patch antenna.|frame}}
[[NeoScan]] systems can be used as an essential tool for characterization, test and evaluation of antennas and phased array systems. It is a well-established fact that once you have an accurate estimate of the aperture fields, you can compute the far -field radiation patterns of an antenna with reasonable accuracy. This fact is based on the equivalence principle and the Huygens theory in electromagnetics. Time domain electromagnetic simulation tools such as [[EM.Tempo]] use a near-to-far-field transformation based on this principle to compute the far-zone fields of any radiating structure.
Click here to learn more about '''[[Maxwell%27s_Equations#Computing_the_Far-Zone_Fields_from_Near-Zone_Data| Near-to-Far-Field Transformation]]'''.