Vol. 61 | no. 1 | January - March 2013 Article 10

The Phenomena of Capacitive Coupling at the Surface of PCBs
(full text in English)

Alina Elena DUMITRU (RADU)
Capacitive coupling occurs between conductors, circuits located at different potentials, and among them there are ways of closing the currents produced by the potential difference. The purpose of this paper is to emphasize the capacitive coupling that appears between two conductors located on a PCB. The problem is related to the appearance of  some disruptive voltages on parallel capacitive coupled conductors. This voltage may appear at the air filters for air purification or electrostatic chargers for electrostatic copy machine. With the Electrostatics model from Comsol Multiphysics it was studied capacitive coupling at the surface of a PCB in various cases.
Keywords: coupling circuits, crosstalk, electromagnetic compatibility, electromagnetic coupling, electromagnetic propagation, electromagnetic interference, electromagnetic shielding, PCB