Capacitive coupling
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In electronics, capacitive coupling is the transfer of energy from one circuit to another by means of the mutual capacitance between the circuits. This can be an intentional or accidental effect. It only works well enough to be of practical use in relatively short ranges, such as some RFID applications.
Capacitive coupling favors transfer of the higher frequency components of a signal, whereas inductive coupling favors lower frequency components, and conductive coupling favors neither higher nor lower frequency components.
Some of the information in this entry taken from Federal Standard 1037C and from MIL-STD-188.