EMC Question of the Week: February 18, 2019
Another name for electric-field coupling is
- conducted coupling
- capacitive coupling
- inductive coupling
- radiated coupling
Answer
The correct answer is "b." There are exactly four EM coupling mechanisms, and they are the four choices listed here. Conducted coupling is sometimes referred to as common-impedance coupling. Capacitive coupling is also called electric-field coupling. Inductive coupling is also known as magnetic-field coupling.
Electric-field coupling between two conductors is represented schematically with a mutual capacitance between the conductors. Mutual capacitance is often easier to quantify, and it is more intuitive in many applications. So while some people may use the term electric-field coupling and others may prefer capacitive coupling; it is important to remember that these are two names for the same phenomenon.
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