Distributed circuit theory - wykład

Distributed circuit theory The first of these is known as distributed circuit theory (which is one step up from lumped
circuit theory) and resembles lumped circuit theory to some degree. This level of theory is applicable when we still have
• an idea of where the currents are, either on thin wires or spread uniformly over
either the cross section or the surface of a wire of finite size, and
• some idea of the shape of the magnetic field distribution and that there are planes
in which although the magnetic field varies from point to point within the plane, the
magnetic field is everywhere parallel to that plane.
When this last condition is satisfied we have a situation where the line integral of the
electric field between two points in that plane is independent of the path (provided the
path is confined to that plane) and we can still usefully speak of the potential difference
between two points in the plane.
In distributed circuit theory current and potential concepts may still be used subject
to the limitations just recognised. We will apply this methodology extensively in our
study of transmission lines in Chapters 2 and 3.
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