Kopplingsmotstånd

Kopplingsmotstånd, often translated as coupling resistance or mutual resistance, is a concept primarily used in electrical engineering to describe the unwanted resistance that exists between two conductors that are not intentionally connected. This resistance arises from the proximity of these conductors and the electromagnetic fields they generate. When current flows through one conductor, it induces a voltage in the adjacent conductor. If there is a conductive path between them, even a poorly conductive one, a current will flow, resulting in an apparent resistance between the two.

This phenomenon is distinct from direct electrical resistance, which is the inherent opposition to current flow within a single conductor. Kopplingsmotstånd is a parasitic effect that can lead to signal loss, interference, and noise in electronic circuits. It is particularly relevant in high-frequency applications where electromagnetic coupling is more pronounced. Factors influencing kopplingsmotstånd include the distance between conductors, their geometry, the material properties of the surrounding medium, and the frequency of the signals involved. Minimizing kopplingsmotstånd is often a key consideration in the design of printed circuit boards and other electronic assemblies to ensure signal integrity and reliable operation. Shielding and proper grounding techniques are common methods employed to reduce its impact.