The simple system will have three parts, the source, the cause of the interference, and some means of a coupling.
The source may be anything from an electrical wire to antennas of a wireless Local Area Network. Coupling will be realized by the current should common conductors from different circuits share the electromagnetic field. The drain of EM disturbance could be any type of apparatus or even any part of the electrical system. It is important to develop a matrix that has all the possible coupling paths, sources as well as the likely disturbed objects. The matrix will identify four types of EMI that should be of concern in our system namely impedance, inductive, capacitive, and radiative coupling (Kodali, 1996). A manufacturing factory is bound to have high electronic noise thanks to inductive coupling followed by capacitive coupling and impedance coupling. It is also expected that the heightened use of wireless media in the future will significantly cause an increase in the EMI from this source (Kodali, 1996).
When different circuits use common coupling impedances and common lines, it will result in the galvanic coupling. Engineering Electromagnetic Compatibility.
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