High Quality Content by WIKIPEDIA articles! A phantom loop is a suitably arranged electrical network that includes within the number of conductive paths part of the natural environment (which can be at the same time acting as a conductor of another circuit) to complete a circuit. It is a form of open system. Phantom loops can occur in suspended circuits, in which the conductor has no ground and uses the ionosphere to complete the circuit at both ends. Phantom loops can also occur in grounded circuits, in which the conductor has a ground and uses the lower atmosphere to complete the circuit at both ends (with the waves traversing the magnetic poles of the Earth).

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