[[Image:NEOWEB18.png|thumb|400px|Measuring the field maps of a planar microstrip bandpass filter in and out of its passband.]]
=== Why Measure Fields? ===
Measurement of electric and magnetic fields has numerous uses and applications in different areas of RF technology. First and foremost, field maps shed light on the physical behavior of RF devices and systems. RF engineers typically use external measurement systems for high frequency characterization. For example, a network analyzer measures the port characteristics of a device. Antennas are usually characterized by their far field radiation patterns. Such external measurements do not reveal much about how signals, fields and waves evolve, build up and propagate inside a device from one port to another, or out into the free space.
=== What Can You Use the NeoScan System For?===
{{#ev:youtube|https://www.youtube.com/watch?v=l9xrzP6XP2g|400|right|Characterizing an S-band microstrip-fed patch antenna.|frame}}